High safety seat belt switch

Abstract

The utility model discloses a high security's safety belt switch, including casing and bolt, the casing is inserted and is connected cavity and electricity receiving cavity, the inserted and is connected cavity is inserted and is connected the mouth of the bolt, the fixed slot of both is opened between inserted and is connected cavity and electricity receiving cavity, still include clutching mechanism, first contact mechanism and second contact mechanism, first contact mechanism includes first elastic sheet, second contact mechanism includes second elastic sheet, first elastic sheet and second elastic sheet insert electricity receiving cavity, first elastic sheet and second elastic sheet abut, the clutching mechanism is located in the casing, when the bolt is inserted to the inserted and is connected cavity, under the action of clutching mechanism can make second elastic sheet and first elastic sheet separate. The utility model discloses the intercommunication and the disconnection between first elastic sheet and second elastic sheet are realized through the resistance pressure pressing block in the process of bolt insertion and removal, has improved the reliability of the electric connection between two elastic sheets.

Description

Technical Field

[0001] This application relates to the technical field of seat belt lock switches, and in particular to a high-safety seat belt switch. Background Technology

[0002] Car seat belts are safety devices designed to restrain occupants during a collision and to prevent them from colliding with the steering wheel and dashboard, or from being ejected from the vehicle and sustaining injuries.

[0003] In modern cars, seat belt switches typically employ a structure where a latch and a buckle are inserted together. When the seat belt latch is inserted into the buckle, the latch abuts against the pin on the seat belt buckle body, thereby causing the pin to insert between a pair of spring contacts. This separates the pair of spring contacts, thus switching the circuit.

[0004] However, in actual use, during the long-term insertion and removal of the latch, the pin and the two springs constantly come into contact and rub against each other. Since the pin is made of insulating plastic, the pin will generate debris from the long-term friction between the pin and the two springs. This debris will get stuck between the pin and the two springs, increasing the friction between the pin and the springs. At the same time, the debris generated by the friction between the two springs and the pin will also adhere to the surface of the two springs. When the pin is pulled out from between the two springs, the part where the two springs abutted will be blocked by plastic debris, reducing the reliability of the electrical connection between the two springs. The electrical signal of the seat belt connecting or disconnecting will become unstable, posing a safety hazard. Utility Model Content

[0005] To prevent debris from being generated by contact between the pin and the spring, a highly secure seat belt switch is provided.

[0006] The above-mentioned objective of this application is achieved through the following technical solution:

[0007] A high-safety seat belt switch includes a housing and a pin. The housing has a insertion cavity and a power connection cavity. The insertion cavity has a socket for inserting the pin. A fixing groove connecting the insertion cavity and the power connection cavity is provided. The switch also includes a clutch mechanism, a first contact mechanism, and a second contact mechanism. The first contact mechanism includes a first spring, and the second contact mechanism includes a second spring. The first and second springs are inserted into the power connection cavity and abut against each other. The clutch mechanism is located inside the housing. When the pin is inserted into the insertion cavity, the clutch mechanism can separate the second spring from the first spring.

[0008] The clutch mechanism includes a pressing block and a separating block, which are fixed together. The pressing block is inserted into the insertion cavity from the fixing groove, and the separating block is located in the electrical connection cavity, with the side of the separating block facing the second spring directly abutting against the second spring.

[0009] By adopting the above technical solution, when the pin is not inserted into the insertion cavity, the first and second spring contacts are in contact. When the pin is inserted into the insertion cavity, the end of the pin facing the insertion cavity contacts the pressing block. As the pin is pushed into the insertion cavity, the side wall of the pin contacts the upper end of the pressing block. The side wall of the pin presses the pressing block into the fixing groove. The pressing block will drive the separating block to move into the electrical cavity. Then the separating block presses and moves the second spring, separating the second spring from the first spring, causing the second spring to move away from the first spring. Thus, the connection and disconnection between the first and second springs are achieved by pressing the pressing block during the insertion and removal of the pin. The pin does not directly contact the first and second springs, avoiding the generation of debris and improving the reliability of the electrical connection between the two springs.

