Seat Tray Convenient for Packaging and Transportation

Abstract

The present disclosure provides a seat tray convenient for packaging and transportation, which comprises a tray body, on which a height adjusting lever for adjusting the height of a seat and a backrest adjusting lever for adjusting the backrest angle are provided; the height adjusting lever and the backrest adjusting lever are disposed along the transverse direction of the tray body, a detachably connected height adjusting handle is sleeved on the height adjusting lever, and a detachably connected backrest adjusting handle is sleeved on the backrest adjusting lever; the height adjusting handle and the backrest adjusting handle are detachable, so that the transverse width of the tray body is reduced in the packaging process, and the height adjusting handle and the backrest adjusting handle can be packaged independently, thus saving the packaging space.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority of Chinese Patent Application No. CN202421801533.5 filed on Jul. 29, 2024, which is entitled “Seat Tray Convenient for Packaging and Transportation”, the entire contents of which, including the amendments thereof, are all incorporated herein by reference.TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of seat trays, particularly a seat tray convenient for packaging and transportation.BACKGROUND

[0003] A seat tray is the core component of the office chair, and a height adjusting handle for adjusting the height of the cushion and a backrest adjusting handle for adjusting the backrest angle are usually be installed on the seat tray.

[0004] CN patent No. CN202010523918.X discloses a seat tray structure and an office seat, which comprises a base, a large tray, a flip cover and a supporting seat, wherein a third pin is fixed at one end, away from the large tray, of the supporting seat, a movable hole for the third pin to penetrate through is formed in the flip cover, and the inner wall of the movable hole and the outer wall of the third pin are arranged at intervals; an adjusting seat is fixed at the bottom of the supporting seat; at least two gear grooves are formed in the side, close to the base, of the adjusting base. An adjusting rod is rotationally connected to the base and is connected with a locking plate through a connecting mechanism; the middle part of the locking plate is rotationally mounted on the base; the connecting mechanism comprises an adjusting block fixed to the adjusting rod, a telescopic elastic force storage piece with one end connected to the adjusting block and the other end connected to the locking plate, a positioning protrusion is fixed to the adjusting block in the telescopic direction of the elastic force storage piece along the connecting line of the two end points of the elastic force storage piece, and an elastic limiting base is installed at the position, below the adjusting block, of the base.

[0005] U.S. Pat. No. 9,788,657 discloses a chair tray and chassis, chassis forming method and chassis mounting structure of the same. The chair tray comprises a middle plate and a rotating lever. The middle plate is provided with a rotating shaft which is connected with the chassis through the rotating shaft. The middle plate is provided with a through hole through which the air supply spring passes. The rotating lever is provided with a bending part for connecting the gas spring. A return torsion spring is disposed on the rotating lever, and the return torsion spring keeps the bending part on the gas spring.

[0006] U.S. Pat. No. 7,293,832 discloses a seat adjusting device, which comprises a base, the base comprises two side walls, and a chamber is defined at the top thereof. The positioning mechanism is accommodated in the cavity of the base, and the operating handle movably extends through one of the two side walls of the base. The movable joint between the distal end of the operating handle and the fixed member includes two positioning holes. Two elastic projections extend between the two positioning holes, and a gap is formed between the two projections, so that the distal end of the operating handle can move through the gap when it is engaged with any positioning hole.

[0007] The seat trays disclosed above cannot be detached from the seat tray because the adjusting lever and the adjusting handle are integrated. When the seat tray needs to be packaged, the adjusting handle extends outward along the seat tray, which inevitably leads to the problems of wasting space and affecting the number of products packed in cabinets.SUMMARY

[0008] In order to overcome the defects in the prior art, the present disclosure provides a seat tray with detachable handles, saving packaging space, increasing the quantity of seat trays loaded in a container, thereby reducing the transportation cost of individual trays and facilitating packaging and transportation.

