Zero-gravity seat backrest collision energy absorption locking mechanism

Abstract

The utility model relates to a zero-gravity seat backrest collision energy absorption locking mechanism which comprises a backrest framework, a backrest connecting plate installed on the backrest framework and an angle adjuster installed on the backrest connecting plate, a fixed disc of the angle adjuster is installed on the backrest connecting plate, and a movable disc of the angle adjuster is connected with a cushion framework through a backrest energy absorption locking mechanism. The backrest energy absorption locking mechanism comprises an unlocking support connected with the recliner movable disc, the unlocking support is meshed with the rotating support, the cam locking piece drives the rotating support to be separated from the unlocking support, the exploder drives the cam locking piece to rotate and unlock, the pull wire is connected with the exploder and the cam locking piece, and the energy absorption friction disc is used for unlocking after a vehicle collides. The blocking point limiting mechanism is used for preventing the unlocking bracket from reversely rotating due to inertia force; the backrest energy-absorbing locking mechanism has the advantages that when the seat is collided at a zero-gravity posture position, the backrest can quickly return, so that the restraint protection on passengers is improved, and the injury caused by collision is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile seats, in particular to a zero-gravity seat back collision energy absorption locking mechanism. Background Art

[0002] Today's zero-gravity seats are innovative comfort seats. When using zero-gravity seats, passengers can adjust the seat back and seat pan to achieve a wide-angle reclining position, which brings a more comfortable sitting position. However, due to the large backrest angle of zero-gravity seats, the passengers are in a flat position, and the adjustment range of the seat belt is limited. In an emergency, the restraint force of the seat belt on the body is not enough to fully protect the passengers, which poses a safety hazard. There is an urgent need for a backrest collision energy absorption locking mechanism that can enable the seat back to return quickly when a vehicle collision occurs. Utility Model Content

[0003] In view of the above problems, the purpose of the present invention is to provide a zero-gravity seat back collision energy absorption locking mechanism for the backrest to quickly return to its original position and absorb energy, so as to overcome the above-mentioned deficiencies of the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A zero-gravity seat back collision energy absorption locking mechanism comprises: a backrest frame, a backrest connecting plate installed on the backrest frame, a recliner installed on the backrest connecting plate for adjusting the backrest angle, the fixed plate of the recliner is installed on the backrest connecting plate, the movable plate of the recliner is connected to the cushion frame through the backrest energy absorption locking mechanism, the backrest energy absorption locking mechanism comprises: an unlocking bracket connected to the movable plate of the recliner, a rotating bracket meshed with the unlocking bracket through teeth, a cam locking plate driving the rotating bracket to separate from the unlocking bracket, a detonator driving the cam locking plate to rotate and unlock, a pull line connecting the detonator and the cam locking plate, an energy absorption friction plate for unlocking after a vehicle collision, and a blocking point limiting mechanism for preventing the unlocking bracket from rotating in the opposite direction due to inertia force;

[0006] The detonator pulls the lock tongue on the cam locking plate through the pull wire to overcome the pulling force of the spring and rotates. After the lock tongue contacts the groove of the rotating bracket, it drives the rotating bracket to rotate, so that the teeth on the rotating bracket are separated from the teeth on the unlocking bracket and the unlocking bracket is unlocked. The unlocking bracket is connected to the synchronous cross bar through an energy-absorbing friction disk. One side of the energy-absorbing friction disk is fixedly connected to the synchronous cross bar of the backrest frame, and the other side is fixedly connected to the unlocking bracket. The energy-absorbing friction disk is unlocked after the vehicle collides and allows the unlocking bracket to rotate freely, so that the angle adjuster connected to the unlocking bracket drives the backrest connecting plate and the backrest frame to quickly fall back to the initial position.

