Chair and rocking tray thereof

Abstract

The present invention discloses a chair and a swing tray thereof, comprising a second swing mechanism and a first swing mechanism, wherein the first swing mechanism comprises a first base, two first spring assemblies and a first connecting shaft, wherein the first base is fixedly connected to the chair seat, 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, the first connecting shaft is distributed along the X direction and is rotatably installed on the second swing mechanism, and the first base is installed on the second swing mechanism so as to be swingable left and right through the first connecting shaft; through the technical solution, a first swing mechanism capable of swinging left and right is added to the original second swing mechanism capable of tilting forward and backward, 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 the present embodiment can be applied to any type of tray capable of tilting forward and backward, has universality, and has a simple structure.

Description

Technical Field

[0001] The invention relates to the technical field of chairs, in particular to a chair and a rocking tray thereof. Background Art

[0002] The backrests of many existing seats (such as office chairs) can be rotated forward and backward to different angles relative to the chassis to improve the comfort of use.

[0003] In order to achieve the above functions, this reclining chair mainly relies on the rotating connection structure between the tray fixing the chair base and the seat back fixing frame fixing the chair back, as well as the locking mechanism to realize the functions of lying down the seat back and adjusting the inclination angle of the seat back, and a spring member is usually installed on the rotating 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 provide a certain back support when the user lies down, and after releasing the locking mechanism, the spring member can also allow the seat back to automatically restore to its initial state.

[0004] However, this swivel chair tray can only realize the lifting and lowering of the seat cushion and the adjustment of the backrest angle, and its functions are relatively simple. From a physiological point of view, a person will feel uncomfortable or tired if he sits still for a long time. At the same time, it will also cause various diseases such as memory loss, headache, dizziness, lumbar spine and cervical spine due to insufficient blood supply to the brain and the weight of the whole body on the bottom of the spine, which is not good for the body. When working or studying, due to the limitations of the current chair functions, people cannot swing left and right when sitting, but can only lean forward or backward to relieve; only leaning back cannot fundamentally alleviate the problem of people's fatigue from sitting for a long time, so a chair that allows people to swing left and right to move their bodies when sitting is needed.

[0005] Therefore, the invention patent with patent application number: "201910582221.7" discloses a swingable office chair, the left and right swing mechanism of the office chair includes rubber parts located on both sides of the tail of the base shell, left and right swing reset rubber parts located at the rear of the upper surface of the chassis, and rubber sleeves located at the front end of the upper surface of the chassis. The left and right swing reset rubber parts are fixedly arranged on the connecting seat, and a screw is arranged in the middle position of the connecting seat. The connecting seat is welded on the chassis and a swing control switch. The other end of the rubber part is fixedly connected to the lower end of the arc plate connected to the base shell, and a screw through-hole is arranged on the lower surface of the base shell corresponding to the middle position of the two left and right swing reset rubber parts. A rubber sleeve limiting hole is arranged at the position of the rubber sleeve corresponding to the lower surface of the base shell. The screw passes through the fixed seat, the screw through-hole and the rubber sleeve are inserted into the rubber sleeve limiting hole in turn to realize the connection between the base shell and the chassis.

[0006] In specific applications, the user applies force in any direction to the left or right, and the screw and the rubber sleeve rotate under the force, driving the base assembly to tilt to one side, compressing the rubber part on one side and the left-right swing reset rubber part, and resetting it under the action of the other rubber part and the left-right swing reset rubber part, so that the base assembly can swing left and right. During the left-right swinging process of the base assembly, the chassis connecting parts are driven to move synchronously through the two rubber parts. Finally, the chassis connecting parts realize the left-right swinging function of the backrest with the help of the universal joint. Although the above-mentioned seat can realize left-right swinging, it is equipped with a large number of rubber parts and a more complicated linkage mechanism, and the installation is also more complicated. It is not universal enough and it is difficult to achieve large-scale mass production.

