Simple headrest angle adjusting device

Abstract

The utility model discloses a simple headrest angle adjusting device. The simple headrest angle adjusting device comprises a cross rod, a plurality of headrest plate mounting parts are arranged on the cross rod, backrest mounting parts are connected to the two sides of the cross rod in an inserted mode, the backrest mounting parts and the cross rod can rotate relatively, and an electric push rod is arranged between the backrest mounting part on any side and the cross rod and used for driving the cross rod to rotate. According to the utility model, the problems of high cost and complicated assembly in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of home furnishing manufacturing, in particular to a simple headrest angle adjustment device. Background Art

[0002] The existing Chinese utility model patent, CN208784124U, entitled "An Electric Headrest Angle Adjustment Mechanism," discloses an electric headrest angle adjustment mechanism comprising a backrest frame, a headrest frame hingedly mounted on the top of the backrest frame, and an electric drive device for driving the headrest frame to swing forward and backward. The headrest frame includes two headrest connecting members hingedly connected to the side frames of the backrest frame via pins, and a transverse connecting rod connecting the two headrest connecting members. The bottom ends of the side frames are fixedly connected by a connecting crossbeam. The numerous parts involved are high in cost and complicated to assemble. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a simple headrest angle adjustment device which has a simple structure, can reduce costs, and is easy to assemble.

[0004] To achieve the above purpose, the technical solution adopted by the simple headrest angle adjustment device of the present invention is:

[0005] A simple headrest angle adjustment device includes a cross bar with several headrest plate mounting parts provided on the cross bar. Backrest mounting parts are inserted on both sides of the cross bar. The backrest mounting parts and the cross bar can rotate relative to each other. An electric push rod is provided between the backrest mounting part and the cross bar on either side to drive the cross bar to rotate.

[0006] Preferably, the electric push rod has only unidirectional thrust.

[0007] Preferably, a tension spring is provided between the backrest mounting member and the cross bar on at least one side.

[0008] Preferably, the tension spring and the electric push rod are mounted on a backrest mounting piece on the same side, and the length of the backrest mounting piece on this side is longer than the length of the backrest mounting piece on the other side.

[0009] Preferably, a sleeve or a bearing is provided between the backrest mounting member and the crossbar.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] 1. After the headrest mounting piece and the cross bar are fixed together, the cross bar and the backrest mounting piece are plugged in to form a hinge structure. The electric push rod is also directly installed on the backrest mounting piece on one side, eliminating multiple parts and the corresponding bolt tightening process, thereby achieving the purpose of reducing costs and simplifying the assembly process.

[0012] 2. Use an electric push rod with only one-way thrust, and then cooperate with a tension spring to drive the headrest board to reset, so as to avoid pinching the hands when the headrest board is reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a simple headrest angle adjustment device of the present utility model.

[0014] Figure 2 yes Figure 1 Enlarged view of point C.

[0015] Among them, 1 cross bar, 11 first ear plate, 12 second ear plate, 2 headrest plate mounting part, 3 backrest mounting part, 31 hinge shaft, 32 hanging pin, 4 shaft sleeve, 5 electric push rod, 6 tension spring. DETAILED DESCRIPTION

[0016] The present invention is further illustrated below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0017] like Figure 1-2 As shown, a simple headrest angle adjustment device includes a cross bar 1, which is a round rod. Two symmetrical headrest plate mounting parts 2 are welded on the outer circumference of the round rod. The spacing between the two headrest plate mounting parts can be adjusted as needed. Backrest mounting parts 3 are plugged into the two sides of the cross bar. The backrest mounting parts and the cross bar can rotate relative to each other. A shaft sleeve 4 is installed between the backrest mounting part and the cross bar. The shaft sleeve is an oil-free shouldered engineering plastic shaft sleeve, which can avoid mutual wear between the cross bar and the backrest mounting part and also play a role in reducing noise. An electric push rod 5 is arranged between the backrest mounting part and the cross bar on the left side to drive the cross bar to rotate. The back mounting piece is welded with an articulated shaft 31 for articulating the electric push rod housing, and two first ear plates 11 for articulating the telescopic rod of the electric push rod are welded on the left side of the cross bar. The electric push rod only has a unidirectional thrust. A tension spring 6 is arranged between the left backrest mounting piece and the cross bar, and the left backrest mounting piece is fixed with a hanging pin 32. A second ear plate 12 is welded on the left side of the cross bar, one end of the tension spring is connected to the hanging pin, and the other end is inserted into the opening on the second ear plate. Since the backrest mounting piece on the right does not need to reserve the installation position of the electric push rod and the tension spring, its length can be shorter than that of the left backrest mounting piece, which can also save materials and reduce costs.

[0018] The specific working process and principle of this utility model are as follows: When the electric push rod is activated, the nut inside the electric push rod provides thrust for the electric push rod's telescopic rod. The telescopic rod of the electric push rod extends, driving the cross bar to rotate. The cross bar drives the headrest mounting member to rotate to the desired angle. When the electric push rod is reset, the electric push rod's nut retracts, the electric push rod's telescopic rod loses its supporting force, and the tension spring pulls the cross bar in the opposite direction, causing the electric push rod's telescopic rod to retract. The tension of the tension spring is relatively small, achieving the effect of preventing pinching. Considering that the driving force of the headrest does not need to be very large, installing the electric push rod on the side of the cross bar can also achieve a good driving effect, thereby simplifying the structure, facilitating assembly, and reducing costs.

[0019] The electric push rod proposed in this utility model is a prior art. The working principle can be referred to the Chinese utility model patent with publication number CN211481074U, entitled "An electric push rod that only pushes but does not pull".

Claims

1. A simple headrest angle adjustment device, characterized by: It includes a cross bar with several headrest mounting parts on it. Backrest mounting parts are inserted on both sides of the cross bar. The backrest mounting parts and the cross bar can rotate relative to each other. An electric push rod is set between the backrest mounting parts and the cross bar on either side to drive the cross bar to rotate.

2. The simple headrest angle adjustment device according to claim 1, characterized in that: The electric push rod only has one-way thrust.

3. The simple headrest angle adjustment device according to claim 2, characterized in that: A tension spring is provided between the backrest mounting piece and the crossbar on at least one side.

4. The simple headrest angle adjustment device according to claim 3, characterized in that: The tension spring and the electric push rod are installed on the backrest mounting piece on the same side, and the length of the backrest mounting piece on the same side is longer than that of the backrest mounting piece on the other side.

5. The simple headrest angle adjustment device according to claim 1, characterized in that: A shaft sleeve or a bearing is provided between the backrest mounting piece and the crossbar.

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