CN111904196A - Chair and swing tray thereof - Google Patents

Abstract

The invention discloses a chair and a swing tray thereof, comprising a second swing mechanism and a first swing mechanism. The first swing mechanism includes a first base, two first spring assemblies and a first connecting shaft. The first base The seat is fixedly connected with the seat, one end of the first spring assembly is connected with the first base and the other end is connected with the second swing mechanism, the first connecting shaft is fixedly connected with the first base, and the first connecting shaft is distributed along the X direction and can be It is rotatably installed on the second swinging mechanism, and the first base is installed on the second swinging mechanism through the first connecting shaft so as to be swingable left and right; through this technical solution, the original second swinging mechanism that can be tilted forward and backward is added. A first swinging mechanism that can swing left and right, and the added first swinging mechanism does not interfere with the internal structure of the second swinging mechanism, that is, the first swinging mechanism in this embodiment can be applied to any type of tray that can be tilted back and forth , which is versatile and simple in structure.

Description

A chair and its swing tray

technical field

The present invention relates to the technical field of chairs, in particular to a chair and a swing tray thereof.

Background technique

The seat backs of many existing seats (eg, office chairs) can be rotated to different angles in the front and rear with respect to the chassis, so as to improve the comfort of use.

In order to achieve the above-mentioned functions, the reclining seat mainly relies on the rotating connection structure and the locking mechanism between the tray for fixing the chair base and the seat back fixing frame for fixing the chair back to realize the reclining seat back and the adjustment of the chair. The function of the back inclination angle, and a spring member is usually installed on the shaft of the seat back fixing frame. The spring member generates a certain rebound force during the rotation of the seat back, so that the seat back can give With a certain back support, and after the locking mechanism is released, the spring member can also automatically restore the seat back to its original state.

However, this kind of swivel chair tray can only realize the lifting and lowering of the seat cushion, the adjustment of the tilt angle of the backrest, etc., and the functions are relatively simple. From a physiological point of view, a person who does not move for a long time will feel uncomfortable or fatigued. At the same time, due to insufficient blood supply to the brain and the weight of the whole body pressing on the bottom of the spine, it will cause various diseases such as memory loss, headache, dizziness, lumbar and cervical spine, etc. Bad for the body. However, when working or studying, due to the limitation of the current seat function, people cannot sway greatly from side to side when sitting, but can only lean forward or backward for relief; only leaning can not fundamentally relieve people The problem of long-term sitting fatigue requires a seat that can allow people to sway from side to side to move their bodies while sitting.

Therefore, the invention patent with the patent application number: "201910582221.7" discloses a swingable office seat. The left and right swing mechanism provided in the office seat includes rubber pieces located on both sides of the tail of the base shell, and located at the rear of the upper surface of the chassis. The left and right swing reset rubber piece, the rubber bush located at the front end of the upper surface of the chassis, the left and right swing reset rubber piece is fixed on the connecting seat, the middle of the connecting seat is provided with a screw, the connecting seat is welded on the chassis, the swing control switch, The other end of the rubber piece is fixedly connected with the lower end of the connecting arc-shaped plate of the base shell. The lower surface of the base shell corresponds to the middle of the two left and right swing reset rubber pieces with screw holes, and the lower surface of the base shell corresponds to the position of the rubber bush There is a limit hole for the rubber bushing, the screw rod passes through the fixing seat and the screw hole in turn, and the rubber bushing is inserted into the limit hole of the rubber bushing, so as to realize the connection between the base shell and the chassis.

In the specific application, the user applies force in any direction to the left and right, the screw and the rubber bushing are forced to rotate, which drives the base assembly to tilt to one side, compressing the rubber piece on one side and swinging the reset rubber piece left and right. Swing and reset under the action of the rubber parts, so that the base assembly can be swayed left and right. During the left and right swing of the base assembly, the chassis connecting parts are driven to move synchronously by the two rubber parts at the same time. Finally, the chassis connecting parts are realized by the action of the universal joint. The function of the backrest swaying left and right; although the above-mentioned seat can be swayed left and right, it is equipped with a large number of rubber parts and a more complex linkage mechanism, the installation is also more complicated, and the versatility is not enough, so it is difficult to achieve mass production.