[0010] Optionally, a limiting member is fixed in the fixing groove, the limiting member passes through a limiting hole that connects the insertion cavity and the electrical connection cavity, and the separating block is slidably connected in the limiting hole.

[0011] By adopting the above technical solution, when the pressing block moves toward the fixed groove, the pressing block drives the separating block to move. The limiting hole can limit the separating block, so that the separating block can smoothly press and move against the second spring piece.

[0012] Optionally, the side of the pressing block facing the socket is an inclined curved surface.

[0013] By adopting the above technical solution, when the pin moves toward the insertion cavity, the side of the pressing block facing the pin is set as an inclined curved surface. The inclined curved surface will contact the pin before the top of the pressing block, which makes it easier for the pin to press against the pressing block and reduces the risk of the pressing block blocking when the pin is inserted into the insertion cavity.

[0014] Optionally, one end of the separating block passes through the fixing groove, and a snap-fit ​​block is fixed at the end. The second spring sheet has a through snap-fit ​​groove, and the snap-fit ​​block snaps into the snap-fit ​​groove.

[0015] By adopting the above technical solution, when the pressing block moves toward the fixed groove, the locking block on the end of the separating block will drive the second spring to move away from the first spring. The locking block and the locking groove are locked together. When the pin moves out of the insertion cavity, the locking block and the locking groove are locked together. The second spring blocks the locking block to prevent the separating block from popping out of the fixed groove, thereby improving the connection reliability between the clutch mechanism and the second spring.

[0016] As another embodiment, the clutch mechanism includes a rotating rod, a pressing block, and a separating block. The axial direction of the rotating rod is parallel to the insertion direction of the pin. One end of the pressing block is fixedly connected to the rotating rod, and the other end extends from the rotating rod into the insertion cavity. One end of the separating block is fixedly connected to the rotating rod, and the other end extends from the rotating rod into the electrical contact cavity and abuts against the second spring.

[0017] By adopting the above technical solution, when the pin is not inserted into the insertion cavity, the first and second spring contacts each other. When the pin is inserted into the insertion cavity, the end of the pin facing the insertion cavity contacts the pressing block. As the pin is pushed into the insertion cavity, the pressing block moves downward into the fixing groove. The pressing block drives the separating block to rotate, and then the separating block presses the second spring away from the first spring, causing the second spring to separate from the first spring. The connection and disconnection between the first and second springs are achieved by pressing the pressing block during the insertion and removal of the pin. The pin does not directly contact the first and second springs, avoiding the generation of debris and improving the reliability of the electrical connection between the two springs.

[0018] Optionally, the distance by which the pressing block extends outward from the axis of the rotating rod is greater than the distance by which the separating block extends outward from the axis of the rotating rod.

[0019] By adopting the above technical solution, when the length of the pressing block is too long, the force required for the contact between the pin and the pressing block needs to be greater. When the pin and the pressing block come into contact, the pressing block will not drive the separating block to move down. Only when the pin continues to insert into the insertion cavity and presses the end of the pressing block into the fixing groove will the pressing block drive the separating block to move. In turn, the separating block will drive the second spring to separate from the first spring. In some vibrating environments, this avoids the hidden danger of the pin and the pressing block accidentally contacting each other, which could lead to the separation of the second spring from the first spring. At the same time, it reduces the distance that the separating block moves against the second spring, preventing the separating block from pressing against the second spring and causing excessive deformation of the second spring.

[0020] Optionally, a snap-fit ​​seat is also installed inside the housing, and the rotating rod is rotatably connected to the snap-fit ​​seat and the housing.

[0021] By adopting the above technical solution, the rotating rod is rotatably connected within the housing and the locking seat, and the housing and the locking seat limit the rotation of the rotating rod, thereby improving the stability of the rotating rod during rotation.

