CN114027661A

CN114027661A - Chair leaning structure and chair

Info

Publication number: CN114027661A
Application number: CN202111413544.7A
Authority: CN
Inventors: 毛华忠; 何正堂; 吕国卫; 龚利雅; 朱程
Original assignee: ANJI FUHE FURNITURE CO LTD
Current assignee: ANJI FUHE FURNITURE CO LTD
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-02-11

Abstract

The invention relates to the technical field of furniture articles, in particular to a chair leaning structure and a chair, which comprises a chair seat, a chair back and a headrest, wherein a basic supporting box extending downwards is fixed at the back of the chair back, a bottom connecting arm extending forwards is integrally connected with the lower end of the basic supporting box, the bottom connecting arm is hinged with the chair seat and forms a first hinge part, the headrest is connected with a headrest supporting component extending downwards and capable of penetrating the basic supporting box, a part below the headrest supporting component is provided with a basic connecting rib capable of moving upwards and downwards relative to the basic supporting box in the basic supporting box, the bottom end of the basic connecting rib is integrally connected with a bottom connecting rib extending forwards, the front end of the bottom connecting rib is hinged with the chair seat and forms a second hinge part, the first hinge part is positioned in front of the second hinge part, the front-back length of the bottom connecting arm is greater than the front-back length of the bottom connecting rib, the position of the headrest can be stabilized during rearward deflection of the seat back.

Description

Chair leaning structure and chair

Technical Field

The invention relates to the technical field of furniture supplies, in particular to a chair leaning structure and a chair.

Background

In daily life, the chair is an indispensable furniture article for each enterprise of every family, and as long as everyone's place can be equipped with the chair, current chair structure is various, and the function is also a full stand of Lin Langmuir, and people also are more and more high to the various requirements of chair.

Chinese patent with application number 201820279480.3 discloses a liftable headrest for chair, which comprises a seat support, the bracing piece, the supporting leg, the go-between, the chair wheel, the bar, the handrail, back of the chair and headrest, seat support lower surface central point puts and links to each other with the bracing piece top, bracing piece bottom and go-between top central point put and link to each other, the supporting leg has a plurality of, go-between outside surface evenly is provided with the supporting leg, the supporting leg bottom is provided with the chair wheel, seat support both sides fixed mounting has the bar, the bar top is provided with the handrail, seat support upper surface one side links to each other with back of the chair bottom, the back of the chair top links to each other with the headrest bottom.

Still like the chair that chinese patent publication of application number 202023101725.X disclosed convenient to adjust headrest height, including the back of the chair and headrest, wherein, still include the connecting piece, the headrest includes first part and second part, first part is the linkage setting with the second part, be equipped with the spout on the first part, be equipped with a plurality of on the second part and be the position groove that keeps off that the interval set up, be equipped with gliding slider on the spout between first part and the second part, connecting piece one end is connected with the back of the chair, be equipped with the spliced pole of being connected with the slider on the other end and with the position post that keeps off the position groove adaptation.

The existing chair structures have a big problem that when the chair back leans backwards and rotates, the position of the headrest also deflects backwards, the visual angle of the head can deflect backwards and upwards, the sight of a person faces upwards and the front can not be observed, particularly, under the condition that the person needs to watch the front all the time in office or in a meeting, after the chair back leans backwards by the waist belt, the head needs to actively exert force forwards to keep the original visual angle, and for the cervical vertebra, the cervical vertebra injury is not small.

Disclosure of Invention

The invention aims to provide a chair leaning structure and a chair, which can ensure that the position of a headrest keeps stable in the process of the backward deflection of a chair back.

