JP3169859U - Switch device - Google Patents

Abstract

A switch device capable of improving the accuracy of switching timing from OFF to ON when an operation member is pushed in is provided. An operation member 11 to be pushed in, a housing 12 provided with a storage portion for storing the operation member 11 so as to be able to reciprocate, a plurality of fixed contacts 15 disposed in the storage portion, A movable contact 17 having a contact portion for holding the plurality of fixed contacts 15 and a return member 19 for returning the operation member 11 are provided. As the operating member 11 reciprocates, the distal end side of the switching fixed contact 15K where the contact portion 57k of the movable contact 17 contacts and separates is flush with the sliding contact surface of the switching fixed contact 15K where the contact portion 57k slides. Thus, the insulating portion 18 is provided, and when the contact portion 57k contacts the switching fixed contact 15K as the operating member 11 is pushed in, the contact portion 57k passes through the insulating portion 18 and the switching fixed contact 15K. It was configured to reach. [Selection] Figure 2

Description

  The present invention relates to a switch device in which a movable contact member capable of sliding contact with a plurality of fixed contacts is provided on an operation member, and a conduction state between the plurality of fixed contacts is switched by pushing the operation member.

  In this type of switch device, a plurality of contact portions are provided on a movable contact member that is held by an operation member and reciprocates integrally, and the operation member is pushed in against the urging force of the return elastic member. Then, each contact part corresponding to each of the plurality of fixed contacts arranged in the case slides on the fixed contact. For example, a normally open type switching device consists of a common fixed contact and a switching fixed contact. When the operating member is not operated, one contact is in contact with the common fixed contact and the other is separated from the switching fixed contact. is doing. When the operation member is pushed in by a predetermined stroke, one contact portion comes into sliding contact with the common fixed contact, the other contact portion comes into sliding contact with the switching fixed contact, and the switch is turned on. Also, when the pressing operation is released, the urging force of the return elastic member returns to the non-operating state and the switch is turned off.

  As described above, a switch device that switches a conduction state between a plurality of fixed contacts by pushing an operation member is well known. However, when this switch device is used for detecting an operation state of a device, it is turned on.・ The accuracy of the off-switching timing has been strictly demanded.

  As such a switch device, in Patent Document 1, as shown in FIG. 14, three fixed contacts (907, 908, 925), a movable contact member 910, a return coil spring 926, and a case above the case. A push button switch 900 composed of a protruding operation member 913 has been proposed. A push button switch 900 shown in FIG. 14 includes a first movable contact portion 909c and a second movable contact portion at three locations of a horizontally long movable contact member 910 attached to a laterally extending portion 913e of the operation member 913. 909b, a third movable contact portion 909a is formed, a common fixed contact 925 in which the first movable contact portion 909c is always in sliding contact, a normally open fixed contact 908 in which the second movable contact portion 909b is in sliding contact during a pushing operation, A normally closed fixed contact 907 is erected and provided in contact with the third movable contact portion 909a during non-operation.

  In the pushbutton switch of Patent Document 1 configured as described above, when the operation member 913 is not operated, the second movable contact portion 909b is separated from the normally open fixed contact 908, and the switch is turned off. When the pressing portion 913 s of the operation member 913 is pushed in via an actuator or the like, the movable contact member 910 is integrally lowered with the operation member 913 in the case, so that the first movable contact portion 909 c is the common fixed contact 925. And the second movable contact portion 909b comes into contact with the normally open fixed contact 908. As a result, the normally open fixed contact 908 and the common fixed contact 925 are brought into a conductive state, and the contact switching from OFF to ON is performed. In addition, since the coil spring 926 is compressed immediately below the pressing portion 913s of the operation member 913 during the pressing operation, when the pressing operation force on the pressing portion 913s is removed, the operation member 913 is caused by the elastic return force of the coil spring 926. Is pushed up to the original position (non-operating position). As a result, the second movable contact portion 909b moves away from the normally open fixed contact 908 and automatically returns to the original off state.

JP 2006-255154 A

  However, in the configuration such as the push button switch 900 of Patent Document 1 described above, the assembly position of the second movable contact portion 909b and the normal position of the second movable contact portion 909b are always affected by variations in member dimensions, assembly errors during assembly, clearances between the members, and the like. Some deviation occurs in the assembly position of the open fixed contact 908. In particular, the elastic arm portion having the second movable contact portion 909b at the tip thereof is inclined above the normally open fixed contact 908, and the normally open fixed contact 908 and the second movable contact portion 909b are movable contact members. If the position is shifted in a direction substantially orthogonal to the moving direction of 910 (a direction orthogonal to the paper surface of FIG. 14), the second movable contact portion 909b contacts the normally open fixed contact 908 during the pressing operation of the pressing portion 913s. Deviations also occur at the starting position. As a result, when the operation member is pushed in, the timing at which the contact portion of the movable contact member and the fixed contact come into contact with each switch device is different, and the accuracy of the switch device switching timing from OFF to ON decreases. There was a problem.

  The present invention solves the above-described problems, and an object of the present invention is to provide a switch device that can improve the accuracy of switching timing from OFF to ON when an operation member is pushed in.

  In order to solve this problem, a switch device according to the present invention includes an operation member having an operation portion that is pushed in, a storage portion that has an opening for projecting the operation portion and stores the operation member in a reciprocating manner. And a plurality of fixed contacts disposed in the storage portion, and the conduction state is switched between the plurality of fixed contacts provided on the operation member and the plurality of fixed contacts are sandwiched respectively. In the switch device comprising: a movable contact having a contact portion for performing a return operation; and a return member for returning the operation member to a non-operation position before being pushed, at least one of the plurality of fixed contacts is the operation A switching fixed contact in which the contact portion of the movable contact is brought into contact with and separated from the reciprocating movement of a member, and the contact of the switching fixed contact is extended to the front end side of the contact portion. An insulating portion is provided so as to be flush with the slidable contact surface of the switching fixed contact that slides, and when the contact portion comes into contact with the switching fixed contact as the operating member is pushed in. The contact portion reaches the switching fixed contact via the insulating portion.

