U.S. patent application number 17/489705 was filed with the patent office on 2022-03-31 for driving mechanism and air door device.
This patent application is currently assigned to NIDEC SANKYO CORPORATION. The applicant listed for this patent is NIDEC SANKYO CORPORATION. Invention is credited to Satoru YOKOE.
Application Number | 20220099350 17/489705 |
Document ID | / |
Family ID | |
Filed Date | 2022-03-31 |
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United States Patent
Application |
20220099350 |
Kind Code |
A1 |
YOKOE; Satoru |
March 31, 2022 |
DRIVING MECHANISM AND AIR DOOR DEVICE
Abstract
A driving mechanism and an air door device including the driving
mechanism. A switch signal can be switched when a driving gear
rotates forward to one position and rotates backward to another
position. The driving mechanism comprises the following components
in a shell: a switch; a rotary pressing member rotating toward a
pressing direction in which a first pressing portion presses the
switch and a departure direction in which the first pressing
portion departs from the switch; a force application component for
driving the rotary pressing member to rotate toward the pressing
direction; a driving gear for driving the rotary pressing member to
rotate, a motor for driving the driving gear to rotate and a driven
gear being engaged with the driving gear are further arranged in
the shell, the driving gear is provided with a first abutting
portion and a second abutting portion arranged along the
circumferential direction.
Inventors: |
YOKOE; Satoru; (NAGANO,
JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
NIDEC SANKYO CORPORATION |
Nagano |
|
JP |
|
|
Assignee: |
NIDEC SANKYO CORPORATION
Nagano
JP
|
Appl. No.: |
17/489705 |
Filed: |
September 29, 2021 |
International
Class: |
F25D 17/04 20060101
F25D017/04; F24F 13/14 20060101 F24F013/14; F25D 17/08 20060101
F25D017/08 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 30, 2020 |
CN |
202022204210.6 |
Claims
1. A driving mechanism, comprising a shell, wherein a switch
mechanism is arranged in the shell, and the switch mechanism
comprises: a switch; a rotary pressing member, wherein the rotary
pressing member is provided with a first pressing portion and a
second pressing portion arranged in the circumferential direction
around the rotation axis of the rotary pressing member, and is
capable of rotating toward a pressing direction in which the first
pressing portion presses the switch and a departure direction in
which the first pressing portion departs from the switch; a force
application component, wherein the force application component
applies a force to the rotary pressing member to drive the rotary
pressing member to rotate toward one of the pressing direction and
the departure direction; and a driving gear, wherein the driving
gear abuts against the second pressing portion to drive the rotary
pressing member to rotate, a motor and a driven gear are further
arranged in the shell, the driving gear rotates under the driving
of the motor, and the driven gear can be engaged with the driving
gear, wherein, the motor is a bidirectionally rotatable stepping
motor, the driving gear is provided with a first abutting portion
and a second abutting portion arranged in the circumferential
direction around the rotation axis of the driving gear, and is
configured to: when the driving gear rotates toward a first
direction to a first position, drive the first abutting portion to
start to abut against the second pressing portion, so that the
rotary pressing member rotates toward the other of the pressing
direction and the departure direction, and when the driving gear
rotates toward a second direction opposite to the first direction
to a second position, drive the second abutting portion to start to
abut against the second pressing portion, so that the rotary
pressing member rotates toward the other of the pressing direction
and the departure direction.
2. The driving mechanism of claim 1, wherein, a gear transmission
mechanism is further arranged in the shell, the gear transmission
mechanism transmits the rotation of the motor to the driving gear,
and the driving gear comprises: a driving gear shaft portion,
wherein the driving gear shaft portion extends along the rotation
axis of the driving gear; a first gear portion, wherein the first
gear portion is arranged on the driving gear shaft portion in such
a manner that the rotation axis of the first gear portion is
consistent with the rotation axis of the driving gear, and the
first gear portion is engaged with the last stage gear in the gear
transmission mechanism; a second gear portion, wherein the second
gear portion is arranged on the driving gear shaft portion in such
a manner that the rotation axis of the second gear portion is
consistent with the rotation axis of the driving gear, and the
second gear portion is engaged with the driven gear; a first
protrusion portion, wherein the first protrusion portion extends
radially outward from the driving gear shaft portion and
constitutes the first abutting portion; and a second protrusion
portion, wherein the second protrusion portion extends radially
outward from the driving gear shaft portion in the circumferential
direction in a manner of spacing apart from the first protrusion
portion by a gap, and constitutes the second abutting portion.
3. The driving mechanism of claim 1, wherein, the rotation axis of
the rotary pressing member is parallel to the rotation axis of the
driving gear, in the case of observation along the rotation axis of
the rotary pressing member, when the first abutting portion abuts
against the second pressing portion, the angle formed by a
connecting line between the action point of a first force applied
by the first abutting portion to the second pressing portion and
the rotation axis of the rotary pressing member relative to the
direction of the first force is 20 degrees to 160 degrees, and/or,
when the second abutting portion abuts against the second pressing
portion, the angle formed by the connecting line between the action
point of a second force applied by the second abutting portion to
the second pressing portion and the rotation axis of the rotary
pressing member relative to the direction of the second force is 20
degrees to 160 degrees.