Therefore, the Chinese patent document with publication number CN110710815A discloses a dynamic tray, comprising: a first base; a second base that is rotatably connected to the first base; a first crank, one end of the first crank is connected to the first base The base is hinged; the other end of the first crank is hinged with an elastic relay connecting piece, and the elastic relay connecting piece is used to connect the seat support; the second crank, the two ends of the second crank are respectively hinged with the second base and the receiving piece, The receiving part is rigid, and the receiving part is used to connect the seat support, and the receiving part is located at the upper end of the second base; the rocker is configured to connect the seat back assembly, and the rocker is integrated with the second crank; the elastic reset device, It is used to enable the rocker to move the second crank so that the second crank can be restored to its original position; the present invention adopts the principle of four connecting rods, and has the functions of lifting the seat and swinging left and right, and can automatically adapt to the configuration of the connecting seat. The sitting posture changes of the user leaning back and forth and swaying from side to side solve the drawbacks caused by prolonged sitting and meet the needs of different groups of people; although the structure of the dynamic tray has been simplified to a certain extent and no rubber parts are used, its structure is still relatively complex.

SUMMARY OF THE INVENTION

In order to solve the above problems, the purpose of the present invention is to overcome the deficiencies of the prior art, and provide a chair and its swing tray, which can swing left and right and can be tilted back and forth, and at the same time, the structure is very simple and versatile.

In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme:

A swing tray, comprising a second swing mechanism swinging along the X direction and a first swing mechanism swinging along the Y direction, the X direction and the Y direction are perpendicular to each other, the second swing mechanism is fixedly connected with a seat support rod, the The first swing mechanism is installed above the second swing mechanism and is fixedly connected with the seat, and is characterized in that:

The first swing mechanism includes a first base, two first spring assemblies and a first connecting shaft, the first base is fixedly connected to the seat, and the two first spring assemblies are respectively distributed on the first base. At the left and right ends of a base, one end of the first spring assembly is connected to the first base and the other end is connected to the second swing mechanism, the first connecting shaft is fixedly connected to the first base, and the first connection The shafts are distributed along the X direction and are rotatably mounted on the second swing mechanism, and the first base is rotatably mounted on the second swing mechanism through the first connecting shaft.

Preferably, the first spring assembly includes a first connecting piece, a spring and a second connecting piece, the first connecting piece is rotatably mounted on the first base, and the second connecting piece is rotatably mounted on the first base. On the second base, the first connecting piece and the second connecting piece are matched to make them approach or move away from each other, and the spring is sleeved and installed on part of the first connecting piece and part of the second connecting piece.

Preferably, the first connecting member includes a first shaft portion and a second shaft portion that are perpendicular to each other, the second connecting member includes a third shaft portion and a fourth shaft portion that are perpendicular to each other, and the first shaft portion can be The sleeve is rotatably mounted on the first base, the fourth shaft portion is rotatably mounted on the second base, the second shaft portion and the third shaft portion are coaxially distributed and the third shaft portion is slidable. The spring is installed on the second shaft portion, the spring is sleeved and installed on the second shaft portion and the third shaft portion, and the two ends of the spring are respectively abutted against the first shaft portion and the fourth shaft portion.

Preferably, the first shaft portion, the fourth shaft portion and the first connecting shaft are distributed in parallel, the distance difference between the first connecting shaft and the two first shaft portions is not more than 1 cm, and the first connecting shaft The distance difference between the connecting shaft and the two fourth shaft parts is not more than 1cm;

Wherein, when the first base is in a horizontal state, the distance in the horizontal direction between the first connecting shaft and the first shaft portion is greater than the distance between the first connecting shaft and the fourth shaft portion.

