U.S. patent application number 15/157437 was filed with the patent office on 2017-09-28 for back adjusting and positioning structure of chair.
The applicant listed for this patent is Oasyschair Co., Ltd.. Invention is credited to Toshikazu Omori.
Application Number | 20170273462 15/157437 |
Document ID | / |
Family ID | 58766309 |
Filed Date | 2017-09-28 |
United States Patent
Application |
20170273462 |
Kind Code |
A1 |
Omori; Toshikazu |
September 28, 2017 |
Back Adjusting and Positioning Structure of Chair
Abstract
A back adjusting and positioning structure of a chair is
characterized in that: a backward tilt adjustment unit is disposed
at the junction of a cushion frame and a back frame of the chair so
that the backward tilt adjustment unit drives a screw segment with
one end thereof extending inward to retract and/or protrude a
blocking element coupled to a rear segment thereof in response to a
knob's rotating in a predetermined direction, so as to control
compression and/or expansion of a predetermined stop distance
acquired by a spring fitted in the backward tilt adjustment unit,
and in consequence the back in operation attains the required
tightening and/or loosening state.
Inventors: |
Omori; Toshikazu; (Tokyo,
JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Oasyschair Co., Ltd. |
Tainan City |
|
TW |
|
|
Family ID: |
58766309 |
Appl. No.: |
15/157437 |
Filed: |
May 18, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A47C 7/441 20130101;
A47C 7/44 20130101; A47C 7/02 20130101; A47C 7/443 20130101 |
International
Class: |
A47C 7/44 20060101
A47C007/44; A47C 7/02 20060101 A47C007/02 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 28, 2016 |
TW |
105109652 |
Claims
1. A back adjusting and positioning structure of a chair, adapted
for adjusting, including loosening and/or tightening, a back of the
chair, characterized in that: a backward tilt adjustment unit is
disposed at a junction of a cushion frame and a back frame of the
chair, and the backward tilt adjustment unit comprises a knob with
a screw segment extending therefrom, a spring for controlling the
resilience of the back, a blocking element for carrying the spring
to undergo inward and outward displacement, and a support element
abutting against a related segment of the cushion frame, wherein,
after a pad has been fitted into the screw segment extending from
the knob, guiding a support segment of the back frame into a pipe
segment, fitting a pad into the screw segment, and meshing a screw
nut with the screw segment so that the knob is confined to the
support segment of the back frame, wherein the screw segment
extending inside of the back frame guides in the blocking element
coupled to the screw nut so that the blocking element undergoes
predetermined inward and outward displacement along the screw
segment in response to the rotation of the knob, wherein the spring
is mounted on an inner side of the blocking element, and another
end of the spring is confined to a recess region attributed to the
support element and positioned proximate to the cushion frame, and
at least one concealment member is disposed within the range of
motion of the spring, wherein, to adjust the loosening and
tightening of the back, the backward tilt adjustment unit drives a
screw segment with an end thereof extending inward to retract
and/or protrude the blocking element coupled to a rear segment
thereof in response to the knob's rotating in a predetermined
direction, so as to control compression and/or expansion of a
predetermined stop distance acquired by a spring fitted in the
backward tilt adjustment unit, and in consequence the back in
operation attains a required tightening and/or loosening state.
2. The back adjusting and positioning structure of a chair
according to claim 1, wherein the concealment member disposed
within the range of motion of the spring included in the backward
tilt adjustment unit and adapted to control the resilience of the
back comprises an inner sleeve and an outer sleeve, with an inward
bent edge formed at an end of the inner sleeve to engage with a
protruding segment disposed at a related part of the back frame,
and an inward bent edge formed at an opposing end of the outer
sleeve to engage with an inward region attributed to the support
element and positioned proximate to the cushion frame, so that the
inner and outer sleeves and the range of motion of the spring
maintain a concealment state conducive to environmental
isolation.
3. The back adjusting and positioning structure of a chair
according to claim 1, wherein the concealment member is disposed
within the range of motion of the spring included in the backward
tilt adjustment unit and adapted to control the resilience of the
back, and a predetermined segment located inside of the inner
sleeve extends to form at least one bump so that a limit is placed
on the inward and outward displacement of the blocking element
coupled to a rear segment of the screw segment extending from an
end of the knob, thereby maintaining stable retraction and/or
protrusion.
