JP5848219B2 - Press switch device - Google Patents

Description

  The present invention relates to a push-type switch device, and more particularly, to a push-type switch device including a snap action mechanism that operates in response to a push operation on an operation member.

  Conventionally, in a push-type switch device that receives a pressing operation on an operation member, a lever that is provided with a common fixed terminal piece, a normally closed fixed terminal piece, and a normally open fixed terminal piece that are fixed to a case, A structure in which a snap action mechanism is constituted by a movable piece provided with a movable contact and a compression spring has been proposed (for example, see Patent Document 1). In this pressing type switch device, a fixed contact is provided opposite to the base ends of the normally closed fixed terminal piece and the normally open fixed terminal piece, and the movable piece is moved by a snap action by a snap action mechanism. The contact state with is switched.

Japanese Patent Laid-Open No. 2002-358858, FIG.

  However, in the conventional press-type switch device described above, the movement of the movable piece depends only on the spring force generated from the compression spring, so that a force greater than the spring force cannot be applied to the movable piece. For this reason, when the movable contact is fixed to one fixed contact with a force greater than the spring force due to some factor, the movable contact cannot be separated from the fixed contact. As a result, there is a problem that the conduction state between the movable contact and the fixed contact cannot be switched stably.

  The present invention has been made in view of such problems, and provides a pressing switch device including a snap action mechanism that can stably switch a conduction state between a fixed contact and a movable contact. For the purpose.

  A pressing switch device according to the present invention includes a housing having a storage portion, an operation member that receives a pressing operation, a fixed contact terminal having a common contact terminal and a switching contact terminal provided in the storage portion, and the switching contact terminal. A pressing switch device comprising a movable contact that contacts and separates and a snap action mechanism that drives the movable contact when the operation member is pressed to a predetermined position, wherein the common contact terminal is disposed in the storage portion. The snap action mechanism is configured such that the one end side is supported on the common contact terminal by a first rotation fulcrum and the movable contact is provided on the other end side of the conductor member. A driving member whose one end is engaged at the second rotation fulcrum, and a third rotation fulcrum located on the first rotation fulcrum side on the other end of the driving member. And an urging member whose other end is locked to a fixed base integrated with the housing at a fourth rotation fulcrum located on the second rotation fulcrum side, and the snap action The mechanism is configured such that a part of the driving member or the urging member disposed on the third rotation fulcrum side is pressed in response to a pressing operation on the operation member, and the driving member is The second rotation fulcrum is moved by rotating with a fifth rotation fulcrum arranged on the opposite side of the first rotation fulcrum from the fulcrum as a rotation fulcrum.

  According to this press-type switch device, the drive member rotates around the fifth rotation fulcrum arranged outside the second rotation fulcrum in response to the pressing operation on the operation member. Since the movable contact provided on the conductor member engaged with the drive member can be moved at the second rotational fulcrum in accordance with the pressing operation on the operation member, the movable contact is fixed. Even when it is fixed to a part of the base, the pressing force against the operating member is directly transmitted and it can be forcibly separated from the part of the fixed base, so that the conduction state between the fixed contact and the movable contact is stabilized. Can be switched. In addition, since the dynamic friction state is shifted to the reversing operation instead of the static friction state to the reversing operation, the friction can be reduced and the variation of the operating points can be suppressed.

  In the press-type switch device, the snap action mechanism includes the driving member or the urging member disposed on the opposite side of the second rotation fulcrum and the fourth rotation fulcrum with the common contact terminal interposed therebetween. It is preferable to receive the pressing force of the operating member at a part of the head. In this case, the operation is performed at a position opposite to the second rotation fulcrum constituting the rotation fulcrum of the driving member and the fourth rotation fulcrum constituting the rotation fulcrum of the biasing member with the common contact terminal as a reference. Since the pressing force can be received from the member, it is possible to secure the length of the point of the pressing force from the operation member and the second rotation fulcrum or the fourth rotation fulcrum. It becomes possible to lengthen the stroke.

  In the pressing switch device, it is preferable that the snap action mechanism arranges the fourth rotation fulcrum on the opposite side of the first rotation fulcrum with the switching contact terminal interposed therebetween. In this case, since the 4th rotation fulcrum which comprises the rotation fulcrum of a biasing member is arrange | positioned in the position on the opposite side to a 1st rotation fulcrum on the basis of a switching contact terminal, for example, urging | biasing When the member is constituted by a compression spring, the spring length can be designed to be long, so that it is possible to extend the life of the compression spring by distributing the load applied to the compression spring.

  Furthermore, in the press-type switch device, it is preferable that the snap action mechanism forms the first rotation fulcrum on a part of an end surface of the common contact terminal on the switching contact terminal side. In this case, since the first rotation fulcrum, which is the rotation fulcrum of the conductor member, is formed on a part of the end surface of the common contact terminal, conduction between the common contact terminal and the conductor member can be achieved with a simple configuration. The conductor member can be rotated while making it possible.

  Furthermore, in the press-type switch device, the drive member includes a base portion extending from one end side of the drive member along a direction parallel to a moving direction of the operation member, and the base portion to the other end side of the drive member. A side wall portion comprising a main body portion extending in a direction intersecting with the moving direction of the operation member and connected to the other end side of the drive member; and forming a recess on the common contact terminal side of the base portion, It is preferable that the second rotation fulcrum is formed by engaging the other end of the conductor member with the recess. In this case, since the second rotation fulcrum, which is the rotation fulcrum of the conductor member, is formed on a part of the side wall portion constituting the drive member, the conductor member can be rotated with a simple configuration. It becomes possible.

  Furthermore, in the above pressing switch device, the urging member is constituted by a compression spring made of a leaf spring, and a pair of long side portions extending in a direction intersecting with the moving direction of the operation member, and the pair of long lengths. A pair of connecting portions provided at end portions of the side portions, and a part of the long side portion in the vicinity of one of the connecting portions is bent to the operation member side and locked to the fixed base. Is preferred. In this case, since a part of the long side portion near one of the connecting portions is bent toward the operation member side and locked to the fixed base, the spring length of the compression spring can be designed to be long. It is possible to extend the life of the compression spring by distributing the applied load.

  Furthermore, in the pressing switch device, it is preferable that the movable contact is a sliding contact that slides on a surface of the switching contact terminal. In this case, since the movable contact is composed of a sliding contact, dust or the like on the surface of the switching contact terminal can be removed when the movable contact is driven by the snap action mechanism. Contact stability can be ensured.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the press-type switch apparatus provided with the snap action mechanism which can switch the conduction | electrical_connection state between a fixed contact and a movable contact stably.

