Safety belt lock catch and vehicle

Abstract

The invention provides a safety belt lock catch and a vehicle, and belongs to the technical field of passenger protection. The safety belt lock catch comprises a lock catch body and a mounting seat assembly, the mounting seat assembly comprises a base, a mounting shaft, a bidirectional spring and a connecting rod, the connecting rod is movably mounted on the base through the mounting shaft, an arc-shaped hole is formed in the connecting rod, the lock catch body is mounted on the connecting rod, the bidirectional spring is provided with a spiral part, and the mounting shaft is sleeved with the spiral part. The spiral part extends to form a first arm, the first arm is connected with the base, the spiral part further extends to form a second arm and a third arm, the second arm and the third arm both extend into the arc-shaped hole, when the lock catch body is located at the C position, the third arm abuts against the hole wall of one end of the arc-shaped hole, and when the lock catch body is located at the B position, the second arm abuts against the hole wall of the other end of the arc-shaped hole. The second arm is configured to drive the lock catch body to reset from the B position to the A position, the third arm is configured to drive the lock catch body to reset from the C position to the A position, and the A position is located between the B position and the C position.

Description

Technical Field

[0001] The present invention relates to the technical field of passenger protection, and in particular to a seat belt buckle and a vehicle. Background Art

[0002] Seat belts and seat systems are important components of the automotive safety system. During a collision, the matching restraint of seat belts and seats can effectively reduce the damage caused to passengers by the collision and improve the collision safety performance of the entire vehicle. The seat design has many extended functions, such as flipping and folding. At present, the seat belt buckle uses soft webbing or metal arms to connect to the vehicle installation position.

[0003] When the seat is flipped and leveled, the buckle connected by the soft webbing is pressed on the floor. When the seat is reset, the passenger needs to manually pull the buckle out from under the seat cushion before using it. The operation space is insufficient and cumbersome, which is inconvenient for passengers. When the seat is flipped and leveled, the seat belt buckle and seat system with steel plate brackets have interference in the movement path, and the seat function cannot be effectively exerted.

[0004] like Fig.10 As shown, the prior art also provides a hard car seat safety belt buckle assembly, wherein the safety belt buckle unit is composed of a safety belt buckle 1', a buckle mounting plate 2', a buckle connecting plate 3', a return torsion spring 4' and an "L"-shaped safety belt mounting bracket 5'. The safety belt buckle 1' is arranged at the upper end of the buckle mounting plate 2', the lower end of the buckle mounting plate 2' can be movably hinged on the buckle connecting plate 3', the buckle connecting plate 3' is fixed on the safety belt mounting bracket 5', and the safety belt mounting bracket 5' is fixed on the car floor. In the initial state, the angle between the buckle mounting plate 2' and the horizontal plane is approximately 45 degrees, and at this time, the socket of the safety belt buckle 1' faces obliquely forward. When the backrest is folded down and flat, the backrest presses down the seat belt buckle 1', so that the seat belt buckle 1' drives the buckle mounting plate 2' to move. At this time, the angle between the buckle mounting plate 2' and the horizontal plane is approximately 0-15 degrees. At the same time, the buckle mounting plate 2' drives the torsion arm of the return torsion spring 4' to compress the return spring; when the backrest is flipped up and reset, the return torsion spring 4' releases the elastic force and drives the buckle mounting plate 2' to return to the initial angle.

[0005] Since the socket of the seat belt buckle 1' faces obliquely forward in the initial state, at this time, when the occupant fastens the seat belt, the seat belt slides down to the leg position. In the event of a collision, the human body moves forward, and the seat belt slides upward, which cannot completely restrain the human body, resulting in a large displacement and a risk of diving and slipping out. The human body is prone to secondary collision with the interior decoration of the car, and the protection effect is poor.

[0006] If the angle between the lock mounting plate 2' and the horizontal plane in the initial state is set to be approximately 100 degrees (that is, the insertion opening of the seat belt buckle 1' is approximately facing upwards), there is a problem that not only the limit activity range of the torsion arm of the return torsion spring 4' will be exceeded, causing the torsion arm of the return torsion spring 4' to break, but also the lock mounting plate 2' will not be able to move when the seat belt buckle 1' is pressed down by the backrest, resulting in the backrest being unable to fold flat. Summary of the invention

[0007] The purpose of the present invention is to provide a seat belt buckle, which can reduce the displacement of the human body caused by a collision, reduce the risk of the human body diving and slipping out due to a collision, and thus improve safety; and can automatically adjust the buckle position according to the activity of the seat cushion part, without the need for manual operation of the buckle position, so as to facilitate passengers to use.

