JPH078922U - switch - Google Patents

Abstract

(57) [Abstract] [Purpose] In order to reliably allow the deformation of the electrode layer to the contact position within a predetermined range in the longitudinal direction, a gap is provided between the electrode layers so as to reach the end in the longitudinal direction beyond the predetermined range. Even if is formed, the pressing force is not applied to the end portion in the longitudinal direction outside the predetermined range, the inconvenience caused by forming the gap outside the predetermined range is eliminated, and proper switch operation is guaranteed. The electrode layers 52, 54 have an end portion in the longitudinal direction whose longitudinal direction is the vehicle up-down direction, bent in the lateral direction of the vehicle, and the electrode layer 5 has a bent shape according to the bent shape of the end portions.
Coating layers 58 and 60 covering the outer surfaces of 2, 54, and the electrode layer 5
In the frame 57 of the electrode interlayer insulating layer 56 formed between the 2 and 54
The gap is also bent. If the bent end is not bent, the pressing force that acts from outside the vehicle in the lateral direction in an attempt to bend the end, for example, the pressing force that accompanies the deformation of the door outer plate 13, is already applied to the bent end. As long as it is bent, it does not reach the bent end.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a switch in which a pair of electrode layers facing each other are electrically connected to each other by being pressed and deformed from a separated position to a contact position.

[0002]

[Prior art]

 BACKGROUND ART An airbag device is known as a device for protecting an occupant in the event of a vehicle collision.

Normally, in the case of a collision from the front of the vehicle, the vehicle sudden deceleration is detected and the air bag device is operated. However, even in the case of a side collision, the airbag device is operated. It is proposed to activate.

For this purpose, a side collision detection sensor for detecting a side collision is required. As the side collision detection sensor, as shown in FIG. 10 (arrow FR indicates the front of the vehicle, arrow UP indicates the front of the vehicle, and arrow OUT indicates the outside of the vehicle in the lateral direction), a squib current direct-cut thin switch. It is conceivable to use 102 and install it in the door of the vehicle as described below.

This switch has a long plate-like outer shape, and inside thereof, as shown in FIG. 11, a pair of electrode layers 104 and 106 are arranged so as to face each other, and the facing surfaces of the electrode layers 104 and 106 are opposite to each other. A frame-shaped electrode interlayer insulating layer 108 is interposed therebetween. The outer surfaces of the electrode layers 104 and 106 are covered with coating layers 110 and 112.

In the door, the switch 102 is attached to the lower plate 136 with the direction in which the electrode layers 104 and 106 face each other is the vehicle lateral direction, and the longitudinal direction is the vehicle vertical direction. On the other hand, the pressure receiving plate 130 curved around the vertical line of the vehicle is arranged on the lower plate 136 so that the switch 102 is interposed between the pressure receiving plate 130 and the lower plate 136. When the impact load due to the side collision acts on the door, first, the pressure receiving plate 130 is pressed by the door outer plate 134, and is deformed to contact the electrode layer 104 via the coating layer 110. Thereby, in the gap between the electrode layers 104 and 106 formed in the frame 120 of the inter-electrode layer insulating layer 108, the electrode layers 104 and 106 are pressed and deformed from the separated position to the contact position. As a result, the electrode layers 104 and 106 are electrically connected to each other, and an electric signal is output to the airbag device side via the terminal plates 116 and 118.

[0007]

[Problems to be solved by the device]

 By the way, in the switch 102, when the vehicle collides with the door, the portion which first comes into contact with the door is considered to be a bumper. Since the height of the bumper differs depending on the type of vehicle, an impact load acts on the sensor not only from the lateral direction but also from the diagonal direction within a range of approximately 45 ° above and below.

The impact load from the oblique direction is received by the upper and lower ends of the pressure receiving plate 130.

Therefore, even if the pressure receiving plate 130 is pressed and deformed at the upper and lower ends, the switch 102 operates under a predetermined impact load so that the upper and lower ends of the electrode interlayer insulating layer 108 in the frame 120 are activated. Are preferably positioned so as to project above and below the upper and lower ends of the pressure receiving plate, respectively.