It is a perspective view which shows the external appearance of the press type switch apparatus which concerns on one embodiment of this invention. It is a disassembled perspective view of the press type switch device concerning the above-mentioned embodiment. It is a perspective view of the fixed base which the press type switch device concerning the above-mentioned embodiment has. It is a disassembled perspective view of the snap action mechanism which the press type switch device concerning the above-mentioned embodiment has. It is a perspective view at the time of attaching a snap action mechanism to the fixed base which the press type switch device concerning the above-mentioned embodiment has. It is a top view at the time of attaching a snap action mechanism to the fixed base which the press type switch device concerning the above-mentioned embodiment has. It is a sectional side view of the press type switch device concerning the above-mentioned embodiment. It is explanatory drawing of the force which acts with respect to the rotation fulcrum of each structural member of the snap action mechanism which the press type switch apparatus which concerns on the said embodiment has, and each structural member. It is explanatory drawing of the snap action mechanism of the state immediately before reversing in the press type switch apparatus which concerns on the said embodiment. It is explanatory drawing of the snap action mechanism of the state immediately after inversion in the press type switch apparatus which concerns on the said embodiment. In the push-type switch device according to the embodiment, it is an explanatory view of the snap action mechanism in a state where the operation member is pressed to the lowest position. In the push-type switch device according to the embodiment, it is an explanatory diagram of a snap action mechanism in a state immediately before reversing at the time of return. In the push-type switch device according to the above-described embodiment, it is an explanatory view of a snap action mechanism in a state immediately after being reversed upon return.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a perspective view showing an external appearance of a press-type switch device (hereinafter simply referred to as “switch device”) 1 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the switch device 1 according to the present embodiment. In the following, for convenience of explanation, the upper side shown in FIGS. 1 and 2 is referred to as “upper side of the switch device 1” or simply “upper side”, and the lower side shown in FIGS. 1 "lower side" or simply "lower side".

  As shown in FIG. 1, the switch device 1 according to the present embodiment projects a part of an operation member 4 to be described later from a part of an upper surface part of a box-shaped housing 2, and an operator or the like at the projecting part. It is comprised so that pressing operation may be received. A cover C for preventing intrusion of foreign matter such as dust and water into the housing 2 is attached to a part of the operation member 4 protruding from the housing 2. In FIG. 2 and subsequent drawings, the cover C is omitted for convenience of explanation.

  As shown in FIG. 2, the switch device 1 includes a housing 2 formed by molding an insulating resin material, for example. The housing 2 includes a case 21 having a box shape opened to the lower side and a fixed base 22 having a shape corresponding to the opening of the case 21 and constituting the inner bottom surface of the switch device 1. By combining the case 21 and the fixed base 22, a housing portion for housing the constituent members of the switch device 1 is formed inside the housing 2.

  On the upper surface of the case 21, an opening 211 is formed through which an upper end portion of a shaft portion 42 of the operation member 4 described later can pass. The fixed base 22 has a rectangular shape in a top view, and a protruding surface 221 having a shape corresponding to the opening of the case 21 is provided on the upper surface. The case 21 is appropriately positioned by accommodating the protruding surface 221 with an opening. For example, the case 21 is integrated with the fixed base 22 by being fixed with an adhesive or the like in a state where the protruding surface 221 is accommodated. A projecting piece 222 is provided at one end of the projecting surface 221 (the right side end shown in FIG. 2) so as to project upward.

  A part of the fixed contact terminal 3 fixed to the fixed base 22 is disposed in the storage portion formed in the housing 2, and a part of the operation member 4 that receives a pressing operation by an operator or the like and the operation member A snap action mechanism 5 that operates in response to a pressing operation on 4 is accommodated. As will be described later in detail, the snap action mechanism 5 includes a movable contact 6, a drive plate 7, a conductor plate 8, and a compression spring 9 including a plate spring.

  The fixed contact terminal 3 includes a metal common contact terminal 31 and a switching contact terminal 32 that are insert-molded on the fixed base 22. The common contact terminal 31 is provided on the upper side of the fixed base 22 so as to extend in the vertical direction, and the common contact terminal 311 (311a, 311b) is provided on the side opposite to the switching contact terminal 32 from the lower end of the common contact part 311. And a terminal portion 312 extending downward from the end portion thereof. The common contact portion 311 is composed of a pair of common contact portions 311a and 311b which are branched at the upper end portion in a direction orthogonal to the longitudinal direction of the fixed base 22. On the other hand, the switching contact terminal 32 includes a switching contact portion 321 that protrudes upward from the fixed base 22 and a terminal portion 322 that extends downward in a region below the switching contact portion 321. Yes.

  The operation member 4 is formed, for example, by molding an insulating resin material, and has a base portion 41 having a generally rectangular shape in a top view, and a columnar shaft portion erected on the upper surface of one end portion of the base portion 41. 42. The base 41 is provided with side portions 43 corresponding to three sides other than the one side on which the shaft portion 42 is provided. Among these side surface portions 43, rib portions 432 extending in the vertical direction are provided on the outer wall surfaces of a pair of opposing side surface portions 431. These rib portions 432 are configured to be guided by guide grooves 214 of the case 21 described later. The shaft portion 42 is disposed so that the upper end portion thereof protrudes from the opening portion 211 of the case 21 and receives a pressing operation from an operator or the like.

  Here, the structure of the fixed base 22 and the snap action mechanism 5 which the switch apparatus 1 which concerns on this Embodiment has is demonstrated. FIG. 3 is a perspective view of the fixed base 22 included in the switch device 1 according to the present embodiment. FIG. 4 is an exploded perspective view of the snap action mechanism 5 included in the switch device 1 according to the present embodiment. 3 shows the fixed base 22 in a state where the fixed contact terminals 3 are integrated.

  As shown in FIG. 3, in the fixed base 22, the fixed contact terminal 3 is embedded with a part thereof protruding from the protruding surface 221 along the long side direction of the fixed base 22. The common contact terminal 31 is disposed so that the common contact portion 311 (311a, 311b) extends from the upper surface of the protruding surface 221 while the terminal portion 312 extends from the lower surface of the fixed base 22. Similarly, the switching contact terminal 32 is arranged so that the switching contact portion 321 extends from the upper surface of the protruding surface 221, while the terminal portion 322 extends from the lower surface of the fixed base 22. That is, the common contact terminal 31 (common contact portion 311) and the switching contact terminal 32 (switching contact portion 321) are provided in a storage portion formed by the housing 2 while standing on the fixed base 22. .

