An electric adjustment mechanism for the backrest of a car rear seat

Abstract

This utility model provides an electric adjustment mechanism for the rear seat backrest of an automobile, including a mounting bracket, a sector-shaped gear plate, and a drive motor. The mounting bracket is fixed to the vehicle body and rotatably connected to the sector-shaped gear plate. The drive motor is located on the side of the mounting bracket facing the vehicle body, and its output shaft passes through the mounting bracket to drive a gear on the outer side of the mounting bracket. The sector-shaped gear plate is connected to the seat backrest, and has a sector-shaped groove opposite to the gear. Teeth that mesh with the gear are machined on the sector-shaped groove, forming a gear sector. The locking hook on the seat backrest is driven by the gear sector to perform an arc-shaped movement. This mechanism design reduces the volume of the adjustment mechanism, making it easy to arrange in confined spaces; and it provides an arc-shaped adjustment hook trajectory, increasing the backrest adjustment angle.

Description

Technical Field

[0001] This utility model belongs to the field of automotive seat technology and relates to an electric adjustment mechanism for the backrest of a car rear seat. Background Technology

[0002] Existing car seat backrests are rotatably connected to the rear end of the seat cushion via a backrest adjustment mechanism, and the angle of the seat backrest can be adjusted through this mechanism. Most backrest adjustment mechanisms are installed on both sides of the seat and connect the lower end of the seat backrest to the rear end of the seat cushion; the seat backrest can be locked or unlocked by rotating a corresponding lever. This type of backrest adjustment mechanism is bulky and heavy, unsuitable for use in confined spaces, and has limited adjustment angle. Summary of the Invention

[0003] In view of the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide an electric adjustment mechanism for the backrest of a car rear seat. The design of this mechanism reduces the size of the adjustment mechanism, making it easy to arrange in a small space; and it provides a curved adjustment hook track, which increases the adjustment angle of the backrest.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An electric adjustment mechanism for the rear seat backrest of an automobile includes a mounting bracket, a sector-shaped gear plate, and a drive motor. The mounting bracket is fixed to the vehicle body and rotatably connected to the sector-shaped gear plate. A drive motor is located on the side of the mounting bracket facing the vehicle body, and the output shaft of the drive motor passes through the mounting bracket to drive a gear on the outer side of the mounting bracket to rotate. The sector-shaped gear plate is connected to the seat backrest, and a sector-shaped groove is provided on the sector-shaped gear plate at a position opposite to the gear. Teeth that mesh with the gear are machined on the sector-shaped groove, forming a gear sector. A locking hook on the seat backrest is driven to perform an arc-shaped movement by the gear sector.

[0006] As a preferred embodiment of this utility model, the mounting bracket has a U-shaped structure, with two lugs extending outward from the open end of the mounting bracket, and the lugs are fixedly connected to the vehicle body; the open end of the mounting bracket faces the vehicle body, and the drive motor is installed and fixed in the inner groove of the mounting bracket.

[0007] As a preferred embodiment of this invention, the mounting bracket and the sector-shaped toothed plate are connected by riveting, and the sector-shaped toothed plate can rotate relative to the mounting bracket.

[0008] As a preferred embodiment of this utility model, the fan-shaped toothed plate is provided with a locking rod on the side facing the seat back. The locking rod is connected to the backrest locking mechanism on the side of the seat back, and the fan-shaped toothed plate is connected to the seat back through the locking rod and the backrest locking mechanism.

[0009] As a preferred embodiment of this invention, the seat back is connected to the rear end of the seat cushion via a backrest rotation hinge.

[0010] Advantages and beneficial effects of this utility model:

[0011] (1) The adjustment mechanism provided by this utility model is small in size, which reduces the size of the electric adjustment mechanism, making it easy to arrange in a small space and reducing weight and cost.

[0012] (2) The adjustment mechanism provided by this utility model provides a track with an arc-shaped adjustment hook, which can increase the adjustment angle of the backrest.

[0013] (3) The adjustment mechanism provided by this utility model has a locking hook on the seat back that is driven by a gear sector to make arc motion, which reduces the up and down movement of the locking hook in the lock body, thereby reducing the lock body strength requirements caused by the up and down displacement of the locking hook in the lock body. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0015] Figure 1 A schematic diagram of the overall structure of the adjustment mechanism provided by this utility model;

[0016] Figure 2 Front view of the adjustment mechanism provided by this utility model installed on the seat back;

[0017] Figure 3 Main view of the adjustment mechanism provided by this utility model;

[0018] Figure 4 Side view of the adjustment mechanism provided by this utility model.