[0022] Optionally, the first spring sheet has a first protrusion on the side facing the second spring sheet, and the second spring sheet has a second protrusion on the side facing the first spring sheet, with the second protrusion abutting against the first protrusion.

[0023] By adopting the above technical solution, when the first spring and the second spring are connected, the second protrusion on the second spring abuts against the first protrusion on the first spring, which increases the degree of electrical connection between the first spring and the second spring and improves the connection reliability between the first spring and the second spring.

[0024] In summary, this application has at least the following beneficial effects:

[0025] In this invention, during the insertion of the pin into the insertion cavity, the end of the pin facing the insertion cavity abuts against the pressing block, causing the pressing block to move or rotate, thereby separating the second spring from the first spring. Thus, the connection and disconnection between the first and second springs are achieved by the pin pressing against the pressing block during insertion and removal. The pin does not directly contact the first and second springs, avoiding the generation of debris and improving the reliability of the electrical connection between the two springs. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a high-safety seat belt switch;

[0027] Figure 2 A cross-sectional view of a high-safety seatbelt switch;

[0028] Figure 3 This is an exploded cross-sectional view of the housing and clutch mechanism;

[0029] Figure 4 This is a schematic diagram of the structure of the first contact mechanism and the second contact mechanism;

[0030] Figure 5 for Figure 2 A magnified view of a portion at point A;

[0031] Figure 6 Schematic diagram of the connection between the clutch mechanism and the second contact mechanism Figure 1 ;

[0032] Figure 7 Exploded cross-sectional view of a high-safety seatbelt switch;

[0033] Figure 8 Schematic diagram of the connection between the clutch mechanism and the second contact mechanism Figure 2 .

[0034] Reference numerals: 1. Housing; 11. Insertion cavity; 111. Insertion port; 12. Electrical connection cavity; 13. Fixing groove; 14. Limiting member; 141. Insertion part; 1411. Limiting hole; 142. Mounting part; 15. Snap-fit ​​seat; 2. Pin; 3. Clutch mechanism; 31. Pressing block; 32. Separating block; 33. Snap-fit ​​block; 34. Rotating rod; 4. First contact mechanism; 41. First connecting piece; 42. First spring piece; 421. First protrusion; 5. Second contact mechanism; 51. Second connecting piece; 52. Second spring piece; 521. Snap-fit ​​groove; 522. Second protrusion. Detailed Implementation

[0035] The following section provides a more detailed description, in conjunction with the accompanying diagrams: Example

[0036] As attached Figure 1 and attached Figure 2 As shown, a high-safety seat belt switch includes a housing 1, a pin 2, a clutch mechanism 3, a first contact mechanism 4, and a second contact mechanism 5.

[0037] The clutch mechanism 3 is located inside the housing 1. When the pin 2 is inserted into the insertion cavity 11, the clutch mechanism 3 can separate the second spring 52 from the first spring 42.

[0038] The housing 1 has a plug-in cavity 11 and a power connection cavity 12. The plug-in cavity 11 has a socket 111 for inserting the plug pin 2. When the plug pin 2 is inserted into the plug-in cavity 11 and plugged into the housing 1, the plug pin 2 abuts against the two sides of the plug-in cavity 11. A fixing groove 13 is provided between the plug-in cavity 11 and the power connection cavity 12 to connect the two.

[0039] The corner of the pin 2 facing the insertion cavity 11 is rounded, which makes it easier for the pin 2 to be inserted into the insertion cavity 11.

[0040] As attached Figure 2 and attached Figure 3 As shown, a limiting member 14 is fixed inside the fixing groove 13. The limiting member 14 is located inside the fixing groove 13. Specifically, the limiting member 14 includes a plug-in part 141 and a mounting part 142. One end of the mounting part 142 is fixed to the groove wall of the fixing groove 13, and the other end of the mounting part 142 extends toward the axial direction of the fixing groove 13, and the extended end is fixed with the plug-in part 141. The plug-in part 141 has a limiting hole 1411 that connects the plug-in cavity 11 and the electrical connection cavity 12.

