JP5497461B2 - Switch device - Google Patents

Description

  The present invention relates to a switch device, and more particularly, to a switch device capable of detecting problems such as disconnection in a connecting member such as a lead wire.

  Conventionally, in a switch device (detection switch) that detects the passage of an object by direct contact and performs counting, or activates other elements based on the detection result, the rotation is performed when the detected object passes through the object detection hole of the housing. Detachment of a switch device comprising a rotating member that moves, a second contact piece formed on a part of the rotating member, and a pair of first contact pieces arranged opposite thereto Is known (see, for example, Patent Document 1).

  In this switch device, the first chip resistor is attached in advance between the terminals of the pair of first contact pieces, and the first contact piece is insert-molded together with the first contact piece, while the longitudinal direction of the second contact piece is A second chip resistor is attached in the middle in advance, and is insert-molded on the rotating member together with the second contact piece. According to this switch device, when a current is constantly passed through the first chip resistor, the removal of the switch device can be detected by cutting off the current.

Japanese Patent Laid-Open No. 9-274827

  However, in the above-described conventional switch device, the first and second chip resistors are insert-molded in the housing and the rotating member, respectively, so that processing when forming a detection circuit for detecting the state of the switch device is performed. There is a problem that it is complicated and it is difficult to provide variations of the detection circuit.

  The present invention has been made in view of such a problem, and provides a switch device that can have a variation of a detection circuit that detects the state of the switch device without requiring complicated processing. Objective.

The switch device of the present invention includes an operating body, a movable contact that is moved by an operation on the operating body, and a switch body that has first and second terminals that are switched in a conduction state therebetween as the movable contact moves. A device state detection board mounted on the switch body and mounted with a detection element that is electrically connected to the first and second terminals, and the switch body moves in accordance with an operation on the operation body. said movable contact, characterized in that have a output terminal that is not in contact at all times to.

  According to the above switch device, since the device state detection substrate on which the detection element that is electrically connected to the first and second terminals of the switch body is mounted, the state of the switch device can be changed by changing the substrate. Since the configuration of the detection circuit to be detected can be changed, it is possible to provide variations of the detection circuit that detects the state of the switch device without requiring complicated processing.

In addition, by providing an output terminal that does not come into contact with the movable contact, it is possible to flexibly design the configuration of the detection circuit that detects the state of the switch device, and it is possible to cope with variations of various detection circuits. .

  In the switch device, the switch body includes a common contact that is always in contact with the movable contact, and a switching contact that switches a contact state with the movable contact by an operation of the operation body, the common contact and the switching contact. Are provided at the first and second terminals, respectively, and a part of the movable contact is located on an extension line of the output terminal. In this case, the common contact terminal is electrically connected to the movable contact at the time of non-operation, while the so-called normally closed type fixed contact terminal that is non-conductive at the time of operation, and the movable contact is non-conductive at the time of non-operation, Forming a switch body by cutting either a normally closed type fixed contact terminal or a normally open type fixed contact terminal in an existing switch body having a so-called normally open type fixed contact terminal that conducts during operation Therefore, many members of the existing switch body can be shared, and it is possible to cope with variations of the detection circuit that easily detects the state of the switch device.

  In the switch device, each of the first, second terminals, and the output terminal is commonly used as one of the three terminals, and the detection element including a resistance element is provided between the other terminals. It is preferable to connect. In this case, since the signal output at the time of non-operation or operation of the operating body can be obtained as a resistance value, it is possible to easily detect a malfunction of the switch body or wiring.

  In the switch device, it is preferable that the board has a hole through which the three terminals are inserted and a wiring pattern is provided, and the three terminals and the resistance element are attached to the board by soldering. In this case, since the three terminals are soldered in a state of being inserted into the holes formed in the substrate, the terminals can be easily connected, and even if vibration is applied to use in an in-vehicle application or the like. It is possible to ensure highly reliable connectivity.

  In the switch device, it is preferable that a protective member for protecting the substrate is attached to the switch body, and two terminals out of the three members protrude from the protective member. In this case, the state of the switch body can be detected with two wires, etc., and only the two terminals connected to the detection circuit are protruded outside the protective member, so that the wires etc. are not used at the unused terminals. The situation where it is connected can be prevented. In addition, since the protective member for protecting the substrate is attached to the switch body, it is possible to prevent the substrate and its package from being damaged, and to simplify the handling.

  According to the above switch device, since the device state detection substrate on which the detection element that is electrically connected to the first and second terminals of the switch body is mounted, the state of the switch device can be changed by changing the substrate. Since the configuration of the detection circuit to be detected can be changed, it is possible to provide variations of the detection circuit that detects the state of the switch device without requiring complicated processing.

