CN217672270U - Lightweight car seat back lock - Google Patents

Abstract

The utility model relates to a light-weighted car seat back lock, activity keep off some systems and still include the coaxial comfortable piece of rotationally installing on the lock body and stop the pawl, comfortable piece respectively under first locking state and second locking state with the spring bolt meshing for the spring bolt provides the restraint, under first locking state, the rotation that keeps off some receives the restraint that stops the pawl, stop the pawl and support the spring bolt on vertical in order to provide longitudinal strength. According to the utility model discloses a lightweight car seat back lock provides the support to the lock tongue through stopping the pawl on vertical, has reached stronger longitudinal strength, and consequently the cover plate thickness can need not very thick, does not need thick apron to provide longitudinal strength promptly, and weight also therefore greatly reduced, the weight and the cost of assembly can reduce by a wide margin, and material utilization is high, and the assembly light in weight of car seat back lock satisfies the lightweight requirement.

Description

Lightweight car seat back lock

Technical Field

The utility model relates to a car seat, more specifically relate to a light-weighted car seat back lock.

Background

The seat back of a car is normally locked at a certain comfortable angle during normal use, but the angle also has a fine adjustment requirement, so that a two-gear lock product is required to meet the requirement and provide two-gear adjustment of the angle of the seat back. CN201910141964.0 provides a two-shift lock product: in the first locking state, the steel wire of the vehicle body is positioned between the front arm and the rear arm of the bolt and limited by the gear point; in a second locking state, the stopping pawl is kept away, and the steel wire of the automobile body can be pushed into a second gear and is limited by the cover plate.

In the normal use process of the automobile seat backrest lock and in the lateral collision, enough strength needs to be provided, the longitudinal strength of the CN201910141964.0 two-gear lock product is provided by the strength of the cover plate, the cover plate usually needs to be made of thicker materials to provide larger longitudinal strength, the material utilization rate is not high, the cost of parts is higher, and the weight of the automobile seat backrest lock is heavier.

SUMMERY OF THE UTILITY MODEL

In order to solve the heavy scheduling problem of weight among the above-mentioned prior art, the utility model provides a lightweight car seat back lock.

According to the utility model discloses a lightweight car seat back lock, it includes lock body and activity catch point system, wherein, this lock body has the locked groove that supplies the automobile body steel wire to move about, and the activity catch point system includes lock tongue and the catch point that coaxial rotationally installs on the lock body, and the lock tongue has left arm and the right arm that forks; in the first locking state, the steel wire of the vehicle body is limited by the right arm and the gear point of the lock tongue; in a second locking state, the steel wire of the vehicle body is limited by the right arm of the lock tongue and the bottom wall of the lock groove; the movable catch point system also comprises a comfort piece and a stop pawl which are coaxially and rotatably arranged on the lock body, and the comfort piece is meshed with the lock bolt in a first locking state and a second locking state respectively to provide restraint for the lock bolt; in the first locked state, rotation of the catch point is constrained by a stop pawl that supports the deadbolt in the longitudinal direction to provide longitudinal strength.

Preferably, the stopping pawl includes an integrally formed mounting section supporting the latch bolt in a longitudinal direction and a stopping section laterally protruding from the mounting section to restrain the catch point in the first locking state.

Preferably, a transition area between the mounting section and the stopping section is provided by connecting a first straight line section, which provides a transition with the stopping section, an arc section, which is an arc concentric with a rotation center of the stopping pawl, a second straight line section, which provides an overlap with the locking tongue in the longitudinal direction, and a third straight line section, which provides a transition with the mounting section.

Preferably, the second linear section overlaps the bolt in the longitudinal direction by at least 3mm.

Preferably, the movable catch point system further comprises a stop pawl spring mounted on the mounting section, and both ends of the stop pawl spring are respectively connected to the lock body and the stop pawl to provide a driving force for rotation of the stop pawl.

Preferably, the movable catch point system comprises a first rivet and a second rivet, wherein the first rivet and the second rivet are respectively and fixedly installed on two sides of a lock groove of the lock body and are arranged in a left-right staggered mode, the comfortable sheet is sleeved on the first rivet to rotate around the first rivet, and the lock tongue and the catch point are respectively sleeved on the second rivet to rotate around the second rivet.

Preferably, the movable catch point system further comprises a comfort leaf spring and a lock tongue spring, wherein two ends of the comfort leaf spring are respectively connected with the lock body and the comfort leaf to provide driving force for the comfort leaf to rotate around the first rivet; two ends of the bolt spring are respectively connected with the lock body and the bolt to provide driving force for the bolt to rotate around the second rivet; the comfort tab always has a counterclockwise rotation force around the first rivet by means of the preload force of the comfort tab spring, and the latch always has a clockwise rotation force around the second rivet by means of the preload force of the latch spring.

