Safety belt buckle with switch

Abstract

The present invention discloses a seat belt buckle with a switch, comprising a lock core assembly, an upper cover shell and a lower cover shell, wherein the upper cover shell and the lower cover shell are respectively located above and below the lock core assembly, and can be mutually engaged to form a cover body on the outside of the lock core assembly, wherein a switch assembly with a Hall detection element is installed in the lower cover shell, and a magnet assembly is installed in the lock core assembly; after the seat belt lock tongue is inserted into the lock core assembly, the magnet assembly is driven to reciprocate. The beneficial effect is that after the lock tongue is inserted into the lock core assembly, the false alarm of the locked state is reduced, and the accuracy of the signal transmission of the unlocked and locked states of the seat belt, i.e., the state of the passenger not wearing the seat belt and the state of wearing the seat belt, is improved; by installing the switch assembly in the lower cover shell, it can be separated from the lock core assembly, thereby preventing the internal structure of the lock core assembly from affecting it when it is driven by the lock tongue, thereby making the installation structure of the switch assembly more stable.

Description

Technical Field

[0001] The invention relates to the technical field of seat belt buckles, and in particular to a seat belt buckle with a switch. Background Art

[0002] Seat belts can effectively reduce the damage to passengers in a car collision, so mass-produced models are required to be equipped with seat belts. In a buckle-type seat belt, the locking tongue is locked and unlocked to enable people to wear seat belts or not. The buckle device needs to have sound and light reminder functions to remind people to wear seat belts.

[0003] The existing lock has the function of determining whether the lock tongue is locked or unlocked. The principle is that the different positions of the pop-up member act on the mechanical switch, and through the on and off of the switch, a signal is generated and output to the vehicle control system. The vehicle system outputs sound and light prompts according to its set logic. The mechanical switch can only provide the identification of the passage and the circuit break, and cannot identify the passage and circuit break caused by the fault circuit failure, resulting in false alarms. Based on the above reasons, the applicant proposes a lock structure that can output signals stably and has a low false alarm rate. Summary of the invention

[0004] The purpose of the present invention is to provide a seat belt buckle with a switch in order to solve the above-mentioned problem. The preferred technical solution among the many technical solutions provided by the present invention has the following technical effects: the seat belt status signal output is stable and the false alarm rate is low, as described below for details.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A seat belt buckle with a switch provided by the present invention comprises a lock core assembly, an upper cover shell and a lower cover shell, wherein the upper cover shell and the lower cover shell are respectively located above and below the lock core assembly and can be mutually engaged to form a cover body on the outside of the lock core assembly, a switch assembly with a Hall detection element is installed in the lower cover shell, and a magnet assembly is installed in the lock core assembly; after the seat belt lock tongue is inserted into the lock core assembly, the magnet assembly is driven to reciprocate, and reaches a locked position when the lock tongue is inserted into the innermost side of the lock core assembly, and the magnet assembly is directly opposite to the Hall detection element on the switch assembly when moving to the locked position.

[0007] Preferably, the lock core assembly includes a groove-shaped seat, a locking functional part is arranged inside the groove-shaped seat, and a pop-up part cooperating with the magnet assembly is arranged on the groove-shaped seat, one end of the pop-up part extends out of the side surface of the groove-shaped seat, and the pop-up part can reciprocate in the groove-shaped seat as the lock tongue is inserted and removed.

[0008] Preferably, the magnet assembly includes a magnet bracket and a magnet, and the magnet is engaged with the magnet bracket through an elastic member; a accommodating cavity for accommodating the magnet is provided on the inner side of the magnet bracket, and one side of the accommodating cavity is open. After the magnet is inserted into the accommodating cavity through the opening, the elastic member forms an elastic shielding at the opening.

[0009] Preferably, an elastic buckle is provided on the magnet bracket, and a D-shaped groove matching the elastic buckle is formed on the pop-up member, and the elastic buckle is snap-fitted with the D-shaped groove.