[0007] Therefore, the Chinese patent document with publication number CN110710815A discloses a dynamic tray, comprising: a first base; a second base connected to the first base for left-right rotation; a first crank, one end of the first crank is hinged to the first base; the other end of the first crank is hinged to an elastic transfer connector, and the elastic transfer connector is used to connect the seat support; a second crank, the two ends of the second crank are respectively hinged to the second base and the receiving member, the receiving member is rigid, and the receiving member is used to connect the seat support, and the receiving member is located at the upper end of the second base; The plate is configured to connect the chair back assembly, and the rocker is connected to the second crank as a whole; the elastic reset device is used to enable the rocker to pry the second crank to move so that the second crank can return to its original position; the present invention is constructed using the four-bar principle, and has the functions of seat lifting and lowering and left and right swinging. When configured to connect the seat, it can automatically adapt to the user's sitting posture changes of leaning back and forth and swinging left and right, solve the disadvantages caused by sitting for a long time, and meet the needs of different groups of people; although the dynamic tray has been simplified in structure to a certain extent and no longer uses rubber parts, its structure is still relatively complex. Summary of the invention

[0008] In order to solve the above problems, the purpose of the present invention is to overcome the shortcomings of the prior art and provide a chair and a rocking tray thereof, which can rock left and right and tilt forward and backward, and at the same time is very simple in structure and has universality.

[0009] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0010] A swing tray comprises a second swing mechanism swinging along an X direction and a first swing mechanism swinging along a Y direction, the X direction and the Y direction are perpendicular to each other, the second swing mechanism is fixedly connected to a seat support rod, the first swing mechanism is installed above the second swing mechanism and is fixedly connected to the seat, characterized in that:

[0011] 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. The two first spring assemblies are respectively distributed at the left and right ends of the first 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. The first connecting shaft is distributed along the X direction and is rotatably installed on the second swing mechanism. The first base is installed on the second swing mechanism so as to be swingable left and right through the first connecting shaft.

[0012] Preferably, the first spring assembly includes a first connecting member, a spring and a second connecting member, the first connecting member is rotatably mounted on the first base, the second connecting member is rotatably mounted on the second base, the first connecting member and the second connecting member are matched to make them approach or move away from each other, and the spring sleeve is mounted on part of the first connecting member and part of the second connecting member.

[0013] Preferably, the first connecting member includes a first shaft portion and a second shaft portion which are perpendicular to each other, the second connecting member includes a third shaft portion and a fourth shaft portion which are perpendicular to each other, the first shaft portion 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 slidably mounted on the second shaft portion, the spring is mounted on the second shaft portion and the third shaft portion, and both ends of the spring are respectively against the first shaft portion and the fourth shaft portion.

[0014] Preferably, the first shaft portion, the fourth shaft portion and the first connecting shaft are arranged in parallel, the distance difference between the first connecting shaft and the two first shaft portions does not exceed 1 cm, and the distance difference between the first connecting shaft and the two fourth shaft portions does not exceed 1 cm;

[0015] Wherein, when the first base is in a horizontal state, a distance between the first connecting axis and the first shaft portion in a horizontal direction is greater than a distance between the first connecting axis and the fourth shaft portion.

[0016] Preferably, a limiting groove, a first mounting hole and a latch are further provided, wherein the limiting groove and the first mounting hole are respectively located on the second shaft portion and the third shaft portion, and the latch is inserted and installed in the first mounting hole and slides in the limiting groove.

[0017] Preferably, the second rocking mechanism comprises a second base and a third base, the second base is located above the third base and is movably connected to the first base, the third base is fixedly connected to the seat support rod, the second base is provided with a pressure block and two spring sheets, the pressure block is fixedly connected to the second base, the spring sheet is fixedly connected to the pressure block, and the two ends of the spring sheet are respectively pressed on the front and rear second connecting shafts.