  According to this, the switch device of the present invention has an insulating portion provided flush with the sliding contact surface of the switching fixed contact on which the contact portion slides before the contact portion of the movable contact contacts the switching fixed contact. Since the switching fixed contact is reached via the contact portion, the contact portion that first holds the insulating portion slides on the insulating portion and comes into contact with the switching fixed contact smoothly. As a result, even if the positions of the switching fixed contact and the contact portion vary in the direction intersecting the direction of movement of the contact portion (substantially orthogonal direction), the contact portion first holds the insulating portion to Since the variation is corrected, the switching fixed contact and the contact portion of the movable contact can be brought into contact with each other at substantially the same position. Therefore, the movement direction of the movable contact (contact portion) accompanying the pushing operation of the operation member is changed to the position of the contact portion of the movable contact and the position of the switching fixed contact due to the influence of the dimensional variation of the member or the mounting error at the time of assembly. Even if there is a deviation in the intersecting direction (substantially orthogonal direction), it is possible to improve the accuracy of the switching timing from OFF to ON accompanying the pushing operation of the operation member.

  Further, in the switch device of the present invention, the casing has an insulating base that holds the plurality of fixed contacts extending in the housing portion, and the insulating base has a base portion in which the plurality of fixed contacts are embedded. And a standing portion that is erected on the base portion along the switching fixed contact and that extends longer than the extended tip of the switching fixed contact, and the insulating portion is the standing configuration It is characterized by being provided so as to be integrated with the part and extending from the standing part to the tip side of the switching contact.

  According to this, since the insulating part is provided integrally with the standing part formed on the insulating base and extends from the standing part, the insulating part can be reliably arranged at the tip of the switching fixed contact. it can. In addition, as compared with the case where the insulating portion is provided as a single member, it is possible to prevent the displacement of the insulating portion or the dropout due to the contact portion of the movable contact or the sliding. As a result, the contact portion of the movable contact can be reliably slidably contacted with the insulating portion and the switching fixed contact, so that the accuracy of switching timing from OFF to ON can be further improved.

  Further, in the switch device of the present invention, the switching fixed contact is formed of a metal plate, and at least a part of the plate surface of the metal plate constituting the switching fixed contact extending into the storage portion, The switching fixed contact is held by the insulating base member in close contact with the standing portion over the entire length of the switching fixed contact located in the storage unit.

  According to this, since the switching fixed contact is held by the insulating base in a state in which a part of the plate surface of the metal plate constituting the switching fixed contact is in close contact with the standing portion over the entire length, the switching fixed contact and the tip thereof It is possible to make the insulating portion provided on the surface of the insulating film accurately. As a result, the contact portion can be smoothly slid from the insulating portion to the switching fixed contact, and the occurrence of bounce or the like can be prevented when the contact is switched. Therefore, the accuracy of the switching timing from OFF to ON can be further improved.

  In the switch device of the present invention, the boundary surface between the switching fixed contact and the insulating portion is provided with a convex portion projecting to the other side on one side of the switching fixed contact and the insulating portion. In addition, a concave portion into which the convex portion is fitted is formed on the other side.

  According to this, a convex portion is provided on one side of the switching fixed contact and the insulating portion, and a concave portion that fits the convex portion is provided on the other side, thereby positioning the switching fixed contact and the insulating portion more. Thus, the switching fixed contact and the insulating portion provided at the tip of the switching fixed contact can be more accurately maintained in a flush state. Therefore, it is possible to maintain an accurate state of the switching timing from off to on for a long period of time.

  The switch device according to the present invention includes a case in which the casing is integrated with the insulating base, and a guide portion that guides the operation member so as to reciprocate is provided in the storage portion. The base body has a base portion inserted into the housing portion of the case, and the outer wall of the base portion is opposed to the base portion in plan view with the switching fixed contact and the contact portion interposed therebetween. In addition, the locking ribs are formed so as to extend in the extending direction of the plurality of fixed contacts, respectively, and when the base portion is inserted into the storage portion of the case, the locking ribs of the case It is characterized by being configured to be deformed by the inner wall.

  According to this, the locking rib for locking the case where the guide part of the operation member is formed and the insulating base is provided on the outer wall of the base provided on the insulating base, and the locking rib is mounted on the base. When the switch is fixed, the case and the insulating base can be accurately mounted without any backlash. The position of the switch fixed contact and the movable contact Accuracy can be improved. As a result, it is possible to further improve the accuracy of the switching timing from OFF to ON accompanying the pressing operation of the operating member.

  Further, in the switch device of the present invention, the movable contact is formed by bending a metal plate, and has a connection base and a pair of elastic arm portions opposed to each other connected to the connection base. The movable contact is provided with a plurality of the pair of elastic arm portions corresponding to each of the plurality of fixed contacts, and the free ends of the pair of elastic arm portions are directed in the protruding direction of the operation portion. And the contact portion is provided at the distal end portion on the free end side, and in a state where the operation member is in the non-operation position, the contact portion is configured to store the switching fixed contact. The insulating portion is provided with a guide surface that becomes narrower with distance from the switching fixed contact, and the contact portion slides on the guide surface. Configure to touch It is characterized in that was.

  According to this, since the free end sides of the pair of elastic arm portions extend in the protruding direction of the operation portion, the insulating portion is not from the free end side of the pair of elastic arm portions but from the side connected to the connection base portion. Can be inserted between the pair of contact portions. As a result, it is possible to prevent the pair of elastic arm portions and the insulating portion from coming into contact with each other due to the influence of dimensional variations of components, attachment errors during assembly, and the like, and deformation of the pair of elastic arm portions. Moreover, since the guide surface which becomes narrow as it leaves | separates from a switching fixed contact is provided in the operation member side of the insulation part, when a pair of contact part clamps an insulation part, a pair of contact part is smoothly and reliably. An insulating part can be brought in between. Accordingly, it is possible to more reliably prevent the pair of contact portions and the insulating portion from coming into contact with each other and deform the pair of contact portions, and it is possible to further suppress wear of the pair of contact portions and the insulating portion.

