Safety belt lock catch

Abstract

The invention provides a safety belt lock catch which comprises a lock cover, a lock catch plate, a connector, a fixing base, a spring and a lock catch switch, the lock catch plate and the connector are installed in the lock cover, the fixing base is installed on the lower portion of the lock catch plate in the first direction, and the first direction is the direction in which the connector is inserted into the lock catch plate. The lock catch switch is contained in the middle of the lock catch plate in a sliding mode in the first direction. And the spring is connected between the lock catch switch and the fixed seat. The locking device comprises a limiting structure, a locking block, a torsional spring assembly and an unlocking assembly. The locking block is installed in a limiting sliding groove in the upper portion of the lock catch plate in a sliding mode in the second direction, and the locking block can be clamped to the clamping groove of the connector in the second direction. The second direction is perpendicular to the first direction. The torsional spring assembly is arranged on the lock catch plate, connected with the locking block and used for providing locking pushing force for the locking block. The limiting structure is arranged on the lock cover, and the locking block is limited in the limiting structure so as to limit the freedom degree of the locking block in the thickness direction of the lock catch plate. The unlocking assembly is arranged between the lock cover and the locking block and used for unlocking the locking block.

Description

Technical Field

[0001] The present application relates to the field of automobile safety technology, and in particular to a seat belt buckle. Background Art

[0002] With the increasing popularity of automobiles, car safety has become a concern for users. Existing seatbelt buckles effectively ensure safety. Generally, when fastening a seatbelt, the occupant, while seated, pulls the belt around the user's body, inserts the belt into the buckle device on the opposite side of the belt's mounting, and secures the belt to prevent it from unfastening. Existing buckles are bulky, and most notably, the button is externally mounted on the buckle housing. This can cause the button to be frequently touched or pressed, causing the belt to unlock, thus failing to ensure occupant safety. Summary of the Invention

[0003] The present application provides a seat belt buckle to solve the problems that the existing buckle is large in size and the button of the existing buckle is externally located on the outside of the buckle shell. In this way, the button will often be touched or pressed, causing the seat belt to be unlocked, and the safety of the occupant cannot be guaranteed.

[0004] The present application provides a seat belt buckle, comprising: a lock cover, a lock plate and a connector mounted in the lock cover, a fixing seat, a spring, and a lock switch, wherein the fixing seat is mounted on the lower portion of the lock plate along a first direction, the first direction being the direction in which the connector is inserted into the lock plate; the lock switch is slidably accommodated in the middle portion of the lock plate along the first direction; the spring is connected between the lock switch and the fixing seat to provide a restoring elastic force for the lock switch; and further comprising: a limiting structure, a locking block, a torsion spring assembly, and an unlocking assembly.

[0005] The locking block is slidably mounted in the limiting sliding groove on the upper portion of the locking plate along a second direction, and the locking block can be engaged with the slot of the connector in the second direction; the second direction is perpendicular to the first direction;

[0006] The torsion spring assembly is arranged on the locking plate and connected to the locking block, and is used to provide a locking pushing force to the locking block;

[0007] The limiting structure is provided on the locking cover, and the locking block is limited in the limiting structure to limit the degree of freedom of the locking block in the thickness direction of the locking plate;

[0008] The unlocking assembly is arranged between the lock cover and the locking block, and is used to unlock the locking block;

[0009] When in the unlocked state, the lock switch abuts against the locking block under the support of the spring, and limits the locking block to the initial position of the limiting slide groove relative to the lock plate; when in the locked state, the lock switch is pushed to the side close to the fixing seat when the connector is inserted along the first direction, and at the same time, the lock switch releases the limit on the locking block, and the locking block is clamped in the slot of the connector under the push of the torsion spring assembly to lock the connector.

[0010] Optionally, the locking block includes a limiting groove; in the thickness direction of the locking plate, both ends of the locking block protrude from the limiting sliding groove, and the limiting grooves are respectively arranged at both ends of the locking block.

