U.S. patent application number 09/738659 was filed with the patent office on 2002-06-13 for chair adjustment device.
Invention is credited to Liu, Gen-Fong.
Application Number | 20020070597 09/738659 |
Document ID | / |
Family ID | 24968929 |
Filed Date | 2002-06-13 |
United States Patent
Application |
20020070597 |
Kind Code |
A1 |
Liu, Gen-Fong |
June 13, 2002 |
Chair adjustment device
Abstract
A chair adjustment device has a U-shaped frame, a first
connection plate having a first round hole, a first circular
aperture, and a second circular aperture, a second connection plate
having a second round hole, a first driven block having a through
hole, a protruded bar, and a protrusion, and a second driven block
having a through aperture. A shaft passes through the through
aperture, the second round hole, the first round hole, and the
through hole. A click gear is disposed in the first driven block. A
click pawl has a first round aperture and a second round aperture.
A compression spring is inserted in the circular aperture and the
first round aperture. A rivet passes through the first circular
aperture and the second round aperture. The click pawl engages with
the click gear.
Inventors: |
Liu, Gen-Fong; (Taichung,
TW) |
Correspondence
Address: |
Gen-Fong Liu
58, MA YUAN WEST ST.
TAICHUNG
TW
|
Family ID: |
24968929 |
Appl. No.: |
09/738659 |
Filed: |
December 13, 2000 |
Current U.S.
Class: |
297/408 ;
297/411.38 |
Current CPC
Class: |
A47C 1/03 20130101; A47C
7/38 20130101; A47C 1/0308 20180801 |
Class at
Publication: |
297/408 ;
297/411.38 |
International
Class: |
A47C 007/36; A47C
007/54 |
Claims
I claim:
1. A chair adjustment device comprises a U-shaped frame, a first
connection plate disposed on a first side of the U-shaped frame, a
second connection plate disposed on a second side of the U-shaped
frame, a first driven block covering the first connection plate,
and a second driven block covering the second connection plate, the
first connection plate having a first round hole, a first circular
aperture, and a second circular aperture, the second connection
plate having a second round hole, the first driven block having a
through hole, a protruded bar, and a protrusion, the second driven
block having a through aperture, a shaft passing through the
through aperture of the second driven block, the second round hole
of the second connection plate, the first round hole of the first
connection plate, and the through hole of the first driven block, a
click gear disposed in the first driven block, a click pawl having
a first round aperture and a second round aperture, a compression
spring having a first end inserted in the circular aperture of the
first connection plate and a second end inserted in the first round
aperture of the click pawl, a rivet passing through the first
circular aperture of the first connection plate and the second
round aperture of the click pawl to fasten the first connection
plate and the click pawl together, and the click pawl engaging with
the click gear.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to a chair adjustment device.
More particularly, the present invention relates to a chair
adjustment device which is operated easily.
[0002] A conventional chair adjustment device is connected to an
air cylinder. However, it is cumbersome to operate the conventional
chair adjustment device.
SUMMARY OF THE INVENTION
[0003] An object of the present invention is to provide a chair
adjustment device which is operated easily.
[0004] Accordingly, a chair adjustment device comprises a U-shaped
frame, a first connection plate disposed on a first side of the
U-shaped frame, a second connection plate disposed on a second side
of the U-shaped frame, a first driven block covering the first
connection plate, and a second driven block covering the second
connection plate. The first connection plate has a first round
hole, a first circular aperture, and a second circular aperture.
The second connection plate has a second round hole. The first
driven block has a through hole, a protruded bar, and a protrusion.
The second driven block has a through aperture. A shaft passes
through the through aperture of the second driven block, the second
round hole of the second connection plate, the first round hole of
the first connection plate, and the through hole of the first
driven block. A click gear is disposed in the first driven block. A
click pawl has a first round aperture and a second round aperture.
A compression spring has a first end inserted in the circular
aperture of the first connection plate and a second end inserted in
the first round aperture of the click pawl. A rivet passes through
the first circular aperture of the first connection plate and the
second round aperture of the click pawl to fasten the first
connection plate and the click pawl together. The click pawl
engages with the click gear.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] FIG. 1 is a schematic view illustrating two chair adjustment
devices disposed in a chair;
[0006] FIG. 2 is a perspective exploded view of a chair adjustment
device of a first preferred embodiment in accordance with the
present invention;
[0007] FIG. 3 is a perspective assembly view of a chair adjustment
device of a first preferred embodiment in accordance with the
present invention;
[0008] FIG. 4 is a perspective assembly view of a chair adjustment
device of a second preferred embodiment in accordance with the
present invention;
[0009] FIG. 5 is a schematic view illustrating a first operation of
a chair adjustment device of a first preferred embodiment in
accordance with the present invention;
[0010] FIG. 6 is a schematic view illustrating a second operation
of a chair adjustment device of a first preferred embodiment in
accordance with the present invention;
[0011] FIG. 7 is a schematic view illustrating a third operation of
a chair adjustment device of a first preferred embodiment in
accordance with the present invention; and
[0012] FIG. 8 is a schematic view illustrating a fourth operation
of a chair adjustment device of a first preferred embodiment in
accordance with the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0013] Referring to FIGS. 1 to 3 and FIGS. 5 to 8, a first chair
adjustment device comprises a U-shaped frame 1, a first connection
plate 3 disposed on a first side of the U-shaped frame 1, a second
connection plate 3a disposed on a second side of the U-shaped frame
1, a first driven block 4 covering the first connection plate 3,
and a second driven block 18 covering the second connection plate
3a.
[0014] The first connection plate 3 has a first round hole 14, a
first circular aperture 12, and a second circular aperture 17.
[0015] The second connection plate 3a has a second round hole
14a.
[0016] The first driven block 4 has a through hole 2, a protruded
bar 5, and a protrusion 6.
[0017] The second driven block 18 has a through aperture 16.
[0018] A shaft 15 passes through the through aperture 16 of the
second driven block 18, the second round hole 14a of the second
connection plate 3a, the first round hole 14 of the first
connection plate 3, and the through hole 2 of the first driven
block 4.
[0019] A click gear 7 is disposed in the first driven block 4.
[0020] A click pawl 8 has a first round aperture 9 and a second
round aperture 11.
[0021] A compression spring 10 has a first end 101 inserted in the
circular aperture 17 of the first connection plate 3 and a second
end 102 inserted in the first round aperture 9 of the click pawl
8.
[0022] A rivet 13 passes through the first circular aperture 12 of
the first connection plate 3 and the second round aperture 11 of
the click pawl 8 to fasten the first connection plate 3 and the
click pawl 8 together.
[0023] The click pawl 8 engages with the click gear 7.
[0024] The U-shaped frame 1 is connected to a chair support frame
30 in a chair.
[0025] The first chair adjustment device is a headpiece adjustment
device 19.
[0026] Referring to FIGS. 5 to 7 again, the click pawl 8 moves from
the protruded bar 5 to the click gear 7.
[0027] Referring to FIG. 8 again, the click pawl 8 disengages from
the click gear 7 and engages with the protrusion 6.
[0028] FIG. 4 shows a second chair adjustment device as an armrest
adjustment device 20.
[0029] The invention is not limited to the above embodiment but
various modification thereof may be made. Further, various changes
in form and detail may be made without departing from the scope of
the invention.
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