Seat belt removal detection switch

Abstract

The present application provides a seat belt removal detection switch, comprising: a printed board having a circuit for detecting removal of a seat belt; a movable plate slidingly moved in conjunction with insertion of a tongue plate of the seat belt; a rotor having a shaft connected to the movable plate, rotatably installed on the printed board, and rotated in conjunction with pressing of the tongue plate into a buckle; and a brush installed on a surface of the rotor opposite to the printed board, having a leg portion changing a contact / non-contact state with a conductive portion of the circuit according to a rotation state of the rotor.

Description

Technical Field

[0001] This invention relates to a seatbelt removal and installation detection switch. Background Technology

[0002] As a prior art for seat belt buckle switches, there is, for example, Patent Document 1 (Japanese Patent Application Publication No. 2016-159723).

[0003] The seatbelt buckle switch of Patent Document 1 includes: a base plate disposed inside the buckle; an electrode region formed on the base plate; a slider slidably mounted on the base plate and sliding in conjunction with the removal and installation of a tongue plate; a movable terminal having one or more conductive feet extending in the sliding direction of the slider and contacting the base plate or the electrode region, so as to be in either contact or non-contact with the electrode region by sliding the slider on the base plate; and a guide portion formed by providing one or more stepped portions on the base plate, the stepped portions extending continuously or discontinuously along at least a portion of the electrode region, and the movable terminal being guided by the stepped portions when the slider slides.

[0004] Since the operating direction of the seat belt buckle switch in Patent Document 1 is the same as that of the latch plate, there is a technical problem that a switch with the same operating range as the movable area of ​​the latch plate is required, and the size of the switch will be increased. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a small seat belt removal detection switch.

[0006] The seat belt removal detection switch of the present invention has a printed circuit board, a movable plate, a rotor and a brush.

[0007] The printed circuit board includes a circuit for detecting the installation and removal of a seatbelt. A movable plate slides as the seatbelt's latch is inserted. A rotor, having a rod connected to the movable plate, is rotatably mounted on the printed circuit board and rotates as the latch is pressed into the buckle. Brushes are mounted on the surface of the rotor opposite the printed circuit board and have legs that change the state of contact / non-contact with the conductive parts of the circuit according to the rotor's rotation.

[0008] It can be configured as a small seatbelt removal and installation detection switch. Attached Figure Description

[0009] Figure 1 This is an exploded 3D view of the seatbelt removal and installation test switch.

[0010] Figure 2 This is a 3D diagram of the seatbelt removal and testing switch.

[0011] Figure 3 This is a 3D view of the seatbelt removal and installation detection switch without the printed circuit board.

[0012] Figure 4 This is a top view of the initial state of the seatbelt removal and installation detection switch.

[0013] Figure 5 This is a top view of the seatbelt removal and installation detection switch in the forward rotation state.

[0014] Figure 6 It is a three-dimensional diagram showing the state of connection with the first movable plate and the second movable plate. Detailed Implementation

[0015] Hereinafter, embodiments of the present invention will be described in detail. Furthermore, components having the same function will be labeled with the same reference numerals, and repeated descriptions will be omitted.

[0016]

Example 1

[0017] The following is for reference Figure 1 The structure of the seatbelt removal detection switch in Embodiment 1 is explained. As shown in the figure, the seatbelt removal detection switch 1 of this embodiment has a printed circuit board 11, a rotor 12, and a brush 14. Furthermore, the seatbelt removal detection switch 1 of this embodiment is connected to the first movable plate and the second movable plate (described later) as components, but the first movable plate and the second movable plate can also be considered as components of the seatbelt removal detection switch 1. Additionally, the first movable plate 2 and the second movable plate 3 can be made of resin material. The first movable plate 2 and the second movable plate 3 are fixed to each other. Alternatively, the first movable plate 2 and the second movable plate 3 can be integrally molded into a single component.

