CN100589737C

CN100589737C - Chair

Info

Publication number: CN100589737C
Application number: CN200710136339A
Authority: CN
Inventors: 中山健; 藤田寿人
Original assignee: Okamura Manufacturing Co Ltd
Current assignee: Okamura Corp; Okamura Manufacturing Co Ltd
Priority date: 2006-07-24
Filing date: 2007-07-24
Publication date: 2010-02-17
Anticipated expiration: 2027-07-24
Also published as: JP5015506B2; JP2008023192A; CN101112276A

Abstract

A chair, including legs, stanchions on the legs, a seat on the stanchion as well as backrest on the rear end of the seat. The back frame comprises an upper rod, a lower rod as well as a left rod and aright rod for connecting the upper rod and the lower rod. The backrest can be adjustable to move front and back. The back frame bends in the middle part.

Description

Chair

Technical field

The present invention relates to a kind of chair, it comprises the seat on the leg, and the backrest of rear end, seat, to allow backrest according to the body weight of seated person and bending.

Background technology

Be used for JP2,596, in the recliner of chair, come crooked backrest by bend arm among the 929Y2 according to the body weight of seated person.

But backrest itself only is along with described bend arm moves, and comfortable in order to keep taking one's seat, and backrest must have the cushion function.Bear the body weight of seated person though comprise the backrest of hardboard, not necessarily can bend, thereby can not realize enough adaptability.

When backrest moves forward, support member or backrest strut contact pillar.Seat does not have enough adjustment errors in the vertical.Make the chair size become big, support member must be outstanding to the chair back.

At JP2,596, in the recliner of 929Y2, the mounting portion must be wideer than support member, so its degraded appearance.Support member and mounting portion all will be formed with protuberance and groove, and it is difficult to processing and has increased manufacturing cost.

Summary of the invention

In view of the shortcoming of prior art, the purpose of this invention is to provide a kind of chair, it has made things convenient for the assembling and the processing of backrest, and the adaptability when keeping bearing the seated person body weight.

Another object of the present invention provides a kind of chair, and wherein backrest can move forward and backward on chair fully, and chair is not outstanding backward.

Another object of the present invention provides a kind of chair, wherein is used for simple in structure, the good looking appearance in mounting portion of backrest, makes chair cheap for manufacturing cost.

Description of drawings

Fig. 1 is the front perspective view that comprises according to the chair of the embodiment of back-rest means for chair of the present invention;

Fig. 2 is the rear perspective view of chair, so that mounting portion and backrest strut to be shown;

Fig. 3 is the vertical sectional view of chair, and wherein backrest is positioned at lower position;

Fig. 4 is the vertical sectional view of chair, and wherein backrest is positioned at the higher position;

Fig. 5 is the vertical longitudinal section side view of backrest chair when being positioned at lower position; And

Fig. 6 is the vertical longitudinal section side view of backrest chair when being positioned at the higher position; And

Fig. 7 is the sectional view along Fig. 6 center line A-A.

The specific embodiment

Among Fig. 1, chair 1 comprises seat 5 and backrest 6, and seat 5 is on the pillar 4 that is coupled to leg 4, and backrest 6 is positioned at the rear end at seat 5.Backrest 6 comprises back frame 10, backrest strut 11 and backrest covering member 12.By backrest strut 11 is installed to mounting portion 7, backrest 6 is connected to seat 5.The position of backrest 5 regulated with front and back move.

Among Fig. 3 and 4, the chair 1 in this embodiment uses for the children that growing up.Backrest 5 is oppressed by the body weight of seated person backward.Backrest 6 can move and the front and back slip with respect to seat 5, thereby the position of backrest 6 is regulated to be fit to the posture of seated person.

The lower end of pillar 4 is coupled to the upper end of leg 2, and leg 2 radially extends from pillar 4.In the end of leg 2, castor 3 rotations are moved on the floor to allow chair 1.The backrest 6 that is fixed to seat 5 is installed in the mode that the axis around pillar 4 pivots, and when seated person is sitting on the seat around this rotation.

Pillar 4 is telescopic, can be independent of the slip of the backrest of describing later 6 and regulate height to allow the seat 5 on the pillar 4.Exactly, the extension of the slip of backrest 6 and pillar 4 is carried out individually, thereby the position that allows to regulate respectively the height at seat 5 and backrest 6 is to adapt to children's growth.