  A concave portion 313 that opens to the switching contact terminal 32 side is provided in the vicinity of the distal end portion of the common contact portions 311a and 311b that are bifurcated. These recesses 313 accommodate a part of one end side of the conductor plate 8 (an engaging portion 802a of the conductor plate 8 described later). As will be described in detail later, the conductor plate 8 is configured to be rotatable at a part accommodated in the recess 313. That is, one rotation fulcrum (first rotation fulcrum A) of the conductor plate 8 described later is configured by the contact position with the conductor plate 8 in the recess 313.

  The switching contact portion 321 is disposed inside the protruding piece 222 (on the common contact terminal 31 side). The switching contact portion 321 is integrated with a plate-like portion 222 a constituting the protruding piece 222 in a state where it is insert-molded on the fixed base 22. A protruding piece 222b is provided in the vicinity of the center of the upper end surface of the plate-like portion 222a so as to protrude upward. On the other hand, one end portion (the right side end portion shown in FIG. 3) of the upper end surface of the plate-like portion 222a is provided with a locking piece 222c protruding upward. The locking piece 222 c plays a role of locking the other end of the compression spring 9. On the other hand, the protruding piece 222b serves to prevent the compression spring 9 from falling off.

  As shown in FIG. 4, the snap action mechanism 5 includes a drive plate 7 as a drive member formed by performing blanking and bending on a conductive metal plate, and blank processing on a conductive metal plate. A conductor plate 8 as a conductor member formed by applying, and a compression spring 9 as a biasing member formed by blanking and bending a metal plate material having elasticity. Hereinafter, the configurations of the drive plate 7, the conductor plate 8, and the compression spring 9 will be described.

  The drive plate 7 generally includes a pair of side wall portions 701 extending in a direction intersecting the moving direction of the operation member 4, a first connection portion 702 that connects one end portions of these side wall portions 701, and the other end portions. And a second connecting portion 703 for connecting the two. The pair of side wall portions 701 are connected to the base portion 701a extending along the vertical direction of the switch device 1 (moving direction of the operation member 4) below the second connecting portion 703 and the lower end portion of the base portion 701a. A main body 701b extending in a direction crossing the moving direction of the operation member 4 on the side of the portion 702, and arranged opposite to each other with a certain distance therebetween. Each of the first connecting portion 702 and the second connecting portion 703 has a flat plate shape.

  A recess 702a is formed inside the first connecting portion 702. The recess 702a plays a role of locking one end of a compression spring 9 described later. On the other hand, a protruding piece 703 a is provided outside the second connecting portion 703. As will be described in detail later, the protruding piece 703a plays a role of positioning the drive plate 7 in contact with a ceiling surface 212 of the case 21 described later in an initial state where the operation member 4 is not subjected to a pressing operation.

  In addition, a concave portion 703b that opens to the common contact terminal 31 side (first connection portion 702 side) is provided below the second connection portion 703 in the pair of side wall portions 701 (base portion 701a). These recesses 703b accommodate a part of the other end side of the conductor plate 8 (an engaging portion 802b of the conductor plate 8 described later). As will be described in detail later, the conductor plate 8 is configured to be rotatable at a part accommodated in the recess 703b. That is, the other rotation fulcrum (second rotation fulcrum B) of the conductor plate 8 described later is configured by the contact position with the conductor plate 8 in the recess 703b. An opening 704 is provided between the pair of side wall portions 701 and the first and second connecting portions 702 and 703.

  The conductor plate 8 has a generally flat plate shape, and has a base portion 801 extending in a direction intersecting the moving direction of the operation member 4 and a pair of arm portions 802 provided extending from the base portion 801. The base 801 has a generally rectangular shape when viewed from above. The pair of arm portions 802 are provided on the right end side of the base portion 801 (on the second connecting portion 703 side of the drive plate 7), and the position spaced apart from the base portion 801 by a certain distance is on the left end portion side (the first connecting portion of the drive plate 7). Part 702 side). A slit portion 803 is provided between the base portion 801 and each arm portion 802.

  An engaging portion 802 a is provided in the vicinity of the distal end portion of the pair of arm portions 802. These engaging portions 802a engage with the concave portions 313 provided in the common contact portions 311a and 311b constituting the common contact terminal 31 in a state where the switch device 1 is assembled. On the other hand, an engaging portion 802b is provided in the vicinity of the end portion of the conductor plate 8 located on the opposite side of these engaging portions 802a. These engaging portions 802b engage with recesses 703b provided in the side wall portion 701 constituting the drive plate 7 in a state where the switch device 1 is assembled.

  A movable contact 6 is attached to the lower surface of the base 801. The movable contact 6 is formed by performing blanking and bending on a conductive metal plate material, and has a base portion 601 having a flat plate shape and a pair of movable contact portions 602 provided to hang from a side end portion of the base portion 601. 603. For example, the movable contact 6 is fixed by welding the upper surface of the base 601 to the lower surface of the base 801 of the conductor plate 8. The method for fixing the movable contact 6 to the conductor plate 8 can be changed as appropriate.

  The movable contact portions 602 and 603 have a shape in which the distal end portion extends downward and is bent toward the distal end side of the arm portion 802 of the conductor plate 8 and folded back to the base portion 801 side. The movable contact portions 602 and 603 are disposed at positions where the movable contact portions 602 and 603 can pass through the opening 704 provided in the drive plate 7. Clamping portions 604 and 605 are provided at the front end portions of the movable contacts 602 and 603 so as to face each other with a certain distance therebetween (the clamping portion 605 is not shown in FIG. 4). The sandwiching portions 604 and 605 are configured to be able to sandwich a part of the switching contact portion 321 of the switching contact terminal 32 and a plate-like portion 222a in the vicinity of the switching contact portion 321. And according to the movement of the conductor plate 8 accompanying the press operation with respect to the operation member 4, it is comprised so that the surface of the switching contact part 321 can slide. That is, the movable contact 6 constitutes a sliding contact that slides on the switching contact portion 321. Since the movable contact 6 is configured as a sliding contact in this way, dust or the like on the surface of the switching contact portion 321 can be removed when the movable contact 6 is driven by the snap action mechanism 5, so that the movable contact 6 and the switching contact terminal 32 can be removed. It is possible to improve the reliability of the conductive connection between the fixed contact terminals 3 (between the common contact terminal 31 and the switching contact terminal 32).

  The compression spring 9 is subjected to a blanking process on a long metal plate material having elasticity and formed into an annular shape, and then subjected to a bending process. The compression spring 9 includes a pair of long side portions 901 extending in a direction intersecting the moving direction of the operation member 4, a first connecting portion 902 that connects one end portions of the long side portion 901, and the other end portions. And a second connecting portion 903 for connecting the two. These long side portions 901 and first and second connecting portions 902 and 903 are provided, and the compression spring 9 has a generally U shape in a side view (see FIG. 8).

