CN101500455A

CN101500455A - Chair

Info

Publication number: CN101500455A
Application number: CNA2007800300540A
Authority: CN
Inventors: 小田洋一郎; 原永祐
Original assignee: Okamura Manufacturing Co Ltd
Current assignee: Okamura Manufacturing Co Ltd
Priority date: 2006-06-12
Filing date: 2007-06-11
Publication date: 2009-08-05
Anticipated expiration: 2027-06-11
Also published as: CA2655276C; WO2007145170A1; EP2033541A1; JP4964506B2; JP2007330337A; CA2655276A1; EP2033541A4; CN101500455B; US20090195043A1

Abstract

A chair in which a backrest can be largely tilted rearward within a small rotation angle range without increasing the heights of a leg body and a seat body. The leg body (1) includes a pair of left and right side-legs (9) of angular shape in side view, each having a front leg (9a) tilting forward and downward and a rear leg (9b) tilting backward and downward. The lower end of a backrest support frame (3) is so pivotally mounted on the leg body (1) at an appropriate position under the seat body (2) as to be capable of tilting rearward between the left and right side-legs (9).

Description

Chair

Technical field

The present invention relates to a kind of chair, in this chair, backrest pivotally is installed on a pair of shank, and seat support is supported by the supporting seat on the side leg.

Background technology

JP2002-282077A, JP2004-16516A, JP2004-33449A and JP2005-177180A disclose this chair.

In the chair in JP2002-282077A and JP2004-16516A, lower end that can sweptback backrest pivotally is installed on shank at the height that approximately equates near the rear end of seat support.The radius of gyration of upper end is restricted from the pivot to the backrest.

This has increased the angle of rotation when backrest recedes.For backrest is significantly tilted, must rising shank and seat support.

In JP2002-282077A, the lower end of backrest pivotally is installed on shank in the rear end of seat support.When backrest recedes, the space that chair is elongated and needs are big.

In JP2004-16516A, can significantly tilt for making backrest, backrest is run-off the straight after by bindiny mechanism's lifting.This complex structure has also increased the number of parts and annex.

In described file, the right leg and the left leg that support seat support are parallel to each other in plane and front view.Seat support is supported between the shank, and near to or in contact with the inner surface of shank, this makes chair lack lateral stability simultaneously.

In JP2004-33449A and JP2005-177180A, seat support is supported by the supporting seat of shank upper end, and pivotally install the lower end of backrest.Even shank is reduced to limit inferior by lowering or hoisting gear, also can not be reduced to supporting seat or be reduced to the seat support that supports by supporting seat.Fail to provide a kind of people can be sitting in wherein lower high inclination-angle chair with comfortable posture.

The supporting seat that is used to support seat support is arranged on the top of shank.Even at lower end edge four or five shanks are installed radially, chair also can become not steady with people's posture.

Summary of the invention

In view of these shortcomings, the purpose of this invention is to provide a kind of chair, in this chair, shank and seat support are in low level and have big inclination angle, make chair more steady.

Another object of the present invention provides a kind of chair, and in this chair, backrest significantly tilts backward with little angle of rotation, and this chair has reduced rearwardly projecting distance and realized comfortable sitting posture.

Description of drawings

Fig. 1 is the front perspective view according to chair of the present invention.

Fig. 2 is its front view.

Fig. 3 is its side view.

Fig. 4 is the side view of chair when backrest inclination.

Fig. 5 is its rearview.

Fig. 6 is the stereogram of shank unit.

Fig. 7 is its vertical view.

The specific embodiment

Chair 1 comprises: shank unit 1; Seat support 2 by 1 support of shank unit; Back support frame 3, this framework 3 pivotally is installed on shank unit 1 at lower front end; Backrest 6, it comprises the backboard 4 and the liner 5 of mesh; And a pair of rhombus handrail 7 that is positioned at the bottom of back support frame 3.

In Fig. 6 and Fig. 7, shank unit 2 comprises: a

contralateral leg

9,9, each side leg comprise that all front end has the front leg portions 9a of caster 8 and the back shank 9b that the rear end has caster 8, and back shank is longer than front leg portions 9a; And the connecting elements between the upper end of

side leg

9 and 9 10.

