JP5975387B2 - Push button switch - Google Patents

Description

  The present invention relates to a push button switch used for a piano handle type switch, for example.

  FIG. 11 shows a configuration of an open / close function part of a conventional pushbutton switch described in Patent Document 1. 11A shows a state in which the push button switch 50 is turned on, FIG. 11B shows a state in the middle of turning off the push button switch 50, and FIG. 11C shows a state at the moment when the push button switch 50 is turned off.

  The conventional push button switch 50 is intended to obtain almost the same operation feeling regardless of which part of the push button handle 51 is pressed. The push button handle 51 has a substantially cylindrical shape with the top 51a closed, and a claw 51c projecting outward in the longitudinal direction (X direction) is formed at the lower end of the cylindrical portion 51b on the opening side. Yes. When the claw 51c is press-fitted into the fitting hole 53a formed in the cover (housing) 53, the cylindrical portion 51b of the push button handle 51 can slide through the fitting hole 53a and cannot be detached from the cover 53. Is engaged. A coil spring 52 is provided inside the cylindrical portion 51 b of the push button handle 51, and the push button handle 51 moves outward in the height direction (Z direction) from the cover 53 by the elastic force (restoring force) of the coil spring 52. It is biased to protrude.

  A protrusion 51d is formed on the inner side of the top 51a of the push button handle 51 so as to protrude inward, and is engaged with a slide cam 54 that can slide in the longitudinal direction (X direction). . A reversing handle 55 for rotating the movable contact 56 with respect to the fixed contact 57 is provided at a position facing the slide cam 54 inside the cover 53 of the push button switch 50. In the state shown in FIG. 11A, the reversing handle 55 is tilted to the right in the drawing, whereby the movable contact 56 comes into contact with the fixed contact 57, and the push button switch 50 is turned on. In this state, since the push button handle 51 is not yet pushed in, the distance between the slide cam 54 and the engaging projections 55a and 55b formed at the left and right ends in the longitudinal direction (X direction) of the upper end portion of the reversing handle 55 is increased. Yes.

  As shown in FIG. 11B, when the push button handle 51 is pushed against the cover 53 against the biasing force of the coil spring 52, the slide cam 54 also moves together with the push button handle 51, and the end surface of the slide cam 54 is It contacts the engaging protrusion 55a on the left side of the reversing handle 55 located at the upper position in the height direction (Z direction). Tapered surfaces are formed at both ends in the longitudinal direction (X direction) of the end surface of the slide cam 54, and the tapered surface moves on the engaging projection 55a as the slide cam 54 moves in the height direction (Z direction). The sliding cam 54 is displaced to the left in the longitudinal direction (X direction). Therefore, the rotation operation of the reversing handle 55 is not hindered. In parallel with the movement, the reversing handle 55 starts to rotate counterclockwise about the support shaft 55c, and the left engaging protrusion 55a descends in the height direction (Z direction), and the right engaging protrusion 55b. Rises.

  As shown in FIG. 11 (c), when the reversing handle 55 rotates counterclockwise by a predetermined angle and stops rotating by contacting a stopper (not shown), the movable contact 56 is pulled away from the fixed contact 57. Thereby, the push button switch 50 is turned off. When the force for pushing the push button handle 51 is released, the push button handle 51 is returned to the position shown in FIG. 11A by the biasing force of the coil spring 52, and at the same time, the slide cam 54 is also moved in the longitudinal direction (X Direction). When the push button switch 50 is turned on, the push button handle 51 is pushed into the cover 53 until it stops, and the pushing force is released, as described above. The slide cam 54 and the reversing handle 55 perform a movement in which the left and right in FIGS. 11A to 11C are reversed, whereby the movable contact 56 is brought into contact with the fixed contact 57.