[0010] Preferably, the openings may be arranged at the top and the side of the magnet support.

[0011] Preferably, the switch assembly includes a PCBA and a switch chip, the switch chip is a Hall switch, and the PCBA is connected to the automobile system through a wire.

[0012] Preferably, the PCBA is a long strip structure, and the length direction is consistent with the movement direction of the magnet assembly; guide columns and fixing buckles are respectively formed at both ends of the PCBA.

[0013] Preferably, a square hole matching the guide column is formed inside the lower cover shell, and the guide column is inserted into the square hole to fix one end of the PCBA; a snap-in structure matching the fixing buckle is formed inside the lower cover shell, and the snap-in structure is snapped with the fixing buckle to fix the other end of the PCBA.

[0014] In summary, the beneficial effects of the present invention are as follows: 1. After the lock tongue is inserted into the lock core assembly, the pop-up member drives the magnet assembly to move to a state facing the chip, and the lock tongue can be determined to be in a locked state, while the magnet assembly and the chip are not facing each other, which reduces the false alarm of the locked state and improves the accuracy of the signal transmission of the unlocking and locking states of the seat belt, that is, the state of the passenger not wearing the seat belt and the state of wearing the seat belt;

[0015] 2. By installing the switch assembly in the lower cover, it can be separated from the lock core assembly, thereby preventing the internal structure of the lock core assembly from affecting it when it is driven by the lock tongue, thereby making the installation structure of the switch assembly more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the explosion structure of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the lock core assembly of the present invention;

[0019] Figure 3 It is a schematic diagram of the exploded structure of the magnet assembly of the present invention;

[0020] Figure 4 is a schematic diagram of the structure of the switch assembly of the present invention;

[0021] Figure 5 It is a schematic diagram of the assembly structure of the magnet assembly and the lock core assembly of the present invention;

[0022] Figure 6 yes Figure 5 A schematic diagram of the structure of the middle magnet assembly viewed from above;

[0023] Figure 7 It is a schematic diagram of the assembly structure of the switch assembly and the lower cover of the present invention;

[0024] Figure 8 It is a structural schematic diagram of the present invention in an unlocked state;

[0025] Fig. 9 It is a structural schematic diagram of the present invention in a locked state;

[0026] Fig.10 is a schematic structural diagram of a first embodiment of a magnet assembly of the present invention;

[0027] Fig.11 is a schematic structural diagram of a second embodiment of a magnet assembly of the present invention;

[0028] Fig.12 It is a structural schematic diagram of the third embodiment of the magnet assembly of the present invention.

[0029] The following are the descriptions of the reference numerals:

[0030] 1. Lock core assembly; 11. Slot seat; 12. Pop-up piece; 12a. D-shaped slot; 2. Upper cover; 3. Lower cover; 3a. Square hole; 3b. Fixing buckle; 4. Magnet assembly; 41. Magnet; 42. Magnet bracket; 42a. Elastic buckle; 5. Switch assembly; 51. PCBA; 51a. Guide column; 51b. Snap-in structure; 52. Switch chip; 6. Lock tongue. DETAILED DESCRIPTION

[0031] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0032] The following combination Figure 1-Figure 9 The present invention is described in further detail.

[0033] See also Figure 1 As shown, the present invention provides a safety belt buckle with a switch, comprising a lock core assembly 1, an upper cover shell 2 and a lower cover shell 3, wherein the upper cover shell 2 and the lower cover shell 3 are respectively located above and below the lock core assembly 1, and can be mutually engaged to form a cover body on the outside of the lock core assembly 1, a switch assembly 5 with a Hall detection element is installed in the lower cover shell 3, and a magnet assembly 4 is installed in the lock core assembly 1; after the safety belt lock tongue 6 is inserted into the lock core assembly 1, the magnet assembly 4 is driven to reciprocate, and reaches a locked position when the lock tongue 6 is inserted into the innermost side of the lock core assembly 1, and the magnet assembly 4 is directly opposite to the Hall detection element on the switch assembly 5 when it moves to the locked position. The magnet assembly 4 is driven to move when the lock tongue 6 is inserted and removed, and when it is driven to move to the locked position, the magnet assembly 4 is directly opposite to the Hall detection element, and at this time, the output of the Hall detection element is high current, and it can be judged that the safety belt buckle is in a locked state at this time; on the contrary, if the magnet assembly 4 is not directly opposite to the Hall detection element, the Hall detection element outputs a low current, and at this time, the safety belt buckle is in an unlocked state.