To describe backrest 6 in detail below.Among Fig. 2, backrest 6 comprises back frame 10 and a pair of backrest strut 11.Back frame 10 comprises: upper boom 10a; Left and right

sides side lever

10b, 10b; Lower beam 10c; Intermediate openings K; Backrest covering member 12, the opening K of back frame 10 in its Closed Graph 1.Backrest strut 11 extends forward and is coupled to mounting portion 7 below the seat 5 from lower beam 10c.

Among Fig. 3 and 4, be provided with sweep 10d at the middle part of the left and right sides of each back frame 10

side lever

10b, 10b, crooked backward with the first half that allows sweep 10d.Backrest strut 11 with back frame 10 by molded as the plastics of flexible material and extend forward from lower beam 10c.

Because the back frame 10 of backrest 6 is molded with backrest strut 11, so be easier to processing.Back frame 10 comprises upper boom 10a, lower beam 10b and left and right sides bar 10c, 10c.Thereby, to compare with the back frame that does not have opening, the deflection that the load of seated person can be had

flexible bar

10a, 10b, 10c absorbs.

The left and right sides side lever 10b of back frame 10 is tapered towards upper boom 10a from lower beam 10c.Lower beam 10c and thicker than the left and right sides side lever 10b part of upper boom 10a and close upper boom 10a near the left and right sides side lever 10b part of lower beam 10c.Rigidity uprises towards lower beam 10c from sweep 10d, towards upper boom 10a step-down.When backrest 6 was loaded with seated person, the top of upper boom 10a and left and right sides side lever 10b may be crooked with increase cushion function, and the lower part of lower beam 10c and left and right sides side lever 10b is unlikely crooked.Especially, the part that lower beam 10c is connected to backrest strut 11 is born the heavy load in the backrest 6.

Back frame 10 broadens downwards gradually to allow

side lever

10b, 10b to become firmer downwards, and therefore, the bending that the body weight of seated person produces can reduce downwards.To the mounting portion 7 that is coupled to backrest strut 11, it is more not obvious that bending becomes, the therefore feasible height that can stably regulate backrest strut 11.

Then, backrest strut 11 comprises sloping portion 11a and extension 11b, sloping portion 11a tilts with angle θ ' with respect to the floor from the lower beam 10c of back frame 10, extension 11b extends from sloping portion 11a, with respect to the floor with less than the specific angle θ of 45 degree (θ '＞θ)--for example about 24 degree--tilt.Backrest 6 can move forward and backward, because extension 11b slides along the angle θ among Fig. 3.

When extension 11b slided before and after the θ of angle, the distance that moves in the vertical with backrest strut 11 molded back frames 10 was greater than the distance that vertically moves.Therefore, when using for the children that growing up, back frame 10 can be regulated backward.

In the present embodiment, the angle θ of extension 11b is set at 24 degree.When the relation between the height of the degree of depth that keeps seat 5 and back frame 10 meets JIS or Japanese Industrial Standards, can regulate the position of back frame 10 with respect to seat 5.When extension 11b moves forward to maximum position, the size conforms JIS No.2 of chair 1; When extension 11b moves backward to maximum position, the size conforms JIS No.5 of chair 1.

The angle θ of extended position 11b be not limited to about 24 the degree, but can be lower than 45 the degree, make back frame 11 move horizontally the distance greater than vertical displacement.

It is spaced apart from each other a pair of that the sloping portion 11a of backrest strut 11 and extension 11b are arranged to the left and right sides.Mounting portion 7 on the lower surface at seat 5 remains between right extension 11b and the left extension 11b.Two

backrest struts

11 and 11 are separated from each other, make that therefore the body weight of bearing seated person is stable with the installation process that backrest strut 11 is installed to mounting portion 7.Even fractional load is applied to one of them backrest strut 11 by seated person, wherein another backrest strut 11 also can support loads.

Backrest strut 11 moves forward and backward but can not contact pillar 4, thereby allows displacement longer.Sloping portion 11a is more oblique than extension 11b, makes chair 1 can not give prominence to backward, thereby rear appearance attractive in appearance is provided.

Extension 11b and sloping portion 11a are formed together to constitute backrest strut 11.The body weight of seated person can stably be supported by right backrest strut 11 and left backrest strut 11.And backrest strut 11 is easy to molded, simple in structure, good surface appearance is provided for backrest strut 11.