JP-A-6-52753

  FIG. 12 shows a change in load when the push button handle 51 is pushed into the cover 53 side. When the push button handle 51 starts to be pushed into the cover 53 side, the coil spring 52 is compressed, and the load gradually increases. When the slide cam 54 comes into contact with the engaging protrusion 55a or 55b of the reversing handle 55 at the point P1, the load increases rapidly and nonlinearly in order to rotate the reversing handle 55. The reversing handle 55 is provided with a spring (not shown) for maintaining the reversing handle 55 in the state shown in FIG. 11A or 11 C. As the reversing handle 55 rotates, This is because the amount of elastic deformation of the spring increases. If, for example, the reversing handle 55 is switched from the state shown in FIG. 11A to the state shown in FIG. 11C at the point P2, the load due to the spring that urges the reversing handle 55 disappears, and the load due to the coil spring 52 again. To increase. At the point P3, the push button handle 51 comes into contact with the stopper 58 provided on the cover 53 or the like and is not pushed further.

  Thus, according to the conventional push button switch 50, when the slide cam 54 comes into contact with the engagement protrusion 55a or 55b of the reversing handle 55, the load suddenly increases, the operation feeling is not smooth, and the operation feeling is improved. Is required. The present invention has been made to solve the above-described problems of the conventional example, and an object thereof is to provide a pushbutton switch having a smooth operation feeling.

In order to achieve the above object, a pushbutton switch according to the present invention provides:
A housing,
A fixed contact provided inside the housing and a movable contact capable of taking a contact state and a non-contact state with respect to the fixed contact;
Provided inside the casing and rotated within a predetermined angular range around a support shaft parallel to the base plate at the bottom of the casing, and the movable contact contacts the fixed contact according to the rotation. A reversing handle for switching between a state and a non-contact state,
A push button handle that is held in the casing so as to be slidable in a direction perpendicular to the base plate in a direction perpendicular to the base plate and in a direction parallel to the base plate;
A spring provided between the push button handle and the housing and biasing the push button handle to protrude outward from the housing in a direction perpendicular to the base plate;
Provided between the push button handle and the reversing handle in a direction perpendicular to the base plate, moves with the movement of the push button handle, is parallel to the base plate , and is orthogonal to the support shaft. A slide cam displaceable in the direction;
An elastic deformation member is provided between the push button handle and the slide cam or between the slide cam and the reversing handle in a direction perpendicular to the base plate.

  The elastic deformation member is preferably a plate-like body formed of a material having a smaller elastic coefficient than any material of the push button switch, the slide cam, and the reversing handle.

  Further, the elastic deformation member is provided in a portion of the reversing handle that can come into contact with the slide cam, and is made of a material having a smaller elastic coefficient than a material of the reversing handle, and a portion that can come into contact with the slide cam; It is preferable that they are formed in substantially the same shape.

Alternatively, the elastic deformation member is an elastic deformation layer formed of a material having a smaller elastic coefficient than a material of the reversing handle provided in a portion of the reversing handle that can come into contact with the slide cam. preferable.

  Or it is preferable that the said elastic deformation member is a leaf | plate spring formed with the metal material or resin material which has a spring property.

  Alternatively, the elastic deformation member is preferably a coil spring formed of a metal material having spring properties.

  Or it is preferable that the said elastic deformation member is a leaf | plate spring formed with the resin material which has a spring property, and was integrally molded by the said slide cam.

  The leaf spring or the coil spring preferably has a non-linear spring constant.

  When the elastic deformation member is provided between the push button handle and the slide cam, when the push button handle is pushed inward of the housing, the elastic deformation member becomes the reverse handle before the slide cam contacts the reverse handle. Contact. When the push button handle is further pushed inward of the housing, the elastic deformation member starts elastic deformation, and when the elastic deformation member can no longer elastically deform, the reversing handle starts to rotate. On the other hand, when an elastic deformation member is provided between the slide cam and the reverse handle, when the push button handle is pushed inward of the housing, the elastic deformation member starts elastic deformation after the slide cam contacts the reverse handle. To do. When the elastic deformation member can no longer be elastically deformed, the reversing handle starts to rotate. Therefore, the change in load when the pushbutton handle is pushed into the housing side becomes gentle as shown in FIG. 2 or FIG. 9 compared with the conventional example shown in FIG. 12, and the operation feeling is improved.