Preferably, the movable catch point system comprises a safety plate rotatably sleeved on the first rivet, and the safety plate is engaged with the lock tongue in a first locking state and/or a second locking state of the failure of the comfort plate.

Preferably, the movable catch point system further comprises a safety sheet spring, and two ends of the safety sheet spring are respectively connected with the lock body and the safety sheet to provide driving force for the safety sheet to rotate around the first rivet.

Preferably, the movable catch system further comprises a catch spring, and two ends of the catch spring are respectively connected with the lock body and the catch point to provide driving force for the rotation of the catch point around the second rivet.

Preferably, the lock body comprises a housing and a cover plate, wherein the housing and the cover plate are connected to form a frame structure, and the movable catch system is mounted inside the frame structure.

Preferably, the car seat back lock further comprises an unlocking system for actuating the comfort tab.

Preferably, the unlocking system comprises an unlocking handle and a handle return spring, wherein the unlocking handle is mounted on the lock body by the handle return spring.

Preferably, the unlocking system further comprises an indicator mounted to the unlocking handle, the indicator being tilted up in the unlocked state.

According to the utility model discloses a lightweight car seat back lock provides the support to the lock tongue through stopping the pawl on vertical, has reached stronger longitudinal strength, and consequently the cover plate thickness can need not very thick, does not need thick apron to provide longitudinal strength promptly, and weight also therefore greatly reduced, the weight and the cost of assembly can reduce by a wide margin, and material utilization is high, and the assembly light in weight of car seat back lock satisfies the lightweight requirement. In a word, lightweight and low-cost mainstream research and development direction that is current hasp product, according to the utility model discloses a lightweight car seat back lock can use in the hasp application scenario of various differences, especially to the comparatively sensitive occasion of weight and cost.

Drawings

Fig. 1 is an exploded view of a lightweight car seat back lock according to a preferred embodiment of the present invention;

FIG. 2 illustrates a fully unlocked state of the vehicle seat back lock of FIG. 1;

FIG. 3 illustrates a first locked state of the vehicle seat back lock of FIG. 1;

FIG. 4 illustrates a second locked condition of the vehicle seat back lock of FIG. 1;

FIG. 5 illustrates an operating state of a stop pawl of the car seat back lock of FIG. 1;

FIG. 6 illustrates a partial side view of the car seat back lock of FIG. 1 showing the stopping pawl and the locking tongue distributed on two adjacent layers in an overlapping area;

fig. 7 illustrates an overlapping area formed by the stopping pawls of the car seat back lock of fig. 1.

Detailed Description

The following description of the preferred embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1, the light-weighted car seat back lock according to the present invention comprises a lock body, an active catch point system and an unlocking system, wherein the active catch point system is accommodated in the lock body, and the unlocking system cooperates with the active catch point system to realize the double-shift adjustment of the car seat back.

The lock body comprises a shell 5 and a cover plate 13, wherein the shell 5 and the cover plate 13 are connected through fasteners such as a buckle and a bolt to form a frame structure, and the movable stop point system is installed inside the frame structure. The frame structure is attached and fixed to the vehicle seat by a bolt-like fastener, and has an arc-shaped passage, which may also be called a lock groove, extending in the left-right direction, in which a body wire 20 (see fig. 2 to 4) is received for movement.

The movable stop system comprises a first rivet 8, a second rivet 16, a comfort piece 10, a safety piece 11, a stop pawl 12, a lock tongue 17 and stop points 18, wherein the first rivet 8 and the second rivet 16 are respectively fixedly arranged on two sides of an arc-shaped channel of the shell 5 and are arranged in a left-right staggered manner; the comfort piece 10, the safety piece 11 and the stop pawl 12 are sequentially sleeved on the first rivet 8 to rotate around the first rivet 8; the lock tongue 17 and the stop point 18 are respectively sleeved on the second rivet 16 to realize rotation around the second rivet 16. In this embodiment, the comfort sheet spring 6 has one end connected to the housing 5 and the other end connected to the comfort sheet 10, thereby providing a driving force for the rotation of the comfort sheet 10 around the first rivet 8; one end of the safety sheet spring 7 is connected with the shell 5, and the other end of the safety sheet spring is connected with the safety sheet 11, so that driving force is provided for the safety sheet 11 to rotate around the first rivet 8; the stop pawl spring 9 has one end connected to the housing 5 and the other end connected to the stop pawl 12 to provide a driving force for the rotation of the stop pawl 12 around the first rivet 8; one end of the bolt spring 14 is connected with the shell 5, and the other end is connected with the bolt 17, so that driving force is provided for the bolt 17 to rotate around the second rivet 16; the catch spring 15 has one end connected to the housing 5 and the other end connected to the catch 18, thereby providing a driving force for the rotation of the catch 18 around the second rivet 16.

