U.S. patent application number 11/431576 was filed with the patent office on 2007-01-11 for driving mechanism of baby rocking chair.
This patent application is currently assigned to Link Treasure Limited. Invention is credited to Ho-Sheng Chen, Yi-Chen Chen, Hui-Ju Sun, Tse-Chien Wu, Tsung-Yi Wu.
Application Number | 20070010338 11/431576 |
Document ID | / |
Family ID | 36637255 |
Filed Date | 2007-01-11 |
United States Patent
Application |
20070010338 |
Kind Code |
A1 |
Wu; Tse-Chien ; et
al. |
January 11, 2007 |
Driving mechanism of baby rocking chair
Abstract
A driving mechanism of baby rocking chair includes a
transmission system having a transmission motor, a monitoring
device, and a control circuit. When the rocking chair oscillates
upward and approaches a predetermined set-up high point position
that is affected by the gravitational force causing the slowing
down of rotating speed, the monitoring device transmits a signal
and provides the control circuit with the signal. As the rocking
chair reaches the predetermined set-up high point position, the
control circuit is capable of switching the direction of the
rotation of the transmission motor. It is by this way of
controlling the rotating shaft of oscillation of the rocking chair
that the control circuit is capable of driving the rocking chair
steadily.
Inventors: |
Wu; Tse-Chien; (Kaohsiung
City, TW) ; Chen; Ho-Sheng; (Chiai County, TW)
; Wu; Tsung-Yi; (Chiai County, TW) ; Chen;
Yi-Chen; (Chuayi City, TW) ; Sun; Hui-Ju;
(Taichung County, TW) |
Correspondence
Address: |
BIRCH STEWART KOLASCH & BIRCH
PO BOX 747
FALLS CHURCH
VA
22040-0747
US
|
Assignee: |
Link Treasure Limited
|
Family ID: |
36637255 |
Appl. No.: |
11/431576 |
Filed: |
May 11, 2006 |
Current U.S.
Class: |
472/119 |
Current CPC
Class: |
A47D 13/105
20130101 |
Class at
Publication: |
472/119 |
International
Class: |
A63G 9/16 20060101
A63G009/16 |
Foreign Application Data
Date |
Code |
Application Number |
May 17, 2005 |
TW |
094207970 |
Claims
1. A driving mechanism of baby rocking chair mounted at a rocking
chair framework for driving a rotating shaft of the rocking chair
and generating rotation and counter-rotation with a predetermined
angle; the driving mechanism comprises; a transmission system,
further comprises a DC (direct current) power supply, a
transmission motor, and a speed-reducing gear train; by making use
of the DC power supply to provide the transmission motor with
electric energy, the transmission motor is capable of generating
oscillation through the speed-reducing gear train to transmit to
the rotating shaft of the rocking chair; a monitoring device, for
monitoring the rotating speed of the motor and outputting a signal
representing the rotating speed of the motor; and a control
circuit, further comprises a signal-receiving interface, a memory
unit, a motor's steering control circuit; by making use of the
signal-receiving interface to receive the signal and make the
memory unit store a set-up value beforehand, when the rotating
speed representing by the signal attains the predetermined set-up
value, the motor's steering control circuit can make the motor
perform counter-rotation.
2. The driving mechanism of baby rocking chair as claimed in claim
1, wherein the rotating shaft is the one that directly drives the
rocking chair to perform oscillation.
3. The driving mechanism of baby rocking chair as claimed in claim
1, wherein an oscillating arm connected between the rotating shaft
and the rocking chair is the one that oscillates the rocking
chair.
4. The driving mechanism of baby rocking chair as claimed in claim
1, wherein the DC power supply is a storage battery.
5. The driving mechanism of baby rocking chair as claimed in claim
1, wherein the rotating speed is reduced to the lowest when the
rocking chair oscillates to the set-up highest position.
6. The driving mechanism of baby rocking chair as claimed in claim
5, wherein the monitoring device is capable of monitoring the
lowest rotating speed and providing the control circuit with signal
for switching the rotational direction of the transmission
motor.
7. The driving mechanism of baby rocking chair as claimed in claim
1, wherein the monitoring device is a light interruptor.
8. A driving mechanism of baby rocking chair mounted at a rocking
chair framework for driving a rotating shaft of the rocking chair
and generating rotation and counter-rotation with a predetermined
angle; the driving mechanism comprises; a transmission system,
further comprises a power supply, a transmission motor, and a
speed-reducing gear train; by making use of the power supply to
provide the transmission motor with rotation output, the
transmission motor is capable of generating oscillation through the
speed-reducing gear train to transmit to the rotating shaft of the
rocking chair; and the other end of the transmission shaft of the
transmission motor connects a rotating disk having embossed facets
at equal space or blades; a monitoring device, for monitoring and
calculating the rotation range of the rotating disk and outputting
a signal representing the rotation range of the rotating disk; and
a control circuit, further comprises a signal-receiving interface,
a memory unit, a motor's rotating speed control circuit; by making
use of the signal-receiving interface to receive the signal and
make the memory unit store a set-up value beforehand, when the
rotation range representing by the signal attains the predetermined
set-up value, the motor's rotating speed control circuit is capable
of increasing or decreasing the current to increase or decrease the
rotating speed of the transmission motor.