Sectional drawing which shows the 1st structural example of the pushbutton switch which concerns on one Embodiment of this invention. The figure which shows the change of the load at the time of pushing the pushbutton handle in the said 1st structural example into the housing | casing side. Sectional drawing which shows the 2nd structural example of a pushbutton switch. Sectional drawing which shows the 3rd structural example of a pushbutton switch. Sectional drawing which shows the 4th structural example of a pushbutton switch. Sectional drawing which shows the 5th structural example of a pushbutton switch. Sectional drawing which shows the 6th structural example of a pushbutton switch. Sectional drawing which shows the 7th structural example of a pushbutton switch. The figure which shows the change of the load at the time of pushing the pushbutton handle in the pushbutton switch in the said 7th structural example into the housing | casing side. Sectional drawing which shows the 8th structural example of a pushbutton switch. It is a figure which shows the structure of the opening / closing function part of the conventional pushbutton switch, (a) is the state in which the pushbutton switch is on, (b) is the state in the middle of turning off the pushbutton switch, (c) is the pushbutton switch off Shows the state of the moment. The figure which shows the change of the load at the time of pushing the pushbutton handle in the conventional pushbutton switch into the cover side.

  A pushbutton switch according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a first configuration example of the pushbutton switch 1 according to the present embodiment. The push button switch 1 includes an opening / closing function unit 10 having an opening / closing function as a switch, and a distal end portion (hereinafter referred to as “insulation covering”) of a vinyl insulated wire 60 for indoor wiring that has not been insulated. It is comprised by the quick connection terminal part 20 to which a "electric wire 60" is simply connected. Here, the direction parallel to the base plate 21b described later and having the maximum dimension of the body 21 is the longitudinal direction (X direction), the direction orthogonal to the base plate 21b is the height direction (Z direction), and the direction perpendicular to the paper surface. Is defined as the width direction (Y direction).

  The quick connection terminal portion 20 has a body 21 formed of a thermosetting resin for holding the two terminal plates 22 and 23 formed of a highly conductive metal such as copper in a predetermined positional relationship. Yes. In the base plate 21b at the bottom of the body 21, wire insertion holes 24 for inserting the wires 60 are provided, for example, at two locations corresponding to the terminal plates 22 and 23, for a total of four locations. The terminal plates 22 and 23 are disposed on both sides of the storage space 21a in the longitudinal direction (X direction) of the body 21, and the wire connection surfaces 22a and 23a are substantially orthogonal to the base plate 21b. It is held in place.

  Lock springs 25 are respectively provided below the terminal plates 22 and 23 in the height direction (Z direction) and inside the wire insertion holes 24 in the longitudinal direction (X direction). When the electric wire 60 is inserted into the electric wire insertion hole 24 from the bottom of the body 21, the electric wire 60 is pressed against the electric wire connection surfaces 22a and 23a of the terminal plates 22 and 23 by the lock spring 25, respectively. An unlock button 26 for unlocking the lock spring 25 is provided outside the lock spring 25 in the longitudinal direction (X direction) of the body 21. In order to pull out the electric wire 60 from the electric wire insertion hole 24, the tip of a tool such as a screwdriver is inserted from the tool insertion hole 27 formed in the base plate 21b of the body 21, and the unlocking button 60 is moved in the longitudinal direction (X direction) of the body 21. )

  The opening / closing function unit 10 is fitted in a cover 11 fitted to the body 21 and a fitting hole 11a formed in the cover 11 and is slidable with respect to the cover 11 in the height direction (Z direction). And a coil spring 13 that urges the push button handle 12 to protrude outward from the cover 11 in the height direction (Z direction). The body 21 and the cover 11 constitute a casing of the push button switch 1. A fixed contact 17 is fixed to the end face 22 b of the terminal board 22. A groove (V groove) 21c having a substantially V-shaped cross section perpendicular to the base plate 21b and parallel to the longitudinal direction (X direction) is formed at the bottom of the storage space 21a of the body 21. It is held so as to take either the state indicated by the solid line or the state indicated by the alternate long and short dash line. Above the V-groove 21, a predetermined angular range is defined within the plane defined by the longitudinal direction (X direction) and the height direction (Z direction), with a support shaft 15c parallel to the width direction (Y direction) as the center. A reversing handle 15 that can be tilted (rotated) is provided. The upper end 18 a of the movable plate 18 in the height direction (Z direction) is engaged with the lower end 15 d of the reversing handle 15. The reversing handle 15 is also held by a stopper and a spring (not shown) so as to take either a state indicated by a solid line or a state indicated by a one-dot chain line in the drawing. The lower end 18b of the movable plate 18 is electrically connected to a portion 23b of the other terminal plate 23 parallel to the base plate 21b at the bottom of the V groove 21c. Furthermore, a movable contact 16 is provided in a portion of the movable plate 18 that faces the fixed contact 17. Accordingly, the current flows in the order of the electric wire 60, the terminal plate 22, the fixed contact 17, the movable contact 16, the movable plate 18, the terminal plate 23, and other electric wires (not shown).