The unlocking system comprises an unlocking handle 1 and a handle restoring spring 2, wherein the unlocking handle 1 is installed on the lock body through the handle restoring spring 2. The unlocking system further comprises an indicator 3 and an indicator spring 4, wherein the indicator 3 is installed on the unlocking handle 1 through the indicator spring 4, and when the unlocking handle 1 is pressed down by external force to perform unlocking operation, the unlocking handle 1 is tilted upwards, so that the indicator 3 rises along with the unlocking handle, and the unlocking state is indicated. It is clear that when the indicator 3 is not raised, it indicates that it is in the latched state.

In order to better understand the connection relationship between the lock body, the movable catch system and the unlocking system, the assembling process of the car seat back lock will be briefly described. First, the handle return spring 2 is fitted over the unlocking handle 1 to form a small assembly, which is fitted into the housing 5. Then, the indicator 3 is fitted into the housing 5, and both legs of the indicator spring 4 are fitted into the mounting hole of the unlocking handle 1 and the indicator 3, respectively, and fitted over the mounting post of the housing 5. The comfort leaf spring 6 and the safety leaf spring 7 are then each inserted into the housing 5, the spring legs being snapped into the relevant region of the housing 5. Then, the first rivet 8, the comfort piece 10 and the safety piece 11 are sequentially put in, and the leg of the comfort piece spring 6 is unscrewed to be lapped on the spring support feature of the comfort piece 10, and the leg of the safety piece spring 7 is unscrewed to be lapped on the spring support feature of the safety piece 11. Then, the stop pawl 12 is loaded, the stop pawl spring 9 is loaded, and two hanging points of the stop pawl spring 9 are hung on the housing 5 and the stop pawl 12, respectively. The latch spring 14 and the catch spring 15 are then each inserted into the housing 5, the spring legs being snapped into place in the housing 5. Then, the second rivet 16, the latch 17, and the catch point 18 are sequentially installed, the leg of the catch point spring 15 is unscrewed to ride on the spring support feature of the catch point 18, and the leg of the latch spring 14 is unscrewed to ride on the spring support feature of the latch 17. Finally, the cover plate 13 is fastened to rivet the first rivet 8 and the second rivet 16.

Fig. 2 shows the fully unlocked state of the car seat back lock, in which the comfort plate 10, the safety plate 11, the stopping pawl 12, the locking tongue 17 and the blocking point 18 are in the initial positions under the preload of the springs, respectively. The body wire 20 can enter the arc-shaped channel under the action of the external force applied to the backrest, move leftwards in the arc-shaped channel in an arc-shaped track, and act on the left arm 171 of the latch tongue 17 firstly and then simultaneously act on the upper part of the stop point 18, so that the latch tongue 17 and the stop point 18 rotate anticlockwise around the second rivet 16. The top end of the catch point 18 is restricted by the stop pawl 12 when it rotates to contact the front end of the stop pawl 12 and moves to the first locked state of the car seat back lock as shown in fig. 3. At this time, the counterclockwise rotation of the stopper point 18 is restricted, and the body wire 20 is stopped by the right arm 172 of the tongue 17 and the stopper point 18 in the arc-shaped passage, i.e., the movement of the body wire 20 of the backrest in the arc-shaped passage is terminated to achieve the locking in the first gear position. Meanwhile, the comfort piece 10 and the safety piece 11 are pushed by the locking tongue 17 to rotate counterclockwise around the first rivet 8 to a position where the safety piece is engaged with the locking tongue 17 in the first locking state to prevent the locking tongue 17 from rotating clockwise around the second rivet 16 to unlock.