[0009] In order to achieve the object of the present disclosure, the present disclosure adopts the following technical solution: a seat tray includes a tray body, wherein a height adjusting lever for adjusting a height of a seat and a backrest adjusting lever for adjusting a backrest angle are provided on the tray body; wherein the height adjusting lever and the backrest adjusting lever are disposed along a length direction of the tray body and respectively extend along a transverse direction of the tray body, the height adjusting lever is detachably connected with a height adjusting handle, and the backrest adjusting lever is detachably connected with a backrest adjusting handle; the height adjusting handle is disposed along a length of the height adjusting lever, and a first inserting section inserted into the height adjusting handle is formed at an end of the height adjusting lever; and a first connecting hole is formed on the first inserting section, and a first waist-shaped hole corresponding to the first connecting hole is formed on the height adjusting handle; the backrest adjusting handle is disposed along a length of the backrest adjusting lever, and a second inserting section inserted into the backrest adjusting handle is formed at an end of the backrest adjusting lever; and a second connecting hole is formed on the second inserting section, and a second waist-shaped hole corresponding to the second connecting hole is formed on the backrest adjusting handle; a sunken groove is formed in the middle of the first inserting section and / or the second inserting section, and a covering block corresponding to the sunken groove is formed at the end of the corresponding height adjusting handle and / or backrest adjusting handle.BRIEF DESCRIPTION OF DRAWINGS

[0010] The drawings, which constitute a part of this application, are used to provide a further understanding of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure, and do not constitute undue limitations on the present disclosure. In the attached drawings:

[0011] FIG. 1 is a structural schematic diagram of the present disclosure;

[0012] FIG. 2 is a top view of the present disclosure;

[0013] FIG. 3 is a schematic view of the installation of the height adjusting lever and the backrest adjusting lever;

[0014] FIG. 4 is a schematic structural view of the height adjusting handle;

[0015] FIG. 5 is a structural schematic diagram of the backrest adjusting handle;

[0016] FIG. 6 is a top view of the height adjusting handle;

[0017] FIG. 7 is a top view of the backrest adjusting handle;

[0018] FIG. 8 is a bottom view of the height adjusting handle;

[0019] FIG. 9 is a bottom view of the backrest adjusting handle;

[0020] Reference signs: Tray body 1, Height adjusting lever 2, First inserting section 21, First connecting hole 22, Backrest adjusting lever 3, Second inserting section 31, Second connecting hole 32, Sunken groove 33, Height adjusting handle 4, First waist-shaped hole 41, Backrest adjusting handle 5, Dustproof rubber sleeve 6, Supporting sleeve 7, Clamping groove 8, Covering block 81, Installation mark 9, Pulling plane 10.DESCRIPTION OF EMBODIMENTS

[0021] The technical solution in the embodiment of the present disclosure will be clearly and completely described below with reference to the drawings. Obviously, the described embodiment is a part of the embodiment of the present disclosure, but not the whole embodiment. The following description of at least one exemplary embodiment is illustrative in nature and is in no way intended to limit the present disclosure, its application or uses. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present disclosure.

[0022] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present application. As used herein, the singular form is also intended to include the plural form unless the context clearly indicates otherwise. Furthermore, it should be appreciated that when the terms “comprising” and / or “including” are used in this specification, they specify the presence of features, steps, operations, devices, components and / or combinations thereof.

[0023] Unless otherwise specified, the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be appreciated that for the convenience of description, the dimensions of various parts shown in the drawings are not drawn according to the actual scale relationship. Techniques, methods and equipment known to those skilled in the art may not be discussed in detail, but in appropriate cases, they should be regarded as part of the authorization specification. In all the examples shown and discussed herein, any specific values should be interpreted as illustrative, and not as limiting. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters indicate similar items in the following drawings, therefore once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0024] As shown in FIGS. 1-9, a seat tray convenient for packaging and transportation includes a tray body 1, and a height adjusting lever 2 for adjusting the height of the seat and a backrest adjusting lever 3 for adjusting the backrest angle are disposed on the tray body 1. The height adjusting lever 2 and backrest adjusting lever 3 are disposed along the transverse direction of the tray body 1, and extend along the longitudinal direction of the tray body 1. In this embodiment, as shown in FIG. 1, the height adjusting lever 2 and backrest adjusting lever 3 are disposed along the length direction of the tray body 1, and respectively extend along the width direction of the tray body 1. A height adjusting handle 4 detachably connected with the height adjusting lever 2 is sleeved on the height adjusting lever 2, and a backrest adjusting handle 5 detachably connected with the backrest adjusting lever 3 is sleeved on the backrest adjusting lever 3.