The technical purpose of the invention is realized by the following technical scheme: a chair leaning structure comprises a chair seat, a chair back and a headrest, wherein a basic supporting box extending downwards is fixed at the back of the chair back, the lower end of the basic supporting box is integrally connected with a bottom connecting arm which extends forwards, the bottom connecting arm is hinged with the chair seat and forms a first hinge part, the headrest is connected with a headrest supporting component which extends downwards and can be arranged on the basic supporting box in a penetrating way, the lower part of the headrest supporting component is provided with a foundation connecting rib which can move up and down in the foundation supporting box relative to the foundation supporting box, the bottom end of the basic connecting rib is integrally connected with a bottom connecting rib which extends forwards, the front end of the bottom connecting rib is hinged with the chair seat to form a second hinged part, the first hinge part is positioned in front of the second hinge part, and the front-back length of the bottom connecting arm is greater than that of the bottom connecting rib.

Preferably, the base support box is internally provided with a base support cavity for the base connecting ribs to relatively pass through up and down, a front side plate of the base support box is provided with a front base guide groove for the bottom connecting rib to pass through back and forth and relatively move up and down, an integrated connecting part of the base support box and the bottom connecting arm is provided with a transition groove communicated with the bottom of the front base guide groove, and in an initial state, the integrated connecting part of the base connecting ribs and the bottom connecting ribs is positioned in the transition groove.

Preferably, the upper end of the base connecting rib is further hinged with a first guide connecting seat extending upwards, the upper end of the first guide connecting seat is hinged with an intermediate connecting rib extending upwards, a base supporting groove which is communicated with the base supporting cavity at the bottom and extends upwards and is used for the first guide connecting seat and the intermediate connecting rib to pass through is formed in the base supporting box, the upper end of the intermediate connecting rib extends out of the base supporting groove, the upper end of the intermediate connecting rib is hinged with a second guide connecting seat extending upwards, and the upper part of the second guide connecting seat is connected with the headrest.

Preferably, the first guide connecting seat is provided with a first guide groove extending up and down, the base support box is fixed with a first guide block which is positioned in the first guide groove and can move up and down relative to the first guide groove, the bottom of the first guide groove is further provided with an installation groove extending up and down for fixedly installing the first guide block and the base support box, and the left-right length of the installation groove is smaller than the left-right length of the first guide block.

Preferably, the second guide connecting seat includes a bottom guide plate hinged to the upper end of the middle connecting rib and extending left and right, and left and right ends of the bottom guide plate are respectively integrally connected with a left guide block and a right guide block extending upward, and upper end portions of the left and right guide blocks are connected with the headrest.

Preferably, the back of the chair back is further fixed with an upper guide box body for the second guide connecting seat to pass through up and down relatively.

Preferably, the upper guide box body is provided with a left side groove and a right side groove which are respectively used for the left guide block and the right guide block to move up and down and penetrate out of the upper guide box body, and a middle main body groove which is communicated with the bottoms of the left side groove and the right side groove and used for the bottom guide plate to move up and down.

Preferably, the bottom guide plate is integrally connected with an upper hinged plate which penetrates out of the upper guide box body forwards and is hinged with the upper end of the middle connecting rib, and the upper guide box body is provided with an upper passing groove through which the upper hinged plate penetrates out forwards and moves up and down relatively.

Preferably, the integral connection part of the base connecting rib and the bottom connecting rib is in an arc connection shape, and the integral connection part of the base support box and the bottom connecting arm plate is also in an arc connection shape.

A chair comprising a chair reclining structure according to any one of the preceding claims.

The invention has the beneficial effects that: the back of the body drives the in-process that the back of the chair deflected backward, can guarantee throughout that the amount of movement of the front and back upper and lower position of headrest reduces by a wide margin for the stable position of headrest can effectively guarantee the stable position of head, can be the sight of people's head better and remain stable, also can effectively protect the cervical vertebra, to the crowd of meeting or official working, very useful, need not to adjust in the use moreover, very convenient and practical.

Drawings

FIG. 1 is a perspective view of a reclining structure of a chair according to an embodiment;

FIG. 2 is a schematic perspective view of a portion of the structure of FIG. 1 from a front perspective;

FIG. 3 is a perspective view of the lower half of the chair back of the arrangement of FIG. 2 after removal;

fig. 4 is a schematic perspective view of the basic supporting box of fig. 3 after the front side plate and the front side plate of the upper guiding box are removed.

