JP6896232B2 - Pinching detection switch - Google Patents

Description

The present invention relates to a pinch detection switch for detecting pinch by a moving body such as a door that closes an opening in a vehicle such as an automobile.

Conventionally, in a moving body such as a sliding door of an automobile where a human body or its belongings may be pinched, a pinch detection switch for detecting pinching is arranged at an end on the front side in the moving direction (a pinch detection switch is arranged). For example, see Patent Document 1).

The pinch detection switch (cord switch) described in Patent Document 1 includes a cord switch main body and an attached member that functions as a bracket for fixing the cord switch main body to the slide door. The cord switch body includes a hollow tubular member having elasticity and insulation, a plurality of conductor wires arranged to face each other at intervals on the inner surface of the tubular member, and a cord cover covering the tubular member. ..

The cord cover has a tubular shape in which a hollow portion for accommodating a tubular member is formed in a central portion, and a tubular member holding a conductor wire is inserted into the hollow portion. When the cord cover collides with a pinched detection target (for example, a human body) while the sliding door is moving forward (closed direction), the conductor wires held by the tubular member come into contact with each other due to the pressure of the collision, and the conductor wires The electrical resistance between them changes. Then, the occurrence of pinching can be detected by this change in electrical resistance.

Japanese Unexamined Patent Publication No. 2014-216300

When assembling the pinch detection switch described in Patent Document 1, it is necessary to insert a tubular member into the hollow portion of the cord cover over almost the entire length, which makes this work difficult. Further, when the cord cover is sufficiently large compared to the tubular member and a large frictional force is not generated between the inner surface of the hollow portion and the outer peripheral surface of the tubular member, the tubular member should be easily inserted into the hollow portion. However, in this case, the position of the tubular member in the hollow portion becomes unstable, and there is a possibility that appropriate pinching cannot be detected.

Therefore, an object of the present invention is to provide a pinch detection switch that is easy to assemble and can appropriately detect pinch.

In order to solve the above problems, the present invention comprises a pressure-sensitive structure having at least one linear pressure-sensitive member in which a plurality of conductor wires are spirally arranged inside a tubular elastic body so as to be separated from each other. The pressure-sensitive structure includes a tubular cover member attached to an end portion on the front side in the moving direction of the moving body and formed with a hollow portion for accommodating the pressure-sensitive structure, and the pressure-sensitive structure has at least one wire. Both ends in the width direction orthogonal to the moving direction of the moving body and the stretching direction of the cover member have covering members that cover the pressure-sensitive member and face the inner surface of the hollow portion, and the at least one linear shape. Provided is a pinch detection switch in which the position of the pressure-sensitive member in the hollow portion in the width direction is defined by the covering member, and the covering member is not fixed to the cover member.

According to the pinch detection switch according to the present invention, it is easy to assemble and pinch can be detected appropriately.

It is a block diagram which shows the vehicle which is an example of the application target of the pinch detection switch which concerns on embodiment of this invention. It is sectional drawing which shows the pinch detection switch in the longitudinal direction orthogonal cross section. It is a perspective view which shows the pinch detection switch. It is a perspective view which shows one linear pressure sensitive member 31. It is a circuit diagram which shows an example of an electric circuit for detecting pinching by a sliding door by a linear pressure sensitive member together with a control device and an electric motor. It is explanatory drawing which shows the state when the detection target comes into contact with the cover member of the pinch detection switch along the moving direction of a slide door. It is explanatory drawing which shows the state when the detection object comes into contact with a cover member along the direction inclined with respect to the moving direction of a slide door. It is explanatory drawing which shows the assembly process which inserts the pressure sensitive structure into the hollow part of a cover member at the time of manufacturing a pinch detection switch. It is sectional drawing which shows the pinch detection switch which concerns on 1st modification. It is sectional drawing which shows the pinch detection switch which concerns on the 2nd modification. It is sectional drawing which shows the pinch detection switch which concerns on 3rd modification.

[Embodiment]
FIG. 1 is a schematic view showing a vehicle which is an example of an application target of a pinch detection switch (also referred to as a pinch detection sensor, a door sensor, or a door switch) according to an embodiment of the present invention.