  The push button handle 12 is, for example, a cylindrical body whose top 12a is closed, and a claw 12c that protrudes outward in the longitudinal direction (X direction) is formed at the lower end portion on the opening side of the cylindrical portion 12b. ing. The cross-sectional shape of the push button handle 12 in plan view may be a circle as shown in the conventional example, a rectangle such as a square, or other shapes. When the claw 12c is press-fitted into the fitting hole 11a formed in the cover 11, the cylindrical portion 12b of the push button handle 12 is slidable through the fitting hole 11a and is engaged with the cover 11 so as not to fall off. The A coil spring 13 having a winding diameter substantially equal to the inner dimension in the width direction (Y direction) is provided on the inner side of the cylindrical portion 12b of the push button handle 12, for example. Since the natural length of the coil spring 13 is larger than the height of the space formed between the cylindrical portion 12b of the push button handle 12 and the cover 11, the coil spring 13 is always compressed. Therefore, the push button handle 12 is biased by the elastic force (restoring force) of the coil spring 13 so as to protrude outward from the cover 11 in the height direction (Z direction).

  A slide cam 14 slidable in the longitudinal direction (X direction) is provided on the inner side of the top portion 12a of the push button handle 12 and in the center thereof. The slide cam 14 is formed of a resin having elasticity and durability, and includes a substantially rectangular frame and two beam-like spring portions formed in a space portion of the frame. A protrusion 12d formed so as to protrude from the top 12a of the push button handle 12 toward the inside of the tubular portion 12b is engaged between the two beam-like spring portions. Accordingly, the slide cam 14 is integrally held by the push button handle 12, and the slide cam 14 can be displaced in the longitudinal direction (X direction).

  In the first configuration example, the lower surface of the slide cam 14, that is, the surface facing the reversing handle 15, is formed of a material having a larger elastic coefficient than any of the materials of the push button handle 12, the slide cam 14, and the reversing handle 15. A plate-like elastic deformation member 30 is provided. The slide cam 14 is made of, for example, polyacetal, and the push button handle 12 and the reversing handle 15 are made of, for example, thermosetting resin having heat resistance such as urea resin. As a material of the elastic deformation member 30, a material having heat resistance such as fluorine rubber or silicone rubber is used. In particular, a material exhibiting a so-called “spring property” having no hysteresis loss with respect to resilience after elastic deformation is preferable.

  FIG. 2 shows a change in load when the push button handle 12 is pushed into the cover 11 side. When the push button handle 12 starts to be pushed toward the cover 11, the coil spring 13 is compressed and the load gradually increases. At the point P1, the elastic deformation member 30 provided on the lower surface of the slide cam 14 comes into contact with the engagement protrusion 15a or 15b of the reversing handle 15, and the elastic deformation member 30 starts to be elastically deformed. When the push button handle 12 is further pushed into the cover 11 side, the elastically deformable member 30 can no longer be deformed, and the reversing handle 15 starts rotating around the support shaft 15c (that is, the reversing operation is started). As described above, the reversing handle 15 is provided with a spring (not shown) for maintaining the reversing handle 15 in the state indicated by the solid line or the alternate long and short dash line. The amount of elastic deformation of the spring increases, and the load increases approximately linearly. If the reversing handle 15 is switched from the state indicated by the solid line to the state indicated by the alternate long and short dash line at the point P2, for example, the load applied by the spring urging the reversing handle 15 disappears, and the load applied by the coil spring 13 increases again. At the point P3, the push button handle 12 comes into contact with a stopper (not shown) provided on the cover 11 or the like and is not pushed further.

