CN220777880U - Chair and tray thereof - Google Patents

Abstract

The utility model discloses a chair and a tray thereof, comprising: the front part of the base is provided with a first connecting rod; the front part of the first connecting seat is provided with at least one sliding groove; a second connecting seat; a first connector; a second connector; at least one elastic member; the first connecting seat is positioned above the base, and the first connecting rod of the base is arranged in the sliding groove of the first connecting seat in a penetrating way and can move back and forth along the sliding groove; the second connecting seat is hinged with the base; the lower end of the first connecting piece is hinged with the base, the lower end of the second connecting piece is hinged with the second connecting seat, and the upper end of the first connecting piece and the upper end of the second connecting piece are respectively hinged at the rear part of the first connecting seat; the front end of the elastic piece is connected with the base, and the rear end of the elastic piece is connected with the front part of the second connecting seat. In this scheme, only through the user lean on the back of the chair just can change the inclination of this chair seat and back of the chair, use the travelling comfort higher, the regulation mode is simple.

Description

Chair and tray thereof

Technical Field

The utility model relates to the technical field of seats, in particular to a chair and a tray thereof.

Background

The chair is a piece of furniture which is indispensable for people to work or rest, and in order to improve the comfort during use, the chair backs of many existing chairs can rotate to different angles back and forth relative to the chassis. The chair mainly relies on a rotating connection structure between a tray for fixing a chair seat and a chair back fixing frame for fixing a chair back and a locking mechanism to realize the functions of lying down the chair back and adjusting the inclination angle of the chair back, and a spring piece is usually arranged on a rotating shaft of the chair back fixing frame and generates certain resilience force in the process of rotating the chair back, so that a user can support the chair back by a certain back in the lying process, and after the locking mechanism is released, the chair back can be automatically restored to an initial state by the spring piece.

The patent application with the publication number of CN102846068A discloses a swivel chair chassis, which comprises a seat plate, a support plate, a backrest bracket and a support frame, wherein the seat plate is connected with a chair seat, the backrest bracket is connected with a backrest, the bottom of the support frame and the bottom of the backrest bracket are hinged with the support plate, the seat plate is hinged with the top of the support frame and the top of the backrest bracket, the swivel chair chassis does not need manual adjustment, the backrest leaning restoring force is correspondingly matched according to the weight of a human body, the larger the weight of a user is, the restoring force of the backrest leaning and leaning is automatically increased, and the swivel chair is helpful for the user to lean and lift up. When the swivel chair chassis is used, the seat board, the support board, the backrest bracket and the support frame are arranged in a quadrilateral mode, when the backrest leans backwards, the seat board can relatively move backwards and downwards, however, in the process, the seat board is always kept horizontal, the inclination angle of the seat board cannot be changed in an adaptive mode, and the legs of a user cannot be emptied and relaxed thoroughly.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide a chair and a tray thereof, when the tray is used, a user can change the inclination angles of a chair seat and a chair back on the chair only by leaning on the chair back according to the needs of the user, the use comfort is higher, and the mode of changing the chair seat and the chair back is simple.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a tray, comprising:

the base is used for connecting feet of the chair, the base is provided with a containing groove, and the front part of the base is provided with a first connecting rod;

the front part of the first connecting seat is provided with at least one sliding groove, and the first connecting seat is used for installing a seat of a chair;

the rear end of the second connecting seat is used for installing a chair back of a chair;

a first connector;

a second connector;

at least one elastic member;

the first connecting seat is positioned above the base, and the first connecting rod of the base is arranged in the sliding groove of the first connecting seat in a penetrating way and can move back and forth along the sliding groove; the front part of the second connecting seat is positioned in the accommodating groove of the base, and the second connecting seat is hinged with the base; the lower end of the first connecting piece is hinged with the base, the lower end of the second connecting piece is hinged with the second connecting seat, and the upper end of the first connecting piece and the upper end of the second connecting piece are respectively hinged at the rear part of the first connecting seat; the elastic piece is arranged in the accommodating groove of the base, the front end of the elastic piece is connected with the base, and the rear end of the elastic piece is connected with the front part of the second connecting seat.

