JP5123035B2 - Pressure detection switch - Google Patents

Description

  The present invention relates to a pressure detection switch that is formed in a cable shape and detects contact of an object to be detected.

  2. Description of the Related Art Conventionally, some vehicles such as automobiles include an automatic opening / closing device that automatically opens and closes an opening / closing body such as a slide door or a sunroof provided in the vehicle. The automatic opening / closing device includes an electric motor driven by an operation switch provided in a vehicle interior or the like, and opens / closes the opening / closing body by rotationally driving the electric motor by the operation switch.

  The automatic opening / closing device is provided with a pinching prevention function in order to prevent an obstacle (detected object) from being pinched by an opening / closing body that automatically opens and closes. The automatic switchgear is provided with a pressure detection switch that detects the contact of an obstacle. When the pressure is detected by the pressure detection switch, that is, when the contact of the obstacle is detected, the rotation drive of the electric motor is stopped or reversed. Like to do. Thereby, it is possible to prevent an obstacle from being caught by the opening / closing body.

  The pressure detection switch is formed in a cable shape and is attached to the end of the opening / closing body or the end of the opening. As a technique provided with such a pressure detection switch, for example, one described in Patent Document 1 is known.

  A pressure-sensitive sensor (pressure detection switch) described in Patent Document 1 includes an insulating elastically deformable hollow outer skin part and a plurality of electrodes that can contact each other when the outer skin part is elastically deformed inside the outer skin part Wire (conductor). When the outer skin part is elastically deformed by an obstacle coming into contact with the outer skin part, the electrode wires provided on the inner side thereof are contacted with each other and short-circuited, and the contact of the obstacle is detected by detecting this short circuit. It can be detected.

Of the both ends of the pressure-sensitive sensor, each electrode wire is folded back through a conductive piece on one side, and a resistor, a cord and the like are electrically connected on the other side. One side of the pressure sensor is provided with a support member for supporting the conductive piece and each electrode wire, and a cap-shaped seal portion covering the support member, and on the other side, an end portion of each electrode wire, a resistance, A support member that supports a cord and the like and a cap-shaped seal member that covers the support member are provided. Each support member has a dedicated shape that is different on one side and the other side of the pressure sensor, and the seal portion follows the shape of the support member on one side and the other side of the pressure sensor. Then, it is formed by molding a synthetic resin material.
Japanese Patent No. 3354506 (FIGS. 1 and 5)

  However, according to the pressure sensor described in Patent Document 1 described above, the shape of the support member is different between the one side and the other side of the pressure sensor, and one side and the other side when molding the synthetic resin material. It is necessary to use different molds. Therefore, the number of parts constituting the pressure sensor and the number of molds used for molding the pressure sensor are increased, and there is a problem that an increase in manufacturing cost cannot be avoided. Further, when assembling the pressure sensitive sensor, there is a possibility that the number of assembling steps may be complicated, for example, a measure for preventing erroneous assembly of each electrode wire on the other side of the pressure sensitive sensor is required.

  An object of the present invention is to provide a pressure detection switch capable of sharing parts provided in a terminal and simplifying wiring work of each conductor.

The pressure detection switch according to the present invention is a pressure detection switch that is formed in a cable shape and detects contact of an object to be detected, and has flexibility with an outer electrode formed in a tubular shape by a flexible conductor. An inner electrode that is linearly formed by a conductor and is disposed inside the outer electrode, and an insulator that is disposed between the outer electrode and the inner electrode, and is formed between the outer electrode and the inner electrode. A spacer member that forms a gap therebetween, a spiral conductor provided inside the outer electrode, an outer conductor electrically connected to the outer electrode, and an axial center provided in the inner electrode; An inner conductor that is electrically connected to the inner electrode, and a pair of terminal members that are respectively provided on both ends of the outer electrode and the inner electrode and are formed of an insulator. Of the above A pair of a gap holding portion that is disposed in a portion excluding the pacer member and that is provided integrally with the gap holding portion and that holds the gap, and the ends of the outer conductor and the inner conductor are electrically connected to each other. The gap holding portion is formed in a cutout shape with a part cut away so as to have an opening, the inner electrode is mounted inside the gap holding portion, and the opening The spacer member is arranged on the side .

  In the pressure detection switch of the present invention, the main body is formed in a flat plate shape, and the conductive members are provided side by side on one side surface of the main body.