[0041] As attached Figure 3 and attached Figure 4As shown, the first contact mechanism 4 includes a first connecting piece 41 and a first spring piece 42; the first connecting piece 41 is located inside the housing 1, one end of the first spring piece 42 is fixedly connected to the first connecting piece 41, and the first spring piece 42 has a first protrusion 421 on the end of the first spring piece 42 located near the mounting part 142.

[0042] The second contact mechanism 5 includes a second connecting piece 51 and a second spring piece 52. The second connecting piece 51 is located inside the housing 1. One end of the second spring piece 52 is fixedly connected to the second connecting piece 51. The second spring piece 52 is located on the side of the first spring piece 42 facing away from the mounting portion 142. A snap-fit ​​groove 521 is opened on the end of the second spring piece 52 near the insertion portion 141. The snap-fit ​​groove 521 is aligned with the limiting hole 1411. The axis of the limiting hole 1411 can pass through the snap-fit ​​groove 521. The side of the second spring piece 52 facing the first spring piece 42 also has a second protrusion 522. The second protrusion 522 on the second spring piece 52 abuts against the first protrusion 421 on the first spring piece 42, increasing the electrical connection strength between the first spring piece 42 and the second spring piece 52 and improving the connection reliability between the first spring piece 42 and the second spring piece 52.

[0043] As attached Figure 5 and attached Figure 6 As shown, the clutch mechanism 3 includes a pressing block 31 and a separating block 32. The pressing block 31 is elongated. The length of the pressing block 31 perpendicular to the axis of the limiting hole 1411 is greater than the outer diameter of the limiting hole 1411. The pressing block 31 is located in the insertion cavity 11, and one side of the pressing block 31 is an inclined curved surface. The inclined curved surface will contact the pin 2 before the top of the pressing block 31, which makes it convenient for the pin 2 to press the pressing block 31 and reduces the risk of the pressing block 31 blocking when the pin 2 is inserted into the insertion cavity 11.

[0044] Separating block 32 is located inside electrical cavity 12. Separating block 32 is cylindrical in shape. Separating block 32 is slidably connected to limiting hole 1411. One end of separating block 32 is fixedly connected to pressing block 31. The other end of separating block 32 is fixed with snap-fit ​​block 33, which passes through limiting hole 1411 and snaps into snap-fit ​​groove 521.

[0045] The snap-fit ​​block 33 is long and narrow. The length of the snap-fit ​​block 33 in the axial direction perpendicular to the separating block 32 is greater than the width in the slotting direction perpendicular to the snap-fit ​​groove 521, but less than the length in the slotting direction of the snap-fit ​​groove 521. The snap-fit ​​block 33 is directly snapped into the second spring piece 52 on the side facing the second spring piece 52.

[0046] During installation, press down the pressing block 31, and pass the end of the separating block 32 with the locking block 33 fixed thereon through the limiting hole 1411 and the locking groove 521 in sequence. After the locking block 33 passes through the locking groove 521, press down on the pressing block 31 in the direction of the second spring piece 52 and rotate the pressing block 31. After rotating 90°, the locking block 33 is perpendicular to the second spring piece 52. Then release the pressure on the pressing block 31 so that the locking block 33 is locked with the second spring piece 52, which facilitates the assembly and disassembly of the clutch mechanism 3 and improves the efficiency of future maintenance.

