A manual unlocking device for a car seat slide rail

Abstract

The utility model belongs to the technical field of automobile seat, it solves the problem of poor stability of automobile seat slide rail unlocking in prior art, provide a kind of automobile seat slide rail manual unlocking device, including the adjusting pull rod of rotation setting between two slide rails, adjusting pull rod is "U" type and its both ends are respectively with the press section of bending setting towards adjacent slide rail, and the reverse "U" type limiting plate of vertical setting is fixedly connected on mounting bracket, press section is located between limiting plate and mounting bracket, and press section is flat and with the unlocking rod of locking mechanism upper and lower opposite setting, adjusting pull rod is fixedly connected with the rotating shaft of vertical setting, the both ends of rotating shaft are rotatably set on two mounting brackets respectively, and the distance from adjusting pull rod front end to rotating shaft is greater than the distance from adjusting pull rod rear end to rotating shaft, and the end of rotating shaft and corresponding mounting bracket are respectively provided with reset spring between.The utility model has the advantages of realizing the stable unlocking of automobile seat slide rail manual unlocking device.

Description

Technical Field

[0001] This utility model belongs to the field of automotive seat technology and relates to a manual unlocking device for automotive seat slide rails. Background Technology

[0002] Existing car seat rails generally include a fixed guide rail mounted on the car floor, a movable guide rail slidably mounted on the fixed guide rail, and a locking device for locking or unlocking the fixed and movable guide rails. For example, Chinese patent literature discloses a bushing and a manual unlocking mechanism for a car seat rail having the same (application number: 202322499294.4), which includes a pair of rails and an adjusting rod rotatably disposed between the two rails. The rails are provided with mounting brackets having mounting holes. The two ends of the adjusting rod are respectively inserted into the mounting holes of the corresponding mounting brackets. Mounting plates are fixedly connected to the two ends of the adjusting rod. Each mounting plate has a cylindrical pressure rod horizontally fixedly connected to it. The pressure rod is locked to the rail. The locking tongues are positioned vertically opposite each other. Each end of the adjusting rod is fitted with a return spring. One end of the return spring is fixed to the mounting plate, and the other end is fixed to the mounting bracket. When the car seat slide rail needs to be unlocked, the user drives the front side of the adjusting rod to swing upwards, causing the pressure rod located behind the adjusting rod to swing downwards. The pressure rod presses down on the locking tongue of the slide rail locking device, thus unlocking the fixed and movable guide rails of the slide rail. When the car seat is adjusted to its forward / backward position, the user releases the adjusting rod. Under the restoring force of the return spring, the front side of the adjusting rod swings downwards to reset, and the pressure rod located behind the adjusting rod swings upwards to reset. The slide rail locking device unlocks and relocks the fixed and movable guide rails of the slide rail.

[0003] The aforementioned manual unlocking mechanism for car seat slide rails has the following shortcomings during use: Because the pressure rod is a long, round rod, and the top of the locking tongue of the slide rail locking device is arc-shaped, when the pressure rod swings downward to squeeze the locking tongue, the contact area between the two is small and slippage is easy to occur. This makes it impossible for the pressure rod to accurately and stably press down on the locking tongue of the slide rail locking device. In addition, the adjusting rod itself is formed by welding multiple parts, and the adjusting rod, mounting plate and pressure rod are all connected by welding, resulting in poor unlocking stability. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by providing a manual unlocking device for automotive seat slide rails. The technical problem this invention aims to solve is how to achieve stable unlocking of the manual unlocking device for automotive seat slide rails.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A manual unlocking device for a car seat slide rail includes a pair of slide rails. Each slide rail includes an outer guide rail, an inner guide rail slidably mounted on the outer guide rail, and a locking mechanism for locking or unlocking the inner and outer guide rails. A mounting bracket is mounted on the inner guide rail. The locking mechanism includes an unlocking rod that is sway-mounted on the slide rail and used to unlock the inner and outer guide rails. The unlocking rod extends upwards from the slide rail and the mounting bracket. The manual unlocking device also includes an adjusting rod rotatably disposed between the two slide rails. The adjusting rod is U-shaped and has two ends respectively facing upwards. A pressing section is bent towards the adjacent slide rail. A vertically arranged inverted "U"-shaped limiting plate is fixed to the mounting bracket. The pressing section is located between the limiting plate and the mounting bracket, and the pressing section is flat and is arranged vertically opposite to the unlocking rod of the locking mechanism. A horizontally arranged rotating shaft is fixed to the adjusting rod. The two ends of the rotating shaft are rotatably mounted on the two mounting brackets respectively. The distance from the front end of the adjusting rod to the rotating shaft is greater than the distance from the rear end of the adjusting rod to the rotating shaft. A return spring is provided between the end of the rotating shaft and the corresponding mounting bracket.