Detailed Description

The following specific examples are given by way of illustration only and not by way of limitation, and it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made in the examples without inventive faculty, and yet still be protected by the scope of the claims.

The embodiment, as shown in fig. 1-4, a chair leaning structure comprises a chair seat 1, a chair back 2 and a headrest 3, wherein a base supporting box 41 extending downwards is fixed on the back of the chair back 2, a bottom connecting arm 42 extending forwards is integrally connected to the lower end of the base supporting box 41, the bottom connecting arm 42 is hinged to the chair seat 1 and forms a first hinge part a, it can be seen that the chair of the present application is designed for a structure in which the chair back 2 can move, that is, the chair back can deflect around the chair seat in the front and back, which is a common function of the existing chair, so that the back of a person can deflect backwards by driving the chair back backwards after leaning backwards, but the existing chair back can drive the headrest to turn backwards together, so that the position of the headrest also deflects backwards greatly, and the position of the headrest leans backwards, so that the sight of the person can face upwards and cannot maintain the stability of the sight, it is necessary to actively turn the head forward so that the neck and head do not lean well. The application thus makes the following further improvements:

be connected with the downwardly extending on the headrest 3 and can wear to establish headrest supporting component on the basis support box 41, the part that headrest supporting component leaned on has can be in relative in the basis support box 41 the basis splice bar 51 that the basis support box 41 reciprocated, the bottom an organic whole of basis splice bar 51 is connected with the end splice bar 52 of forward extension, the front end of end splice bar 52 is connected and is formed the articulated position b of second with seat support 1 is articulated, first articulated position a is located the place ahead of the articulated position b of second, the length is greater than around the link arm 42 of end splice bar 52 around. Two different deflection structures are formed through the difference of the positions of the hinged parts and the difference of the front length and the rear length of the bottom connecting arm 42 and the bottom connecting rib 52, so that the backward leaning deflection amplitude of the chair back is obviously larger than the backward deflection amplitude of the head rest, the position of the head rest can be kept to be not greatly moved basically, the length of the bottom connecting arm 42 is preferably within 5 times or more and 15 times of the length of the bottom connecting rib 52, the main purpose is to ensure that the rotation radius of the chair back around a first hinged part a is obviously larger than the rotation radius of the head rest 3 around a second hinged part b, generally, the rotation radius of the chair back around the first hinged part a is controlled to be within 3 times or more and 10 times of the rotation radius of the head rest 3 around the second hinged part b, and the ratio of the rotation radii of the chair back to the head rest is smaller than the ratio of the lengths of the bottom connecting arm 42 and the bottom connecting rib 52 by one time because the first hinged part a is not necessarily at the front end of the bottom connecting arm 42 And then the obtained product is obtained. Therefore, the relative headrest can descend in the backward deflection process of the chair back due to the fall of the rotation amplitude, the headrest can basically keep still, namely the headrest and the chair back deflect asynchronously, the position of the headrest can be kept in a normal use state, namely an initial state, namely the state that the chair back does not deflect backwards, in the process that the chair back deflects greatly, the chair back has a good fatigue relieving effect on the waist and back of a human body, meanwhile, the headrest basically keeps in the original position, so that the head and neck part is still well supported, the sight line can be kept forward, and the conference, television watching, office and the like cannot be influenced. The connecting ribs can be made of metal steel, and the base supporting box 41 and the bottom connecting arm 42 can be integrally formed by injection molding materials. The base support box 41 may be fixed to the chair back by any conventional fixing means. The headrest supporting component and the headrest can be connected in the existing connection mode, the connection between the headrest and the headrest supporting component can be fixed at the place, and only the connection can be achieved, so that the headrest and the headrest supporting component can be adjusted up and down after being connected, and then the connection structure which can be adjusted up and down is adopted.

