Mechanism for quick folding of electric backrest

Abstract

The utility model discloses a mechanism of quick folding of electric backrest belongs to automobile seat adjusting mechanism field, including the linkage mechanism in the inside of base and casing, the linkage mechanism includes carousel and with the lock mechanism of carousel adaptation, and the lock mechanism includes the stop piece and the stopper, the stopper is suitable for the spacing groove at carousel, and the stopper is hinged in the base through spring pin, and the front of stopper still is fixed with the stop piece, whole structure is more compact, reduces the occupied area to space, is favorable to the demand of current intelligent seat, and can play the function of quick folding simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of automotive seat adjustment mechanisms, specifically, it relates to a mechanism for electric backrest quick folding. Background Technology

[0002] As the demands for comfort and functionality in car seats continue to increase, electric backrest adjustment devices are widely adopted. Existing electric backrest devices are typically driven by a motor, using mechanisms such as worm gears, gear reduction mechanisms, lead screw mechanisms, or eccentric cams to achieve backrest angle adjustment and position locking. To ensure the reliability of the backrest's positioning during use, it is often used in conjunction with paddle / pawl, brakes, or mechanical limit structures as locking components. However, the adjustment speed of electric backrest adjustment devices depends on the motor's rotation speed, making the adjustment speed relatively limited. To achieve the folding function, some structures employ spring assistance or specialized quick-release mechanisms to reduce folding time and operating torque.

[0003] In the process of industrial production and assembly, there are also common practical engineering problems such as difficulty in controlling the fit tolerance between mounting holes, hinge pins and follower parts, limited space for spring parts, and achieving a compact and easy-to-maintain linkage arrangement inside the housing and cover. These problems limit the further optimization of existing electric backrest quick-folding mechanisms in terms of miniaturization, reliability and cost control. Utility Model Content

[0004] To address the above deficiencies, this utility model provides a mechanism for the rapid folding of an electric backrest, including a linkage mechanism located inside the base and the housing, wherein the linkage mechanism includes a turntable and a locking mechanism adapted to the turntable. The inner ring of the turntable is fixed with a drive disk located at the same center, and the drive disk is rotatably connected to a limiting ring at the base. The locking mechanism includes a paddle and a stop block. The stop block is adapted to the limiting groove at the turntable. The stop block is hinged to the base by a spring pin. A stop piece is also fixed on the front of the stop block. The stop piece is penetrated by the spring pin where the stop block is located. The paddle is driven by a fixed shaft installed at the bottom of the base. A paddle is also penetrated on the fixed shaft. The paddle is adapted to the stop block. The paddle is located on the front of the paddle and is limited by it.

[0005] Furthermore, the drive disc is used to connect to the electric backrest body.

[0006] Furthermore, the housing has positioning holes, which are respectively penetrated by two limiting shafts and spring pins.

[0007] Furthermore, an elliptical groove is provided in the middle of the lever block, and an elliptical pad is integrally formed at the through-hole of the fixed axis, with the elliptical groove sleeved on the outside of the elliptical pad.

[0008] Further, the shifting block is in a shape of a Chinese character "da", a positioning post is fixed on the front face of the shifting block, and the shifting plate is provided with an arc-shaped groove adapted to the positioning post.

[0009] The present utility model has the following beneficial effects compared with the prior art: The overall structure of the rapid folding mechanism for the electric backrest is more compact, reduces the occupied space, meets the current demand for intelligent seats, and can achieve the effect of rapid folding at the same time. Description of Drawings

[0010] Figure 1 is a perspective view of the present utility model.

[0011] Figure 2 is a schematic diagram of the internal structure of the present utility model Figure 1 .

[0012] Figure 3 is a schematic diagram of the internal structure of the present utility model Figure 2 .

[0013] In the figures: 1. Base; 2. Housing; 3. Limiting shaft; 11. Driving disc; 12. Rotating disc; 13. Limiting ring; 21. Locking mechanism; 211. Shifting plate; 212. Positioning post; 213. Stop plate; 214. Shifting block; 215. Stop block; 216. Spring pin; 217. Limiting post; 218. Fixed shaft. Detailed Description of the Embodiments

[0014] In order to facilitate understanding of the present utility model, the device of the present utility model will be described more comprehensively below with reference to the relevant drawings. Embodiments of the device are given in the drawings. However, the device can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0015] In the description of the present utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounted", "connected", and "disposed" should be understood in a broad sense. For example, they can be fixedly connected and disposed, detachably connected and disposed, or integrally connected and disposed. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific conditions.

