TWI862388B - Seat belt buckle, seat belt fastener, and vehicle steering wheel locking method - Google Patents

Abstract

A seat belt buckle includes a housing, and a buckling assembly and a locking assembly mounted on the housing. The buckling assembly has a buckling slider, a tripping button, and a stop slider. The locking assembly has an engaging panel and a lock. When a tongue connected to a belt of a vehicle is inserted into a tongue hole of the buckle, the tongue is buckled with the buckling slider. When the lock is switched to a locking state, the lock drives the engaging panel to engage with the tripping button, so as to prevent the tripping button from being pressed and causing the tongue to be separated. A user can hold the tongue that is connected to the belt to pass through a steering wheel of the vehicle and then to insert the tongue into the buckle and switch the lock to the locking state, so as to limit a rotation angle of the vehicle and to effectively prevent the vehicle from being stolen.

Description

Seat belt buckle, seat belt buckle and steering wheel locking method for automobile

The present invention relates to a safety belt buckle, in particular to a safety belt buckle capable of locking a buckle plate in a buckle seat.

In order to prevent the car from being stolen, a common practice is to use a steering wheel lock to fix the steering wheel of the car so that the steering wheel cannot be turned, thereby achieving the purpose of preventing the thief from driving away the car.

The main structure of the steering wheel lock in the prior art is a long rod with a lock on the rod. However, in order to prevent the rod from being directly cut off by thieves, the steering wheel in the prior art must be made of a strong structure and material, which not only leads to high manufacturing costs, large size and heavy weight of the steering wheel lock, but also makes the steering wheel lock difficult to carry and takes up space. Therefore, the prior art method of preventing automobile theft still needs to be further improved.

In view of the problems existing in the prior art, the invention aims to provide a seat belt buckle, wherein the buckle seat has a locking mechanism, so that the user can wrap the belt around the steering wheel and then lock the buckle in the buckle seat, thereby limiting the rotation angle of the steering wheel.

In order to achieve the above-mentioned creative purpose, the technical means adopted by the present invention is to provide a seat belt buckle seat, which includes: a shell, which is hollow, and a pressure button hole and a buckle plate hole are formed on the shell; a buckle assembly, which is installed on the shell, and the buckle assembly has a buckle slide, an unbuckle pressure button and a stop slide; the buckle slide is arranged in the shell, and can move back and forth between an unbuckle position and a buckle position; the unbuckle pressure button is arranged in the pressure button hole of the shell, and can move back and forth between a starting position and a pressing position, when the unbuckle pressure button moves toward the pressing position of the unbuckle pressure button, the unbuckle pressure button drives The buckle slide moves toward the unlocking position; the stop slide is arranged in the housing and can move back and forth between a starting position and a pressing position. When the stop slide is at the starting position, the stop slide stops the buckle slide between the unlocking position and the buckle position. When the stop slide moves toward the pressing position of the stop slide, the stop slide and the buckle slide disengage from each other, so that the buckle slide can move to the buckle position; A locking assembly is mounted on the housing, and the locking assembly has a latch plate and a lock; the latch plate is disposed in the housing and can move back and forth between an unlocking position and a locking position, and the latch plate has at least one limiting leg extending toward the unlocking button. When the lock is in the locked position, the at least one limiting support leg clamps the release button at the starting position of the release button; the lock is installed on the housing and has a lock spindle. The lock has a locked state and an unlocked state. When the lock is in the locked state, the latch plate is driven by the lock spindle to be positioned in the locked position.

The seat belt buckle seat, wherein: the buckling slide can be driven by at least one first elastic member to move toward the buckling position; the buckle release button can be driven by at least one second elastic member to move toward the starting position of the buckle release button, and can be pressed to move toward the pressed position of the buckle release button; the stop slide can be driven by at least one third elastic member to move toward the starting position of the stop slide, and can be pressed to move toward the pressed position of the stop slide.

In the safety belt buckle seat, the latch plate can be driven by at least a fourth elastic member to move toward the unlocking position. When the lock is in the upper locking state, the latch plate is pushed up by the lock spindle and positioned in the locking position.