On the other hand, particularly when an impact load is applied to the sensor from an oblique direction, the door outer plate 134 that is deformed by the impact load is upward and downward from each upper and lower end of the pressure receiving plate 130. The switch 102 also comes into contact with the ends of the protruding switches 102 and applies a pressing force to the ends (FIG. 11 shows the door outer plate 135 after deformation). This may cause the end of the switch 102 to bend inward in the vehicle lateral direction with the lower end of the lower plate 136 as a fulcrum.

When the end portion of the switch 102 is bent, the pressure receiving plate 130 causes the electrode layer 104 to move over the electrode layer 104, particularly when the upper and lower ends of the frame 120 are excessively protruded from the upper and lower ends of the pressure receiving plate. Even if the electrode layers 104 and 106 are not pressed so much that they are deformed to the contact position (regardless of a predetermined impact load being applied), the electrode layers 104 and 106 are in the frame 120 at the end of the switch 102. It is possible that the switch 102 is deformed to the contact position and the switch 102 is activated. Further, since the end portion of the switch 102 is bent, plastic deformation occurs at the end portion, the distance between the electrode layers 104 and 106 in the frame 120 becomes small, and proper operation thereafter may not be ensured. . Further, there is a possibility that the joint between the coating layers 104 and 106 may be opened by the end portion of the switch 102 attempting to counteract the pressing force exerted by the door outer plate 134 on the end portion of the switch 102. Further, even if the end portion of the switch 102 is not bent, the door outer plate 134 is deformed and the electrode layer 104 is directly pressed by the inside 120 of the frame, which may cause a malfunction of the switch 102. It

In order to solve this, it is necessary to accurately position the upper and lower ends of the electrode interlayer insulating layer 108 inside the frame 120 at the height of the upper and lower ends of the pressure receiving plate 132.

In consideration of the above facts, the present invention extends beyond the predetermined range to reach the end portion in the longitudinal direction in order to reliably allow the deformation of the electrode layer to the contact position within the predetermined range in the longitudinal direction. Even if a gap is formed between the electrode layers, the pressing force is not applied to the end portion in the longitudinal direction outside the predetermined range, and the inconvenience caused by forming the gap outside the predetermined range is eliminated, and the proper The aim is to provide a switch that ensures switch operation.

[0014]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a pair of long plate-shaped electrode layers that are arranged opposite to each other and are bent in the thickness direction at the longitudinal ends, and a gap is provided between the two electrode layers. This gap is bent according to the bending shape of the bent end of the electrode layer and extends along the longitudinal direction of the electrode layer. Within the gap, the electrode layer is allowed to press and deform from the separated position to the contact position and makes contact. And a coating layer that is bent according to the bent shape of the bent end of the electrode layer to cover the outer surface of the electrode layer. It proposes a switch to.

[0015]

[Action]

 According to the switch of the present invention, when the electrode layer is pressed by the impact load from the side of the vehicle through the coating layer, for example, the electrode layer within the gap formed between the electrode layers by the interlayer insulating layer is formed. Then, deformation occurs from the separated position to the contact position, and the electrode layers are electrically connected at the contact position. As a result, an electric signal is output and, for example, an airbag device that protects an occupant against a side collision can be operated.

Here, the electrode layer is bent at its longitudinal end, and the covering layer and the gap are also bent according to the bent shape of the end, so that the bent side of the bent end is When the pressing force acts from the opposite side, if the bent end of the electrode layer is not bent, the pressing force that tries to bend the end is the end as long as the end is already bent. It is possible to avoid a situation in which, for example, the end portion is bent and the switch malfunctions due to receiving such a pressing force, which does not reach the portion.

In the remaining portion excluding the bent end portion, regardless of whether or not the end portion is bent, a predetermined pressing force is applied, and the contact portion can be deformed in the gap.

Therefore, in order to reliably allow the deformation of the electrode layer to the contact position within the predetermined range in the longitudinal direction, a gap is formed between the electrode layers so as to extend beyond the predetermined range and reach the end portion in the longitudinal direction. However, since the pressing force does not reach the end portion in the longitudinal direction outside the predetermined range, the inconvenience caused by forming the gap outside the predetermined range is eliminated, and proper switch operation is guaranteed.