It is a disassembled perspective view of the switch apparatus which concerns on one embodiment of this invention. It is a perspective view at the time of assembling the switch apparatus concerning the said embodiment. It is a sectional side view of the switch device concerning the above-mentioned embodiment. It is a sectional side view of the switch main body before the process applied to the switch apparatus which concerns on the said embodiment. It is a side view of the terminal and movable contact which the switch main body shown in FIG. 4 has. It is a figure for demonstrating the relationship between the terminal which comprises the detection circuit which the switch apparatus which concerns on the said embodiment has, and a wiring pattern. It is a block diagram of the detection circuit comprised by the terminal and wiring pattern which are shown in FIG. It is a figure for demonstrating the relationship between the terminal which comprises the other detection circuit applied to the switch apparatus which concerns on the said embodiment, and a wiring pattern. It is a block diagram of the detection circuit comprised by the terminal and wiring pattern shown in FIG. It is a figure for demonstrating the relationship between the terminal which comprises the other detection circuit applied to the switch apparatus which concerns on the said embodiment, and a wiring pattern. It is a block diagram of the detection circuit comprised by the terminal and wiring pattern shown in FIG. It is a figure for demonstrating the relationship between the terminal which comprises the other detection circuit applied to the switch apparatus which concerns on the said embodiment, and a wiring pattern. It is a block diagram of the detection circuit comprised by the terminal and wiring pattern shown in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The switch device according to the present embodiment is connected to, for example, an electronic control unit (ECU) and is preferably used as a detection switch that detects opening and closing of a vehicle bonnet or the like. The present invention is not limited, and the present invention can be applied to any switch device in other usage environments. Hereinafter, a case where the present invention is applied to a detection switch that detects opening and closing of a vehicle hood or the like will be described.

  FIG. 1 is an exploded perspective view of a switch device 1 according to an embodiment of the present invention. As shown in FIG. 1, the switch device 1 according to the present embodiment includes an operating body 22 that is operated according to contact / non-contact of a detection target, and outputs a signal corresponding to the position of the operating body 22 to an external output. A switch body 2 for detecting the state of the switch device 1 to which the terminal 211 protruding from the switch body 2 is connected, and a housing 4 as a protective member for protecting the board 3 and holding the switch body 2 And.

  The switch body 2 is formed of an insulating resin material, and has a lower case 21 having an accommodating portion 210 opened on the upper side shown in FIG. 1 and slides in the lower case 21 in the vertical direction shown in FIG. A possible operation body 22, a cover member 23 that covers the upper side of the operation body 22, and an upper side of the operation body 22 that covers the cover member 23, prevent water from entering the switch body 2. A waterproof member 24, a cover member 23, and an upper case 25 attached to the lower case 21 containing the operating body 22 with the waterproof member 24 interposed are configured.

  A plurality of terminals 211 formed by cutting a metal plate material or the like are embedded in the lower case 21. These terminals 211 are insert-molded in the process of manufacturing the lower case 21, and are arranged so that one end portion thereof is located in the accommodating portion 210 and the other end portion protrudes from the lower surface portion of the lower case 21. Yes. A plurality of engagement pieces 212 that are engaged with a part of the upper case 25 are provided on the side surface of the lower case 21. Further, a protruding piece 213 accommodated in a part of the upper case 25 is provided on the lower side portion of the side portion on the short side of the lower case 21. The configuration of the terminal 211 embedded in the lower case 21 will be described later.

  The operating body 22 includes, for example, a base 220 that is formed of an insulating resin material and has a shape corresponding to the inner wall portion of the housing portion 210, and a shaft portion 221 provided at the upper end of the base portion 220. Yes. The base part 220 has a side wall part 223 that defines an opening 222 that penetrates in the vertical direction shown in FIG. 1, and the inner wall of the side wall part 223 can be slidably contacted with a terminal 211 located in the housing part 210. A contact 26 is attached. Further, a support piece 224 that supports one end of a coil spring 27 described later is provided on the lower surface of the shaft portion 221 in the base portion 220. Furthermore, a concave portion 225 into which a protruding piece 232 of a cover member 23 described later is inserted is provided on the side surface of the base portion 220.

  The movable contact 26 is formed by bending a metal plate having a spring property into a U shape. The movable contact 26 is provided with the first and second bases 261 and 262 in the form of strips arranged opposite to each other with the opening 260, and the first and second bases 261 and 262 spaced apart from each other. U-shaped first and second connecting portions 263 and 264 for connecting the two, a hole 265 provided between the first and second connecting portions 263 and 264, and a state located in the hole 265 , And three clip-like first and second contact portions 266 and 267 provided so as to protrude from the first and second base portions 261 and 262 so as to face each other.

  The coil spring 27 is disposed in the housing portion 210 of the lower case 21 with the other end being supported by the support piece 224 of the operating body 22. The coil spring 27 urges the operating body 22 upward as shown in FIG. 1 and, for example, plays a role of returning the operating body 22 to the initial position when released from the pressing operation by the detection target. Yes.

  The cover member 23 is formed of, for example, an insulating resin material and has a generally flat plate shape. The cover member 23 has a flat plate-like portion 230 corresponding to the base portion 220 of the operating body 22, and a circular opening 231 through which the shaft portion 221 is inserted is provided at one end of the flat plate-like portion 230. In addition, a protruding piece 232 that is inserted into the recessed portion 225 formed in the side wall portion 223 of the base portion 220 of the operating body 22 is provided to protrude at a predetermined position on the lower surface of the flat plate-like portion 230.