[0018] 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 left and right sides of the third 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 second base;

[0019] Among them, the first arc-shaped long hole and the second arc-shaped long hole are symmetrically distributed in the front and rear halves of the second base or the third base, both ends of a second connecting shaft are placed in the first arc-shaped long hole and can move along the first arc-shaped long hole, and both ends of another second connecting shaft are placed in the second arc-shaped long hole and can move along the second arc-shaped long hole.

[0020] Preferably, the spring sheet is fixedly mounted on the pressing block by a fastener, and the distance difference between the fastener and the front and rear second connecting shafts does not exceed 1 cm.

[0021] Preferably, the fourth shaft portion in the second connecting member is rotatably mounted on the side surface of the second base, and the first connecting shaft is rotatably mounted on the upper end surface of the second base.

[0022] A chair comprises a rocking tray as described above.

[0023] The beneficial effects of the present invention are as follows: a first swinging mechanism that can swing left and right is added to the original second swinging mechanism that can tilt forward and backward, 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 tray that can tilt forward and backward, has universality, and has a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a swing tray of the present invention;

[0025] Figure 2 It is an exploded schematic diagram of the swing tray of the present invention;

[0026] Figure 3 It is an exploded schematic diagram of the first spring assembly of the present invention.

[0027] Figure numerals: 1, first base; 2, first connecting shaft; 3, first connecting member; 4, spring; 5, second connecting member; 30, first shaft portion; 31, second shaft portion; 50, third shaft portion; 51, fourth shaft portion; 52, limiting groove; 32, first mounting hole; 6, second base; 7, third base; 8, second connecting shaft; 9, spring sheet; 10, pressure block; 60, first arc-shaped long hole; 61, second arc-shaped long hole. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] Embodiment 1:

[0034] In this embodiment, if Figure 1 and Figure 2 As shown, 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, 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-to-back direction, and the Y direction refers to the left-to-right direction.

[0035] In other embodiments, the X direction may also refer to the left-right direction, and the Y direction may refer to the front-back direction, that is, the second swing mechanism that swings left-right is fixedly connected to the seat support rod, and the first swing mechanism that swings front-back is fixedly connected to the seat.

[0036] 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 to the seat, the two 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, the first connecting shaft 2 is fixedly connected to the first base 1, the first connecting shaft 2 is distributed along the front-to-back direction and is rotatably installed on the second swing mechanism, and the first base 1 is installed on the second swing mechanism so as to be swingable left and right through the first connecting shaft 2.

[0037] Such a configuration is equivalent to adding a first swinging mechanism that can swing left and right to the original second swinging mechanism that can tilt forward and backward, 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 tray that can tilt forward and backward, is universal, and has a simple structure.

[0038] In this embodiment, if Figure 3As shown, the first spring assembly includes a first connecting member 3, a spring 4, and a second connecting member 5. The first connecting member 3 includes a first shaft portion 30 and a second shaft portion 31 which are perpendicular to each other. The second connecting member 5 includes a third shaft portion 50 and a fourth shaft portion 51 which are perpendicular to each other. The first shaft portion 30 is rotatably mounted on the first base 1, and the fourth shaft portion 51 is rotatably mounted 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 mounted on the second shaft portion 31. The spring 4 is mounted on the second shaft portion 31 and the third shaft portion 50, and the two ends of the spring 4 are respectively against the first shaft portion 30 and the fourth shaft portion 51. In this way, the first connecting member 3 is rotatably connected to the first base 1, the second connecting member 5 is rotatably connected to the second swing mechanism, and the first connecting member 3 and the second connecting member 5 cooperate to form a retractable member, so that the first spring assembly can provide a certain elastic force when swinging, thereby improving the flexibility of the swing. When not swinging, the first spring assembly prompts the first base 1 to reset.