  The switch device of the present invention is characterized in that the contact portion is separated from the insulating portion in a state where the operation member is in the non-operation position.

  According to this, since the contact portion is separated from the insulating portion in the state where the operation member is in the non-operation position, the contact made of silver, for example, constituting the movable contact or the contact portion of the movable contact by repeating the switch operation. Even if the chip or the switching fixed contact is worn and the wear powder is dragged to the movable contact and adheres to the insulating portion, the insulation between the switching fixed contact and the movable contact can be ensured. As a result, the reliability of the switch device is improved and the life is extended.

  In the switch device of the present invention, one of the plurality of fixed contacts different from the switching fixed contact is a common fixed contact, the return member is configured by a coil spring, and the coil spring is It arrange | positions between a common fixed contact and the said switching fixed contact, The said coil spring is urging | biasing the said movable contact, It is characterized by the above-mentioned.

  According to this, since the coil spring as a return member is arranged between the common fixed contact and the switching fixed contact, and the coil spring urges the movable contact, the movable contact can be held in a well-balanced manner. The switching fixed contact and the movable contact can be arranged with high accuracy. Accordingly, the contact portion of the movable contact can be stably brought into contact with the switching fixed contact, so that the accuracy of the switching timing from OFF to ON can be further improved.

  The switch device of the present invention is switched and fixed via an insulating portion provided flush with the sliding contact surface of the switching fixed contact on which the contact portion slides before the contact portion of the movable contact contacts the switching fixed contact. Since the contact point is reached, the contact part that first sandwiched the insulating part slides on the insulating part and comes into contact with the switching fixed contact smoothly. As a result, even if the positions of the switching fixed contact and the contact portion vary in the direction intersecting the direction of movement of the contact portion (substantially orthogonal direction), the contact portion first holds the insulating portion to Since the variation is corrected, the switching fixed contact and the contact portion of the movable contact can be brought into contact with each other at substantially the same position.

  Therefore, according to the present invention, the movable contact (contact portion) associated with the push-in operation of the operating member is brought into the position of the contact portion of the movable contact and the position of the fixed contact due to the influence of the dimensional variation of the member or the mounting error during assembly. ), The switching device can improve the accuracy of the switching timing from OFF to ON due to the pushing operation of the operating member.

FIGS. 1A and 1B are diagrams illustrating a switch device according to a first embodiment of the present invention, in which FIG. 1A is a front view of the switch device, and FIG. 1B is a top view of the switch device. It is a disassembled perspective view explaining the switch apparatus of 1st Embodiment of this invention. It is the figure which abbreviate | omitted some structural members explaining the switch apparatus of 1st Embodiment of this invention, Comprising: Fig.3 (a) is a side view of the switch apparatus seen from the Y2 side shown in FIG. FIG. 3B is a side view of the switch device viewed from the X2 side shown in FIG. It is a figure explaining the switch apparatus of 1st Embodiment of this invention, Comprising: It is a disassembled perspective view of a case and an operation member. It is a figure explaining the switch apparatus of 1st Embodiment of this invention, Comprising: It is a perspective view of the insulation base | substrate which embed | buried the several fixed contact. FIG. 6 is a top view of an insulating base in which a plurality of fixed contacts shown in FIG. 5 are embedded. It is a figure explaining the switch apparatus of 1st Embodiment of this invention, Comprising: Fig.7 (a) is a perspective view of a movable contact, FIG.7 (b) is a reverse view of a movable contact. It is a figure explaining the switch apparatus of 1st Embodiment of this invention, Comprising: It is sectional drawing of the VIII-VIII line shown to Fig.3 (a). It is a figure explaining the switch device of a 1st embodiment of the present invention, and is an exploded perspective view of an insulating base and a fixed contact. It is a figure explaining the switch device of a 1st embodiment of the present invention, and is an exploded perspective view of an insulating base and a fixed contact. It is a figure explaining the switch apparatus of 2nd Embodiment of this invention, Comprising: It is the perspective view which abbreviate | omitted some structural members. It is a figure explaining the switch apparatus of 2nd Embodiment of this invention, Comprising: It is a perspective view of a movable contact. It is a figure explaining the modification 2 of the switch apparatus of 1st Embodiment of this invention, Comprising: It is a perspective view of a movable contact. It is sectional drawing which showed the pushbutton switch of the prior art example typically.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[First Embodiment]
FIG. 1 is a diagram for explaining a switch device 101 according to a first embodiment of the present invention. FIG. 1A is a front view of the switch device 101, and FIG. It is a top view. FIG. 2 is an exploded perspective view illustrating the switch device 101 according to the first embodiment of the present invention. FIG. 3 is a view for explaining the switch device 101 according to the first embodiment of the present invention. FIG. 3A is a view from the Y2 side shown in FIG. 1 when the operation member 11 is in the non-operation position. 3B is a side view of the switch device 101, and FIG. 3B is a side view of the switch device 101 viewed from the X2 side shown in FIG. In FIG. 3, the case 14, the operation member 11, and the dustproof cover 111 are omitted for ease of explanation. FIG. 4 is a diagram illustrating the switch device 101 according to the first embodiment of the present invention, and is an exploded perspective view of the case 14 and the operation member 11. FIG. 5 is a diagram illustrating the switch device 101 according to the first embodiment of the present invention, and is a perspective view of the insulating base 13 in which a plurality of fixed contacts 15 are embedded. FIG. 6 is a top view of the insulating base 13 in which the plurality of fixed contacts 15 shown in FIG. 5 are embedded. 7A and 7B are diagrams illustrating the switch device 101 according to the first embodiment of the present invention. FIG. 7A is a perspective view of the movable contact 17, and FIG. 7B is a diagram of the movable contact 17. It is a back view.