In the seat belt buckle seat, the lock can be a push-type lock, and the lock shaft is axially extended and contracted to drive the latch plate when switching to the locking state or the unlocking state. In addition, the lock can also be a rotary lock.

In the buckle seat for seat belt: The buckle release button is arranged in the button hole of the housing so as to be movable up and down, and the buckle release button has a driving part, and the driving part has at least one driving plate, and a guide bevel is formed on each of the at least one driving plates, and the guide bevel extends obliquely downward and backward toward one rear side wall of the housing; The buckle slide block is arranged in the housing so as to be movable forward and backward, and the buckle slide block has at least one extension rod, and the position of the at least one extension rod corresponds to the driving part of the buckle release button, and abuts against the guide bevel of the at least one driving plate of the buckle release button.

In the seat belt buckle, the at least one driving plate can include two driving plates spaced apart from each other, the at least one extension rod can include two extension rods, the two extension rods are respectively laterally protruded on opposite sides of the buckling slide, the buckling slide is arranged between the two driving plates, and the two extension rods are respectively against the guide bevel edges of the two driving plates of the unlocking button.

In the buckle seat for the safety belt: The stopper slide is arranged in the housing so as to be movable up and down, and a push-resistance slope is formed on the stopper slide, and the push-resistance slope extends downward and forward toward a front side wall of the housing; The buckle slide has a buckle protrusion protruding toward a rear side wall of the housing, and a guide slope and a distal edge are formed on the buckle protrusion, and the guide slope extends obliquely downward and backward toward the rear side wall of the housing, and the distal edge is an end of the buckle protrusion facing the rear side wall of the housing.

In order to achieve the above-mentioned creative purpose, another technical means adopted by the present invention is to provide a seat belt buckle, which includes: A seat belt buckle seat as described above; and A buckle plate, one end of which is formed with a buckle hole, and the end of the buckle plate formed with the buckle hole is detachably inserted into the buckle plate hole of the housing of the buckle seat. When the buckle plate is inserted into the buckle plate hole, the buckle slide is pushed and moved to the buckle position, and is correspondingly buckled in the buckle hole of the buckle plate.

In the safety belt buckle, the other end of the buckle can be connected to a webbing.

In order to achieve the above-mentioned creative purpose, another technical means adopted by the present invention is to provide a method for locking the steering wheel of a car, which includes: Providing a seat belt buckle seat as described above, the buckle seat is installed on one side of a seat of the car; Providing a webbing, the webbing is installed on a car body and is located on the other side of the seat, and the length of the webbing is retractable; Providing a buckle plate, one end of the buckle plate is formed with a buckle hole, and the other end is connected to the webbing; After driving the buckle plate and the webbing through a steering wheel of the car, the buckle plate is inserted into the buckle seat.

In the steering wheel locking method of a car, a micro switch is installed in the buckle seat, and the micro switch is electrically connected to a control unit of the car; when the lock is in the locked state, the micro switch is triggered to send a signal to the control unit, switching the car to a power-off state and unable to be started; when the lock is in the unlocked state, the micro switch stops sending the signal to the control unit, and the car returns to a ready-to-start state and can be started.

With the above-mentioned design, when getting off the car, the user can first pass the buckle connected to the webbing through the steering wheel of the car, so that the webbing is wrapped around the steering wheel, and then insert the buckle into the buckle seat and switch the lock to the locked state, so as to limit the rotation angle of the steering wheel and prevent the car from being stolen by someone with bad intentions.

The following is a combination of drawings and preferred embodiments of the present invention to further illustrate the technical means adopted by the present invention to achieve the predetermined creative purpose.

Referring to Fig. 1, Fig. 2 and Fig. 14, the safety belt buckle of the present invention comprises a buckle 1 and a buckle seat 2. Further referring to Fig. 7, Fig. 8 and Fig. 14, one end of the buckle 1 is connected to a webbing 3, and the other end is formed with a buckle hole 10, and the end of the buckle 1 formed with the buckle hole 10 is used to be detachably inserted into the buckle seat 2.