[0011] Optionally, the torsion spring assembly includes: a torsion spring, a positioning hole and a connecting support member;

[0012] The positioning hole is provided on the locking plate along the thickness direction of the locking plate;

[0013] The connecting supports are inserted into the positioning holes and are distributed on both sides of the locking plate;

[0014] One end of the torsion spring is fixedly connected to the connecting support, and the other end of the torsion spring is connected to the limiting groove of the locking block to provide a locking pushing force to the locking block; at the same time, the torsion spring can limit the freedom of the locking block in the thickness direction of the locking plate.

[0015] Optionally, the connecting support member includes at least one of the following structures: a bolt, a support column and a connecting rod.

[0016] Optionally, the locking cover includes an upper box cover and a lower box cover; the limiting structure is arranged on the upper box cover and the lower box cover, and the limiting structure includes a limiting slot, which is opposite to the locking block and can be clamped with the locking block.

[0017] Optionally, the unlocking assembly includes an unlocking hole and an unlocking rod;

[0018] The unlocking hole is provided on one side of the lock cover, and the hole direction of the unlocking hole is opposite to the locking block;

[0019] The unlocking rod is inserted into the unlocking hole and can abut against the locking block to release the locking of the joint by the locking block.

[0020] Optionally, the number of the unlocking holes is two, and each of the unlocking holes is opposite to one end of the locking block;

[0021] Correspondingly, the unlocking rods are provided in two numbers.

[0022] Optionally, the unlocking assembly further includes: an unlocking handle, which is connected to one end of the unlocking rod opposite to the locking block, and is used to hold the unlocking handle to control the unlocking rod to be inserted into the unlocking hole and then abut against the locking block.

[0023] Optionally, the locking plate includes an integrally formed main body and a connecting handle, the main body is in a U-shaped structure, a slide is provided inside the U-shaped main body, and a limiting hook is provided below the main body;

[0024] The lock switch is accommodated in the slideway, and the fixing seat is mounted in the limit hook.

[0025] Optionally, the locking cover further includes a socket, which is arranged on a side where the connector is inserted into the locking cover, and the socket is used to insert the connector.

[0026] Compared with the prior art, this application has the following advantages:

[0027] The present application provides a seat belt buckle, comprising: a locking cover, a locking plate mounted within the locking cover, a connector, a fixing seat, a spring, and a locking switch. The fixing seat is mounted on the lower portion of the locking plate in a first direction, which is the direction in which the connector is inserted into the locking plate. The locking switch is slidably accommodated in the middle portion of the locking plate in the first direction. The spring is connected between the locking switch and the fixing seat and provides a return force for the locking switch. The buckle also comprises a retaining structure, a locking block, a torsion spring assembly, and an unlocking assembly. The locking block is slidably mounted within a retaining groove in the upper portion of the locking plate in a second direction and can engage with the connector's retaining groove in the second direction. The second direction is perpendicular to the first direction. The torsion spring assembly is disposed on the locking plate and connected to the locking block to provide a locking force to the locking block. The retaining structure is disposed on the locking cover, and the locking block is retained within the retaining structure to limit its freedom of movement in the thickness direction of the locking plate. The unlocking assembly is disposed between the locking cover and the locking block and is used to unlock the locking block. In the unlocked state, the lock switch, supported by the spring, abuts against the locking block and limits the locking block to its initial position relative to the limiting groove of the lock plate. In the locked state, the lock switch is pushed to the side close to the fixing seat when the connector is inserted in the first direction. At the same time, the lock switch releases the locking block, and the locking block is pushed by the torsion spring assembly to engage the locking groove of the connector, thereby locking the connector.

[0028] It can be understood that the seatbelt buckle provided by this application integrates the fixing base, spring, buckle switch, limiting structure, locking block, and torsion spring assembly into the lock cover, reducing the size of the seatbelt buckle. Secondly, the torsion spring assembly provides the locking force for the locking block, and the torsion spring assembly can also limit the locking block, allowing the locking block to lock the joint while also stabilizing the locking block, thereby improving the stability of the structural connection. Furthermore, the unlocking assembly is located between the lock cover and the locking block, and unlocking is achieved through the independent unlocking assembly, thereby ensuring the safety of the occupant. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural schematic diagram of a seat belt buckle provided in an embodiment of the present application.