[0019] Reference numerals: 1. Mounting bracket; 2. Sector toothed plate; 3. Drive motor; 4. Seat back; 5. Gear; 6. Backrest rotating hinge; 101. Lug; 201. Sector groove; 202. Locking rod; 401. Backrest locking mechanism. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] like Figures 1 to 4 As shown, this embodiment provides an electric adjustment mechanism for the rear seat backrest of an automobile, including a mounting bracket 1, a sector-shaped toothed plate 2, and a drive motor 3. The mounting bracket 1 is fixed to the vehicle body and rotatably connected to the sector-shaped toothed plate 2. The drive motor 3 is located on the side of the mounting bracket facing the vehicle body, and the output shaft of the drive motor 3 passes through the mounting bracket to drive a gear 5 on the outer side of the mounting bracket to rotate. The sector-shaped toothed plate 2 is connected to the seat backrest 4, and a sector-shaped groove 201 is provided on the sector-shaped toothed plate 2 at a position opposite to the gear 5. Teeth (unmarked) that mesh with the gear 5 are machined on the sector-shaped groove 201, forming a toothed sector.

[0023] Furthermore, such as Figure 2 , Figure 4 As shown, in this embodiment, the mounting bracket 1 has a U-shaped structure. The open end of the mounting bracket 1 extends outward and is provided with two lugs 101. The lugs 101 are provided with mounting holes (not marked) and are fixed to the vehicle body by bolts. The open end of the mounting bracket 1 faces the vehicle body, and the drive motor 3 is installed and fixed in the inner groove of the mounting bracket 1.

[0024] Furthermore, such as Figure 4 As shown, in this embodiment, the mounting bracket 1 and the sector toothed plate 2 are connected by riveting, and the sector toothed plate 2 can rotate relative to the mounting bracket 1.

[0025] Furthermore, continue as Figure 2 , Figure 4 As shown, in this embodiment, the fan-shaped toothed plate 2 is provided with a locking rod 202 on the side facing the seat back 4. The locking rod 202 is connected to the backrest locking mechanism 401 on the side of the seat back, and the fan-shaped toothed plate 2 is connected to the seat back 4 through the locking rod 202 and the backrest locking mechanism 401. Specifically, the backrest locking mechanism 401 includes a lock body and a lock hook. The lock hook is connected to the locking rod 202. In this embodiment, the backrest locking mechanism on the side of the seat back adopts an existing structure, so it will not be described in detail.

[0026] Furthermore, continue as Figure 2As shown, in this embodiment, the seat back is rotatably connected to the rear end of the seat cushion via a backrest rotation hinge 6. When the seat back 4 needs to be adjusted in angle, the drive motor 3 is activated, driving the gear 5 to rotate. After the gear 5 rotates, it drives the sector tooth plate 2 to rotate along the sector groove, that is, the sector tooth plate 2 rotates relative to the mounting bracket 1, thereby driving the backrest to rotate and realizing the adjustment of the backrest angle.

[0027] The above describes specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. An electrically adjustable mechanism for a backrest of a rear seat of a vehicle, characterized in that The device includes a mounting bracket, a sector-shaped gear plate, and a drive motor. The mounting bracket is fixed to the vehicle body and rotatably connected to the sector-shaped gear plate. The drive motor is located on the side of the mounting bracket facing the vehicle body, and the output shaft of the drive motor passes through the mounting bracket to drive the gear on the outside of the mounting bracket to rotate. The sector-shaped gear plate is connected to the seat backrest. The sector-shaped gear plate has a sector-shaped groove at the position opposite to the gear. The sector-shaped groove is machined with teeth that mesh with the gear to form a gear sector. The locking hook on the seat backrest is driven by the gear sector to perform an arc motion.

2. The power backrest adjustment mechanism according to claim 1, characterized in that The mounting bracket has a U-shaped structure, with two lugs extending outward from the open end of the mounting bracket. The lugs are fixedly connected to the vehicle body. The open end of the mounting bracket faces the vehicle body, and the drive motor is installed and fixed in the inner groove of the mounting bracket.

3. The power backrest adjustment mechanism of claim 1, wherein, The mounting bracket and the sector toothed plate are connected by riveting, and the sector toothed plate can rotate relative to the mounting bracket.

4. The power backrest adjustment mechanism of claim 1, wherein, The fan-shaped toothed plate is provided with a locking rod on the side facing the seat back. The locking rod is connected to the backrest locking mechanism on the side of the seat back, and the fan-shaped toothed plate is connected to the seat back through the locking rod and the backrest locking mechanism.

5. The power backrest adjustment mechanism of claim 1, wherein, The seat back is connected to the rear end of the seat cushion via a backrest swivel hinge.

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