4. The driving mechanism of claim 1, wherein, the surface of the
second pressing portion abutting against the first abutting portion
or the second abutting portion is a convex arc surface, and the
surface of the first abutting portion and/or the second abutting
portion abutting against the second pressing portion comprises a
concave arc surface.
5. The driving mechanism of claim 1, wherein, the rotary pressing
member comprises: a pressing member shaft portion, wherein the
pressing member shaft portion extends along the rotation axis of
the rotary pressing member; a first arm portion, wherein the first
arm portion extends radially outward from the pressing member shaft
portion, and the first pressing portion is arranged at the front
end of the first arm portion; and a second arm portion, wherein the
second arm portion extends radially outward from the pressing
member shaft portion, and the second pressing portion is arranged
at the front end of the second arm portion.
6. The driving mechanism of claim 1, wherein, the force application
component is a spiral spring arranged coaxially with the rotary
pressing member, one end of the spiral spring is clamped in the
shell, and the other end of the spiral spring is clamped in the
rotary pressing member.
7. An air door device, comprising: the driving mechanism of claim
1; a frame, wherein the frame is connected to the shell of the
driving mechanism and is provided with an opening portion; and a
baffle, wherein the baffle is arranged on the frame in a manner of
being able to rotate, open and close the opening portion, and is
directly or indirectly connected with the driven gear.
8. The air door device of claim 7, wherein, the baffle is provided
with an elastic sealing sheet, the elastic sealing sheet is
deformed by abutting against the periphery of the opening portion
to completely close the opening portion, in the case that the
driving gear rotates toward the first direction, the baffle rotates
toward the direction of opening the opening portion, in the case
that the driving gear rotates toward the second direction, the
baffle rotates toward the direction of closing the opening portion,
and the engagement between the driving gear and the driven gear is
released immediately before the driving gear rotates toward the
second direction to the second position.
9. An air door device of claim 7, wherein, a gear transmission
mechanism is further arranged in the shell, the gear transmission
mechanism transmits the rotation of the motor to the driving gear,
and the driving gear comprises: a driving gear shaft portion,
wherein the driving gear shaft portion extends along the rotation
axis of the driving gear; a first gear portion, wherein the first
gear portion is arranged on the driving gear shaft portion in such
a manner that the rotation axis of the first gear portion is
consistent with the rotation axis of the driving gear, and the
first gear portion is engaged with the last stage gear in the gear
transmission mechanism; a second gear portion, wherein the second
gear portion is arranged on the driving gear shaft portion in such
a manner that the rotation axis of the second gear portion is
consistent with the rotation axis of the driving gear, and the
second gear portion is engaged with the driven gear; a first
protrusion portion, wherein the first protrusion portion extends
radially outward from the driving gear shaft portion and
constitutes the first abutting portion; and a second protrusion
portion, wherein the second protrusion portion extends radially
outward from the driving gear shaft portion in the circumferential
direction in a manner of spacing apart from the first protrusion
portion by a gap, and constitutes the second abutting portion.
10. An air door device of claim 7, wherein, the rotation axis of
the rotary pressing member is parallel to the rotation axis of the
driving gear, in the case of observation along the rotation axis of
the rotary pressing member, when the first abutting portion abuts
against the second pressing portion, the angle formed by a
connecting line between the action point of a first force applied
by the first abutting portion to the second pressing portion and
the rotation axis of the rotary pressing member relative to the
direction of the first force is 20 degrees to 160 degrees, and/or,
when the second abutting portion abuts against the second pressing
portion, the angle formed by the connecting line between the action
point of a second force applied by the second abutting portion to
the second pressing portion and the rotation axis of the rotary
pressing member relative to the direction of the second force is 20
degrees to 160 degrees.
11. An air door device of claim 7, wherein, the surface of the
second pressing portion abutting against the first abutting portion
or the second abutting portion is a convex arc surface, and the
surface of the first abutting portion and/or the second abutting
portion abutting against the second pressing portion comprises a
concave arc surface.
12. An air door device of claim 7, wherein, the rotary pressing
member comprises: a pressing member shaft portion, wherein the
pressing member shaft portion extends along the rotation axis of
the rotary pressing member; a first arm portion, wherein the first
arm portion extends radially outward from the pressing member shaft
portion, and the first pressing portion is arranged at the front
end of the first arm portion; and a second arm portion, wherein the
second arm portion extends radially outward from the pressing
member shaft portion, and the second pressing portion is arranged
at the front end of the second arm portion.
13. An air door device of claim 7, wherein, the force application
component is a spiral spring arranged coaxially with the rotary
pressing member, one end of the spiral spring is clamped in the
shell, and the other end of the spiral spring is clamped in the
rotary pressing member.
Description
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of China Application No.
202022204210.6, filed Sep. 30, 2020. The entirety of the
above-mentioned patent application is hereby incorporated by
reference herein and made a part of this specification.
BACKGROUND
Field of the Invention
[0002] The embodiments of the present invention relates to a
driving mechanism and an air door device including the driving
mechanism.