4. The back adjusting and positioning structure of a chair
according to claim 2, wherein the concealment member is disposed
within the range of motion of the spring included in the backward
tilt adjustment unit and adapted to control the resilience of the
back, and a predetermined segment located inside of the inner
sleeve extends to form at least one bump so that a limit is placed
on the inward and outward displacement of the blocking element
coupled to a rear segment of the screw segment extending from an
end of the knob, thereby maintaining stable retraction and/or
protrusion.
5. The back adjusting and positioning structure of a chair
according to claim 1, wherein, when the blocking element which the
screw nut is coupled to is guided in along the screw segment
extending from an end of the knob included in the backward tilt
adjustment unit, a restriction portion meshes with an inner end of
the screw segment extending, so as to place a directional limit on
the retraction of the blocking element.
6. The back adjusting and positioning structure of a chair
according to claim 1, wherein a guidance application is disposed
between the inner sleeve and the outer sleeve of the concealment
member of the backward tilt adjustment unit, that is, two outer
sides at an end of the inner sleeve each extend to form a bump for
engaging with a recess disposed on an inner side of the outer
sleeve so as to maintain a stable concealment together with the
range of motion of the spring.
7. The back adjusting and positioning structure of a chair
according to claim 4, wherein a guidance application is disposed
between the inner sleeve and the outer sleeve of the concealment
member of the backward tilt adjustment unit, that is, two outer
sides at an end of the inner sleeve each extend to form a bump for
engaging with a recess disposed on an inner side of the outer
sleeve so as to maintain a stable concealment together with the
range of motion of the spring.
8. A back adjusting and positioning structure of a chair, wherein a
directional coupling of a cushion portion and the back of the chair
is characterized in that: the junction of the cushion frame and the
back frame of the chair extends to form supporting portions; holes
are penetratingly formed in the supporting portions at the junction
of the cushion frame and the back frame; after a spring has been
inserted into a pipe segment, thrusting segments are disposed along
two sides of the spring to abut against the pipe segment, outer
screw segments of the two thrusting segments are guided out of the
holes formed in the supporting portions at the junction of the
cushion frame and the back frame so that the directional mounting
and/or demounting of the back frame and the cushion frame achieves
quick positioning and/or removal by inserting and/or retracting the
two thrusting segments capable of appropriate resilient stop.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Technical Field
[0002] The present invention relates to a back adjusting and
positioning structure of a chair, characterized in that: to achieve
recumbent comfort and/or resilient tightening of a back of the
chair, a knob disposed at one end of an adjustment unit disposed
between the back and chair is rotated in a predetermined direction
to drive a spring therein to move out and/or in by a stop distance
in a predetermined state, thereby achieving anticipated loosening
and/or tightening application through simple operation.
[0003] 2. Description of Related Art
[0004] A chair can serve as a comfortable seat. To this end, a
movement adjustment mechanism is disposed at a related position of
the chair so that sitters of different body sizes make appropriate
directional adjustments to the chair to, for example, change chair
height or armrest height, move the chair forward, backward, inward
or outward, change the angle of inclination of the back of the
chair, or move the back forward or backward, so that timely dynamic
component adjustment is performed on the chair in operation. In
this regard, component adjustment is performed on the chair so that
the back thereof is appropriately loosened or tightened to recline.
The sitter tightens the back of the chair in order to be sedentary
or loosens the back of the chair in order to be recumbent (for
example, taking a nap.)
[0005] There are numerous applications of the aforesaid back
loosening and/or tightening adjustment. Taiwan patent 296580
discloses "Structural Improvement in Chair Regulator," including an
adjustment unit which comprises: a support plate disposed below a
chair and coupled to a base positioned proximate thereto; a screw
segment extending upward from a pneumatic rod and inserted into the
base at a predetermined position thereof to effectuate a
directional limit; and a spring coupled to the base at another
predetermined position thereof and from below so that the chair
always exhibits appropriate comfort and resilience, wherein an
engaging shaft penetrates the base laterally so that, to allow the
chair to loosen and thus recline, the engaging shaft can be pushed
inward to get free of the directional limit, thereby effectuating
predetermined loosening and reclination. Manipulating the engaging
shaft in the opposite way tightens the chair and thus precludes
reclination.