  The first connecting part 902 extends in the extending direction of the long side part 901, and the vicinity of the tip part is bent upward so as to intersect the extending direction of the long side part 901. In addition, an engagement piece 902b is provided at the tip of the first connecting portion 902 via a constricted portion 902a. The constricted portion 902a and the engaging piece 902b are configured to be engageable with a recess 702a provided in the first connecting portion 702 of the drive plate 7. That is, in a state where the engagement piece 902b is disposed on the upper side of the first connection portion 702, the first connection portion 702 of the drive plate 7 and the first connection of the compression spring 9 are accommodated by housing the constricted portion 902a in the recess 702a. Part 902 engages.

  On the other hand, a part of the long side portion 901 in the vicinity of the second connecting portion 903 intersects (orthogonal) with the extending direction of the long side portion 901 and is bent upward. The 2nd connection part 903 connects the front-end | tip parts of the long side part 901 extended to the upper side. The second connecting portion 903 has a flat plate shape and is provided extending in the vertical direction. A pair of shoulder portions 904 (904a, 904b) is provided on the side of the second connecting portion 903. These shoulder portions 904a and 904b are configured to be able to come into contact with a regulating piece 213 of the case 21, which will be described later, when the snap action mechanism 5 is housed in the housing 2.

  As will be described in detail later, the compression spring 9 is locked to the drive plate 7 or a part of the protruding piece 222 of the fixed base 22 at a part of the portion bent toward the operation member 4 side. In the snap action mechanism 5 according to the present embodiment, the vicinity of both end portions of the compression spring 9 is bent toward the operation member 4 in this way, and the drive plate 7 or a part of the protruding piece 222 of the fixed base 22 is engaged. Since the spring length of the compression spring 9 can be designed to be longer, the load applied to the compression spring 9 can be distributed to extend the life of the compression spring 9.

  An opening 905 is formed in the compression spring 9 inside the pair of long side portions 901. The opening 905 is configured to have a dimension through which the movable contact 6 (movable contact portions 602 and 603) fixed to the conductor plate 8 can pass in a state where the snap action mechanism 5 is assembled. The second connecting portion 903 is provided with a recess 906 that is continuous with the opening 905. The recess 906 has a shape that opens downward. The recess 906 is formed to have a size that can accommodate the upper end of the protruding piece 222 of the fixed base 22.

  5 and 6 are a perspective view and a top view, respectively, when the snap action mechanism 5 is attached to the fixed base 22 of the switch device 1 according to the present embodiment. 5 and 6 show the snap action mechanism 5 in an initial state where no pressing operation is performed on the switch device 1 according to the present embodiment.

  The snap action mechanism 5 is supported by the fixed contact terminal 3 integrated with the fixed base 22 and the fixed base 22 in a state where the drive plate 7, the conductor plate 8 and the compression spring 9 are combined. It is arranged at the position (initial position) in the initial state shown in FIG. As shown in FIG. 5, the case 21 and the operation member 4 are attached to the fixed base 22 on which the snap action mechanism 5 is arranged. The snap action mechanism 5 comes into contact with the case 21 and a part of the operation member 4 and is stably held in the state where the initial position is maintained in the housing portion of the housing 2.

  As shown in FIGS. 5 and 6, the conductor plate 8 is held between the common contact portions 311 a and 311 b integrated with the fixed base 22 and the drive plate 7. More specifically, the conductor plate 8 engages the engaging portion 802a provided at the distal ends of the pair of arm portions 802 with the concave portion 313 provided in the common contact portions 311a and 311b, while the engaging portion 802b. Is held in a state of being engaged with a recess 703 b provided in the vicinity of the second connecting portion 703 of the drive plate 7. In the initial state, the conductor plate 8 is held in a state where a part of the side wall portion 701 of the drive plate 7 is accommodated by the slit portion 803.

  The compression spring 9 is held between the drive plate 7 and the protruding piece 222 of the fixed base 22. More specifically, the compression spring 9 engages the engagement piece 902 b provided in the first connection portion 902 with the recess 702 a provided in the first connection portion 702 of the drive plate 7, while protruding at the recess 906. The piece 222 is accommodated and held in a state where the outer surface portion of the second connecting portion 903 is locked to the locking piece 222c. The compression spring 9 is in a state in which a pair of shoulder portions 904a and 904b are in contact with a regulating piece 213 of the case 21 described later (see FIG. 7).

  The drive plate 7 is held by a compression spring 9. More specifically, the drive plate 7 accommodates the constricted portion 902a of the compression spring 9 in the concave portion 702a provided in the first connecting portion 702, while the side wall portion 701 extends to the switching contact terminal 32 side. Is held by. In the initial state, a force that biases the protruding piece 703a provided in the second connecting portion 703 upward acts on the drive plate 7, and a part of the protruding piece 703a is ceiling of the case 21, which will be described later. The surface 212 is in contact with the surface 212 (see FIG. 7).

  The movable contact 6 attached to the conductor plate 8 is in a state where the movable contact portions 602 and 603 are arranged outside the plate-like portion 222a of the protruding piece 222 (see FIG. 5). In the initial state, the sandwiching portions 604 and 605 provided in the movable contact portions 602 and 603 sandwich a part of the plate-like portion 222 a on the upper side of the switching contact portion 321. As described above, the plate-like portion 222a constituting the protruding piece 222 is formed of an insulating resin material. For this reason, the common contact terminal 31 and the switching contact terminal 32 are in a non-conductive state.

  In the compression spring 9, the movement on the right end side (second connection portion 903 side) shown in FIGS. 5 and 6 is restricted by a restriction piece 213 of the case 21 described later, while the left end portion shown in FIGS. 5 and 6 is used. It is held by the drive plate 7 in a compressed state on the side (first connecting portion 902 side). For this reason, the compression spring 9 is in a state where a force for opening the first and second connecting portions 902 and 903 (hereinafter, referred to as “elastic return force” as appropriate) is applied in the initial state. The snap action mechanism 5 uses the elastic return force of the compression spring 9 to reverse when the operation member 4 is pressed to a certain position, and can return to the initial state when the pressing operation is released. It is configured.

  Here, the positional relationship between the snap action mechanism 5 included in the switch device 1 according to the present embodiment and the surrounding constituent members will be described with reference to FIG. FIG. 7 is a side sectional view of the switch device 1 according to the present embodiment. In FIG. 7, a cross section passing through the center line in the moving direction (vertical direction) of the operation member 4 is shown. Further, FIG. 7 shows the switch device 1 in an initial state where no pressing operation is performed.