Description of the Related Documents
[0003] In refrigerators, freezers and the like, air door devices
are usually arranged in air flow paths from cold air supply sources
to refrigeration spaces to control the amount of cold air sent to
the refrigeration spaces.
[0004] As the above-mentioned air door device, there is an air door
device in the past, which includes a shell and a frame;
furthermore, a motor, a gear transmission mechanism, a driving gear
and a driven gear are arranged in the shell, the frame is provided
with an opening portion, a baffle capable of rotating to open and
close the opening portion and connected to the driven gear, and a
spring for applying a force to the baffle toward the direction of
the driven gear, the rotation output by the motor can be
transmitted to the baffle through the gear transmission mechanism,
the driving gear and the driven gear in sequence, so that the
baffle overcomes the force of the spring to rotate toward the
direction of the opening portion; and furthermore, a switch
assembly is also arranged in the shell, the switch assembly
includes a switch, a rotating rod and a force application
component, the rotating rod is provided with a first arm portion
and a second arm portion, and is capable of rotating toward a first
direction in which the first arm portion presses the switch and
toward a second direction in which the first arm portion departs
from the switch, the force application component applies a force to
the rotating rod to drive the rotating rod to rotate toward the
first direction, a cam portion abutting against the second arm
portion is arranged on the driving gear, so that the driving gear
is driven to rotate with the operation of the motor, and the
rotating rod can be driven to rotate by the abutment between the
cam portion and the second arm portion, accordingly, the on-off
state of the switch can be controlled by using the first arm
portion (see Patent Document 1).
[0005] Patent Document 1: Japanese Patent Laid-Open No. 2018-200773
However, in the above-mentioned air door device, the motor can only
rotate toward one direction, if the motor rotates in a
reciprocating manner, the driving gear cannot drive the second arm
portion to rotate toward the second direction through the abutment
between the cam portion and the second arm portion, and thus a
switch signal (feedback signal) cannot switched. Furthermore, in
the above-mentioned air door device, when the baffle is caused to
close the opening portion, the engagement between the driving gear
and the driven gear is released, and the spring applies a force to
the baffle toward the direction of closing the opening portion.
Therefore, a spring component needs to be arranged, resulting in an
increase in the cost.
SUMMARY
[0006] The embodiment of the present invention is in view of the
above-mentioned problems, and to provide a driving mechanism and an
air door device including the driving mechanism. A switch signal
can be switched when a driving gear rotates forward to one position
and rotates backward to another position.
[0007] In order to achieve the above-mentioned purpose, the
embodiment of the present invention provides a driving mechanism,
including a shell, wherein a switch mechanism is arranged in the
shell, and the switch mechanism includes: a switch; a rotary
pressing member, wherein the rotary pressing member is provided
with a first pressing portion and a second pressing portion
arranged in the circumferential direction around the rotation axis
of the rotary pressing member, and is capable of rotating toward a
pressing direction in which the first pressing portion presses the
switch and a departure direction in which the first pressing
portion departs from the switch; a force application component,
wherein the force application component applies a force to the
rotary pressing member to drive the rotary pressing member to
rotate toward one of the pressing direction and the departure
direction; and a driving gear, wherein the driving gear abuts
against the second pressing portion to drive the rotary pressing
member to rotate, a motor and a driven gear are further arranged in
the shell, the driving gear rotates under the driving of the motor,
and the driven gear can be engaged with the driving gear, wherein
the motor is a bidirectionally rotatable stepping motor, the
driving gear is provided with a first abutting portion and a second
abutting portion arranged in the circumferential direction around
the rotation axis of the driving gear, and is configured to: when
the driving gear rotates toward a first direction to a first
position, drive the first abutting portion to start to abut against
the second pressing portion, so that the rotary pressing member
rotates toward the other of the pressing direction and the
departure direction, and when the driving gear rotates toward a
second direction opposite to the first direction to a second
position, drive the second abutting portion to start to abut
against the second pressing portion, so that the rotary pressing
member rotates toward the other of the pressing direction and the
departure direction.
[0008] According to the driving mechanism of the embodiment of the
present invention, the motor is the bidirectionally rotatable
stepping motor that drives the driving gear to rotate, the driving
gear is provided with the first abutting portion and the second
abutting portion arranged in the circumferential direction around
the rotation axis of the driving gear, and is configured to: when
rotating toward the first direction to the first position, drive
the first abutting portion to start to abut against the second
pressing portion, so that the rotary pressing member rotates toward
the departure direction (or the pressing direction), and when
rotating toward the second direction opposite to the first
direction to the second position, drive the second abutting portion
to start to abut against the second pressing portion, so that the
rotary pressing member rotates toward the departure direction (or
the pressing direction). Therefore, the driving gear can be driven
by the motor to rotate toward the first direction and the second
direction, and when the driving gear rotates toward the first
direction to the first position and toward the second direction to
the second position, the switch can be switched from an on state
(or an off state) to the off state (or the on state), that is, a
switch signal can be switched.