The back shank 9b reason longer than front leg portions 9a is to keep chair more steady when backrest 6 recedes.

It is big that the front leg portions 9a of side leg 9 and the distance between the 9a become forward gradually, and the distance between back shank 9b and the 9b becomes big backward gradually, thereby make that shank unit 1 is more steady.

Formed minor axis 11 with the upper end of each side leg 9.In Fig. 3, installed part 12 is outstanding downwards from the inner surface of the front end of back shank 9b.

The upper end of a pair of vertical portion 10a, the 10a of connecting elements 10 engages with minor axis 11 by bolt 13.The cross bar 10b that is arranged on 10a rear, vertical portion engages with installed part 12 by bolt 13.

The head that is arranged on the bolt 13 in the minor axis 11 hides by the circular cap 14 in the sidepiece groove that is installed in minor axis 11 (not shown among Fig. 5).

The supporting seat 15 that is used to support seat support 2 is fixed in the protuberance 10c at the cross bar 10b middle part of connecting elements 10 by bolt 16 in the rear end, make that the front end of supporting seat 15 is outstanding in the place ahead of cross bar 10b.

The vertical portion 10a of U-shaped connecting elements 10 is fixed in the top of side leg 9 in the upper end, and cross bar 10b is fixed in the installed part 12 of back shank 9b, makes the upper end of supporting seat 15 a little more than the top of side leg 9.

In Fig. 3 and Fig. 5, back support frame 3 stands on the rear end of seat support, and it comprises: a pair of

side frame

17,17, and each

side frame

17,17 all has the arm 17a that is positioned at the lower end, the oblique rear-inclined of described arm 17a; Arch top frame 18 with the upper end that is connected described

side frame

17,17.

Distance between right side frame 17 and the left side frame 17 is shorter than the right back shank 9b and the distance between the left back shank 9b of a described contralateral leg 9.When back support frame 3 receded,

arm

17a, 17a did not engage with

back shank

9b, 9b.

In Fig. 6, all be formed with rounded portions 17b at the front end of each arm 17a, described rounded portions 17b is almost coaxial with the minor axis 11 at side leg 9 tops.Rounded portions 17b pivotally is connected in the torsional axis (not shown) in the supporting seat 15, and as the known rubber twist cell of recline mechanism, it is all stressed in the counterclockwise direction always simultaneously.Therefore, when the people who is seated promoted backrest 6 backward, back support frame 3 receded around supporting seat 15 with the backrest 6 that is installed on support frame 3.

In Fig. 3 and Fig. 6, a pair of seat

support support link

20,20 pivotally is installed on the outstanding laterally cylindrical support member 19 of self-supporting seat 15 by pivot 21.

Seat

support support member

22,22 projects upwards from the front end of the arm 17a of back support frame 3.The handrail installation portion 23 and the seat support support member 22 of rectangle given prominence to the upper surface at arm 17a.

As shown in Figure 3, the chair base frame 24 that is installed on the lower surface of seat support 2 pivotally is installed on the upper end of seat support support link 20 at front end, and pivotally is installed on the upper end of seat support support member 22 by pivot 26 in the rear end.

Therefore, the front portion of seat support 2 is supported by the supporting seat 15 that links with shank unit 1 by seat support support link 20, and the middle part of seat support 2 is supported by the arm 17a of seat support support member 22 by back support frame 3.

Therefore, in Fig. 4, when back support frame 3 and backrest 6 receded, seat support 2 receded together.After seat support 2 had been assembled, the front portion of the rear portion of front leg portions 9a and back shank 9b was positioned at the lateral edges of seat support 2, made side leg 9 side direction outstanding (referring to Fig. 2) not of shank unit 1.

As mentioned above, in embodiment according to chair of the present invention, back support frame 3 pivotally is installed on the supporting seat 15 that is connected in shank unit 1 at lower front end, thereby has increased the radius of gyration of 3 upper ends and backrest 6 upper ends from the pivot to the back support frame.Therefore, backrest 6 can tilt to a greater degree with little angle of rotation, and can make outstanding minimizing backward.