[0047] The working principle of this embodiment one:

[0048] When the pin 2 is located outside the insertion cavity 11, the first spring piece 42 and the second spring piece 52 abut against each other, and the first contact mechanism 4 and the second contact mechanism 5 are electrically connected. After the pin 2 is inserted into the insertion cavity 11, the end of the pin 2 facing the insertion cavity 11 abuts against the end of the pressing block 31 facing the pin 2. As the pin 2 continues to be inserted into the insertion cavity 11, the side wall of the pin 2 presses against the pressing block 31 and moves towards the fixing groove 13. The locking block 33 drives the second spring piece 52 to move towards the electrical cavity 12, so that the second protrusion 522 of the second spring piece 52 and the first protrusion 421 of the first spring piece 42 are disconnected from each other, the second spring piece 52 and the first spring piece 42 are separated, and the electrical connection between the second spring piece 52 and the first spring piece 42 is broken.

[0049] The advantage of this first embodiment is:

[0050] After the pin 2 is inserted into the insertion cavity 11, the pin 2 moves against the pressing block 31. Since the locking block 33 is engaged with the locking groove 521 on the second spring 52, the locking block 33 will drive the second spring 52 to move, causing the first spring 42 and the second spring 52 to disconnect from each other. Thus, the contact and disconnection between the first spring 42 and the second spring 52 are achieved through the structure of the locking block 33 engaging with the locking groove 521. The pin 2 does not directly contact the first spring 42 and the second spring 52, which improves the reliability of the electrical connection between the first spring 42 and the second spring 52 and reduces the number of maintenance operations. Example

[0051] As attached Figure 7 and attached Figure 8 As shown, a high-safety seat belt switch is an improvement on the clutch mechanism 3 based on Embodiment 1.

[0052] The clutch mechanism 3 also includes a rotating rod 34, a pressing block 31, and a separating block 32. The rotating rod 34 is cylindrical in shape, and its axial direction is parallel to the insertion direction of the pin 2. A locking seat 15 is installed in the electrical cavity 12. There are two locking seats 15, and the rotating rod 34 is rotatably connected within the two locking seats 15.

[0053] The pressing block 31 is located inside the insertion cavity 11. The pressing block 31 is long and narrow. One end of the pressing block 31 is fixedly connected to the rotating rod 34, and the other end of the pressing block 31 extends toward the insertion cavity 11 with a smooth transition at the end.

[0054] The separating block 32 is located inside the electrical cavity 12. The separating block 32 is long and narrow. One end of the separating block 32 is fixedly connected to the rotating rod 34, and the other end of the separating block 32 abuts against the second spring piece 52. The end is smoothly transitioned.

[0055] The distance that the pressing block 31 extends outward from the axis of the rotating rod 34 is greater than the distance that the separating block 32 extends outward from the axis of the rotating rod 34. Therefore, the force required for the pin 2 to contact the pressing block 31 needs to be greater. In some vibrating environments, this avoids the hidden danger of the second spring 52 separating from the first spring 42 due to accidental contact between the pin 2 and the pressing block 31. At the same time, it reduces the distance that the separating block 32 presses against the second spring 52 and moves downward, preventing the separating block 32 from pressing against the second spring 52 and causing excessive deformation of the second spring 52.

[0056] The working principle of this second embodiment:

[0057] When the pin 2 is located outside the insertion cavity 11, the first spring 42 and the second spring 52 abut against each other, and the first contact mechanism 4 and the second contact mechanism 5 are electrically connected. After the pin 2 is inserted into the insertion cavity 11, the end of the pin 2 facing the insertion cavity 11 abuts against the side of the pressing block 31 facing the pin 2. As the pin 2 continues to be inserted into the insertion cavity 11, the side wall of the pin 2 presses against the pressing block 31 and moves towards the fixing groove 13. The rotating rod 34 rotates in the locking seat 15, thereby causing the separating block 32 to drive the second spring 52 to move, so that the second spring 52 is separated from the first spring 42, and the electrical connection between the second spring 52 and the first spring 42 is broken.

[0058] The advantage of this second embodiment is that:

[0059] The end of the pressing block 31 away from the rotating rod 34 is located in the insertion cavity 11, and the separating block 32 is located in the electrical connection cavity 12 and abuts against the second spring 52. The pressing block 31 and the separating block 32 occupy a small space in the housing 1 and can be well integrated into the seat belt buckle device without taking up too much space.