The vehicle 1 has a vehicle body 10 and a sliding door 11 capable of opening and closing the door opening 100 formed in the vehicle body 10. The slide door 11 is guided by the upper guide rail 101 and the lower guide rail 102, and moves in the front-rear direction of the vehicle 1 by the driving force of the electric motor. When the sliding door 11 moves to the front of the vehicle 1, the door opening 100 is closed. The sliding door 11 is an aspect of the moving body of the present invention. Further, in the following description, the front of the vehicle, which is the closing direction, will be described as the front in the moving direction.

A pinch detection switch 2 is arranged so as to extend along the vertical direction of the vehicle at the end of the slide door 11 on the front side in the moving direction. When the pinch detection switch 2 comes into contact with the human body or the belongings thereof to be detected by the pinch during the closing operation of the slide door 11, the contact is detected by the control device, and the control device stops or reverses the electric motor. As a result, it is possible to prevent the detection target from being strongly sandwiched between the slide door 11 and the vehicle body 10.

FIG. 2A is a cross-sectional view showing the pinch detection switch 2 in a longitudinal orthogonal cross section. FIG. 2B is a perspective view showing the pinch detection switch 2. In FIG. 2A, the vertical direction shown corresponds to the moving direction of the slide door 11, and the front of the sliding door 11 in the moving direction is indicated by an arrow A. Hereinafter, the front in the moving direction of the slide door 11 is simply referred to as the front in the moving direction.

The pinch detection switch 2 is a cylinder in which a pressure-sensitive structure 3 having a linear pressure-sensitive member 31 and a covering member 32 covering the linear pressure-sensitive member 31 and a hollow portion 40 for accommodating the pressure-sensitive structure 3 are formed. It is provided with a shape-like cover member 4. In the present embodiment, the pressure-sensitive structure 3 has a band shape (arc shape in FIG. 2A), and is arranged over substantially the entire end portion of the slide door 11 on the front side in the moving direction. Further, in the present embodiment, the pressure-sensitive structure 3 has three linear pressure-sensitive members 31, and these three linear pressure-sensitive members 31 are sandwiched in the longitudinal direction of the detection switch 2 (cover member). 4 is arranged parallel to each other along the stretching direction). However, the number of linear pressure-sensitive members 31 in the pressure-sensitive structure 3 is not limited to three, and may be one or two, or four or more. That is, the pressure-sensitive structure 3 may have at least one linear pressure-sensitive member 31.

FIG. 3 is a perspective view showing one linear pressure sensitive member 31. The linear pressure-sensitive member 31 has a tube 311 which is a tubular elastic body, and a plurality of conductor wires 312 arranged inside the tube 311 so as to be separated from each other. More specifically, four conductor wires 312 are spirally held on the inner surface of the tube 311 with a part thereof exposed, and a space 310 having a cross section is formed in the center of the tube 311. Each conductor wire 312 is formed by coating, for example, a metal stranded wire 312a in which a plurality of metal strands are twisted with a conductive coating layer 312b. The tube 311 is made of a rubber material such as silicone rubber or ethylene propylene rubber, and has elasticity that deforms when an external force is applied and is immediately restored when the external force disappears. In a natural state where no external force is applied to the tube 311 the plurality of conductor wires 312 are held in non-contact with each other.

In the present embodiment, the covering member 32 collectively covers the three linear pressure-sensitive members 31. When the direction orthogonal to the extending direction of the cover member 4 and the moving direction of the slide door 11 is the width direction of the covering member 32, the three linear pressure-sensitive members 31 are arranged at equal intervals in this width direction. In FIG. 2A, this width direction is indicated by an arrow B. The covering member 32 is formed by molding, is curved in an arch shape so that the central portion in the width direction projects forward in the moving direction, and is housed in the hollow portion 40 of the cover member 4. That is, the pressure-sensitive structure 3 is a molded body obtained by molding the linear pressure-sensitive member 31 with the covering member 32, and in the present embodiment, the three linear pressure-sensitive members 31 are collectively combined with the covering member 32. It is being held.