[0007] The energy-absorbing friction disc comprises: friction disc housings on both sides, a trigger damping plate rotatably connected inside the friction disc housing, and a core shaft connecting the friction disc housing and the trigger damping plate, wherein the arc-shaped wave surfaces on both sides of the trigger damping plate correspond to the shapes of the inner walls of the friction disc housings on both sides, wherein the trigger damping plate is disposable, and a new energy-absorbing friction disc or trigger damping plate is required after each destruction;

[0008] Among them, the baffle point limiting mechanism includes: a rotating baffle, a fixed baffle, and an anti-rebound cam. The rotating baffle and the anti-rebound cam are installed on the core shaft and are located on both sides of the unlocking bracket. The fixed baffle is installed on the unlocking bracket and is located on one side of the anti-rebound cam. The core shaft synchronously drives the rotating baffle and the anti-rebound cam to rotate. The rotating baffle stops rotating after contacting the fixed baffle. The anti-rebound cam overcomes the spring tension and contacts the fixed baffle during the rotation process, so that the energy-absorbing friction disk stops moving in the opposite direction due to the inertial force.

[0009] As a preferred embodiment of the present invention, the bottoms of the rotating baffle and the fixed baffle are both provided with inwardly curved beveled edges, and the rotating baffle and the fixed baffle are in contact with each other through their respective beveled edges.

[0010] As a preferred embodiment of the present invention, two of the angle adjusters are symmetrically mounted on a backrest connecting plate on a backrest frame, and correspondingly, one of the backrest energy absorption locking mechanisms is mounted on each of the angle adjusters.

[0011] As a preferred embodiment of the present invention, the spring is a coil spring sleeved on the rotating shaft of the cam locking plate, or a tension spring that pulls the cam locking plate.

[0012] The advantages and positive effects of the utility model are:

[0013] 1. The utility model uses the backrest energy absorption locking mechanism to enable the backrest to quickly return to its original position when the seat collides in the zero-gravity posture position, thereby improving the restraint protection for the occupants and reducing the damage caused by the collision.

[0014] 2. The energy-absorbing locking mechanism of the backrest of the utility model is equipped with a limit mechanism for reverse locking. After the seat returns to the designed position, the energy-absorbing locking mechanism of the backrest can be reversely locked, greatly reducing the damage to the occupants caused by the inertia after the seat has a large-angle collision. The optimized sitting posture is achieved to improve the restraint protection of the occupants.

[0015] 3. The utility model uses the energy-absorbing friction disk to make the backrest return to a suitable angle along a predetermined route, and can effectively offset the buffering effect by triggering the damping plate.

[0016] 4. In the present invention, since the backrest angle adjustment is not large, the inertial restriction reaction of the backrest energy absorption locking mechanism can be made faster through the small angle adjustment of the stop point limit mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the seat in the utility model.

[0018] Figure 2 It is a zero gravity posture diagram of the backrest in the utility model.

[0019] Figure 3 It is a partial schematic diagram of the rotation of the backrest in the utility model.

[0020] Figure 4 It is a partial schematic diagram of the detonation position in the utility model.

[0021] Figure 5 It is an exploded view of the energy absorption locking mechanism of the backrest in the utility model.

[0022] Figure 6 It is a schematic diagram of the locking mechanism after reaching the fixed baffle in the utility model.

[0023] Figure 7 It is a schematic diagram of the locking mechanism before unlocking in the utility model.

[0024] Figure 8 It is a schematic diagram of the locking mechanism after unlocking in the utility model.

[0025] Fig. 9 It is an exploded view of the installation of the recliner and the backrest energy absorption locking mechanism in the utility model.

[0026] Fig.10 It is a front schematic diagram of the blocking point limiting mechanism in the utility model.

[0027] Fig.11 It is a schematic diagram of the back side of the blocking point limiting mechanism in the utility model.

[0028] Fig.12 It is a schematic diagram of the energy absorbing friction disc in the utility model.

[0029] Fig.13 It is an exploded view of the energy absorbing friction disc in the utility model.