[0025] A pneumatic lever (not shown) for adjusting the height of the seat and an elastic force accumulator for elastically resetting the rotation angle of the backrest are disposed inside the tray body 1. The height adjusting lever 2 is used for controlling the switch of the pneumatic lever to adjust the height of the seat, and the backrest adjusting lever 3 is used for controlling the elastic force accumulator to adjust the backrest angle. The pneumatic lever for adjusting the height of the seat and the elastic force accumulator for elastically resetting the rotation angle of the backrest are all known in the prior art. The adjustment mechanism of the seat height and the adjustment mechanism of the backrest angle are not limited to the technology disclosed in this embodiment, and the existing adjustment mechanism can be adopted and connected to the height adjusting lever 2 and the backrest adjusting lever 3, so that the height adjusting lever 2 and the backrest adjusting lever 3 can adjust the seat height and the backrest angle.

[0026] The height adjusting handle 4 is disposed along the length direction of the height adjusting lever 2, and the length of the height adjusting lever 2 is extended outwards under the action of the height adjusting handle 4, so that the height adjusting lever 2 can be controlled by pulling the height adjusting handle 4.

[0027] A first inserting section 21 is formed at the end of the height adjusting lever 2, and clamping grooves 8 are formed at the ends of the height adjusting handle 4 and the backrest adjusting handle 5. The cross-sectional shape of the clamping groove 8 corresponds to that of the first inserting section 21 and the second inserting section 31. The first inserting section 21 at the end of the height adjusting lever 2 is used to be inserted into the clamping groove 8 on the height adjusting handle 4, and a first connecting hole 22 is formed on the first inserting section 21. A first waist-shaped hole 41 corresponding to the first connecting hole 22 is formed on the height adjusting handle 4, and the first waist-shaped hole 41 is communicated with the clamping groove 8 on the height adjusting handle 4. The cross-section of the first insertion section 21 can be non-circular, so that the rotation freedom of the height adjusting handle 4 connected to the height adjusting lever 2 can be limited under the action of the first insertion section 21 inserted into the height adjusting handle 4, and the stability of the height adjusting handle 4 connected to the height adjusting lever 2 can be ensured.

[0028] A sunken groove 33 is formed in the middle of the first inserting section 21 or the second inserting section 31, and a covering block 81 corresponding to the sunken groove 33 is formed at the end of the backrest adjusting handle 5. Under the action of the sunken groove 33 and the covering block 81, the contact area between the second inserting section 31 and the backrest adjusting handle 5 is increased, thereby increasing the stress strength of the second inserting section 31.

[0029] When the first inserting section 21 is inserted into the clamping slot 8, the first connecting hole 22 corresponds to the first waist-shaped hole 41. At this time, the first connecting hole 22 and the first waist-shaped hole 41 can be connected through bolts, so that the height adjusting handle 4 is fixedly connected to the end of the height adjusting lever 2. The first waist-shaped hole 41 is disposed along the length direction of the height adjusting handle 4, so that the installation of the height adjusting handle 4 can meet the requirement that the height adjusting handle 4 be installed along the length direction of the height adjusting lever 2. Meanwhile, under the action of the first waist-shaped hole 41, it also facilitates connecting the first connecting hole 22 and the first waist-shaped hole 41 by bolts.

[0030] The backrest adjusting handle 5 is disposed along the length direction of the backrest adjusting lever 3, and the length of the backrest adjusting lever 3 is extended outwards under the action of the backrest adjusting handle 5, so that the backrest adjusting lever 3 can be controlled by pulling the backrest adjusting handle 5.

[0031] A second inserting section 31 is formed at the end of the backrest adjusting lever 3, and the second inserting section 31 at the end of the backrest adjusting lever 3 is used to be inserted into the clamping groove 8 on the backrest adjusting handle 5. A second connecting hole 32 is formed on the second inserting section 31, a second waist-shaped hole 51 corresponding to the second connecting hole 32 is formed on the backrest adjusting handle 5, and the second waist-shaped hole 51 is communicated with the clamping groove 8 on the backrest adjusting handle 5.

[0032] The cross section of the second insertion section 31 is non-circular, so that the rotational freedom of the backrest adjusting handle 5 connected to the backrest adjusting lever 3 can be limited under the action of inserting the second insertion section 31 into the backrest adjusting lever 5, and the stability of the backrest adjusting handle 5 connected to the backrest adjusting lever 3 can be ensured.