  The waterproof member 24 is made of, for example, an elastic member such as rubber, and is provided on a flat plate portion 240 having a generally rectangular shape, a dome portion 241 protruding upward from the flat plate portion 240, and a top portion of the dome portion 241. Hole 242. In the waterproof member 24, the flat plate portion 240 is disposed on the upper end surface of the side wall portion of the lower case 21, and plays a role of preventing water from entering the housing portion 240.

  The upper case 25 is formed of, for example, an insulative resin material, and is generally provided in a box shape opened to the lower side shown in FIG. A circular opening 250 capable of exposing the dome portion 241 of the waterproof member 24 is provided on the upper surface portion of the upper case 25. In addition, a plurality of openings 251 that engage with the engagement pieces 212 of the lower case 21 are provided on the side surface of the upper case 25. Further, a concave portion 252 that accommodates the protruding piece 213 of the lower case 21 is provided on a side surface portion of the upper case 25. The protruding piece 213 of the lower case 21 is accommodated in the recess 252 and the upper case 25 and the lower case 21 are integrated by engaging the engaging piece 212 of the lower case 21 with the opening 251. It has become something that can be.

  The upper surface of the substrate 3 is connected to a terminal 211 protruding from the lower surface portion of the switch body 2, and together with the terminal 211, the switch device 1 (more specifically, the switch body 2) is in a state (normal state, abnormal state (disconnection). , Short)) is provided. A wiring pattern 31 constituting a detection circuit is provided. A plurality of through holes 32 are provided at positions corresponding to the terminals 211 on the substrate 3. The through hole 32 is disposed in the wiring pattern 31, and the terminal 211 is connected to the wiring pattern 31 while being inserted into the through hole 32. The wiring pattern 31 is soldered with a plurality of chip resistors 33 constituting a detection element. These chip resistors 33 are for indicating resistance values corresponding to the state (normal state, abnormal state) of the switch device 1. As will be described later, the arrangement of the wiring pattern 31 and the chip resistor 33 is changed according to variations of the terminal 211 in the switch body 2.

  As described above, in the switch device 1 according to the present embodiment, since the signal output when the operation body 22 is operated and when the operation body 22 is not operated can be obtained by the resistance value, it is possible to easily detect the malfunction of the switch body 2 and the wiring. It has become a thing. Further, the substrate 3 is provided with a through hole 32 through which the three terminals 211 are inserted and provided with a wiring pattern 31, and the terminals 211 and the chip resistor 33 are fixed by soldering. As a result, since the three terminals 211 are soldered in a state where they are inserted through the through-holes 32, the connection of the terminals 211 is easy, and even if vibration is applied to use in an in-vehicle application or the like, it is reliable. High connectivity can be secured.

  The housing 4 is formed of, for example, an insulating resin material, and is generally provided in a box shape having no bottom surface portion. In the center of the housing 4, an accommodating portion 41 that can accommodate the assembled switch body 2 is provided. A pair of opposing side surface portions (side portions on the short side) 42 in the housing 4 are provided so as to protrude above the other pair of side surface portions (side portions on the long side) 43. At a predetermined position on the inner wall surface of the side surface portion 42, an engagement piece 44 that engages with a part of the switch body 2 housed in the housing portion 41 is provided so as to protrude (see FIG. 3). The switch body 2 is housed in the housing portion 41 configured as described above, and is snap-in coupled to the housing 4.

  FIG. 2 is a perspective view when the switch device 1 according to the present embodiment is assembled. FIG. 3 is a side sectional view of the switch device 1 according to the present embodiment. When the switch device 1 according to the present embodiment is assembled, as shown in FIGS. 2 and 3, the switch body 2 in a state where the dome portion 241 of the waterproof member 24 is exposed from the opening 250 of the upper case 25 is the housing 4. Is held in the storage portion 41. The shaft portion 221 of the operating body 22 is inserted into the hole 242 of the dome portion 241 exposed from the opening portion 250, and the tip portion protrudes from the hole 242. Thus, the operation body 22 can be slid in the up-down direction shown in FIG. 2 by pressing the tip of the shaft portion 221 of the operation body 22 projecting from the detection target.

  In the switch device 1, as shown in FIG. 3, the operating body 22 housed in the housing portion 210 of the lower case 21 is biased upward by a coil spring 27. A flat plate-like portion 230 of the cover member 23 is arranged above the base portion 220 of the operating body 22, and a flat plate-like portion 240 of the waterproof member 24 is arranged above the flat plate-like portion 230. Then, an upper case 25 is covered from the upper side of the waterproof member 24 and fixed to the lower case 21. In this case, the end portion of the flat plate-like portion 240 of the waterproof member 24 is pressed against the upper surface of the side wall portion of the lower case 21 by the lower surface of the upper case 25, and the accommodating portion 210 of the lower case 21 is closed. Thus, the intrusion of water or the like into the accommodating portion 210 can be prevented.