[0016] Embodiment

[0017] as shown in Figure 1-3 , this embodiment provides a rapid folding mechanism for an electric backrest, comprising a linkage mechanism located inside a base 1 and a housing 2, the housing 2 is provided with a positioning hole for a limiting shaft 3 and a spring pin 216 to pass through and be fixed, and the linkage mechanism comprises a rotating disc 12 and a locking mechanism 21 adapted to the rotating disc 12; A co-centered driving disk 11 is fixed on the inner ring of the rotary disk 12 (the driving disk 11 is connected with the electric backrest body and drives the electric backrest body to adjust the angle). The driving disk 11 is rotatably connected to the limit ring 13 at the base 1, so that the rotation operation can be realized. Meanwhile, a protruding layer is further provided on the housing cover 2 for achieving the limiting function after contacting the front surface of the rotary disk 12; The locking mechanism 21 comprises a shifting plate 211 and a stop block 215. The protruding end of the stop block 215 is adapted to a limit slot at the rotary disk 12, so that the blocking and limiting functions can be realized. The stop block 215 is hinged to the base 1 via a spring pin 216. A stop plate 213 is further provided on the front surface of the stop block 215, and the spring pin 215 where the stop block 215 is located penetrates the stop plate 213. Meanwhile, the stop plate 213 is connected with a limit post 217 fixed to the stop block 215 through an opening hole, so that the stop plate 213 and the stop block 215 move synchronously. The upper end of the stop plate 213 is synchronously driven by the shifting plate 211, and the shifting plate 211 is driven by a fixed shaft 218 installed at the bottom of the base 1 (that is, the fixed shaft 218 penetrates the shifting plate 211 and fixes the shifting plate 211). A shifting block 214 is further penetrated on the fixed shaft 218, the shifting block 214 is adapted to the stop block 215, and the shifting plate 211 is located on the front surface of the shifting block 214 and limited by the shifting block 214; that is, the stop plate 213 and the shifting plate 211 are used in cooperation, and the shifting block 214 and the stop block 215 are used in cooperation; In addition, the shifting block 214 is in a shape of a large Chinese character 'da' (the top of the shifting block can contact the stop block 215, and the bottom can contact the limit shaft 3 to prevent an excessively large rotation angle). A positioning post 212 is fixed on the front surface of the shifting block 214, the shifting plate 211 is provided with an arc-shaped slot adapted to the positioning post 212, and the swinging range of the positioning post 212 is limited through the arc-shaped slot. An elliptical slot is formed in the middle of the shifting block 214, an elliptical pad is integrally formed on the fixed shaft 218, and the elliptical slot is sleeved outside the elliptical pad, so that the fixed shaft 218 synchronously drives the shifting block 214 to rotate at this position.

[0018] The electric backrest quick-folding mechanism described in this embodiment, when the backrest angle needs to be adjusted (i.e., lying down or sitting, i.e., folding), controls the fixed shaft 218 to rotate clockwise via an external motor (the external motor refers to a forward and reverse motor installed inside the electric backrest body, whose drive end is fixed to the fixed shaft 218, and the rotation direction is controlled by a button on the side of the electric backrest body; of course, a manual structure using a wrench can also be used, which will not be elaborated here). At this time, the fixed shaft 218 drives the lever 214 clockwise. When the needle rotates, the paddle 214 and the stop plate 213 release their contact (limiting) with the stop block 215 and the paddle 211. At this time, the spring pin 216 returns to its original position (at the same time, the paddle 211 will also contact the bottom end of the stop plate 213 and drive it to rotate), causing the stop plate 213 and the paddle 211 to rotate counterclockwise. At this time, the stop block 215 releases its contact (limiting) with the turntable 12, and the drive disc 11 can be rotated (i.e., the electric backrest body angle is adjusted); conversely, the fixed shaft 218 rotates counterclockwise to achieve contact (limiting) with the turntable 12.

[0019] It should be noted that the structure described in this utility model can be implemented in many different forms and is not limited to the embodiments described. Any equivalent transformations made by those skilled in the art based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, such as the loading and unloading of other items, are included within the protection scope of this utility model.

Claims

1. A mechanism for a rapidly folding electric backrest, comprising a linkage mechanism located inside a base (1) and a housing (2), characterized in that: Said linkage mechanism comprises a rotary disk (12) and a locking mechanism (21) adapted to the rotary disk (12); A driving disk (11) concentric with the rotary disk (12) is fixed to an inner ring of the rotary disk (12), and the driving disk (12) is rotatably connected to a limit ring (13) at the base (1); The locking mechanism (21) comprises a shifting piece (211) and a stop block (215), the stop block (215) is adapted to a limit slot at the rotary disk (12), the stop block (215) is hinged to the base (1) via a spring pin (216), a stop plate (213) is further fixed on a front face of the stop block (215), the stop plate (213) is penetrated by the spring pin (216) where the stop block (215) is located, the shifting piece (211) is driven by a fixed shaft (218) installed at a bottom of the base (1), a shifting block (214) is further penetrated on the fixed shaft (218), the shifting block (214) is adapted to the stop block (215), and the shifting piece (211) is located on a front face of the shifting block (214) and limited thereby.

2. The electric backrest quick-folding mechanism as described in claim 1, characterized in that: The driving disk (11) is configured to be connected to an electric backrest body.

3. The mechanism for rapid folding of an electric backrest as described in claim 1, characterized in that: The housing cover (2) is provided with positioning holes, which are penetrated by two limit shafts (3) and the spring pin (216) respectively.

4. The electric backrest quick-folding mechanism as described in claim 1, characterized in that: An elliptical slot is opened in a middle portion of the shifting block (214), an elliptical pad is integrally formed at a penetration position of the fixed shaft (218), and the elliptical slot is sleeved outside the elliptical pad.

5. The electric backrest quick-folding mechanism as described in claim 1, characterized in that: The shifting block (214) is in a large-character shape, a positioning post (212) is fixed on a front face of the shifting block (214), and the shifting piece (211) is provided with an arc-shaped slot adapted to the positioning post (212).

Images