Sloping portion 11a is not limited to a pair of.Single sloping portion can be set, and can be extended out a pair of extension from sloping portion.

Back frame 10 extends below sweep 10d backward and downwards.When backrest 6 moved forward, the rear end at seat 5 was contained in by the bottom of back frame 10 and backrest strut 11 and forms in the sweep 13.Back frame 10 can move on seat 5.Thereby the zone of effectively taking one's seat at seat 5 is deployable to adapt to children's growth.

Describe with reference to the partial enlarged drawing among Fig. 5 and Fig. 7 below and how backrest strut 11 is installed in the mounting portion 7.In the 11b of the extension of backrest strut 11, engage protuberance 15 and extend in the vertical at inner surface 14 upper edge extension 11b.

On the upper surface that engages protuberance 15, laterally be formed with a plurality of engaging grooves 16.When seeing joint protuberance 15 from the side, the gentle line that engaging groove 16 forms shown in the partial enlarged drawing among Fig. 5.Engaging on the lower surface of protuberance 15, downward ledge 17 among Fig. 7 is being arranged at longitudinal extension.

Among Fig. 7, mounting portion 7 comprises: the metal device 18 on seat 5 lower surfaces; Matrix 20, it is fixed to metal device 18 with four bolts 19; Engagement member 21, it is between metal device 18 and matrix 20; And control member 22, it is used to move up and down engagement member 21.

The individual box that is installed between right extension 11b and the left extension 11b of matrix 20 pictures.Matrix 20 has composition surface 23, and composition surface 23 is bonded on and engages on the protuberance 15.The upwardly projecting portion 24 of matrix 20 engages with the downward ledge 17 that engages protuberance 15.

In the partial enlarged drawing of Fig. 5, be formed with in the matrix 20 and cut part 25, and engagement member 21 is arranged on and cuts in the part 25.Engagement member 21 comprises the inner surface 14 that is installed in extension 11b and the plate between the inner surface 14.

In the partial enlarged drawing of Fig. 5, on the lower surface of engagement member 21, engagement lugs 26 is bonded in the engaging groove 16 that engages protuberance 15.The shape of engagement lugs 26 is corresponding with engaging groove 16.

The engagement lugs 26 of engagement member 21 be bonded on one of them engage protuberance 15 vertically in the engaging groove 16 that forms, be bonded on simultaneously and engage in the left and right

sides engaging groove

16,16 of

protuberance

15,15 about a pair of.Be formed with recessed screwed hole 27 at the middle part of engagement member 21.

In Fig. 7, control member 22 comprises: convex thread 28, convex thread 28 are bonded in the recessed screwed hole 27 of engagement member 21; And the handle 29 of convex thread 28 lower ends.Swing handle 29 makes engagement member 21 to move up and down in matrix 20.Handle 29 is outstanding to 5 belows, seat.

In order to regulate backrest 6, swing handle 29 can move up engagement member 21.Thereby engagement lugs 26 is thrown off so that engage protuberance 15 and can be slided along composition surface from engaging groove 16.In this case, seated person is firmly grasped backrest 6 and with it forward and move down or backward and move up, the posture that makes backrest 6 can be arranged on seated person meets the position of the shape of backrest 6.

For fixing backrest 6, swing handle 29 moves down engagement member 21.Then, engagement lugs 26 is bonded in the engaging groove 16, allows to engage protuberance 15 and is fixed.

Engaging groove 16 forms the little curve of camber, and the shape of engaging groove 16 is corresponding to engagement lugs 26.Thereby,, can prevent that also engaging groove 16 from damaging even repeatedly engage with engaging groove 16 and throw off through long-time the use when engagement lugs 26.Even error occurs between engaging groove 16 and engagement lugs 26 when making backrest strut 11 and engagement member 21, engagement lugs 26 also can be bonded in the engaging groove 16 and loosening.In addition, the downward ledge 17 of backrest strut 11 engages to prevent backrest strut about 11 loosening with the upwardly projecting portion 24 of matrix 20.

In the mounting structure of the backrest 6 of chair 1, extension, left and

right sides

11b, 11b are arranged on the seat 5 times.Engage the vertical formation of

protuberance

15,15 along extension 11b,

11b.Composition surface

23,23 with engage

protuberance

15,15 sliding-contacts.Mounting portion 7 is narrower than

extension

11b, 11b, so that mounting portion 7 compactnesses, profile attractive in appearance to be provided.Mounting portion 7 is arranged on the seat 5 times, so mounting portion 7 more is difficult to present.The joint protuberance 15 of extension 11b and the composition surface of mounting portion 7 23,23 make extension 11b can be fixed to mounting portion 7, and have therefore reduced manufacturing cost.