  As shown in FIG. 3, in the switch device 1 according to the present embodiment, three terminals 211 a to 211 c are embedded in the lower case 21. The lengths of the terminals 211a to 211c protruding into the housing portion 210 are longer for the terminals 211a and 211b and shorter for the terminal 211c than for the terminals 211a and 211b. Specifically, the terminals 211a and 211b are disposed at positions where the operating body 22 contacts the first and second contact portions 266 and 267 of the movable contact 26 in the initial state, while the operating body 22 is at the lowermost position. The terminal 211c is arranged at a position where the first and second contact portions 266 and 267 do not come into contact with each other even when pushed to the side. In addition, the part arrange | positioned in the accommodating part 210 in these terminals 211a-211c is utilized as a fixed contact (common contact, switching contact). In the switching device 1 according to the present embodiment, the terminals 211a and 211b constitute first and second terminals, respectively, and the terminal 211c constitutes an output terminal.

  On the other hand, the length of the terminals 211a to 211c protruding from the lower surface of the lower case 21 is longer for the terminals 211a and 211c and shorter for the terminal 211b than the terminals 211a and 211c. Specifically, the terminals 211 a and 211 c are inserted into the through holes 32 of the substrate 3 and extend downward from the lower end of the housing 4 to which the switch body 2 is attached, while the terminals 211 b are connected to the substrate 3. It extends from the through hole 32 to a position slightly protruding downward. In the switch device 1 according to the present embodiment, of the three terminals 211a to 211c, the two terminals 211a and 211c are projected from the housing 4 and the terminal 211b is not projected.

  In the switch device 1 according to the present embodiment, as described above, the terminal 211 embedded in the switch body 2, the wiring pattern 31 on the substrate 3 connected to the terminal 211, and the wiring pattern 31 are connected. The detected chip resistor 33 constitutes a detection circuit that detects the state (normal state, abnormal state (disconnection, short circuit)) of the switch device 1 (switch body 2). In particular, in the switch device 1 according to the present embodiment, the variation of the detection circuit in the switch device 1 corresponds to the processing state of the terminal 211 in the switch body 2 and the wiring state of the wiring pattern 31 on the substrate 3. It has become something that can be.

  Here, the configuration of the switch body 2 before processing applied to the switch device 1 according to the present embodiment will be described. FIG. 4 is a side cross-sectional view of the switch body 2 before processing applied to the switch device 1 according to the present embodiment. FIG. 5 is a side view of the terminal 211 and the movable contact 26 included in the switch body 2 shown in FIG. Note that the switch body 2 shown in FIG. 4 is the one before the processing (cutting) processing is performed on the terminal 211 of the switch body 2 shown in FIGS. 1 to 3, except for the shape of the terminal 211. The configuration is common.

  In the terminals 211a to 211c of the switch body 2 shown in FIGS. 4 and 5, the lengths protruding into the housing portion 210 are longer for the terminals 211a and 211b, and the terminal 211c is slightly shorter than the terminals 211a and 211b. Yes. Specifically, the terminals 211a and 211b are arranged at positions where the operating body 22 is in contact with the first and second contact portions 266 and 267 of the movable contact 26 in the initial state, while the operating body 22 is slightly A terminal 211c is disposed at a position where it comes into contact with the first and second contact portions 266 and 267 in the pushed state. That is, in the terminal 211c shown in FIGS. 1-3, the process which shortens the length of the terminal 211c which protrudes in the accommodating part 210 is performed. The length of the lower case 21 protruding from the lower surface of the housing 4 is such that the terminals 211a to 211c are all provided with the same length, are inserted through the through holes 32 of the board 3, and the switch body 2 is attached. The length extends downward from the lower end. That is, the terminal 211b shown in FIGS. 1 to 3 is subjected to a processing for shortening the length protruding from the lower surface portion of the lower case 21.

  As shown in FIG. 5, the terminals 211 a to 211 c embedded in the lower case 21 are bent in the lower surface portion of the lower case 21, and are disposed in the accommodating portion 210 of the lower case 21, And in the part which protrudes from the lower surface part of the lower case 21, it is arrange | positioned in parallel, respectively. The terminal 211b disposed in the accommodating portion 210 is formed with a flat surface portion 211d and a rectangular opening 211e disposed on the lower side of the flat surface portion 211d. The tip of the terminal 211c disposed in the housing part 210 extends to a position slightly lower than the upper end part of the opening part 211e. Therefore, before the movable contact 26 slides downward, the first and second contact portions 266 and 267 are in contact with each other while holding the flat surface portion 211d of the terminal 211b. Are brought into conduction through the movable contact 26. Further, when the movable contact 26 slides downward and the first and second contact portions 266 and 267 reach the opening 211e, the terminal 211a and the terminal 211b are brought into a non-conduction state, and another corresponding The first and second contact portions 266 and 267 are in contact with the terminal 211c. As a result, the terminal 211 a and the terminal 211 c are brought into conduction through the movable contact 26. That is, the terminal 211 to be in a conductive state is switched according to the position of the movable contact 26 (position of the operating body 22). In the switch device 1 according to the present embodiment, such a terminal 211 of the switch body 2 is processed to cope with variations of the detection circuit.