When the tray is used, a user leans backwards against the chair back, the second connecting seat rotates downwards relative to the base, so that the second connecting piece is driven to move downwards and backwards relative to the base, the elastic piece is stretched, the first connecting piece, the second connecting piece and the first connecting seat are hinged, the corresponding relative base of the first connecting piece rotates, the first connecting seat moves backwards and downwards relative to the base through the matching of the sliding groove and the first connecting rod, the relative inclination between the first connecting seat and the base is caused, when the tray is used, the user has the sense of sinking at the buttocks, the comfort is higher, and after the user withdraws the force of leaning backwards, the second connecting seat returns to the initial position under the action of the elastic piece, so that the chair back and the chair seat return to the initial position.

Preferably, the base comprises a bottom plate and two side plates, the two side plates are respectively arranged at the left side and the right side of the bottom plate so as to form the accommodating groove on the base, the upper ends of the front parts of the two side plates are connected through a first connecting rod, and the lower ends of the front parts of the two side plates are connected through a second connecting rod; the first connecting rod is positioned above the second connecting rod; the front end of the elastic piece is connected with a second connecting rod on the base.

Preferably, the side plate comprises a first connecting part and a second connecting part which are connected in an L shape, the lower end of the first connecting part is connected with the front end of the second connecting part, the first connecting rod is positioned at the upper end of the first connecting part, and the second connecting rod is positioned at the lower end of the first connecting part.

Preferably, the second connecting seat comprises a fixing sheet and two connecting sheets, the front ends of the two connecting sheets are connected through a third connecting rod, the rear ends of the two connecting sheets are connected through the fixing sheet, and the chair back of the chair is arranged on the fixing sheet; the connecting sheet is arranged in a fold line shape; the rear end of the elastic piece is connected with the third connecting rod of the second connecting seat.

Preferably, the connecting piece sequentially comprises a third connecting part, a fourth connecting part, a fifth connecting part, a sixth connecting part and a seventh connecting part from front to back, wherein the lower end of the third connecting part is connected with the lower end of the fourth connecting part, the upper end of the fourth connecting part is connected with the front end of the fifth connecting part, the rear end of the fifth connecting part is connected with the upper end of the sixth connecting part, and the lower end of the sixth connecting part is connected with the front end of the seventh connecting part; the third connecting rod is arranged at the upper end of the third connecting part, the lower end of the third connecting part is hinged with the base, the lower end of the second connecting part is hinged with the sixth connecting part, the third connecting part and the fourth connecting part are arranged in a V-shaped mode, the connecting part of the third connecting part and the fourth connecting part is located at the lowest position of the connecting sheet, and the seventh connecting part is located at the rear of the base.

Preferably, the base is further provided with two avoidance grooves, and the two avoidance grooves are respectively positioned below the corresponding side connecting sheets.

Preferably, the device further comprises a fourth connecting rod, the second connecting seat is hinged with the base through the fourth connecting rod, and the fourth connecting rod is located below the third connecting rod.

Preferably, the device further comprises a seventh connecting rod, a fifth connecting rod and a sixth connecting rod, wherein the fifth connecting rod is arranged at the rear part of the first connecting seat, and the upper end of the first connecting piece and the upper end of the second connecting piece are hinged with the first connecting seat through the fifth connecting rod; the sixth connecting rod is arranged at the rear part of the base, and the first connecting piece is hinged with the base through the sixth connecting rod; the seventh connecting rod is arranged on the second connecting seat, and the second connecting piece is hinged with the second connecting seat through the seventh connecting rod; the sixth connecting rod is located in front of the seventh connecting rod, the sixth connecting rod is located below the second connecting seat, and the fifth connecting rod is located between the sixth connecting rod and the seventh connecting rod.