[0030] Figure 2 This is a structural schematic diagram of a locking cover provided in an embodiment of the present application.

[0031] Figure 3 It is an exploded view of the seat belt buckle provided in an embodiment of the present application.

[0032] Figure 4 Schematic diagram of the structure of a partial structure of a seat belt buckle provided in an embodiment of the present application.

[0033] Figure 5 It is a structural schematic diagram of the locking block provided in an embodiment of the present application.

[0034] Figure 6 Schematic diagram of the structure of the seat belt buckle in the initial state provided by an embodiment of the present application.

[0035] Figure 7 Schematic diagram of the structure of the seat belt buckle in the locked state provided by an embodiment of the present application.

[0036] Figure 8 It is a structural schematic diagram of the torsion spring assembly provided in an embodiment of the present application connected to the locking block.

[0037] Reference numerals:

[0038] Lock cover 1, upper box cover 11, lower box cover 12, socket 13, limiting structure 14, lock plate 2, main body 21, connecting handle 22, limiting slide 23, limiting hook 24, joint 3, fixing seat 4, column structure 41, spring 5, lock switch 6, locking block 7, limiting groove 71, torsion spring assembly 8, torsion spring 81, positioning hole 82, connecting support 83, unlocking assembly 9, unlocking hole 91, unlocking rod 92, DETAILED DESCRIPTION

[0039] The following description sets forth many specific details to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the scope of the present application. Therefore, the present application is not limited to the specific implementations disclosed below.

[0040] In the description of this application, it should be understood that the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0042] With the increasing popularity of automobiles, car safety has become a concern for users. Existing seatbelt buckles effectively ensure safety. Generally, when fastening a seatbelt, the occupant, while seated, pulls the belt around the user's body, inserts the belt into the buckle device on the opposite side of the belt's mounting, and secures the belt to prevent it from unfastening. Existing buckles are bulky, and most notably, the button is externally mounted on the buckle housing. This can cause the button to be frequently touched or pressed, causing the belt to unlock, thus failing to ensure occupant safety.

[0043] Based on this, the present application provides a seat belt buckle, comprising: a locking cover, a striker plate mounted within the lock cover, a connector, a fixing seat, a spring, and a striker switch. The fixing seat is mounted on the lower portion of the striker plate along a first direction, the first direction being the direction in which the connector inserts into the striker plate. The striker switch is slidably accommodated in the middle portion of the striker plate along the first direction. The spring is connected between the striker switch and the fixing seat and provides a return force for the striker switch. The buckle also comprises: a retaining structure, a locking block, a torsion spring assembly, and an unlocking assembly. The locking block is slidably mounted within a retaining groove in the upper portion of the striker plate along a second direction, and can engage with the connector's retaining groove in the second direction. The second direction is perpendicular to the first direction. The torsion spring assembly is disposed on the striker plate and connected to the locking block to provide a locking force to the locking block. The retaining structure is disposed on the lock cover, and the locking block is retained within the retaining structure to limit its freedom of movement in the thickness direction of the striker plate. An unlocking assembly is disposed between the lock cover and the locking block and is used to unlock the locking block. In the unlocked state, the lock switch, supported by the spring, abuts the locking block and retains the locking block in its initial position relative to the retaining groove of the lock plate. In the locked state, the lock switch is pushed toward the side of the fixing seat when the connector is inserted in the first direction. Simultaneously, the lock switch releases the retaining force on the locking block, and the locking block, pushed by the torsion spring assembly, engages the connector's retaining groove, locking the connector.

[0044] It can be understood that the seatbelt buckle provided by this application integrates the fixing base, spring, buckle switch, limiting structure, locking block, and torsion spring assembly into the lock cover, reducing the size of the seatbelt buckle. Secondly, the torsion spring assembly provides the locking force for the locking block, and the torsion spring assembly can also limit the locking block, allowing the locking block to lock the joint while also stabilizing the locking block, thereby improving the stability of the structural connection. Furthermore, the unlocking assembly is located between the lock cover and the locking block, and unlocking is achieved through the independent unlocking assembly, thereby ensuring the safety of the occupant.