[0009] In addition, in the switch mechanism of the embodiment of
the present invention, preferably, a gear transmission mechanism is
further arranged in the shell, the gear transmission mechanism
transmits the rotation of the motor to the driving gear, and the
driving gear includes: a driving gear shaft portion, wherein the
driving gear shaft portion extends along the rotation axis of the
driving gear; a first gear portion, wherein the first gear portion
is arranged on the driving gear shaft portion in such a manner that
the rotation axis of the first gear portion is consistent with the
rotation axis of the driving gear, and the first gear portion is
engaged with the last stage gear in the gear transmission
mechanism; a second gear portion, wherein the second gear portion
is arranged on the driving gear shaft portion in such a manner that
the rotation axis of the second gear portion is consistent with the
rotation axis of the driving gear, and the second gear portion is
engaged with the driven gear; a first protrusion portion, wherein
the first protrusion portion extends radially outward from the
driving gear shaft portion and constitutes the first abutting
portion; and a second protrusion portion, wherein the second
protrusion portion extends radially outward from the driving gear
shaft portion in the circumferential direction in a manner of
spacing apart from the first protrusion portion by a gap, and
constitutes the second abutting portion.
[0010] According to the driving mechanism of the embodiment of the
present invention, the driving gear includes: the driving gear
shaft portion, wherein the driving gear shaft portion extends along
the rotation axis of the driving gear; the first protrusion
portion, wherein the first protrusion portion extends radially
outward from the driving gear shaft portion and constitutes the
first abutting portion; and the second protrusion portion, wherein
the second protrusion portion extends radially outward from the
driving gear shaft portion and constitutes the second abutting
portion. Therefore, there is no need to change the relative
position relationship between the main body of the rotary pressing
member and the main body of the driving gear, and the first
position and the second position can be conveniently changed just
by changing the protruding lengths of the first protrusion portion
and the second protrusion portion.
[0011] In addition, in the switch mechanism of the embodiment of
the present invention, preferably, the rotation axis of the rotary
pressing member is parallel to the rotation axis of the driving
gear, in the case of observation along the rotation axis of the
rotary pressing member, when the first abutting portion abuts
against the second pressing portion, the angle formed by a
connecting line between the action point of a first force applied
by the first abutting portion to the second pressing portion and
the rotation axis of the rotary pressing member relative to the
direction of the first force is 20 degrees to 160 degrees, and/or,
when the second abutting portion abuts against the second pressing
portion, the angle formed by the connecting line between the action
point of a second force applied by the second abutting portion to
the second pressing portion and the rotation axis of the rotary
pressing member relative to the direction of the second force is 20
degrees to 160 degrees.
[0012] According to the driving mechanism of the embodiment of the
present invention, the rotation axis of the rotary pressing member
is parallel to the rotation axis of the driving gear, in the case
of observation along the rotation axis of the rotary pressing
member, when the first abutting portion abuts against the second
pressing portion, the angle formed by the connecting line between
the action point of the first force applied by the first abutting
portion to the second pressing portion and the rotation axis of the
rotary pressing member relative to the direction of the first force
is 20 degrees to 160 degrees, and/or, when the second abutting
portion abuts against the second pressing portion, the angle formed
by the connecting line between the action point of the second force
applied by the second abutting portion to the second pressing
portion and the rotation axis of the rotary pressing member
relative to the direction of the second force is 20 degrees to 160
degrees. Therefore, the first force and the second force for
switching the switch from the on state to the off state may be
small.
[0013] In addition, in the switch mechanism of the embodiment of
the present invention, preferably, the surface of the second
pressing portion abutting against the first abutting portion or the
second abutting portion is a convex arc surface, and the surface of
the first abutting portion and/or the second abutting portion
abutting against the second pressing portion includes a concave arc
surface.
[0014] According to the driving mechanism of the embodiment of the
present invention, the surface of the second pressing portion
abutting against the first abutting portion or the second abutting
portion is the convex arc surface, and the surface of the first
abutting portion and/or the second abutting portion abutting
against the second pressing portion includes the concave arc
surface. Therefore, it is easy to form smooth contact among the
first abutting portion, the second abutting portion and the second
pressing portion, thereby reducing abrasion and prolonging the
service life.
[0015] In addition, in the switch mechanism of the embodiment of
the present invention, preferably, the rotary pressing member
includes: a pressing member shaft portion, wherein the pressing
member shaft portion extends along the rotation axis of the rotary
pressing member; a first arm portion, wherein the first arm portion
extends radially outward from the pressing member shaft portion,
and the first pressing portion is arranged at the front end of the
first arm portion; and a second arm portion, wherein the second arm
portion extends radially outward from the pressing member shaft
portion, and the second pressing portion is arranged at the front
end of the second arm portion.
[0016] In addition, in the switch mechanism of the embodiment of
the present invention, preferably, the force application component
is a spiral spring arranged coaxially with the rotary pressing
member, one end of the spiral spring is clamped in the shell, and
the other end of the spiral spring is clamped in the rotary
pressing member.