[0030] Figure numerals: backrest frame 1, backrest connecting plate 2, angle adjuster 3, unlocking bracket 4, rotating bracket 5, cam locking plate 6, detonator 7, pull wire 8, synchronous cross bar 9, energy absorbing friction disk 10, friction disk housing 11, trigger damping plate 12, core shaft 13, rotating baffle 14, fixed baffle 15, anti-rebound cam 16, backrest energy absorption locking mechanism 17. DETAILED DESCRIPTION

[0031] See also Figure 1-13The present embodiment provides a zero-gravity seat back collision energy absorption locking mechanism, comprising: a backrest frame 1, a backrest connecting plate 2 installed on the backrest frame 1, a recliner 3 installed on the backrest connecting plate 2 for adjusting the backrest angle, a fixed plate of the recliner 3 installed on the backrest connecting plate 2, a movable plate of the recliner 3 connected to the cushion frame through a backrest energy absorption locking mechanism 17, and the backrest energy absorption locking mechanism 17 comprising: an unlocking bracket 4 connected to the movable plate of the recliner 3, a rotating bracket 5 meshed with the unlocking bracket 4 through teeth, a cam locking plate 6 driving the rotating bracket 5 to separate from the unlocking bracket 4, and a detonator driving the cam locking plate 6 to rotate and unlock. The detonator 7 is a device for unlocking the vehicle after a collision, a pull wire 8 connecting the detonator 7 and the cam locking plate 6, an energy absorbing friction disk 10 for unlocking the vehicle after a collision, and a stop point limiting mechanism for preventing the unlocking bracket 4 from rotating in the opposite direction due to the inertia force; the detonator 7 pulls the lock tongue on the cam locking plate 6 through the pull wire 8 to overcome the tension of the coil spring and rotate, and the lock tongue contacts the groove of the rotating bracket 5 and drives the rotating bracket 5 to rotate, so that the teeth on the rotating bracket 5 are separated from the teeth on the unlocking bracket 4 and the unlocking bracket 4 is unlocked, and the unlocking bracket 4 is connected to the synchronous cross bar 9 through the energy absorbing friction disk 10, one side of the energy absorbing friction disk 10 is fixedly connected to the synchronous cross bar 9 of the backrest frame 1, and the other side is fixedly connected to the synchronous cross bar 9 of the backrest frame 1. One side is fixedly connected to the unlocking bracket 4. The energy-absorbing friction disc 10 is unlocked after a vehicle collision and allows the unlocking bracket 4 to rotate freely, so that the adjuster 3 connected to the unlocking bracket 4 drives the backrest connecting plate 2 and the backrest frame 1 to quickly fall back to the initial position; the energy-absorbing friction disc 10 includes: friction disc shells 11 on both sides, a trigger damping plate 12 rotatably connected to the inside of the friction disc shell 11, and a core shaft 13 connecting the friction disc shell 11 and the trigger damping plate 12. The arc-shaped wave surfaces on both sides of the trigger damping plate 12 correspond to the shapes of the inner walls of the friction disc shells 11 on both sides, wherein the trigger damping plate 12 is disposable and requires a new one after each damage. The friction disc 10 or the trigger damping plate 12 can be activated; the stop point limiting mechanism includes: a rotating baffle 14, a fixed baffle 15, and an anti-rebound cam 16. The rotating baffle 14 and the anti-rebound cam 16 are installed on the core shaft 13 and are located on both sides of the unlocking bracket 4. The fixed baffle 15 is installed on the unlocking bracket 4 and is located on one side of the anti-rebound cam 16. The core shaft 13 synchronously drives the rotating baffle 14 and the anti-rebound cam 16 to rotate. The rotating baffle 14 stops rotating after contacting the fixed baffle 15. The anti-rebound cam 16 overcomes the spring tension and contacts the fixed baffle 15 during the rotation process, so that the energy absorbing friction disc 10 stops being reversed by the inertial force. The bottoms of the rotating baffle 14 and the fixed baffle 15 are both provided with inwardly curved bevels, and the rotating baffle 14 and the fixed baffle 15 are in contact through their respective bevels.