In order to further ensure the realization of the above solution, i.e. the solution in which the position of the headrest is substantially unchanged after the seat back is deflected backwards, the following optimization is made:

have the basis that supplies basic splice bar 51 to walk about relatively in the basic box 41 and support chamber 410, set up on the preceding curb plate of basic box 41 and supply preceding basic guide way 520 that passes and relative movement from top to bottom around the splice bar 52, basic box 41 with the integrative connection position department of end connecting arm 42 set up with the aqueduct 412 of crossing of preceding basic guide way 520's bottom intercommunication, it is in to cross aqueduct 412 basic box 41 with end connecting arm 42 leans on the position of inboard corner, supports the preceding curb plate of box 41 promptly on the position of curb plate body coupling on the preceding curb plate of box 41 and end connecting arm 42. Further, in the initial state, the integral connection portion of the base connecting rib 51 and the bottom connecting rib 52 is located in the transition groove 412, so that the integral connection portion of the base connecting rib 51 and the bottom connecting rib 52 and the integral connection portion of the base support box 41 and the bottom connecting arm 42 are at the same position, a better initial state is formed in the deflection process of the seat back, once the seat back deflects backwards and downwards, the seat back moves obviously, the headrest support assembly and the headrest move forwards and upwards obviously relatively, and the position of the headrest is kept basically not to move or has a smaller position change, of course, in this design, if the headrest also needs to have enough deflection capacity to meet the requirement of resting and lying, the aforementioned rotation radius ratio can be changed, for example, the bottom connecting arm 42 is designed to be shorter, and the portion of the first hinge portion a is located backwards, the rotation amplitude of the headrest can be improved. The structure of the chair is mainly characterized in that the deflection of the chair back and the deflection of the headrest are asynchronous, and the chair can be better suitable for the requirement that the visual line of the head of a human body is basically stable in various states of the chair.

Preferably, the upper end of the basic connecting rib 51 is hinged with a first guide connecting seat 6 extending upwards, the upper end part of the first guide connecting seat 6 is hinged with an intermediate connecting rib 53 extending upwards, the first guide connecting seat 6 can also be made of injection molding parts, and the intermediate connecting rib 53 can also be made of steel. Further, a base support groove 411 is formed in the base support box 41, the bottom of which is communicated with the base support cavity 410 and extends upwards, and the first guide connecting seat 6 and the intermediate connecting rib 53 pass through the base support groove in an up-and-down opposite mode, so that the guiding performance is better. Further, the upper end of the middle connecting rib 53 extends out of the base supporting groove 411, the upper end of the middle connecting rib 53 is hinged with a second guide connecting seat 7 which extends upwards, and the upper part of the second guide connecting seat 7 is connected with the headrest 3. The second guide connecting seat 7 can also be made of injection molding. The headrest support assembly actually includes the basic members of the base link rib 51, the bottom link rib 52, the first guide link socket 6, the middle link rib 53, and the second guide link socket 7.

Further, a first guide groove 60 extending up and down is formed in the first guide connecting seat 6, a first guide block 61 which is located in the first guide groove 60 and can move up and down relative to the first guide groove 60 is fixed on the base support box 41, specifically, the first guide block 61 is installed at a position where a rear side plate of the base support box 41 is located in the base support box 41, namely, the front side, in order to install the first guide block 61, an installation groove 62 extending up and down for fixedly installing the first guide block 61 and the base support box 41 is further formed in the bottom of the first guide groove 60, the first guide block 61 is placed in the first guide groove 60, and locking members such as bolts can install and fix the first guide block 61 in the base support box 41 by passing through the installation groove 62. Further preferably, the left and right length of the mounting groove 62 is smaller than the left and right length of the first guide block 61, so that the first guide block 61 cannot fall out of the first guide groove 60 backwards, and two sides of the groove bottom of the first guide groove 60 have a backward limiting effect on the first guide block 61. Design like this, further promote the effect of linkage to make the guidance quality more stable.