3 to 5 , the buckle seat 2 is mounted on one side of a seat 4 of a car. The buckle seat 2 has a locking mechanism and comprises a housing 20 , a buckle assembly 30 and a locking assembly 40 .

The shell 20 is hollow, so that the two opposite sides of the shell 20 are respectively a front side wall and a rear side wall. The top of the shell 20 is formed with a pressure button hole 21 and a buckle hole 22 arranged adjacent to each other. The pressure button hole 21 is located on a side close to the front side wall, and the buckle hole 22 is located on a side close to the rear side wall.

The buckle assembly 30 is mounted on the housing 20 , and has a buckle slide block 31 , a release button 32 , and a stop slide block 33 .

The buckle slide 31 is disposed in the housing 20 and can move back and forth between an unfastening position and a buckling position. The unfastening position corresponds to being located below the pressure button hole 21, and the buckling position corresponds to being located below the buckle plate hole 22. The buckle slide 31 is driven by at least one first elastic member 34 to move toward the buckling position.

The unbuttoning button 32 is arranged in the button hole 21 of the housing 20 and can move back and forth between a starting position and a pressing position. The unbuttoning button 32 is driven by at least one second elastic member 35 to move toward the starting position of the unbuttoning button 32. The unbuttoning button 32 can be pressed to move toward the pressing position of the unbuttoning button 32 and drive the buckle slider 31 to move toward the unbuttoning position.

3, 6 and 7, specifically, the release button 32 is movably disposed in the button hole 21 of the housing 20, and the release button 32 has a driving portion 321, and the driving portion 321 has at least one driving plate 322, and each of the at least one driving plates 322 is formed with a guide bevel 323, and the guide bevel 323 is directed toward the rear of the housing 20. The side wall extends obliquely downward and backward; the buckle slide block 31 can move back and forth between the front side wall and the rear side wall of the housing 20, and the buckle slide block 31 has at least one extension rod 311, the position of the at least one extension rod 311 corresponds to the driving portion 321 of the unfastening pressure button 32, and can abut against the guide bevel 323 of the at least one driving plate 322 of the unfastening pressure button 32. Thereby, when the unfastening pressure button 32 is pressed and moves downward toward the pressing position of the unfastening pressure button 32, the buckle slide block 31 will be driven by the guide bevel 323 of the two driving plates 322 to move toward the front side wall of the housing 20 toward the unfastening position. When the force pressing the release button 32 is released, the elastic restoring force of the second elastic member 35 pushes the release button 32 toward the initial position of the release button 32, and the elastic restoring force of the first elastic member 34 pushes the buckle slider 31 toward the buckle position.

As shown in FIG. 3 , in a specific embodiment of the present invention, the at least one driving plate 322 includes two driving plates 322 disposed at intervals, and the at least one extension rod 311 includes two extension rods 311, and the two extension rods 311 are respectively protruded laterally on opposite sides of the buckle slider 31, and the buckle slider 31 is disposed between the two driving plates 322, so that the two extension rods 311 are respectively positioned to correspond to the guide bevel edges 323 of the two driving plates 322 abutting against the unlocking button 32, so that when the unlocking button 32 is pressed, the two driving plates 322 can abut against the two extension rods 311 and drive the buckle slider 31.

3, 4 and 6, the stop slider 33 is disposed in the housing 20 and can move back and forth between a starting position and a pressing position. The stop slider 33 is driven by at least one third elastic member 36 to move toward the starting position of the stop slider 33, and the buckling slider 31 is stopped between the unfastening position and the buckling position. When the stop slider 33 is pressed and moves to the pressing position of the stop slider 33, the stop slider 33 is disengaged from the buckling slider 31, so that the buckling slider 31 is pushed by the first elastic member 34 and moves to the buckling position.