[0045] Next, the sealing assembly provided by the present application will be described in detail with reference to the accompanying drawings. Figure 1 This is a structural schematic diagram of a seat belt buckle provided in an embodiment of the present application. Figure 2 This is a structural schematic diagram of a locking cover provided in an embodiment of the present application. Figure 3 It is an exploded view of the seat belt buckle provided in an embodiment of the present application. Figure 4 Schematic diagram of the structure of a partial structure of a seat belt buckle provided in an embodiment of the present application. Figure 5 It is a structural schematic diagram of the locking block provided in an embodiment of the present application. Figure 6 Schematic diagram of the structure of the seat belt buckle in the initial state provided by an embodiment of the present application. Figure 7 Schematic diagram of the structure of the seat belt buckle in the locked state provided by an embodiment of the present application. Figure 8It is a structural schematic diagram of the torsion spring assembly provided in an embodiment of the present application connected to the locking block.

[0046] like Figures 1 to 8 As shown, the present application provides a seat belt buckle, comprising: a lock cover 1, a strike plate 2 mounted within the lock cover 1, a connector 3, a fixing base 4, a spring 5, and a strike switch 6. The fixing base 4 is mounted below the strike plate 2 along a first direction, which is the direction in which the connector 3 is inserted into the strike plate 2. The strike switch 6 is slidably accommodated in the middle portion of the strike plate 2 along the first direction. The spring 5 is connected between the strike switch 6 and the fixing base 4 and is used to provide a return force for the strike switch 6. The buckle also includes: a limiting structure 14, a locking block 7, a torsion spring assembly 8, and an unlocking assembly 9. The locking block 7 is slidably mounted within a limiting groove 23 on the upper portion of the strike plate 2 along a second direction. The locking block 7 can engage with the slot of the connector 3 in the second direction. The second direction is perpendicular to the first direction. The torsion spring assembly 8 is disposed on the strike plate 2 and connected to the locking block 7 to provide a locking force to the locking block 7. A limiting structure 14 is provided on the lock cover 1, and the locking block 7 is limited in the limiting structure 14 to limit the degree of freedom of the locking block 7 in the thickness direction of the lock plate 2. An unlocking assembly 9 is provided between the lock cover 1 and the locking block 7 to unlock the locking block 7. In the unlocked state, the lock switch 6 abuts against the locking block 7 under the support of the spring 5, and limits the locking block 7 to the initial position of the limiting groove 23 relative to the lock plate 2. In the locked state, the lock switch 6 is pushed to the side close to the fixing seat 4 when the connector 3 is inserted along the first direction. At the same time, the lock switch 6 releases the limit on the locking block 7. The locking block 7 is clamped in the slot of the connector 3 under the push of the torsion spring assembly 8 to lock the connector 3.

[0047] Specifically, in this embodiment, the lock cover 1 includes an upper cover 11, a lower cover 12, and a socket 13, wherein the upper cover 11 and the lower cover 12 are buckled together to form the lock cover 1. The socket 13 is provided on one side of the lock cover 1, which is the side where the connector 3 is inserted into the lock cover 1, and the socket 13 is used to insert the connector 3. In one example, the socket 13 is formed by the upper cover 11 and the lower cover 12 being combined with each other, that is, the upper cover 11 and the lower cover 12 are each provided with half of the socket 13. When the upper cover 11 and the lower cover 12 are buckled together, the half sockets 13 of the upper cover 11 and the lower cover 12 are respectively combined to form the entire socket 13.

[0048] In one example, the upper box cover 11 and the lower box cover 12 are respectively provided with screw structures, and the upper box cover 11 and the lower box cover 12 are assembled together by the screw structure. The screw structure includes screws and internal threads provided on the upper box cover 11 and the lower box cover 12. The screw structure is correspondingly provided at the edge of the upper box cover 11 and the lower box cover 12. The screw structure can be one or more. The specific number can be set according to actual needs and is not specifically limited here. Of course, the upper box cover 11 and the lower box cover 12 are also provided with a buckle angle structure, which can cooperate with the screw structure to complete the assembly of the upper box cover 11 and the lower box cover 12. Similarly, the buckle angle structure can also be used alone to complete the assembly of the upper box cover 11 and the lower box cover 12.