  As shown in FIGS. 1, 2, 3, and 4, the switch device 101 according to the first embodiment of the present invention includes an operation member 11 having an operation part 11 t that is pushed in and an opening through which the operation part 11 t protrudes. The housing 12 is provided with a housing portion 12s that includes the portion 12k and accommodates the operation member 11 so as to be able to reciprocate, a plurality of fixed contacts 15 provided in the housing portion 12s, and a plurality of the contact members 12 provided on the operation member 11. The movable contact 17 having contact portions 57A for switching the conduction state between the fixed contacts 15 and holding the plurality of fixed contacts 15 respectively, and a return member for returning the operation member 11 to the non-operation position before being pushed in. 19 is mainly constituted.

  The operation member 11 includes an operation base portion 11k that holds the movable contact 17 in the housing 12, and a pressing shaft portion 11j that protrudes from the operation base portion 11k. The operation base 11k has a substantially U-shaped (U-shaped) recess 11r that houses the movable contact 17, and a connection base 17j of the movable contact 17 described later is provided on the ceiling surface 11p of the recess 11r. Are fixed by caulking or the like, and further contacted by the pressing force of the return member 19. Then, the upper end portion of the return member 19 formed of a coil spring comes into contact with the back surface 17b (see FIG. 7) of the connection base portion 17j, and this connection base portion 17j and the spring mounting portion 13a (more precisely, the spring) A return member 19 is interposed in a compressed state with the insulating base 13) located around the mounting portion 13a. Therefore, the operation member 11 is elastically biased upward by the return member 19. Further, the pressing shaft portion 11j passes through the opening 12k and protrudes above a case 14 described later, and an operation portion 11t which is a tip portion of the pressing shaft portion 11j is pushed by an actuator (not shown) or the like. It is like that. In addition, the operation member 11 is integrally formed with the operation base 11k and the pressing shaft 11j by injection molding or the like using a synthetic resin material such as ABS, PET, PBT, or LCP.

  The housing 12 includes a case 14 provided with a guide portion 14g for guiding the operating member 11 so as to be reciprocally movable in the storage portion 12s, and an insulating base 13 that extends and holds the plurality of fixed contacts 15 in the storage portion 12s. Consists of. An opening 12k is formed at the upper end of the case 14, and the pressing shaft portion 11j of the operation member 11 protrudes upward from the opening 12k. Further, a dustproof cover 111 made of a flexible material such as rubber is fixed around the opening 12k, and an operation portion which is a tip portion of the pressing shaft portion 11j from a hole 111k of the dustproof cover 111. 11t protrudes. Similarly, the case 14 is formed by injection molding or the like using a synthetic resin material such as ABS, PET, PBT, or LCP.

  Since the dustproof cover 111 is fitted to the pressing shaft portion 11j and covers the opening 12k, the dustproof cover 111 fulfills a dustproof function for the switch device 101. Further, since the dustproof cover 111 is easily elastically deformed with the vertical movement of the pressing shaft portion 11j, the operation of the operation member 11 is not adversely affected. Further, the concave guide portion 14g provided in the case 14 guides and guides the convex guide receiving portion 11g provided in the operation base portion 11k of the operation member 11, so that the push operation is performed. The guide portion 14g enables the operation member 11 to reciprocate.

  As shown in FIGS. 2, 3, and 5, the insulating base 13 includes a base portion 13 k in which a plurality of fixed contacts 15 are embedded, and a standing portion that is erected on the base portion 13 k along a switching fixed contact 15 </ b> K described later. 13s, a base part 13d inserted into the storage part 12s of the case 14, and a spring mounting part 13a formed on the base part 13d. The base portion 13k is formed by embedding a conductive metal plate which is a base material of the connection terminal 55K, the connection terminal 55C, the switching fixed contact 15K, and a common fixed contact 15C described later. A method of embedding and molding a conductive metal plate uses a synthetic resin material such as ABS, PET, PBT, or LCP for the insulating base 13 and uses an insert molding method.

  The standing portion 13s is formed to extend longer than the extended tip of the switching fixed contact 15K. Further, an insulating portion 18 to be described later is provided on the distal end side of the switching fixed contact 15K extended into the storage portion 12s. Further, a spring mounting portion 13a is projected from the upper surface side of the base portion 13d, and the lower end portion of the return member 19 is mounted around the spring mounting portion 13a.

  As shown in FIGS. 1, 2, 3 and 5, the fixed contact 15 is composed of a switching fixed contact 15K and a common fixed contact 15C, and the switching fixed contact 15K is provided at one end of the spring mounting portion 13a. A common fixed contact 15 </ b> C is erected on the other end side so as to extend into the housing portion 12 s of the case 14. Further, the extending direction into the storage portion 12s coincides with the protruding direction of the operation portion 11t. The two fixed contacts 15, the switching fixed contact 15 </ b> K and the common fixed contact 15 </ b> C, are connected to a connection terminal 55 </ b> K and a connection terminal 55 </ b> C that are suspended from the back side of the insulating base 13, and are led out of the housing 12. . The switching fixed contact 15K, the common fixed contact 15C, the connection terminal 55K, and the connection terminal 55C are made of a conductive metal plate, and transmit the on / off information (signal). Connected to a circuit board of an electronic device. The conductive metal plate is made of copper, iron, an alloy containing them as a main component, or the like, and the surface is plated with nickel, silver, or the like.

  As shown in FIG. 3, in a state where the operation member 11 (not shown) is in the non-operation position, the common fixed contact 15C is connected to the contact portion 57c of the movable contact 17, and the switching fixed contact 15K is The contact point 57k of the movable contact 17 is separated. As the operating member 11 reciprocates, the contact portion 57k of the movable contact 17 comes into contact with and separates from the switching fixed contact 15K.

  As shown in FIGS. 3 and 5, the insulating portion 18 is provided integrally with the standing portion 13 s so as to extend from the standing portion 13 s to the distal end side of the switching fixed contact 15 </ b> K. Further, the insulating portion 18 is configured such that the switching fixed contact 15K side is flush with the sliding contact surface 15p of the switching fixed contact 15K on which the contact portion 57k slides, as shown in FIGS. . Since the insulating portion 18 is formed integrally with the standing portion 13s, it is manufactured simultaneously with the insert molding of the insulating base 13. Further, the insulating portion 18 is more preferably formed integrally with the standing portion 13s, but may be manufactured as a separate member.