  FIG. 3 shows a second configuration example of the pushbutton switch 1 according to the present embodiment. In the following configuration examples, the configuration of the quick connection terminal portion 20 is the same as that of the first configuration example shown in FIG. In the second configuration example, the plate-like elastic deformation member 30 is provided on the upper surface of the slide cam 14, that is, the surface on the side facing the top portion 12 a of the push button handle 12. The material of the elastic deformation member 30 may be formed of a material having a larger elastic coefficient than any of the materials of the push button handle 12, the slide cam 14, and the reversing handle 15 as in the case of the first configuration example (hereinafter referred to as the first configuration example). The same applies to the third configuration example and the fourth configuration example). The elastic deformation member 30 may be attached to the lower surface of the slide cam 14 with an adhesive or the like, or the slide cam 14 and the elastic deformation member 30 are integrally formed using different materials (so-called two-color molding or insert molding). May be.

  In the second configuration example, the load change when the push button handle 12 is pushed into the cover 11 is the same as that shown in FIG. When the push button handle 12 is pushed into the cover 11 side, the lower surface of the slide cam 14 comes into contact with the engaging protrusion 15a or 15b of the reverse handle 15 at the point P1, and the elastic deformation member 30 is sandwiched between the slide cam 14 and the push button handle 12, Elastic deformation starts. When the push button handle 12 is further pushed into the cover 11 side, the elastic deformation member 30 can no longer be deformed, and the reversing handle 15 starts to rotate around the support shaft 15c. Subsequent operations are the same as those in the first configuration example.

  FIG. 4 shows a third configuration example of the pushbutton switch 1 according to the present embodiment. In the third configuration example, a plate-like elastic deformation member 30 is provided on the inner surface of the top portion 12 a of the push button handle 12. The elastic deformation member 30 formed separately from the push button handle 12 may be affixed to the inner surface of the top portion 12a, or the push button handle 12 and the elastic deformation member 30 may be integrally formed using different materials.

  FIG. 5 shows a fourth configuration example of the pushbutton switch 1 according to the present embodiment. In the fourth configuration example, the elastic deformation member 30 is provided on the top of the reversing handle 15 in the height direction (Z direction). The elastic deformation member 30 may be affixed to the top of the reversing handle 15 that is molded in the same shape as the top of the reversing handle 15, or fluorine rubber, silicone rubber, or the like may be applied to the top of the reversing handle 15. The elastically deformable layer may be formed by coating.

  FIG. 6 shows a fifth configuration example of the pushbutton switch 1 according to the present embodiment. In the fifth configuration example, the elastic deformation member 30 is provided with a spring for urging the slide cam 14 toward the reverse handle 15 on the inner surface of the top portion 12a of the push button handle 12 or the upper surface of the slide cam 14. The material and shape of the spring are not particularly limited. For example, a leaf spring or a coil spring using a spring material that is less likely to cause metal fatigue such as phosphor bronze or stainless steel may be used. Alternatively, a leaf spring using a resin having excellent durability such as polyacetal may be used. In the latter case, the elastically deformable member 30 and the slide cam 14 can be integrally formed.

  FIG. 7 shows a sixth configuration example of the pushbutton switch 1 according to the present embodiment. In the sixth configuration example, the elastic deformation member 30 is provided with a spring that pushes back the slide cam 14 toward the push button handle 12 at the top of the reversing handle 15 in the height direction (Z direction). The material and shape of the spring are not particularly limited. For example, a leaf spring or a coil spring using a spring material that is less likely to cause metal fatigue such as phosphor bronze or stainless steel may be used. Alternatively, a leaf spring using a resin having excellent durability such as polyacetal may be used.

  FIG. 8 shows a seventh configuration example of the pushbutton switch 1 according to the present embodiment. In the seventh configuration example, a non-linear spring that urges the slide cam 14 toward the reverse handle 15 is provided on the inner surface of the top portion 12 a of the push button handle 12 or the upper surface of the slide cam 14 as the elastic deformation member 30. As a non-linear spring, for example, the free end of a leaf spring is folded back to the top 12a side of the push button handle 12. After the slide cam 14 comes into contact with the engaging protrusion 15a or 15b of the reversing handle 15, the non-linear spring is elastically deformed in the same manner as a normal leaf spring, but when the folded free end comes into contact with the top 12a of the push button handle 12. The spring constant changes. FIG. 9 shows a change in load when the push button handle 12 is pushed into the cover 11 in this case. Compared to the first to sixth configuration examples shown in FIG. 2, the load when the push button handle 12 is pushed into the cover 11 changes non-linearly due to the change in the spring constant of the elastic deformation member 30.