[0049] In one example, a limiting structure 14 is provided on the lock cover 1, and the locking block 7 is limited in the limiting structure 14 to limit the degree of freedom of the locking block 7 in the thickness direction of the lock plate 2. Specifically, the limiting structure 14 is provided on the upper box cover 11 and the lower box cover 12, and the upper box cover 11 and the lower box cover 12 are respectively provided with a first limiting structure 14 and a second limiting structure 14. On the upper box cover 11 and the lower box cover 12, the first limiting structure 14 and the second limiting structure 14 are docked to form the limiting structure 14. The limiting structure 14 includes a limiting card slot, which is opposite to the locking block 7 and can be clamped to the locking block 7. In one example, the limiting card slot accommodates both ends of the locking block 7 to limit the degree of freedom of the locking block 7 in the thickness direction of the lock plate 2.

[0050] In this embodiment, after the connector 3 is inserted into the latch, it enters the locking plate 2. In one example, the locking plate 2 includes an integrally formed main body 21 and a connecting handle 22. The main body 21 has a U-shaped structure and includes an open space and a limiting slide 23. The opening of the open space corresponds to the socket 13. After the connector 3 is inserted into the socket 13 of the lock cover 1, it is inserted through the opening into the open space. The limiting slide 23 is respectively provided on two opposing walls of the main body 21. Specifically, in one example, the open space is provided in a U-shaped structure. A fixing plate is provided on the side of the opening of the open space to fix the size of the U-shaped opening of the open space. The limiting slide 23 is respectively provided on two opposing walls of the U-shaped structure. In one example, the limiting slide 23 has an inclination, and the lock can slide along the limiting slide 23. In one example, based on the U-shaped structure of the main body 21, in addition to the two opposing walls (straight walls) of the U-shaped structure, the U-shaped structure also includes a curved wall integrally connected to the two side walls.

[0051] It should be noted that when the connector 3 is not inserted into the opening space, the locking block 7 is located at the bottom end of the limiting slide groove 23 . After the connector 3 is inserted into the opening space, the locking block 7 is located at the high end of the limiting slide groove 23 .

[0052] In one example, a slide is provided inside the main body 21 having a U-shaped structure, and a limit hook 24 is provided below the main body 21, wherein the slide is provided on the inner side of two oppositely arranged side walls, and the slide is provided on the inner side of two side walls provided along the first direction, and the lock switch 6 is accommodated in the slide and can slide along the slide. The limit hook 24 is provided below the main body 21, and specifically below one of the side walls. The connecting handle 22 is connected to the bottom of the other side wall. The width of the hook body of the limit hook 24 is adapted to the width of the fixing seat 4, and the fixing seat 4 is provided with a snap-in groove at the opposite ends in the second direction. The hook body of the limit hook 24 can be snap-fitted with the snap-in groove of the fixing seat 4, thereby snapping the fixing seat 4 into the limit hook 24.

[0053] The lock switch 6 slides along the first direction and is accommodated in the slideway of the lock plate 2. In one example, the lock switch 6 includes an integrally formed positioning boss, a spring 5 boss, a limiting boss and a contact block. The contact block is arranged on the side facing the socket 13 of the lock cover 1, and abuts against the locking block 7 when sliding to a specified position along the slideway. In one example, the contact block is pointed, and the end face close to the locking block 7 is set as an inclined end face, which contacts the locking block 7. The spring 5 boss is arranged on the side opposite to the contact block, and the spring 5 boss is used to connect one end of the spring 5. The positioning bosses are respectively arranged on the sides of the spring 5 boss, and the lock switch 6 moves along the spring 5 boss through the positioning boss. The limiting boss is arranged on the side of the contact block to prevent the lock switch 6 from disengaging from the slideway when moving.