[0007] This manual unlocking device for car seat slide rails features flat pressing sections integrally formed at both ends of a U-shaped adjusting rod. This simple structure provides the pressing sections with high strength and toughness, while significantly increasing the contact area between the pressing sections and the unlocking rod. Furthermore, an inverted U-shaped limiting plate guides the up-and-down movement of the pressing sections, ensuring the adjusting rod stably presses against the unlocking rod of the locking mechanism during unlocking. This results in stable unlocking of the manual unlocking device for car seat slide rails. Additionally, the adjusting rod is rotatably mounted on two mounting brackets via a rotating shaft located near the pressing sections, cleverly utilizing the lever principle to make manually lifting the adjusting rod easier for the user.

[0008] In the aforementioned manual unlocking device for car seat slide rails, a rubber sleeve is fitted onto the pressing section. The pressing section has recessed positioning grooves on both side walls, and the rubber sleeve is fitted into two positioning grooves on each side. The bottom surface of the rubber sleeve is flat. The rubber sleeve increases the friction between the pressing section and the unlocking lever, preventing slippage. Simultaneously, the flat bottom surface of the rubber sleeve provides better support for the pressing section when in contact with the unlocking lever, thus ensuring stable unlocking of the car seat slide rail manual unlocking device. Furthermore, the rubber sleeve prevents rattling noises when the pressing section contacts the unlocking lever, resulting in a better user experience. The two positioning grooves on each side of the rubber sleeve prevent displacement during use.

[0009] In the aforementioned manual unlocking device for a car seat slide rail, the inner wall of the rubber sleeve has a trapezoidal protrusion, and the middle of the pressing section has an upwardly protruding portion. A limiting groove matching the shape of the protrusion is formed below the protrusion, and the protrusion is embedded in the limiting groove. The inner wall of the rubber sleeve also has multiple vertically arranged positioning blocks, distributed on both sides of the protrusion and abutting against the pressing section. This design facilitates the fitting of the rubber sleeve onto the pressing section. Furthermore, the engagement of the protrusion with the groove wall provides front-to-back positioning, while the multiple positioning blocks on both sides of the protrusion abut against the pressing section provide vertical positioning, preventing the rubber sleeve from falling off.

[0010] In the aforementioned manual unlocking device for car seat slide rails, a rubber block is connected to the limiting plate above the rubber sleeve. The bottom surface of the rubber block is flat, and the middle part of the top of the rubber sleeve is flat. Both sides of the top of the rubber sleeve are inclined surfaces that slope downwards from the inside out. There is a gap between the rubber block and the rubber sleeve. The collision between the rubber block and the rubber sleeve reduces noise, and the rubber block also limits the swing of the adjusting lever's pressing section, thus achieving stable unlocking of the manual unlocking device for car seat slide rails.

[0011] In the aforementioned manual unlocking device for a car seat slide rail, the rubber block has a columnar connecting portion, which passes through a limiting plate and is threadedly connected to the limiting plate. The threaded connection serves a self-limiting function and facilitates adjustment of the rubber block's vertical position, thereby controlling the swing amplitude of the adjusting lever's pressing section.

[0012] In the aforementioned manual unlocking device for automotive seat slide rails, the outer guide rail has locking holes, and the locking mechanism further includes an unlocking seat mounted on the inner guide rail. The front end of the unlocking seat is hinged to the inner guide rail, and a first return spring is provided between the unlocking seat and the inner guide rail. The rear end of the unlocking seat is integrally connected to the unlocking rod. A positioning post is vertically movable on the unlocking seat, and a second return spring is sleeved on the positioning post. The upper end of the second return spring is fixed to the positioning post, and the lower end of the second return spring is fixed to the unlocking seat. The lower end of the positioning post extends out of the unlocking seat and is fixedly connected to a locking tooth plate. The locking tooth plate can engage or disengage from the locking holes of the outer guide rail to lock or unlock the inner and outer guide rails. This makes locking or unlocking the inner and outer guide rails more convenient and provides good locking reliability.

