JP2004303716A - Push button switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a push button switch, achieving excellent performance stability and easier operation. <P>SOLUTION: The push button switch comprises a housing, a fixed contact provided on the inner bottom part of the housing, a moving contact mounted on the housing, an operation section, and a cover. An elastic strip projecting downwardly from the cover, for engaging to the operation section is provided. A projecting part is provided from the moving contact, which is projecting downwardly and is attached to/detached from the the fixed contact. In operation, if the operation section is pressed, it is moved downwardly by the pressure from the elastic strip of the cover body, causing the moving contact to deform to lower the projecting part of the moving contact to electrically connect to the fixed contact. If the pressure on the operation section is released, the moving contact is detached from the fixed contact by elastic restoring force to release the electric connection. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a push button switch, and more particularly, to a push button switch used for an electronic device.

  As shown in Patent Document 1, a conventional push button switch includes a housing, a fixed contact provided on an inner bottom portion of the housing, a movable contact disposed on the fixed contact, an operation member, and a lid. Wherein the lid has an inclined piece having elasticity, and the operating member projects outward from a side portion of the housing and an operating portion interposed between the inclined piece having elasticity and the movable contact. It is constituted integrally with the pressing portion. When used, the operating portion presses the pressing portion of the operating member, and the pressing force causes the operating portion to slide on the inclined piece to press the movable contact, and the movable contact is deformed and connected to the lower fixed contact. When the pressed state is released, the movable contact is separated from the fixed contact by a resilient force, and is turned off.

However, in such a conventional push button switch, since the pinch between the movable contact and the fixed contact is large, if the movable contact is not significantly elastically deformed when pressed, it is not connected to the fixed contact. In addition, there is a high possibility that the connection of the push button switch becomes defective due to insufficient pressing force and loss of elasticity of the movable contact. In addition, during the switching operation, the movable contact must be greatly elastically deformed, so that the reaction time is prolonged, so that the operation of the push button switch cannot be realized with an excessively long reaction time of the electronic device.
Utility model registration No. 2,572,590

  An object of the present invention is to provide a push button switch that can achieve stable performance and can be operated more easily.

  The push button switch of the present invention includes a housing, a fixed contact provided on an inner bottom portion of the housing, a movable contact sequentially mounted on the housing, an actuating element, and a lid. The movable piece is provided so as to protrude downward, and a protruding portion that comes into contact with or separates from the fixed contact from the movable contact protrudes downward. In use, when the actuating element is pressed, the actuating element is moved downward by the elastic pressure from the elastic piece of the lid, deforming the movable contact. Connection. When the pressing force on the actuation is removed, the movable contact is separated from the fixed contact by the elastic recovery force, and the electrical connection is released. This completes the entire switching process.

  Compared with the prior art, the present invention has the following advantages. Since the protrusion protruding below the movable contact is provided, even if the movable contact slightly deforms, a stable electrical connection with the fixed contact can be realized, thereby shortening the operation time of the push button switch, The operation becomes very simple.

  Referring to FIGS. 1 and 2, a push button switch 1 according to a first embodiment of the present invention includes a housing 10, a fixed contact 20 provided on an inner bottom portion of the housing 10, and a movable contact 30 sequentially attached to the housing 10. , An operation matter 40 and a lid 50.

  The housing 10 is provided in the shape of a box having an opening, and has a bottom surface 11, a front wall 12 extending upward from four side edges of the bottom surface 11, a rear wall 13, and a pair of opposed side walls 14. And From both ends of the bottom surface 11, a higher first step 15 and a lower second step 16 are installed in the form of a staircase, and a portion of each of the front wall 12 and the rear wall 13 close to the side wall 14, Both first recesses 17 are opened symmetrically, and second recesses 18 are opened symmetrically on both side walls 14. The front wall 12 and the rear wall 13 have cutouts (no symbols).

  A fixed contact 20 is provided on the inner bottom surface 11 of the housing 10 and includes a contact portion 21 protruding from the inner bottom surface 11 of the housing 10 and a soldering portion 22. The soldering portions 22 project from both lateral sides of the housing 10. , For connecting a push button switch to a circuit board (not shown) for an electronic device.

  The movable contact 30 has a top surface 31 and a side surface 32 extending downward at a fixed angle from the edge of the top surface 31. A plurality of protrusions 33 are provided so as to project downward from the top surface 31. In this embodiment, four protrusions 33 are provided, but the object of the present invention can be achieved even if one or more protrusions are provided depending on the case.

  The actuation case 40 is provided with a movable portion 41 and a pressing portion 42 protruding outside the housing 10. The movable portion 41 includes a guide portion 43 and an operating portion 45 extending from the edge of the hole on the pressing portion 42 side to the center of the hole 44, and the tip of the operating portion 45 is installed at an angle. Have been.

  The lid 50 has a main body 51, a support leg 52 extending downward from both long side edges of the main body 51, and a lower support extending from both short side edges of the main body 51. Including the support piece 53, the central portion of the main body 51 falls into a V-shaped tank, and a V-shaped elastic piece 54 is provided.