  The pressure detection switch according to the present invention is characterized in that the main body is formed in a flat plate shape, and the conductive members are provided on both side surfaces of the main body.

  The pressure detection switch according to the present invention is characterized in that the spacer member is spirally arranged on the surface of the inner electrode.

  According to the present invention, since the outer conductor and the inner conductor are provided inside each of the outer electrode and the inner electrode, the end of each conductor can be easily identified, and the outer conductor and the inner conductor are wired. The work can be simplified. In addition, a spacer member is provided between the outer electrode and the inner electrode, a pair of terminal members are provided on both ends of each electrode, the terminal member is disposed in a portion excluding the spacer member, and an outer conductor. And the end portion of the inner conductor are respectively formed from a body portion having a pair of electrically conductive members to which they are electrically connected, so that each terminal member is made common and one end member is used for resistance connection, and the other end The members can be divided into functions such as cord connection.

  According to the present invention, the gap holding part is formed in a cutout shape with a cutout so as to have an opening, and the inner electrode is mounted on the inner side of the gap holding part, and the spacer member is disposed on the opening side. The periphery of both ends of the inner electrode can be covered with a spacer member made of an insulator and a gap holding portion. Therefore, it is possible to reliably prevent contact between the electrodes at both ends, and to improve the product yield.

  According to the present invention, the main body is formed in a flat plate shape, and each conductive member is provided side by side on one side of the main body, so that connection work such as resistance and cord can be easily performed, and assembly workability is improved. Can be planned.

  According to the present invention, since the main body is formed in a flat plate shape and each conductive member is provided on both side surfaces of the main body, the area of a portion to which a resistor, a cord, or the like is connected can be increased. Therefore, it becomes possible to connect other electronic components and the like, and it becomes possible to achieve multi-functionality (performance improvement) of the pressure detection switch.

  According to the present invention, since the spacer member is spirally arranged on the surface of the inner electrode, the radial dimension of the gap can be made substantially uniform at each position in the longitudinal direction and the circumferential direction of the pressure detection switch. it can.

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.

  1 is a side view showing a one-box type vehicle, FIG. 2 is a plan view showing an automatic opening / closing device equipped with a pressure detection switch according to the present invention, and FIG. 3 is a control system of the automatic opening / closing device of FIG. FIG.

  As shown in FIG. 1, the vehicle 10 is a one-box type passenger vehicle, and an opening 12 a is provided in a side portion 12 of a vehicle body 11 that forms the vehicle 10. The opening 12a is opened and closed by a sliding door 13 as an opening / closing body that slides in the front-rear direction of the vehicle body 11 as indicated by a two-dot chain arrow in the figure.

  As shown in FIG. 2, the slide door 13 is provided with a roller assembly 14, and the roller assembly 14 is guided by a guide rail 15 fixed to the side portion 12 of the vehicle body 11. It slides between a fully open position indicated by a solid line in the figure and a fully closed position indicated by a two-dot chain line. A curved portion 15a that curves toward the vehicle interior side (upper side in the figure) is provided on the vehicle body front side of the guide rail 15, and the roller door 14 is guided by the curved portion 15a. It is closed in a state where it is drawn inside the vehicle body 11 so as to be in the same plane as the side portion 12 of the vehicle body 11.

  Here, although not shown, the roller assembly 14 is also provided in the upper and lower portions of the front end portion of the slide door 13 in addition to the portion shown in the drawing, and correspondingly to the upper and lower portions of the opening 12a of the vehicle body 11, respectively. Guide rails are provided. Thus, the sliding door 13 is supported by the vehicle body 11 at a total of three locations, and thus the sliding door 13 can stably slide.

  As shown in FIG. 2, an automatic opening / closing device 20 that automatically opens and closes the sliding door 13 is mounted on the vehicle body 11. The automatic opening / closing device 20 includes a drive unit 21 that is fixed to the vehicle body 11 adjacent to a substantially central portion of the guide rail 15 in the vehicle longitudinal direction. Cables 22a and 22b are drawn from the drive unit 21 toward the front and rear sides of the vehicle body. A cable 22a drawn from the drive unit 21 to the front side of the vehicle body is connected to the roller assembly 14 from the front side of the vehicle body via a reversing pulley 23a provided on the front end side of the guide rail 15, and is drawn to the rear side of the vehicle body. 22 b is connected to the roller assembly 14 from the rear side of the vehicle body via a reversing pulley 23 b provided on the rear end side of the guide rail 15.