  Next, the configuration of a detection circuit that detects the state of the switch body 2 constituted by the terminal 211 and the wiring pattern 31 including the chip resistor 33 included in the switch device 1 according to this embodiment will be described. FIG. 6 is a diagram for explaining the relationship between the terminal 211 and the wiring pattern 31 constituting the detection circuit included in the switch device 1 according to the present embodiment. FIG. 6A is a side view showing the configuration of the terminal 211 embedded in the switch body 2 according to the present embodiment, and FIG. 6B is viewed from the arrow A side in FIG. FIG. 3 is a diagram showing a configuration of a wiring pattern 31 on a substrate 3. FIG. 7 is a diagram illustrating a configuration example of a detection circuit including the terminal 211 and the wiring pattern 31 illustrated in FIG.

  In FIG. 6A, for the convenience of explanation, the movable contact 26 in the case where it is arranged at the initial position is shown. In the following, for convenience of description, the through holes 32 through which the terminals 211a, 211b, and 211c are inserted are referred to as “through holes 32a”, “through holes 32b”, and “through holes 32c”, respectively. Further, in the following, for convenience of explanation, the chip resistors 33 arranged on the wiring pattern 31 are referred to as “R1” and “R2”.

  As shown in FIG. 6A, in the switch body 2 according to the present embodiment, the processing is performed so as to shorten the terminal 211c disposed in the housing portion 210, and the lower case 21 Processing is performed so as to shorten the terminal 211b protruding downward. In the wiring pattern 31 connected to such a terminal 211, as shown in FIG. 6B, between the adjacent through holes 32a and 32b and between the through holes 32b and 32c. Wirings are formed between them, and chip resistors R1 and R2 are arranged in the paths of the respective wirings. That is, the chip resistors R1 and R2 are respectively connected to the through holes 32a and 32c through which the other terminals 211a and 211b are inserted with the through hole 32b through which the terminal 211b is inserted. The terminals 211a and 211c are connected to an external device such as an ECU (not shown) by two electric wires (harnesses) (not shown).

  In such a detection circuit composed of the terminal 211 and the wiring pattern 31, for example, as shown in FIG. 7, a common contact (COM) at the terminal 211a and a normal open contact (NO: Normal Open) at the terminal 211c. Are connected in series with the chip resistor R1 and the chip resistor R2, and in parallel with the chip resistor R1, the contacts (contacts a1, a2) are moved by the movement of the movable contact 26 (operation body 22). Is connected to a switch unit S1.

  In this detection circuit, when the movable contact 26 is disposed at the initial position, the switch S1 is connected to the contact a1 (that is, the state shown in FIG. 7), and the resistance of the chip resistor R2 is set as the resistance value of the detection circuit. A value will be detected. On the other hand, when the operating body 22 is pushed in and the movable contact 26 moves to a position where the terminals 211a and 211b are brought into a non-conductive state, the switch S1 is switched to the contact a2 side, and the chip resistor R1 is used as the resistance value of this detection circuit. A value obtained by adding the resistance value of the chip resistor and the resistance value of the chip resistor R2 is detected. In this case, the terminal 211c is provided with a contact functioning as a normally open contact (that is, a contact that comes into contact with the movable contact 26 as the movable contact 26 moves) before the length is shortened. However, after the shortening, even when the movable contact 26 moves to the lowermost position, it is not switched to the conductive state in relation to the movable contact 26. That is, the terminal 211c constitutes an output terminal that is used only for signal output to an external device (external circuit) such as an ECU in the detection circuit.

  Furthermore, in this detection circuit, when an electric wire connected to an external device such as an ECU is in a disconnected state, current does not flow regardless of the connection state of the switch unit S1, and therefore the detection circuit from the external device. The resistance value viewed from the side is detected as infinite. Furthermore, when the two wires connected to the external device are short-circuited, the current flows short-circuited regardless of the connection state of the switch unit S1, so that the detection circuit side is connected from the external device. The observed resistance value is detected as zero.

  As described above, in the switch device 1 according to the present embodiment, not only the connection state in the switch body 2 can be detected by determining the resistance value in the detection circuit, but also the electric wire connected to the switch device 1. It is possible to detect a disconnection state or a short-circuit state. In particular, since the detection circuit is configured only by connecting the terminals 211a to 211c, which are partially processed, to the substrate 3 provided with the wiring pattern 31 including the chip resistor 33, complicated processing such as insert molding is performed. It becomes possible to detect the disconnection state and the short state of the electric wire with respect to the switch device 1 without requiring processing. Furthermore, when configuring the detection circuit in this way, it is possible to cope with variations of a plurality of detection circuits in the switch device 1 only by changing the processing state with respect to the terminals 211a to 211c and the wiring state of the wiring pattern 31. It becomes.

  Hereinafter, configurations of other detection circuits that can be applied to the switch device 1 according to the present embodiment will be described. FIG. 8 is a diagram for explaining the relationship between the terminal 211 and the wiring pattern 31 constituting another detection circuit applied to the switch device 1 according to the present embodiment. 8A is a side view showing the configuration of the terminal 211 embedded in the switch body 2, and FIG. 8B is a wiring pattern 31 of the substrate 3 as viewed from the arrow A side in FIG. FIG. FIG. 9 is a diagram illustrating a configuration example of a detection circuit including the terminal 211 and the wiring pattern 31 illustrated in FIG.