  In the initial state, the drive plate 7 is disposed such that the right side end portion shown in FIG. 7 is located above the left side end portion. In this case, the second connecting portion 703 is disposed at a position higher than the first connecting portion 702. The second connecting portion 703 is positioned in a state in which the protruding piece 703 a is in contact with the ceiling surface 212 of the case 21. Similarly, the conductor plate 8 is disposed so that the right side end portion shown in FIG. 7 is located above the left side end portion.

  On the other hand, the compression spring 9 is disposed such that the left side end portion shown in FIG. 7 is located above the right side end portion. In this case, the 1st connection part 902 is arrange | positioned in the position higher than the 2nd connection part 903. FIG. The engaging piece 902 b provided in the first connecting portion 902 protrudes upward through the recess 702 a of the first connecting portion 702 of the drive plate 7. On the other hand, the second connecting portion 903 is locked to a locking piece 222 c provided on the protruding piece 222. The compression spring 9 has a state in which a pair of shoulder portions 904a and 904b disposed on the side of the second connecting portion 903 is urged from above by a restriction piece 213 provided on the inner wall surface of the case 21. It has become.

  The operation member 4 is disposed above the snap action mechanism 5. The operation member 4 is disposed in a state where the lower surface of the shaft portion 42 is placed on the engagement piece 902 b provided in the first connection portion 902 of the compression spring 9. The operation member 4 is guided by guide grooves 214 provided on the inner wall surface of the case 21 so as to extend in the vertical direction on the rib portions 432 provided on the pair of side surface portions 431 facing each other. Thus, the operation member 4 is configured to be movable in the vertical direction in accordance with a pressing operation from the operator.

  In the switch device 1 according to the present embodiment, the first connecting portion 902 provided on one end side (left end side shown in FIG. 7) of the compression spring 9 is part of the common contact terminal 31 (common contact portions 311a, 311b). ) Outside (on the left side shown in FIG. 7). On the other hand, the second connecting portion 903 provided on the other end side (the right end side shown in FIG. 7) of the compression spring 9 is outside the part (the switching contact portion 321) of the switching contact terminal 32 (the right side shown in FIG. 7). Side). For this reason, since the spring length of the compression spring 9 can be designed to be long even in a limited space within the housing portion of the housing 2, the load applied to the compression spring 9 can be distributed to extend the life. .

  Here, the rotation fulcrum of each component of the snap action mechanism 5 included in the switch device 1 according to the present embodiment and the force acting on each component will be described. FIG. 8 is an explanatory diagram of the rotation fulcrum of each component of the snap action mechanism 5 included in the switch device 1 according to the present embodiment and the force acting on each component. 8 shows the snap action mechanism 5 in the initial state, and the case 21 and the operation member 4 are omitted for convenience of explanation.

  As shown in FIG. 8, the conductor plate 8 is accommodated in a recess 313 provided in the common contact portions 311a and 311b by an engaging portion 802a provided at the distal end portion of the pair of arm portions 802. The apex of the joint portion 802a is configured to be rotatable about the first rotation fulcrum A. On the other hand, the conductor plate 8 is accommodated in a recess 703b provided in the vicinity of the second connecting portion 703 of the drive plate 7 by a pair of engaging portions 802b provided on the opposite side to these engaging portions 802a. The top of these engaging portions 802b is configured to be rotatable with the second rotation fulcrum B as a second rotation fulcrum B.

  The compression spring 9 is engaged with the first connection portion 702 of the drive plate 7 by an engagement piece 902 b provided on the first connection portion 902, and one of the engagement pieces 902 b that comes into contact with the first connection portion 702. The portion is configured to be rotatable with the third rotation fulcrum C as a third rotation fulcrum. On the other hand, the compression spring 9 is locked to the locking piece 222c provided on the protruding piece 222 of the fixed base 22 by the second connecting portion 903, and one of the second connecting portions 903 that contacts the locking piece 222c. The portion is configured to be rotatable with a fourth rotation fulcrum D.

  The second rotation fulcrum B and the third rotation fulcrum C described above also function as the rotation fulcrum of the drive plate 7. That is, the drive plate 7 is configured to be rotatable at the second rotation fulcrum B and the third rotation fulcrum C. The drive plate 7 is in contact with the ceiling surface 212 of the case 21 at the second connecting portion 703, and a part of the second connecting portion 703 (projecting piece 703a) in contact with the ceiling surface 212 is the first. 5 is configured to be rotatable as a rotation fulcrum E. The fifth rotation fulcrum E functions as a temporary rotation fulcrum of the drive plate 7 when the operation member 4 is pressed from the initial state.

  The first rotation fulcrum A is formed on a part of the end surface of the common contact terminal 31 on the switching contact terminal 32 side. As described above, since the first rotation fulcrum A, which is the rotation fulcrum of the conductor plate 8, is formed on a part of the end surface of the common contact terminal 31, the common contact terminal 31, the conductor plate 8, It is possible to rotate the conductor plate 8 while enabling the conduction. Further, the second rotation fulcrum B is formed in a part of the side wall portion 701 constituting the drive plate 7. Thus, since the 2nd rotation fulcrum B which is the rotation fulcrum of the conductor plate 8 is formed in a part of the side wall part 701, it becomes possible to rotate the conductor plate 8 by simple structure. Further, the fourth rotation fulcrum D is arranged on the opposite side to the first rotation fulcrum A with the switching contact terminal 32 interposed therebetween. Since the fourth rotation fulcrum D constituting the rotation fulcrum of the compression spring 9 is arranged at the position opposite to the first rotation fulcrum A with the switching contact terminal 32 as a reference, the compression spring 9 Therefore, the load applied to the compression spring 9 can be distributed.

  In the initial state, the first rotation fulcrum A is disposed below the second rotation fulcrum B and the third rotation fulcrum C, and is disposed above the fourth rotation fulcrum D. ing. That is, the first rotation fulcrum A is disposed below the straight line connecting the second rotation fulcrum B and the third rotation fulcrum C. Moreover, the 2nd rotation fulcrum B is arrange | positioned most among the 1st-4th rotation fulcrum AD. Further, the third rotation fulcrum C is disposed below the second rotation fulcrum B, and is disposed above the first rotation fulcrum A and the fourth rotation fulcrum D. . Further, the fourth rotation fulcrum D is disposed on the lowermost side among the four rotation fulcrums.