The external force pulls the unlocking handle 1 in the counterclockwise direction, the unlocking handle 1 drives the comfort piece 10 and the safety piece 11 to rotate clockwise by taking the first rivet 8 as a pivot, so that the front ends of the comfort piece 10 and the safety piece 11 are tilted, a channel is opened, then the stopping pawl 12 is continuously driven to rotate clockwise by taking the first rivet 8 as a pivot to overcome the pre-loading force of the stopping pawl spring 9, the stopping pawl 12 rotates clockwise by taking the first rivet 8 as a pivot, and the front end of the stopping pawl 12 tilts upwards. The front end of the stopping pawl 12 moves away from the front of the catch point 18 to free the catch point 18. The body wire 20 continues to enter the arcuate channel under the force applied to the backrest, causing the latch 17 and catch point 18 to continue to rotate counterclockwise about the second rivet 16. Until abutting against the bottom wall of the arc-shaped channel and being restrained by the channel wall, after the unlocking handle 1 is released, the front ends of the comfort strip 10 and the safety strip 11 fall into the arc-shaped channel to provide restraint for the lock tongue 17, namely, the right arm 172 of the lock tongue 17 is limited and locked by the comfort strip 10 and the safety strip 11, and the automobile seat backrest lock moves to the second locking state, as shown in fig. 4. At this time, the body wire 20 is restrained in the arc-shaped channel by the bottom wall of the arc-shaped channel and the right arm 172 of the latch tongue 17, that is, the movement of the body wire 20 of the backrest in the arc-shaped channel is terminated to achieve the locking in the second gear position.

It should be understood that, in both the first locking position and the second locking position, the unlocking handle 1 is rotated counterclockwise to push the comfort strip 10, the safety strip 11 and the stop pawl 12 to rotate clockwise, and to enter the unlocking state. The automobile seat backrest lock is unlocked through the unlocking handle 1 at the first locking position, the automobile body steel wire 20 moves leftwards, the lock tongue 17 and the gear point 18 can be pushed to rotate around the second rivet 16, and the automobile seat backrest lock can enter the second locking position from the first locking position; the body wire 20 moves to the right and the car seat back latch enters a fully unlocked state.

It should be understood that the latch 17 always has a clockwise rotation force around the second rivet 16 by means of the preload force of the latch spring 14, the comfort tab 10 always has a counterclockwise rotation force around the first rivet 8 by means of the preload force of the comfort tab spring 6, and the safety tab 11 always has a counterclockwise rotation force around the first rivet 8 by means of the preload force of the safety tab spring 7. In the first locked state, the comfort tab 10 engages the locking tongue 17 to prevent the locking tongue 17 from rotating clockwise about the second rivet 16 to unlock. In the second locked state, the comfort tab 10 engages the right arm 172 of the locking tongue 17 to prevent the locking tongue 17 from rotating clockwise about the second rivet 16 to unlock. If an abusive force is applied that urges the body wire 20 to the right out of the restraint of the right arm 172 of the latch 17, the force reaches a magnitude that will cause the latch 17 to disengage from the comfort tab 10, which will engage the safety tab 11. If excessive force continues to be applied, only breaking the security flap 11 will cause the backrest to reach the unlocked position.

Specifically, as shown in fig. 5, the stop pawl 12 of the present embodiment includes a mounting section 12a and a stop section 12b that are integrally formed, the stop pawl spring 9 being mounted on the mounting section 12a, and the stop section 12b projecting laterally from the mounting section 12a to stop the catch point 18 in the first locking state. In the initial design, the transition area between the mounting section 12a and the stopping section 12b is a straight line and a circular arc, as shown by the chain line in fig. 5, the stopping pawl 12 does not overlap with the locking tongue 17 in the longitudinal direction, and the locking tongue 17 is supported by the second rivet 16 and the cover plate 13 (see fig. 6) in two places to bear the longitudinal load Fy. Practice has shown that the longitudinal strength of the original design of the car seat back lock is provided by the strength of the locking tongue 17 and the cover plate 13, the cover plate 13 usually needs to be made of a thicker material to provide a larger longitudinal strength, the material utilization rate is not high, the cost of parts is higher, and the weight of the car seat back lock is heavier. The transition area between the mounting section 12a and the stopping section 12b of the stopping pawl 12 of the present embodiment is a first straight line section EF providing a transition with the stopping section 12b, an arc section FG being an arc concentric with the center of rotation of the stopping pawl, a second straight line section GH providing an overlap with the latch 17 in the longitudinal direction by a length of at least 3mm, and a third straight line section JK providing a transition with the mounting section 12 a. As shown in fig. 6, the latch tongue 17 and the stopping pawl 12 are located at two layers adjacent to each other in the longitudinal direction in the overlapping area (the area indicated by the dashed frame in fig. 7), and bear the longitudinal strength load Fy together. In this way, when the vehicle seat back lock is subjected to a longitudinal strength load Fy, a load is applied to the right arm 172 of the latch 17, the latch 17 is supported by the straight line segment GH of the stop pawl 12, and the straight line segment GH and the support of the second rivet 16 form a two-point support, so that sufficient strength can be provided. Under this structure, the whole contribution degree of apron 13 to longitudinal strength descends by a wide margin, and then 1 mm's steel sheet, the thickness of littleer even can be chooseed for use to the material thickness of apron 13, consequently can improve the utilization ratio of material, reduces the manufacturing cost and the weight of hasp assembly greatly. Thus, the stopping pawl 12 of this embodiment, adding only a small piece of material and weight in the transition area, supports the locking tongue 17 in the longitudinal direction, providing longitudinal strength.