[0032] Working principle: when the backrest is in a zero-gravity posture (laid down), after a collision occurs, the detonator 7 drives the pull wire 8, which pulls the cam locking plate 6 to drive the lock tongue to unlock, separates the unlocking bracket 4 from the rotating bracket 5, and causes the core shaft 13 of the energy-absorbing friction disk 10 to rotate, triggering the damping plate 12 to rub against the friction disk housing 11, and during the energy absorption process, the backrest returns to the designed posture to protect the occupant once, and the core shaft 13 synchronously drives the rotating baffle 14 and the anti-rebound cam 16 to rotate; after the backrest returns to the designed position, the rotating baffle 14 stops rotating after contacting the fixed baffle 15, and the backrest returns to the designed position, and the anti-rebound cam 16 overcomes the spring tension and falls to contact the fixed baffle 15, causing the energy-absorbing friction disk 10 to stop working in the reverse direction due to the inertial force, thereby providing secondary protection for the occupant.

[0033] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A zero-gravity seat back collision energy absorption locking mechanism, comprising: A backrest frame, a backrest connecting plate installed on the backrest frame, and a recliner installed on the backrest connecting plate for adjusting the backrest angle, characterized in that the fixed plate of the recliner is installed on the backrest connecting plate, the movable plate of the recliner is connected to the cushion frame through a backrest energy absorption locking mechanism, and the backrest energy absorption locking mechanism comprises: an unlocking bracket connected to the movable plate of the recliner, a rotating bracket meshed with the unlocking bracket through teeth, a cam locking plate driving the rotating bracket to separate from the unlocking bracket, a detonator driving the cam locking plate to rotate and unlock, a pull line connecting the detonator and the cam locking plate, an energy absorbing friction plate for unlocking after a vehicle collision, and a blocking point limiting mechanism for preventing the unlocking bracket from rotating in the opposite direction due to inertia force; The detonator pulls the lock tongue on the cam locking plate through the pull wire to overcome the pulling force of the spring and rotates. After the lock tongue contacts the groove of the rotating bracket, it drives the rotating bracket to rotate, so that the teeth on the rotating bracket are separated from the teeth on the unlocking bracket and the unlocking bracket is unlocked. The unlocking bracket is connected to the synchronous cross bar through an energy-absorbing friction disk. One side of the energy-absorbing friction disk is fixedly connected to the synchronous cross bar of the backrest frame, and the other side is fixedly connected to the unlocking bracket. The energy-absorbing friction disk is unlocked after the vehicle collides and allows the unlocking bracket to rotate freely, so that the angle adjuster connected to the unlocking bracket drives the backrest connecting plate and the backrest frame to quickly fall back to the initial position. The energy-absorbing friction disc comprises: friction disc housings on both sides, a trigger damping plate rotatably connected inside the friction disc housing, and a core shaft connecting the friction disc housing and the trigger damping plate, wherein the arc-shaped wave surfaces on both sides of the trigger damping plate correspond to the shapes of the inner walls of the friction disc housings on both sides, wherein the trigger damping plate is disposable, and a new energy-absorbing friction disc or trigger damping plate is required after each destruction; Among them, the baffle point limiting mechanism includes: a rotating baffle, a fixed baffle, and an anti-rebound cam. The rotating baffle and the anti-rebound cam are installed on the core shaft and are located on both sides of the unlocking bracket. The fixed baffle is installed on the unlocking bracket and is located on one side of the anti-rebound cam. The core shaft synchronously drives the rotating baffle and the anti-rebound cam to rotate. The rotating baffle stops rotating after contacting the fixed baffle. The anti-rebound cam overcomes the spring tension and contacts the fixed baffle during the rotation process, so that the energy-absorbing friction disk stops moving in the opposite direction due to the inertial force.

2. The zero-gravity seat back collision energy absorption locking mechanism according to claim 1, characterized in that: The bottoms of the rotating baffle and the fixed baffle are both provided with inwardly curved bevel edges, and the rotating baffle and the fixed baffle are in contact with each other through their respective bevel edges.

3. The zero-gravity seat back collision energy absorption locking mechanism according to claim 1, characterized in that: The two angle adjusters are symmetrically mounted on the backrest connecting plate on the backrest frame, and correspondingly, one backrest energy absorption locking mechanism is mounted on each of the angle adjusters.

4. The zero-gravity seat back collision energy absorption locking mechanism according to claim 1, characterized in that: The spring is a coil spring sleeved on the rotating shaft of the cam locking plate, or a tension spring for pulling the cam locking plate.

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