Preferably, the two elastic pieces are symmetrically arranged in the accommodating groove.

A chair comprising a tray as described above.

The utility model has the following beneficial effects due to the adoption of the technical scheme: when a user uses the tray and leans back on the chair back, the rear end of the second connecting seat rotates downwards relative to the base, so that the second connecting piece is driven to move downwards and backwards relative to the base, the elastic piece is stretched, the corresponding relative base of the first connecting piece rotates, the first connecting seat moves backwards and downwards relative to the base, relative inclination occurs between the first connecting seat and the base, the user has a sense of sinking buttocks when using the chair, the comfort is higher, and after the user withdraws the force leaning back, the second connecting seat returns to the initial position under the action of the elastic piece, so that the chair back and the chair seat return to the initial positions. Therefore, when the tray is used, a user can change the inclination angles of the chair seat and the chair back on the chair only by leaning on the chair back according to the needs of the user, the use comfort is higher, and the mode of changing the inclination angles of the chair seat and the chair back is simple.

Drawings

FIG. 1 is a schematic view of a tray according to the present utility model;

FIG. 2 is a second schematic view of the structure of the tray of the present utility model;

FIG. 3 is a schematic view of the structure of FIG. 1 with the first connector base removed;

fig. 4 is a schematic structural view of the connection piece.

Reference numerals:

1. a base; 11. a receiving groove; 12. a bottom plate; 13. a first link; 14. a second link; 15. a side plate; 151. a first connection portion; 152. a second connecting portion; 16. a fourth link; 17. an avoidance groove;

2. a first connection base; 21. a chute; 22. a fifth link;

3. a second connecting seat; 31. a third link; 32. a fixing piece; 33. a connecting sheet; 331. a third connecting portion; 332. a fourth connecting portion; 333. a fifth connecting portion; 334. a sixth connecting portion; 335. a seventh connecting portion;

4. a first connector; 41. a sixth link;

5. a second connector; 51. a seventh link;

6. an elastic member.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

For convenience of description, in the utility model, the side on which the back leans when the user uses the tray is the back, whereas the side close to the ground is the front, whereas the side close to the ground is the bottom, whereas the side close to the ground is the top.

A pallet as in fig. 1-4, comprising:

the base 1 is used for connecting feet of a chair, the base 1 is provided with a containing groove 11, and the front part of the base 1 is provided with a first connecting rod 13;

the first connecting seat 2, the front part of the first connecting seat 2 is provided with at least one chute 21, and the first connecting seat 2 is used for installing a seat of a chair;

the second connecting seat 3, the rear end of the second connecting seat 3 is used for installing the back of the chair;

a first connector 4;

a second connector 5;

at least one elastic member 6; typically, the elastic member 6 is a spring.

The first connecting seat 2 is positioned above the base 1, and a first connecting rod 13 of the base 1 is arranged in a chute 21 of the first connecting seat 2 in a penetrating manner and can move back and forth along the chute 21; the front part of the second connecting seat 3 is positioned in the accommodating groove 11 of the base 1, and the second connecting seat 3 is hinged with the base 1; the lower end of the first connecting piece 4 is hinged with the base 1, the lower end of the second connecting piece 5 is hinged with the second connecting seat 3, and the upper end of the first connecting piece 4 and the upper end of the second connecting piece 5 are respectively hinged at the rear part of the first connecting seat 2; the elastic piece 6 is arranged in the accommodating groove 11 of the base 1, the front end of the elastic piece 6 is connected with the base 1, and the rear end of the elastic piece 6 is connected with the front part of the second connecting seat 3.