[0054] To facilitate the movement of the lock switch 6, the fixing base 4 is mounted on the lower portion of the lock plate 2 along a first direction. The spring 5 is connected between the lock switch 6 and the fixing base 4 to provide a resilient force for the lock switch 6. In one example, the fixing base 4 has an overall U-shaped structure. Specifically, the U-shaped fixing base 4 includes an integrally formed vertical wall and a horizontal wall, wherein the vertical walls are arranged relative to each other in a second direction and are provided with a snap-fitting groove. A fixing groove is provided on one edge of the horizontal wall. The fixing groove can snap-fit ​​with a protrusion provided on the limiting hook 24. When the snap-fitting groove and the limiting hook 24 are snap-fitted in the thickness direction of the lock plate 2, the fixing groove snaps into engagement with the protrusion provided on the limiting hook 24, thereby limiting the freedom of the fixing base 4 relative to the lock plate 2 in the thickness direction of the lock plate 2 (specifically, the freedom toward the upper cover 11). The thickness direction of the lock plate 2 refers to the direction in which the upper cover 11 and the lower cover 12 are connected. The freedom of the fixing base 4 relative to the locking plate 2 on the side facing the lower cover 12 is limited by the connecting handle 22. A columnar structure 41 is provided in the middle of the horizontal wall, with one end of the spring 5 mounted on this columnar structure 41. The spring 5 is connected between the locking switch 6 and the fixing base 4. When the connector 3 is not inserted into the opening, the spring 5 is in a free state. When the connector 3 is inserted into the opening, the spring 5 is compressed, and the elastic force generated by the spring 5 is directed toward the socket 13.

[0055] After the connector 3 is inserted into the locking plate 2, it needs to be locked by the locking block 7. In this embodiment, the locking block 7 is slidably installed in the limiting groove 23 on the upper portion of the locking plate 2 along the second direction. The locking block 7 can be engaged with the groove of the connector 3 in the second direction. The second direction is perpendicular to the first direction. Specifically, the locking block 7 includes a limiting groove 71. In the thickness direction of the locking plate 2, the two ends of the locking block 7 protrude from the limiting groove 23, and the limiting grooves 71 are respectively provided at the two ends of the locking block 7.

[0056] The torsion spring assembly 8 is provided on the lock plate 2 and is connected to the locking block 7 to provide a locking pushing force to the locking block 7. In this embodiment, the torsion spring assembly 8 includes: a torsion spring 81, a positioning hole 82 and a connecting support 83. Among them, the positioning hole 82 is provided on the lock plate 2 along the thickness direction of the lock plate 2, and the connecting support 83 is inserted into the positioning hole 82 and is distributed on both sides of the lock plate 2. In one example, the connecting support 83 includes at least one of the following structures: a bolt, a support column and a connecting rod. One end of the torsion spring 81 is fixedly connected to the connecting support 83, and the other end of the torsion spring 81 is connected to the limiting groove 71 of the locking block 7 to provide a locking pushing force to the locking block 7. At the same time, the torsion spring 81 can limit the degree of freedom of the locking block 7 in the thickness direction of the lock plate 2. Furthermore, in one example, the torsion spring 81 has an overall U-shaped structure, and the opposite ends of the U-shaped torsion spring 81 are configured as hooks to respectively connect with the limiting grooves 71 at both ends of the locking block 7. When the limiting grooves 71 are respectively connected with the limiting grooves 71 at both ends of the locking block 7, the degree of freedom of the locking block 7 in the thickness direction of the locking plate 2 can also be limited.

[0057] After locking the connector 3, it is necessary to unlock the connector 3 using the unlocking assembly 9. Specifically, the unlocking assembly 9 is disposed between the locking cover 1 and the locking block 7 to unlock the locking block 7. In one example, the unlocking assembly 9 includes an unlocking hole 91 and an unlocking rod 92. The unlocking hole 91 is disposed on one side of the locking cover 1, with the hole of the unlocking hole 91 facing the locking block 7. The unlocking rod 92 is inserted into the unlocking hole 91 and can abut against the locking block 7 to release the locking block 7 from locking the connector 3. Furthermore, in one example, there are two unlocking holes 91, each of which faces one end of the locking block 7. Accordingly, there are two unlocking rods 92. During unlocking, each unlocking rod 92 is inserted into each unlocking hole 91, with one end of each unlocking rod 92 abutting against each end of the locking block 7. Under the force of the unlocking rod 92, the locking block 7 is pushed to the initial position of the limiting groove 23 of the locking plate 2.