  As shown in FIG. 8A, in the switch body 2, processing is performed so as to shorten the terminal 211 b disposed in the housing portion 210, and the switch body 2 protrudes downward from the lower case 21. Processing is performed so as to shorten the terminal 211c. In the wiring pattern 31 connected to such a terminal 211, as shown in FIG. 8 (b), between the through hole 32a and the through hole 32c which are arranged apart from each other with the through hole 32b interposed therebetween, and to each other Wirings connecting between the adjacent through holes 32b and the through holes 32c are formed, and chip resistors R1 and R2 are arranged in the paths of the respective wirings. The terminals 211a and 211b are respectively connected to an external device such as an ECU by two electric wires (not shown).

  In such a detection circuit composed of the terminal 211 and the wiring pattern 31, for example, as shown in FIG. 9, a terminal 211a used as a common contact (COM) and a normal close contact (NC: Normal Close) The chip resistor R1 and the chip resistor R2 connected in series are arranged between the terminal 211b provided to be used as a contact point and the contact (by moving the movable contact 26 in parallel with the chip resistor R1) A switch part S2 for switching the contacts a1, a2) is connected. As described above, the terminal 211b has a reduced length and is not actually provided with a normally closed contact, but in FIG. 9, for convenience, it is described as “NC”.

  In this detection circuit, when the movable contact 26 is disposed at the initial position, the switch S2 is positioned on the contact a1 side (ie, the state shown in FIG. 9), and the chip resistance is used as the resistance value of the detection circuit. A value obtained by adding the resistance value of R1 and the resistance value of the chip resistor R2 is detected. On the other hand, when the operating body 22 is pushed and the movable contact 26 moves to a position where the terminals 211a and 211c are brought into conduction, the switch S2 is connected to the contact a2, and the resistance value of the chip resistor R2 is the resistance value of this detection circuit. Will be detected. In this case, the terminal 211b is not switched to the conductive state in relation to the movable contact 26 even when the movable contact 26 moves to the lowest position. That is, the terminal 211b constitutes an output terminal that is used only for signal output to an external device such as an ECU in the detection circuit.

  Also in this detection circuit, when the electric wire connected to the external device such as the ECU is in a disconnected state, the current does not flow regardless of the connection state of the switch unit S2. The resistance value viewed from the circuit side is detected as infinite. Further, when the two wires connected to the external device are short-circuited, the current flows short-circuited regardless of the connection state of the switch unit S2, so that the detection circuit side is connected from the external device. The observed resistance value is detected as zero.

  FIG. 10 is a diagram for explaining the relationship between the terminal 211 and the wiring pattern 31 constituting another detection circuit applied to the switch device 1 according to the present embodiment. FIG. 10A is a side view showing the configuration of the terminal 211 embedded in the switch body 2, and FIG. 10B is a wiring pattern 31 of the substrate 3 viewed from the arrow A side in FIG. FIG. FIG. 11 is a diagram illustrating a configuration example of a detection circuit including the terminal 211 and the wiring pattern 31 illustrated in FIG.

  As shown in FIG. 10A, in the switch body 2, processing is performed so as to shorten the terminal 211 c disposed in the housing portion 210, and the switch body 2 protrudes downward from the lower case 21. Processing is performed so as to shorten the terminal 211a used as the common contact. In the wiring pattern 31 connected to such a terminal 211, as shown in FIG. 10 (b), between the through-hole 32a and the through-hole 32c that are arranged apart from each other with the through-hole 32b interposed therebetween, and between each other Wirings connecting between the adjacent through holes 32b and the through holes 32c are formed, and chip resistors R1 and R2 are arranged in the paths of the respective wirings. The terminals 211b and 211c are each connected to an external device such as an ECU by two electric wires (not shown).

  In such a detection circuit composed of the terminal 211 and the wiring pattern 31, for example, as shown in FIG. 11, a terminal 211b used as a normally closed contact and a normally open contact are provided. The chip resistor R2 is connected to the terminal 211c, and the contacts (contacts a1, a2) are switched at both ends of the chip resistor R2 by the movement of the chip resistor R1 and the movable contact 26 connected in series. Part S3 is connected in parallel.

  In this detection circuit, when the movable contact 26 is arranged at the initial position, the switch S3 is connected to the contact a1 (that is, the state shown in FIG. 11), and the resistance of the chip resistor R1 is set as the resistance value of the detection circuit. The value obtained by integrating the value and the resistance value of the chip resistor R2 divided by the sum of the resistance value of the chip resistor R1 and the resistance value of the chip resistor R2 (that is, (R1 × R2) / (R1 + R2)) Will be detected. On the other hand, when the operating body 22 is pushed and the movable contact 26 moves to a position where the terminals 211a and 211b are brought into a non-conductive state, the switch S3 is switched to the contact a2 side, and the chip resistor R2 is used as the resistance value of this detection circuit. The resistance value is detected. In this case, the terminal 211c having a function as a normally open contact (a function that becomes conductive with the movable contact 26 when the movable contact 26 is moved) before the shortening is the most suitable for the movable contact 26. Even when it moves to a lower position, it is not switched to the conductive state in relation to the movable contact 26. That is, the terminal 211c constitutes an output terminal that is used only for signal output to an external device such as an ECU in the detection circuit.