[0006] Although the application of the inclination angle adjustment
performed on the chair brings an anticipated loosening and/or
tightening state, the spring ends up with resilience fatigue after
long use and thereby loses its initial stronger resilience.
[0007] The present invention, which addresses the issue pertaining
to the resilience of an adjustment unit in the course of loosening
and/or tightening the back of the chair, is characterized in that:
to achieve recumbent comfort and/or resilient tightening of a back
of the chair, a knob disposed at one end of an adjustment unit
disposed between the back and chair is rotated in a predetermined
direction to drive a spring therein to move out and/or in by a stop
distance in a predetermined state, thereby achieving anticipated
loosening and/or tightening application through simple
operation.
BRIEF SUMMARY OF THE INVENTION
[0008] The application of the loosening and/or tightening of a back
of a chair is readily subjected to limitations and thus predisposed
to a loss of resilience because of resilience fatigue. In view of
this, the present invention is characterized in that: a backward
tilt adjustment unit is disposed at the junction of a cushion frame
and a back frame of the chair and adapted to drive the screw
segment with one end thereof extending inward to retract and/or
protrude a blocking element coupled to a rear segment thereof in
response to a knob's rotating in a predetermined direction, so as
to control compression and/or expansion of a predetermined stop
distance acquired by a spring fitted in the backward tilt
adjustment unit, and in consequence the back in operation attains
the required tightening and/or loosening state.
[0009] The first objective of the present invention is to provide a
back adjusting and positioning structure of a chair, adapted for
adjusting, including loosening and/or tightening, a back of the
chair, characterized in that: a backward tilt adjustment unit is
disposed at a junction of a cushion frame and a back frame of the
chair, and the backward tilt adjustment unit comprises a knob with
a screw segment extending therefrom, a spring for controlling the
resilience of the back, a blocking element for carrying the spring
to undergo inward and outward displacement, and a support element
abutting against a related segment of the cushion frame, wherein,
after a pad has been fitted into the screw segment extending from
the knob, guiding a support segment of the back frame into a pipe
segment, fitting a pad into the screw segment, and meshing a screw
nut with the screw segment so that the knob is confined to the
support segment of the back frame, wherein the screw segment
extending inside of the back frame guides in the blocking element
coupled to the screw nut so that the blocking element undergoes
predetermined inward and outward displacement along the screw
segment in response to the rotation of the knob, wherein the spring
is mounted on an inner side of the blocking element, and another
end of the spring is confined to a recess region attributed to the
support element and positioned proximate to the cushion frame, and
at least one concealment member is disposed within the range of
motion of the spring, wherein, to adjust the loosening and
tightening of the back, the backward tilt adjustment unit drives a
screw segment with one end thereof extending inward to retract
and/or protrude the blocking element coupled to a rear segment
thereof in response to the knob's rotating in a predetermined
direction, so as to control compression and/or expansion of a
predetermined stop distance acquired by a spring fitted in the
backward tilt adjustment unit, and in consequence the back in
operation attains the required tightening and/or loosening
state.
[0010] The second objective of the present invention is to provide
the concealment member disposed within the range of motion of the
spring included in the backward tilt adjustment unit and adapted to
control the resilience of the back comprises an inner sleeve and an
outer sleeve, with an inward bent edge formed at an end of the
inner sleeve to engage with a protruding segment disposed at a
related part of the back frame, and an inward bent edge formed at
an opposing end of the outer sleeve to engage with an inward region
attributed to the support element and positioned proximate to the
cushion frame, so that the inner and outer sleeves and the range of
motion of the spring maintain a concealment state conducive to
environmental isolation.