[0013] Compared with existing technologies, the advantages of this manual unlocking device for car seat slide rails are as follows: This device features flat pressing sections integrally formed at both ends of a U-shaped adjusting rod, resulting in a simple structure with high strength and toughness. It also significantly increases the contact area between the pressing section and the unlocking rod. Furthermore, an inverted U-shaped limiting plate guides the up-and-down movement of the pressing section, ensuring the adjusting rod stably presses against the unlocking rod of the locking mechanism during unlocking. This achieves stable unlocking of the manual unlocking device for car seat slide rails. Additionally, the adjusting rod is rotatably mounted on two mounting brackets via a rotating shaft connected to the pressing section, cleverly utilizing the lever principle to make manually lifting the adjusting rod easier for the user. Attached Figure Description

[0014] Figure 1 This is a 3D structural diagram of the manual unlocking device for the car seat slide rail.

[0015] Figure 2 This is a partial cross-sectional view of the manual unlocking device for the car seat rail.

[0016] Figure 3 This is a three-dimensional structural diagram of the manual unlocking device for the car seat slide rail, including the adjusting lever, return spring, and rubber sleeve.

[0017] Figure 4 This is a partial three-dimensional structural diagram of the locking teeth plate of the manual unlocking device for the car seat slide rail, which is embedded in the locking holes of the outer guide rail.

[0018] In the diagram, 1 is the slide rail; 1a is the outer guide rail; 1a1 is the locking hole; 1b is the inner guide rail; 2 is the locking mechanism; 3 is the mounting bracket; 4 is the adjusting rod; 4a is the pressing section; 4a1 is the protrusion; 5 is the limiting plate; 6 is the rotating shaft; 7 is the return spring; 8 is the rubber sleeve; 8a is the protrusion; 8b is the positioning block; 9 is the positioning groove; 10 is the limiting groove; 11 is the rubber block; 11a is the connecting part; 12 is the unlocking seat; 12a is the unlocking rod; 13 is the first return spring; 14 is the positioning post; 15 is the second return spring; and 16 is the locking tooth plate. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] A manual unlocking device for a car seat rail, as described in the following article. Figure 1-4The car seat includes a pair of slide rails 1, each slide rail 1 including an outer guide rail 1a, an inner guide rail 1b slidably mounted on the outer guide rail 1a, and a locking mechanism 2 for locking or unlocking the inner guide rail 1b and the outer guide rail 1a. A mounting bracket 3 is mounted on the inner guide rail 1b. The locking mechanism 2 includes an unlocking rod 12a that is sway-mounted on the slide rail 1 and used to unlock the inner guide rail 1b and the outer guide rail 1a. The unlocking rod 12a extends upwards from the slide rail 1 and the mounting bracket 3. This manual unlocking device includes an adjusting rod 4 rotatably mounted between the two slide rails 1. The adjusting rod 4 is U-shaped and its two ends are respectively bent towards the adjacent slide rail 1. The pressing section 4a is folded and is fixed to the mounting bracket 3 with a vertically arranged inverted "U"-shaped limiting plate 5. The pressing section 4a is located between the limiting plate 5 and the mounting bracket 3, and is flat and vertically opposite to the unlocking rod 12a of the locking mechanism 2. The adjusting rod 4 is fixed to a horizontally arranged rotating shaft 6. The two ends of the rotating shaft 6 are rotatably mounted on the two mounting brackets 3, and the distance from the front end of the adjusting rod 4 to the rotating shaft 6 is greater than the distance from the rear end of the adjusting rod 4 to the rotating shaft 6. A return spring 7 is provided between the end of the rotating shaft 6 and the corresponding mounting bracket 3. The return spring 7 is sleeved on the rotating shaft 6, with one end of the return spring 7 connected to the rotating shaft 6 and the other end connected to the mounting bracket 3.

[0021] Reference Figure 1 , Figure 2 and Figure 3 Furthermore, a rubber sleeve 8 is fitted onto the pressing section 4a, and the two side walls of the pressing section 4a have recessed positioning grooves 9. The two sides of the rubber sleeve 8 are respectively embedded in the two positioning grooves 9, and the bottom surface of the rubber sleeve 8 is flat.