In this way, when the first to fourth rotation fulcrums A to D are arranged, the compression spring 9 has a force (elastic return force) for opening the first and second connecting portions 902 and 903. Has been granted. For this reason, the force F ₁ acting between the third pivot fulcrum C and the fourth pivot fulcrum D (that is, the force acting on the compression spring 9) faces the upper left side shown in FIG. Yes. The force F ₂ acting between the second pivot fulcrum B and the third pivot fulcrum C (that is, the force acting on the drive plate 7) is slightly directed to the lower left side. Here, when the angle between the force F ₁ and the force F ₂ is θ ₁ , the force F ₂ is obtained by the following (Equation 1).
F ₂ = F ₁ cos θ ₁ (Formula 1)

The force acting between the first pivot point A and the second pivot point B and F _d, the angle between the direction of the direction and the force F _d of the force F ₂ as a theta ₂ Then, the force F ₃ acting on the conductor plate 8 is obtained by the following (Equation 2). That is, when the angle θ ₂ is at least larger than 0 °, the force F ₃ is in a state of facing upward.
F ₃ = F ₂ sin θ ₂ (Formula 2)

Further, when the force acting on the third pivot point C and F _4, the force F ₄ is determined by the following equation (3). That is, when the angle θ ₁ is at least larger than 0 °, the force F ₄ is in a state of facing upward. At this time, if the angle between the direction of the force F _{5 and} the direction of the force F ₄ is θ3, the force F ₅ for moving the third rotation fulcrum C upward is as follows: It is obtained by equation 4).
F ₄ = F ₁ sin θ ₁ (Formula 3)
F ₅ = F ₄ cos θ ₃ (Formula 4)

Here, in the snap action mechanism 5, the force F ₁ is always placed on the upper side than the force F _2. For this reason, the angle θ ₁ between the force F ₁ and the force F ₂ is always larger than 0 °. When the angle θ ₁ is larger than 0 °, a force F ₅ that moves upward from (Expression 3) and (Expression 4) acts on the third rotation fulcrum C. As a result, the operation member 4 is always urged upward by the snap action mechanism 5.

  Further, in the initial state, the fifth rotation fulcrum E is disposed on the outer side (right side shown in FIG. 8) than the second rotation fulcrum B. Further, the second rotation fulcrum B is disposed below the fifth rotation fulcrum E. When the operation member 4 is pressed from the initial state and the drive plate 7 rotates about the fifth rotation fulcrum E as the rotation fulcrum E, the second rotation fulcrum B provided on the drive plate 7 is slightly lower side. It is configured to be movable.

  Hereinafter, the snap action operation of the snap action mechanism 5 included in the switch device 1 according to the present embodiment will be described with reference to FIGS. 9 to 13. In the snap action mechanism 5 included in the switch device 1 according to the present embodiment, the plurality of rotation fulcrums (first to fifth rotation fulcrums A to E) described above in accordance with the pressing operation on the operation member 4. Each component performs a snap action while rotating. In particular, when the operation member 4 is pushed beyond a certain position, the snap action mechanism 5 is reversed to switch between the fixed contact terminals 3 (between the common contact terminal 31 and the switching contact terminal 32) to a conductive state.

  When the operating member 4 is pressed into the housing 2 from the initial state shown in FIG. 8, the engagement piece 902 b of the compression spring 9 is pressed downward in the case 21 by the lower surface of the shaft portion 42. The position in contact with the engagement piece 902 b on the lower surface of the shaft portion 42 constitutes the point of action of the pressing force from the operation member 4. The compression spring 9 rotates counterclockwise on the left side end with the fourth rotation fulcrum D as a rotation fulcrum.

  As the compression spring 9 rotates, in the snap action mechanism 5, the drive plate 7 rotates counterclockwise on the left end side with the fifth rotation fulcrum E as a rotation fulcrum, as shown in FIG. It becomes. FIG. 9 shows the snap action mechanism 5 in a state immediately before reversal in the switch device 1 according to the present embodiment. In FIG. 9, the case 21 and the operation member 4 are omitted for convenience of explanation. The same applies to FIGS. 10 to 13 described below.

  When shifting to the state shown in FIG. 9, when the drive plate 7 rotates with the fifth rotation fulcrum E as the rotation fulcrum E, the second rotation fulcrum B provided on the drive plate 7 is slightly lower side. Move to. For this reason, the conductor plate 8 rotatably supported by the second rotation fulcrum B also moves slightly downward. As the conductor plate 8 moves, the movable contact 6 fixed to the lower surface thereof also moves slightly downward. For this reason, the clamping part of the plate-shaped part 222a by the clamping parts 604 and 605 provided in the movable contact parts 602 and 603 is slightly changed to the lower side. As described above, since the sandwiching portions of the sandwiching portions 604 and 605 of the movable contact portions 602 and 603 can be changed in accordance with the pressing operation on the operation member 4, even when the sandwiching portion 604 is fixed to the plate-like portion 222 a of the protruding piece 222. Since the holding portions 604 and 605 can be forcibly separated from the plate-like portion 222a using the pressing force on the operation member 4, the conduction state between the movable contact portions 602 and 603 and the switching contact portion 321 can be switched stably. It becomes possible.

As shown in FIG. 9, when the snap action mechanism 5 shifts to a state immediately before reversing, the first rotation fulcrum A connects the second rotation fulcrum B and the third rotation fulcrum C. It is arranged above the straight line. That is, the angle θ ₂ between the direction of the force F _{2 and} the direction of the force F _d becomes 0 ° or less, and the direction of the force F ₃ acting on the conductor plate 8 changes to a state facing downward. However, in the snap action mechanism 5, the sliding contact type movable contact 6 is fixed to the conductor plate 8, and the sandwiching portions 604 and 605 provided at the tips sandwich the plate-like portion 222 a of the protruding piece 222. doing. Force F _mu generated by the frictional resistance of the sandwiching portion 604 and 605 acts in the opposite direction of the force _{F 3.} In the snap action mechanism 5 shown in FIG. 9, the case where the magnitude of the force F _μ is equal to the magnitude of the force F ₃ is shown. If the magnitude of such a force F _mu is equivalent to the magnitude of the force F _3, or when the magnitude of the force F ₃ is less than the magnitude of the force F _mu is the snap action mechanism 5 is inverted There is no.

When the operating member 4 is slightly pressed into the housing 2 from the state shown in FIG. 9, the angle θ ₂ between the direction of the force F _{2 and} the direction of the force F _d further increases. Accordingly, when the magnitude of the force F ₃ acting on the conductor plate 8 exceeds the magnitude of the force F _μ generated by the frictional resistance of the sandwiching portions 604 and 605, the snap action mechanism 5 is reversed. That is, in the snap action mechanism 5, the right side end portion of the conductor plate 8 rotates at once in the clockwise direction with the first rotation fulcrum A as the rotation fulcrum, resulting in the state shown in FIG. FIG. 10 shows the snap action mechanism 5 in the state immediately after being reversed in the switch apparatus 1 according to the present embodiment. At this time, the protruding piece 703 a provided in the second connecting portion 703 of the driving member 7 is in a state of being separated from the ceiling surface 212 of the case 21.

