U.S. patent application number 12/509461 was filed with the patent office on 2011-01-27 for chair with pre-stressing structure.
Invention is credited to Wen-Shan KO.
Application Number | 20110018322 12/509461 |
Document ID | / |
Family ID | 49881149 |
Filed Date | 2011-01-27 |
United States Patent
Application |
20110018322 |
Kind Code |
A1 |
KO; Wen-Shan |
January 27, 2011 |
CHAIR WITH PRE-STRESSING STRUCTURE
Abstract
The present invention provides a chair with a pre-pressing
structure. The chair includes a main body and pre-pressing
structure. The pre-pressing structure includes a permanent seat,
pre-pressing member and pivoted seat. The permanent seat is
arranged onto the assembly surface of the backing plate, and the
pre-pressing member is assembled therein. The multi-segment
directional groove of the pivoted seat is interlocked with the
multi-segment directional bulge of the pre-pressing member, so that
the circular elastic member of the pre-pressing member can obtain a
torsional restoring force, allowing for pre-pressing and locating
via the pre-pressing locator. The pivoted seat is fitted with an
inserting portion for inserting into the support of the main
body.
Inventors: |
KO; Wen-Shan; (Qigu Shiang,
TW) |
Correspondence
Address: |
EGBERT LAW OFFICES
412 MAIN STREET, 7TH FLOOR
HOUSTON
TX
77002
US
|
Family ID: |
49881149 |
Appl. No.: |
12/509461 |
Filed: |
July 25, 2009 |
Current U.S.
Class: |
297/300.2 |
Current CPC
Class: |
A47C 7/448 20130101 |
Class at
Publication: |
297/300.2 |
International
Class: |
A47C 1/024 20060101
A47C001/024; A47C 3/00 20060101 A47C003/00 |
Claims
1. A chair comprising: a main body, being comprised of a backing
plate with an assembly surface and supports; a pre-pressing
structure being fitted in said main body, said main body having an
elastic restoring force, said pre-pressing structure comprising: a
permanent seat, arranged onto the assembly surface of the backing
plate, said permanent seat being provided with a chamber; a
pre-pressing member, assembled into the chamber of said permanent
seat, said pre-pressing member containing a limiting seat, a
circular elastic member and a multi-segment directional bulge; a
pivoted seat, being provided with a multi-segment directional
groove that is interlocked with a multi-segment directional bulge,
said circular elastic member having a torsional restoring force;
and a pre-pressing locator, wherein said pivoted seat is fitted
with an inserting portion inserted into a support of said main
body.
2. The chair defined in claim 1, wherein said pre-pressing locator
is arranged onto the locating bulge of the limiting seat and also
into an embedding groove of the pivoted seat, said embedding groove
having a width bigger than a width of the locating bulge, along
with an angle difference, the locating bulge being embedded into
the embedding groove forming a tilting space.
3. The chair defined in claim 1, wherein the multi-segment
directional bulge and multi-segment directional groove have a
crisscrossed or polygonal shape.
4. The chair defined in claim 1, wherein the backing plate is
applied to a seat back or a seat cushion.
Description
CROSS-REFERENCE TO RELATED U.S. APPLICATIONS
[0001] Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
[0002] Not applicable.
NAMES OF PARTIES TO A JOINT RESEARCH AGREEMENT
[0003] Not applicable.
REFERENCE TO AN APPENDIX SUBMITTED ON COMPACT DISC
[0004] Not applicable.
BACKGROUND OF THE INVENTION
[0005] 1. Field of the Invention
[0006] The present invention relates generally to a chair, and more
particularly to an innovative chair with a pre-pressing structure
for extending service life thereof.
[0007] 2. Description of Related Art Including Information
Disclosed Under 37 CFR 1.97 and 37 CFR 1.98.
[0008] There are currently available a variety of chairs, which are
designed functionally to meet the requirements of ergonomics and to
improve convenience. Generally, the seat back is permanently
assembled with a seat cushion, so the users have to maintain a
fixed posture, leading to a lack of flexibility in practice. For
this problem, a chair with an elastic mechanism has been developed
recently; namely, an elastic mechanism is arranged between the seat
cushion and seat back, so that the seat back enables comfortable
and flexible seating via the torsional force of the elastic
mechanism.
[0009] Thus, to overcome the aforementioned problems of the prior
art, it would be an advancement in the art to provide an improved
structure that can significantly improve efficacy.
[0010] Therefore, the inventor has provided the present invention
of practicability after deliberate design and evaluation based on
years of experience in the production, development and design of
related products.
BRIEF SUMMARY OF THE INVENTION
[0011] There is enhanced efficacy of the present invention.
[0012] Based on the unique present invention, a chair is mainly
composed of the main body and pre-pressing structure. The
pre-pressing member's permanent seat is arranged onto the backing
plate's assembly surface of the main body, and the pre-pressing
member is assembled onto the pre-pressing member's permanent seat,
so that the main body presents elastic restoring force. Moreover,
the multi-segment directional bulge of the pre-pressing member is
correspondingly mated with the multi-segment directional groove of
the pivoted seat, so the circular elastic member of the
pre-pressing member can obtain a torsional restoring force, thereby
enhancing the structural strength, improving the durability and
extending the service life of the chair.