[0034] like Figure 2 As shown, the lock core assembly 1 includes a groove seat 11, a buckle lock function part is arranged inside the groove seat 11, and a pop-up part 12 cooperating with the magnet assembly 4 is arranged on the groove seat 11, one end of the pop-up part 12 extends out of the side of the groove seat 11, and the pop-up part 12 can reciprocate in the groove seat 11 as the lock tongue 6 is plugged in and out; the pop-up part 12 is located in the groove seat 11, one end of the pop-up part 12 extends out of the groove seat 11, and the end is engaged with the magnet assembly 4, so that when the lock tongue 6 drives the pop-up part 12 to move, the magnet assembly 4 is driven to move;

[0035] like Figure 3 As shown, the magnet assembly 4 includes a magnet bracket 42 and a magnet 41, and the magnet 41 is engaged with the magnet bracket 42 through an elastic member; a receiving cavity for receiving the magnet 41 is provided on the inner side of the magnet bracket 42, and one side of the receiving cavity is opened. After the magnet 41 is inserted into the receiving cavity through the opening, the elastic member forms an elastic shield at the opening; the opening can be provided at the top and side of the magnet bracket 42, such as Figure 10-12 As shown, there are two forms in which the openings are arranged on the side of the magnet support 42 and one form in which the openings face upwards;

[0036] like Figure 5 As shown, the magnet bracket 42 is provided with an elastic buckle 42a, and the pop-up member 12 is formed with a D-shaped groove 12a matching the elastic buckle 42a, and the elastic buckle 42a is engaged with the D-shaped groove 12a. Figure 6 As shown, the elastic buckles 42a are respectively clamped at both ends of the D-shaped groove 12a, so that the magnet 41 directly forms a stable connection structure with the ejection member 12;

[0037] like Figure 4 As shown, the switch assembly 5 includes a PCBA 51 and a switch chip 52, the switch chip 52 is a Hall switch, and the PCBA 51 is connected to the automobile system through a wire; the PCBA 51 is a long strip structure, and the length direction is consistent with the movement direction of the magnet assembly 4; the two ends of the PCBA 51 are respectively formed with a guide column 51a and a fixing buckle 3b;

[0038] like Figure 7 As shown, a square hole 3a matching the guide column 51a is formed inside the lower cover 3, and the guide column 51a is inserted into the square hole 3a to fix one end of the PCBA51; a snap-in structure 51b matching the fixing buckle 3b is formed inside the lower cover 3, and the snap-in structure 51b is snapped with the fixing buckle 3b to fix the other end of the PCBA51; by fixing both ends of the PCBA51 in the lower cover 3, the PCBA51 can be separated from the lock core assembly 1 to avoid damage to the structure on the PCBA51 when the internal structure of the lock core assembly 1 moves, thereby improving the stability of the PCBA51; at the same time, when the structure fails, only the lower cover 3 needs to be disassembled to repair the PCBA51, which improves the convenience and efficiency of the repair;

[0039] Using the above structure, Figure 8 As shown, the seat belt buckle is in an unlocked state. At this time, the magnet assembly 4 is at the farthest point from the Hall switch driven by the ejection member 12, and the magnet 41 is not directly opposite to the Hall switch. At this time, the Hall switch outputs a low current to the circuit, and the system determines that the seat belt buckle is in an unlocked state.