Preferably, a limit slot, a first installation hole and a pin are also provided, wherein the limit slot and the first installation hole are respectively located on the second shaft portion and the third shaft portion, and the plug is inserted and installed on the first shaft portion. in the mounting hole and slide in the limit slot.

Preferably, the second rocking mechanism includes a second base and a third base, the second base is located above the third base and is movably connected to the first base, and the third base is connected to the chair The seat support rod is fixedly connected, the second base is provided with a pressure block and two spring pieces, the pressure block is fixedly connected with the second base, the spring piece is fixedly connected with the pressure block, and the spring piece is fixedly connected with the pressure block. The two ends are respectively pressed on the front and rear second connecting shafts.

Preferably, the left and right sides of the second base are respectively provided with a first arc-shaped long hole and a second arc-shaped long hole, and the second connecting shaft is fixedly connected to the third base; or, the third The left and right sides of the base are respectively provided with a first arc-shaped long hole and a second arc-shaped long hole, and the second connecting shaft is fixedly connected with the second base;

Wherein, the first arc-shaped long hole and the second arc-shaped long hole are symmetrically distributed on the front and rear half of the second base or the third base, and both ends of a second connecting shaft are placed in the first arc-shaped long hole It can move along the first arc-shaped long hole, and the two ends of the other second connecting shaft are placed in the second arc-shaped long hole and can move along the second arc-shaped long hole.

Preferably, the spring sheet is fixedly installed on the pressing block by a fastener, and the distance difference between the fastener and the front and rear second connecting shafts is not more than 1 cm.

Preferably, the fourth shaft portion of the second connecting member is rotatably installed on the side surface of the second base, and the first connecting shaft is rotatably installed on the upper end surface of the second base.

A chair comprising a swing tray as described above.

The beneficial effects of the present invention are as follows: a first swing mechanism that can swing left and right is added to the original second swing mechanism that can be tilted back and forth, and the added first swing mechanism does not interfere with the internal structure of the second swing mechanism, That is, the first swing mechanism in this embodiment can be applied to any type of tray that can be tilted back and forth, and is versatile and simple in structure.

Description of drawings

Fig. 1 is the structural representation of the rocking tray of the present invention;

Fig. 2 is the exploded schematic diagram of the swing tray of the present invention;

3 is an exploded schematic view of the first spring assembly of the present invention.

Reference numerals: 1, the first base; 2, the first connecting shaft; 3, the first connecting piece; 4, the spring; 5, the second connecting piece; 30, the first shaft part; 31, the second shaft part; 50, the third shaft part; 51, the fourth shaft part; 52, the limit slot; 32, the first installation hole; 6, the second base; 7, the third base; 8, the second connecting shaft; 9, spring sheet; 10, pressing block; 60, first arc-shaped long hole; 61, second arc-shaped long hole.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise", etc. The orientation or positional relationship shown in the figures is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a reference to the present invention. Invention limitations.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise expressly defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

Example 1:

In this embodiment, as shown in Fig. 1 and Fig. 2, a swing tray includes a second swing mechanism swinging along the X direction and a first swing mechanism swinging along the Y direction. The X direction and the Y direction are perpendicular to each other, so The second swing mechanism is fixedly connected to the seat support rod, the first swing mechanism is installed above the second swing mechanism and is fixedly connected to the seat, wherein the X direction refers to the front and rear direction, and the Y direction refers to the left and right direction.

In other embodiments, the X direction may also refer to the left and right direction, and the Y direction refers to the front and rear direction, that is, the second swing mechanism that swings left and right is fixedly connected to the seat support rod, and the first swing mechanism that swings back and forth is connected to the seat. Seat fixed connection.