[0019]

【Example】

 A switch according to an embodiment of the present invention will be described with reference to FIGS. In each figure, FR indicates the front of the vehicle, UP indicates the upper side of the vehicle, and OUT indicates the outer side in the lateral direction of the vehicle.

2 to 4 show a side collision detection sensor using the switch according to this embodiment. The side collision detection sensor includes a primary sensor 10 and a secondary sensor 12, and is provided inside the door 11 of the vehicle.

First, the secondary sensor 12 is attached to the vehicle lateral side outer side of the side impact beam 14 for reinforcing the door that extends in the vehicle front-rear direction. In the secondary sensor 12, as shown in FIG. 4, the substrate 16 is fixed to the peripheral surface of the side impact beam 14, and the substrate 16 is formed with a concave portion 18 that is opened outward in the vehicle lateral direction. A membrane switch 20 is fixedly attached to the bottom of the plate, and the recess 18 is closed by a cover plate 22. The substrate 16, the concave portion 18, the membrane switch 20, and the cover plate 22 which form the secondary sensor 12 extend over the entire dimension of the side impact beam 14 in the longitudinal direction, and the external shape of the entire secondary sensor 12 is the front and rear of the vehicle. It is formed in a long plate shape having a longitudinal direction and a vehicle vertical direction as a width direction.

According to the secondary sensor 12, when an impact load is applied to the cover plate 22 from the lateral side of the vehicle through the door 11 of the vehicle, the cover plate 22 is pressed inward in the lateral direction of the vehicle and is recessed. The shape of 18 is crushed, and the membrane switch 20 in the recess 18 is pressed. As a result, the membrane switch 20 operates, and the occupant protection device (not shown) is connected via the pair of terminal plates 24, 26 connected to the membrane switch 20 and projecting in an L-shape above the vehicle at the vehicle front end. For example, an electric signal is output to an airbag device or the like.

On the other hand, a plurality of primary sensors 10 are mounted on the secondary sensor 12 at predetermined intervals along the longitudinal direction thereof (three primary sensors 10 are shown in FIG. 3). . In each primary sensor 10, a lower plate 28 is attached to the secondary sensor 12. The lower plate 28 is composed of a pair of facing pieces 30 and a back piece 32, and is formed in a substantially U shape when viewed from the vehicle front-rear direction. The back piece 32 abuts on the outer side surface of the secondary sensor 12 in the vehicle lateral direction. The facing piece 30 is elastically engaged with the secondary sensor 12 so as to sandwich the upper and lower ends of the secondary sensor 12. According to this, the primary sensor 10 can be attached to and detached from the secondary sensor 12, and the mounting position is also free.

The back plate 32 of the lower plate 28 is provided with an upper plate 34 on the side opposite to the secondary sensor 12. The upper plate 34 has a rectangular shape when viewed from the lateral direction of the vehicle, one end of which in the vehicle front-rear direction is a fixed end 36 fixed to the lower plate 28, and the other end is fixed to the lower plate 28. Instead, it is a free end portion 38 which is slidably contacted with the front and rear of the vehicle. The central portion of the upper plate 34 in the vehicle front-rear direction is curved in an arc around the vertical line of the vehicle and bulges outward in the lateral direction of the vehicle. The curved portion 40 has the curved portion 40 according to the present embodiment. A membrane switch 42 that constitutes a switch is housed.

As will be described later, the membrane switch 42 is formed in a long plate shape, and has a vehicle up-down direction as a longitudinal direction, and a vehicle front-rear direction as a width direction, along the top of the bending section 40 and along the lower plate 28 side. Installed on. Further, at the upper and lower ends of the upper plate 34, a total of four notches 44 are formed on the left and right sides through the membrane switch 42 when viewed from the vehicle lateral direction, and the lower notches 44 are provided corresponding to the notches 44, respectively. The back piece 32 of the plate 28 is provided with a total of four claw pieces 46. Each claw piece 46 is formed so as to stand up in an L shape, and can be locked and fixed so as to sandwich the membrane switch 42 from both sides in the width direction of the membrane switch 42. Note that the notch 44 prevents the curved portion 40 and the claw piece 46 from interfering with each other when the curved portion 40 of the upper plate 34 is deformed. Further, the notch 44 facilitates the attachment work when attaching the membrane switch 42.