  When assembling, both ends of the above-mentioned movable contact 30 in the horizontal direction are hung on the second step 16 on both ends of the bottom surface 11 of the housing 10, and the top surface 31 and the contact portion 21 of the fixed contact 20 are brought into a state before connection. keeping. At the same time, the both ends of the movable part 41 of the actuation member 40 in the horizontal direction are engaged with the first step 15 at both ends of the bottom surface 11 of the housing 10. The lid 50 is fixed on the housing 10 by fitting the support leg 52 to the first recess 17 of the housing 10 and fitting the support piece 53 to the second recess 18 of the housing 10. At the same time, it holds the movable contact 30 and the actuation member 40 placed between the lid 50 and the housing 10. The operation part 41 of the operation case 40 is installed between the V-shaped elastic piece 54 and the movable contact 30.

  In use, when the pressing portion 42 of the operation case 40 is pressed, the operation portion 45 of the operation case 40 comes into contact with the V-shaped elastic piece 54 of the lid 50 while moving forward. The operating portion 45 presses the movable contact 30 by the operation of the V-shaped elastic piece 54 to elastically deform the movable contact 30, and electrically connects each protrusion 33 of the top surface 31 of the movable contact 30 to the corresponding fixed contact 20. Move down to connect to. When the pressed state of the actuation item 40 is released, the movable contact 30 is separated from the fixed contact 20 by the elastic recovery force, whereby the electrical connection is released and the switch-off operation is completed.

  3 and 4 show a second embodiment of the present invention. The structure of the push-button switch of the second embodiment is almost the same as that of the first embodiment, but differs only in the movable contact 30 '. The opening at the top of the movable contact 30 'of this embodiment is provided in a shape resembling a circle, and four convex pieces 33' are formed to extend downward from the edge of the opening (no symbol). The structure of the other elements is the same as in the first embodiment. Although the push-button switch of the second embodiment is provided with four convex pieces 33 ', the effect of the present invention can be achieved by providing one or more convex pieces 33' in some cases. In use, when the pressing portion 42 'of the operation item 40' is pressed, the operation portion 45 'of the operation item 40' moves forward, and becomes in a state of pressing the V-shaped elastic piece 54 'of the lid 50'. The operating portion 45 'comes into contact with the movable contact 30' by the pressing force of the V-shaped elastic piece 54 ', thereby deforming the movable contact 30', and moving the convex piece 33 'of the movable contact 30' downward. Is electrically connected to the fixed contact 20 ′. When the pressed state of the actuation case 40 'is released, the movable contact 30' is separated from the fixed contact 20 'by the elastic recovery force, and the electrical connection is released. The whole process of switch operation is completed. The assembling method used in the present embodiment is almost the same as that of the first embodiment, and thus the description is omitted.

  In general, the structure and function of the present invention, including its many features and advantages, are all set forth in the foregoing description. All of the above description, such as modification or change of details that can be made based on the present invention, belongs to the scope of the present invention.

FIG. 2 is an exploded perspective view of the push button switch according to the first embodiment of the present invention. FIG. 2 is a sectional view showing an assembled state of the push button switch according to the first embodiment of the present invention. It is a perspective view showing a movable contact of a 2nd example of the present invention. FIG. 7 is a sectional view showing an assembled state of a push button switch according to a second embodiment of the present invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Push button switch 10 Housing 11 Bottom surface 12 Front wall 13 Back wall 14 Side wall 15 1st step 16 2nd step 17 1st recessed part 18 2nd recessed part 20, 20 'Fixed contact 21 Contact part 22 Soldering part 30, 30' Movable contact 31 Top surface 32 Side surface 33 Protrusion 33 'Convex piece 40, 40' Actuating member 41 Movable part 42, 42 'Pressing part 43 Guide part 44 Hole 45, 45' Actuating part 50, 50 'Lid body 51 Main body 52 Supporting leg 53 Support piece 54, 54 'Elastic piece

Claims (8)

A housing,
A fixed contact provided on the inner bottom of the housing,
A lid attached to the housing and provided with an elastic piece,
A movable contact, which is provided between the fixed contact and the lid, and is provided with a protrusion that performs an operation of contacting or separating from the fixed contact,
A pressing part, and an actuation part including an actuation part installed between the movable contact and the lid,
With
When the pressing part of the operating part is pressed, the operating part of the operating part moves by the pressing force of the elastic piece of the lid, and the movable contact is deformed by the pressing force of the operating part to move the movable part. A push button switch, wherein the protruding portion of the contact is moved downward and electrically connected to the fixed contact to complete a switching operation.   The fixed contact is provided with a plurality of contact portions, while the movable contact is provided with a plurality of protrusions, and each of the protrusions is provided symmetrically with one of the contact portions. The push button switch according to claim 1.   The push button switch according to claim 2, wherein the movable contact has a top surface and a side surface extending at a predetermined angle from an edge of the top surface.   The push-button switch according to claim 3, wherein the protrusion is a plurality of protrusions protruding downward from a top surface.   The push-button switch according to claim 3, wherein the protruding portion is a plurality of convex pieces protruding downward from a top surface.   The push button switch according to claim 5, wherein the opening at the top is provided in a circular shape or a shape similar to a circular shape.   7. The push button switch according to claim 6, wherein the convex piece extends from the edge of the top opening at the same interval. The push-button switch according to claim 1, wherein a V-shaped tank is formed so as to protrude downward from a central portion of the lid, and the elastic piece is formed.

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