In this embodiment, the first swing mechanism includes a first base 1, two first spring assemblies and a first connecting shaft 2, the first base 1 is fixedly connected with the seat, and the two The first spring assemblies are respectively distributed at the left and right ends of the first base 1 , one end of the first spring assembly is connected to the first base 1 and the other end is connected to the second swing mechanism, and the first connecting shaft 2 is connected to the first base 1 . The first base 1 is fixedly connected, the first connecting shaft 2 is distributed along the front-rear direction and can be rotatably installed on the second swing mechanism, and the first base 1 can be swingably installed on the second swing mechanism through the first connecting shaft 2. on the second swing mechanism.

This arrangement is equivalent to adding a first swing mechanism that can swing left and right to the original second swing mechanism that can be tilted back and forth, and the added first swing mechanism does not interfere with the internal structure of the second swing mechanism. The first swing mechanism in the example can be applied to any type of pallet that can be tilted back and forth, and is versatile and simple in structure.

In this embodiment, as shown in FIG. 3 , the first spring assembly includes a first connecting member 3 , a spring 4 and a second connecting member 5 , and the first connecting member 3 includes a first shaft portion 30 that is perpendicular to each other and the second shaft portion 31, the second connecting member 5 includes a third shaft portion 50 and a fourth shaft portion 51 that are perpendicular to each other, the first shaft portion 30 is rotatably mounted on the first base 1, so The fourth shaft portion 51 is rotatably installed on the second swing mechanism, the second shaft portion 31 and the third shaft portion 50 are coaxially distributed, and the third shaft portion 50 is slidably sleeved and installed on the second shaft portion 31 , the spring 4 is sleeved and installed on the second shaft portion 31 and the third shaft portion 50 , and the two ends of the spring 4 are respectively abutted against the first shaft portion 30 and the fourth shaft portion 51 . In this way, the first connecting piece 3 is rotatably connected with the first base 1, the second connecting piece 5 is rotatably connected with the second rocking mechanism, and the first connecting piece 3 and the second connecting piece 5 cooperate to form a retractable piece , so that the first spring assembly can provide a certain elastic force when swinging, and the flexibility of swinging is improved. When not swinging, the first spring assembly urges the first base 1 to reset.

In this embodiment, the first shaft portion 30 , the fourth shaft portion 51 and the first connecting shaft 2 are distributed in parallel, and the distance between the first connecting shaft 2 and the two first shaft portions 30 is different Not more than 1cm, the distance difference between the first connecting shaft 2 and the two fourth shaft parts 51 is not more than 1cm; further preferably, the distance between the first connecting shaft 2 and the two first shaft parts 30 equal, the distances between the first connecting shaft 2 and the two fourth shaft portions 51 are the same. The purpose of this setting is to ensure that when the first base 1 swings back and forth with the first connecting shaft 2 as the rotation center axis, the amplitude and difficulty of swinging to the left and swinging to the right are as consistent as possible, improving people's use. time comfort.

In this embodiment, when the first base 1 is in a horizontal state, the distance in the horizontal direction between the first connecting shaft 2 and the first shaft portion 30 is greater than that between the first connecting shaft 2 and the fourth shaft The distance between the parts 51 is set to prevent the first spring assembly from colliding with the second rocking mechanism during the left and right rocking of the first base 1 .

In this embodiment, a plug is also provided, the third shaft portion 50 is provided with a limiting groove 52, the second shaft portion 31 is provided with a first installation hole 32, and the plug is inserted and installed in the first The installation hole 32 slides in the limiting slot 52 ; this setting is to limit the maximum amplitude of the left and right swinging of the first base 1 .

In other embodiments, the limiting groove 52 may also be located on the second shaft portion 31 , and the corresponding first mounting hole 32 is located on the third shaft portion 50 .