[0040] like Fig. 9 As shown, the lock tongue 6 is inserted into the lock core assembly 1, which is the locked state of the seat belt buckle. At this time, the magnet assembly 4 is driven by the pop-up member 12 to be directly opposite to the Hall switch. At this time, the Hall switch outputs a high current, and the system determines that the seat belt buckle is in a locked state.

[0041] After the lock tongue 6 is inserted into the lock core assembly 1, the pop-up piece 12 drives the magnet assembly 4 to move to a state facing the chip, and the lock tongue 6 can be determined to be in a locked state. When the magnet assembly 4 is not facing the chip, it is in an unlocked state, thereby reducing false alarms of the locked state and improving the accuracy of the signal transmission of the seat belt unlocking and locking states, that is, the passenger not wearing the seat belt state and the passenger wearing the seat belt state; by installing the switch assembly 5 in the lower cover shell 3, it can be separated from the lock core assembly 1, thereby preventing the internal structure of the lock core assembly 1 from affecting it when it is driven by the lock tongue 6, thereby making the installation structure of the switch assembly 5 more stable.

[0042] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A seat belt buckle with a switch, characterized in that: The invention comprises a lock core assembly (1), an upper cover shell (2) and a lower cover shell (3), wherein the upper cover shell (2) and the lower cover shell (3) are respectively located above and below the lock core assembly (1) and can be mutually engaged to form a cover body on the outer side of the lock core assembly (1); a switch assembly (5) with a Hall detection element is installed in the lower cover shell (3); and a magnet assembly (4) is installed in the lock core assembly (1); after the safety belt lock tongue (6) is inserted into the lock core assembly (1), the magnet assembly (4) is driven to perform reciprocating motion, and reaches a locked position when the lock tongue (6) is inserted into the innermost side of the lock core assembly (1); when the magnet assembly (4) moves to the locked position, it faces the Hall detection element on the switch assembly (5); The lock core assembly (1) comprises a slot-shaped seat (11), a locking function part is arranged inside the slot-shaped seat (11), a pop-up part (12) cooperating with the magnet assembly (4) is arranged on the slot-shaped seat (11), one end of the pop-up part (12) extends out of the side surface of the slot-shaped seat (11), and the pop-up part (12) can reciprocate in the slot-shaped seat (11) as the lock tongue (6) is inserted or pulled out; The magnet assembly (4) comprises a magnet bracket (42) and a magnet (41), wherein the magnet (41) is engaged with the magnet bracket (42) via an elastic member; a receiving cavity for receiving the magnet (41) is provided on the inner side of the magnet bracket (42), one side of the receiving cavity is open, and after the magnet (41) is inserted into the receiving cavity through the opening, the elastic member forms an elastic shield at the opening; The magnet bracket (42) is provided with an elastic buckle (42a), the ejection member (12) is formed with a D-shaped groove (12a) matching the elastic buckle (42a), and the elastic buckle (42a) is engaged with the D-shaped groove (12a); The switch assembly (5) comprises a PCBA (51) and a switch chip (52), the switch chip (52) is a Hall switch, and the PCBA (51) is connected to a vehicle system via a wire; The PCBA (51) is a long strip structure, and the length direction is consistent with the movement direction of the magnet assembly (4); guide columns (51a) and fixing buckles (3b) are respectively formed at two ends of the PCBA (51); A square hole (3a) matching the guide column (51a) is formed inside the lower cover shell (3), and the guide column (51a) is inserted into the square hole (3a) to fix one end of the PCBA (51); a snap-in structure (51b) matching the fixing buckle (3b) is formed inside the lower cover shell (3), and the snap-in structure (51b) is snap-connected with the fixing buckle (3b) to fix the other end of the PCBA (51).

2. A seat belt buckle with a switch according to claim 1, characterized in that: The openings may be arranged on the top and the side of the magnet support (42).

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