JP2009170283A - Push-on switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a push-on switch capable of securing soldering strength of a terminal and aiming at downsizing, in one of a surface mounting type used as an input operating part of various electronic equipment. <P>SOLUTION: Flat-plate terminals 24 (24A, 24B) extended from the side face of a case 21 are formed by applying a punching process on a metal plate given surface treatment with conductive materials such as silver and tin, and then, insert-molded with resin and fixed to the case 21. A cross section by the punching process is exposed to an end part, but, a slanted face 25 is provided at a top face near a cross-section part so that the cross section where the raw fabric is exposed is narrowed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is a surface mount type push-on switch that is used in an input operation section of various electronic devices, has a flat terminal soldered and mounted on the upper surface of a wiring board, and is pressed from a direction parallel to the wiring board surface. It is about.

  In recent years, various electronic devices have been miniaturized and multi-functionalized, and accordingly, the mounting density of components on a wiring board has been increased, and surface-mounted electronic components are also frequently used. Further, thin electronic devices such as mobile phones are often provided with operation buttons on the side surfaces.

  A conventional surface mount type push-on switch that is used in the input operation unit of such an electronic device and is operated to be pressed from a direction parallel to the wiring board will be described below with reference to FIGS. .

  FIG. 9 is an external view of a conventional push-on switch, and FIG. 10 is a cross-sectional view thereof. In FIG. 9, 1 is a resin case having a recess in an upper surface opening. An outer contact (not shown) is fixed by insert molding at a position apart from 2A and the central contact 2A, and the terminal 4A connected to the central contact 2A and the terminal 4B connected to the outer contact are laterally formed from the opposite side surfaces of the case 1. Each pair extends in a flat plate shape. Further, each terminal 4 (4A, 4B) extends in parallel to the surface of the wiring board 10 described later according to surface mounting.

  Reference numeral 3 denotes a movable contact made of a thin metal plate having a circular dome shape with an opening on the lower surface. The outer peripheral portion of the movable contact is placed on the outer contact so as to be accommodated in the recess of the case 1. It is covered with a protective film 5 that is adhesively held.

  Reference numeral 6 denotes an operating body made of a resin integrally provided with a driving unit 6B behind the operating unit 6A. The operation body 6 is placed on the protective film 5 so that the operation portion 6A is positioned on the front side with respect to the case 1, and is movable in the front-rear direction along the upper surface of the case 1.

  7 is a cover made of a metal plate coupled to the case 1 from above the operation body 6, and is provided with a cut and bent portion 7A formed projecting toward the case 1 side at the center thereof, and the cut and bent portion 7A is It is located on the rear side of the drive unit 6B of the operating body 6, and the tip of the drive unit 6B is in contact with the inclined front surface of the cut and bent portion 7A.

  As described above, the conventional push-on switch is configured.

  In this conventional push-on switch, as shown in FIG. 11, the operation portion 6A is projected forward from the end face of the mounted wiring board 10, and each terminal 4 (4A, 4B) is soldered to the corresponding land. And mounted in a surface-mounted state.

  When the operation unit 6A is pushed horizontally backward in the mounted state, the operation body 6 moves horizontally on the protective film 5 along the upper surface of the case 1, and the tip of the drive unit 6B is cut off by the cover 7. A downward force is applied to the movable contact 3 that is guided downward along the bent portion 7A and located below.

  When the pressing force exceeds a predetermined magnitude, the central portion of the movable contact 3 is elastically reversed, and the lower surface of the central portion contacts the central contact 2A. As a result, the terminals 4 (4A, 4B) are short-circuited via the movable contact 3 and are switched on.

  Then, when the pushing to the operation unit 6A is released, the movable contact 3 is self-restored to the original upward convex shape, the driving unit 6B is pushed up, and the tip of the driving unit 6B is guided by the cutting and bending unit 7A. The operating body 6 was pushed back to the front side and returned to the original switch-off state shown in FIG.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP 2006-210195 A

  The conventional surface mount type push-on switch has been reduced in size and thickness due to an increase in the mounting density of electronic devices. However, the terminal 4 to be soldered is also reduced due to the downsizing of the switch, and the surface of the wiring board 10 is reduced. The area of the corresponding terminal 4 is reduced, and the terminal 4 is formed by using a metal plate that has been subjected to treatment such as conductive plating on both the front and back surfaces for soldering. It is exposed from the fabric and is difficult to solder. In particular, in a lateral push operation type switch that is pressed from a direction parallel to the surface of the wiring board 10, a large force is applied to the soldered portion of the terminal 4 during operation. There was a problem that it was necessary to ensure.

  The present invention solves such a conventional problem, and an object of the present invention is to provide a surface mount type push-on switch that can secure soldering strength of terminals and can be miniaturized. And

  In order to achieve the above object, the present invention has the following configuration.

  The invention according to claim 1 of the present invention is a surface mount type that includes a flat terminal that extends outward from the case and is soldered and mounted on the upper surface of the wiring board, and the operation direction is parallel to the wiring board surface. The terminal is formed by cutting a metal plate that has been subjected to a soldering process on both the front and back surfaces, and extends in a direction orthogonal to the operation direction to cut the terminal. The push-on switch is characterized in that an inclined surface is provided on the upper surface or the lower surface so that the surface is narrow, and since the inclined surface provided on the terminal is also a surface subjected to the soldering process, the inclined surface is provided. Also, soldering strength can be ensured by soldering, and the push-on switch can be downsized.