What has been described above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and various changes can be made in the above-described embodiment of the present invention. All the simple and equivalent changes and modifications made according to the claims and the content of the specification of the present invention fall within the scope of the claims of the present invention. The present invention is not described in detail in the conventional technical content.

Claims (12)

1. A light automobile seat backrest lock is characterized by comprising a lock body and a movable stop point system, wherein the lock body is provided with a lock groove for a steel wire of an automobile body to move left and right; in the first locking state, the steel wire of the vehicle body is limited by the right arm and the gear point of the lock tongue; in a second locking state, the steel wire of the vehicle body is limited by the right arm of the lock tongue and the bottom wall of the lock groove; the movable catch point system also comprises a comfort piece and a stop pawl which are coaxially and rotatably arranged on the lock body, and the comfort piece is meshed with the lock bolt in a first locking state and a second locking state respectively to provide restraint for the lock bolt; under first locking state, the rotation of keeping off the point receives the restraint of stopping the pawl, stop the pawl and support the spring bolt in order to provide longitudinal strength in vertical, stop the pawl and include integrated into one piece's installation section and stop section, the installation section supports the spring bolt in vertical, stop the section and stretch out from the installation section side direction in order to restrain the fender point under first locking state, the transition region between installation section and the stop section is provided by the first straight line section of connection, the circular arc section, second straight line section and third straight line section, wherein, first straight line section provides and stops the transition between the section, the circular arc section is the circular arc concentric with the rotation center of stopping the pawl, the second straight line section provides and the spring bolt overlap in vertical, the third straight line section provides and the transition between the installation section.

2. The lightweight automotive seat back lock of claim 1, wherein the second linear segment longitudinally overlaps the locking tongue by at least 3mm.

3. The lightweight automotive seat back lock of claim 1, wherein the movable catch point system further comprises a stop pawl spring mounted on the mounting section, the stop pawl spring having ends connected to the lock body and the stop pawl, respectively, to provide a driving force for rotation of the stop pawl.

4. The lightweight automotive seat back lock of claim 1, wherein the movable catch system comprises a first rivet and a second rivet, wherein the first rivet and the second rivet are respectively fixedly mounted on two sides of the lock slot of the lock body and are arranged in a staggered manner from side to side, the comfort piece is sleeved on the first rivet to realize rotation around the first rivet, and the lock tongue and the catch point are respectively sleeved on the second rivet to realize rotation around the second rivet.

5. The lightweight automotive seat back lock of claim 4, wherein the movable catch system further comprises a comfort leaf spring and a latch spring, wherein the comfort leaf spring has two ends respectively connected to the lock body and the comfort leaf to provide a driving force for the comfort leaf to rotate around the first rivet; the two ends of the bolt spring are respectively connected with the lock body and the bolt so as to provide driving force for the bolt to rotate around the second rivet; the comfort tab always has a counterclockwise rotation force around the first rivet by means of the preload force of the comfort tab spring, and the latch always has a clockwise rotation force around the second rivet by means of the preload force of the latch spring.

6. The lightweight automotive seat back lock of claim 4, wherein the movable catch system comprises a safety tab rotatably disposed about the first rivet, the safety tab engaging the locking tongue in the first and/or second locked condition in which the comfort tab is disabled.

7. The lightweight automotive seat back lock of claim 6, wherein the movable catch system further comprises a disc spring having ends connected to the lock body and the disc, respectively, to provide a driving force for rotation of the disc about the first rivet.

8. The lightweight automotive seat back lock of claim 4, wherein the movable catch system further comprises a catch spring having ends connected to the lock body and the catch point, respectively, to provide a driving force for rotation of the catch point about the second rivet.

9. The lightweight automotive seat back lock of claim 1, wherein the lock body comprises a housing and a cover plate, wherein the housing and the cover plate are connected to form a frame structure, and the movable catch system is mounted inside the frame structure.

10. The light weight automobile seat back lock of claim 1, further comprising an unlocking system for actuating the comfort tab.

11. The light weight automobile seat back lock of claim 10, wherein the unlocking system comprises an unlocking handle and a handle return spring, wherein the unlocking handle is mounted to the lock body via the handle return spring.

12. The lightweight car seat back lock of claim 11, wherein the unlocking system further comprises an indicator mounted to the unlocking handle, the indicator being cocked in the unlocked state.

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