[0008] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0009] According to one aspect of the present invention, a seat belt buckle is provided, comprising a buckle body and a mounting seat assembly, the mounting seat assembly comprising a base, a mounting shaft, a bidirectional spring and a connecting rod, the connecting rod being movably mounted on the base through the mounting shaft, the connecting rod being provided with an arc-shaped hole, the buckle body being mounted on the connecting rod, the bidirectional spring having a spiral portion, the spiral portion being sleeved on the mounting shaft, the spiral portion extending with a first arm, the first arm being connected to the base, the spiral portion also extending with a second arm and a third arm, the second arm and the third arm both extending into the arc-shaped hole, when the buckle body is located at position C, the third arm abuts against a hole wall at one end of the arc-shaped hole, when the buckle body is located at position B, the second arm abuts against a hole wall at the other end of the arc-shaped hole, the second arm is configured to drive the buckle body to reset from position B to position A, the third arm is configured to drive the buckle body to reset from position C to position A, and the position A is located between position B and position C.

[0010] According to an embodiment of the present invention, the first arm includes a first branch arm and a second branch arm, and the first branch arm and the second branch arm are formed by extending from radial ends of the spiral portion along a tangential direction and toward the base.

[0011] According to an embodiment of the present invention, the first arm and the second arm are connected and together form a U-shape with the opening facing away from the base, and the first arm and the second arm are respectively located on both sides of the installation axis.

[0012] According to an embodiment of the present invention, the second arm extends tangentially from one axial end of the spiral portion, the third arm extends tangentially from the other axial end of the spiral portion, and the second arm and the third arm are respectively located at two radial ends of the spiral portion.

[0013] According to one embodiment of the present invention, the second arm is bent to form a first bent arm parallel to the axial direction of the spiral portion, and the third arm is bent to form a second bent arm parallel to the first bent arm. When the lock body is located at the C position, the second bent arm abuts against the hole wall at one end of the arc-shaped hole; when the lock body is located at the B position, the first bent arm abuts against the hole wall at the other end of the arc-shaped hole.

[0014] According to one embodiment of the present invention, the base is U-shaped, and both side walls of the base are provided with a first mounting hole, one end of the connecting rod is provided with a second mounting hole, the mounting shaft is passed through the first mounting hole and the second mounting hole, and the bottom wall of the base is provided with a third mounting hole, and the first arm is inserted into the third mounting hole.

[0015] According to an embodiment of the present invention, the center of the arc-shaped hole and the center of the connecting rod are the same center.

[0016] The present invention also discloses a vehicle, comprising a vehicle body, a seat and the above-mentioned seat belt buckle, wherein the seat and the base are respectively arranged on the floor inside the vehicle body, and the base is located on one side of the seat, and the seat comprises a backrest portion and a cushion portion, the cushion portion abuts against a buckle body and limits the buckle body to a C position, and the cushion portion is separated from the buckle body when flipped up, and the third arm drives the buckle body to reset from the C position to the A position, and when the backrest portion is flipped down, the first side of the buckle body is pressed down and drives the buckle body to move from the A position to the B position.

[0017] According to one embodiment of the present invention, a guide surface facing the lock body is provided on one side of the cushion portion. When the cushion portion is flipped down and reset, the guide surface abuts against the second side of the lock body and guides the lock body from position A to position C.

[0018] According to one embodiment of the present invention, the guide surface includes a rounded surface, a curved surface and a flat surface, the cushion portion has a first side close to the backrest portion and a second side away from the backrest portion, the rounded surface protrudes obliquely downward toward the first side of the cushion portion, the curved surface protrudes toward the second side of the cushion portion, the flat surface extends along the thickness direction of the cushion portion, and the rounded surface, the curved surface and the flat surface are connected in sequence from bottom to top.

