Limitable seat tray

Abstract

A seat tray capable of being limited comprises a tray body and a backrest mounting frame connected to the tail of the tray body in a hinged mode. The backrest mounting frame comprises a mounting frame body used for mounting a backrest and a rotating plate hinged to the tray body, a mounting cavity penetrating through the mounting frame body is formed in the middle of the mounting frame body, a mounting opening communicated with the mounting cavity is formed in one side of the mounting frame body, and the rotating plate is arranged in the opening direction of the mounting opening; the rotating plates are positioned on two opposite sides of the mounting opening; a limiting separation blade positioned in the mounting cavity is formed at the bottom of the mounting frame main body; compared with the prior art, through the arrangement of the mounting cavity of the external expansion structure, the backrest mounting frame is not limited by the size of the tray body, and the backrest can be supported under the action of the connecting screw rod and the limiting separation blade, so that the backrest is pre-mounted in the mounting cavity; and meanwhile, a larger rotating space can be reserved between the connecting screw rod and the tray main body, so that the backrest can conveniently realize a larger overturning range.

Description

Technical Field

[0001] The utility model relates to the technical field of seat trays, in particular to a seat tray with a limit function. Background Art

[0002] Existing seats usually have a reclining backrest installed on the back for users to relax and rest. When using such a seat with a reclining backrest, the backrest needs to be installed on the seat tray.

[0003] In the prior art, the backrest and the seat tray are usually installed by manually positioning the backrest. However, since the backrest usually has a large volume and a large weight, there is a tendency for the relative position between the backrest and the seat tray to shift during the installation process, resulting in misalignment between the screws and the screw holes, making the installation of the backrest and the seat tray time-consuming and laborious.

[0004] Chinese Patent Application No. 202022290880.4 discloses a seat chassis, which includes a main base, a rear base, a clamping block, a clamping block notch, a clamping block stopper, an adjusting screw, and an adjusting knob. One end of the main base is hinged with the rear base. The rear base is inserted and fixed with the clamping block. The upper end of the clamping block is provided with a clamping block notch. One side of the clamping block is fixed with a clamping block stopper. The adjusting screw penetrates through the rear base on one side of the clamping block, and one end of the adjusting screw is screwed with the adjusting knob.

[0005] The above-mentioned disclosed seat chassis realizes the clamping of the backrest on the seat chassis by pushing the clamping block stopper to contract the clamping block notch and clamping the bottom of the backrest through the contraction of the clamping block notch. However, since the clamping block needs to realize the contraction of the notch, the clamping block must be made of a brittle material, which makes the structure fragile and easily damaged, and easily causes the overall cracking of the clamping block, affecting the overall installation effect. Summary of the Utility Model

[0006] The utility model aims to overcome the above-mentioned defects in the prior art and provides a seat tray with a limit function, which has a simple structure and convenient limit.

[0007] To achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions: A seat tray with a limit function includes a tray main body and a backrest mounting frame hinged to the tail of the tray main body; the backrest mounting frame includes a mounting frame main body for mounting the backrest and a rotating plate hinged to the tray main body. An installation cavity is formed in the middle of the mounting frame main body and runs through the mounting frame main body. An installation opening is formed on one side of the mounting frame main body and is connected to the installation cavity. The rotating plate is arranged along the opening direction of the installation opening, and the rotating plate is located on the opposite sides of the installation opening; a limit tab is formed at the bottom of the mounting frame main body.

[0008] As a preferred embodiment of the present utility model, the main body of the mounting frame includes a connecting plate and side plates formed on opposite sides of the connecting plate. An installation cavity is defined between the connecting plate and the oppositely arranged side plates, and a limiting flap is formed at the bottom of the connecting plate.

[0009] As a preferred embodiment of the present utility model, a connecting screw for pre-positioning the backrest is installed between the oppositely arranged side plates, and the connecting screw is arranged parallel to the limiting flap.

[0010] As a preferred embodiment of the present utility model, the limiting flap is located at the bottom opening of the main body of the mounting frame, and the limiting flap is formed in the middle of the bottom of the connecting plate.

[0011] As a preferred embodiment of the present utility model, a plurality of connecting holes for connecting the backrest are formed on the connecting plate.

[0012] As a preferred embodiment of the present utility model, the oppositely arranged rotating plates are arranged in a fitting manner on the inner wall of the tray body, and a pin shaft penetrating through the oppositely arranged rotating plates is provided on the tray body.

[0013] As a preferred embodiment of the present utility model, the distance between the oppositely arranged rotating plates is smaller than the distance between the oppositely arranged side plates.

[0014] As a preferred embodiment of the present utility model, the side plates are arranged parallel to the rotating plates, and a bending plate is formed between the side plates and the rotating plates.

[0015] As a preferred embodiment of the present utility model, a reinforcing plate for strengthening the structural strength of the backrest mounting frame is formed in the backrest mounting frame, and the reinforcing plate is connected to the bending plate.