[0017] In addition, in order to achieve the above-mentioned
purpose, the embodiment of the present invention provides an air
door device, including: the driving mechanism of any one of the
above items; a frame, wherein the frame is connected to the shell
of the driving mechanism and is provided with an opening portion;
and a baffle, wherein the baffle is arranged on the frame in a
manner of being able to rotate, open and close the opening portion,
and is directly or indirectly connected with the driven gear.
[0018] In addition, in the air door device of the embodiment of the
present invention, preferably, the baffle is provided with an
elastic sealing sheet, the elastic sealing sheet is deformed by
abutting against the periphery of the opening portion to completely
close the opening portion, in the case that the driving gear
rotates toward the first direction, the baffle rotates toward the
direction of opening the opening portion, in the case that the
driving gear rotates toward the second direction, the baffle
rotates toward the direction of closing the opening portion, and
the engagement between the driving gear and the driven gear is
released immediately before the driving gear rotates toward the
second direction to the second position.
[0019] According to the air door device of the embodiment of the
present invention, after the driving gear rotates toward the second
direction to a position where the engagement between the driving
gear and the driven gear is released, the driving gear rotates
idly, and the baffle rotates to a position where the elastic
sealing sheet is deformed by abutting against the periphery of the
opening portion to completely close the opening portion. Therefore,
the baffle can be locked at the closed position through the
elasticity of the elastic sealing sheet, so that a spring for
keeping the baffle in the state of closing the opening portion can
be omitted, and thus the manufacturing cost can be reduced.
The Effect of the Embodiment of the Present Invention
[0020] According to the embodiment of the present invention, the
motor is the bidirectionally rotatable stepping motor that drives
the driving gear to rotate, the driving gear is provided with the
first abutting portion and the second abutting portion arranged in
the circumferential direction around the rotation axis of the
driving gear, and is configured to: when rotating toward the first
direction to the first position, drive the first abutting portion
to start to abut against the second pressing portion, so that the
rotary pressing member rotates toward the departure direction (or
the pressing direction), and when rotating toward the second
direction opposite to the first direction to the second position,
drive the second abutting portion to start to abut against the
second pressing portion, so that the rotary pressing member rotates
toward the departure direction (or the pressing direction).
Therefore, the driving gear can be driven by the motor to rotate
toward the first direction and the second direction, and when the
driving gear rotates toward the first direction to the first
position and toward the second direction to the second position,
the switch can be switched from the on state (or the off state) to
the off state (or the on state), that is, the switch signal can be
switched.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021] FIG. 1 is a three-dimensional diagram schematically showing
an air door device according to the embodiment of the present
invention, wherein a part of a shell is omitted.
[0022] FIG. 2 is a side view schematically showing the air door
device according to the embodiment of the present invention,
wherein a part of the shell is omitted, and the state when a baffle
rotates to a first position is shown.
[0023] FIG. 3 is a partial side view schematically showing the air
door device according to the embodiment of the present invention,
and showing the state when the baffle rotates to the first
position.
[0024] FIG. 4 is a side view schematically showing the air door
device according to the embodiment of the present invention,
wherein a part of the shell is omitted, and the state when the
baffle rotates to a second position is shown.
[0025] FIG. 5 is a partial side view schematically showing the air
door device according to the embodiment of the present invention,
and showing the state when the baffle rotates to the second
position.
[0026] FIG. 6 is a timing diagram schematically showing the
relationship among the driving of a motor of the air door device,
the action of the baffle and a switch signal according to the
embodiment of the present invention, wherein the solid line
represents an on-off signal of the switch, and the dashed line
represents the rotation angle of the baffle.
[0027] FIG. 7 is a partial side view schematically showing a
modification embodiment of the air door device of the embodiment of
the present invention, and showing the state when the baffle
rotates to the first position.
[0028] FIG. 8 is a partial side view schematically showing a
modification embodiment of the air door device of the embodiment of
the present invention, and showing the state when the baffle
rotates to the second position.
DETAILED DESCRIPTION
[0029] Hereinafter, the air door device according to the embodiment
of the present invention will be described in combination with FIG.
1 to FIG. 6.
[0030] Here, for the convenience of description, three directions
orthogonal to each other are set as an X direction, a Y direction
and a Z direction, further, one side of the X direction is set as
X1, the other side of the X direction is set as X2, one side of the
Y direction is set as Y1, the other side of the Y direction is set
as Y2, one side of the Z direction is set as Z1, the other side of
the Z direction is set as Z2, and the extension of the rotation
axis of a baffle is set to be consistent with the X direction.
[0031] (The Overall Structure of the Air Door Device)
[0032] As shown in FIG. 1, FIG. 3 and FIG. 5, the air door device 1
includes: a driving mechanism 10, and the driving mechanism 10
includes: a shell 11; a frame 20, wherein the frame 20 is connected
to the shell 11 of the driving mechanism 10 and is provided with an
opening portion (not shown); and a baffle 30, wherein the baffle 30
is arranged on the frame 20 in a manner of being able to rotate,
open and close the opening portion, and is driven by the driving
mechanism 10.