  As shown in FIG. 7, the movable contact 17 is a conductive metal plate formed by bending an elastic metal plate. The movable contact 17 is connected to the connecting base 17j formed in a flat plate shape and the connecting base 17j. It consists of a pair of opposing elastic arm portions 17w and a contact portion 57A provided at the free end of the pair of elastic arm portions 17w. The pair of elastic arm portions 17w are respectively formed at one end and the other end of the coupling base portion 17j corresponding to the switching fixed contact 15K and the common fixed contact 15C. Further, the pair of elastic arm portions 17w are formed in a substantially U shape when viewed from the front (see FIG. 3A), and the free end side not connected to the connection base portion 17j is the protruding direction of the operation portion 11t. It extends toward. The conductive metal plate is made of copper, iron, an alloy containing them as a main component, or the like, and the surface is plated with nickel, silver, or the like. In the first embodiment, as the contact portion 57A, a contact tip made of silver, which is a separate member from the conductive metal plate, is provided by caulking or the like at the tip of the elastic arm portion 17w.

  Further, as shown in FIG. 3, in a state where the operation member 11 is in the non-operation position, the contact portion 57k is disposed so as to be separated from the distal end side of the switching fixed contact 15K. Further, as shown in FIG. 7B, the pair of elastic arm portions 17w are in a shape in which the fixed contact 15 side, that is, the base portion 13k side of the insulating base 13 is opened, and the pair of contact portion 57A side (elastic arm portion 17w). The tip end side is closed. Accordingly, the closed pair of contact portions 57A can hold the open-side fixed contact 15 by the elasticity of the pair of elastic arm portions 17w as the operation member 11 is pushed. As described above, when the fixed contact 15 is inserted from the open side of the pair of elastic arm portions 17w, the pair of contact portions 57A can be easily moved between the insulating portion 18 and the common fixed contact 15C. The pair of contact portions 57A is more preferable because it is easy to open.

  After assembling the above components, as shown in FIG. 3, laser welding is performed over the entire circumference of the joint 222 between the insulating base 13 and the case 14 to perform welding. Thereby, it has a dustproof effect and also has a waterproof effect, and the switch device 101 is provided as a waterproof push switch.

Next, the operation of the switch device 101 configured as described above will be described.
FIG. 8 is a diagram for explaining the switch device 101 according to the first embodiment of the present invention, and is a cross-sectional view taken along line VIII-VIII shown in FIG. FIG. 9 is a diagram illustrating the switch device 101 according to the first embodiment of the present invention, and is an exploded perspective view of the insulating base 13 and the fixed contact 15. FIG. 10 is a diagram illustrating the switch device 101 according to the first embodiment of the present invention, and is an exploded perspective view of the insulating base 13 and the fixed contact 15. Although the insulating base 13 including the standing portion 13s and the switching fixed contact 15K are integrally formed by an insert molding method, FIGS. 9 and 10 are shown in an exploded manner for easy explanation. ing.

  First, as shown in FIGS. 1 and 3, when the switch device 101 is in the non-operation position, the contact portion 57k of the movable contact 17 is disposed away from the insulating portion 18 on the distal end side of the switching fixed contact 15K. Has been. On the other hand, the contact portion 57c of the movable contact 17 is connected by sandwiching the common fixed contact 15C. For this reason, the connection terminal 55C and the connection terminal 55K are not electrically connected, and the switch device 101 is in the off state in the non-operating position.

  Next, when the operation portion 11t of the operation member 11 is pushed by an actuator (not shown) or the like, the movable contact 17 provided on the operation member 11 moves downward as the operation member 11 moves downward. Move to. The contact portion 57c of the movable contact 17 slides while sandwiching the common fixed contact 15C, and the contact portion 57k of the movable contact 17 comes into contact with the insulating portion 18 to sandwich the insulating portion 18.

  Further, when the operating member 11 is pushed in, the contact portion 57k of the movable contact 17 slides while sandwiching the insulating portion 18, and is then switched and fixed contact 15K provided so as to be flush with the insulating portion 18. The slidable contact surface 15p is sandwiched. 5, FIG. 6 and FIG. 8 show this sliding contact surface 15p. For this reason, the movable contact 17 and the switching fixed contact 15K are conducted, the common fixed contact 15C, the movable contact 17 and the switching fixed contact 15K are conducted through the conduction path, and the connection terminal 55C and the connection terminal 55K are conducted. The switch is turned on.

  When the pushing operation to the operation member 11 is released from this state, the movable contact 17 is pressed upward by the return biasing force of the return member 19, so that the operation member 11 is pushed together with the movable contact 17. It will return to the non-operation position. At this time, as the movable contact 17 is restored, the contact portion 57k of the movable contact 17 is separated from the switching fixed contact 15K and the insulating portion 18, and the switch of the switch device 101 is turned off.

  As described above, as shown in FIGS. 3, 5, and 8, the switch device 101 according to the present invention has a switching mechanism in which the contact portion 57 k slides before the contact portion 57 k of the movable contact 17 contacts the switching fixed contact 15 </ b> K. Since the switching fixed contact 15K is reached via the insulating portion 18 provided flush with the sliding contact surface 15p of the fixed contact 15K, the contact portion 57k that first holds the insulating portion 18 is the insulating portion 18 To smoothly come into contact with the switching fixed contact 15K. As a result, even if the positions of the switching fixed contact 15K and the contact portion 57k vary in the direction intersecting the direction of movement of the contact portion 57k (movable contact 17) (substantially orthogonal direction) (the left-right direction in FIG. 8). Since the contact portion 57k first clamps the insulating portion 18 to correct the variation, the switching fixed contact 15K and the contact portion 57k of the movable contact 17 can be brought into contact with each other at substantially the same position. Therefore, the movable contact 17 (contact portion) associated with the pushing operation of the operation member 11 is brought into the position of the contact portion 57k of the movable contact 17 and the position of the switching fixed contact 15K due to the influence of the dimensional variation of the member, the mounting error during assembly, and the like. 57k) in the direction intersecting with the moving direction (substantially orthogonal direction), that is, in the direction in which the pair of contact portions 57k face each other, the timing of switching from OFF to ON accompanying the pushing operation of the operation member 11 Accuracy can be improved.