The curved portion 40 of the upper plate 34 spreads so that the free end portion 38 of the upper plate 34 slides when a shock load is applied from the outside in the lateral direction of the vehicle through the door 11 of the vehicle. It is elastically deformed toward the switch 42. A rectangular rod-shaped actuator 47 is fixed along the longitudinal direction of the width direction central portion of the membrane switch 42, and the top portion of the curved portion 40 is deformed by the deformation of the curved portion 40 of the upper plate 34. It abuts the actuator 47 (shown by a chain line in FIG. 1A) and presses the membrane switch 42. As a result, the membrane switch 42 operates, and an electric signal is output to the airbag device side via the first and second terminal plates 48, 50 protruding from the upper end portion of the membrane switch 42.

Although the secondary sensor 12 operates under a high load to operate the airbag device, the primary sensor 10 operates under a low load, and if the plurality of primary sensors 10 do not operate, The airbag device is not activated. This corresponds to various impact modes.

That is, when the impact load is dispersedly applied to the door 10 (for example, when another vehicle collides with the door of the own vehicle), the impact load is partially caused by the secondary sensor 12. When the load is not so high as to be activated, but the load is required to activate the airbag device as a whole, the airbag device is activated by the operation of the plurality of primary sensors 10.

On the contrary, when the impact load is concentrated on a certain part of the door 11 (for example, when the door 11 of the own vehicle collides with a pole such as a utility pole), the impact load is applied to the air bag device. If the high load is required to be activated, the secondary sensor 12 is activated and the airbag device is activated regardless of whether the primary sensor 10 is activated or not.

Regarding the primary sensor 10, since the airbag device is not activated unless a plurality of primary sensors 10 are activated, the primary sensor 10 returns to the original state again after the impact load is removed. Therefore, it is necessary to prepare for the next impact load.

Next, the membrane switch 42 of the primary sensor 10 will be described in detail. In this membrane switch 42, as shown in FIG. 5, the first electrode layer 52 and the second electrode layer 54 form a pair of electrode layers, and are opposed to each other with an insulating electrode interlayer insulating layer 56 interposed therebetween. Has been done. The facing direction of the electrode layers 52 and 54 is the vehicle lateral direction, the first electrode layer 52 is located outside the vehicle lateral direction, and the second electrode layer 54 is located inside the vehicle lateral direction. Both electrode layers 52 and 54 are formed in a long plate shape when viewed from the facing direction, as shown in FIG. That is, each electrode layer 52, 54 has its layer thickness direction (thickness direction) as the vehicle lateral direction, extends long in the vehicle up and down direction with the vehicle front-rear direction as the width direction, and both longitudinal ends are in the vehicle lateral direction. It is bent at an angle α toward one side. Then, at one end (upper end) in the longitudinal direction, a first terminal plate 48 corresponding to the first electrode layer 52 and a second terminal plate 50 corresponding to the second electrode layer 54 are respectively provided. It is formed so as to extend integrally. The widths of the terminal plates 48, 50 are formed narrower than the widths of the electrode layers 52, 54, and the widths of the electrode layers 52, 54 are adjusted so that the terminal plates 48, 50 do not overlap when viewed from the facing direction of the electrode layers. 6 to 8), and the tips of the terminal plates 48 and 50 are bent in an L-shape so as to be opposite to each other. In addition, both the first terminal plate 48 and the second terminal plate 50 are arranged on the same surface (so as to be on the same surface as the electrode interlayer insulating layer 56) between the first electrode layer 52 and the second electrode layer 54. Steps are formed so that they are close to each other in the facing direction. The material of the electrode layers 52 and 54 and the terminal plates 48 and 50 can be spring phosphor bronze.