9. The driving mechanism of baby rocking chair as claimed in claim
8, wherein the rotating speed of the rotating disk is the same as
that of the transmission motor.
10. The driving mechanism of baby rocking chair as claimed in claim
8, wherein the monitoring device is the one that is capable of
monitoring the number of embossed facets or blades that have passed
to generate a signal representing the rotation range of the motor.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The invention relates to a driving mechanism of baby rocking
chair, and more particularly, to a driving mechanism of baby
rocking chair that is capable of making the transmission motor
appear counter-rotation through a automatic monitoring circuit when
the oscillation of the rocking chair reaches a predetermined set-up
high point position.
[0003] 2. Description of the Prior Art
[0004] The baby rocking chair mainly provides regular oscillation
to soothe the baby and make the baby fall asleep or provide the
baby with recreation. Among the known products, currently, there is
a baby rocking chair structure that changes the conventional manual
rotation mode into the electrically-driven transmission of
mechanism that is capable of relieving the burden of manual
operation. Relevant documents such as the U.S. Pat. No. 6,319,138
and the Taiwan Patent No. 457907 etc. whose baby rocking chair
mechanisms mainly include members such as a supporting framework,
two oscillating arms, a chair, and a transmission mechanism etc.
Among them, the oscillating arm being connected between the
transmission mechanism and the chair makes use of a transmission
mechanism to drive the oscillating arm to make the chair oscillate
back and forth.
[0005] Conventional relevant transmission mechanism disclosed also
by the U.S. Pat. No. 5,846,136 consists of a transmission motor, a
worm, a rotating gear, and a driving block. Among them, the
rotating gear connects a salient block that eccentrically rotates
with the rotating gear. The driving block includes a extended sheet
having a scoop channel for allowing the salient block to be
contained and moved therein. By the use of the extended sheet, when
the salient block appears eccentric rotation, the fact that the
salient block performs a linear movement in the scoop channel is
capable of transmitting the oscillating arm to perform back and
forth oscillating motion. In the meantime, it is capable of storing
the kinetic energy by the use of a torsion spring.
[0006] Since the above-mentioned conventional transmission
mechanism employs crank mechanism in coordination with torsion
spring to achieve oscillation action, the kinetic energy wastes for
no reason at all during the oscillation. The demerit of this
conventional transmission mechanism is that it wastes the power of
storage battery, and its oscillation motion is unsteady.
SUMMARY OF THE INVENTION
[0007] In order to resolve the big amount of waste of kinetic
energy of the driving mechanism of baby rocking chair, and to let
the range of oscillation maintain more steady, the invention makes
use of monitoring the oscillating state of the baby rocking chair
to control the rotation and counter-rotation of the transmission
motor so as to achieve the effect of steady oscillation of the
rocking chair. The invention is capable of making the driving
mechanism include a transmission system, a monitoring device, and a
control circuit. Among them, the transmission system includes a
transmission motor that can control the direction of rotation. When
the rocking chair oscillates upward and approaches a predetermined
set-up high point position that is affected by the gravitational
force causing the slowing dozen of rotating speed, the monitoring
device is capable of monitoring and transmitting a signal and
provides the control circuit with that signal. By the use of the
control circuit to switch the direction of the transmission motor
back and forth, the control circuit is capable of achieving the
effect of providing the power for driving the rotating shaft of the
rocking chair.
[0008] The accomplishment of this and other objectives and the
range of suitability of the application of the invention will
become apparent from the following description and its accompanying
drawings of which:
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] FIG. 1 is a schematic and isometric view of the mechanism of
the invention;
[0010] FIG. 2 is a schematic and exploded view of the members of
the invention;
[0011] FIG. 3 is a schematic and isometric view of the driving
mechanism of the invention;
[0012] FIG. 4 is a schematic view of the motor's rotating speed of
the invention;
[0013] FIG. 5 is a schematic view of the monitoring action control
of the invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0014] As shown in FIG. 1, 2, and 3, the embodiment of the driving
mechanism of baby rocking chair of the invention, basically, is a
mechanism mounted on a rocking chair framework (10) and is driven
to drive the rocking chair (20) by the use of electromagnetic
control. The embodiment includes a rocking chair framework (10) and
a pair of oscillating arms (11) that can connect to both sides
thereof. By the use of the oscillating arm (11) connected to the
rocking chair (20) and further by the use of a driving mechanism
(3) to drive the rocking chair connected to the pair of oscillating
arms (11), a certain range of oscillating motion is generated. The
driving mechanism (3) includes a case (30) having a controlling
push button (31), a rotating shaft (4), a transmission system (5),
and a monitoring device (6), wherein the case (30) is mounted on a
side of the rocking chair framework (10).
[0015] The above-mentioned rotating shaft (4) is either connected
to an end of the oscillating arm (11) or directly connected to the
rocking chair (20) in order to rotate the oscillating arm (11) to
oscillate or directly rotate the rocking chair (20) (or rocking
bed) to appear reciprocating oscillation.