  As shown in FIG. 10, when the conductor plate 8 is rotated, the movable contact 6 fixed to the conductor plate 8 is also rotated in the clockwise direction. As a result, in the movable contact 6, the sandwiching portions 604 and 605 slide from the plate-like portion 222 a of the protruding piece 222 and come into contact with the switching contact portion 321 of the switching contact terminal 32. As a result, the common contact terminal 31 and the switching contact terminal 32 are switched to the conductive state via the movable contact 6, and the switch device 1 is turned on. In this state where the snap action mechanism 5 is inverted, the lower surface of the conductor plate 8 is in contact with the protruding piece 222b provided at the upper end of the plate-like portion 222a, and the right side end portion is larger than that. The rotation is limited.

  As described above, in the switch device 1 according to the present embodiment, the movable contact 6 fixed to the conductor plate 8 is driven along with the reversing operation in the snap action mechanism 5. In this case, when the operation member 4 is pressed from the initial state, as described above, the drive plate 7 rotates with the fifth rotation fulcrum E as the rotation fulcrum, and the lower side of the switch device 1 ( It is pushed into the fixed base 22 side). Along with this, the holding portions 604 and 605 of the movable contact portions 602 and 603 that hold the plate-like portion 222a of the protruding piece 222 also move downward. That is, the sandwiching portions 604 and 605 are slightly moved before the reversing operation in the snap action mechanism 5. For this reason, compared with the case where the clamping parts 604 and 605 are not moving before the reversing operation in the snap action mechanism 5 (static friction state), the friction coefficient with the plate-like part 222a can be reduced. It is possible to realize the reversing operation in the snap action mechanism 5 while suppressing the influence of friction between the 604 and 605 and the plate-like portion 222a.

  When the operation member 4 is further pressed to the lowest position in the housing 2 from the state shown in FIG. 10, the compression spring 9 and the drive plate 7 have the fourth rotation fulcrum D and the second rotation fulcrum B, respectively. As shown in FIG. 11, the left side end turns as a turning fulcrum. FIG. 11 shows the snap action mechanism 5 in a state where the operation member 4 is pressed to the lowest position (full stroke state) in the switch device 1 according to the present embodiment. Also in FIG. 11, the snap action mechanism 5 is in an inverted state, and the switch device 1 is maintained in the ON state.

  In the compression spring 9 constituting the snap action mechanism 5, as described above, an elastic return force that tries to open the first and second connecting portions 902 and 903 is acting. For this reason, as shown in FIG. 11, when the pressing operation is released from the state in which the operating member 4 is pressed to the lowest position in the housing 2, the snap action mechanism 5 causes the elastic return of the compression spring 9. It tries to return to the initial state shown in FIG. Hereinafter, the operation of the snap action mechanism 5 when returning to the initial state will be described.

Even in a full-stroke state shown in FIG. 11, the angle θ1 between the force F ₁ and force F ₂ is greater than 0 °. Therefore, a force F ₅ that moves upward is applied to the third rotation fulcrum C. For this reason, when the pressing operation on the operation member 4 is released from the state shown in FIG. 11, the left end portion side of the compression spring 9 is moved in the fourth rotation by the elastic return force of the compression spring 9 in the case 21. It rotates in the clockwise direction using the moving fulcrum D as a fulcrum. As the compression spring 9 rotates, in the snap action mechanism 5, the drive plate 7 rotates the left side end side clockwise with the second rotation fulcrum B as the rotation fulcrum, as shown in FIG. It will be in the state shown. FIG. 12 shows the snap action mechanism 5 in a state immediately before reversing at the time of return in the switch device 1 according to the present embodiment.

As shown in FIG. 12, when the snap action mechanism 5 shifts to a state immediately before reversing at the time of return, the first rotation fulcrum A is the second rotation fulcrum B and the third rotation fulcrum C. It is arranged below the straight line connecting That is, the angle θ ₂ between the force F ₂ and the force F _d becomes larger than 0 °, and the direction of the force F ₃ acting on the conductor plate 8 changes to a state of facing upward. However, the snap action mechanism 5, the force F _mu generated by the frictional resistance of the clamping portions 604 and 605 of the movable contact 6, which acts in the opposite direction of the force F ₃ as described above. In the snap action mechanism 5 shown in FIG. 12, the case where the magnitude of the force F _μ is equal to the magnitude of the force F ₃ is shown. If the magnitude of such a force F _mu is equivalent to the magnitude of the force F _3, or when the magnitude of the force F ₃ is less than the magnitude of the force F _mu is the snap action mechanism 5 is inverted There is no.

When the operating member 4 is slightly pushed back upward from the state shown in FIG. 12, the angle θ ₂ between the direction of the force F _{2 and} the direction of the force F _d further increases. Accordingly, when the magnitude of the force F ₃ acting on the conductor plate 8 exceeds the magnitude of the force F _μ generated by the frictional resistance of the sandwiching portions 604 and 605, the snap action mechanism 5 is reversed. That is, in the snap action mechanism 5, the left side end portion of the conductor plate 8 rotates at once in the counterclockwise direction with the first rotation fulcrum A as the rotation fulcrum, resulting in the state shown in FIG. FIG. 13 shows the snap action mechanism 5 in the state immediately after being reversed in the switch apparatus 1 according to the present embodiment.

  As shown in FIG. 13, when the conductor plate 8 is rotated, the movable contact 6 fixed to the conductor plate 8 is also rotated in the counterclockwise direction. As a result, in the movable contact 6, the sandwiching portions 604 and 605 slide from the switching contact portion 321 and come into contact with the plate-like portion 222 a of the protruding piece 222. As a result, the common contact terminal 31 and the switching contact terminal 32 are switched to the non-conductive state, and the switch device 1 is turned off. Thereafter, in the snap action mechanism 5, the operation member 4 is further pushed back upward by the elastic return force of the compression spring 9 to return to the initial state shown in FIG. 8.