[0022] Reference Figure 1 , Figure 2 and Figure 3 Specifically, the inner wall of the rubber sleeve 8 has a protrusion 8a with a trapezoidal cross-section, and the middle of the pressing section 4a has an upwardly protruding part 4a1. A limiting groove 10 matching the shape of the protrusion 8a is formed below the protrusion 4a1, and the protrusion 8a is embedded in the limiting groove 10. The inner wall of the rubber sleeve 8 also has a plurality of vertically arranged positioning blocks 8b, which are distributed on both sides of the protrusion 8a and abut against the pressing section 4a respectively.

[0023] Reference Figure 1 , Figure 2 and Figure 3Furthermore, a rubber block 11 is connected to the limiting plate 5 above the rubber sleeve 8. The bottom surface of the rubber block 11 is a plane, the middle part of the top of the rubber sleeve 8 is a plane, and both sides of the top of the rubber sleeve 8 are inclined surfaces that are inclined from the inside out and from top to bottom. There is a gap between the rubber block 11 and the rubber sleeve 8.

[0024] In this embodiment, the rubber block 11 preferably has a columnar connecting part 11a, which passes through the limiting plate 5 and is threadedly connected to the limiting plate 5.

[0025] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 More specifically, the outer guide rail 1a is provided with a locking hole 1a1, and the locking mechanism 2 also includes an unlocking seat 12 provided on the inner guide rail 1b. The front end of the unlocking seat 12 is hinged to the inner guide rail 1b and a first return spring 13 is provided between the unlocking seat 12 and the inner guide rail 1b. The rear end of the unlocking seat 12 is integrally connected to the unlocking rod 12a. The unlocking seat 12 is provided with a positioning post 14 that can move vertically up and down. A second return spring 15 is sleeved on the positioning post 14. The upper end of the second return spring 15 is fixed to the positioning post 14, and the lower end of the second return spring 15 is fixed to the unlocking seat 12. The lower end of the positioning post 14 extends out of the unlocking seat 12 and is fixed to a locking tooth plate 16. The locking tooth plate 16 can be inserted into or disengaged from the locking hole 1a1 of the outer guide rail 1a to lock or unlock the inner guide rail 1b and the outer guide rail 1a.

[0026] The following explains the working principle of this manual unlocking device for car seat rails:

[0027] There are two car seat slide rails 1. Each slide rail 1 includes an outer guide rail 1a, an inner guide rail 1b slidably mounted on the outer guide rail 1a, and a locking mechanism 2 for locking or unlocking the inner guide rail 1b and the outer guide rail 1a. The outer guide rail 1a is provided with a locking hole 1a1. When the car seat is not moved, the locking tooth plate 16 of the locking mechanism 2 provided on the inner guide rail 1b is inserted into the locking hole 1a1 of the outer guide rail 1a to lock the inner guide rail 1b and the outer guide rail 1a.

[0028] When the car seat needs to be moved, the user manually lifts the adjustment lever 4. The front end of the adjustment lever 4 swings upward around the rotating shaft 6. Correspondingly, the front end of the adjustment lever 4 swings downward around the rotating shaft 6, so that the flat pressing sections 4a at both ends of the adjustment lever 4 press down on the unlocking lever 12a of the locking mechanism 2, which is arranged vertically opposite to it. Then, the rear end of the unlocking seat 12 with the unlocking lever 12a swings downward around the hinge point between its front end and the inner guide rail 1b. Then, during the downward swing, the unlocking seat 12 drives the locking tooth plate 16 to move downward synchronously. At the same time, the locking tooth plate 16, along with the positioning post 14 connected to it, overcomes the elastic force of the second return spring 15 and moves downward synchronously. Under the limiting and guiding action of the positioning post 14, the locking tooth plate 16 moves vertically downward until the locking tooth plate 16 disengages from the locking hole 1a1 of the outer guide rail 1a to unlock the inner guide rail 1b and the outer guide rail 1a. Then the user can move the car seat to the predetermined position.