[0011] The third objective of the present invention is to provide
the concealment member disposed within the range of motion of the
spring included in the backward tilt adjustment unit and adapted to
control the resilience of the back, wherein a predetermined segment
located inside of the inner sleeve extends to form at least one
bump so that a limit is placed on the inward and outward
displacement of the blocking element coupled to a rear segment of
the screw segment extending from one end of the knob, thereby
maintaining stable retraction and/or protrusion.
[0012] The fourth objective of the present invention is as follows:
when the blocking element which the screw nut is coupled to is
guided in along the screw segment extending from one end of the
knob included in the backward tilt adjustment unit, a restriction
portion meshes with an inner end of the screw segment extending, so
as to place a directional limit on the retraction of the blocking
element.
[0013] The fifth objective of the present invention is as follows:
a guidance application is disposed between the inner sleeve and the
outer sleeve of the concealment member of the backward tilt
adjustment unit, that is, two outer sides at one end of the inner
sleeve each extend to form a bump for engaging with a recess
disposed on an inner side of the outer sleeve so as to maintain a
stable concealment together with the range of motion of the
spring.
[0014] The sixth objective of the present invention is to
effectuate the directional coupling of a cushion portion and the
back of the chair, characterized in that: the junction of the
cushion frame and the back frame of the chair extends to form
supporting portions; holes are penetratingly formed in the
supporting portions at the junction of the cushion frame and the
back frame; after a spring has been inserted into a pipe segment,
thrusting segments are disposed along two sides of the spring to
abut against the pipe segment, outer screw segments of the two
thrusting segments are guided out of the holes formed in the
supporting portions at the junction of the cushion frame and the
back frame so that the directional mounting and/or demounting of
the back frame and the cushion frame achieves quick positioning
and/or removal by inserting and/or retracting the two thrusting
segments capable of appropriate resilient stop.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0015] FIG. 1 is an exploded view of related components of a chair
back adjusting and positioning structure according to the present
invention;
[0016] FIG. 2 is a bottom perspective view of the chair back
adjusting and positioning structure when assembled according to the
present invention;
[0017] FIG. 3 is a lateral schematic view of the chair back
adjusting and positioning structure when assembled according to the
present invention;
[0018] FIG. 4 is a cross-sectional view taken along line 40-40 of
FIG. 3;
[0019] FIG. 4-1 is a front cross-sectional view of a back frame in
a secured state;
[0020] FIG. 4-2 is a front cross-sectional view of the back frame
in a separated state;
[0021] FIG. 5 is a bottom schematic view of the chair back
adjusting and positioning structure when assembled according to the
present invention;
[0022] FIG. 6 is a cross-sectional view taken along line 60-60 of
FIG. 5;
[0023] FIG. 6-1 is a partial enlarged view of FIG. 6;
[0024] FIG. 6-2 is a cross-sectional view of a back which reclines
in a loosened state of FIG. 6-1; and
[0025] FIG. 6-3 is a cross-sectional view of the back which
reclines in a tightened state of FIG. 6-1.
DETAILED DESCRIPTION OF THE INVENTION
[0026] Referring to FIG. 2, a back adjusting and positioning
structure of a chair, provided by the present invention, is for use
in adjusting, including loosening and/or tightening, a back 20 of a
chair 10 and is characterized in that a backward tilt adjustment
unit 7 (shown in FIG. 1) is disposed at the junction of a cushion
frame 1 and a back frame 2 of the chair 10. The backward tilt
adjustment unit 7 comprises a knob 3 with a screw segment 31
extending therefrom, a spring 4 for controlling the resilience of
the back 20, a blocking element 5 for carrying the spring 4 to
undergo inward and outward displacement, and a support element 6
abutting against a related segment of the cushion frame 1.
[0027] After a pad 32 has been fitted into the screw segment 31
extending from the knob 3, a pipe segment 33 guides in a support
segment 21 (shown in FIG. 6, FIG. 6-1) of the back frame 2. Then, a
pad 34 is fitted into the screw segment 31. Afterward, a screw nut
35 meshes with the screw segment 31 so that the knob 3 is confined
to the support segment 21 of the back frame 2. The screw segment 31
extending inside of the back frame 2 guides in the blocking element
5 coupled to a screw nut 51 so that the blocking element 5
undergoes predetermined inward and outward displacement along the
screw segment 31 in response to the rotation of the knob 3. The
spring 4 is mounted on the inner side of the blocking element 5.