[0019] An embodiment of the present invention has the following advantages or beneficial effects:

[0020] A seat belt buckle of the present invention includes a buckle body and a mounting seat assembly, the mounting seat assembly includes a base, a mounting shaft, a bidirectional spring and a connecting rod, the connecting rod is movably mounted on the base through the mounting shaft, the connecting rod is provided with an arc-shaped hole, the buckle body is mounted on the connecting rod, the bidirectional spring has a spiral portion, the spiral portion is sleeved on the mounting shaft, a first arm is extended from the spiral portion, the first arm is connected to the base, a second arm and a third arm are further extended from the spiral portion, the second arm and the third arm both extend into the arc-shaped hole, when the buckle body is located at the C position, the third arm abuts against a hole wall at one end of the arc-shaped hole, when the buckle body is located at the B position, the second arm abuts against a hole wall at the other end of the arc-shaped hole, the second arm is configured to drive the buckle body to reset from the B position to the A position, and the third arm is configured to drive the buckle body to reset from the C position to the A position, and the A position is located between the B position and the C position. Position A is the position of the lock body when the spring force of the bidirectional spring is in a balanced state, position B is the position of the lock body when the backrest is folded down, and position C is the position of the lock body after the backrest is folded up and restored and the seat cushion is folded down and restored.

[0021] The seat belt buckle of the present invention is installed on the floor of one side of the seat, and a preset installation angle is designed for the base of the seat belt buckle. Under the preset installation angle, when the buckle body is located at position A when the spring force is balanced, the backrest of the seat is turned down and a downward pressure is applied to the first side of the buckle body facing the backrest, the buckle body can rotate and the buckle body can only rotate from position A to position B, and when the backrest presses down the buckle body and the connecting rod is located at position B, the backrest is in a horizontal state, the backrest is folded flat in place, the seat belt buckle and the backrest are moved together, and the folding limit of the backrest is avoided.

[0022] In the initial state, the guide surface of the cushion part limits the lock body to the C position, which is the working position of the lock body. In the C position, the plug interface of the lock body faces upward, which reduces the displacement of the human body caused by collision and reduces the risk of human body diving and slipping out due to collision, thereby improving safety. In the C position, the connecting rod compresses the bidirectional spring through the third arm. At this time, the second arm is located in the middle of the arc hole and does not abut against the hole wall of the arc hole;

[0023] When the backrest needs to be laid flat, the rear part of the cushion is first flipped up. Since the guide surface of the cushion is separated from the lock body, the third arm applies torque to drive the connecting rod and drive the lock body to return from position C to position A, the force balance point of the bidirectional spring. At position A, the third arm abuts against the hole wall of the arc hole close to position B, and the second arm abuts against the hole wall of the arc hole close to position C, so that the connecting rod and the lock body are limited at position A.

[0024] Secondly, when the backrest is turned down and a downward pressure is applied to the first side of the lock body, the connecting rod rotates from position A to position B;

[0025] When the backrest presses down the lock body to the B position, the backrest is laid flat in place, and at the same time, the connecting rod compresses the bidirectional spring through the second arm. When in the B position, the third arm is located in the middle of the arc hole and does not abut against the hole wall of the arc hole;

[0026] When the backrest is flipped up and reset, the second arm drives the connecting rod to reset to the force balance point A of the bidirectional spring;

[0027] Then the cushion part is flipped down, and when the lower end of the guide surface of the cushion part abuts against the second side of the lock body, the lock body rotates along the guide surface toward the C position;

[0028] When the seat cushion part is flipped down into place, the guide surface of the seat cushion part limits the lock body at the C position, and the seat adjustment is completed.

[0029] The seat belt buckle of the present invention realizes the improvement of the movable range of the lock body because the lock body moves between the C position and the B position, so that the insertion port of the lock body can move upward, obliquely forward and forward, so that in the initial state, the seat cushion portion limits the lock body at the C position, so as to reduce the displacement of the human body caused by collision, reduce the risk of the human body diving and slipping out due to collision, and thus realize the improvement of safety; when the backrest is folded flat, the lock body automatically returns to the A position after the seat cushion portion is flipped up, so that when the backrest presses down the lock body, it can drive the connecting rod to move with it to realize the folding of the backrest; when the backrest is flipped up and reset, the lock body automatically returns to the A position, and when the seat cushion portion is flipped down and reset, the seat cushion portion pushes the lock body from the A position to and limits it at the C position, so that the seat belt buckle automatically moves between the C position and the A position according to the movement of the seat cushion portion, and there is no need to manually operate the lock position and position, so as to realize the convenience of use by passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0031] Figure 1 is a perspective view of a seat belt buckle according to an exemplary embodiment.

[0032] Figure 2 1 is a state diagram showing that the lock body rotates from position A to position B and from position A to position C according to an exemplary embodiment.

[0033] Figure 3 is a perspective view of a bidirectional spring according to an exemplary embodiment.