[0033] (Structure on the Driving Mechanism Side)
[0034] As shown in FIG. 1 to FIG. 5, a switch mechanism 12 is
arranged in the shell 11 of the driving mechanism 10, and the
switch mechanism 12 includes: a switch 121 (it is a button switch
in the shown example); a rotary pressing member 122, wherein the
rotary pressing member 122 is provided with a first pressing
portion 1223 and a second pressing portion 1224 arranged in the
circumferential direction around the rotation axis of the rotary
pressing member 122, and is capable of rotating toward a pressing
direction (a clockwise direction in FIG. 2) in which the first
pressing portion 1223 presses the switch 121 and a departure
direction (a counterclockwise direction in FIG. 2) in which the
first pressing portion 1223 departs from the switch 121; a force
application component 123, wherein the force application component
123 applies a force to the rotary pressing member 122 to drive the
rotary pressing member 122 to rotate toward one of the pressing
direction and the departure direction (in the shown example, the
force application component 123 applies a force to the rotary
pressing member 122 to drive the rotary pressing member 122 to
rotate toward the pressing direction); and a driving gear 127,
wherein the driving gear 127 abuts against the second pressing
portion 1224 to drive the rotary pressing member 122 to rotate.
Furthermore, a motor 124 and a driven gear 128 are further arranged
in the shell 11, the driving gear 127 rotates under the driving of
the motor 124, and the driven gear 128 can be engaged with the
driving gear 127.
[0035] In addition, as shown in FIG. 1 to FIG. 5, the motor 124 is
a bidirectionally rotatable stepping motor, the driving gear 127 is
provided with a first abutting portion 1273 and a second abutting
portion 1274 arranged in the circumferential direction around the
rotation axis of the driving gear 127, and is configured to: when
the driving gear 127 rotates toward a first direction (the
clockwise direction in FIG. 2) to a first position (the position
shown in FIG. 2 and FIG. 3), drive the first abutting portion 1273
to start to abut against the second pressing portion 1224, so that
the rotary pressing member 122 rotates toward the other of the
pressing direction and the departure direction (in the shown
example, the rotary pressing member 122 rotates toward the
departure direction), and when the driving gear 127 rotates toward
a second direction (the counterclockwise direction in FIG. 2)
opposite to the first direction to a second position (the position
shown in FIG. 4 and FIG. 5), drive the second abutting portion 1274
to start to abut against the second pressing portion 1224, so that
the rotary pressing member 122 rotates toward the other of the
pressing direction and the departure direction (in the shown
example, the rotary pressing member 122 rotates toward the
departure direction).
[0036] Here, as shown in FIG. 1, FIG. 2 and FIG. 4, the shell 11 is
approximately cuboid, and is provided with a shell bottom wall 111,
a top wall (not shown) opposite to the shell bottom wall 111, and
side walls (part of which is not shown) vertically extending from
the periphery of the shell bottom wall 111 to the top wall, wherein
the shell bottom wall 111 and the top wall are opposite to each
other at an interval in the X direction, the side walls include a
pair of opposite side walls in the Y direction and a pair of
opposite side walls in the Z direction (in the shown example, the
shell 11 includes a first shell and a second shell that are
assembled together along the X direction through a clamping
structure, but it is not limited thereto).
[0037] In addition, as shown in FIG. 1, FIG. 3 and FIG. 5, a gear
transmission mechanism 125 is further arranged in the shell 11, and
the gear transmission mechanism 125 transmits the rotation of the
motor 124 to the driving gear 127. Specifically, the motor 124 is,
for example, fixed on the shell bottom wall 111 and is provided
with an output shaft (not shown, extending along the X direction in
the figures), and a pinion (not shown) is arranged on the output
shaft; the gear transmission mechanism 125 includes a first
compound gear 1251 and a second compound gear 1252, wherein the
first compound gear 1251 is rotatably supported on the shell 11
through a fulcrum shaft (extending along the X direction in the
figures), and is provided with a large-diameter gear portion 1251A
engaged with the pinion on the output shaft of the motor 124 and a
small-diameter gear portion 1251B arranged coaxially with the
large-diameter gear portion 1251A, and the second compound gear
1252 is rotatably supported on the shell 11 through a fulcrum
shaft, and is provided with a small-diameter gear portion 1252A
engaged with the small-diameter gear portion 1251B of the first
compound gear 1251 and a large-diameter gear portion 1252B arranged
coaxially with the small-diameter gear portion 1252A; further, the
driving gear 127 includes: a driving gear shaft portion 1270,
wherein the driving gear shaft portion 1270 extends along the
rotation axis of the driving gear 127 (in the shown example, the
rotation axis of the driving gear 127 extends parallel to the X
direction); a first gear portion 1271, wherein the first gear
portion 1271 is arranged on the driving gear shaft portion 1270 in
such a manner that the rotation axis of the first gear portion is
consistent with the rotation axis of the driving gear 127, and the
first gear portion is engaged with the last stage gear in the gear
transmission mechanism 125 (it is the second compound gear 1252 in
the shown example); a second gear portion (not shown), wherein the
second gear portion is arranged on the driving gear shaft portion
1270 in such a manner that the rotation axis of the second gear
portion is consistent with the rotation axis of the driving gear
127 (in the shown example, the second gear portion is arranged on
the X direction side of the first gear portion 1271), and the
second gear portion is engaged with the driven gear 128; a first
protrusion portion, wherein the first protrusion portion extends
radially outward from the driving gear shaft portion 1270 and
constitutes the first abutting portion 1273; and a second
protrusion portion, wherein the second protrusion portion extends
radially outward from the driving gear shaft portion 1270, and
constitutes the second abutting portion 1274.