[0058] In one example, the unlocking assembly 9 also includes an unlocking handle, which is connected to one end of the unlocking rod 92 opposite to the locking block 7 and is used to hold the unlocking handle to control the unlocking rod 92 to be inserted into the unlocking hole 91 and then abut against the locking block 7.

[0059] The present application provides a seat belt buckle, comprising: a lock cover 1, a lock plate 2 mounted in the lock cover 1, a connector 3, a fixing seat 4, a spring 5, and a lock switch 6. The fixing seat 4 is mounted on the lower portion of the lock plate 2 along a first direction, the first direction being the direction in which the connector 3 is inserted into the lock plate 2. The lock switch 6 is slidably accommodated in the middle portion of the lock plate 2 along the first direction. The spring 5 is connected between the lock switch 6 and the fixing seat 4 and is used to provide a reset force for the lock switch 6. The buckle also includes: a limiting structure 14, a locking block 7, a torsion spring assembly 8, and an unlocking assembly 9. The locking block 7 is slidably mounted in a limiting groove 23 on the upper portion of the lock plate 2 along a second direction. The locking block 7 can be engaged with the locking groove of the connector 3 in the second direction. The second direction is perpendicular to the first direction. The torsion spring assembly 8 is disposed on the lock plate 2 and connected to the locking block 7 to provide a locking force to the locking block 7. A limiting structure 14 is provided on the lock cover 1, and the locking block 7 is limited in the limiting structure 14 to limit the degree of freedom of the locking block 7 in the thickness direction of the lock plate 2. An unlocking assembly 9 is provided between the lock cover 1 and the locking block 7 to unlock the locking block 7. In the unlocked state, the lock switch 6 abuts against the locking block 7 under the support of the spring 5, and limits the locking block 7 to the initial position of the limiting groove 23 relative to the lock plate 2. In the locked state, the lock switch 6 is pushed to the side close to the fixing seat 4 when the connector 3 is inserted along the first direction. At the same time, the lock switch 6 releases the limit on the locking block 7. The locking block 7 is clamped in the slot of the connector 3 under the push of the torsion spring assembly 8 to lock the connector 3.

[0060] It can be understood that the seat belt buckle provided by this application integrates the fixing seat 4, spring 5, lock switch 6, limiting structure 14, locking block 7, and torsion spring assembly 8 into the lock cover 1, making the seat belt buckle smaller. Secondly, the torsion spring assembly 8 provides the locking driving force for the locking block 7, and the torsion spring assembly 8 can also measure the position of the locking block 7, allowing the locking block 7 to lock the joint 3 while also stabilizing the locking block 7, thereby improving the stability of the structural connection. In addition, the unlocking assembly 9 is located between the lock cover 1 and the locking block 7. Unlocking can only be achieved through the independent unlocking assembly 9, thereby ensuring the safety of the occupant.

[0061] It should be noted that although several structures, components, or units for realizing related functions are mentioned in the above detailed description, such division is not mandatory. In fact, depending on the specific implementation of the application, the features and functions of two or more structures, components, or units described above can be embodied in one structure, component, or unit. Conversely, the features and functions of one structure, component, or unit described above can be further divided into multiple components, structures, or units for embodiment.

[0062] Furthermore, although the components of the assembly or device of the present application and the arrangement of the components are depicted in a particular order in the drawings, this does not require or imply that the assembly or device must be designed in accordance with the particular components or arrangement of the components, or that all of the components shown must be included to achieve the desired results. Additionally or alternatively, certain components may be omitted, multiple components may be combined into one component to achieve corresponding functions, and / or one component may be decomposed into multiple components to achieve corresponding functions, etc.