  The drive unit 21 drives the cables 22a and 22b. When the cables 22a and 22b are driven by the drive unit 21, the slide door 13 is pulled by the cables 22a and 22b on the vehicle body front side or rear side. It opens and closes automatically. That is, the automatic opening / closing device 20 is a so-called cable type.

  As shown in FIG. 3, the drive unit 21 has an electric motor 24 as a drive source and a speed reducer 25 fixed to the electric motor 24, and the rotation of the electric motor 24 is predetermined by the speed reducer 25. It is decelerated to the number of rotations and is output from the output shaft 26. Here, as the electric motor 24, a motor that can rotate in both forward and reverse directions, such as a brushed DC motor or a brushless DC motor, is used.

  A drum 27 formed in a cylindrical shape is fixed to the output shaft 26, and the cables 22 a and 22 b are wound around the outer peripheral surface of the drum 27 a plurality of times. As a result, when the electric motor 24 rotates in the forward direction, the drum 27 rotates in the clockwise direction in the drawing, the cable 22a on the closing side is wound around the drum 27, and the slide door 13 is pulled by the cable 22a to perform the closing operation. On the contrary, when the electric motor 24 rotates in the reverse direction, the drum 27 rotates counterclockwise in the drawing, the open cable 22b is wound around the drum 27, and the slide door 13 is pulled by the cable 22b and opened. Operate.

  An electromagnetic clutch (not shown) is provided inside the speed reducer 25. The electromagnetic clutch cuts off the power transmission path between the electric motor 24 and the output shaft 26 when the slide door 13 is manually opened / closed to reduce the opening / closing operation force of the slide door 13. . Between the drum 27 and the slide door 13, a tensioner mechanism (not shown) for applying a predetermined tension to each cable 22a, 22b is provided. The tensioner mechanism is caused by long-term use of the automatic opening / closing device 20. The extension of each cable 22a, 22b is absorbed.

  A multipolar magnetized magnet 28 having a large number of magnetic poles magnetized in the circumferential direction is fixed to the output shaft 26, and two holes are provided in the vicinity of the multipolar magnetized magnet 28 with a predetermined phase difference therebetween. ICs 29a and 29b are arranged. When the output shaft 26 rotates, a pulse signal having a period proportional to the rotation speed of the output shaft 26 is output from each Hall IC 29a, 29b.

  The automatic opening / closing device 20 includes a control device 30 that controls the rotational drive of the electric motor 24. The control device 30 has a function as a so-called microcomputer having a microprocessor (CPU), a memory such as a ROM and a RAM (not shown), and is electrically connected to the electric motor 24 via wiring. .

  Each Hall IC 29a, 29b is connected to the control device 30, and the control device 30 moves the rotational speed of the output shaft 26, that is, the movement of the slide door 13, based on the period of the pulse signal input from each Hall IC 29a, 29b. The speed can be detected. Further, the control device 30 detects the rotation direction of the output shaft 26, that is, the moving direction of the slide door 13 based on the appearance timing of these pulse signals, and further, the slide door 13 is in a reference position (for example, a fully closed position). The opening / closing position of the slide door 13 can be detected by counting the pulse signal starting from the time when the slide door 13 is located.

  The slide door 13 is provided with a door handle 31, and the door handle 31 has a function as an opening / closing switch for opening and closing the slide door 13. When the operator operates the door handle 31, an opening / closing command signal is input from the door handle 31 to the control device 30, and the control device 30 stores the input opening / closing command signal, the opening / closing position, opening / closing speed, etc. of the slide door 13. The calculation is performed according to the control program stored therein, and the rotational drive control of the electric motor 24 is executed based on the calculation result. For example, when the door handle 31 is closed and a command signal for closing the slide door 13 is input to the control device 30, the electric motor 24 is rotated forward by the control device 30 and the slide door 13 is closed. In contrast, when the door handle 31 is opened and a command signal for opening the slide door 13 is input to the control device 30, the electric motor 24 is reversed by the control device 30 and the slide door 13 is opened. To do.