[0038] In addition, as shown in FIGS. 1 to 5, the rotary pressing
member 122 includes: a pressing member shaft portion 1220, wherein
the pressing member shaft portion 1220 extends along the rotation
axis of the rotary pressing member 122 (in the shown example, the
rotation axis of the rotary pressing member 122 extends parallel to
the X direction); a first arm portion 1221, wherein the first arm
portion 1221 extends radially outward from the pressing member
shaft portion 1220, and the first pressing portion 1223 is arranged
at the front end of the first arm portion 1221; and a second arm
portion 1222, wherein the second arm portion 1222 extends radially
outward from the pressing member shaft portion 1220, and the second
pressing portion 1224 is arranged at the front end of the second
arm portion. Further, the surface of the second pressing portion
1224 abutting against the first abutting portion 1273 or the second
abutting portion 1274 is a convex arc surface (in the shown
example, when being observe along the X direction, the first
pressing portion 1223 and the second pressing portion 1224 are both
approximately circular).
[0039] In addition, as shown in FIG. 1, FIG. 3 and FIG. 5, the
rotation axis of the rotary pressing member 122 is parallel to the
rotation axis of the driving gear 127, in the case of observation
along the rotation axis of the rotary pressing member 122, when the
first abutting portion 1273 abuts against the second pressing
portion 1224, the angle formed by a connecting line LN1 between the
action point of a first force F1 applied by the first abutting
portion 1273 to the second pressing portion 1224 and the rotation
axis of the rotary pressing member 122 relative to the direction of
the first force F1 is 20 degrees to 160 degrees, and/or, when the
second abutting portion 1274 abuts against the second pressing
portion 1224, the angle formed by the connecting line LN2 between
the action point of a second force F2 applied by the second
abutting portion 1274 to the second pressing portion 1224 and the
rotation axis of the rotary pressing member 122 relative to the
direction of the second force F2 is 20 degrees to 160 degrees.
Further, the surface of the first abutting portion 1273 and/or the
second abutting portion 1274 abutting against the second pressing
portion 1224 includes a concave arc surface (in the shown example,
when being observed along the X direction, the first abutting
portion 1273 has a substantially fan shape in which the corner
between the outer circumferential surface and one side face in the
circumferential direction is cut to form the concave arc surface,
and the second pressing portion 1224 has a substantially fan
shape).
[0040] In addition, as shown in FIGS. 1 to 5, the force application
component 123 is a spiral spring arranged coaxially with the rotary
pressing member 122, one end of the spiral spring is directly or
indirectly clamped in the shell 11, and the other end of the spiral
spring is clamped in the rotary pressing member 122.
[0041] In addition, as shown in FIGS. 1 to 5, the driving gear 127
is rotatably supported on the shell 11 through a fulcrum shaft
(extending along the X direction in the shown example), in the
driving gear 127, the first gear portion 1271 is a sector gear, and
the second gear portion is also a sector gear; and furthermore, the
driven gear 128 is rotatably supported on the shell 11 through a
fulcrum shaft (extending along the X direction in the shown
example), and is a sector gear.
[0042] (Structure on the Frame Side)
[0043] As shown in FIG. 1, the frame 20 approximately takes the
shape of a rectangular frame, the frame is provided with frame side
walls 211 opposite to the shell bottom wall 111 of the shell 11 in
the X direction at intervals, and a frame bottom wall (not shown)
for connecting the frame side walls 211 with the shell bottom wall
111, and respectively connecting a pair of opposite frame side
walls in the Y direction and the periphery with the three frame
side walls and the shell bottom wall 111, and the above-mentioned
opening portion is arranged on the frame bottom wall.
[0044] In addition, for example, the both ends of the baffle 30 in
the length direction (the direction consistent with the X direction
in the shown example) are respectively provided with pivot shafts
(not shown) that are rotatably supported by the shell bottom wall
111 and the frame side walls 211, wherein one of the pivot shafts
penetrates through the shell bottom wall 111 to be connected with
the driven gear 128; and, although not shown, the baffle 30 is
provided with an elastic sealing sheet, which abuts against the
periphery of the opening portion when the baffle 30 closes the
opening portion.
[0045] In addition, as shown in FIG. 2 to FIG. 5, when the driving
gear 127 rotates toward the first direction (the clockwise
direction in FIG. 2) to the first position (the position shown in
FIG. 2 and FIG. 3), the baffle 30 rotates the maximum angle or is
about to rotate the maximum angle toward the direction of opening
the opening portion, when the driving gear 127 rotates toward the
second direction (the counterclockwise direction in FIG. 4) to the
second position (the position shown in FIG. 4 and FIG. 5), the
baffle 30 rotates toward the direction of closing the opening
portion to a position where the elastic sealing sheet is deformed
by abutting against the periphery of the opening portion to
completely close the opening portion, furthermore, the driving gear
127 is engaged with the driven gear 128 in an interval where the
driving gear 127 rotates from the first position to a position
before closely adjacent to the second position (the interval is an
angle range of about 90 degrees in the shown example), and the
engagement between the driving gear 127 and the driven gear 128 is
released before the driving gear 127 is about to rotating toward
the second direction to the second position.