As shown in fig. 1 and 2, in the present utility model, when a user uses the tray and leans back against the back of the chair, the rear end of the second connecting seat 3 rotates downward relative to the base 1, so as to drive the second connecting member 5 to move downward and backward relative to the base, the elastic member 6 is stretched, and as the first connecting member 4, the second connecting member 5 and the first connecting seat 2 are hinged, the first connecting seat 2 correspondingly rotates relative to the base 1, and the first connecting seat 2 moves backward and downward relative to the base 1 through the cooperation of the sliding groove and the first connecting rod 13, so that the first connecting seat 2 and the base 1 are inclined relatively, the user has a sense of sinking in buttocks during use, the comfort is higher, and after the user withdraws the leaning back force, the second connecting seat 3 returns to the initial position under the action of the elastic member 6, so that the back and the chair returns to the initial position. Therefore, when the tray is used, a user can change the inclination angles of the chair seat and the chair back on the chair only by leaning on the chair back according to the needs of the user, the use comfort is higher, and the mode of changing the inclination angles of the chair seat and the chair back is simple.

In the utility model, the base 1 comprises a bottom plate 12 and two side plates 15, wherein the two side plates are respectively arranged at the left side and the right side of the bottom plate 12 so as to form the accommodating groove 11 on the base 1, the upper ends of the front parts of the two side plates 12 are connected through a first connecting rod 13, and the lower ends of the front parts of the two side plates 12 are connected through a second connecting rod 14; the first connecting rod 13 is positioned above the second connecting rod 14; the front end of the elastic member 6 is connected with a second link 14 on the base 1. More specifically, the side plate 15 includes a first connecting portion 151 and a second connecting portion 152 that are connected in an L-shape, the first connecting portion 151 and the second connecting portion 152 are integrally formed, a lower end of the first connecting portion 151 is connected with a front end of the second connecting portion 152, the first connecting rod 13 is located at an upper end of the first connecting portion 151, and the second connecting rod 14 is located at a lower end of the first connecting portion 151.

In the present utility model, the second connecting seat 3 includes a fixing piece 32 and two connecting pieces 33, the front ends of the two connecting pieces 33 are connected by a third connecting rod 31, the rear ends of the two connecting pieces 33 are connected by the fixing piece 32, the back of the chair is mounted on the fixing piece 32, and the rear end of the elastic piece 6 is connected with the third connecting rod 31 of the second connecting seat 3. The connecting piece 31 is arranged in a zigzag manner, more specifically, as shown in fig. 4, the connecting piece 33 includes, from front to back, a third connecting portion 331, a fourth connecting portion 332, a fifth connecting portion 333, a sixth connecting portion 334, and a seventh connecting portion 335 in sequence, the third connecting portion 331, the fourth connecting portion 332, the fifth connecting portion 333, the sixth connecting portion 334, and the seventh connecting portion 335 are integrally formed, a lower end of the third connecting portion 331 is connected with a lower end of the fourth connecting portion 332, an upper end of the fourth connecting portion 332 is connected with a front end of the fifth connecting portion 333, a rear end of the fifth connecting portion 333 is connected with an upper end of the sixth connecting portion 334, and a lower end of the sixth connecting portion 334 is connected with a front end of the seventh connecting portion 335; the third connecting rod 31 is disposed at the upper end of the third connecting portion 331, the lower end of the third connecting portion 331 is hinged to the base 1, and the lower end of the second connecting member 5 is hinged to the sixth connecting portion 334. The third connecting portion 331 and the fourth connecting portion 332 are disposed in a V-shape, the connecting portion of the third connecting portion 331 and the fourth connecting portion 332 is located at the lowest position of the connecting piece 33, and the seventh connecting portion 335 is located at the rear of the base 1.

When the second connecting seat 3 rotates relative to the base 1, in order to prevent the connection between the third connecting portion 331 and the fourth connecting portion 332 from interfering with the bottom plate 12 of the base 1, two avoidance grooves 17 are further formed in the bottom plate 12 of the base 1, and the two avoidance grooves 17 are respectively located below the corresponding side connecting pieces 33.

In the present utility model, the second connecting seat 3 is hinged to the base 1 by a fourth link 16, and the fourth link 16 is located below the third link 31.

