U.S. patent application number 11/833914 was filed with the patent office on 2008-02-07 for office chair with strengthened structure.
This patent application is currently assigned to Sumei Zheng. Invention is credited to Tung-Hsi Tai.
Application Number | 20080030057 11/833914 |
Document ID | / |
Family ID | 38745155 |
Filed Date | 2008-02-07 |
United States Patent
Application |
20080030057 |
Kind Code |
A1 |
Tai; Tung-Hsi |
February 7, 2008 |
Office Chair with Strengthened Structure
Abstract
Office chair with improved structure includes: chair back, seat
cushion, base frame, L-shaped connecting piece; among others, the
vertical part and transversal part of the connecting piece are
connected with the chair back and seat cushion respectively; there
is an cylinder rod in the middle of the base frame, it coordinates
with a handle to realize the lifting and dropping of the seat
cushion, the vertical part and transversal part of the connecting
piece are directly fixed at the back end of chair back and bottom
side of chair seat respectively; in addition, there is a fixing
hole coordinating with the top of cylinder rod at the corresponding
position of the middle of the seat cushion on the transversal part
of the connecting piece.
Inventors: |
Tai; Tung-Hsi; (Dongguan,
CN) |
Correspondence
Address: |
GLOBAL IP SERVICES
7285 W. Eagle Court
Winton
CA
95388
US
|
Assignee: |
Zheng; Sumei
Dongguan
CN
|
Family ID: |
38745155 |
Appl. No.: |
11/833914 |
Filed: |
August 3, 2007 |
Current U.S.
Class: |
297/300.4 ;
297/344.19 |
Current CPC
Class: |
A47C 7/004 20130101;
A47C 3/30 20130101 |
Class at
Publication: |
297/300.4 ;
297/344.19 |
International
Class: |
A47C 1/038 20060101
A47C001/038 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 4, 2006 |
CN |
200620062543.7 |
Claims
1. An office chair with strengthened structure including: a chair
back, a seat cushion, a base frame, a L-shaped connecting piece; a
vertical part and a transversal part of the L-shaped connecting
piece being connected with the chair back and the seat cushion
respectively; a cylinder with a cylinder rod in the middle of the
base frame, a piston bin in the cylinder work together with a
handle to realize the lifting and dropping of the seat cushion; the
vertical part and the transversal part of the L-shaped connecting
piece being directly fixed at the back end of chair back and bottom
side of chair seat respectively to avoid additional connection
means, thereby to create a strong connection between the L-shaped
connecting piece with the chair back and the chair seat; the
transversal part of the L-shaped connecting piece having a fixing
hole located in the middle of the seat cushion, The fixing hole
connecting the top of the cylinder rod firmly.
2. The office chair described in the claim 1, wherein the vertical
part and transversal part of the L-shaped connecting piece are
directly fixed with the chair back and seat cushion respectively by
screws.
3. The office chair described in the claim 2, wherein the width of
the transversal part of the L-shaped connecting piece is 1/3-1/4
width of the seat cushion and the length is 2/3 length of the seat
cushion.
4. The office chair described in the claim 3, wherein the material
of the L-shaped connecting piece is metal; the top of the cylinder
rod is directly inserted into the fixing hole in tight fit.
5. The office chair described in the claim 3, wherein the material
of the L-shaped connecting piece is wood, the fixing hole is
embedded a strengthening sleeve, the top of the cylinder rod is
inserted into the strengthening sleeve.
6. The office chair described in the claim 1, wherein there is a
connecting hole on the outer wall of the cylinder rod and a front
end of the handle is inserted into the cylinder rod through the
connecting hole to work together with a piston pin inside the
cylinder rod for control hoist and recede of the seat cushion.
7. The office chair described in the claim 5, wherein there is a
connecting hole on the outer wall of the cylinder rod and a front
end of the handle is inserted into the cylinder rod through the
connecting hole to work together with a piston pin inside the
cylinder rod for control hoist and recede of the seat cushion.
Description
CROSS REFERENCE TO RELATED PATENT APPLICATION
[0001] This application claims the priority of the Chinese patent
application No. 200620062543.7, Which was filed on Aug. 4,
2006.
FIELD OF THE INVENTION
[0002] This invention deals with the technology field of office
furniture, especially a type of office chair with the lift-and-drop
seat cushion.
BACKGROUND OF THE INVENTION
[0003] Office chair, especially the office chair with the
adjustable height, is one of the most widely used office equipment
at present; due to its adjustable height, its position can be
adjusted according to different requirements of people, which makes
it quite popular with the public. Diagram 1 shows the structure of
the office chair of this type at present, it includes: chair back
01, seat cushion 02, base frame 03 and L-shaped connecting piece
04; several support installed with rollers are molded on the outer
fringe of the base frame 03 and the cylinder rod 05 is set in the
middle of the base frame 03; a U-shaped chassis 06 is fixed at the
bottom side of the chair seat 02; the vertical part 041 of the
connecting piece 04 is fixed with the chair back 01 and a slender
bar member 043 is projected on the front end of the transversal
part 042; this slender bar member 043 is fixed on the chassis 06 by
screws and there is a run-through hole coordinating with the top of
cylinder rod 05 on the bottom of the chassis 06. The front end of
the handle 07 goes through the side of the chassis 06 to coordinate
the motion bar 08 of the cylinder rod 05, the motion bar 08 is
connected with a piston bin (not shown in the drawing) in the
cylinder rod 05, when push the handle 07 down, the motion bar 08
makes the piston bin action, thereby to adjust the height of the
chair seat 02.