The electrode interlayer insulating layer 56 interposed between the electrode layers 52 and 54 is formed in a rectangular frame shape as viewed from the direction in which the electrode layers 52 and 54 face each other, and both ends in the longitudinal direction are inward in the vehicle lateral direction. It is tilted and bent (Fig. 8). Then, the peripheral portion of the electrode interlayer insulating layer 56 is slightly projected outward from between the peripheral portions of the facing surfaces of the electrode layers 52 and 54. As a result, in the frame 57 of the electrode interlayer insulating layer 56, a gap is formed in which the facing surfaces of the electrode layers 52 and 54 are separated by about 0 and 1 mm, and the gap is formed at the bent ends of the electrode layers 52 and 54. It is bent according to the bent shape of the portion and extends over both ends in the longitudinal direction of the electrode layers 52, 54 (FIG. 1). Then, in the frame 57, when the first electrode layer 52 is pressed from the outside, elastic deformation occurs between the electrode layers 52 and 54 from the separated position to the contact position, and the electrode layer 52 and 54 are contacted at the contact position. Are electrically conducted. When the pressing force is removed, it is returned to the original position and deformed. The material of the electrode interlayer insulating layer 56 can be polyethylene terephthalate (PET). When the material of the electrode interlayer insulating layer 56 is polyethylene terephthalate and the material of the electrode layers 52, 54 and the terminal plates 48, 50 is spring phosphor bronze, the electrode interlayer insulating layer 56 is the electrode layer 52, The electrode layers 52 and 54 and the terminal plates 48 and 50 are solder-plated (tin and lead) in order to protect the surfaces of the electrode layers 52 and 54 from the gas generated during the welding. It is plated with tin), tin or silver.

On the other hand, the outer surface of the first electrode layer 52 is covered with the central portion of the first coating layer 58, and the outer surface of the second electrode layer 54 is covered with the second coating layer 60 facing the first coating layer 52. Covered in the central part of the. Then, the opposing surface peripheral portions of the first coating layer 58 and the second coating layer 60 are joined by the coating adhesive 61. At this time, the coating layers 58 and 60 are deformed from the planar shape shown in FIG. 8 to a shallow dish shape having a substantially double step as shown in FIG. 9 and the electrode layers 52 and 54. It is bent according to the bent shape of the bent end of. The covering layers 58 and 60 also wrap the outer surfaces of the electrode layers 52 and 54 and the outer surface of the electrode interlayer insulating layer 56 protruding outward from between the peripheral surfaces of the facing surfaces of the electrode layers 52 and 54. The outer shape of the membrane switch 42 is a shape that is bent inward in the lateral direction of the vehicle at an angle α at both ends in the longitudinal direction. The material of the coating layers 58 and 60 may be insulating polyethylene terephthalate (PET).

The first terminal plate 48 and the second terminal plate 50 are taken out from the joint between the first coating layer 58 and the second coating layer 60.

In mounting the thus configured membrane switch 42 on the lower plate 28, the upper end of the curved portion 40 of the upper plate 34 is bent as shown in FIG. And the lower end of the curved portion 40 of the upper plate 34 is located substantially at the height immediately before the start of the bent shape, and the lower end of the curved portion 40 of the upper plate 34 is substantially the height of the bent lower end of the membrane switch 42. It is located in

Next, the operation of the above embodiment will be described. When the curved portion 40 of the upper plate 34 abuts and presses the actuator 47 on the first coating layer 58 due to the impact from the outside in the vehicle lateral direction, the electrode layers 52 and 54 are positioned within the frame 57 of the electrode interlayer insulating layer 56. Then, deformation occurs from the separated position to the contact position, and the electrode layers 52 and 54 are electrically connected at the contact position. As a result, an electric signal is output via the terminal plates 48, 50, and the airbag device can be operated.

Here, when another vehicle collides with the door, the height of the bumper that will first come into contact with the door 11 differs depending on the vehicle type, and as shown in FIG. It is considered that the impact load is applied not only from the lateral direction (arrow A) but also from diagonal directions (arrows B and C) within a range of approximately 45 ° above and below.

Due to the impact load from the oblique direction, a pressing force is applied to the upper and lower ends of the curved portion 40 of the upper plate 34.

The electrode layers 52 and 54 are bent at the ends in the longitudinal direction, and the gaps between the coating layers 52 and 54 and the inside of the frame 57 are also bent according to the bent shape of the ends, so that the frame The upper and lower ends 80, 82 of the inner part 57 are positioned outward from the upper and lower ends of the upper plate 34 and are pressed to the upper and lower ends of the curved portion 40 of the upper plate 34 (for example, in FIG. 1). As shown, even when the pressing force F) acting on the lower end of the curved portion 40 of the upper plate 34 is applied and the portion of the membrane switch 42 immediately before the start of the bending shape is pressed by the deformation of the curved portion 40, the electrode layer 52 is also pressed. , 54 is surely allowed to be deformed to the contact position.