[0033] When the second inserting section 31 is inserted into the clamping slot 8, the second connecting hole 32 corresponds to the second waist-shaped hole 51. At this time, the second connecting hole 32 and the second waist-shaped hole 51 can be connected through bolts, so that the backrest adjusting handle 5 is fixedly connected to the end of the backrest adjusting lever 3. The second waist-shaped hole 51 is disposed along the length direction of the backrest adjusting handle 5, so that the installation of the backrest adjusting handle 5 can meet the requirements of being disposed along the length direction of the backrest adjusting lever 3. At the same time, under the action of the second waist-shaped hole 51, it also facilitates the connection of the second connecting hole 32 and the second waist-shaped hole 51 by bolts.

[0034] In some embodiments (not shown), the detachable connections between the height adjusting handle 4 and backrest adjusting handle 5 and the height adjusting lever 2 and backrest adjusting lever 3 can be achieved in different connection modes. In addition to the connection methods mentioned before, more convenient and detachable connection methods such as snap connection and pin connection are adopted, so that the height adjusting handle 4 and backrest adjusting handle 5 can be easily detached from the height adjusting lever 2 and backrest adjusting lever 3, and meanwhile it is also convenient for re-installation.

[0035] Taking the connection between the height adjusting lever 2 and the height adjusting handle 4 as an example, a clamping protrusion which can be pressed and rebounded can be formed on the first inserting section 21 of the height adjusting lever 2. When it is not pressed, the clamping protrusion will remain in a raised state so as to cooperate with the clamping structure on the height adjusting handle 4. In the clamping groove 8 of the height adjusting handle 4, a clamping through hole matched with the shape and position of the clamping projection is correspondingly formed.

[0036] When it is necessary to fix the height adjusting handle 4 to the height adjusting lever 2, the user only needs to align the first inserting section 21 of the height adjusting lever and insert it into the clamping groove 8 of the height adjusting handle 4. With the deepening of the inserting section, the clamping protrusion will gradually align with the clamping through hole and be automatically clamped into the hole when it reaches a proper position, thus realizing the connection between the height adjusting handle 4 and the height adjusting lever 2.

[0037] When the height adjusting handle 4 needs to be detached, the user only needs to press the clamping protrusion to make it rebound to be detached from the clamping through hole. Subsequently, the user can pull out the height adjusting handle 4 from the clamping groove 8 to complete the disassembly process.

[0038] As shown in FIG. 3, a dustproof rubber sleeve 6 and a supporting sleeve 7 are sleeved on the height adjusting lever 2 and the backrest adjusting lever 3, and the dustproof rubber sleeve 6 and the supporting sleeve 7 abut against the ends of the height adjusting handle 4 and the backrest adjusting handle 5.

[0039] The dustproof rubber sleeve 6 is sleeved on the height adjusting lever 2, which is used for achieving dustproof effect and abutting against the end of the height adjusting handle 4 to ensure the stability of the height adjusting handle 4.

[0040] The supporting sleeve 7 is sleeved on the backrest adjusting lever 3. The supporting sleeve 7 is made of a hard material, so that the backrest adjusting lever 3 is prevented from being opened by mistake under the protection of the supporting sleeve 7, which may otherwise affect the use effect of the backrest.

[0041] A horizontally spread pulling plane 10 is formed on the height adjusting handle 4 or backrest adjusting handle 5. The pulling plane 10 is used to increase the cross section, which is convenient for users to pull the pulling plane 10 when in use.

[0042] An installation mark 9 is formed on the back of the height adjusting handle 4 and / or the backrest adjusting handle 5.

[0043] In actual use, in order to ensure that users can easily and accurately adjust the height and backrest angle of the seat, therefore, the total length of the height adjusting handle 4 and backrest adjusting handle 5 needs to be designed such that the pulling plane 10 on the height adjusting handle 4 and backrest adjusting handle 5 can exceed the side edge of the seat by a certain distance when connected to the height adjusting lever 2 and backrest adjusting lever 3.

[0044] When the tray body 1 needs to be packaged, the tray body 1, the height adjusting handle 4 and the backrest adjusting handle 5 can be packed separately, thereby reducing the packaging width of the tray body 1, reducing the packaging space of half the width of the tray body 1, and realizing the separate packaging of the height adjusting handle 4 and the backrest adjusting handle 5, saving the packaging space, further increasing the quantity of products in a container, thereby reducing the transportation cost of individual trays.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the present disclosure. Many modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not to be limited to the embodiments shown herein, but is to be defined in the widest scope consistent with the principles and novel features disclosed herein.