[0063] Although the present application is disclosed as above with the preferred embodiments, it is not intended to limit the present application. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

Claims

1. A seat belt buckle, comprising: A lock cover and a lock plate and a connector, a fixing seat, a spring, and a lock switch installed in the lock cover, wherein the fixing seat is installed at the lower part of the lock plate along a first direction, the first direction being the direction in which the connector is inserted into the lock plate; the lock switch is slidably accommodated in the middle part of the lock plate along the first direction; the spring is connected between the lock switch and the fixing seat to provide a reset elastic force for the lock switch; and the lock cover further comprises: a limit structure, a locking block, a torsion spring assembly, and an unlocking assembly; The locking block is slidably mounted in the limiting sliding groove on the upper portion of the locking plate along a second direction, and the locking block can be engaged with the slot of the connector in the second direction; the second direction is perpendicular to the first direction; The torsion spring assembly is arranged on the locking plate and connected to the locking block, and is used to provide a locking pushing force to the locking block; The limiting structure is provided on the locking cover, and the locking block is limited in the limiting structure to limit the degree of freedom of the locking block in the thickness direction of the locking plate; The unlocking assembly is arranged between the locking cover and the locking block, and is used to unlock the locking block; When in the unlocked state, the lock switch abuts against the locking block under the support of the spring, and limits the locking block to the initial position of the limiting slide groove relative to the lock plate; when in the locked state, the lock switch is pushed to the side close to the fixing seat when the connector is inserted along the first direction, and at the same time, the lock switch releases the limit on the locking block, and the locking block is clamped in the slot of the connector under the push of the torsion spring assembly to lock the connector.

2. The seat belt buckle according to claim 1, characterized in that: The locking block includes a limiting groove; in the thickness direction of the locking plate, both ends of the locking block protrude from the limiting sliding groove, and the limiting grooves are respectively correspondingly arranged at both ends of the locking block.

3. The seat belt buckle according to claim 1, characterized in that: The torsion spring assembly comprises: a torsion spring, a positioning hole and a connecting support; The positioning hole is provided on the locking plate along the thickness direction of the locking plate; The connecting supports are inserted into the positioning holes and are distributed on both sides of the locking plate; One end of the torsion spring is fixedly connected to the connecting support, and the other end of the torsion spring is connected to the limiting groove of the locking block to provide a locking pushing force to the locking block; at the same time, the torsion spring can limit the freedom of the locking block in the thickness direction of the locking plate.

4. The seat belt buckle according to claim 3, characterized in that: The connecting support member includes at least one of the following structures: a bolt, a support column and a connecting rod.

5. The seat belt buckle according to claim 1, characterized in that: The locking cover includes an upper box cover and a lower box cover; the limiting structure is arranged on the upper box cover and the lower box cover, and the limiting structure includes a limiting card slot, which is opposite to the locking block and can be clamped with the locking block.

6. The seat belt buckle according to claim 1, characterized in that: The unlocking assembly includes an unlocking hole and an unlocking rod; The unlocking hole is provided on one side of the lock cover, and the hole direction of the unlocking hole is opposite to the locking block; The unlocking rod is inserted into the unlocking hole and can abut against the locking block to release the locking of the joint by the locking block.

7. The seat belt buckle according to claim 6, characterized in that: There are two unlocking holes, and each of the unlocking holes is opposite to one end of the locking block; Correspondingly, the unlocking rods are provided in two numbers.

8. The seat belt buckle according to claim 6, characterized in that: The unlocking assembly further includes an unlocking handle connected to one end of the unlocking rod opposite to the locking block, and used to hold the unlocking handle to control the unlocking rod to be inserted into the unlocking hole and then abut against the locking block.

9. The seat belt buckle according to claim 1, characterized in that: The locking plate includes an integrally formed main body and a connecting handle. The main body is in a U-shaped structure. A slide is provided inside the U-shaped main body, and a limiting hook is provided below the main body. The lock switch is accommodated in the slideway, and the fixing seat is mounted in the limit hook.

10. The seat belt buckle according to claim 1, characterized in that: The locking cover further comprises a socket, which is arranged on a side where the connector is inserted into the locking cover, and is used for inserting the connector into the socket.

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