Preferably, the second guide link 7 includes a bottom guide plate 71 hinged to the upper end of the middle link bar 53 and extending left and right, and left and right guide blocks 72 and 73 integrally connected to left and right ends of the bottom guide plate 71 and extending upward, respectively, and upper end portions of the left and right guide blocks 72 and 73 are connected to the headrest 3. The upper ends of the left guide block 72 and the right guide block 73 can be integrally connected with a sleeve structure extending up and down and sleeved on the headrest 3.

In order to further improve the guiding and linkage properties, the back of the chair back 2 is also fixed with an upper guiding box body 8 for the second guiding connecting seat 7 to pass through up and down relatively. The upper guide box 8 may also be an injection molded part. Specifically, the upper guiding box body 8 is formed with a left and right middle main body groove 710 which is used for the left guiding block 72 and the right guiding block 73 to move up and down relatively and penetrate out of the left groove 720 and the right groove 730 of the upper guiding box body 8 and is communicated with the bottoms of the left groove 720 and the right groove 730 to move up and down the bottom guiding plate 71. The middle parts of the left guide block 72 and the right guide block 73 are in an arc shape which is arched backwards to optimize the structure, and the left side slot 720 and the right side slot 730 also have arc parts correspondingly, so that the structural design can also reduce the backward deflection of the headrest.

An upper hinge plate 711 which penetrates out of the front side plate of the upper guide box body 8 forwards and is hinged with the upper end of the middle connecting rib 53 is integrally connected to the front side plate surface of the bottom guide plate 71, an upper passing groove 80 for the upper hinge plate 711 to penetrate out forwards and move up and down relatively is formed in the front side plate of the upper guide box body 8, the upper hinge plate 711 can be arranged at two positions which are spaced from each other at left and right, and the upper end of the middle connecting rib 53 is positioned between the left upper hinge plate 711 and the right upper hinge plate 711 and is hinged through a hinge shaft. Making the stability of the deflection better. The hinge axes of the above-mentioned hinge structures extend in all directions, i.e., the structures capable of generating deflection are in the front-rear direction.

Preferably, the integral connection part of the base connecting rib 51 and the bottom connecting rib 52 is in an arc connection shape, and the integral connection part of the base support box 41 and the bottom connecting arm plate 42 is also in an arc connection shape, so that an arc fillet structure is formed, and the stress distribution of the structure is optimized.

The whole structure starts from the initial state, a person leans against the back of the chair through the waist to make a lying posture, the chair back deflects successively, the chair back drives the basic support box 41 and the upper guide box body 8 to deflect greatly, the deflection amplitude of the headrest support assembly is small, the chair back drives the basic support box 41 and the upper guide box body 8 to deflect downwards and backwards relative to the headrest support assembly, and the arrangement of various hinge points enables the structure between the upper part and the lower part of the headrest support assembly to generate linkage deformation and enables the backward deflection amount of the headrest to be more than 50% smaller than the backward deflection amount of the chair back, so that the position of the headrest can be close to the initial state basically, the effectiveness of the head support and the stability of the visual angle are ensured, if the person needs to recover, only if the waist of the person returns forwards, the chair back and the headrest can recover to the initial state, of course, in addition to the hinged structure, the bottom connecting arm 42 and the seat 1 also need to be provided with a return structure, such as some elastic return structures in the prior art, so that the back of the chair deflected backwards can be automatically deflected forwards to return when the waist of a person moves forwards away from the back of the chair.

The embodiment also provides a chair, which comprises the chair leaning structure, and the chair leaning structure can be applied to various chair structures.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A chair reclining structure, comprising: including seat support (1), the back of the chair (2) and headrest (3), the back of the chair (2) is fixed with basic support box (41) that extend downwards, the lower extreme an organic whole of basic support box (41) is connected with end linking arm (42) that extend forward, end linking arm (42) are connected and are formed first articulated position (a) with seat support (1) are articulated, be connected with on headrest (3) and extend downwards and can wear to establish headrest supporting component on basic support box (41), headrest supporting component part under leaning on has can be in basic support box (41) is relative basic connecting rib (51) that basic support box (41) reciprocated, the bottom an organic whole of the bottom of basic connecting rib (51) is connected with end connecting rib (52) that extend forward, the front end of end connecting rib (52) is articulated with seat support (1) and is connected and is formed second articulated position (b), the first hinge part (a) is positioned in front of the second hinge part (b), and the front-back length of the bottom connecting arm (42) is greater than that of the bottom connecting rib (52).