[0016] The transmission system (5) includes a direct-current power
supply (51), a transmission motor (52), and a speed-reducing gear
train (53). In the present embodiment, the direct-current power
supply (51) can make use of storage battery to provide the power
supply required by the transmission motor (52). The speed-reducing
gear train (53) being equipped between an end of the transmission
motor (52) of a transmission shaft (521) and rotating shaft (4) has
the main purpose of reducing the rotating speed of the transmission
motor (52) to adapt to the oscillating rocking chair (20). In the
present embodiment, one end of the transmission shaft (521) of the
transmission motor (52) is connected to a rotating disk (54) that
rotates at the same speed following the transmission shaft (521) of
the transmission motor (52). In accordance with the invention, the
transmission motor (52) can employ the direct-current power supply
(51) to perform driving action. Affected by the gravitational
force, the speed of the transmission shaft (521) of the
transmission motor (52) gradually slows down when the oscillating
arm (11) is oscillating upward. As shown in FIG. 4, the rotating
speed is the lowest (almost approaches zero) when the rocking chair
(20) is oscillated up to the highest position (i.e. when the
oscillating range is at the highest point). In addition, the
rotating disk (54) provides embossed facets at equal space or
blades (541).
[0017] The monitoring device (6) for monitoring or calculating the
location or speed of the rotation of the rotating disk (54) is
mounted at a side of the rotating disk (54). In the present
embodiment, the monitoring device (6) is a light interrupter that
mainly provides the following two monitoring signals, 1. When the
light interruptor has monitored that the oscillating arm (11) has
reached the highest point, that is, when the rotating speed of the
rotating disk (54) (transmission motor) is the slowest, the light
interruptor provides a control circuit (7) with a first signal; 2.
The light interruptor is capable of monitoring and calculating the
number of the embossed facets or the blades (541) to provide the
control circuit (7) with a second signal.
[0018] As shown in FIG. 5, the control circuit (7) includes a
signal-receiving interface (71), a memory unit (IC) (72), a motor's
steering control circuit (73), and a motor's rotating speed control
circuit (74). Among them, the memory unit (72) mainly sets up the
rotating speed and rotating time of the transmission motor (52)
beforehand to make the oscillating arm (1.1) or rocking chair (20)
oscillate within a definite extent of range. The signal-receiving
interface (71) mainly receives the first and the second signals
provided by the monitoring device (6). Besides, the motor's
steering control circuit (73) mainly controls the rotation and
counter-rotation of the transmission motor (52) while the motor's
rotating speed control circuit (74) controls the raising or
lowering of the current in order to control steadily the rotating
speed of the transmission motor (52).
[0019] By the use of the above-mentioned structural members, the
memory unit (72) of the control circuit (7) sets up beforehand the
rotating time of the transmission motor (52) and the rotating range
of the rotating disk (54). This is to make the oscillating arm (11)
or the rocking chair (20) oscillates within the predetermined range
through the speed-reducing gear train (53) and the rotating shaft
(4). Affected by the gravitational force, as the transmission motor
(52) rotates and drives the transmission motor (52) or oscillating
arm (11) up to the highest point, the rotating speed of the
transmission motor (52) is the lowest. At this moment, monitoring
the rotating speed, the monitoring device (6) transmits the first
signal to the signal-receiving interface (71) of the control
circuit (7). Then, the signal-receiving interface (71) provides the
signal and switches the rotation direction of the transmission
motor (52) into counter-rotation through the motor's steering
control circuit (73). As the transmission motor (52) counter
rotates to the opposite oscillating highest point, the monitoring
device (6) makes the transmission motor (52) generate rotation
again following the above-mentioned sequence. Following this kind
of cycle, the monitoring device (6) is capable of making the
rocking chair (20) or oscillating arm (11) oscillates back and
forth within a predetermined range.
[0020] In addition, in the present embodiment, the memory unit (72)
sets up the range of the rotating disk (54) beforehand, and the
monitoring device (6) (i.e. the light interrupter) calculates the
rotation range of the rotating disk (54) through the number of the
embossed facets or the blades (541) on the rotating disk (54). As
the rotation range of the rotating disk (54) is either insufficient
or exceeded the predetermined set-up value, i.e. the predetermined
oscillating position of the rocking chair (20) or oscillating arm
(11), the monitoring device (6) transmits the second signal to the
signal-receiving interface (71) of the control circuit (7). By the
use of the motor's rotating speed control circuit (7) to output a
relatively higher current or to lower the current, the rotating
disk (54) of the transmission motor (52) can restore back to the
original predetermined rotational position. It is by this way that
the rocking chair (20) or oscillating arm (11) can achieve the
effect of steady oscillation.
[0021] In the present embodiment, the memory unit (72) of the
control circuit (7) is capable of setting a multiple sets of set-up
value to make the rocking chair (20) of the invention possess a
multi-stage oscillation for the users to select their options.
[0022] It will become apparent to those people skilled in the art
that various modifications and variations can be made to the
mechanism of the invention without departing from the scope or
spirit of the invention. In view of the foregoing description, it
is intended that all the modifications and variation fall within
the scope of the following appended claims and their
equivalents.
* * * * *