[0034] Figure 4 It is a schematic diagram showing that the cushion portion limits the lock body at the C position according to an exemplary embodiment.

[0035] Figure 5 It is a schematic diagram showing that the lock body rotates to position A after the seat cushion portion is flipped up according to an exemplary embodiment.

[0036] Figure 6 is a schematic diagram showing a backrest portion abutting against a first side of a buckle body according to an exemplary embodiment.

[0037] Figure 7 is a schematic diagram showing the backrest portion and the lock body being pressed toward position B according to an exemplary embodiment.

[0038] Figure 8 1 is a schematic diagram showing a guide surface of a cushion portion abutting against a second side of a latch body according to an exemplary embodiment.

[0039] Fig. 9 A schematic diagram showing the angle between the center line E1 of the connecting rod and the horizontal plane H1 when the lock body is in position A; a schematic diagram showing the angle between the center line E1 of the connecting rod and the horizontal plane H1 when the lock body is in position B; a schematic diagram showing the angle between the center line E1 of the connecting rod and the horizontal plane H1 when the lock body is in position C; and a schematic diagram showing the angle between the bottom wall of the base and the horizontal plane H2.

[0040] Fig.10 The present invention is a side view of a hard automobile seat belt buckle assembly in the prior art.

[0041] The reference numerals are described as follows:

[0042] 1. Lock body; 11. First side; 12. Second side; 2. Mounting seat assembly; 21. Base; 211. Third mounting hole; 212. Bottom wall; 22. Mounting shaft; 23. Bidirectional spring; 231. Spiral portion; 232. First arm; 2321. First support arm; 2322. Second support arm; 233. Second arm; 2331. First bending arm; 234. Third arm; 2341. Second bending arm; 24. Connecting rod; 241. Arc hole; 3. Backrest; 4. Cushion portion; 41. Guide surface; 411. Rounded surface; 412. Arc surface; 413. Straight surface. DETAILED DESCRIPTION

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0044] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0045] like Figure 1-9 As shown, a seat belt buckle according to an embodiment of the present invention comprises a buckle body 1 and a mounting seat assembly 2 , wherein the mounting seat assembly 2 comprises a base 21 , a mounting shaft 22 , a bidirectional spring 23 and a connecting rod 24 .

[0046] The lock body 1 includes a shell, a switch button assembly and a locking assembly arranged in the shell. The switch button assembly can be movably mounted on the shell, and the switch button assembly is connected to the locking assembly. Pressing the switch button assembly can drive the locking assembly to move. When the seat belt plug is inserted into the shell, the locking assembly locks the full belt plug. When the switch button assembly is pressed, the lock of the seat belt plug is released.

[0047] The lower end of the connecting rod 24 is movably mounted on the base 21 through the mounting shaft 22 . The connecting rod 24 is provided with an arc-shaped hole 241 . The shell of the lock body 1 is fixedly mounted on the upper end of the connecting rod 24 .

[0048] The bidirectional spring 23 has a spiral portion 231 which is an axial spiral and forms a straight cylinder. The spiral portion 231 is sleeved on the mounting shaft 22 . A first arm 232 extends from the spiral portion 231 . The first arm 232 is connected to the base 21 and is configured to prevent the spiral portion 231 from rotating.

[0049] like Figure 1-3 As shown, the spiral portion 231 also extends a second arm 233 and a third arm 234, and the second arm 233 and the third arm 234 both extend into the arc-shaped hole 241. When the lock body 1 is located at the C position, the third arm 234 abuts against one end hole wall of the arc-shaped hole 241. When the lock body 1 is located at the B position, the second arm 233 abuts against the other end hole wall of the arc-shaped hole 241. When the lock body 1 is located at the A position, the second arm 233 and the third arm 234 abut against the two end hole walls of the arc-shaped hole 241 respectively.

[0050] The second arm 233 is configured to drive the lock body 1 to reset from position B to position A, and the third arm 234 is configured to drive the lock body 1 to reset from position C to position A, and position A is located between position B and position C. Position A is the position of the lock body 1 when the spring force of the bidirectional spring 23 is in a balanced state, position B is the position of the lock body 1 when the backrest 3 is folded down, and position C is the position after the backrest 3 is flipped up and reset and the seat cushion is flipped down and reset.