[0060] In summary: when the pin 2 is inserted into the insertion cavity 11, the pin 2 does not come into contact with the first spring 42 or the second spring 52, so the pin 2 will not be rubbed and generate debris. At the same time, the first spring 42 and the second spring 52 are located in the electrical connection cavity 12, which avoids interference to the first spring 42 and the second spring 52 due to factors such as vibration and accidental contact, thereby ensuring the accuracy of seat belt status detection and greatly improving driving safety.

[0061] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection claimed in this application.

Claims

1. A high-safety seat belt switch, comprising a housing (1) and a pin (2), wherein the housing (1) has a insertion cavity (11) and a power connection cavity (12), and the insertion cavity (11) has a socket (111) for inserting the pin (2), characterized in that, A fixed groove (13) is provided between the insertion cavity (11) and the electrical connection cavity (12) to connect the two; it also includes a clutch mechanism (3), a first contact mechanism (4) and a second contact mechanism (5). The first contact mechanism (4) includes a first spring (42), and the second contact mechanism (5) includes a second spring (52). The first spring (42) and the second spring (52) are inserted into the electrical connection cavity (12). The first spring (42) and the second spring (52) abut against each other. The clutch mechanism (3) is located inside the housing (1). When the pin (2) is inserted into the insertion cavity (11), the second spring (52) can be separated from the first spring (42) under the action of the clutch mechanism (3).

2. The high-safety seat belt switch according to claim 1, characterized in that, The clutch mechanism (3) includes a pressing block (31) and a separating block (32). The pressing block (31) and the separating block (32) are fixed together. The pressing block (31) is inserted into the insertion cavity (11) from the fixing groove (13). The separating block (32) is located in the electrical connection cavity (12), and the side of the separating block (32) facing the second spring (52) directly abuts against the second spring (52).

3. A high-safety seat belt switch according to claim 2, characterized in that, The fixing groove (13) is fixed with a limiting member (14), the limiting member (14) is through a limiting hole (1411) that connects the plug-in cavity (11) and the electrical cavity (12), and the separating block (32) is slidably connected in the limiting hole (1411).

4. A high-safety seat belt switch according to claim 2, characterized in that, The side of the pressing block (31) facing the socket (111) is an inclined curved surface.

5. A high-safety seat belt switch according to claim 2, characterized in that, One end of the separating block (32) passes through the fixing groove (13) and the end is fixed with a snap-fit ​​block (33). The second spring sheet (52) has a through snap-fit ​​groove (521) and the snap-fit ​​block (33) snaps into the snap-fit ​​groove (521).

6. A high-safety seatbelt switch according to claim 1, characterized in that, The clutch mechanism (3) includes a rotating rod (34), a pressing block (31), and a separating block (32). The axial direction of the rotating rod (34) is parallel to the insertion direction of the pin (2). One end of the pressing block (31) is fixedly connected to the rotating rod (34), and the other end extends from the rotating rod (34) into the insertion cavity (11). One end of the separating block (32) is fixedly connected to the rotating rod (34), and the other end extends from the rotating rod (34) into the electrical connection cavity (12) and abuts against the second spring (52).

7. A high-safety seat belt switch according to claim 6, characterized in that, The distance that the pressing block (31) extends outward from the axis of the rotating rod (34) is greater than the distance that the separating block (32) extends outward from the axis of the rotating rod (34).

8. A high-safety seat belt switch according to claim 6, characterized in that, The housing (1) is also equipped with a snap-fit ​​seat (15), and the rotating rod (34) is rotatably connected to the snap-fit ​​seat (15) and the housing (1).

9. A high-safety seat belt switch according to claim 1, characterized in that, The first spring (42) has a first protrusion (421) on the side facing the second spring (52), and the second spring (52) has a second protrusion (522) on the side facing the first spring (42), and the second protrusion (522) abuts against the first protrusion (421).

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