Be formed with a plurality of engaging grooves 16 in joint protuberance 15 upper surfaces of extension 11b.Engagement member 21 comprises engagement lugs 26, about engagement lugs 26 can be bonded in two engaging grooves 16,16.Engagement member 21 is arranged on and engages on the protuberance 15.The control member 22 that is used to move up and down engagement member 21 is arranged in the mounting portion 7, therefore makes engagement lugs 26 1 engage with

engaging groove

16,16 surely and throws off, and makes 11,11 whiles of left and right sides backrest strut also necessarily be fixed to mounting portion 7.

The size of engagement member 21 forms and makes it can put in the width between

inner surface

14 and 14, makes it possible to reduce the width of mounting portion 7, and provides compact, attractive in appearance profile for mounting portion 7.

When seated person was children, children may operate the handle that is easy to touch.But in embodiments of the present invention, the handle 29 of control member 22 is arranged on the lower surface at seat 5, makes that children are difficult to operate handle unintentionally, thereby has prevented that backrest 5 from moving with respect to the seat.

With reference to description of drawings embodiments of the present invention, but detailed structure is not limited to described embodiment.Under the situation of the scope that does not break away from claims, can carry out different modification and remodeling.

Described embodiment relates to a kind of chair for children's use of growing up.Backrest strut and back frame with regard to backrest are molded together with flexible material, and chair can be used for office.

In the described embodiment, be provided with a pair of backrest strut in the middle of the lower beam of back frame, but also single backrest strut can only be set.

In the described embodiment, backrest strut 11 is molded with back frame 10 usefulness plastics.But the backrest strut can separate and can be connected to the centre of back frame lower beam from back frame.

Claims

1. chair comprises:

The leg body;

Stand in the pillar on the described leg body;

Seat on the described pillar; And

Backrest, it comprises the back frame of rear end, described seat and the backrest strut that at least one extends forward from the lower end of described back frame, the middle part of described back frame height is formed with sweep, described backrest strut is fixed to described seat to allow described backrest strut forward and downwards or backward and move up, described backrest strut comprises sloping portion and a pair of extension, described sloping portion turns forward from the lower end of described back frame, described extension tilts slightly little than sloping portion, become the angle of spending less than 45 with respect to floor surface, slide before and after the described extension to change the position of described backrest, when described backrest strut during to front slide, described pillar is arranged between the described a pair of extension.

2. chair as claimed in claim 1, also comprise the backrest covering member, described back frame comprises upper boom, lower beam and left and right side lever, described left and right side lever is connected to described lower beam to form opening among described four bars with described upper boom, described opening is sealed by described backrest covering member, and described backrest strut is molded by flexible material with described back frame.

3. chair as claimed in claim 1, also comprise the mounting portion, between the described a pair of extension of the backrest strut of described mounting portion below described seat, and each the joint protuberance in the described a pair of extension slides on the composition surface on each side of described mounting portion.

4. chair as claimed in claim 3, laterally be formed with a plurality of engaging grooves on the upper surface of wherein said joint protuberance, engagement member is arranged in the described mounting portion and has engagement lugs, described engagement lugs can be bonded in one of them of described a plurality of engaging grooves, when described engagement lugs moves up and when one of them of described engaging groove thrown off, described engagement member moves up and down allowing described joint protuberance to slide with respect to described mounting portion by control member, and described engagement member is arranged on the described joint protuberance or is provided with to such an extent that be higher than described joint protuberance.

5. chair as claimed in claim 1, wherein said back frame comprise upper boom, lower beam and left and right side lever, and the left and right side lever of described back frame broadens downwards towards described lower beam.

6. chair as claimed in claim 1, wherein said back frame are crooked backward in the lower end, make that the rear end at described seat is contained between described back frame and the described backrest strut when described back frame moves forward.

7. chair as claimed in claim 4, wherein said control member is installed in below the described seat.

8. chair as claimed in claim 7, wherein said control member comprises the handle that can manually rotate.

9. chair as claimed in claim 4, wherein said engagement member are installed between one of them the inner surface and another inner surface of described a pair of extension.