In the following description, when it is necessary to distinguish each of the three linear pressure sensitive members 31 of the linear pressure sensitive member 31, the linear shape arranged in the central portion 3a in the width direction of the pressure sensitive structure 3 The pressure-sensitive member 31 will be described as a first linear pressure-sensitive member 31A, and the other two linear pressure-sensitive members 31 will be described as a second linear pressure-sensitive member 31B and a third linear pressure-sensitive member 31C. The second and third linear pressure-sensitive members 31B and 31C are arranged at both ends 3b and 3c in the width direction on both sides of the central portion 3a in the width direction of the pressure-sensitive structure 3.

The cover member 4 is provided with a base portion 41 fixed to a mounting portion 111 provided at an end portion on the front side in the moving direction of the slide door 11 and a base portion 41 provided on the front side in the moving direction with respect to the base portion 41. A cover portion 42 forming a hollow portion 40 between them and a protruding portion 43 provided so as to project from the base portion 41 toward the cover portion 42 are integrally provided. The cover member 4 and the covering member 32 are made of, for example, urethane rubber, EP rubber, silicone rubber, styrene butandien rubber, chloroprene rubber, olefin-based or styrene-based thermoplastic elastomer, urethane resin, or the like, and are subjected to contact with a detection target. It has elasticity that is deformed by pressing force.

The protrusion 43 faces the central portion 3a of the pressure-sensitive structure 3 in the width direction and the sliding door 11 in the moving direction. In other words, the central portion 3a and the protruding portion 43 in the width direction of the pressure-sensitive structure 3 are arranged in the moving direction of the slide door 11. Further, the protrusion 43 projects from the end surface 41a on the front side in the moving direction of the base portion 41 toward the cover portion 42, and is orthogonal to the cross section shown in FIG. 2A (the moving direction of the slide door 11 and the extending direction of the cover member 4). The shape in the cross section) is trapezoidal.

Hereinafter, the tip surface of the protrusion 43 in the protruding direction will be referred to as the top surface 43a, and the surfaces on both sides thereof will be referred to as the side surface 43b. The top surface 43a corresponds to the upper bottom of the trapezoidal shape, and the side surface 43b corresponds to the trapezoidal leg. The top surface 43a and both side surfaces 43b form an obtuse angle in the cross section shown in FIG. 2A. In the present embodiment, the pressure-sensitive structure 3 is curved in the hollow portion 40 so as to cover at least a part of the top surface 43a of the protrusion 43 and both side surfaces 43b.

The covering member 32 is not fixed to the cover member 4, and the movement of the covering member 32 in the hollow portion 40 is such that the widthwise end portion 321 of the covering member 32 faces the inner surface 40a of the hollow portion 40. It is regulated by. The position of the first to third linear pressure-sensitive members 31A to 31C in the hollow portion 40 in the arrow B direction (width direction of the covering member 32) is defined by the covering member 32. Of these, the first linear pressure-sensitive member 31A is positioned at a position corresponding to the front of the top surface 43a of the protrusion 43 in the moving direction.

That is, for example, even if the pressure-sensitive structure 3 receives a force in the direction in which the pressure-sensitive structure 3 moves in the width direction of the covering member 32 due to contact with the detection target of the pinching detection switch 2, the amount of movement is the end of the covering member 32 in the moving direction. It is limited by the contact between the portion 321 and the inner surface 40a of the hollow portion 40. In the present embodiment, the width direction dimensions of the covering member 32 are set so that both end portions 321 and 321 of the covering member 32 in the width direction abut on the inner surface 40a of the hollow portion 40, but the present invention is not limited to this. When the pressure-sensitive structure 3 moves to one side in the width direction of the covering member 32, the end portion 321 on the one side in the width direction of the covering member 32 comes into contact with the inner surface 40a of the hollow portion 40, and the pressure-sensitive structure 3 comes into contact with the inner surface 40a. When the covering member 32 is moved to the other side in the width direction, the end portion 321 on the other side in the width direction of the covering member 32 may come into contact with the inner surface 40a of the hollow portion 40.