[0051] like Figure 4As shown, the seat belt buckle of the present invention is installed on the floor on one side of the seat, and a preset installation angle is designed for the base 21 of the seat belt buckle, for example, Fig. 9 As shown, the preset installation angle is 13-23 degrees between the bottom wall 212 of the base 21 and the horizontal plane H2. Under this preset installation angle, when the lock body 1 is in the A position when the spring force is balanced, the plug of the lock body 1 faces obliquely forward; when the backrest 3 of the seat is turned down and downward pressure is applied to the upper end of the first side 11 of the lock body 1 facing the backrest 3, the lock body 1 can rotate and the lock body 1 and the connecting rod 24 can only rotate from the A position to the B position. When the backrest 3 presses the lock body 1 downward and is located in the B position, the backrest 3 is in a horizontal state, and the backrest 3 is folded flat in place, so that the seat belt buckle and the backrest 3 follow each other, avoiding the folding limit of the backrest 3.

[0052] In the initial state, the guide surface 41 of the cushion portion 4 limits the lock body 1 to the C position, which is the working position of the lock body 1. In the C position, the plug of the lock body 1 faces upward. At this time, when the safety belt is fastened, the fit of the safety belt waistband and the human body passes through the hip bone position. In the event of a collision, the human body is subjected to the pullback force of the safety belt waistband through the human body's center of mass (point H). At this time, the displacement of the human body caused by the collision is minimal, and the risk of the human body diving and slipping out due to the collision is minimal, thereby achieving improved safety. In the C position, the connecting rod 24 compresses the bidirectional spring 23 through the third arm 234. At this time, the second arm 233 is located in the middle of the arc hole 241 and does not abut against the hole wall of the arc hole 241.

[0053] like Figure 5 As shown, when the backrest portion 3 needs to be laid flat, the rear portion of the cushion portion 4 is first flipped upward. Since the guide surface 41 of the cushion portion 4 is separated from the lock body 1, the third arm 234 releases the elastic force and drives the connecting rod 24 and drives the lock body 1 to reset from the C position to the force balance point A position of the two-way spring. When the connecting rod 24 is at the A position, the third arm 234 abuts against the hole wall of the arc hole 241 on the side close to the B position, and the second arm 233 abuts against the hole wall of the arc hole 241 on the side close to the C position, so that when the connecting rod 24 is not subjected to external force, the second arm 233 and the third arm 234 jointly limit the connecting rod 24 to the A position.

[0054] At the same time, if Figure 6 As shown, when the connecting rod 24 is at the A position, when the backrest portion 3 is flipped down to apply downward pressure to the first side 11 of the lock body 1, the connecting rod 24 rotates toward the B position.

[0055] like Figure 7As shown, when the backrest portion 3 presses down the lock body 1 to the B position, the backrest portion 3 is laid flat in place. At the same time, the connecting rod 24 compresses the bidirectional spring 23 through the second arm 233. When in the B position, the third arm 234 is located in the middle of the arc hole and does not abut against the hole wall of the arc hole 241.

[0056] When the backrest 3 is flipped up and reset, the second arm 233 drives the connecting rod 24 to reset to the force balance point A of the bidirectional spring. Figure 5 shown.

[0057] like Figure 8 As shown, the cushion portion 4 is then folded down, and when the lower end of the guide surface 41 of the cushion portion 4 abuts against the second side of the lock body 1 , the lock body 1 rotates along the guide surface 41 toward the C position.

[0058] Finally Figure 4 As shown, when the cushion portion 4 is flipped down to the right position, the guide surface 41 of the cushion portion 4 limits the lock body 1 at the C position.

[0059] The seat belt buckle of the present invention realizes the movable range of the lifting connecting rod 24 due to the movement of the connecting rod 24 between the C position and the B position, so that the insertion port of the lock buckle body 1 can move upward, obliquely forward and forward, so that in the initial state, the cushion part 4 limits the lock buckle body 1 at the C position, thereby reducing the displacement of the human body caused by collision, reducing the risk of the human body diving and slipping out due to collision, and thus improving safety; when the backrest 3 is folded flat, the seat cushion part 4 is flipped up and the lock buckle body 1 automatically returns to the A position, so that when the backrest 3 presses down the lock buckle body 1, it can drive the connecting rod 24 to follow and realize the folding of the backrest 3; when the backrest 3 is flipped up and reset, the lock buckle body 1 automatically returns to the A position, and when the seat cushion part 4 is flipped down and reset, the seat cushion part 4 pushes the lock buckle body 1 from the A position to and limits it at the C position, so that the seat belt buckle automatically moves between the C position and the A position according to the movement of the seat cushion part 4, and there is no need to manually operate the lock buckle position, which is convenient for passengers to use.