[0046] (The Relationship Among the Driving of the Motor, the
Movement of the Baffle and the Switch Signal)
[0047] Referring to FIG. 6 (wherein the horizontal axis represents
the number of driving steps of the motor, and the vertical axis
represents the rotation angle of the baffle), it is taken as an
example for illustration that the baffle 30 rotates from the
position of closing the opening portion of the frame 20 to the
position of completely opening the opening portion of the frame
20.
[0048] As shown in FIG. 6, in a state when the motor 124 is not
driven, the baffle 30 is at the position of closing the opening
portion of the frame 20, and the switch 121 is in an off state.
[0049] Then, at the moment when the motor 124 drives 250 steps
(referring to a point cc in FIG. 6), the on-off state of the switch
121 is switched (specifically, is switched from the off state to
the on state), but the baffle 30 is still at the position of
closing the opening portion of the frame 20.
[0050] Then, at the moment when the motor 124 drives more than 400
steps, the baffle 30 starts to rotate to gradually open the opening
portion of the frame 20.
[0051] Then, at the moment when the motor 124 drives 1500 steps,
the on-off state of the switch 121 is switched again (specifically,
is switched from the on state to the off state).
[0052] Finally, at the moment when the motor 124 drives 1800 steps
(referring to a point op in FIG. 6), the baffle 30 reaches the
position of completely opening the opening portion of the frame 20
(the position where the baffle 30 rotates the maximum angle toward
the direction of opening the opening portion of the frame 20).
Main Effects of this Embodiment
[0053] According to the air door device 1 of this embodiment, the
motor 124 is the bidirectionally rotatable stepping motor that
drives the driving gear 127 to rotate, the driving gear 127 is
provided with the first abutting portion 1273 and the second
abutting portion 1274 arranged in the circumferential direction
around the rotation axis of the driving gear 127, and is configured
to: when rotating toward the first direction to the first position,
drive the first abutting portion 1273 to start to abut against the
second pressing portion 1224, so that the rotary pressing member
122 rotates toward the departure direction (or the pressing
direction), and when rotating toward the second direction opposite
to the first direction to the second position, drive the second
abutting portion 1274 to start to abut against the second pressing
portion 1224, so that the rotary pressing member 122 rotates toward
the departure direction (or the pressing direction). Therefore, the
driving gear 127 can be driven by the motor 124 to rotate toward
the first direction and the second direction, and when the driving
gear 127 rotates toward the first direction to the first position
and toward the second direction to the second position, the switch
121 can be switched from the on state (or the off state) to the off
state (or the on state), that is, the switch signal can be
switched. The embodiment of the present invention is exemplarily
described above in conjunction with the drawings. Obviously, the
specific implementation of the embodiment of the present invention
is not limited by the above-mentioned embodiment.
[0054] For example, in the above-mentioned embodiment, the gear
transmission mechanism 125 is further arranged in the shell 11, the
gear transmission mechanism 125 transmits the rotation of the motor
124 to the driving gear 127, but it is not limited thereto, and the
gear transmission mechanism 125 can also be omitted according to
the situation.
[0055] In addition, in the above-mentioned embodiment, the shapes
of the first abutting portion 1273 and the second abutting portion
1274 of the driving gear 127, and the first pressing portion 1223
and the second pressing portion 1224 of the rotary pressing member
122 can be changed properly as needed. For example, they can be
formed into the shapes shown in FIG. 7 and FIG. 8. In addition, in
the above-mentioned embodiment, the rotation axis of the rotary
pressing member 122 is parallel to the rotation axis of the driving
gear 127, but it is not limited thereto, and it can also be set
such that the rotation axis of the rotary pressing member 122 is
not parallel to the rotation axis of the driving gear 127.
[0056] In addition, in the above-mentioned embodiment, the driving
gear 127 is engaged with the driven gear 128 in the interval where
the driving gear 127 rotates from the first position to the
position before closely adjacent to the second position, the
engagement between the driving gear 127 and the driven gear 128 is
released before the driving gear 127 is about to rotating toward
the second direction to the second position, but it is not limited
thereto, for example, it can also be set such that the engagement
between the driving gear 127 and the driven gear 128 is released
when the driving gear 127 rotates toward the second direction to
the second position.
[0057] In addition, in the above-mentioned embodiment, the force
application component 123 is the spiral spring arranged coaxially
with the rotary pressing member 122, but it is not limited thereto,
and a plate spring or the like can be provided instead of the
spiral spring.
[0058] It should be understood that within the scope of the
embodiment of the present invention, various parts in the
embodiment can be freely combined, or various parts in the
embodiment can be appropriately deformed or omitted.
* * * * *