In this embodiment, the second rocking mechanism includes a second base 6 and a third base 7, and the second base 6 and the third base 7 are movably connected by two front and rear second connecting shafts 8, The second base 6 is located above the third base 7 and is movably connected to the first base 1 , the third base 7 is fixedly connected to the seat support rod, and the second base 6 is provided with A pressure block 10 and two spring sheets 9, the pressure block 10 is fixedly connected with the second base 6, the spring sheet 9 is fixedly connected with the pressure block 10, and the two ends of the spring sheet 9 are respectively pressed on the front and rear sides. On the second connecting shaft 8; in this way, the third base 7 is fixed, the second base 6 swings back and forth relative to the third base 7, the first base 1 swings left and right relative to the second base 6, Furthermore, the swing tray can swing in four directions, front, rear, left, right, and has a simple structure and low cost.

In this embodiment, the left and right sides of the second base 6 are respectively provided with a first arc-shaped long hole 60 and a second arc-shaped long hole 61 , and the second connecting shaft 8 is fixed to the third base 7 . Alternatively, the left and right sides of the third base 7 are respectively provided with a first arc-shaped elongated hole 60 and a second arc-shaped elongated hole 61, and the second connecting shaft 8 is fixedly connected to the second base 6;

The first arc-shaped elongated hole 60 and the second arc-shaped elongated hole 61 are symmetrically distributed on the front and rear half of the second base 6 or the third base 7, and both ends of a second connecting shaft 8 are placed on the second base 6 or the third base 7. One arc-shaped elongated hole 60 can move along the first arc-shaped elongated hole 60 , and both ends of the other second connecting shaft 8 are placed in the second arc-shaped elongated hole 61 and can move along the second arc-shaped elongated hole 61 move.

In this embodiment, the spring sheet 9 is fixedly installed on the pressing block 10 by a fastener, and the distance between the fastener and the front and rear second connecting shafts 8 is not more than 1 cm. The distances between the fasteners and the front and rear second connecting shafts 8 are equal. The purpose of this arrangement is to keep the amplitude and difficulty of the second base 6 as consistent as possible when it swings forward and backward, so as to improve the comfort of people when using it.

Further preferably, the portion of the pressing block 10 in contact with the spring sheet 9 is provided with rounded corners.

In this embodiment, the fourth shaft portion 51 of the second connecting member 5 is rotatably mounted on the side surface of the second base 6 , and the first connecting shaft 2 is rotatably mounted on the second base 6 on the upper end face.

A chair comprising a rocking tray as described above.

Embodiment 2:

The difference between this embodiment and the first embodiment is that the structure of the second rocking mechanism is different.

Among them, the specific structure of the second rocking mechanism can refer to the structure of the tray with the publication numbers CN207898260U, CN206612438U, CN103169283B, CN209825886U, CN209377130U, CN209360111U, CN209073846U, CN106889799A, CN205053405U. The base that is fixedly connected to the seat in the original structure is movably connected to the first swinging mechanism in the first embodiment to form a tray that can swing left and right front and rear.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those of ordinary skill in the art will not depart from the principles and spirit of the present invention Variations, modifications, substitutions, and alterations to the above-described embodiments are possible within the scope of the present invention without departing from the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A swing tray comprises a second swing mechanism swinging along the X direction and a first swing mechanism swinging along the Y direction, the X direction and the Y direction are mutually vertical, the second swing mechanism is fixedly connected with a seat support rod, the first swing mechanism is arranged above the second swing mechanism and is fixedly connected with a seat, the swing tray is characterized in that,

first swing mechanism includes a first base (1), two first spring (4) subassemblies and a first connecting axle (2), first base (1) and seat support fixed connection, first connecting axle (2) and first base (1) fixed connection, first connecting axle (2) distribute and rotatable the installing on second swing mechanism along the X direction, two first spring (4) subassemblies distribute respectively in the relative both sides of first connecting axle (2), first spring (4) subassembly one end is connected and the other end is connected with second swing mechanism with first base (1), first base (1) can follow Y direction wobbling through first connecting axle (2) and install on second swing mechanism.