[0060] Since the movable angles of the second arm and the third arm are respectively approximately 50 degrees, the second arm and the third arm are within the tolerable movable range, avoiding the risk of a single torsion arm breaking due to excessive movable angles, thereby improving the service life of the bidirectional spring.

[0061] like Figure 1-3 As shown, in a preferred embodiment of the present invention, the center of the arc hole 241 is the same as the rotation center of the connecting rod 24, so that the connecting rod 24 and the second arm 233 can exert a torque on each other at the rotation center of the connecting rod 24, and the connecting rod 24 and the third arm 234 can exert a torque on each other at the rotation center of the connecting rod 24, thereby achieving smooth rotation of the connecting rod 24, avoiding jamming, and improving the service life of the bidirectional spring.

[0062] like Figure 1-3 As shown, in a preferred embodiment of the present invention, the first arm 232 includes a first branch arm 2321 and a second branch arm 2322 .

[0063] The first arm 2321 and the second arm 2322 are formed to extend tangentially from both radial ends of the spiral portion 231 and toward the base 21 . The first arm 2321 and the second arm 2322 are both connected to the base 21 to prevent the spiral portion 231 from rotating with the second arm 233 or the third arm 234 .

[0064] like Figure 1-3 As shown, in a preferred embodiment of the present invention, the first arm 2321 and the second arm 2322 are connected and together form a U-shape with the opening facing away from the base, and the first arm 2321 and the second arm 2322 are respectively located on both radial sides of the mounting shaft 22, thereby enhancing the torsional structural strength of the first arm 232 and improving its service life.

[0065] like Figure 1-3 As shown, in a preferred embodiment of the present invention, the second arm 233 extends tangentially from one axial end of the spiral portion 231, the third arm 234 extends tangentially from the other axial end of the spiral portion 231, and the second arm 233 and the third arm 234 are respectively located at the radial ends of the spiral portion 231 in the radial direction, and the radial ends of the spiral portion 231 are respectively facing the C position and the B position, so that the second arm 233 can move between the two extreme positions of the A position and the B position, and the third arm 234 can move between the two extreme positions of the A position and the C position.

[0066] like Figure 1-3 As shown, in a preferred embodiment of the present invention, the second arm 233 is bent to form a first bent arm 2331 parallel to the axial direction of the spiral portion 231 , and the third arm 234 is bent to form a second bent arm 2341 parallel to the first bent arm 2331 .

[0067] When the lock body 1 is located at position C, the second bending arm 2341 abuts against the hole wall of the arc hole 241 at one end close to position B, so that the third arm 234 applies torque to each other through the second bending arm 2341 and the connecting rod 24 .

[0068] When the lock body 1 is located at position B, the first bending arm 2331 abuts against the hole wall of the arc hole 241 at one end close to position C, so that the second arm 233 and the connecting rod 24 apply torque to each other through the first bending arm 2331 .

[0069] When the lock body 1 is at position A, that is, when the connecting rod 24 is not subjected to external force, the second bending arm 2341 and the first bending arm 2331 respectively abut against the hole walls at both ends of the arc hole 241 to limit the lock body 1 at position A.

[0070] like Figure 1 As shown, in a preferred embodiment of the present invention, the base 21 is U-shaped, and both side walls of the base 21 are provided with a first mounting hole, one end of the connecting rod 24 is provided with a second mounting hole, and the mounting shaft 22 is passed through the first mounting hole and the second mounting hole to realize the movable installation of the connecting rod 24.

[0071] like Figure 1 As shown, in a preferred embodiment of the present invention, the spiral portion 231, the first arm 232, the second arm 233 and the third arm 234 are made by winding and bending the same steel wire, so as to improve the structural strength and elastic performance.

[0072] like Figure 1 As shown, in a preferred embodiment of the present invention, a third mounting hole 211 is formed on the bottom wall 212 of the base 21 , and the first arm 232 is inserted into the third mounting hole 211 , thereby realizing a convenient connection between the first arm 232 and the base 21 .

[0073] The third mounting hole 211 is in a strip shape, and its extending direction is perpendicular to the axial direction of the spiral portion 231 and the mounting shaft 22 . The length of the third mounting hole 211 matches the length between the first arm 2321 and the second arm 2322 .