  As described above, in the switch device 1 according to the present embodiment, the drive plate 7 has the fifth rotation fulcrum E arranged outside the second rotation fulcrum B in response to the pressing operation on the operation member 4. Since the second rotation fulcrum B is moved by rotating as the rotation fulcrum, it is provided on the conductor plate 8 engaged with the drive plate 7 at the second rotation fulcrum B in accordance with the pressing operation on the operation member 4. The movable contact 6 can be moved. For this reason, even when the movable contact 6 is fixed to a part of the fixed base 22 (for example, a part of the plate-like portion 222a), the pressing force applied to the operation member 4 is directly transmitted to forcibly fix the fixed base 22. Therefore, the conductive state between the fixed contact (switching contact portion 321) and the movable contact 6 (movable contact portions 602, 603) can be stably switched.

  In the switch device 1 according to the present embodiment, the snap action mechanism 5 is a compression spring disposed on the opposite side of the second rotation fulcrum B and the fourth rotation fulcrum D across the common contact terminal 31. Nine engaging pieces 902b receive the pressing force of the operating member 4. Thereby, the position opposite to the second rotation fulcrum B constituting the rotation fulcrum of the conductor plate 8 with respect to the common contact terminal 31 and the fourth rotation fulcrum D constituting the rotation fulcrum of the compression spring 9. Since the pressing force from the operation member 4 can be received, the length of the point of the pressing force from the operation member 4 and the second rotation fulcrum B or the fourth rotation fulcrum D can be secured. It is possible to lengthen the stroke of the pressing operation on the operation member 4.

  In addition, this invention is not limited to the said embodiment, It can implement by changing suitably. In the above-described embodiment, the size, shape, and the like illustrated in the accompanying drawings are not limited thereto, 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.

  For example, in the snap action mechanism 5 according to the above-described embodiment, a configuration in which the pressing force associated with the pressing operation is received by the engagement piece 902b of the compression spring 9 through the lower surface of the shaft portion 42 of the operation member 4 will be described. Yes. However, the configuration for receiving the pressing force in the snap action mechanism 5 is not limited to the compression spring 9, and is configured by a part of the drive plate 7 disposed on the outer side (left side) of the common contact terminal 31. It may be. Even in the case of such changes, the same effects as in the above embodiment can be obtained. Furthermore, it is good also as a structure which receives the pressing force accompanying pressing operation in each of the compression spring 9 arrange | positioned on the outer side of the common contact terminal 31, and the drive plate 7. FIG.

  Moreover, in the said embodiment, although the movable contact 6 demonstrated the sliding contact type contact structure which slides on the surface of the switching contact terminal 32 (switching contact part 321), a contact structure is limited to this. Is not to be done. For example, the contact structure of the form which a movable contact contact | abuts with the switching contact part of a switching contact terminal may be sufficient. In this case, it is not necessary to consider the force due to the frictional resistance between the sandwiching portions 604 and 605 of the movable contact 6 and the plate-like portion 222a (or the switching contact portion 321).

1 Push-type switch device (switch device)
2 Housing 21 Case 211 Opening 212 Ceiling surface 213 Restriction piece 214 Guide groove 22 Fixed base 221 Projection surface 222 Projection piece 222a Plate-like part 222b Projection piece 222c Locking piece 3 Fixed contact terminal 31 Common contact terminal 311 311a 311b Common contact portion 312 Terminal portion 313 Recess 32 Switching contact terminal 321 Switching contact portion 322 Terminal portion 4 Operation member 41 Base portion 42 Shaft portion 43, 431 Side surface portion 432 Rib portion 5 Snap action mechanism 6 Movable contact 601 Base portion 602, 603 Movable contact portion 604, 605 Nipping part 7 Drive plate 701 Side wall part 701a Base part 701b Main body part 702 First connection part 702a Recess 703 Second connection part 703a Projection piece 703b Recess 704 Opening part 8 Conductive plate 801 Base part 802 Arm part 802a 802 803 Slit part 9 Compression spring 901 Long side part 902 1st connection part 902a Constriction part 902b Engagement piece 903 2nd connection part 904, 904a, 904b Shoulder part 905 Opening part 906 Concave part A 1st rotation fulcrum B 2nd Rotation fulcrum C Third rotation fulcrum D Fourth rotation fulcrum E Fifth rotation fulcrum

Claims (7)

A housing having a storage portion; an operation member for receiving a pressing operation; a fixed contact terminal having a common contact terminal and a switching contact terminal provided in the storage portion; a movable contact contacting and separating from the switching contact terminal; A pressing switch device comprising a snap action mechanism that drives the movable contact when a member is pressed to a predetermined position;
The common contact terminal is erected in the storage portion, and the snap action mechanism is supported on one end of the common contact terminal by a first rotation fulcrum and provided with the movable contact. A driving member whose one end is engaged with the second rotation fulcrum on the other end of the conductor member, and a third rotation located on the first rotation fulcrum on the other end of the drive member An urging member that is locked to a fixed base integrated with the housing at a fourth rotation fulcrum that is locked at one end by a fulcrum and that has the other end located at the second rotation fulcrum; Have
In the snap action mechanism, a part of the driving member or the urging member disposed on the third rotation fulcrum side is pressed in response to a pressing operation on the operating member, and the driving member is The second rotation fulcrum is moved with the fifth rotation fulcrum arranged on the opposite side of the first rotation fulcrum as the rotation fulcrum. Push-type switch device.   The snap action mechanism is a part of the driving member or the biasing member disposed on the opposite side of the second rotation fulcrum and the fourth rotation fulcrum across the common contact terminal. 2. The pressing switch device according to claim 1, wherein the pressing switch device receives a pressing force of.   The press-type switch device according to claim 2, wherein the snap action mechanism has the fourth rotation fulcrum disposed on the opposite side of the first rotation fulcrum with the switching contact terminal interposed therebetween.   The said snap action mechanism formed the said 1st rotation fulcrum in a part of end surface of the said common contact terminal by the side of the said switching contact terminal, The Claim 1 characterized by the above-mentioned. Push-type switch device.   The drive member intersects the moving direction of the operating member from the one end side of the driving member along a direction parallel to the moving direction of the operating member and from the base portion to the other end side of the driving member. A side wall formed of a main body extending in the direction and connected to the other end of the drive member, a recess is formed on the common contact terminal side of the base, and the other end of the conductor member is formed in the recess The press-type switch device according to any one of claims 1 to 4, wherein the second rotation fulcrum is formed by engaging each other.   The urging member is configured by a compression spring made of a leaf spring, and is provided at a pair of long side portions extending in a direction intersecting a moving direction of the operation member, and at an end portion of the pair of long side portions. A pair of connecting portions is provided, and a part of the long side portion in the vicinity of one connecting portion is bent toward the operation member side and locked to the fixed base. Item 6. The press-type switch device according to any one of Items 5.   The press-type switch device according to any one of claims 1 to 6, wherein the movable contact is configured by a sliding contact that slides on a surface of the switching contact terminal.

Images