  A sensor unit 40 is attached to the front side of the vehicle body of the slide door 13, that is, the end portion that becomes the traveling direction side when the slide door 13 is closed. The sensor unit 40 detects contact between the slide door 13 and the obstacle DA (see FIG. 1) as an object to be detected, and pinching of the obstacle DA by the slide door 13 due to the contact.

  4 (a) and 4 (b) are explanatory views for explaining the mounting state of the sensor unit, FIGS. 5 (a) and 5 (b) are sectional views for explaining the detailed structure of the pressure detection switch, and FIG. 6 is a terminal member. 7 (a), (b), and (c) are explanatory diagrams for explaining the detailed structure of the terminal member, and FIG. 8 is a circuit diagram of the pressure detection switch.

  As shown in FIG. 4A, the sensor unit 40 includes a sensor holder 41 formed of rubber that is a flexible insulator. The sensor holder 41 is fixed so that a bracket 42 provided on the slide door 13 is sandwiched between the sensor holders 41, and a tip portion of the sensor holder 41 protrudes further forward of the vehicle body than an end portion of the slide door 13.

  A mounting hole 41 a penetrating in the vertical direction of the vehicle body is formed in a portion of the sensor holder 41 that protrudes toward the front side of the vehicle body from the end portion of the slide door 13. A pressure detection switch 50 formed in a long cable shape is mounted in the mounting hole 41a. However, as a method of attaching the sensor unit 40 to the slide door 13, as shown in FIG. 4B, the sensor holder 41 may be directly fixed to the distal end side of the slide door 13.

  As shown in FIG. 5, the pressure detection switch 50 includes an outer electrode 51 and an inner electrode 52. The outer electrode 51 is formed in a tubular shape (tube shape) by a flexible conductor such as conductive rubber (ethylene-propylene-diene rubber (EPDM)), and the inside is hollow. The inner electrode 52 is formed in a solid line shape by a flexible conductor such as conductive rubber like the outer electrode 51, and is coaxial with the outer electrode 51 on the inner side (hollow part) of the outer electrode 51. It is arranged to be.

  Between the outer electrode 51 and the inner electrode 52, for example, one spacer member 53 formed of an insulator such as rubber is provided so as to route the surface of the inner electrode 52 in a spiral shape. A gap S is formed between the outer electrode 51 and the inner electrode 52 by the member 53. By providing the spacer member 53 in a spiral shape between the outer electrode 51 and the inner electrode 52, the radial dimension of the gap S is made substantially uniform at each position in the longitudinal direction and the circumferential direction of the pressure detection switch 50. ing. Thereby, in a normal state where no external force is applied, the outer electrode 51 and the inner electrode 52 are electrically insulated from each other by the spacer member 53.

  Inside the outer electrode 51, one outer conducting wire 54 is provided in a spiral shape, and this outer conducting wire 54 is electrically connected to the outer electrode 51. An inner conductor 55 is provided along the axis of the inner electrode 52, and the inner conductor 55 is electrically connected to the inner electrode 52. Then, as indicated by a two-dot chain arrow in the figure, when the external force F is applied to the outer electrode 51 and the outer electrode 51 is elastically deformed, the inner wall of the outer electrode 51 comes into contact with the outer wall of the inner electrode 52. Thereby, the outer conductor 54 is short-circuited to the inner conductor 55 via the outer electrode 51 and the inner electrode 52.

  Here, as shown in FIG. 5A, the outer conductive wire 54 is disposed on the opposite side of the spacer member 53 with the inner electrode 52 interposed therebetween, and the outer portion is disposed at the intermediate portion between the pitches of the spacer member 53 as shown in FIG. Although the conductor 54 is shown, the arrangement relationship of the outer conductor 54 with respect to the spacer member 53 is arbitrary. That is, the spacer member 53 can be assembled to the outer electrode 51 without worrying about the position of the outer conductor 54, and the outer conductor 54 and the inner conductor 55 are short-circuited regardless of the arrangement relationship. be able to.

  As shown in FIG. 6, a pair of terminal members 60 formed in the same shape are provided on both ends of the electrode assembly EA composed of the outer electrode 51, the inner electrode 52, and the spacer member 53. In the drawing, only one side in the longitudinal direction of the electrode assembly EA is shown.