However, as in the present embodiment, if both the widthwise both ends 321 and 321 of the covering member 32 are in contact with the inner surface 40a of the hollow portion 40 in normal times when pinching does not occur, the more The first linear pressure-sensitive member 31A can be accurately positioned at a position corresponding to the front of the top surface 43a of the protrusion 43 in the moving direction, and the pinching detection accuracy can be improved. The inner surface 40a of the hollow portion 40 includes an end surface 41a on the front side in the moving direction of the base portion 41 and an inner surface 42a of the cover portion 42.

FIG. 4 is a circuit diagram showing an example of an electric circuit 5 for detecting pinching by a sliding door 11 by a linear pressure-sensitive member 31 together with a control device 6 and an electric motor 7 for driving the sliding door 11. The electric circuit 5 includes four conductor wires 312 of the linear pressure-sensitive member 31, and connects the power supply 51 and the ends of two conductor wires 312 out of the four conductor wires 312. It has a resistor 52 for contact detection, an ammeter 53 connected in series with the power supply 51, and a resistor 54 for current limiting. The four conductor wires 312 are connected in series including the resistor 52. The ammeter 53 includes, for example, a current sensor such as a Hall IC and an amplifier, and its detection signal is output to the control device 6.

In the electric circuit 5 configured as described above, when the linear pressure sensitive member 31 is pressed and the conductor wires 312 come into contact with each other, electricity in the line 50 in which the four conductor wires 312 and the resistor 52 are connected in series. The resistance changes. This change in electrical resistance is detected by the control device 6 as a change in current detected by the ammeter 53, and it is recognized that the linear pressure sensitive member 31 is pressed. When the control device 6 recognizes that the linear pressure sensitive member 31 is pressed during the closing operation of the slide door 11, the electric motor 7 is stopped or reversed.

Note that FIG. 4 shows only the electric circuit 5 corresponding to one linear pressure-sensitive member 31, but in the present embodiment, the pressure-sensitive structure 3 has three linear pressure-sensitive members 31. Therefore, an electric circuit 5 is provided corresponding to each of these linear pressure-sensitive members 31, and a detection signal of the ammeter 53 of each electric circuit 5 is output to the control device 6. When the control device 6 recognizes that any of the linear pressure sensitive members 31 has been pressed, the control device 6 stops or reverses the electric motor 7.

FIG. 5 is an explanatory view showing a state when the detection target comes into contact with the cover member 4 of the pinch detection switch 2 along the moving direction of the slide door 11. In FIG. 5, the direction of the pressure acting on the pinch detection switch 2 is indicated by an arrow C. In this case, the first linear pressure-sensitive member 31A is sandwiched between the top surface 43a of the protrusion 43 and the inner surface 42a of the cover portion 42, and the conductor wires 312 of the first linear pressure-sensitive member 31A are connected to each other. Make contact (short circuit). Then, the occurrence of pinching by the slide door 11 is detected by the first linear pressure-sensitive member 31A.

FIG. 6 is an explanatory view showing a state when the detection target comes into contact with the cover member 4 along a direction inclined with respect to the moving direction of the slide door 11. In such a contact state (a case that cannot be detected as shown in FIG. 5), for example, an item carried by a person outside the vehicle 1 (for example, a pass case with a string) is left behind inside the slide door 11, and that person is left behind. Can occur when pulling from outside the vehicle. In FIG. 6, the direction of the pressure acting on the pinch detection switch 2 is indicated by an arrow D. In this illustrated example, the second linear pressure sensitive member 31B is sandwiched between the side surface 43b of the protrusion 43 and the inner surface 42a of the cover portion 42, and the conductor wires 312 are in contact (short circuit) with each other. Then, the pinching by the slide door 11 is detected by the second linear pressure-sensitive member 31B.

Although not shown, the detection target contacts the cover member 4 along a direction inclined in the direction opposite to the moving direction of the slide door 11 (direction of arrow E indicated by a two-dot chain line in FIG. 6). In this case, the conductor wires 312 of the third linear pressure sensitive member 31C come into contact with each other (short circuit).

FIG. 7 is an explanatory view showing an assembly process of inserting the pressure-sensitive structure 3 into the hollow portion 40 of the cover member 4 at the time of manufacturing the pinch detection switch 2. In FIG. 7, the insertion direction of the pressure-sensitive structure 3 is indicated by an arrow F.

