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, a switch assembly with a Hall detection element is arranged on one side of the lock core assembly, and a magnet assembly is installed on the lock core assembly. The beneficial effect is that after the lock tongue is inserted into the lock core assembly, the magnet assembly is driven by the ejection member 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, i.e., the state of the passenger not wearing the seat belt and the state of wearing the seat belt; after the shielding cover with magnetic isolation is provided, the electromagnetic compatibility of the chip can be improved, so that it can be used in a system with high electromagnetic compatibility.

Description

Technical Field

[0001] The invention relates to the technical field of automobile safety belts, and in particular to a safety 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. The buckle is a part of the seat belt that locks and unlocks the lock tongue to enable people to wear or not wear seat belts. 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 arranged on one side of the lock core assembly, and a magnet assembly is installed on 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 switch assembly includes a PCBA on which the Hall detection element is installed and a switch bracket, the PCBA is fixedly mounted on the switch bracket, and the switch bracket is fixedly engaged with the slot-shaped seat, so that a channel for the magnet assembly to slide is formed between the PCBA and the side of the slot-shaped seat; the PCBA is connected to the automobile control system via a wire.

[0009] Preferably, the slot-shaped seat is formed with a first clamping column and a second clamping column that match the switch bracket, and the switch bracket is formed with a first buckle that clamps and matches the first clamping column and a clamping hole that matches the second clamping column. The switch bracket is attached to the surface of one side of the slot-shaped seat, so that after the first clamping column is matched with the first buckle and the second clamping column is matched with the clamping hole, the switch bracket is limited in four directions.

[0010] Preferably, a snap-in hole is formed on the groove seat, and the snap-in hole is located between the first snap-in column and the second snap-in column. The switch bracket is provided with an expansion buckle matching the snap-in hole, and the expansion buckle passes through the snap-in hole and is fixed thereto.

[0011] Preferably, the PCBA comprises a PCB board, a chip of a Hall detection element and peripheral circuit components, and the PCB board is fixedly connected to the switch bracket by a buckle.

[0012] Preferably, a shielding cover is installed on the PCB board, and the shielding cover is located outside the chip and the peripheral circuit components.

[0013] Preferably, the magnet assembly comprises a magnet and a magnet bracket, the magnet is snap-fitted and fixed to the inner side of the magnet bracket, and the magnet bracket is snap-fitted with the pop-up member.

[0014] Preferably, a C-shaped hole is formed on the side of the pop-up member facing away from the slotted seat, and a connecting column that snaps into the C-shaped hole is formed on the magnet bracket, and the axial direction of the connecting column is perpendicular to the projection of the sliding direction of the magnet.

[0015] Preferably, a square hole for fixing one end of the switch assembly is formed on the inner side of the lower cover shell, and the end of the switch assembly is plug-fitted into the square hole.

[0016] 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;

[0017] 2. After setting up a magnetic shielding cover, the electromagnetic compatibility of the chip can be improved, so that it can be used in systems with higher electromagnetic compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 It is a schematic diagram of the explosion structure of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the lock core assembly of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the magnet assembly of the present invention;

[0022] Figure 4 is a schematic diagram of the structure of the switch assembly of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of PCBA;

[0024] Figure 6 It is a schematic diagram of the assembly structure of the switch assembly and the lock core assembly of the present invention;

[0025] Figure 7 It is a schematic diagram of the assembly structure of the magnet assembly and the lock core assembly of the present invention;

[0026] Figure 8 It is a schematic diagram of the assembly structure of the magnet assembly and the lower cover shell of the present invention;

[0027] Fig. 9 It is a schematic diagram of the structure of the present invention in an unlocked state;

[0028] Fig.10 It is a structural schematic diagram of the locking state of the present invention.