This chair can recede under the condition of the height that does not increase shank unit 1 and seat support 2 on a large scale, thereby a kind of comfortable low chair of the inclined that retreats that takes a seat is provided.

In said embodiment, the front end of the front end of back support frame 3 and seat support 2 is at the supporting seat 15 that pivotally is installed on the cross bar 10b of connecting elements 10.Supporting seat 15 is the same with the top of side leg 9 high, thereby has reduced taking a seat height and having improved comfort of user.

The arm 17a of back support frame 3 is longer relatively, and makes progress below seat support 2 and recede.Arm 17a pivotally is installed in the position contour substantially with the top of side leg 9, thereby has increased the angle of rotation of arm 17a and avoided the rear end of arm 17a to contact with the floor.

Distance between distance between front leg portions 9a and the 9a and back shank 9b and the 9b becomes big forward and backward respectively, and back shank 9b is longer than front leg portions 9a, thereby keeps chair more steady when backrest 6 recedes.

Because the distance between front leg portions 9a and the 9a becomes forward greatly, so the people's who is seated lower limb can not met front leg portions 9a.

In aforementioned embodiments, the arm 17a of back support frame 3 pivotally is installed on supporting seat 15, but also can pivotally be installed on the top of side leg or the inner surface of minor axis.

In aforementioned embodiments, seat support 2 tilts with back support frame 3, but seat support 2 also can be fixed on the top of the shank unit that comprises supporting seat.

Claims

1. chair, in this chair, the back support frame that has backrest on front surface pivotally is installed on the shank unit that supports seat support, makes described support frame to recede from the erection position at described seat support rear, and described chair is characterised in that:

Described shank unit comprises a contralateral leg, each described side leg all has front leg portions and the sweptback back shank that turns forward, the lower end of described back support frame pivotally is installed on described shank unit below described seat support, make the lower end of described back support frame recede between leg portion and left legportion.

2. chair as claimed in claim 1 wherein, is provided with a pair of arm in the lower end of described back support frame, and the front end of described arm pivotally is installed on described shank unit in the overhead height position about equally with described side leg.

3. chair, in this chair, seat support is supported by the supporting seat on the shank unit, and described chair is characterised in that:

Described chair comprises: a pair of outstanding side leg, described side leg comprise front leg portions and the sweptback back shank that turns forward; The connecting elements that connects the top of described side leg; And the supporting seat that is positioned at the upper surface at described connecting elements middle part.

4. chair as claimed in claim 3, wherein, described connecting elements takes the shape of the letter U and has vertical part at the side of cross bar, is provided with supporting seat on the upper surface of described cross bar, and the apparent surface at the top of described side leg is fixed in the upper end of described vertical part.

5. chair as claimed in claim 4, wherein, described vertical part forward and extend upward makes described cross bar near the top of described side leg is positioned at described back shank.

6. as each described chair in the claim 3 to 5, wherein, the front end of a pair of arm of bottom that has the described back support frame of described backrest on front surface pivotally is installed on the sidepiece of described supporting seat, makes described back support frame to recede.

7. chair as claimed in claim 6, wherein, the front portion of described supporting seat is outstanding forward from the top of described side leg, the right side lower surface of the front end of described seat support and left side lower surface pivotally are installed on the right side and the left side of its front end by the sidepiece pivot, pivotally are installed on the arm of described back support frame by the sidepiece pivot near the lower surface of the sidepiece at the rear portion of described seat support.

8. as each described chair in the claim 1 to 7, wherein, the distance between the back shank of described side leg becomes big gradually.

9. as each described chair in the claim 1 to 8, wherein, it is big that the distance between the front leg portions of described side leg becomes gradually.

10. as each described chair in the claim 1 to 9, wherein, described side leg is a bending, and simultaneously described back shank is than described foreleg minister.

11. as each described chair in the claim 1 to 10, wherein, the front portion of the rear portion of described front leg portions and described back shank is positioned at the sidepiece of described side leg below described seat support.

12., wherein, be provided with caster at the front end of the front leg portions of described side leg and the rear end of back shank as each described chair in the claim 1 to 11.