  Even in this detection circuit, when the electric wire connected to the external device such as the ECU is disconnected, no current flows regardless of the connection state of the switch unit S3. The resistance value viewed from the circuit side is detected as infinite. In addition, when the two wires connected to the external device are in a short state, the current flows short regardless of the connection state of the switch unit S3. The seen resistance value will be detected as zero.

  FIG. 12 is a diagram for explaining the relationship between the terminal 211 and the wiring pattern 31 constituting another detection circuit applied to the switch device 1 according to the present embodiment. 12A is a side view showing the configuration of the terminal 211 embedded in the switch body 2, and FIG. 12B is a wiring pattern 31 of the substrate 3 viewed from the arrow A side in FIG. FIG. FIG. 13 is a diagram illustrating a configuration example of a detection circuit including the terminal 211 and the wiring pattern 31 illustrated in FIG.

  As shown in FIG. 12A, in the switch body 2, processing is performed so as to shorten the terminal 211 c disposed in the housing portion 210, and the switch body 2 protrudes downward from the lower case 21. Processing is performed so as to shorten the terminal 211b. In the wiring pattern 31 connected to such a terminal 211, as shown in FIG. 12B, between the through-hole 32a and the through-hole 32c that are arranged apart from each other with the through-hole 32b interposed therebetween, and between each other Wirings connecting between the adjacent through holes 32b and the through holes 32c are formed, and chip resistors R1 and R2 are arranged in the paths of the respective wirings. The terminals 211b and 211c are each connected to an external device such as an ECU by two electric wires (not shown).

  In such a detection circuit composed of the terminal 211 and the wiring pattern 31, for example, as shown in FIG. 13, a terminal 211a used as a common contact and a normally open contact are provided. A chip resistor R1 is connected to the terminal 211c, and is connected in series to both ends of the chip resistor R1. The switch unit S4 and the chip resistor are switched in contact (contacts a1, a2) by the movement of the movable contact 26. R2 is connected in parallel.

  In this detection circuit, when the movable contact 26 is disposed at the initial position, the switch S4 is connected to the contact a1 (that is, the state shown in FIG. 13), and the resistance of the chip resistor R1 is set as the resistance value of the detection circuit. The value obtained by integrating the value and the resistance value of the chip resistor R2 divided by the sum of the resistance value of the chip resistor R1 and the resistance value of the chip resistor R2 (that is, (R1 × R2) / (R1 + R2)) Will be detected. On the other hand, when the operating body 22 is pushed and the movable contact 26 moves to a position where the terminals 211a and 211b are brought into a non-conductive state, the switch S4 is switched to the contact a2 side, and the chip resistor R1 is used as the resistance value of this detection circuit. The resistance value is detected. In this case, the terminal 211c having the function of a normally open contact before shortening is switched to a conductive state in relation to the movable contact 26 even when the movable contact 26 moves to the lowest position. There is nothing. That is, the terminal 211c constitutes an output terminal that is used only for signal output to an external device such as an ECU in the detection circuit.

  Even in this detection circuit, when the electric wire connected to the external device such as the ECU is in a disconnected state, the current stops flowing regardless of the connection state of the switch unit S4. The resistance value viewed from the circuit side is detected as infinite. Furthermore, when the two wires connected to the external device are short-circuited, the current flows short-circuited regardless of the connection state of the switch unit S4. The seen resistance value will be detected as zero.

  As described above, in the switch device 1 according to the present embodiment, four types of detection circuits as shown in FIGS. 6 to 13 can be obtained simply by changing the processing state of the terminals 211a to 211c and the wiring state of the wiring pattern 31. It is possible to cope with variations of the detection circuit including. Note that these variations of the detection circuit are merely examples, and the configuration of the detection circuit to which the present invention is applied is not limited to this and can be changed as appropriate.

  In particular, in the switch device 1 according to the present embodiment, the switch body 2 is connected to the output terminal (the terminal 211c shown in FIG. 6 or FIG. 8) that is not connected to the movable contact 26 that moves in response to the operation on the operating body 22. Terminal 211b shown in FIG. By providing the output terminal in this manner, the configuration of the detection circuit for detecting the state of the switch device 1 can be designed flexibly, and it is possible to cope with various detection circuit variations.

  Further, in the switch device 1 according to the present embodiment, a so-called normal close type fixing that is electrically connected to the common contact terminal (terminal 211a shown in FIG. 4) and the movable contact at the time of non-operation, and becomes non-conductive at the time of operation. An existing contact terminal (terminal 211b shown in FIG. 4) and a so-called normal open type fixed contact terminal (terminal 211c shown in FIG. 4) that is in a non-conducting state with the movable contact when not operated and is electrically connected when operated. Since the switch body 2 can be formed by cutting either the normally closed type fixed contact terminal or the normally open type fixed contact terminal in the switch body 2, many members of the existing switch body 2 are shared. It is possible to cope with variations of the detection circuit that easily detects the state of the switch device 1.