  Further, as shown in FIGS. 9 and 10, since the insulating portion 18 is provided integrally with the standing portion 13s and extends from the standing portion 13s, the insulating portion is provided at the tip of the switching fixed contact 15K. 18 can be reliably arranged. Further, as compared with the case where the insulating portion 18 is provided as a single member, it is possible to prevent the displacement or dropping of the insulating portion 18 due to contact or sliding of the contact portion 57k of the movable contact 17 or the like. Can do. As a result, the contact portion 57k of the movable contact 17 can be reliably slidably contacted with the insulating portion 18 and the switching fixed contact 15K, so that the accuracy of the switching timing from OFF to ON can be further improved.

  As shown in FIGS. 9 and 10, the switching fixed contact 15 </ b> K, the connection terminal 55 </ b> K, and the middle portion, which are embedded in the base portion 13 k of the insulating base 13, have S-shaped curved portions 55 s. Yes. For this reason, the heat conduction is reduced with respect to the heat from the connection terminal 55K generated when the switch device 101 is mounted by soldering.

  In addition, as shown in FIGS. 3, 5, 9, and 10, the switching fixed contact 15K in a state where a part of the plate surface of the metal plate constituting the switching fixed contact 15K is in close contact with the standing portion 13s over the entire length. Is held by the insulating base 13, the switching fixed contact 15 </ b> K and the insulating portion 18 provided at the tip thereof can be brought into a flush state with high accuracy. As a result, the contact portion 57k can be smoothly slidably contacted from the insulating portion 18 to the switching fixed contact 15K, and the occurrence of bounce or the like can be prevented when the contact is switched. Therefore, the accuracy of the switching timing from OFF to ON can be further improved.

  As shown in FIG. 3, the return member 19 is constituted by a coil spring 19C. Further, the coil spring 19C is disposed so as to be between the common fixed contact 15C and the switching fixed contact 15K. Further, since the upper end portion of the coil spring 19C abuts on the back surface 17b of the coupling base portion 17j (see FIG. 7) and the coil spring 19C is interposed in a compressed state, the movable contact 17 is elastically biased upward by the coil spring 19C. Has been.

  As a result, the coil spring 19C as the return member 19 is disposed between the common fixed contact 15C and the switching fixed contact 15K, and the coil spring 19C biases the movable contact 17, so that the movable contact 17 is well balanced. The switching fixed contact 15K and the movable contact 17 can be arranged with high accuracy. As a result, the contact portion 57k of the movable contact 17 can be stably brought into contact with the switching fixed contact 15K, so that the accuracy of switching timing from OFF to ON can be further improved.

  Further, as shown in FIGS. 9 and 10, the boundary surface between the switching fixed contact 15K and the insulating portion 18 is provided with a convex portion 56 projecting toward the insulating portion 18 on the switching fixed contact 15K. The recess 16 into which the portion 56 is fitted is formed on the insulating portion 18 side. Further, as shown in FIG. 9, the longitudinal direction of the convex shape of the convex portion 56 is a direction along the same surface direction as the sliding contact surface 15p of the switching fixed contact 15K. Unlike the first embodiment, the concave portion 16 may be provided on the switching fixed contact 15K, and the convex portion 56 may be provided on the insulating portion 18.

  Thereby, the convex portion 56 is provided on one side of the switching fixed contact 15K and the insulating portion 18, and the concave portion 16 that fits the convex portion 56 is provided on the other side, whereby the switching fixed contact 15K and the insulating portion 18 are provided. Therefore, the switching fixed contact 15K and the insulating portion 18 provided at the tip thereof can be more accurately maintained in a flush state. Therefore, it is possible to maintain an accurate state of the switching timing from off to on for a long period of time.

  Further, as shown in FIGS. 3 and 6, on the outer wall of the base portion 13d of the insulating base 13, when the base portion 13d is viewed in plan, at a position facing the switching fixed contact 15K and the contact portion 57k, A locking rib 13r is formed. As shown in FIG. 3, the locking rib 13r is formed so as to extend in the extending direction of the two fixed contacts 15 (the switching fixed contact 15K and the common fixed contact 15C).

  Further, as shown in FIG. 1, the insulating base 13 and the case 14 are integrated to form the housing 12, but as shown in FIGS. 1 and 3, a base portion is provided in the storage portion 12s of the case 14. The position sizes of the locking rib 13r and the inner wall 14w of the case 14 are determined so that the locking rib 13r is deformed by the inner wall 14w (see FIG. 4) of the case 14 when the 13d is inserted.

  Accordingly, a locking rib 13r for locking the case 14 in which the guide portion 14g of the operation member 11 is formed and the insulating base 13 is provided on the outer wall of the base portion 13d provided on the insulating base 13, and this engagement is provided. Since the retaining ribs 13r are respectively disposed at positions facing each other across the switching fixed contact 15K and the contact portion 57k in plan view of the base portion 13d, the case 14 and the insulating base 13 can be accurately attached without rattling. Thus, the positional accuracy between the switching fixed contact 15K and the movable contact 17 can be improved. As a result, the accuracy of the switching timing from OFF to ON accompanying the pushing operation of the operating member 11 can be further improved.

  As shown in FIGS. 3 and 8, the contact portion 57 k is separated from the insulating portion 18 in a state where the operation member 11 is in the non-operation position. As a result, by repeating the switch operation, the contact tip made of, for example, silver or the switching fixed contact 15K constituting the movable contact 17 or the contact portion 57k of the movable contact 17 is worn, and the wear powder is moved to the movable contact 17 (contact portion 57k). Even if it is dragged to adhere to the insulating portion 18, the insulation between the switching fixed contact 15K and the movable contact 17 can be ensured. As a result, the reliability of the switch device 101 is improved and the life is extended.