On the other hand, particularly when the impact load acts on the primary sensor 10 from an obliquely vertical direction, the door outer plate 13 is displaced upward and downward from the upper and lower ends of the upper plate 34, respectively. Then, it is deformed toward the end of the membrane switch 42 (the position shown by the door outer plate 15). However, since the end of the membrane switch 42 is inclined inward in the lateral direction of the vehicle, it does not come into contact with the end and no pressing force is applied to the end. That is, if the bent ends of the electrode layers 52 and 54 are not bent, the pressing force for bending the ends does not reach the ends as long as the ends are already bent. For example, there is no possibility that the end portions will be bent and plastic deformation will occur in the frame 57 so that the distance between the electrode layers 52 and 54 will be narrowed. In addition, the impact load is not so large as to activate the membrane switch 42, and the upper plate 34 is not pressed with a force enough to deform the electrode layers 52, 54 to the contact position. A malfunction of the switch that would cause the electrode layers 52 and 54 to come into contact with each other at the ends is also prevented. Further, since the pressing force is not applied to the end portion, there is no fear that the contact portion between the covering layers 52 and 54, which is opposed to the pressing force, is opened.

The remaining portions of the electrode layers 52 and 54 excluding the bent ends are moved to the contact position in the frame 57 by receiving a predetermined pressing force regardless of whether the ends are bent or not. Can be modified.

Therefore, within a predetermined range in the longitudinal direction, that is, between the bending shape start position of the upper end portions of the electrode layers 52 and 54 and the bending shape start position of the lower end portions of the electrode layers 52 and 54, the electrode layer 52 Even if a gap is formed between the electrode layers 52, 54 so as to extend beyond the predetermined range to the bent ends of the electrode layers 52, 54 in order to reliably allow the deformation of the electrode layers 54, 54 to the contact position, Since the pressing force does not act on the electrode layers 52 and 54 corresponding to the gap in the frame 57 outside the predetermined range, the inconvenience resulting from forming the gap outside the predetermined range is eliminated, and proper switch operation is guaranteed. It

Furthermore, since a gap may be formed between the electrode layers 52 and 54 long enough beyond the predetermined range, the position within the frame with respect to the curved portion 40 of the upper plate 34, that is, within the frame 57. The height positions of the upper and lower ends 80 and 82 do not need to be positioned with excessive dimensional accuracy.

Further, the electrode interlayer insulating layer 56 is not bent between the electrode layers 52 and 54 in order to form the bent gap according to the bent shape of the bent ends of the electrode layers 52 and 54. It is also possible to intervene in a state and then bend both together at the end in the longitudinal direction, but beforehand bend the electrode layer and the electrode interlayer insulating layer individually at both ends in the longitudinal direction. It is extremely preferable to interpose the electrode interlayer insulating layer 56 between the electrode layers 52 and 54 in the bent state in order to maintain a small distance between the insulating layers in the manufacturing process.

The actuator 47 is fixed to the outer surface of the first coating layer 58, and both ends thereof are bent according to the outer surface shape of the coating layer 58. The actuator 47 has a curved portion 40 of the upper plate 34. Thus, the electrode layers 52 and 54 are reliably deformed in the frame 57 of the electrode interlayer insulation layer 56 by receiving the pressing force from the electrode layers.

Although the membrane switch 42 of the primary sensor 10 has been mainly described above, the membrane switch 20 of the secondary sensor 12 is also configured in the same manner as the membrane switch 42 of the primary sensor 10 and has the same operational effect. You can

The present invention is not limited to the above embodiment, but various modifications can be made. For example, in the above embodiment, the switch used for the side collision detection sensor for operating the airbag device as the occupant protection device in the case of a side collision of the vehicle has been described, but the present invention is not limited to this. For example, the airbag device may be installed inside the door, or may be installed in front of the driver's seat or in front of the passenger seat. It may be for operating other occupant protection devices such as a preloader for winding the webbing, or other devices, and is not limited to such a sensor.