[0039] In this embodiment, the first shaft portion 30, the fourth shaft portion 51 and the first connecting shaft 2 are arranged in parallel, the distance difference between the first connecting shaft 2 and the two first shaft portions 30 does not exceed 1 cm, and the distance difference between the first connecting shaft 2 and the two fourth shaft portions 51 does not exceed 1 cm; further preferably, the distance between the first connecting shaft 2 and the two first shaft portions 30 is equal, and the distance between the first connecting shaft 2 and the two fourth shaft portions 51 is equal. This arrangement 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 its swinging to the left and to the right are as consistent as possible, so as to improve the comfort of people when using it.

[0040] In this embodiment, when the first base 1 is in a horizontal state, the distance between the first connecting axis 2 and the first shaft portion 30 in the horizontal direction is greater than the distance between the first connecting axis 2 and the fourth shaft portion 51; this arrangement is to prevent the first spring assembly from colliding with the second swing mechanism during the left and right swinging of the first base 1.

[0041] In this embodiment, a latch is also provided, a limiting groove 52 is provided on the third shaft portion 50, a first mounting hole 32 is provided on the second shaft portion 31, and the latch is inserted and installed in the first mounting hole 32 and slides in the limiting groove 52; this arrangement is to limit the maximum amplitude of the left and right swing of the first base 1.

[0042] 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 .

[0043] In this embodiment, the second swing 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, and the third base 7 is fixedly connected to the seat support rod. A pressure block 10 and two spring sheets 9 are provided on the second base 6, and the pressure block 10 is fixedly connected to the second base 6, and the spring sheet 9 is fixedly connected to the pressure block 10, and the two ends of the spring sheet 9 are respectively pressed on the front and rear second connecting shafts 8; in this way, the third base 7 is fixed, the second base 6 swings forward and backward relative to the third base 7, and the first base 1 swings left and right relative to the second base 6, so that the swing tray can realize swinging in four directions of front, back, left and right, and has a simple structure and low cost.

[0044] 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 fixedly connected to the third base 7; or, the left and right sides 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 to the second base 6;

[0045] Among them, the first arc-shaped long hole 60 and the second arc-shaped long hole 61 are symmetrically distributed in the front and rear halves of the second base 6 or the third base 7, both ends of a second connecting shaft 8 are placed in the first arc-shaped long hole 60 and can move along the first arc-shaped long hole 60, and both ends of another second connecting shaft 8 are placed in the second arc-shaped long hole 61 and can move along the second arc-shaped long hole 61.

[0046] In this embodiment, the spring sheet 9 is fixedly mounted on the pressing block 10 by a fastener, and the distance difference between the fastener and the front and rear second connecting shafts 8 is no more than 1 cm. More preferably, the distances between the fastener and the front and rear second connecting shafts 8 are equal. This arrangement is to ensure that the amplitude and difficulty of the second base 6 when swinging forward and backward are as consistent as possible, thereby improving the comfort of people when using it.

[0047] Further preferably, a portion of the pressing block 10 that contacts the spring sheet 9 is provided with a rounded corner.

[0048] In this embodiment, the fourth shaft portion 51 in 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 upper end surface of the second base 6 .

[0049] A chair comprises the rocking tray as described above.

[0050] Embodiment 2:

[0051] The difference between this embodiment and the first embodiment is that the structure of the second swing mechanism is different.