[0046] Although many reference signs are used in the drawings: Tray body 1, Height adjusting lever 2, First inserting section 21, First connecting hole 22, Backrest adjusting lever 3, Second inserting section 31, Second connecting hole 32, Sunken groove 33, Height adjusting handle 4, First waist-shaped hole 41, Backrest adjusting handle 5, Dustproof rubber sleeve 6, Supporting sleeve 7, Clamping groove 8, Covering block 81, Installation mark 9, Pulling plane 10 and the like, the possibility of using other terms is not excluded. These terms are only used to describe and explain the essence of the present disclosure more conveniently. It is against the spirit of the present disclosure to interpret them as any additional restrictions.

[0047] In the description of the present disclosure, it should be appreciated that the orientation or positional relationship indicated by orientation words such as “front, back, upper, lower, left, right”, “lateral, vertical, horizontal” and “top, bottom” are usually based on the orientation or positional relationship shown in the attached drawings, just for the convenience of describing the present disclosure and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, therefore they cannot be construed as limiting the scope of protection of the present disclosure. The orientation words “inside and outside” refer to the inside and outside relative to the outline of each component itself.

[0048] For the convenience of description, spatially relative terms such as “above”, “on”, “on the upper surface of” and “upper” can be used here to describe the spatial positional relationship between a device or feature as shown in the drawings and other devices or features. It should be appreciated that spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device depicted in the drawings. For example, if the devices in the drawings are inverted, devices described as “above” or “on” other devices or structures will be positioned as “below” or “under” other devices or structures. Thus, the exemplary term “above” can include both orientation of “above” and “below”. The device can also be positioned in other different ways (rotated by 90 degrees or in other orientations), and the spatial relative description used here is explained accordingly.

[0049] In addition, it should be noted that the words “first” and “second” are used to define parts for the convenience of distinguishing the corresponding parts. Unless otherwise stated, the above words have no special meaning, and thus they cannot be construed as limiting the protection scope of the present disclosure.

[0050] What has been described above is only the preferred embodiment of the present disclosure, and it is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and changes. Any modification, equivalent substitution, improvement and the like made within the spirit and principle of the present disclosure shall fall into the protection scope of the present disclosure.

Claims

1. A seat tray convenient for packaging and transportation, comprising a tray body (1), wherein a height adjusting lever (2) for adjusting a height of a seat and a backrest adjusting lever (3) for adjusting a backrest angle are provided on the tray body (1); wherein the height adjusting lever (2) and the backrest adjusting lever (3) are disposed along a transverse direction of the tray body (1), a height adjusting handle (4) detachably connected with the height adjusting lever (2) is sleeved on the height adjusting lever (2), and a backrest adjusting handle (5) detachably connected with the backrest adjusting lever (3) is sleeved on the backrest adjusting lever (3).

2. The seat tray convenient for packaging and transportation according to claim 1, wherein the height adjusting handle (4) is disposed along a length of the height adjusting lever (2), and a first inserting section (21) inserted into the height adjusting handle (4) is formed at an end of the height adjusting lever (2); and a first connecting hole (22) is formed on the first inserting section (21), and a first waist-shaped hole (41) corresponding to the first connecting hole (22) is formed on the height adjusting handle (4).

3. The seat tray convenient for packaging and transportation according to claim 2, wherein the first waist-shaped hole (41) is disposed along a length direction of the height adjusting handle (4).

4. The seat tray convenient for packaging and transportation according to claim 1, wherein the backrest adjusting handle (5) is disposed along a length of the backrest adjusting lever (3), and a second inserting section (31) inserted into the backrest adjusting handle (5) is formed at an end of the backrest adjusting lever (3); and a second connecting hole (32) is formed on the second inserting section (31), and a second waist-shaped hole (51) corresponding to the second connecting hole (32) is formed on the backrest adjusting handle (5).

5. The seat tray convenient for packaging and transportation according to claim 4, wherein the second waist-shaped hole (51) is disposed along a length direction of the backrest adjusting handle (5).

6. The seat tray convenient for packaging and transportation according to claim 1, wherein clamping grooves (8) are formed at the ends of the height adjusting handle (4) and the backrest adjusting handle (5), and a dimension of the clamping groove (8) corresponds to a cross section of the end of the height adjusting lever (2) or the backrest adjusting lever (3).