  The terminal member 60 includes an arm part 61 and a main body part 62 as shown in FIGS. 6 and 7, and the terminal member 60 is formed in a predetermined shape by a resin material (insulator) such as plastic. FIG. 7B shows a view taken in the direction of arrow A in FIG. 7A, and FIG. 7C shows a view taken in the direction of arrow B in FIG. 7A.

  A gap holding portion 61a is provided on the distal end side of the arm portion 61. The gap holding portion 61a is formed in a cutout shape partially cut along the circumferential direction of the electrode assembly EA, and the cross-sectional shape thereof is approximately. It has a U shape. The gap holding portion 61a is provided with an opening 61b, and the gap holding portion 61a moves the spacer member 53 in the gap S of the electrode assembly EA with the opening 61b facing the spacer member 53 side. It is arranged in the excluded part. Thereby, the spacer member 53 is arrange | positioned at the opening part 61b side of the clearance gap holding part 61a.

  The gap holding portion 61a is configured to hold a gap (gap S) between the outer electrode 51 and the inner electrode 52, and is mounted so that the inner electrode 52 is in contact with the inner side of the gap holding portion 61a. An outer electrode 51 is provided outside the 61a so as to be in partial contact. The gap holding portion 61a comes into contact with both the outer electrode 51 and the inner electrode 52, and is attached to the electrode assembly EA by being press-fitted toward the gap S from the axial direction of the electrode assembly EA.

  A flat plate-like main body portion 62 is integrally provided on the proximal end side of the gap holding portion 61a via a bridging portion 61c, and the main body portion 62 is formed in a substantially rectangular shape. A pair of conductive members 63 and 64 are fixed to one side surface of the main body portion 62, that is, the surface portion 62 a on the opening 61 b side of the gap holding portion 61 a along the longitudinal direction of the main body portion 62. Each conductive member 63, 64 is formed in a predetermined shape by a thin copper plate or the like as a conductor, and each conductive member 63, 64 is provided side by side on the surface portion 62a so as not to contact each other. Yes.

  The respective conductive members 63 and 64 are electrically connected to the distal ends of the respective conductive wires 54 and 55 extending from the end portions of the electrodes 51 and 52 by soldering (solder portion P). However, the connection of the conductive wires 54 and 55 to the conductive members 63 and 64 is not limited to soldering, and may be, for example, spot welding. In short, any form may be used as long as it is an adhesive means that can electrically connect the conductive wires 54 and 55 and the conductive members 63 and 64.

  A resistor 70 and wiring cords 71 and 72 (see FIG. 8) are electrically connected to the longitudinal ends (right side in the drawing) of the conductive members 63 and 64, as indicated by a two-dot chain circle in the drawing. Connection points CP1 and CP2 are provided. Here, the connection points of the conductive wires 54 and 55 to the conductive members 63 and 64 are arranged on the electrode assembly EA side of the conductive members 63 and 64 in order to secure the connection points CP1 and CP2 having as large an area as possible. To be located. By doing so, the connection work of the resistor 70 and the wiring cords 71 and 72 to the conductive members 63 and 64 can be easily performed.

  As shown in FIG. 8, a resistor 70, which is an electronic component, is electrically connected to each conductive member 63, 64 of the terminal member 60 (upper side in the figure) across one conductive member 63, 64. It is connected. Further, the other end of the wiring cord 71 whose one end is grounded to the vehicle body 11 is electrically connected to the conductive member 63 on the other end member 60 (lower side in the drawing), and the other end member 60 is electrically conductive. The other end side of the wiring cord 72 whose one end side is connected to the control device 30 is electrically connected to the member 64. Here, the connection to the conductive members 63 and 64 on the other end side of the resistor 70 and the wiring cords 71 and 72 is soldered (soldering) similarly to the connection of the conductive wires 54 and 55 to the conductive members 63 and 64. Part P) is employed.

  In a normal state in which the conductors 54 and 55 are not short-circuited, the control device 30 detects a normal current (small current) passing through the resistor 70, and if there is no contact with the obstacle DA (see FIG. 1). It comes to judge. On the other hand, when each of the conducting wires 54 and 55 is short-circuited, the control device 30 detects a short-circuit current (large current), thereby determining that there is a contact with the obstacle DA.