[0052] Among them, the specific structure of the second swing mechanism can refer to the structure of the tray that can tilt forward and backward disclosed in publication numbers CN207898260U, CN206612438U, CN103169283B, CN209825886U, CN209377130U, CN209360111U, CN209073846U, CN106889799A, and CN205053405U. Generally speaking, it is only necessary to flexibly connect the base fixedly connected to the seat in the original structure with the first swing mechanism in Example 1 to form a tray that can swing left and right, forward and backward.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0054] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A swing tray, comprising a second swing mechanism swinging in the X direction and a first swing mechanism swinging in the Y direction, the X direction and the Y direction are perpendicular to each other, 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, characterized in that: The first swing mechanism comprises a first base (1), two first spring assemblies and a first connecting shaft (2); the first base (1) is fixedly connected to the seat, the first connecting shaft (2) is fixedly connected to the first base (1), the first connecting shaft (2) is distributed along the X direction and is rotatably mounted on the second swing mechanism, the two first spring assemblies are respectively distributed on opposite sides of the first connecting shaft (2), 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 base (1) is mounted on the second swing mechanism so as to be swingable along the Y direction via the first connecting shaft (2); 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 a first base (1); the second connecting member (5) is rotatably mounted on a second base (6); the first connecting member (3) and the second connecting member (5) are matched so as to move closer to or farther from each other; the spring (4) is sleeved and mounted on part of the first connecting member (3) and part of the second connecting member (5); 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 is movably connected to the first base (1), the third base (7) is fixedly connected to the seat support rod, a pressing block (10) and two spring sheets (9) are provided on the second base (6), the pressing block (10) is fixedly connected to the second base (6), the spring sheet (9) is fixedly connected to the pressing block (10), and the two ends of the spring sheet (9) are respectively pressed on the front and rear second connecting shafts (8); The first connecting shaft (2) is rotatably mounted on the upper end surface of the second base (6).

2. A swing tray according to claim 1, characterized in that: The first connecting member (3) comprises a first shaft portion (30) and a second shaft portion (31) which are perpendicular to each other, and the second connecting member (5) comprises a third shaft portion (50) and a fourth shaft portion (51) which are perpendicular to each other, the first shaft portion (30) is rotatably mounted on the first base (1), and 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 and the third shaft portion (50) is slidably mounted on the second shaft portion (31), the spring (4) is mounted on the second shaft portion (31) and the third shaft portion (50), and two ends of the spring (4) are respectively against the first shaft portion (30) and the fourth shaft portion (51).

3. A swing tray according to claim 2, characterized in that: The first shaft portion (30), the fourth shaft portion (51) and the first connecting shaft (2) are arranged in parallel, the distance difference between the first connecting shaft (2) and the two first shaft portions (30) does not exceed 1 cm, and the distance difference between the first connecting shaft (2) and the two fourth shaft portions (51) does not exceed 1 cm; Wherein, when the first base (1) is in a horizontal state, the distance between the first connecting shaft (2) and the first shaft portion (30) in the horizontal direction is greater than the distance between the first connecting shaft (2) and the fourth shaft portion (51).

4. A swing tray according to claim 2, characterized in that: A limiting groove (52), a first mounting hole (32) and a latch are also provided, 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 latch is inserted and installed in the first mounting hole (32) and slides in the limiting groove (52).

5. A swing tray according to claim 1, characterized in that: A first arc-shaped long hole (60) and a second arc-shaped long hole (61) are respectively provided on the left and right sides of the second base (6), and the second connecting shaft (8) is fixedly connected to the third base (7); or, a first arc-shaped long hole (60) and a second arc-shaped long hole (61) are respectively provided on the left and right sides of the third base (7), and the second connecting shaft (8) is fixedly connected to the second base (6); The first arc-shaped long hole (60) and the second arc-shaped long hole (61) are symmetrically distributed in the front and rear halves of the second base (6) or the third base (7); two ends of a second connecting shaft (8) are placed in the first arc-shaped long hole (60) and can move along the first arc-shaped long hole (60); two ends of another second connecting shaft (8) are placed in the second arc-shaped long hole (61) and can move along the second arc-shaped long hole (61).

6. A swing tray according to claim 5, characterized in that: The spring sheet (9) is fixedly mounted on the pressing block (10) via a fastener, and the distance difference between the fastener and the front and rear second connecting shafts (8) does not exceed 1 cm.

7. A swing tray according to claim 2, characterized in that: The fourth shaft portion (51) in the second connecting member (5) is rotatably mounted on the side surface of the second base (6).

8. A chair, characterized in that: It comprises a rocking tray according to any one of claims 1-7.

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