7. The seat tray convenient for packaging and transportation according to claim 1, wherein a dustproof rubber sleeve (6) or a supporting sleeve (7) is sleeved on the height adjusting lever (2) and the backrest adjusting lever (3), and the dustproof rubber sleeve (6) and the supporting sleeve (7) abut against the end of the height adjusting handle (4) or the backrest adjusting handle (5).

8. The seat tray convenient for packaging and transportation according to claim 4, wherein a sunken groove (33) is formed in the middle of the second inserting section (31), and a covering block (81) corresponding to the sunken groove (33) is formed at the end of the backrest adjusting handle (5).

9. The seat tray convenient for packaging and transportation according to claim 1, wherein a horizontally spread pulling plane (10) is formed on the height adjusting handle (4) or backrest adjusting handle (5).

10. The seat tray convenient for packaging and transportation according to claim 9, wherein an installation mark (9) is formed on a back of the height adjusting handle (4) or backrest adjusting handle (5).

11. A seat tray convenient for packaging and transportation, comprising a tray body (1), wherein a height adjusting lever (2) and a backrest adjusting lever (3) are disposed on the tray body (1), wherein the height adjusting lever (2) and the backrest adjusting lever (3) are disposed along a length direction of the tray body (1), and the height adjusting lever (2) and the backrest adjusting lever (3) respectively extend along a width direction of the tray body (1); and the height adjusting lever (2) is detachably connected with a height adjusting handle (4), and the backrest adjusting lever (3) is detachably connected with a backrest adjusting handle (5).

12. The seat tray convenient for packaging and transportation according to claim 11, wherein the height adjusting handle (4) is disposed along a length direction of the height adjusting lever (2), and a first inserting section (21) inserted into the height adjusting handle (4) is formed at an end of the height adjusting lever (2); and a first connecting hole (22) is formed on the first inserting section (21), and a first waist-shaped hole (41) corresponding to the first connecting hole (22) is formed on the height adjusting handle (4).

13. The seat tray convenient for packaging and transportation according to claim 12, wherein the first waist-shaped hole (41) is disposed along a length direction of the height adjusting handle (4), and when the first inserting section (21) is inserted into the height adjusting handle (4), the first connecting hole (22) is communicated with the first waist-shaped hole (41).

14. The seat tray convenient for packaging and transportation according to claim 11, wherein the backrest adjusting handle (5) is disposed along a length direction of the backrest adjusting lever (3), and a second inserting section (31) inserted into the backrest adjusting handle (5) is formed at an end of the backrest adjusting lever (3); and a second connecting hole (32) is formed on the second inserting section (31), and a second waist-shaped hole (51) corresponding to the second connecting hole (32) is formed on the backrest adjusting handle (5).

15. The seat tray convenient for packaging and transportation according to claim 14, wherein the second waist-shaped hole (51) is disposed along a length direction of the backrest adjusting handle (5), and when the second inserting section (31) is inserted into the backrest adjusting handle (5), the second connecting hole (32) is communicated with the second waist-shaped hole (51).

16. The seat tray convenient for packaging and transportation according to claim 11, wherein clamping grooves (8) are formed at the ends of the height adjusting handle (4) and the backrest adjusting handle (5); and a dimension of the clamping groove (8) on the height adjusting lever (2) corresponds to a cross section of the end of the height adjusting rod (2), and a dimension of the clamping groove (8) on the backrest adjusting lever (3) corresponds to a cross section of the end of the backrest adjusting lever (3).

17. The seat tray convenient for packaging and transportation according to claim 11, wherein a dustproof rubber sleeve (6) or a supporting sleeve (7) is sleeved on the height adjusting lever (2) and the backrest adjusting lever (3), and the dustproof rubber sleeve (6) and the supporting sleeve (7) abut against the end of the height adjusting handle (4) or the backrest adjusting handle (5).

18. The seat tray convenient for packaging and transportation according to claim 14, wherein a sunken groove (33) is formed in the middle of the second inserting section (31), and a covering block (81) corresponding to the sunken groove (33) is formed at the end of the backrest adjusting handle (5).

19. The seat tray convenient for packaging and transportation according to claim 11, wherein a horizontally spread pulling plane (10) is formed on the height adjusting handle (4) or backrest adjusting handle (5).

20. The seat tray convenient for packaging and transportation according to claim 19, wherein an installation mark (9) is formed on a back of the height adjusting handle (4) and / or backrest adjusting handle (5).

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