[0016] As a preferred embodiment of the present utility model, the limiting flap, the main body of the mounting frame, and the two oppositely arranged rotating plates are of an integral structure.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: Through the setting of the installation cavity with an outward expansion structure, the backrest mounting frame is not restricted by the size of the tray body, and under the action of the connecting screw and the limiting flap, the bottom of the backrest can be supported, so as to realize the pre-installation of the backrest in the installation cavity. At the same time, a larger rotating space can be reserved between the connecting screw and the tray body, which is convenient for the backrest to achieve a larger flipping range. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a side view of the present utility model;

[0020] Figure 3It is a schematic structural diagram of the backrest mounting bracket;

[0021] Figure 4 It is a side view of the backrest mounting bracket;

[0022] Figure 5 It is a bottom view of the backrest mounting bracket;

[0023] Figure 6 It is a top view of the backrest mounting bracket;

[0024] Reference numerals: tray main body 1, backrest mounting bracket 2, pin shaft 3, limit retaining piece 4, mounting bracket main body 5, connecting plate 51, side plate 52, connecting hole 53, connecting screw 54, rotating plate 6, mounting cavity 7, mounting opening 8, bent plate 9, reinforcing plate 91. Detailed implementation mode

[0025] The following will describe in detail the embodiments of the present invention with reference to the accompanying drawings.

[0026] As Figures 1-6 shown, a limitable seat tray includes a tray main body 1 and a backrest mounting bracket 2 hingedly connected to the tail of the tray main body 1; the backrest mounting bracket 2 includes a mounting bracket main body 5 for mounting the backrest and a rotating plate 6 hinged to the tray main body 1, a mounting cavity 7 penetrating through the mounting bracket main body 5 is formed in the middle of the mounting bracket main body 5, a mounting opening 8 communicating with the mounting cavity 7 is formed on one side of the mounting bracket main body 5, the rotating plate 6 is arranged along the opening direction of the mounting opening 8, and the rotating plate 6 is located on opposite sides of the mounting opening 8; a limit retaining piece 4 is formed at the bottom of the mounting bracket main body 5.

[0027] The tray main body 1 is fixedly installed on the seat by bolts, and the backrest mounting bracket 2 rotates synchronously with the rotation of the backrest. A torsion spring and a pin shaft connected to the backrest mounting bracket 2 are installed on the tray main body 1, and under the action of the torsion spring, the rotation angle of the backrest can be limited and reset.

[0028] The size of the mounting cavity 7 is designed according to the size of the bottom of the backrest to be connected, so that the bottom of the backrest can be installed in the mounting bracket main body 5 by plugging, and the bottom of the backrest can be supported by the limit retaining piece 4 to realize the pre-positioning and pre-installation of the backrest in the mounting bracket main body 5.

[0029] The mounting bracket main body 5 includes a connecting plate 51 and side plates 52 formed on opposite sides of the connecting plate 51. The mounting cavity 7 is surrounded between the connecting plate 51 and the opposite side plates 52, and the limit retaining piece 4 is formed at the bottom of the connecting plate 51.

[0030] The connecting plate 51 and the side plates 52 are of an integral structure, and the mounting bracket main body 5 is not limited by the structural size of the tray main body 1 under the action of the rotating plate 6.

[0031] The limiting stop piece 4 is located at the bottom opening of the installation cavity 7, so that the backrest can be inserted into the installation frame main body 5 through the opening at the top of the installation cavity 7, and can be supported at the bottom of the backrest under the action of the limiting stop piece 4.

[0032] A connecting screw rod 54 is installed between the oppositely arranged side plates 52. The connecting screw rod 54 is arranged parallel to the limiting stop piece 4. Both the connecting screw rod 54 and the limiting stop piece 4 are used for the pre-installation of the backrest. During the pre-installation process, the limiting stop piece 4 is used to limit the vertical direction of the backrest, and the connecting screw rod 54 limits the horizontal direction of the backrest.

[0033] Under the action of the connecting screw rod 54 and the limiting stop piece 4, the pre-installation of the bottom of the backrest in the installation cavity 7 is realized. Combining with the limiting stop piece 4 to support the height of the backrest, a space convenient for the backrest to flip is formed between the connecting screw rod 54 and the tray main body 1.

[0034] The limiting stop piece 4 is located at the bottom opening of the installation frame main body 5, and the limiting stop piece 4 is formed in the middle of the bottom of the connecting plate 51 to ensure that the bottom of the backrest is supported by the limiting stop piece 4.

[0035] A plurality of connecting holes 53 for connecting the backrest are formed on the connecting plate 51. Bolts can be installed at the connecting holes 53 to realize the fixed connection between the connecting plate 51 and the backrest, so as to realize that the rotation of the backrest synchronously drives the rotation of the backrest installation frame 2.