  As described above, the control device 30 determines the contact of the obstacle DA by detecting the normal current and the short-circuit current. When the normal current is detected, the control device 30 rotates the electric motor 24 as usual. When the sliding door 13 is driven to open and close and a short-circuit current is detected, the electric motor 24 is stopped or reversely driven to prevent the obstacle DA from being caught by the sliding door 13.

  Next, the procedure for assembling the terminal member 60 to the electrode assembly EA will be described in detail with reference to the drawings. In addition, it is assembled in the same procedure at the end (not shown) on the opposite side of the electrode assembly EA.

  FIGS. 9A, 9B, and 9C are explanatory diagrams for explaining the procedure for assembling the terminal member, and FIGS. 10A and 10B are explanatory diagrams for explaining the connection state of the resistor and the cord. ing.

  As shown in FIG. 9A, first, an electrode assembly EA in which the electrodes 51 and 52 and the spacer member 53 are assembled in a separate process is prepared. Next, the conductive wires 54 and 55 extended from the electrode assembly EA are made to be substantially straight in the axial direction of the electrode assembly EA, and the gap holding portion 61a of the terminal member 60 is formed under this state. Let it face the electrode assembly EA. Thereafter, as shown by an arrow in the figure, the terminal member 60 is moved relative to the electrode assembly EA.

  As shown in FIG. 9B, the terminal member 60 is continuously moved with respect to the electrode assembly EA, and the inner electrode 52 is mounted inside the gap holding portion 61a, and the gap holding portion 61a is press-fitted into the gap S. I will do it. At this time, the opening 61b faces the spacer member 53 side. The press-fitting amount (insertion amount) of the gap holding portion 61a into the electrode assembly EA is an amount that the gap holding portion 61a completely enters the electrode assembly EA.

  Thereafter, as shown in FIG. 9 (c), the heating tool T such as a soldering iron is used to electrically connect the leading ends of the conductive wires 54 and 55 to the corresponding conductive members 63 and 64, respectively. Next, as shown by a two-dot chain line in the figure, a thin metal ring MR formed in a cylindrical shape is attached to a predetermined portion of the electrode assembly EA corresponding to the gap holding portion 61a. Thereafter, using a tool such as pliers (not shown), the metal ring MR is tightened and deformed at a predetermined pressure f as shown by a two-dot chain line arrow in the drawing, whereby the terminal member 60 is assembled to the electrode assembly EA ( Caulking is completed.

  Although the metal ring MR is tightened and fixed by caulking, since the spacer member 53 that is an insulator and the gap holding portion 61a are provided around the inner electrode 52, the electrodes 51 and 52 come into contact with each other. There is no such thing. Here, when the pull-out strength due to the press-fitting of the gap holding portion 61a into the electrode assembly EA is sufficient, the caulking and fixing by the metal ring MR can be omitted. Further, regardless of the caulking and fixing of the metal ring MR, for example, a ring-shaped spring having a spring force in the diameter reducing direction is used, or an adhesive made of an insulator is provided between the electrode assembly EA and the gap holding portion 61a. It is also possible to fill a predetermined amount.

  As shown in FIG. 10, the pressure detection switch 50 assembled in this way can arbitrarily classify the terminal members 60 having the same shape fixed to both ends thereof. For example, as shown in FIG. 10A, by fixing the resistor 70 to the one end member 60, the one end member 60 is used for resistance connection, and as shown in FIG. 10B, the other end member 60 is connected. By connecting the wiring cords 71 and 72 to the terminal member 60, the terminal member 60 on the other side can be used for cord connection.

  As described above in detail, according to the pressure detection switch 50 according to the first embodiment, the outer conductive wire 54 and the inner conductive wire 55 are provided inside each of the outer electrode 51 and the inner electrode 52. The end portions of the conducting wires 54 and 55 can be easily identified, and the wiring work of the outer conducting wire 54 and the inner conducting wire 55 can be simplified.

  In addition, a spacer member 53 is provided between the outer electrode 51 and the inner electrode 52, and a pair of terminal members 60 are provided on both ends of each electrode 51, 52, and the terminal member 60 is disposed in a portion excluding the spacer member 53. Since the gap holding portion 61a and the main body portion 62 having a pair of conductive members 63 and 64 to which the end portions of the outer conductor 54 and the inner conductor 55 are electrically connected, respectively, each terminal member 60 is shared. Thus, the function can be divided into one terminal member 60 for resistance connection and the other terminal member 60 for cord connection. Therefore, the number of parts can be reduced and the manufacturing cost can be reduced.