Specifically, the stop slider 33 is arranged in the shell 20 so as to be movable up and down, and a push-resistance inclined surface 331 is formed on the stop slider 33, and the push-resistance inclined surface 331 extends downward and forward toward the front side wall of the shell 20; the buckling slider 31 has a buckling protrusion 312 protruding toward the rear side wall of the shell 20, and a guide bevel 313 and a distal edge 314 are formed on the buckling protrusion 312, and the guide bevel 313 extends obliquely downward and backward toward the rear side wall of the shell 20, and the distal edge 314 is one end of the buckling protrusion 312 facing the rear side wall of the shell 20. As shown in FIG. 4 , when the stop slider 33 is at the starting position of the stop slider 33 , the distal edge 314 abuts against the push-in inclined surface 331 of the stop slider 33 , thereby utilizing the stop slider 33 to stop the buckle slider 31 between the unlocking position and the buckle position; as shown in FIG. 6 , when the stop slider 33 is at the starting position of the stop slider 33 , the distal edge 314 abuts against the push-in inclined surface 331 of the stop slider 33 . When the block 33 is pressed and moves toward the pressing position of the stop slide 33, the distal edge 314 of the locking protrusion 312 of the locking slide 31 moves along the pushing inclined surface 331 of the stop slide 33 until it is separated from the stop slide 33 and is pushed by the first elastic member 34 to move to the locking position.

3 , 5 , 9 and 10 , the locking assembly 40 is mounted on the housing 20 , and the locking assembly 40 has a latch plate 41 and a lock 43 .

The latch plate 41 is disposed in the housing 20 and can move back and forth between an unlocking position and a locking position. The latch plate 41 has at least one limiting foot 411, and the at least one limiting foot 411 extends toward the unlocking button 32. When the latch plate 41 moves to the locking position, the at least one limiting foot 411 secures the unlocking button 32 at the starting position of the unlocking button 32.

The lock 43 is mounted on the housing 20 and has a lock spindle 431. The position of the lock spindle corresponds to the latch plate 41 and can drive the latch plate 41. The lock 43 has a locked state and an unlocked state. In the locked state, the latch plate 41 is driven by the lock spindle 431 to be positioned in the locked position; in the unlocked state, the latch plate 41 can be driven to move to the unlocked position.

By positioning the latch plate 41 at the locking position, the at least one limiting leg 411 latches the release button 32 at the initial position of the release button 32, so that the release button 32 cannot be pressed to the pressing position of the release button 32, thereby preventing the buckle slide block 31 from moving to the release position. When the latch plate 41 moves back to the unlocking position, the release button 32 can be pressed to the pressing position of the release button 32, so that the buckle slide block 31 can move to the release position.

Specifically, the latch plate 41 can be driven by at least one fourth elastic member 42 to move toward the unlocking position, and the lock shaft 431 of the lock 43 can push the latch plate 41 to move to the locking position during the locking process so that the release button 32 cannot be pressed. When the lock 43 is switched to the unlocking state, the latch plate 41 is pushed by the fourth elastic member 42 and moves in the opposite direction to the unlocking position, so that the release button 32 can be pressed to the pressed position of the release button 32. However, the method of driving the latch plate 41 is not limited to the above, and the latch plate 41 can also be directly driven by the lock shaft 431 of the lock 43 to move back and forth between the unlocking position and the locking position.

In a specific embodiment of the present invention, the lock 43 is a push-type lock, and the lock shaft 431 can be axially extended and retracted to drive the latch plate 41 when switching to the upper locking state or the unlocking state, but it is not limited to this. The lock 43 can also be a rotary lock or other types of locks, as long as it can drive the latch plate 41 to move back and forth between the unlocking position and the locking position.