[0036] The oppositely arranged rotating plates 6 are arranged in a fitting manner on the inner wall of the tray main body 1, and a pin shaft 3 penetrating through the oppositely arranged rotating plates 6 is provided on the tray main body 1. During the rotation of the rotating plate 6, the rotating plate 6 always abuts against the inner wall of the tray main body 1, so as to ensure the rotation stability of the rotating plate 6. The rotating plate 6 rotates on the tray main body 1 with the center line of the pin shaft 3 as the center of the circle.

[0037] The distance between the oppositely arranged rotating plates 6 is smaller than the distance between the oppositely arranged side plates 52. The side plates 52 are arranged parallel to the rotating plates 6, and a bent plate 9 is formed between the side plates 52 and the rotating plates 6. Under the action of the bent plate 9, the distance between the oppositely arranged side plates 52 is not limited by the rotating plates 6, so as to expand the size of the installation cavity 7, increase the space for the backrest to move back and forth, and make the adjustable angle of the backrest larger.

[0038] A reinforcing plate 91 for strengthening the structural strength of the backrest installation frame 2 is formed in the backrest installation frame 2. The reinforcing plate 91 is connected to the bent plate 9. The reinforcing plate 91 is located at the connection between the backrest installation frame 2 and the rotating plate 6. By strengthening the structural strength of the backrest installation frame 2, the deformation at the connection between the backrest installation frame 2 and the rotating plate 6 is prevented.

[0039] The limit retaining piece 4, the mounting frame body 5, and the two relatively arranged rotating plates 6 are of an integral structure, enabling the overall backrest mounting frame 2 to have better structural strength.

[0040] During the actual use process, through the setting of the mounting cavity 7 with an outward expansion structure, the space for the backrest to move back and forth is increased, enabling the backrest to have a larger adjustable angle. And through the design of the limit retaining piece 4, the bottom of the backrest is supported, thereby realizing the pre-positioning of the backrest on the mounting frame body 5, facilitating the subsequent fixation and connection of the backrest to the mounting frame body 5 with screws.

[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0042] Although terms such as tray body 1, backrest mounting frame 2, pin shaft 3, limit retaining piece 4, mounting frame body 5, connecting plate 51, side plate 52, connecting hole 53, connecting screw 54, rotating plate 6, mounting cavity 7, mounting opening 8, bending plate 9, reinforcing plate 91, etc. are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A positionable seat tray, comprising a tray body (1) and a backrest mounting frame (2) hingedly connected to the rear of the tray body (1); characterized in that: The backrest mounting frame (2) comprises a mounting frame body (5) for mounting the backrest and a rotating plate (6) hinged to the tray body (1); a mounting cavity (7) penetrating the mounting frame body (5) is formed in the middle of the mounting frame body (5); a mounting opening (8) communicating with the mounting cavity (7) is formed on one side of the mounting frame body (5); the rotating plate (6) is arranged along the opening direction of the mounting opening (8), and the rotating plate (6) is located on opposite sides of the mounting opening (8); and a limit stopper (4) is formed at the bottom of the mounting frame body (5).

2. A position-limitable seat tray according to claim 1, characterized in that: The mounting frame body (5) comprises a connecting plate (51) and side plates (52) formed on opposite sides of the connecting plate (51); a mounting cavity (7) is formed between the connecting plate (51) and the oppositely disposed side plates (52); and a limit stopper (4) is formed at the bottom of the connecting plate (51).

3. A position-limitable seat tray according to claim 2, characterized in that: A connecting screw (54) for pre-positioning the backrest is installed between the side plates (52) arranged opposite to each other, and the connecting screw (54) is arranged in parallel with the limiting baffle (4).

4. A position-limitable seat tray according to claim 2, characterized in that: The position-limiting baffle (4) is located at the bottom opening of the mounting frame body (5), and the position-limiting baffle (4) is formed in the middle of the bottom of the connecting plate (51).

5. The position-limitable seat tray according to claim 2, characterized in that: The connecting plate (51) is formed with a plurality of connecting holes (53) for connecting a backrest.

6. The position-limitable seat tray according to claim 1, characterized in that: The relatively arranged rotating plates (6) are arranged in a close-fitting manner on the inner wall of the tray body (1), and the tray body (1) is provided with a pin shaft (3) which penetrates and connects with the relatively arranged rotating plates (6).

7. The position-limitable seat tray according to claim 2, characterized in that: The spacing between the rotating plates (6) arranged opposite to each other is smaller than the spacing between the side plates (52) arranged opposite to each other.

8. A position-limitable seat tray according to claim 7, characterized in that: The side plate (52) is arranged parallel to the rotating plate (6), and a bent plate (9) is formed between the side plate (52) and the rotating plate (6).

9. A position-limitable seat tray according to claim 8, characterized in that: A reinforcing plate (91) for reinforcing the structural strength of the backrest mounting frame (2) is formed in the backrest mounting frame (2), and the reinforcing plate (91) is connected to the bent plate (9).

10. The position-limitable seat tray according to claim 1, characterized in that: The position-limiting baffle (4), the mounting frame body (5) and the two rotating plates (6) arranged opposite to each other are an integrated structure.

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