  FIG. 10 shows an eighth configuration example of the push button switch 1 according to the present embodiment. In the eighth configuration example, the elastic deformation member 30 is a conical spring having a non-linear spring constant for biasing the slide cam 14 toward the reversing handle 15 between the inner surface of the top portion 12a of the push button handle 12 and the upper surface of the slide cam 14. Is provided. Thus, even if a conical spring is used, a non-linear load change as shown in FIG. 9 can be obtained.

  As described above, according to the present invention, between the push button handle 12 and the slide cam 14 in the direction perpendicular to the base plate 21b of the body 21 constituting the push button switch 1 (height direction: Z direction). Alternatively, since the elastic deformation member 30 is provided between the slide cam 14 and the reverse handle 15, when the push button handle 12 is pushed inward with respect to the housing (body 21 and cover 11), the reverse handle 15 performs the reverse operation. The elastic deformation member 30 is elastically deformed first before performing. Therefore, the change in load when the push button handle is pushed into the housing side becomes gentle as shown in FIG. 2 or FIG. 9 compared with the conventional example shown in FIG. 12, and the operation feeling is improved.

DESCRIPTION OF SYMBOLS 1 Pushbutton switch 10 Opening / closing function part 11 Cover (casing)
12 Push button handle 13 Coil spring 14 Slide cam 15 Reversing handle 15a, 15b Engagement projection 15c Support shaft 15d Lower end 16 Movable contact 17 Fixed contact 18 Movable plate 20 Fast connection terminal portion 21 Body (housing)
22, 23 Terminal board 30 Elastic deformation member

Claims (8)

A housing,
A fixed contact provided inside the housing and a movable contact capable of taking a contact state and a non-contact state with respect to the fixed contact;
Provided inside the casing and rotated within a predetermined angular range around a support shaft parallel to the base plate at the bottom of the casing, and the movable contact contacts the fixed contact according to the rotation. A reversing handle for switching between a state and a non-contact state,
A push button handle that is held in the casing so as to be slidable in a direction perpendicular to the base plate in a direction perpendicular to the base plate and in a direction parallel to the base plate;
A spring provided between the push button handle and the housing and biasing the push button handle to protrude outward from the housing in a direction perpendicular to the base plate;
Provided between the push button handle and the reversing handle in a direction perpendicular to the base plate, moves with the movement of the push button handle, is parallel to the base plate , and is orthogonal to the support shaft. A slide cam displaceable in the direction;
A pushbutton switch comprising an elastically deformable member provided between the pushbutton handle and the slide cam or between the slide cam and the reverse handle in a direction perpendicular to the base plate.   2. The push button according to claim 1, wherein the elastic deformation member is a plate-like body formed of a material having a smaller elastic coefficient than any of the materials of the push button handle, the slide cam, and the reversing handle. switch.   The elastic deformation member is provided in a portion of the reversing handle that can come into contact with the slide cam, and is made of a material having an elastic coefficient smaller than that of the material of the reversing handle and is substantially the same as the portion that can come into contact with the slide cam. The pushbutton switch according to claim 1, wherein the pushbutton switch is formed in a shape. The elastic deformation member is an elastic deformation layer formed of a material having a smaller elastic coefficient than a material of the reversing handle provided in a portion of the reversing handle that can come into contact with the slide cam. The push button switch according to claim 1.   The pushbutton switch according to claim 1, wherein the elastically deformable member is a leaf spring formed of a metal material or a resin material having a spring property.   The pushbutton switch according to claim 1, wherein the elastically deformable member is a coil spring formed of a metal material having a spring property.   2. The push button switch according to claim 1, wherein the elastically deformable member is a leaf spring formed of a resin material having a spring property and integrally formed with the slide cam.   The pushbutton switch according to any one of claims 5 to 7, wherein the leaf spring or the coil spring has a non-linear spring constant.

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