  Furthermore, according to the pressure detection switch 50 according to the first embodiment, the gap holding part 61a is formed in a cutout shape with a part cut away so as to have the opening 61b, and the inner electrode 52 is formed inside the gap holding part 61a. Since the spacer member 53 is disposed on the opening 61b side while being mounted, the periphery of both ends of the inner electrode 52 can be covered with the spacer member 53 made of an insulator and the gap holding portion 61a. Therefore, it is possible to reliably prevent contact between the electrodes 51 and 52 at both ends, thereby improving the product yield.

  Further, according to the pressure detection switch 50 according to the first embodiment, the main body portion 62 is formed in a flat plate shape, and the conductive members 63 and 64 are provided side by side on one side surface (surface portion 62a) of the main body portion 62. In addition, the connection work of the resistor 70 and the wiring cords 71 and 72 can be easily performed, and the assembling workability can be improved.

  Furthermore, according to the pressure detection switch 50 according to the first embodiment, since the spacer member 53 is spirally disposed on the surface of the inner electrode 52, each position of the pressure detection switch 50 in the longitudinal direction and the circumferential direction is arranged. , The radial dimension of the gap S can be made substantially uniform, and as a result, the detection sensitivity of the pressure detection switch 50 can be made substantially uniform throughout the entire area.

  Next, a second embodiment of the present invention will be described in detail with reference to the drawings. Note that parts having the same functions as those in the first embodiment are denoted by the same symbols, and detailed description thereof is omitted.

  FIGS. 11A and 11B are cross-sectional views illustrating the detailed structure of the pressure detection switch according to the second embodiment, and FIGS. 12A, 12B, and 12C are the second embodiment. Explanatory drawing explaining the detailed structure of the terminal member which concerns is each represented.

  The pressure detection switch 50 according to the second embodiment is different from the first embodiment in that the three outer conductors 54 are provided in a spiral shape inside the outer electrode 51, and the terminal member 60. The difference is that the conductive members 63 to 65 are provided on both side surfaces.

  As shown in FIG. 11 (b), the outer conductors 54 are provided at equal intervals along the axial direction of the outer electrode 51. As a result, as shown in FIG. Also in the circumferential direction, the outer conductors 54 are provided at equal intervals.

  As shown in FIG. 12, in order to increase the area of the conductive member 64 among the conductive members 63 and 64 on the front surface portion 62a, the back surface portion 62b of the main body portion 62 is electrically connected to the conductive member 64. The conductive member 65 is fixed. The conductive members 64 and 65 are electrically connected to each other by a conductive tube portion 67 provided in a through hole 66 formed at a substantially intermediate portion in the longitudinal direction of the main body portion 62. Accordingly, the conductive members 64 and 65 are integrated to form the same function. The conductive cylinder portion 67 is also formed of a thin copper plate or the like that is a conductor, like the conductive members 63 to 65.

  Of the outer conductors 54, one on the front surface 62 a side of the main body 62 is electrically connected to the conductive member 64, and two on the back surface 62 b side of the main body 62 is electrically connected to the conductive member 65. Connected. Thus, each outer conducting wire 54 is extended so as to straddle both side surfaces of the main body 62, and each outer conducting wire 54 has conductive members 64, 65 on the adjacent side of the front surface portion 62a and the back surface portion 62b. Are electrically connected to each other.

  As described in detail above, also in the pressure detection switch 50 according to the second embodiment, the number of parts can be reduced and the manufacturing cost can be reduced as in the first embodiment. Further, it is possible to reliably prevent contact between the electrodes 51 and 52 at both ends, thereby improving the product yield.

  Furthermore, in the pressure detection switch 50 according to the second embodiment, the conductive members 63 to 65 (the conductive member 64 and the conductive member 65 have the same function) are provided on both side surfaces of the main body 62 formed in a flat plate shape. Since it is provided, the area of the portion to which the resistor 70 and the wiring cords 71 and 72 (see FIG. 10) are connected can be increased. Therefore, it becomes possible to connect other electronic components and the like, and it becomes possible to increase the functionality of the pressure detection switch 50 and improve the detection performance.