[0018] The printed circuit board 11 has a first circuit 111, a second circuit 112, a hole 113, a slit 114, a first groove 115, and a second groove 116. The rotor 12 includes a rod 121, a shaft 122, a claw 123, a first protrusion 124, a second protrusion 125, and a protrusion portion 127. The brush 14 includes a first foot 141 and a second foot 142.

[0019] like Figure 2 As shown, the rotor 12 is rotatably mounted on the printed circuit board 11. Specifically, the rotor 12 has a shaft 122 extending toward the printed circuit board 11, and the printed circuit board 11 has a hole 113 that engages with the shaft 122, so that the rotor 12 can rotate the shaft 122 as a rotation axis.

[0020] The rotor 12 has a rod 121 protruding in a direction perpendicular to the rotation direction of the rotor 12. At the front end of the rod 121 is a protrusion 127 that protrudes away from the printed circuit board 11 and inserts into a groove in a second movable plate on the seatbelt buckle side, thereby connecting the rod 121 to the second movable plate (described later). The rotor 12 rotates in the forward direction (the direction indicated by the hollow arrow B in the figure) as the tongue plate is pressed into the buckle.

[0021] In addition, the rotor 12 has a claw 126 extending toward the printed circuit board 11 and extending in a direction different from the extension direction (away from the rotation center), and the printed circuit board 11 has an arc-shaped slit 114 through which the claw 126 is inserted. The front end of the claw 126 extends out and engages with the slit 114 to prevent the rotor 12 from floating or falling off.

[0022] Similarly, the rotor 12 has claws 123 extending toward the printed circuit board 11 and extending in a direction different from the extension direction (the direction closer to the center of rotation). The front end of the claws 123 engages with the arc-shaped area of ​​the printed circuit board 11 to prevent the rotor 12 from floating or falling off.

[0023] In addition, the rotor 12 has a first protrusion 124 that restricts forward rotation (the direction of rotation marked by the hollow arrow B in the figure) and a second protrusion 125 that restricts reverse rotation. The printed circuit board 11 has a first groove 115 that engages with the first protrusion 124 when the rotor 12 is at a predetermined limit angle of forward rotation, and a second groove 116 that engages with the second protrusion 125 when the rotor 12 is at a predetermined limit angle of reverse rotation. The first groove 115 and the second groove 116 are cut into an arc shape.

[0024] like Figure 3 As shown, the brush 14 is mounted on the surface of the rotor 12 opposite to the printed circuit board, and has a first foot 141 and a second foot 142. The first foot 141 changes its contact / non-contact state with the conductive part of the first circuit 111 on the printed circuit board 11 according to the rotation state of the rotor 12, and the second foot 142 changes its contact / non-contact state with the conductive part of the second circuit 112 on the printed circuit board 11 according to the rotation state of the rotor 12. Furthermore, the first circuit 111 and the second circuit 112 are circuits used for detecting the removal and installation of the seat belt.

[0025] Figure 4 This indicates the direction of rotor 12 in its initial state. Figure 5 The direction of rotor 12 indicates that it has completed one revolution in the forward direction.

[0026] like Figure 6As shown, in this embodiment, the seatbelt removal / installation detection switch 1 is connected to the first movable plate 2 and the second movable plate 3. As described above, the first movable plate 2 and the second movable plate 3 can also be formed as a single component. The first movable plate 2 and the second movable plate 3 slide along the direction of the arrow mark P in the figure, accompanied by the insertion of the tongue plate. The second movable plate 3 has a groove 31, and the protrusion 127 is inserted into the groove 31. The groove 31 is a stepped shape composed of a first straight section 31a, an inclined section 31b, and a second straight section 31c. The first straight section 31a extends in the tongue plate pulling direction. The inclined section 31b is adjacent to the first straight section 31a and is closer to the tongue plate pulling direction than the first straight section 31a. It is inclined at an angle θ (θ < 90°) with the extension direction of the first straight section 31a as a reference and extends in the tongue plate pulling direction. The second straight section 31c is adjacent to the inclined section 31b and is located closer to the tongue plate pulling direction than the inclined section 31b. It extends in a direction parallel to the extension direction of the first straight section 31a.