[0013] Although the invention has been explained in relation to its
preferred embodiment, it is to be understood that many other
possible modifications and variations can be made without departing
from the spirit and scope of the invention as hereinafter
claimed.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0014] FIG. 1 shows an assembled perspective view of the present
invention that the pre-pressing structure is applied to the
chair.
[0015] FIG. 2 shows an exploded perspective view of the
pre-pressing structure of the present invention.
[0016] FIG. 3 shows a top plan view of the present invention,
showing the pre-pressing structure assembled.
[0017] FIG. 4 shows a sectional view of the present invention,
showing the pre-pressing structure unassembled.
[0018] FIG. 5 shows a top plane view of the present invention,
showing the pre-pressing structure assembled.
[0019] FIG. 6 shows a sectional view of the present invention,
showing the pre-pressing structure assembled in two segments.
[0020] FIG. 7 shows a schematic view of the application of the
pre-pressing structure of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0021] FIGS. 1-4 depict preferred embodiments of a chair of the
present invention with pre-pressing structure. The embodiments are
provided for only explanatory purposes with respect to the patent
claims.
[0022] The chair comprises a main body 10, including at least a
backing plate 11 with an assembly surface 111 as well as supports
12. The main body 10 is fitted with a pre-pressing structure 20, so
that the main body 10 presents elastic restoring force.
[0023] The pre-pressing structure 20 comprises at least a
pre-pressing member's permanent seat 21, arranged onto the assembly
surface 111 of the backing plate 11. The pre-pressing member's
permanent seat 21 is provided with a chamber 210. The pre-pressing
member 20 also comprises at least a pre-pressing member 22,
assembled into the chamber 210 of the pre-pressing member's
permanent seat 21. The pre-pressing member 22 contains a limiting
seat 221, a circular elastic member 222 and a multi-segment
directional bulge 223.
[0024] The chair includes at least a pivoted seat 23, which is
provided with a multi-segment directional groove 233 that is
interlocked with the multi-segment directional bulge 223, so the
circular elastic member 222 can obtain a torsional restoring force.
Moreover, a pre-pressing locator 30 is used to realize a
pre-pressing locating. The pivoted seat 23 is fitted with an
inserting portion 234 for inserting into the support 12 of the main
body 10.
[0025] The pre-pressing locator 30 is arranged onto the locating
bulge 31 of the limiting seat 221 and also into an embedding groove
32 of the pivoted seat 23. The width of the embedding groove 32 is
bigger than that of the locating bulge 31, along with an angle
difference, so the locating bulge 31 can be forcibly turned to an
angle and embedded into the embedding groove 32 of the pivoted seat
23, thus forming a tilting space (shown in FIG. 7), and enabling
the users to swing flexibly within it ergonomically and
comfortably.
[0026] The backing plate 11 is applied to either of the seat back
or seat cushion of the chair 10. The present invention is applied
to the seat back of the chair 10 for providing elastic restoring
force.
[0027] The multi-segment directional bulge 223 and multi-segment
directional groove 233 are of a criss-crossed or polygonal
shape.
[0028] Based upon above-specified structures, the present invention
is operated as follows:
[0029] Referring to FIGS. 3, and 4, the limiting seat 221 of the
pre-pressing member 22 is embedded into the chamber 210 of the
pre-pressing member's permanent seat 21. In such a case, the
multi-segment directional bulge 223 is protruded from one side of
the limiting seat 221, next the multi-segment directional groove
233 of the pivoted seat 23 is inserted partially into the
multi-segment directional bulge 223, such that the other part of
the multi-segment directional bulge 223 is protruded out of the
pivoted seat 23(shown in FIG. 6(a)). In such a state, the locating
bulge 31 has an angle difference with the embedding groove 32.
Then, the pivoted seat 23 is turned anticlockwise to an angle, and
the multi-segment directional groove 233 will drive the
multi-segment directional bulge 223 to rotate anticlockwise,
enabling the anticlockwise rotation of the circular elastic member
222 in a pre-pressing state. In such a case, the locating bulge 31
is positioned correspondingly to the embedding groove 32, so that
the locating bulge 31 can be embedded into the embedding groove 32,
and the locating bulge 31 of the limiting seat 221 is driven to be
abutted onto one side of the embedding groove 32 via the circular
elastic member 222 (the locating bulge 31 is abutted onto left side
of the embedding groove 32 as shown in FIG. 7). Meanwhile the
multi-segment directional groove 233 is fully inserted into the
multi-segment directional bulge 223 (shown in FIG. 6(b)) for a
pre-pressing state (referring also to FIG. 5). Finally, the
inserting portion 234 is inserted into the support 12 of the main
body 10 for elastic assembly.
[0030] The pre-pressing structure 20 of the present invention is
assembled onto the seat back of the chair. In the practice, the
user sits on the seat cushion, when the seat back is tilted
backwards, the locating bulge 31 of the pre-pressing locator 30 is
rotated clockwise in line with the tilting angle, and the circular
elastic member 222 is driven to rotate for accumulating elastic
restoring force, allowing the seat back to swing within the tilting
space. When the user leaves from the seat back, the locating bulge
31 could drive the seat back for resetting via the elastic
restoring force of the circular elastic member 222. In such a way,
the user could sit on chair comfortably with tilting or swinging
functions. As the width of the embedding groove 32 is bigger than
that of the locating bulge 31, the tilting angle of the seat back
could be adapted to the size of the embedding groove 32 with angle
limitation (referring also to FIG. 7).
* * * * *