In the pressure-sensitive structure 3, the covering member 32 has a flat plate shape in a natural state before being accommodated in the hollow portion 40 of the cover member 4. Then, the pressure-sensitive structure 3 is inserted into the hollow portion 40 while elastically deforming the covering member 32 and bending it into a bow shape. Due to the restoring force of the covering member 32, both end portions 321 and 321 in the width direction come into contact (bullet contact) with the inner surface 40a of the hollow portion 40, and are inserted into the hollow portion 40 while sliding the inner surface 40a. In order to suppress the sliding resistance at this time, it is preferable to apply a lubricant to the surface of the covering member 32 that is in sliding contact with the inner surface 40a of the hollow portion 40.

(Modification example)
8 to 10 are cross-sectional views showing the sandwiching detection switches 2A to 2C according to the modified example of the embodiment. 8 to 10, the components common to those described in the above-described embodiment are designated by the same reference numerals as those used in FIGS. 2A and the like, and duplicated description will be omitted.

The first modification shown in FIG. 8 is a modification in the case where the pressure-sensitive structure 3 has only one linear pressure-sensitive member 31. In this case, the one linear pressure sensitive member 31 is arranged on the front side in the moving direction of the protrusion 43 of the cover member 4. In this configuration, as compared with the above embodiment, when the detection target comes into contact with the cover member 4 along the direction inclined with respect to the moving direction of the slide door 11, the pinching detection accuracy is lowered, but the most. It is possible to reliably detect the occurrence of pinching in the direction along the moving direction of the slide door 11, which frequently occurs.

The second modification shown in FIG. 9 is a modification when the pressure-sensitive structure 3 has two linear pressure-sensitive members 31. In this case, the two linear pressure-sensitive members 31 are arranged on the front side in the moving direction of the corners of the top surface 43a and the side surface 43b of the protrusion 43 of the cover member 4. In this configuration, as compared with the above embodiment, the number of linear pressure sensitive members 31 is reduced to reduce the cost, while sandwiching in the direction along the moving direction of the slide door 11 and moving the slide door 11. It is possible to detect pinching in a direction inclined with respect to the direction.

In the third modification shown in FIG. 10, the pressure-sensitive structure 3 has only one linear pressure-sensitive member 31, and the protrusion 44 protruding toward the one linear pressure-sensitive member 31 covers the pressure-sensitive structure 3. It is provided so as to project from the cover portion 42 of the member 4 to the rear side in the moving direction of the slide door 11. The covering member 32 maintains a flat plate shape and faces the end surface 41a on the front side in the moving direction of the base portion 41, and there is a slight gap between both end portions 321 and 321 in the width direction and the inner surface 42a of the cover portion 42. Each is formed. The movement of the covering member 32 in the width direction is caused by the inner surface of the cover portion 42 in which the gap is closed and any end portion 321 of both end portions 321 and 321 of the covering member 32 is a part of the inner surface 40a of the hollow portion 40. It is limited by abutting on 42a. As a result, the position of the linear pressure-sensitive member 31 is defined on the rear side of the protrusion 44 in the moving direction.

(Actions and effects of embodiments)
According to the above-described embodiment and its modification, the covering member 32 is interposed between the linear pressure-sensitive member 31 and the inner surface 40a of the hollow portion 40 in the cover member 4, and the covering member 32 gives a linear feeling. The position of the pressure member 31 is defined. Further, when the pressure-sensitive structure 3 is inserted into the hollow portion 40 of the cover member 4 at the time of manufacturing the pinch detection switch 2, the rigidity of the pressure-sensitive structure 3 in the insertion direction is ensured by the covering member 32. At the same time, since the ratio of the area of the outer surface of the covering member 32 in contact with the inner surface 40a of the hollow portion 40 is limited, this work can be easily performed. As a result, it is easy to assemble and it is possible to appropriately detect pinching.

(Summary of embodiments)
Next, the technical idea grasped from the above-described embodiment will be described with reference to the reference numerals and the like in the embodiment. However, each reference numeral in the following description is not limited to the member or the like in which the components in the claims are specifically shown in the embodiment.