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

[0030] 1. Lock core assembly; 11. Slot seat; 11a. First clamping column; 11b. Clamping hole; 11c. Second clamping column; 12. Pop-up piece; 12a. C-shaped hole; 2. Upper cover shell; 3. Lower cover shell; 4. Magnet assembly; 41. Magnet; 42. Magnet bracket; 42a. Connecting column; 5. Switch assembly; 51. Switch bracket; 52. Wire; 53. PCBA; 531. PCB board; 531a. Guide column; 532. Chip; 533. Peripheral circuit assembly; 534. Shielding cover; 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 8 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 on both sides of 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 arranged on one side of the lock core assembly 1, and a magnet assembly 4 is installed on 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 member 12 cooperating with the magnet assembly 4 is arranged on the groove seat 11, one end of the pop-up member 12 extends out of the side of the groove seat 11, and the pop-up member 12 can reciprocate in the groove seat 11 as the lock tongue 6 is plugged in and out; the pop-up member 12 is located in the groove seat 11, one end of which 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 member 12 to move, the magnet assembly 4 is driven to move;

[0035] like Figure 4 and Figure 5 As shown, the switch assembly 5 includes a PCBA 53 on which a Hall detection element is installed and a switch bracket 51. The PCBA 53 is fixedly installed on the switch bracket 51. The switch bracket 51 is fixedly connected to the groove seat 11, so that a channel for the magnet assembly 4 to slide is formed between the PCBA 53 and the side of the groove seat 11. After the lock tongue 6 is inserted into the lock core assembly 1, the magnet assembly 4 is driven to slide inside the channel through the pop-up member 12; the PCBA 53 is connected to the automobile control system through the wire 52; the PCBA 53 includes a PCB board 531, a chip 532 of the Hall detection element and a peripheral circuit assembly 533, the chip 532 is a Hall switch, and the PCB board 531 is fixedly connected to the switch bracket 51 through a buckle; a shielding cover 534 is installed on the PCB board 531, and the shielding cover 534 is located on the outside of the chip 532 and the peripheral circuit assembly 533; the shielding cover 534 can improve the electromagnetic compatibility of the Hall switch, so that the device can be used in a system with high electromagnetic compatibility.

[0036] like Figure 6 As shown, the slot-shaped seat 11 is formed with a first clamping column 11a and a second clamping column 11c that match the switch bracket 51, and the switch bracket 51 is formed with a first clamping buckle that is clamped and matched with the first clamping column 11a and a clamping hole that matches the second clamping column 11c. The switch bracket 51 is attached to the surface of one side of the slot-shaped seat 11, so that after the first clamping column 11a is matched with the first clamping buckle and the second clamping column 11c is matched with the clamping hole, the switch bracket 51 is limited in four directions. After the four-way limit, The switch bracket 51 is prevented from sliding along the side surface of the groove seat 11; a clamping hole 11b is formed on the groove seat 11, and the clamping hole 11b is located between the first clamping column 11a and the second clamping column 11c. The switch bracket 51 is provided with an expansion buckle matching the clamping hole 11b, and the expansion buckle passes through the clamping hole 11b and is fixed to the clamping hole 11b; by inserting the expansion buckle into the clamping hole 11b, the switch bracket 51 can be positioned, so that the switch bracket 51 is in a stable state on the side of the groove seat 11.

[0037] like Figure 3 As shown, the magnet assembly 4 includes a magnet 41 and a magnet bracket 42. The magnet 41 is snap-fitted and fixed to the inner side of the magnet bracket 42, and the magnet bracket 42 is snap-fitted with the ejection member 12; Figure 7 As shown, a C-shaped hole 12a is formed on the side of the pop-up member 12 facing away from the slot-shaped seat 11, and a connecting column 42a is formed on the magnet bracket 42 to snap-fit ​​with the C-shaped hole 12a, and the axial direction of the connecting column 42a is perpendicular to the projection of the sliding direction of the magnet 41; the axial direction of the connecting column 42a and the sliding direction of the magnet 41 are set to be perpendicular to the projection, which can prevent the magnet bracket 42 from escaping from the C-shaped hole 12a during the sliding process, thereby improving the stability of the connection and movement between the magnet bracket 42 and the pop-up member 12.