[0074] Of course, the first arm 232 is not limited to being plugged into the base 21. For example, the first arm 232 can also be detachably connected to the base 21 by screws or welded thereto. Those skilled in the art can select the connection method between the first arm 232 and the base according to actual needs.

[0075] The present invention also provides a vehicle, comprising a vehicle body, a seat and the above-mentioned safety belt buckle.

[0076] The seat and the base 21 are respectively arranged on the floor in the vehicle body, and the base 21 is located on one side of the seat, and a preset installation angle is designed for the base 21, for example, Fig. 9 As shown, the preset installation angle is 13-23 degrees between the bottom wall 212 of the base 21 and the horizontal plane H2. At this angle, when the lock body 1 is in position A, the backrest 3 can push the lock body 1 to move and can only move in direction B. The seat includes a backrest 3 and a cushion 4. The cushion 4 abuts against the lock body 1 and limits the connecting rod 24 to position C. When the cushion 4 is flipped up, it is separated from the lock body 1. The third arm 234 drives the lock body 1 to reset from position C to position A. When the backrest 3 is flipped down, it presses down the upper end of the first side 11 of the lock body 1 and drives the connecting rod 24 to move from position A to position B, so that the lock body 1 and the backrest 3 follow each other to avoid limiting the backrest.

[0077] Preferably, the abutting portion between the backrest portion 3 and the lock body 1 is a rounded structure, so that the backrest portion 3 can move smoothly without obstruction when abutting against the upper end of the lock body 1 .

[0078] like Figure 8 As shown, a guide surface 41 facing the lock body 1 is provided on one side of the cushion portion 4. When the cushion portion 4 is flipped down to reset, the guide surface 41 abuts against the upper end of the second side 12 of the lock body 1 opposite to the first side 11 and guides the lock body 1 from position A to position C.

[0079] The vehicle of the present invention adopts the above-mentioned seat belt buckle, which reduces the displacement of the human body caused by a collision, reduces the risk of the human body diving and slipping out due to a collision, and thus improves safety; and automatically adjusts the position of the buckle body 1 according to the movement of the seat cushion part 4, without the need for manual operation of the seat belt buckle position, which is convenient for passengers to use.

[0080] like Figure 8 As shown, in a preferred embodiment of the present invention, the guide surface 41 includes a rounded surface 411, an arcuate surface 412 and a flat surface 413, the cushion portion 4 has a first side close to the backrest portion 3 and a second side away from the backrest portion 3, the rounded surface 411 protrudes obliquely downward toward the first side of the cushion portion 4, the arcuate surface 412 protrudes toward the second side of the cushion portion 4, the flat surface 413 extends along the thickness direction of the cushion portion 4, the rounded surface 411, the arcuate surface 412 and the flat surface 413 are connected in sequence from bottom to top, and the rounded transition is formed.

[0081] When the cushion portion 4 is pressed downward and the rounded surface 411 abuts against the upper end angle of the second side 12 of the lock body 1, the rounded surface 411 guides the lock body 1 toward the C position, so that the lock body 1 is cut into the arc surface 412;

[0082] Due to the action force of the third arm 234, the second side 12 of the lock body 1 is pressed against the arc surface 412, and the arc surface 412 continues to guide the lock body 1 toward the C position; when the lock body 1 reaches the C position, the cushion part 4 flips down into place, and the flat surface 413 abuts against the second side 12 of the lock body 1, thereby limiting the lock body 1 at the C position.

[0083] For example, Fig. 9 As shown, when the lock body 1 is in position C, the angle between the center line E1 of the connecting rod 24 and the horizontal plane H1 is 80-110 degrees; when the lock body 1 is in position A, the angle between the center line E1 of the connecting rod 24 and the horizontal plane H1 is 45-70 degrees; when the lock body 1 is in position B, the angle between the center line E1 of the connecting rod 24 and the horizontal plane H1 is 0-15 degrees.

[0084] In the embodiments of the present invention, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The terms "installation", "connection", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0085] In the description of the embodiments of the present invention, it needs to be understood that the directions or positional relationships indicated by the terms "upper" and "lower" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the embodiments of the present invention.