[0004] With this structure, the height of the seat cushion 02 of
office chair can be adjusted; but it has the shortcomings of
complex structure, high production costs and inconvenient
installation for consumers. Furthermore, due to the fact that the
transversal part 042 of connecting piece 042 are connected to the
seat cushion 02 via the slender bar member 043 and chassis 06, the
intensity is insufficient; when the consumer is leaning on the
chair back 01 and rocking back and forth, the slender bar member
043 connecting the connecting piece 04 and chassis 06 is easy to be
broken, resulting in unusable chair, and even injury of the
user.
SUMMARY OF THE INVENTION
[0005] The objective of this invention is to provide a type of
office chair with improved structure in view of the shortage of the
present technology; it has the advantages of simple structure, low
production costs, easy assembly and good safety, etc.
[0006] To achieve the aforesaid goal, the office chair with
improved structure includes: chair back, seat cushion, base frame,
L-shaped connecting piece; among others, the vertical part and
transversal part of the connecting piece are connected with the
chair back and seat cushion respectively; there is a cylinder with
a cylinder rod in the middle of the base frame, a piston pin in the
cylinder rod work together with a handle to realize the lifting and
dropping of the seat cushion, the vertical part and transversal
part of the connecting piece are directly fixed at the back end of
chair back and bottom side of chair seat respectively; in addition,
there is a fixing hole coordinating with the top of cylinder rod at
the corresponding position of the middle of the seat cushion on the
transversal part of the connecting piece.
[0007] This invention simplifies the structure by adopting the
method of direct fixed connection between the transversal part of
the connecting piece and the seat cushion, which is convenient to
assemble and reduces production costs; in addition, it enhances the
connecting intensity between the transversal part of the connecting
piece and the seat cushion, which strengthened the stability of the
chair.
BRIEF DESCRIPTION OF THE INVENTION
[0008] FIG. 1 is the structure scheme of the present office
chair;
[0009] FIG. 2 is the structure scheme I of this invention;
[0010] FIG. 3 is the structure scheme II of this invention.
DETAIL DESCRIPTION OF THE INVENTION
[0011] The following is just one good example of the implementation
of this invention; it is not used to limit the protection scope of
this invention.
[0012] Please refer to the Attached Diagrams 2 and 3, this
invention includes: chair back 10, seat cushion 20, base frame 30
and connecting piece 40; there is a cylinder with a cylinder rod 50
fixed in the middle of the base frame 30.
[0013] The Connecting piece 40 is L-shaped, there are several screw
holes 401 on its vertical part 41 and transversal part 42
respectively, the vertical part 41 of the connecting piece 40 may
be directly fixed at the back end of the chair back 10 via the
screw hole 401, while the transversal part 42 is directly fixed at
the bottom side of the seat cushion 20. To guarantee the intensity
of the connecting piece 40, the width of the transversal part 42 of
the connecting piece 40 is 1/3 to 1/4 of that of the seat cushion
20 to enlarge the stressed area; and the length of the transversal
part 40 of the connecting piece 40 is approximately 2/3 of that of
the seat cushion 20.
[0014] Because the connecting piece 40 is molded in one piece, and
its vertical part 41 and transversal part 42 are fixedly connected
with chair back 10 and seat cushion 20 respectively, which makes
the seat back 10 and seat cushion 20 become one piece so this fixed
connection is very stable; when the consumer is leaning on the seat
back 10 and rocking back and forth, the stable connection between
the connecting piece 40 and seat cushion 20 can be guaranteed, and
the safety of this invention is enhanced.
[0015] A fixing hole 421 is arranged on the corresponding position
of the middle of the seat cushion 20 on the transversal part 42 of
the connecting piece 40, and the fixing hole 421 coordinates with
the top of the cylinder rod 50. The cylinder rod 50 supports the
connecting piece 40 and seat cushion 20, the connecting piece 40
and seat cushion 20 may move up and down with the cylinder rod 50.
The fixing hole 421 can be a run-through hole and the shape of it
matches with that of the top of the cylinder rod 50 so as to fix
the cylinder rod 50 firmly. The match between the fixing hole 421
and top of the cylinder rod 50 is tight fit. Metal or wood can be
adopted as the materials for the connecting piece 40; if wood is
adopted, a strengthening sleeve 43 can be nested in the fixing hole
421 on the transversal part 42 of the connecting piece 40, and the
shape of the casing of strengthening sleeve 43 matches with that of
the top of cylinder rod 50; during assembly, insert the top of
cylinder rod 50 into the casing of strengthening sleeve 43 to
increase the endurance of the fixing hole 421 against the top of
cylinder rod 50.
[0016] In order to make the cylinder rod 50 coordinate better with
the connecting piece 40 and seat cushion 20, this invention made
the following improvements on the structure of cylinder rod 50:
there is a connecting hole on the outer wall of cylinder rod (50)
and the front end of handle 51 is inserted into the connecting hole
to coordinate with a piston pin inside the cylinder rod (50).
Pushing the handle 51 against the piston pin inside the cylinder
rod 50 to control the upward and downward movements of the seat
cushion 20.
* * * * *