[0027] The second movable plate 3 slides along the direction of arrow P in the figure as the tongue plate is inserted. Simultaneously, the protrusion 127 moves within the groove 31 and passes through the inclined portion 31b. At this time, the protrusion 127 is subjected to force in the direction of the hollow arrow B by colliding with the edge of the inclined portion 31b in the pulling direction of the tongue plate, and rotates in the direction of that arrow. Figure 5 (In this state). The protrusion 127 moves within the second straight section 31c via the inclined section 31b. During the insertion of the tongue plate, the rotor 12 is in Figure 5 The rotation state is shown.

[0028] Next, the second movable plate 3 slides in the opposite direction to the hollow arrow mark P in the figure, accompanied by the pulling of the tongue plate. As a result, the protrusion 127 moves within the second straight section 31c and passes through the inclined section 31b again. At this time, the protrusion 127, by colliding with the edge of the tongue plate in the pressing direction of the inclined section 31b, is subjected to force in the direction of the hollow arrow mark F, and rotates in the direction of that arrow mark. Figure 4 In this state, the protrusion 127 moves within the first straight section 31a via the inclined section 31b. When the tongue plate is pulled out, the rotor 12 is in the position... Figure 4 The state shown.

[0029] According to the seat belt removal detection switch 1 of this embodiment, the conventional slider that slides along a single axis in conjunction with the insertion and pulling of the seat belt tongue plate into the buckle is replaced by a rotating rotor 12, thereby enabling miniaturization. Furthermore, the claws 123 and 126 provided on the rotor 12 prevent the rotor 12 from floating up or falling off the printed circuit board 11. Additionally, by providing the first protrusion 124 and the second protrusion 125 on the rotor 12 and the first groove 115 and the second groove 116 that engage with them, the rotor 12 can rotate within a predetermined angle range.

[0030] In addition, a stepped groove 31 is provided on the second movable plate 3, through which the protrusion 127 of the rotor 12 is inserted. As the tongue plate is disassembled and assembled, the protrusion 127 moves within the inclined portion 31b, thereby causing the rotor 12 and brush 14 to rotate, and the contact / non-contact state of the first circuit 111 and the second circuit 112 changes, thereby enabling precise detection of the disassembly and assembly of the tongue plate.

Claims

1. A seatbelt removal and installation detection switch, wherein, include: A printed circuit board having circuitry for detecting the removal and installation of seat belts; A movable plate that slides as the tongue of the seatbelt is inserted; The rotor, having a rod connected to the movable plate, is rotatably mounted on the printed circuit board and rotates as the tongue is pressed into the latch; A brush, mounted on the surface of the rotor opposite to the printed circuit board, has feet that change their contact / non-contact state with the conductive parts of the circuit according to the rotation state of the rotor. The rod has a protrusion at its front end that protrudes away from the printed circuit board and is inserted into a slot in the movable plate. The groove has: a first straight portion that extends in the tongue plate drawing direction; The inclined portion is closer to the tongue plate pulling direction than the first straight portion, and the inclined angle θ is θ < 90° with the extension direction of the first straight portion as a reference, and it extends in the tongue plate pulling direction. The second straight section extends in a direction parallel to the extension direction of the first straight section, which is closer to the tongue plate pulling direction than the inclined section.

2. The seat belt removal and installation detection switch as described in claim 1, wherein, The rotor has a shaft extending toward the printed circuit board. The printed circuit board has a hole that fits into the shaft.

3. The seat belt removal and installation detection switch as described in claim 1, wherein, The rotor has claws that extend toward the printed circuit board and extend in a direction different from the direction of extension. The printed circuit board has an arc-shaped slit through which the claws are inserted.

4. The seat belt removal and installation detection switch as described in claim 1, wherein, The rotor has a first protrusion that restricts forward rotation and a second protrusion that restricts reverse rotation. The printed substrate has: The first groove engages with the first protrusion when the rotor is at a predetermined limit angle of forward rotation; The second groove engages with the second protrusion when the rotor is at a predetermined limit angle of reverse rotation.

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