[0086] In the description of this specification, the description of the terms "one embodiment", "a preferred embodiment", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0087] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A seat belt buckle, characterized in that: include: Lock body (1), A mounting seat assembly (2), the mounting seat assembly (2) comprising a base (21), a mounting shaft (22), a bidirectional spring (23) and a connecting rod (24), the connecting rod (24) being movably mounted on the base (21) via the mounting shaft (22), the connecting rod (24) being provided with an arc-shaped hole (241), the lock body (1) being mounted on the connecting rod (24), the bidirectional spring (23) having a spiral portion (231), the spiral portion (231) being sleeved on the mounting shaft (22), the spiral portion (231) extending with a first arm (232), the first arm (232) being connected to the base (21), the spiral portion (231) also extending with a second arm (233) and a third arm (234), the second arm (233) and the third arm (234) both extend into the arc-shaped hole (241), when the lock body (1) is located at the C position, the third arm (234) abuts against the hole wall at one end of the arc-shaped hole (241), when the lock body (1) is located at the B position, the second arm (233) abuts against the hole wall at the other end of the arc-shaped hole (241), the second arm (233) is configured to drive the lock body (1) to return from the B position to the A position, and the third arm (234) is configured to drive the lock body (1) to return from the C position to the A position, and the A position is located between the B position and the C position.

2. The seat belt buckle according to claim 1, characterized in that: The first arm (232) comprises a first support arm (2321) and a second support arm (2322), wherein the first support arm (2321) and the second support arm (2322) are formed by extending from two radial ends of the spiral portion (231) along a tangential direction and toward the base (21).

3. The seat belt buckle according to claim 2, characterized in that: The first support arm (2321) and the second support arm (2322) are connected and together form a U shape with the opening facing away from the base (21), and the first support arm (2321) and the second support arm (2322) are respectively located on both sides of the installation shaft (22).

4. The seat belt buckle according to claim 1, characterized in that: The second arm (233) extends tangentially from one axial end of the spiral portion (231), and the third arm (234) extends tangentially from the other axial end of the spiral portion (231), and the second arm (233) and the third arm (234) are respectively located at two radial ends of the spiral portion (231).

5. The seat belt buckle according to claim 1, characterized in that: The second arm (233) is bent to form a first bent arm (2331) parallel to the axial direction of the spiral portion (231); the third arm (234) is bent to form a second bent arm (2341) parallel to the first bent arm (2331); when the lock body (1) is located at the C position, the second bent arm (2341) abuts against the hole wall at one end of the arc-shaped hole (241); when the lock body (1) is located at the B position, the first bent arm (2331) abuts against the hole wall at the other end of the arc-shaped hole (241).

6. The seat belt buckle according to claim 1, characterized in that: The base (21) is U-shaped, and both side walls of the base (21) are provided with first mounting holes, one end of the connecting rod (24) is provided with a second mounting hole, the mounting shaft (22) is inserted into the first mounting hole and the second mounting hole, the bottom wall of the base (21) is provided with a third mounting hole (211), and the first arm (232) is inserted into the third mounting hole (211).

7. The seat belt buckle according to claim 1, characterized in that: The center of the arc-shaped hole (241) and the rotation center of the connecting rod (24) are the same center.

8. A vehicle, characterized in that: The invention comprises a vehicle body, a seat and a seat belt buckle as claimed in any one of claims 1 to 7, wherein the seat and the base (21) are respectively arranged on the floor in the vehicle body, and the base (21) is located on one side of the seat, and the seat comprises a backrest portion (3) and a cushion portion (4), the cushion portion (4) abuts against the buckle body (1) and limits the connecting rod (24) to the C position, and the cushion portion (4) is separated from the buckle body (1) when it is flipped up, and the third arm (234) drives the connecting rod (24) to return from the C position to the A position, and when the backrest portion (3) is flipped down, it presses down the first side (11) of the buckle body (1) and drives the connecting rod (24) to move from the A position to the B position.

9. The vehicle according to claim 8, characterized in that A guide surface (41) facing the lock body (1) is provided on one side of the cushion portion (4); when the cushion portion (4) is flipped down to reset, the guide surface (41) abuts against the second side (12) of the lock body (1) and guides the lock body (1) from position A to position C.

10. The vehicle according to claim 9, characterized in that The guide surface (41) comprises a rounded surface (411), an arcuate surface (412) and a straight surface (413); the cushion portion (4) has a first side close to the backrest portion (3) and a second side away from the backrest portion (3); the rounded surface (411) protrudes obliquely downward toward the first side of the cushion portion (4); the arcuate surface (412) protrudes toward the second side of the cushion portion (4); the straight surface (413) extends along the thickness direction of the cushion portion (4); and the rounded surface (411), the arcuate surface (412) and the straight surface (413) are connected in sequence from bottom to top.

Images