The other end of the spring 4 is confined to a recess region
attributed to the support element 6 and positioned proximate to the
cushion frame 1. At least one concealment member 41 is disposed
within the range of motion of the spring 4.
[0028] The concealment member 41 is disposed within the range of
motion of the spring 4 included in the backward tilt adjustment
unit 7 and adapted to control the resilience of the back 20. The
concealment member 41 comprises an inner sleeve 42 and an outer
sleeve 43. An inward bent edge 421 is formed at one end of the
inner sleeve 42 to engage with a protruding segment 22 (shown in
FIG. 6-1) disposed at a related part of the back frame 2. An inward
bent edge 431 is formed at an opposing end of the outer sleeve 43
to engage with an inward region attributed to the support element 6
and positioned proximate to the cushion frame 1. Hence, the inner
and outer sleeves 42, 43 and the range of motion of the spring 4
maintain a concealment state conducive to environmental isolation.
Regarding the concealment member 41 disposed within the range of
motion of the spring 4 included in the backward tilt adjustment
unit 7 and adapted to control the resilience of the back 20, a
predetermined segment located inside of the inner sleeve 42 extends
to form at least one bump 422 (shown in FIG. 6-2) so that a limit
is placed on the inward and outward displacement of the blocking
element 5 coupled to a rear segment of the screw segment 31
extending from one end of the knob 3, thereby maintaining stable
retraction and/or protrusion. When the blocking element 5 which the
screw nut 51 is coupled to is guided in along the screw segment 31
extending from one end of the knob 3 included in the backward tilt
adjustment unit 7, a restriction portion 36 meshes with an inner
end of the screw segment 31 extending, so as to place a directional
limit (shown in FIG. 6-3) on the retraction of the blocking element
5. A guidance application is disposed between the inner sleeve 42
and the outer sleeve 43 of the concealment member 41 of the
backward tilt adjustment unit 7, that is, two outer sides at one
end of the inner sleeve 42 each extend to form a bump 423 for
engaging with a recess 432 disposed on an inner side of the outer
sleeve 43 so as to maintain a stable concealment together with the
range of motion of the spring 4.
[0029] The directional coupling (shown in FIG. 2, FIG. 3) of a
cushion portion and the back 20 of the chair 10 is characterized in
that: the junction of the cushion frame 1 and the back frame 2 of
the chair 10 extends to form supporting portions 11, 23 (shown in
FIG. 1, FIG. 4); holes 111, 231 (shown in FIG. 4-1) are
penetratingly formed in the supporting portions 11, 23 at the
junction of the cushion frame 1 and the back frame 2; after a
spring 82 has been inserted into a pipe segment 81, thrusting
segments 83 are disposed along two sides of the spring 82 to abut
against the pipe segment 81, outer screw segments of the two
thrusting segments 83 are guided out of the holes 111, 231 formed
in the supporting portions 11, 23 at the junction of the cushion
frame 1 and the back frame 2 so that the directional mounting
and/or demounting of the back frame 2 and the cushion frame 1
achieves quick positioning and/or removal by inserting (shown in
FIG. 4-1) and/or retracting (shown in FIG. 4-2) the two thrusting
segments 83 capable of appropriate resilient stop.
[0030] To adjust the loosening and tightening of the back 20 (shown
in FIG. 2, FIG. 3, FIG. 5), the backward tilt adjustment unit 7
disposed between the cushion frame 1 and the back frame 2 of the
chair 10 operates as follows: a user rotates the knob 3 of the
backward tilt adjustment unit 7 in a predetermined direction (shown
in FIG. 6-2) by hand to drive the inward-extending screw segment 31
to retract (shown in FIG. 6-3) and/or protrude (shown in FIG. 6-2)
the blocking element 5 coupled to the rear segment of the screw
segment 31, so as to control the compression and/or expansion of a
predetermined stop distance acquired by the spring 4 fitted in the
backward tilt adjustment unit 7, and in consequence the back 20 in
operation attains the required tightening and/or loosening
state.
* * * * *