Referring to FIGS. 11 to 13 , more specifically, the lock 43 can include a lock shell 433, an upper bead seat 434 and a lower bead seat 435 installed in the lock shell 433, a plurality of lock column assemblies 437 and the lock core shaft 431 arranged in the upper bead seat 434 and the lower bead seat 435. A braking groove 436 is formed inwardly on one inner wall surface of the lower bead seat 435, and the bottom of the braking groove 436 is in the shape of a concave arc surface. The lock core shaft 431 axially penetrates the upper bead seat 434 and the lower bead seat 435. An axial elastic member 440 pushes the lock core shaft 431 to protrude outward toward the front end of the upper bead seat 434 in a natural state. The lock core shaft 43 1 is concavely formed on one of the outer wall surfaces of the lower bead seat 435 to form a radial groove 432. A positioning column 438 and a radial elastic member 439 are provided in the radial groove 432. The radial elastic member 439 is located between the positioning column 438 and the bottom of the radial groove 432. The positioning column 438 can selectively protrude into the detent groove 436 of the lower bead seat 435. The lock shaft 431 can be pressed to protrude from the lower bead seat 435 from the rear end of the lower bead seat 435 in the axial direction, and the positioning column 438 is fixed in the detent groove 436 of the lower bead seat 435 to maintain the state of protruding from the lower bead seat 435. When the lock shaft 431 is pressed by a key used in conjunction with the lock 43, the locking shaft 431 is locked in the detent groove 436 of the lower bead seat 435. After being driven to rotate, the positioning column 438 can leave the braking groove 436, and in the process of moving, the positioning column 438 is pressed into the radial groove 432 of the lock shaft 431, and the elastic restoring force of the axial elastic member 440 pushes the lock shaft 431 to protrude from the front end of the upper bead seat 434 out of the lock shell 433.

6 to 8 , when the buckle 1 of the seat belt buckle is inserted into the buckle hole 22 of the buckle seat 2, the buckle 1 will first push the stop slider 33 downward, and then hit the buckle protrusion 312 of the buckle slider 31, and squeeze the buckle slider 31 toward the unfastening position along the guide slope 313 of the buckle protrusion 312, until the position of the buckle hole 10 of the buckle 1 corresponds to the buckle slider 31, and the buckle slider 31 is pushed by the first elastic member 34 to move to the buckle position, and is correspondingly buckled in the buckle hole 10 of the buckle 1.

Further referring to FIGS. 8 to 10 , the user then switches the lock 43 to the upper locking state, allowing the lock shaft 431 to push the latch plate 41 to move to the locking position, so that the at least one limiting leg 411 of the latch plate 41 latches the release button 32 at the starting position of the release button 32, thereby preventing the release button 32 from being further pressed, thereby locking the buckle plate 1 in the buckle seat 2.

14 and 15 , the buckle seat 2 can be further used to lock the steering wheel 5 of the car, wherein the buckle seat 2 is installed on one side of the seat 4, and the belt 3 is installed on a car body 6 on the other side of the seat 4. When getting off the car, the user passes the buckle 1 connected to the belt 3 through the steering wheel 5 of the car, so that the belt 3 is wound around the steering wheel 5, and then the buckle 1 is inserted into the buckle seat 2, and the lock 43 is switched to the locked state, so that the rotation angle of the steering wheel 5 can be limited, thereby preventing the car from being stolen by someone with bad intentions. Furthermore, a micro switch 8 can be installed in the buckle seat 2, and the micro switch 8 is electrically connected to a control unit 7 of the car. When the lock 43 is in the locked state, the micro switch 8 is triggered to send a signal to the control unit 7, switching the car to a power-off state. At this time, the user cannot start the car after inserting the car key into the keyhole; when the lock 43 is switched from the locked state to the unlocked state, the micro switch 8 stops sending the signal to the control unit 7, restoring the car to a ready-to-start state. At this time, the user can start the car by inserting the car key into the keyhole, thereby further preventing the car from being stolen.