[0029] After adjusting the car seat position, the user releases the adjustment lever 4. The adjustment lever 4 swings back to its original position under the action of the two return springs 7. The unlocking seat 12 swings back to its original position under the action of the first return spring 13. The positioning pin 14 moves vertically upward to its original position under the action of the second return spring 15. At the same time, the positioning pin 14 moves vertically upward to its original position along with the locking tooth plate 16 connected to it, so that the locking tooth plate 16 re-embeds into the locking hole 1a1 of the outer guide rail 1a to lock the inner guide rail 1b and the outer guide rail 1a.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A manual unlocking device for a car seat slide rail, the car seat including a pair of slide rails (1), the slide rail (1) including an outer guide rail (1a), an inner guide rail (1b) slidably mounted on the outer guide rail (1a), and a locking mechanism (2) for locking or unlocking the inner guide rail (1b) and the outer guide rail (1a), the inner guide rail (1b) being mounted with a mounting bracket (3), the locking mechanism (2) including an unlocking rod (12a) swayably mounted on the slide rail (1) and used to unlock the inner guide rail (1b) and the outer guide rail (1a), the unlocking rod (12a) extending upward from the slide rail (1) and the mounting bracket (3), the manual unlocking device including an adjusting rod (4) rotatably mounted between the two slide rails (1), characterized in that, The adjusting rod (4) is U-shaped and has pressing sections (4a) bent toward the adjacent slide rail (1) at both ends. A vertically arranged inverted U-shaped limiting plate (5) is fixed to the mounting bracket (3). The pressing section (4a) is located between the limiting plate (5) and the mounting bracket (3). The pressing section (4a) is flat and is arranged vertically opposite to the unlocking rod (12a) of the locking mechanism (2). A horizontally arranged rotating shaft (6) is fixed to the adjusting rod (4). The two ends of the rotating shaft (6) are rotatably arranged on the two mounting brackets (3). The distance from the front end of the adjusting rod (4) to the rotating shaft (6) is greater than the distance from the rear end of the adjusting rod (4) to the rotating shaft (6). A return spring (7) is provided between the end of the rotating shaft (6) and the corresponding mounting bracket (3).

2. The manual unlocking device for a car seat slide rail according to claim 1, characterized in that, A rubber sleeve (8) is fitted on the pressing section (4a). The pressing section (4a) has recessed positioning grooves (9) on both sides. The two sides of the rubber sleeve (8) are respectively embedded in the two positioning grooves (9). The bottom surface of the rubber sleeve (8) is flat.

3. The manual unlocking device for a car seat slide rail according to claim 2, characterized in that, The inner wall of the rubber sleeve (8) has a trapezoidal protrusion (8a) on its inner wall. The middle part of the pressing section (4a) has an upwardly protruding part (4a1). A limiting groove (10) matching the shape of the protrusion (8a) is formed below the protrusion (4a1). The protrusion (8a) is embedded in the limiting groove (10). The inner wall of the rubber sleeve (8) also has a plurality of vertically arranged positioning blocks (8b). The positioning blocks (8b) are distributed on both sides of the protrusion (8a) and are respectively abutted against the pressing section (4a).

4. A manual unlocking device for a car seat slide rail according to claim 2 or 3, characterized in that, The limiting plate (5) is connected to a rubber block (11) located above the rubber sleeve (8). The bottom surface of the rubber block (11) is a plane, the middle part of the top of the rubber sleeve (8) is a plane, and both sides of the top of the rubber sleeve (8) are inclined surfaces that are inclined from the inside out and from top to bottom. There is a gap between the rubber block (11) and the rubber sleeve (8).

5. A manual unlocking device for a car seat slide rail according to claim 4, characterized in that, The rubber block (11) has a columnar connecting part (11a), which passes through the limiting plate (5) and is threadedly connected to the limiting plate (5).

6. A manual unlocking device for a car seat slide rail according to claim 1, 2, or 3, characterized in that, The outer guide rail (1a) is provided with locking holes (1a1). The locking mechanism (2) further includes an unlocking seat (12) disposed on the inner guide rail (1b). The front end of the unlocking seat (12) is hinged to the inner guide rail (1b) and a first return spring (13) is disposed between the unlocking seat (12) and the inner guide rail (1b). The rear end of the unlocking seat (12) is integrally connected to the unlocking rod (12a). The unlocking seat (12) is provided with a positioning post (14) that can move vertically up and down. A second return spring (15) is sleeved on the positioning post (14). The upper end of the second return spring (15) is fixed to the positioning post (14), and the lower end of the second return spring (15) is fixed to the unlocking seat (12). The lower end of the positioning post (14) extends out of the unlocking seat (12) and is fixed to a locking tooth plate (16). The locking tooth plate (16) can be inserted into or disengaged from the locking hole (1a1) of the outer guide rail (1a) to lock or unlock the inner guide rail (1b) and the outer guide rail (1a).

Images