2. The swing tray according to claim 1, wherein the first spring assembly comprises a first connecting member (3), a spring (4) and a second connecting member (5), the first connecting member (3) is rotatably mounted on the first base (1), the second connecting member (5) is rotatably mounted on the second base (6), the first connecting member (3) and the second connecting member (5) are matched to enable the first connecting member and the second connecting member to approach or separate from each other, and the spring (4) is sleeved on part of the first connecting member (3) and part of the second connecting member (5).

3. The swing tray as claimed in claim 2, wherein the first connecting member (3) comprises a first shaft portion (30) and a second shaft portion (31) perpendicular to each other, the second connecting member (5) comprises a third shaft portion (50) and a fourth shaft portion (51) perpendicular to each other, the first shaft portion (30) is rotatably mounted on the first base (1), the fourth shaft portion (51) is rotatably mounted on the second base (6), the second shaft portion (31) and the third shaft portion (50) are coaxially distributed, the third shaft portion (50) is slidably sleeved on the second shaft portion (31), the spring (4) is sleeved on the second shaft portion (31) and the third shaft portion (50), and two ends of the spring (4) are respectively abutted against the first shaft portion (30) and the fourth shaft portion (51).

4. A rocking tray as claimed in claim 3, characterised in that the first (30), fourth (51) and first connecting shafts (2) are arranged in parallel, the difference in distance between the first connecting shaft (2) and the two first shaft parts (30) being not more than 1cm, the difference in distance between the first connecting shaft (2) and the two fourth shaft parts (51) being not more than 1 cm;

wherein, when the first base (1) is in a horizontal state, a distance in a horizontal direction between the first connecting shaft (2) and the first shaft portion (30) is larger than a distance between the first connecting shaft (2) and the fourth shaft portion (51).

5. The swing tray as claimed in claim 3, further comprising a limiting groove (52), a first mounting hole (32) and a bolt, wherein the limiting groove (52) and the first mounting hole (32) are respectively located on the second shaft portion (31) and the third shaft portion (50), and the bolt is inserted and mounted in the first mounting hole (32) and slides in the limiting groove (52).

6. The tray of claim 1, wherein the second swing mechanism comprises a second base (6) and a third base (7), the second base (6) is located above the third base (7) and movably connected with the first base (1), the third base (7) is fixedly connected with the seat support supporting rod, the second base (6) is provided with a pressing block (10) and two spring (4) pieces, the pressing block (10) is fixedly connected with the second base (6), the spring (4) pieces are fixedly connected with the pressing block (10), and two ends of the spring (4) pieces are respectively pressed on the front and back second connecting shafts (8).

7. The swing tray as claimed in claim 6, wherein the left and right side surfaces of the second base (6) are respectively provided with a first arc-shaped long hole (60) and a second arc-shaped long hole (61), and the second connecting shaft (8) is fixedly connected with the third base (7); or the left side surface and the right side surface of the third base (7) are respectively provided with a first arc-shaped long hole (60) and a second arc-shaped long hole (61), and the second connecting shaft (8) is fixedly connected with the second base (6);

the first arc-shaped long hole (60) and the second arc-shaped long hole (61) are symmetrically distributed at the front half section and the rear half section of the second base (6) or the third base (7), two ends of one second connecting shaft (8) are arranged in the first arc-shaped long hole (60) and can move along the first arc-shaped long hole (60), and two ends of the other second connecting shaft (8) are arranged in the second arc-shaped long hole (61) and can move along the second arc-shaped long hole (61).

8. The rocking tray of claim 6, wherein the spring (4) is fixedly mounted to the pressure piece (10) by means of fasteners, the distance between the fasteners and the two second connecting shafts (8) being not more than 1 cm.

9. A rocking tray as claimed in claim 2, characterised in that the fourth shaft portion (51) of the second link (5) is rotatably mounted on the side of the second base (6), and the first link shaft (2) is rotatably mounted on the upper end face of the second base (6).

10. A chair comprising a rocking tray according to any one of claims 1 to 9.

Images