The above is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any simple modification, equivalent changes and modifications made to the above embodiments by any technician familiar with the profession without departing from the scope of the technical solution of the present invention and based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

1: buckle plate 10: buckle hole 2: buckle seat 20: housing 21: button hole 22: buckle plate hole 30: buckle assembly 31: buckle slider 311: extension rod 312: buckle protrusion 313: guide bevel 314: distal edge 32: release button 321: drive part 322: drive plate 323: guide bevel 33: stop slider 331: push bevel 34: first elastic member 35: second elastic member 36: third elastic member 40: locking assembly 41: latch plate 411: limit support foot 42: Fourth elastic member 43: Locking device 431: Locking shaft 432: Radial groove 433: Lock shell 434: Upper bead seat 435: Lower bead seat 436: Braking groove 437: Lock column assembly 438: Positioning column 439: Radial elastic member 440: Axial elastic member 3: Webbing 4: Seat 5: Steering wheel 6: Car shell 7: Control unit 8: Micro switch

Figure 1 is a front three-dimensional external view of the buckle seat of the present invention. Figure 2 is a rear three-dimensional external view of the buckle seat of the present invention. Figure 3 is a three-dimensional exploded view of the buckle seat of the present invention. Figure 4 is a side cross-sectional view of the buckle seat of the present invention in an unlocked state. Figure 5 is a top cross-sectional view of the buckle seat of the present invention in an unlocked state. Figures 6 and 7 are side cross-sectional action schematic diagrams of the buckle seat and the buckle plate of the present invention in a state of disengagement from the buckle. Figure 8 is a side cross-sectional view of the seat belt buckle of the present invention in the locking process. Figure 9 is a top cross-sectional view of the seat belt buckle of the present invention in the locking process. Figure 10 is a side cross-sectional view of the buckle seat of the present invention along the A-A section line of Figure 5, wherein the buckle seat is in a locked state. FIG11 is a three-dimensional exploded view of the lock of the buckle seat of the present invention. FIG12 is an end view cross-sectional view of the buckle seat of the present invention, wherein the lock of the buckle seat is in a locked state. FIG13 is a top view cross-sectional view of the seat belt buckle of the present invention, wherein the lock of the buckle seat is in an unlocked state. FIG14 is a side view schematic diagram of the seat belt buckle of the present invention used to lock the steering wheel of a car. FIG15 is a block schematic diagram of the lock of the buckle seat of the present invention electrically connected to the control unit of the car.

2: Buckle seat

20: Shell

21: Pressure button hole

22: Buckle hole

32: Unbutton button

Claims (14)