  Furthermore, in the switch device 1 according to the present embodiment, as shown in FIG. 6 (b), the through hole 32b through which the terminal 211b is inserted is shared, and the through hole 32a through which the other terminals 211a and 211b are inserted. , 32c are connected to chip resistors R1, R2, respectively. Thereby, since the signal output at the time of non-operation with respect to the operation body 22 at the time of operation can be obtained as a resistance value, it is possible to easily detect the malfunction of the switch body 2 and the wiring.

  Further, in the switch device 1 according to the present embodiment, the substrate 3 has a through-hole 32 through which the three terminals 211a to 211c are inserted, and is provided with a wiring pattern 31, and these three terminals 211a to 211a. 211c and the chip resistor 33 are attached to the substrate 3 by soldering. As a result, since the three terminals 211a to 211c are soldered in a state of being inserted through the through holes 32, the terminals 211a to 211c can be easily connected, and vibrations are applied to use in an in-vehicle application or the like. However, it is possible to ensure highly reliable connectivity.

  Furthermore, in the switch device 1 according to the present embodiment, the housing 4 that protects the substrate 3 is attached to the switch body 2, and two terminals 211a and 211c (shown in FIG. 6) among the three terminals 211a to 211c. (In the case of a detection circuit) is protruded from the housing 4. As a result, it is possible to prevent a situation where wiring or the like is connected to the terminal 211b that is not used for connection with the outside. In addition, since the housing 4 that protects the substrate 3 is attached to the switch body 2, it is possible to prevent the substrate 3 and the mounted product from being damaged, and to simplify the handling thereof.

  In the above embodiment, the case where the processing state of the terminals 211a to 211c and the wiring state of the wiring pattern 31 are changed has been described. However, the present invention changes the wiring state of the wiring pattern 31 (that is, the substrate). It can be established simply by changing 3). This corresponds to, for example, the relationship between the detection circuit shown in FIGS. 6 and 7 and the detection circuit shown in FIGS. As described above, in the switch device 1 according to the present embodiment, the chip resistors R1 and R2 that are electrically connected to the two terminals 211 of the switch body 2 (the terminals 211a and 211b in the detection circuit shown in FIG. 6) are mounted. Since the configuration of the detection circuit for detecting the state of the switch device 1 can be changed by changing the substrate 3, it is possible to have variations of the detection circuit without requiring complicated processing.

  In addition, this invention is not limited to the said embodiment, It can change and implement variously. In the above-described embodiment, the size, shape, and the like illustrated in the accompanying drawings are not limited to this, and can be appropriately changed within a range in which the effect of the present invention is exhibited. In addition, various modifications can be made without departing from the scope of the object of the present invention.

DESCRIPTION OF SYMBOLS 1 Switch apparatus 2 Switch main body 21 Lower case 210 Accommodating part 211 (211a, 211b, 211c) Terminal 211d Plane part 211e Opening part 212 Engagement piece 213 Projection piece 22 Operation body 220 Base part 221 Shaft part 222 Opening part 223 Side wall part 224 Supporting piece 225 Concave part 23 Cover member 230 Flat part 231 Opening part 232 Projection piece 24 Waterproof member 240 Flat part 241 Dome part 242 Hole 25 Upper case 250 Opening part 251 Opening part 26 Movable contact 260 Opening part 261 First base part 262 2nd base part 263 1st connection part 264 2nd connection part 265 Hole 266 1st contact part 267 2nd contact part 27 Coil spring 3 Board | substrate 31 Wiring pattern 32 (32a, 32b, 32c) Through-hole 33 ( R1, R2) Chip resistance (resistance element)
4 Housing (Protective member)
41 accommodating part 42, 43 side part 44 engagement piece

Claims (5)

An operating body, a movable contact that is moved by an operation on the operating body, a switch body that has first and second terminals that are switched between conductive states as the movable contact moves, and a switch body that is attached to the switch body. And a device state detection board on which a detection element that conducts with the first and second terminals is mounted, and the switch body is always the movable contact that moves in response to an operation on the operation body. switch device characterized in that it have the output terminal which is not in contact. The switch body includes a common contact that is always in contact with the movable contact, and a switching contact that switches a contact state with the movable contact by an operation of the operating body, and the common contact and the switching contact are the first and second switching contacts, respectively. 1, is provided to a second terminal, the switch device according to claim 1, wherein a portion of the movable contact on the extension of the output terminals is characterized by being located. One of the three terminals, the first terminal, the second terminal, and the output terminal, is used in common, and the detection element made of a resistance element is connected between the other terminal and the other terminal, respectively. The switch device according to claim 2 . On the substrate, the wiring pattern is provided which has a hole in which the three terminals are inserted, according to claim 3, wherein said on the substrate three terminals and a resistance element is characterized in that it is mounted by soldering Switch device. The switch device according to claim 3 or 4 , wherein a protective member for protecting the substrate is attached to the switch body, and two terminals out of the three terminals protrude from the protective member.

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