[1] A pressure-sensitive structure (3) having at least one linear pressure-sensitive member (31) in which a plurality of conductor wires (312) are arranged inside a tubular elastic body so as to be separated from each other, and a moving body. (Slide door 11) is provided with a tubular cover member (4) attached to an end portion on the front side in the moving direction and having a hollow portion (40) for accommodating the pressure-sensitive structure (3). The pressure-sensitive structure (3) covers at least one linear pressure-sensitive member (31), and has a width direction orthogonal to the moving direction of the moving body (11) and the stretching direction of the cover member (4). Both ends (321, 321) of the hollow portion (40) have a covering member (42) facing the inner surface (42a) of the hollow portion (40), and the hollow portion (40) of the at least one linear pressure sensitive member (31). ), The pinch detection switch (2) whose position in the width direction is defined by the covering member (42).

[2] The at least one linear pressure-sensitive member (31) is arranged at the central portion (3a) of the pressure-sensitive structure (31) in the width direction, and the cover member (4) has the pressure-sensitive structure. The pinch detection switch (2) according to the above [1], which has a protrusion (43/44) facing the moving direction of the moving body (11) and the central portion (3a) of the body (3).

[3] The pressure-sensitive structure (3) includes three linear pressure-sensitive members (31), and one of the three linear pressure-sensitive members (31) is a linear pressure-sensitive member (31A). ) Is arranged in the central portion (3a), and the other two linear pressure-sensitive members (31) are arranged on both sides of the central portion (3a) in the width direction. Detection switch (2).

[4] The cover member (4) is provided on the base portion (41) fixed to the moving body (11) and on the front side of the moving body (11) in the moving direction with respect to the base portion (41). The cover member (4) that forms the hollow portion (40) is provided between the base portion (41) and the base portion (41), and the protrusion portion (43) is formed from the base portion (41) to the cover portion (42). ), And when the pinching detection target comes into contact with the cover member (4) along the moving direction of the moving body (11), the line arranged in the central portion (3a). The pressure-sensitive member (31) is sandwiched between the top surface (43a) of the protrusion (43) and the inner surface (42a) of the cover portion (42), and the detection target of the sandwiching is the moving body (11). ) When contacting the cover member (4) along a direction inclined with respect to the moving direction, the two linear pressure-sensitive members (31B,) arranged on both sides of the central portion (3a) in the width direction. 31C), any of the linear pressure sensitive members (31B, 31C) is sandwiched between the side surface (43a) of the protrusion (43) and the inner surface (42a) of the cover portion (42). 3] The pinch detection switch (2).

[5] The pressure-sensitive structure (3) is curved so as to cover at least a part of the top surface (43a) and the side surface (43b) of the protrusion (43) in the hollow portion (40). The pinch detection switch (2) according to the above [4].

[6] In the pressure-sensitive structure (3), in normal times when the pinching does not occur, both the both end portions (321, 321) of the covering member (32) are the inner surfaces (40) of the hollow portion (40). The pinch detection switch (2) according to any one of the above [1] to [5], which is in contact with 40a).

[7] The pressure-sensitive structure (3) is a molded body obtained by molding the at least one linear pressure-sensitive member (31) with the covering member (32). The pinch detection switch (2) described in any one of them.

Although the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. It should also be noted that not all combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

In addition, the present invention can be appropriately modified and implemented without departing from the spirit of the present invention. For example, in the above embodiment, the case where the covering member 32 is flat in the natural state before being accommodated in the hollow portion 40 of the cover member 4 has been described, but the covering member 32 is molded into a curved shape. You may. Further, the shape of the covering member 32 in the natural state is not limited to a flat plate shape, and may be, for example, a U-shape or a V-shape that is convex toward the front side in the moving direction or the rear side in the moving direction.

Further, the pressure-sensitive structure (3) may have a structure in which a single or a plurality of linear pressure-sensitive members (31) are arranged in parallel on the adhesive surface side of the wide tape and then sandwiched between other wide tapes. That is, it is a pressure-sensitive structure in which a single or a plurality of linear pressure-sensitive members (31) are arranged between the two tapes. In this case, the outer surface shape of the pressure-sensitive structure is not elliptical as shown in FIG. 7, but only the portion of the linear pressure-sensitive member (31) is convex, and a plurality of linear pressure-sensitive members ( When 31) is arranged, it becomes a pressure-sensitive structure having a wavy outer surface shape.