  As shown in FIGS. 7 and 8, the pair of elastic arms 17w of the movable contact 17 is formed in a U shape, and the free end side that is not connected to the connection base portion 17j protrudes from the operation portion 11t. Extends in the direction. For this reason, it is possible to allow the insulating portion 18 to enter between the pair of contact portions 57A not from the free ends of the pair of elastic arm portions 17w but from the side connected to the connection base portion 17j. Accordingly, it is possible to prevent the pair of elastic arm portions 17w from being deformed by the contact between the pair of elastic arm portions 17w and the insulating portion 18 due to the influence of dimensional variation of components, attachment errors during assembly, and the like.

  As shown in FIG. 8, a guide surface 18g is provided at the tip of the insulating portion 18 so that the contact portion 57k is slidably contacted with the switching fixed contact 15K. For this reason, when a pair of contact part 57A clamps the insulation part 18, the insulation part 18 can be reached between a pair of contact part 57A smoothly and reliably. As a result, it is possible to more reliably prevent the pair of contact portions 57A and the insulating portion 18 from coming into contact with each other and deform the pair of contact portions 57A, and further suppress wear of the pair of contact portions 57A and the insulating portion 18. be able to.

[Second Embodiment]
FIG. 11 is a perspective view illustrating the switch device 102 according to the second embodiment of the present invention, and shows a state in which the operation member 11 is in the non-operation position. In FIG. 11, the case 14, the operation member 11, and the dustproof cover 111 are omitted for ease of explanation. FIG. 12 is a perspective view of the movable contact 27 for explaining the switch device 102 according to the second embodiment of the present invention. The pair of contact portions 77B are normally closed in the case of a member before assembling, but FIG. 12 shows the pair of contact portions 77B in an opened state for easy explanation. Moreover, the switch apparatus 102 differs in the movable contact 27 and the insulation part 28 with respect to 1st Embodiment. In addition, about the same structure as 1st Embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  The movable contact 27 has substantially the same configuration as the movable contact 17 of the first embodiment of the present invention, and is a conductive metal plate configured by bending a metal plate as shown in FIGS. A connecting base portion 17j formed in a flat plate shape, a pair of opposing elastic arm portions 17w connected to the connecting base portion 17j, and a contact portion 77B provided at the free end of the pair of elastic arm portions 17w Consists of. The pair of elastic arm portions 17w are formed at one end and the other end of the coupling base portion 17j corresponding to the switching fixed contact 15K and the common fixed contact 15C, respectively. However, the contact portion 77B does not use a contact tip made of silver, and the contact portion 77k on the switching fixed contact 15K side and the contact portion 77c on the common fixed contact 15C side are formed by bending the metal plate into a convex shape. Forming.

  As shown in FIG. 11, the insulating portion 28 is disposed on the extended distal end side of the switching fixed contact 15 </ b> K, and is provided integrally with the standing portion 13 s and extending from the standing portion 13 s. The insulating portion 28 is disposed so as to be flush with the sliding contact surface 15p of the switching fixed contact 15K on which the contact portion 77k slides. In the state where the operation member 11 is in the non-operation position, the contact portion 77k sandwiches the insulating portion 28. This point is different from the first embodiment of the present invention.

  As described above, the switch device 102 of the present invention is provided flush with the sliding contact surface 15p of the switching fixed contact 15K on which the contact portion 77k slides before the contact portion 77k of the movable contact 27 contacts the switching fixed contact 15K. Since the switching fixed contact 15K is reached via the insulating part 28, the contact part 77k that first holds the insulating part 28 slides on the insulating part 28 and smoothly contacts the switching fixed contact 15K. It becomes like this. As a result, even if the positions of the switching fixed contact 15K and the contact portion 77k vary in a direction (substantially orthogonal) intersecting the moving direction of the contact portion 77k (movable contact 27), the contact portion 77k is first formed. Since the variation is corrected by sandwiching the insulating portion 28, the switching fixed contact 15K and the contact portion 77k of the movable contact 27 can be brought into contact with each other at substantially the same position. Therefore, the position of the contact portion 77k of the movable contact 27 and the position of the switching fixed contact 15K intersect the moving direction of the movable contact 27 (contact portion 77k) due to the influence of the dimensional variation of the members, the mounting error during assembly, and the like. Even if there is a deviation in the direction (substantially orthogonal direction), that is, the direction in which the pair of contact portions 77k face each other, it is possible to improve the accuracy of the switching timing from OFF to ON due to the pushing operation of the operation member 11.

  Further, since the insulating portion 28 is provided integrally with the standing portion 13s and extends from the standing portion 13s, the insulating portion 28 can be reliably disposed at the tip of the switching fixed contact 15K. Further, as compared with the case where the insulating portion 28 is provided as a single member, it is possible to prevent the displacement or dropping of the insulating portion 28 due to contact or sliding of the contact portion 77k of the movable contact 27. Can do. As a result, the contact portion 77k of the movable contact 27 can be reliably slidably brought into contact with the switching fixed contact 15K, so that the accuracy of the switching timing from OFF to ON can be further improved.

  Further, since the switching fixed contact 15K is held by the insulating base 13 with a part of the plate surface of the metal plate constituting the switching fixed contact 15K being in close contact with the standing portion 13s over the entire length, the switching fixed contact 15K It is possible to make the insulating portion 28 provided at the tip thereof in a flush state with high accuracy. As a result, the contact portion 77k can be smoothly brought into sliding contact with the switching fixed contact 15K from the insulating portion 28, and occurrence of bounce or the like can be prevented when the contact is switched. Therefore, the accuracy of the switching timing from OFF to ON can be further improved.

  In addition, a coil spring 19C as a return member 19 is disposed between the common fixed contact 15C and the switching fixed contact 15K, and the coil spring 19C biases the movable contact 27, so that the movable contact 27 is well balanced. Therefore, the switching fixed contact 15K and the movable contact 27 can be arranged with high accuracy. As a result, the contact portion 77k of the movable contact 27 can be stably brought into contact with the switching fixed contact 15K, so that the accuracy of the switching timing from OFF to ON can be further improved.