Further, in the above embodiment, the curved portion 40 of the upper plate 34 is curved around the vehicle vertical direction line, and the longitudinal direction of the membrane switch 42 is the vehicle vertical direction. However, the present invention is not limited to this. It may be curved around the vehicle front-rear direction line. In this case, the longitudinal direction of the membrane switch 42 is the vehicle front-rear direction.

Furthermore, in the above embodiment, the peripheral portions of the facing surfaces of the coating layers 58 and 60 are joined, and the outer surface of the electrode interlayer insulating layer 56 is also covered with the coating layers 58 and 60 together with the outer surfaces of the electrode layers 52 and 54. However, the present invention is not limited to this, and the peripheral portion of the electrode interlayer insulating layer is widely projected outward and is interposed between the peripheral portions of the facing surfaces of the covering layer, and the frame outer peripheral surface of the electrode interlayer insulating layer is exposed. The covering layer may be separated at any part.

Further, including the electrode layers 52, 54 and the gap between them, the membrane switch 42 as a whole is bent at both ends in the longitudinal direction, but at least at one end thereof. As long as it is bent, it is possible to obtain the above-mentioned effects.

Further, the inclination angle α of the membrane switch 42 is freely set to a suitable angle.

In addition, in the above-described embodiment, the membrane switch 42 is attached to the back piece 32 of the lower plate 28 by the claw piece 46, but is similar to the claw piece 46 directly on the cover plate 22 of the secondary sensor 12. It is also possible to use a claw piece for locking or to bond it to the plate surface of the cover plate 22, and various means are applied to attach the membrane switch 42.

[0053]

EFFECTS OF THE INVENTION With the above-described structure, the switch according to the present invention is configured to extend beyond the predetermined range in order to reliably allow the electrode layer to be deformed to the contact position within the predetermined range in the longitudinal direction. Even if a gap is formed between the electrode layers so as to reach the end portion in the hand direction, the pressing force does not reach the end portion in the longitudinal direction outside the predetermined range, and the disadvantage is caused by forming the gap outside the predetermined range. Is eliminated and proper switch operation is guaranteed.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view with a part of line 1-1 of FIG. 7 omitted.

FIG. 2 is a diagram of a side collision detection sensor provided with a switch according to the first embodiment of the present invention, as viewed from the rear of the vehicle.

FIG. 3 is a diagram of a side collision detection sensor provided with a switch according to the present embodiment, as viewed from above the vehicle.

FIG. 4 is a perspective view of a side impact detection sensor provided with a switch according to the present embodiment.

5 is an enlarged sectional view taken along line 5-5 of FIG.

6 is an enlarged sectional view taken along line 6-6 of FIG.

FIG. 7 is a view of the switch according to the present embodiment as viewed from the lateral side of the vehicle.

FIG. 8 is an exploded perspective view of the switch according to the present embodiment.

FIG. 9 is a perspective view of a switch according to this embodiment.

FIG. 10 is a perspective view of a conventional switch.

FIG. 11 is a vertical cross-sectional view of a conventional switch seen from the width direction thereof.

[Explanation of symbols]

 42 Membrane Switch (Switch) 52 First Electrode Layer (Electrode Layer) 54 Second Electrode Layer (Electrode Layer) 56 Electrode Interlayer Insulation Layer 57 Inside Frame (Gap) 58 First Cover Layer (Coating Layer) 60 Second Cover Layer ( Coating layer)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hobo Horiba Aichi Prefecture Oguchi-machi, Oguchi Town, No. 1 Noda, Toyota Tokai Rika Electric Co., Ltd. (72) Inventor Takuya Otsuka 1 Toyota, Aichi Prefecture Toyota Town Toyota Auto Car Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A pair of long plate-shaped electrode layers, which are arranged opposite to each other and are bent in the thickness direction at longitudinal end portions, and a gap is formed between the electrode layers to form a gap between the electrode layers. The electrode layer is bent according to the bent shape of the bent end and extends along the longitudinal direction of the electrode layer, and in the gap, the electrode layer is allowed to be deformed from the separated position to the contact position, and the electrode layer is electrically connected at the contact position. A switch comprising: a conductive electrode interlayer insulating layer; and a coating layer that is bent according to a bent shape of a bent end portion of the electrode layer to cover an outer surface of the electrode layer.