The device further comprises a seventh connecting rod 51, a fifth connecting rod 22 and a sixth connecting rod 41, wherein the fifth connecting rod 22 is arranged at the rear part of the first connecting seat 2, and the upper end of the first connecting piece 4 and the upper end of the second connecting piece 5 are hinged with the first connecting seat 2 through the fifth connecting rod 22; the sixth connecting rod 41 is arranged at the rear part of the base 1, and the first connecting piece 4 is hinged with the base 1 through the sixth connecting rod 41; the seventh connecting rod 51 is arranged on the second connecting seat 3, and the second connecting piece 5 is hinged with the second connecting seat 3 through the seventh connecting rod 51; the sixth connecting rod 41 is located in front of the seventh connecting rod 51, the sixth connecting rod 41 is located below the second connecting seat 3, and the fifth connecting rod 22 is located between the sixth connecting rod 41 and the seventh connecting rod 51.

In the utility model, the number of the elastic pieces 6 is two, and the two elastic pieces 6 are symmetrically arranged in the accommodating groove 11, so that the second connecting seat 3 can be stretched more stably or reset more stably under the action of the second connecting seat 3, and the second connecting seat 3 is prevented from being blocked and the like. Of course, the number of the elastic members 6 may be two or more, and the elastic members may be symmetrically disposed in the accommodating groove 11. The left and right sides of the front portion of the first connecting seat 2 are respectively provided with a chute 21, and the first connecting rod 13 of the base 1 is arranged in the two chutes 21 of the first connecting seat 2 in a penetrating manner and can move back and forth along the chute 21, so that the base 1 can be prevented from swinging left and right relative to the first connecting seat 2.

The utility model also discloses a chair, which comprises a chair seat, a chair back, chair legs and the tray, wherein the chair seat is arranged on the first connecting seat of the tray, the chair legs are arranged on the base of the tray, and the chair back is arranged at the rear end of the second connecting seat of the tray.

All features described in the description, the appended claims and the drawings, either alone or in any combination, are important features of the present utility model.

In the description of the present specification, the descriptions of the terms "one embodiment," "some embodiments," "one implementation," "a particular implementation," "other implementations," "examples," "particular examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment, implementation, or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described above may be combined in any suitable manner in any one or more embodiments, implementations, or examples. The technical scheme disclosed by the utility model also comprises the technical scheme that any one or more specific features, structures, materials or characteristics are formed singly or in combination.

Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, variations, deletions of parts, additions of features, or re-combination of features may be made to the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model, all such simple modifications, equivalents, and adaptations of the embodiments as may be made by the principles of the utility model and without departing from the scope of the utility model.

Claims (10)

1. A tray, comprising:

the base (1) is used for connecting feet of the chair, the base (1) is provided with a containing groove (11), and the front part of the base (1) is provided with a first connecting rod (13);

the chair comprises a first connecting seat (2), wherein at least one sliding groove (21) is formed in the front part of the first connecting seat (2), and the first connecting seat (2) is used for installing a seat of the chair;

the rear end of the second connecting seat (3) is used for installing a chair back of a chair;

a first connector (4);

a second connection (5);

at least one elastic element (6);

the first connecting seat (2) is positioned above the base (1), and a first connecting rod (13) of the base (1) is arranged in a sliding groove (21) of the first connecting seat (2) in a penetrating way and can move forwards and backwards along the sliding groove (21); the front part of the second connecting seat (3) is positioned in the accommodating groove (11) of the base (1), and the second connecting seat (3) is hinged with the base (1); the lower end of the first connecting piece (4) is hinged with the base (1), the lower end of the second connecting piece (5) is hinged with the second connecting seat (3), and the upper end of the first connecting piece (4) and the upper end of the second connecting piece (5) are respectively hinged at the rear part of the first connecting seat (2); the elastic piece (6) is arranged in the accommodating groove (11) of the base (1), the front end of the elastic piece (6) is connected with the base (1), and the rear end of the elastic piece (6) is connected with the front part of the second connecting seat (3).