With this configuration, the pressure-sensitive structure can have a thick portion in which the linear pressure-sensitive member is arranged and a non-thick portion in which the linear pressure-sensitive member is not arranged in a cross-sectional view. This non-thick part, that is, the part where the pressure-sensitive structure is thin is easily deformed. That is, this ease of deformation contributes to the ease of manufacturing the pinch detection switch.

Further, with respect to the pressure-sensitive structure (3) having a plurality of linear pressure-sensitive members (31), a notch (groove) is formed in the covering member (32) between the linear pressure-sensitive members in a shape along the linear pressure-sensitive member. ) May be included. With this configuration, the pressure-sensitive structure can have a thick portion in which the linear pressure-sensitive member is arranged and a non-thick portion between the linear pressure-sensitive members in a cross-sectional view. The non-thick part, that is, the part where the pressure-sensitive structure is thin is easily deformed. That is, this ease of deformation contributes to the ease of manufacturing the pinch detection switch.

11 ... Sliding door (moving body) 2 ... Pinching detection switch 3 ... Pressure-sensitive structure 31 ... Linear pressure-sensitive member 311 ... Tube (tubular elastic body) 312 ... Conductor wire 32 ... Covering member 321 ... End 4 ... Cover Member 40 ... Hollow portion 40a ... Inner surface 41 ... Base portion 42 ... Cover portion 42a ... Inner surface 43, 44 ... Protrusion portion 43a ... Top surface 43b ... Side surface

Claims (5)

A pressure-sensitive structure having at least one linear pressure-sensitive member in which a plurality of conductor wires are spirally arranged inside a tubular elastic body so as to be separated from each other.
A tubular cover member attached to an end portion on the front side in the moving direction of the moving body and having a hollow portion for accommodating the pressure-sensitive structure is provided.
The pressure-sensitive structure covers at least one linear pressure-sensitive member, and both ends in the width direction orthogonal to the moving direction of the moving body and the extending direction of the cover member face the inner surface of the hollow portion. Has a covering member
The position of the at least one linear pressure-sensitive member in the hollow portion in the width direction is defined by the covering member.
The covering member is not fixed to the cover member and is not fixed.
The movement of the covering member in the hollow portion is restricted by the widthwise end of the covering member facing the inner surface of the hollow portion.
The pressing force of the detection contact of the object to the cover member, the inner surface of the hollow portion of the cover member is configured to contact the cover member,
The at least one linear pressure-sensitive member is arranged at the center of the pressure-sensitive structure in the width direction.
The cover member has a protrusion facing the central portion of the pressure-sensitive structure and the moving direction of the moving body.
Pinching detection switch. The pressure-sensitive structure includes three linear pressure-sensitive members, and one of the three linear pressure-sensitive members has one linear pressure-sensitive member in the central portion and two other linear pressure-sensitive members. Members are arranged on both sides of the central portion in the width direction, respectively.
The pinch detection switch according to claim 1. The cover member includes a base portion fixed to the moving body and a cover portion provided on the front side of the moving body in the moving direction and forming the hollow portion between the base portion and the base portion. Have and
The protrusion is provided so as to project from the base portion toward the cover portion.
When the front danger out target is in contact with the cover member along the moving direction of the movable body, the top surface of the linear pressure sensing member arranged in the central portion the projection and the inner surface of the cover portion Sandwiched between
Before when dangerous out target is in contact with the cover member along a direction inclined with respect to the moving direction of the moving body, wherein arranged on both sides in the width direction the said two linear pressure sensing member of the central portion One of the linear pressure-sensitive members is sandwiched between the side surface of the protrusion and the inner surface of the cover.
The pinch detection switch according to claim 2. The pressure-sensitive structure is curved in the hollow portion so as to cover at least a part of the top surface and the side surface of the protrusion.
The pinch detection switch according to claim 3. The pressure-sensitive structure is a molded body obtained by molding the at least one linear pressure-sensitive member with the covering member.
The pinch detection switch according to any one of claims 1 to 4.

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