[0038] like Figure 8 As shown, a square hole is formed on the inner side of the lower cover shell 3 for fixing one end of the switch assembly 5, and a guide column 531a is formed on the end of the PCB board 531. The end of the switch assembly 5 is plugged into the square hole, that is, the guide column 531a at the end of the PCB board 531 is inserted into the square hole to improve the stability of the PCB board 531 after it is fixed.

[0039] Using the above structure, Fig. 9 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.10 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 532, and then the lock tongue 6 can be determined to be in a locked state. When the magnet assembly 4 and the chip 532 are not facing each other, they are both 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; after providing a magnetic isolation shielding cover 534, the electromagnetic compatibility of the chip 532 can be improved, so that it can be used in a system with high electromagnetic compatibility.

[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 outside of the lock core assembly (1); a switch assembly (5) with a Hall detection element is arranged on one side of the lock core assembly (1), and the lock core assembly (1) is installed with a magnet assembly (4); 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 slotted seat (11), a locking function part is arranged inside the slotted seat (11), a pop-up part (12) cooperating with the magnet assembly (4) is arranged on the slotted seat (11), one end of the pop-up part (12) extends out of the side of the slotted seat (11), and the pop-up part (12) can reciprocate in the slotted seat (11) as the lock tongue (6) is inserted or pulled out; The switch assembly (5) comprises a PCBA (53) on which the Hall detection element is mounted and a switch bracket (51); the PCBA (53) is fixedly mounted on the switch bracket (51); the switch bracket (51) is fixedly engaged with the slot-shaped seat (11) so that a channel for the magnet assembly (4) to slide is formed between the PCBA (53) and the side surface of the slot-shaped seat (11); the PCBA (53) is connected to a vehicle control system via a wire (52); The groove-shaped seat (11) is formed with a first clamping column (11a) and a second clamping column (11c) that match the switch bracket (51); the switch bracket (51) is formed with a first clamping buckle that is clamped and matched with the first clamping column (11a) and a clamping hole that is clamped and matched with the second clamping column (11c); the switch bracket (51) is attached to a surface of one side of the groove-shaped seat (11), so that after the first clamping column (11a) is engaged with the first clamping buckle and the second clamping column (11c) is engaged with the clamping hole, the switch bracket (51) is limited in four directions; A clamping hole (11b) is formed on the groove-shaped seat (11), and the clamping hole (11b) is located between the first clamping column (11a) and the second clamping column (11c); an expansion buckle matching the clamping hole (11b) is provided on the switch bracket (51), and the expansion buckle passes through the clamping hole (11b) and is fixed thereto; The PCBA (53) comprises a PCB board (531), a chip (532) of a Hall detection element, and a peripheral circuit component (533); the PCB board (531) is fixedly connected to the switch bracket (51) via a buckle; A shielding cover (534) is installed on the PCB board (531), and the shielding cover (534) is located outside the chip (532) and the peripheral circuit component (533).

2. A seat belt buckle with a switch according to claim 1, characterized in that: The magnet assembly (4) comprises a magnet (41) and a magnet bracket (42); the magnet (41) is snap-fitted and fixed to the inner side of the magnet bracket (42); and the magnet bracket (42) is snap-fitted and matched with the ejection member (12).

3. A seat belt buckle with a switch according to claim 2, characterized in that: A C-shaped hole (12a) is formed on the side of the ejector (12) facing away from the slot-shaped seat (11), and a connecting column (42a) is formed on the magnet bracket (42) for snap-fitting with the C-shaped hole (12a), wherein the axial direction of the connecting column (42a) is perpendicular to the projection of the sliding direction of the magnet (41).

4. A seat belt buckle with a switch according to claim 1, characterized in that: A square hole for fixing one end of the switch assembly (5) is formed on the inner side of the lower cover shell (3), and the end of the switch assembly (5) is plug-fitted into the square hole.

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