2. A pallet according to claim 1, characterized in that the base (1) comprises a bottom plate (12) and two side plates (15), which are respectively arranged on the left and right sides of the bottom plate (12) so as to form the accommodating groove (11) on the base (1), wherein the upper ends of the front parts of the two side plates (15) are connected through a first connecting rod (13), and the lower ends of the front parts of the two side plates (15) are connected through a second connecting rod (14); the first connecting rod (13) is positioned above the second connecting rod (14); the front end of the elastic piece (6) is connected with a second connecting rod (14) on the base (1).

3. A pallet as claimed in claim 2, characterised in that the side plate (15) comprises a first connecting portion (151) and a second connecting portion (152) connected in an L-shape, the lower end of the first connecting portion (151) being connected to the front end of the second connecting portion (152), the first connecting rod (13) being located at the upper end of the first connecting portion (151), and the second connecting rod (14) being located at the lower end of the first connecting portion (151).

4. A pallet according to claim 1, characterized in that the second connecting seat (3) comprises a fixing piece (32) and two connecting pieces (33), the front ends of the two connecting pieces (33) are connected through a third connecting rod (31), the rear ends of the two connecting pieces (33) are connected through the fixing piece (32), and the back of the chair is arranged on the fixing piece (32); the connecting sheet (33) is arranged in a fold line shape; the rear end of the elastic piece (6) is connected with a third connecting rod (31) of the second connecting seat (3).

5. The tray according to claim 4, wherein the connecting piece (33) comprises a third connecting portion (331), a fourth connecting portion (332), a fifth connecting portion (333), a sixth connecting portion (334) and a seventh connecting portion (335) in this order from front to back, the lower end of the third connecting portion (331) is connected to the lower end of the fourth connecting portion (332), the upper end of the fourth connecting portion (332) is connected to the front end of the fifth connecting portion (333), the rear end of the fifth connecting portion (333) is connected to the upper end of the sixth connecting portion (334), and the lower end of the sixth connecting portion (334) is connected to the front end of the seventh connecting portion (335); the third connecting rod (31) is arranged at the upper end of the third connecting portion (331), the lower end of the third connecting portion (331) is hinged to the base (1), the lower end of the second connecting piece (5) is hinged to the sixth connecting portion (334), the third connecting portion (331) and the fourth connecting portion (332) are arranged in a V-shaped mode, the connecting portion of the third connecting portion (331) and the fourth connecting portion (332) is located at the lowest position of the connecting sheet (33), and the seventh connecting portion (335) is located at the rear of the base (1).

6. A pallet according to claim 5, characterized in that the base (1) is further provided with two avoidance grooves (17), and the two avoidance grooves (17) are respectively located below the corresponding side connecting pieces (33).

7. A pallet according to claim 4, further comprising a fourth link (16), the second connecting seat (3) being hinged to the base (1) by means of the fourth link (16), said fourth link (16) being located below the third link (31).

8. A pallet as claimed in claim 1, further comprising a seventh link (51), a fifth link (22) and a sixth link (41), the fifth link (22) being provided at the rear of the first connecting seat (2), the upper end of the first connecting member (4) and the upper end of the second connecting member (5) being hinged to the first connecting seat (2) by the fifth link (22); the sixth connecting rod (41) is arranged at the rear part of the base (1), and the first connecting piece (4) is hinged with the base (1) through the sixth connecting rod (41); the seventh connecting rod (51) is arranged on the second connecting seat (3), and the second connecting piece (5) is hinged with the second connecting seat (3) through the seventh connecting rod (51); the sixth connecting rod (41) is positioned in front of the seventh connecting rod (51), the sixth connecting rod (41) is positioned below the second connecting seat (3), and the fifth connecting rod (22) is positioned between the sixth connecting rod (41) and the seventh connecting rod (51).

9. A pallet as claimed in claim 1, characterised in that the two elastic elements (6) are symmetrically arranged in the receiving groove (11).

10. A chair comprising a tray as claimed in any one of claims 1 to 9.