  The present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. For example, in each of the above embodiments, the pressure detection switch 50 is attached to the end portion of the slide door 13 provided on the side portion 12 of the vehicle body 11, but the present invention is not limited to this, and the opening portion The pressure detection switch 50 can also be attached to the end portion 12a (the pillar PL shown in FIG. 1).

  Further, in each of the above-described embodiments, the pressure detection switch 50 is applied to the function of preventing the pinch of the slide door 13 that is opened and closed by the automatic opening and closing device 20, but the present invention is not limited to this and the automatic opening and closing is performed. The present invention can also be applied to a pinching prevention function for hinged doors, back doors, window glass, sunroofs, trunk lids and the like that are opened and closed by the device.

It is a side view showing a one-box type vehicle. It is a top view which shows the automatic switchgear provided with the pressure detection switch which concerns on this invention. It is explanatory drawing explaining the control system of the automatic opening / closing apparatus of FIG. (A), (b) is explanatory drawing explaining the attachment state of a sensor unit. (A), (b) is sectional drawing explaining the detailed structure of a pressure detection switch. It is a perspective view which shows a terminal member. (A), (b), (c) is explanatory drawing explaining the detailed structure of a terminal member. It is a circuit diagram of a pressure detection switch. (A), (b), (c) is explanatory drawing explaining the assembly | attachment procedure of a terminal member. (A), (b) is explanatory drawing explaining the connection state of resistance and a cord. (A), (b) is sectional drawing explaining the detailed structure of the pressure detection switch which concerns on 2nd Embodiment. (A), (b), (c) is explanatory drawing explaining the detailed structure of the terminal member which concerns on 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle 11 Car body 12 Side part 12a Opening part 13 Slide door 14 Roller assembly 15 Guide rail 15a Bending part 20 Automatic opening / closing device 21 Drive unit 22a, 22b Cable 23a, 23b Reverse pulley 24 Electric motor 25 Reduction gear 26 Output shaft 27 Drum 28 Multipolar magnetized magnet 29a, 29b Hall IC
DESCRIPTION OF SYMBOLS 30 Control apparatus 31 Door handle 40 Sensor unit 41 Sensor holder 41a Mounting hole 42 Bracket 50 Pressure detection switch 51 Outer electrode 52 Inner electrode 53 Spacer member 54 Outer conductor 55 Inner conductor 60 Terminal member 61 Arm part 61a Gap holding part 61b Opening part 61c Bridging portion 62 Body portion 62a Front surface portion 62b Back surface portion 63-65 Conductive member 66 Through hole 67 Conductive cylinder portion 70 Resistance 71, 72 Wiring cord CP1, CP2 Connection point DA Obstacle (detected object)
EA electrode assembly MR metal ring PL pillar P solder part S gap T heating tool

Claims (4)

A pressure detection switch that is formed in a cable shape and detects contact of an object to be detected,
An outer electrode formed in a tubular shape by a flexible conductor;
An inner electrode formed in a linear shape by a flexible conductor and disposed inside the outer electrode;
A spacer member formed of an insulator and disposed between the outer electrode and the inner electrode to form a gap between the outer electrode and the inner electrode;
An outer conductive wire spirally provided inside the outer electrode and electrically connected to the outer electrode;
An inner conductor provided along the axis within the inner electrode and electrically connected to the inner electrode;
A pair of terminal members provided on both end sides of the outer electrode and the inner electrode, respectively, and formed of an insulator;
The terminal member is disposed in a portion of the gap excluding the spacer member, and is provided integrally with the gap holding portion that holds the gap, and the end portions of the outer conductor and the inner conductor. A main body having a pair of electrically conductive members that are electrically connected to each other ,
The gap holding part is formed in a cutout shape with a part cut away so as to have an opening, the inner electrode is mounted inside the gap holding part, and the spacer member is disposed on the opening side. And pressure detection switch. The pressure detection switch according to claim 1 , wherein the main body portion is formed in a flat plate shape, and the conductive members are provided side by side on one side surface of the main body portion. 2. The pressure detection switch according to claim 1 , wherein the main body is formed in a flat plate shape, and the conductive members are provided on both side surfaces of the main body. In the pressure detection switch according to any one of claims 1 to 3, wherein the spacer member, the pressure detection switch, characterized in that it is arranged in a spiral on the surface of the inner electrode.

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