A seat belt buckle seat comprises a shell, a buckle assembly and a locking assembly, wherein: the shell is hollow, a button hole and a buckle plate hole are formed on the shell; the buckle assembly is mounted on the shell, and the buckle assembly has a buckle slide, an unlocking button and a stop slide; the buckle slide is arranged in the shell and can move back and forth between an unlocking position and a buckle position; the unlocking button is arranged on the shell The buckle-release button is arranged in the housing and can move back and forth between a starting position and a pressing position. When the buckle-release button moves toward the pressing position of the buckle-release button, the buckle-release button drives the buckle-connecting slide block to move toward the buckle-release position. The stop slide block is arranged in the housing and can move back and forth between a starting position and a pressing position. When the stop slide block is located at the starting position, the stop slide block stops the buckle-connecting slide block at the buckle-release position. When the stop slider moves toward the pressing position of the stop slider, the stop slider and the buckling slider are separated from each other, so that the buckling slider can move to the buckling position; the locking assembly is installed on the housing, and the locking assembly has a latch plate and a lock; the latch plate is arranged in the housing and can move back and forth between an unlocking position and a locking position, and the latch plate has at least one A limiting leg, at least one of the limiting legs extends toward the release button, and when the latch plate is in the locking position, the at least one limiting leg latches the release button at the starting position of the release button; the lock is mounted on the housing and has a locking spindle, and the lock has a locking state and an unlocking state. When the lock is in the locking state, the latch plate is driven by the locking spindle to be positioned in the locking position. The buckle seat for a safety belt as described in claim 1, wherein: the buckle slide is driven by at least one first elastic member to move toward the buckle position; the buckle release button is driven by at least one second elastic member to move toward the starting position of the buckle release button, and can be pressed to move toward the pressed position of the buckle release button; the stop slide is driven by at least one third elastic member to move toward the starting position of the stop slide, and can be pressed to move toward the pressed position of the stop slide. As described in claim 1, the buckle seat for the safety belt, wherein the latch plate is driven by at least a fourth elastic member to move toward the unlocking position, and when the lock is in the upper locking state, the latch plate is pushed up by the lock spindle and positioned in the locking position. As described in claim 2, the buckle seat for a safety belt, wherein the latch plate is driven by at least a fourth elastic member to move toward the unlocking position, and when the lock is in the upper locking state, the latch plate is pushed up by the lock spindle and positioned in the locking position. As described in claim 1, the seat belt buckle seat, wherein the lock is a push-type lock, and the lock shaft is axially extended and contracted to drive the latch plate when the lock is switched to the locked state or the unlocked state. A seat belt buckle as described in claim 1, wherein the lock is a rotary lock. A seat belt buckle as described in any one of claims 1 to 4, wherein: the unbuckling pressure button is disposed in the pressure button hole of the housing so as to be movable up and down, the unbuckling pressure button has a driving portion, the driving portion has at least one driving plate, each of the at least one driving plates is formed with a guide bevel, the guide bevel extends obliquely downward and backward toward a rear side wall of the housing; the buckling slide block is disposed in the housing so as to be movable forward and backward, the buckling slide block has at least one extension rod, the position of the at least one extension rod corresponds to the driving portion of the unbuckling pressure button, and abuts against the guide bevel of the at least one driving plate of the unbuckling pressure button. As described in claim 7, the buckle seat for a safety belt, wherein the at least one driving plate comprises two driving plates disposed at intervals, the at least one extension rod comprises two extension rods, the two extension rods protrude laterally and are formed on opposite sides of the buckle slide block, the buckle slide block is disposed between the two driving plates, and the two extension rods respectively abut against the guide bevel edges of the two driving plates of the release button. A seat belt buckle as described in any one of claims 1 to 4, wherein: the stopper slide is disposed in the housing so as to be movable up and down, and a push-resistance slope is formed on the stopper slide, and the push-resistance slope extends downward and forward toward a front side wall of the housing; the buckle slide has a buckle protrusion protruding toward a rear side wall of the housing, and a guide slope and a distal edge are formed on the buckle protrusion, and the guide slope extends obliquely downward and backward toward the rear side wall of the housing, and the distal edge is an end of the buckle protrusion facing the rear side wall of the housing. As described in claim 7, the seat belt buckle seat, wherein: the stopper slide is arranged in the housing so as to be movable up and down, and a push-resistance slope is formed on the stopper slide, and the push-resistance slope extends downward and forward toward a front side wall of the housing; the buckle slide has a buckle protrusion protruding toward the rear side wall of the housing, and a guide slope and a distal edge are formed on the buckle protrusion, and the guide slope extends obliquely downward and backward toward the rear side wall of the housing, and the distal edge is an end of the buckle protrusion facing the rear side wall of the housing. A seat belt buckle, comprising: a seat belt buckle seat as described in any one of claims 1 to 10; and a buckle plate, one end of which is formed with a buckle hole, the end of which is formed with the buckle hole is detachably inserted into the buckle hole of the housing of the buckle seat, when the buckle is inserted into the buckle hole, the buckle slide is pushed and moved to the buckle position, and is correspondingly buckled in the buckle hole of the buckle plate. A seat belt buckle as described in claim 11, wherein the other end of the buckle is connected to a webbing. A method for locking a steering wheel of a car, comprising: providing a seat belt buckle as described in any one of claims 1-10, the buckle being mounted on one side of a car seat; providing a webbing, the webbing being mounted on a car body and located on the other side of the car seat, the length of the webbing being retractable; providing a buckle, one end of the buckle being formed with a buckle hole and the other end being connected to the webbing; after driving the buckle and the webbing through a steering wheel of the car, the buckle is inserted into the buckle. As described in claim 13, a micro switch is installed in the buckle seat, and the micro switch is electrically connected to a control unit of the car; when the lock is in the locked state, the micro switch is triggered to send a signal to the control unit, switching the car to a power-off state and unable to be started; when the lock is in the unlocked state, the micro switch stops sending the signal to the control unit, and the car returns to a ready-to-start state and can be started.

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