2. A chair reclining structure according to claim 1, wherein: have in the basis support box (41) and supply basis splice bar (51) relative basis support chamber (410) of walking from top to bottom, offer on the preceding curb plate of basis support box (41) and supply preceding basis guide way (520) that pass and relative movement from top to bottom around splice bar (52), basis support box (41) with the body coupling position department of end link arm (42) offer with cross aqueduct (412) of the bottom intercommunication of preceding basis guide way (520), initial condition, basis splice bar (51) and the body coupling position of end splice bar (52) are in crossing aqueduct (412).

3. A chair reclining structure according to claim 1, wherein: the upper end of basis splice bar (51) still articulates there is first direction connecting seat (6) that upwards extends, the articulated intermediate junction muscle (53) that upwards extends in the upper end position of first direction connecting seat (6), be formed with the bottom in basic support box (41) with basic support chamber (410) intercommunication and the first direction connecting seat (6) of confession that upwards extends and intermediate junction muscle (53) relative base support groove (411) of walking from top to bottom, stretch out intermediate junction muscle (53) upper end base support groove (411), intermediate junction muscle (53) upper end articulates there is second direction connecting seat (7) that upwards extends, second direction connecting seat (7) lean on the upper portion with headrest (3) connect.

4. A chair reclining structure according to claim 3, wherein: have first guide way (60) that extend from top to bottom in first direction connecting seat (6), be fixed with on basic support box (41) and be in first guide way (60) and can be relative first guide block (61) that first guide way (60) reciprocated, extend about still having seted up the tank bottom of first guide way (60) and supply first guide block (61) with mounting groove (62) that basic support box (41) fixed mounting used, length is less than about mounting groove (62) about first guide block (61).

5. A chair reclining structure according to claim 3, wherein: second direction connecting seat (7) including be used for with middle joint muscle (53) upper end articulated and control bottom deflector (71) that extends and both ends left and right sides deflector (71) are respectively the body coupling have and upwards the left guide block (72) and the right guide block (73) that extend, left side guide block (72) and right guide block (73) upper end part are lived with headrest (3) connection.

6. A chair reclining structure according to claim 5, wherein: the back of the chair back (2) is also fixed with an upper guide box body (8) for the second guide connecting seat (7) to pass through up and down relatively.

7. A chair reclining structure according to claim 6, wherein: the upper guide box body (8) is internally provided with a left side groove (720) and a right side groove (730) which are used for the left guide block (72) and the right guide block (73) to move up and down and penetrate out of the upper guide box body (8) respectively, and a middle main body groove (710) which is communicated with the bottoms of the left side groove (720) and the right side groove (730) and used for the bottom guide plate (71) to move up and down.

8. A chair reclining structure according to claim 5, wherein: an upper hinge plate (711) which penetrates out of the upper guide box body (8) forwards and is hinged with the upper end of the middle connecting rib (53) is integrally connected to the bottom guide plate (71), and an upper passing groove (80) which allows the upper hinge plate (711) to penetrate out forwards and move up and down relatively is formed in the upper guide box body (8).

9. A chair reclining structure according to claim 1, wherein: the foundation support box is characterized in that the integral connection part of the foundation connecting rib (51) and the bottom connecting rib (52) is in an arc connection shape, and the integral connection part of the foundation support box (41) and the bottom connecting arm (42) is also in an arc connection shape.

10. A chair, characterized in that: comprising a chair reclining structure according to any of claims 1 to 9.