  In addition, this invention is not limited to the said embodiment, For example, it can change and implement as follows, These embodiments also belong to the technical scope of this invention.

<Modification 1>
In the first embodiment, the insulating base 13 has a plate-like shape, but may be a box-like one with an open top. In that case, a plurality of fixed contacts are provided on the inner bottom wall portion of the box-like insulating base. 15 may be embedded. When a box-shaped insulating base is used, the guide portion 14g provided on the case 14 can be provided on the inner wall side surface of the box-shaped insulating base.

<Modification 2>
FIG. 13 is a diagram illustrating a second modification of the switch device 101 according to the first embodiment of the present invention, and is a perspective view of the movable contact 37. In the first embodiment, the movable contact 17 has a pair of elastic arm portions 17w formed in a U shape. However, as shown in FIG. 13, the pair of elastic arm portions 37w of the movable contact 37 is linear. It may be formed facing upward. In the movable contact 37 shown in FIG. 13, the connecting base portion 37j is not formed in a flat plate shape. Moreover, the contact part 97B does not have a contact tip like the contact part 77B of 2nd Embodiment. In the case of the movable contact 37 having such a configuration, the coil spring 19C (not shown) does not bias the movable contact 37 but biases the operation member 11.

<Modification 3>
In the above embodiment, the coil spring 19C is arranged so as to be between the two fixed contacts 15. However, the plurality of fixed contacts are gathered on one side and the return member such as the coil spring 19C is arranged on the other side. May be arranged.

<Modification 4>
In the above embodiment, the configuration is provided with two fixed contacts 15. However, the present invention is applied to a switch device having a normally closed type fixed contact as shown in FIG. 14 and having three or more fixed contacts. You may do it.

  In addition, the present invention can be implemented with various modifications without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 11 Operation member 11t Operation part 12 Housing | casing 12k Opening part 12s Storage part 13 Insulation base | substrate 13k Base part 13s Standing part 13d Stand part 13r Locking rib 14 Case 14g Guide part 15 Fixed contact 15K Switching fixed contact 15p Sliding contact surface 15C Common fixation Contact 16 Recess 56 Protrusion 17, 27, 37 Movable contact 57A, 57k, 57c, 77B, 77k, 77c, 97B Contact 17j, 37j Connection base 17w, 37w Elastic arm 18, 28 Insulation 18g Guide 19 Restoring member 19C Coil spring 101, 102 Switch device

Claims (8)

An operation member having an operation part to be pushed in, a housing having an opening for projecting the operation part, and a storage part for storing the operation member so as to be able to reciprocate, and disposed in the storage part. A plurality of fixed contacts, a movable contact provided on the operating member for switching a conduction state between the plurality of fixed contacts and having a contact portion for sandwiching the plurality of fixed contacts, and an operation for pushing the operating member In a switch device provided with a return member that returns to a non-operation position before being performed,
At least one of the plurality of fixed contacts is a switching fixed contact in which the contact portion of the movable contact is brought into contact with or separated from the reciprocating movement of the operation member,
An insulating portion is provided on the front end side of the switching fixed contact that extends into the storage portion so as to be flush with the sliding contact surface of the switching fixed contact on which the contact portion slides.
A switch device characterized in that, when the contact portion comes into contact with the switching fixed contact in accordance with the pushing operation of the operation member, the contact portion reaches the switching fixed contact via the insulating portion. . The housing includes an insulating base that extends and holds the plurality of fixed contacts in the storage portion,
The insulating base includes a base portion in which the plurality of fixed contacts are embedded, and a standing portion that is erected on the base portion so as to extend along the switching fixed contact and extends longer than the extended tip of the switching fixed contact. And having
2. The switch device according to claim 1, wherein the insulating portion is provided integrally with the standing portion and extends from the standing portion to a distal end side of the switching contact. The switching fixed contact is formed of a metal plate,
In a state in which at least a part of the plate surface of the metal plate constituting the switching fixed contact extending into the storage portion is in close contact with the standing portion over the entire length of the switching fixed contact located in the storage portion, The switch device according to claim 2, wherein a switching fixed contact is held by the insulating base.   On the boundary surface between the switching fixed contact and the insulating portion, a convex portion projecting to the other side is provided on one side of the switching fixed contact and the insulating portion, and the convex portion is fitted. The switch device according to claim 2 or 3, wherein the mating recess is formed on the other side. The housing includes a case that is integrated with the insulating base and has a guide portion that guides the operation member in a reciprocating manner in the storage portion.
The insulating base has a base part inserted into the housing part of the case, and is opposed to the outer wall of the base part with the switching fixed contact and the contact part sandwiched in plan view of the base part. The locking ribs are formed so as to extend in the extending direction of the plurality of fixed contacts, respectively,
5. The structure according to claim 2, wherein the locking rib is deformed by an inner wall of the case when the base portion is inserted into the storage portion of the case. 6. The switch device according to 1. The movable contact is configured by bending a metal plate, and includes a connection base and a pair of elastic arm portions opposed to each other connected to the connection base.
The movable contact is provided with a plurality of the pair of elastic arm portions corresponding to each of the plurality of fixed contacts, and the free ends of the pair of elastic arm portions are directed toward the protruding direction of the operation portion. In addition, the contact portions are provided at the distal end portion on the free end side, and in a state where the operation member is in the non-operation position, the contact portions are disposed in the storage portion of the switching fixed contact. It is arranged on the tip side extended to
The insulating portion is provided with a guide surface that becomes narrower as the distance from the switching fixed contact increases, and the contact portion is configured to be in sliding contact with the guide surface. Item 6. The switch device according to any one of Items 5.   The switch device according to claim 1, wherein the contact portion is separated from the insulating portion in a state where the operation member is in the non-operation position.   Among the plurality of fixed contacts, one different from the switching fixed contact is a common fixed contact, the return member is constituted by a coil spring, and the coil spring is connected to the common fixed contact and the switching fixed contact. The switch device according to claim 1, wherein the coil spring biases the movable contact.