  According to a second aspect of the present invention, in the first aspect of the invention, the terminal is formed by cutting a metal plate that has been subjected to a soldering process on both the front and back surfaces, and is in a direction orthogonal to the operation direction. A groove extending along the inclined direction is provided on the inclined surface provided on the terminal, and the molten solder is guided by the groove along the inclined surface, and the solder to the inclined surface is provided. This makes it possible to more easily wrap around and secure the soldering strength.

  According to a third aspect of the present invention, in the first aspect of the present invention, the terminal is formed by cutting a metal plate that has been subjected to a soldering process on both the front and back surfaces, and is in a direction orthogonal to the operation direction. In addition to the action of the invention according to claim 1, the recess provided on the lower surface of the terminal is filled with solder. Since it can be in a soldered state, it has the effect of increasing the soldering portion and further improving the soldering strength.

  According to a fourth aspect of the present invention, there is provided a surface mount type push-on that includes a flat terminal that extends outward from the case and is soldered and mounted on the upper surface of the wiring board, and the operation direction is parallel to the wiring board surface. The switch, wherein the terminal is formed by cutting a metal plate that has been subjected to soldering processing on both front and back surfaces, and extends in a direction orthogonal to the operation direction, and is a lower surface that is on the wiring board side This is a push-on switch characterized in that a depression is provided on the terminal, and the depression provided on the bottom surface of the terminal can be in a soldered state in which the solder is filled. The switch can be downsized.

  As described above, according to the present invention, it is possible to obtain the advantageous effect that the soldering strength of the terminal can be ensured and the surface mount type push-on switch that can be downsized can be provided. .

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the part of the structure same as the structure demonstrated in the term of the prior art, and detailed description is simplified.

(Embodiment)
FIG. 1 is an external view of a push-on switch according to an embodiment of the present invention, FIG. 2 is a cross-sectional view thereof, FIG. 3 is a cross-sectional view taken along the line AA in FIG. The center contact 22A and an outer contact (not shown) are fixed in an exposed state by insert molding at a position spaced from the center contact 22A on the inner bottom surface of the recess. A pair of terminals 24A or 24B are respectively extended in a flat plate shape from the opposite side surfaces of the case 21 toward the side.

  Then, the movable contact 3 made of a thin metal plate having a circular dome shape with an opening on the lower surface is placed on the outer contact so as to be accommodated in the recess of the case 21, and the protective film 5 adheres to the upper surface of the opening of the recess. It is held and covers the recess. Further, the resin operation body 6 placed on the protective film 5 is disposed so that the operation portion 6 </ b> A protrudes in front of the case 21 and is movable in the front-rear direction along the upper surface of the case 21. Yes.

  A metal plate cover 7 is coupled to the case 21 from above the operation body 6. A cut and bent portion 7A formed to protrude toward the case 21 side at the center of the cover 7 is located on the rear side of the drive portion 6B of the operating body 6, and the tip of the drive portion 6B is located on the cut and bent portion 7A. It is in contact with the inclined front surface.

  Although these are the same as those described in the prior art, the push-on switch according to the present embodiment is integrated with the central contact 22A or the outer contact (hereinafter referred to as contact 22 when collectively referred to). The terminal 21 is characterized by a terminal 24A or 24B (hereinafter referred to as a terminal 24 when collectively referred to) that extends in a flat plate shape from the opposite side surfaces of the case 21.

  That is, each terminal 24 is formed by punching a metal plate having a surface treatment for soldering with a conductive material such as silver or tin on both the front and back surfaces, and then insert-molding with resin and fixed to the case 21. However, as shown in FIGS. 1 and 3, the cut surface by the punching process is exposed to the front upper surface side of each extending portion from the side surface of the case 21. The upper surface position in the vicinity of the cut portion is provided on the inclined surface 25 so that the cut surface where the cloth is exposed is narrowed. The inclined surface 25 is formed such that the processing surface for soldering is located on the surface.

  As a method of forming the inclined surface 25, for example, the lower surface of the terminal 24 extended from the case 21 after insert molding is received by a flat plate die, and the upper surface of the terminal 24 in the vicinity of the cut surface is formed from above with a punch with an inclined surface. Can be formed by striking. Further, as another forming method, when each contact 22 and terminal 24 are integrally punched from a metal plate, a stage that is punched with the punch with the inclined surface after the stage to be punched (cut) is the same progressive type. It may be formed in the mold, and according to this, efficient production is possible without increasing the number of manufacturing steps.

  As shown in FIG. 4, the push-on switch of the present invention configured as described above is a flat plate that extends in the direction orthogonal to the operation direction by projecting the operation portion 6A forward from the end surface of the wiring board 10 to be mounted. Each terminal 24 (24A, 24B) is soldered to a corresponding land and mounted in a surface mounted state.

  In this mounted state, when the operation unit 6A is pushed in horizontally, which is a direction parallel to the surface of the wiring board 10, the operation body 6 horizontally moves backward on the protective film 5, and the tip of the drive unit 6B is the cover 7's tip. It is guided downward along the cut and bent portion 7 </ b> A to apply a pressing force to the movable contact 3. When the pressing force exceeds a predetermined magnitude, the central part of the movable contact 3 is elastically reversed, the lower surface of the central part comes into contact with the central contact 22A, and the terminals 24A and 24B are connected via the movable contact 3. Shorted switch-on state.

  Then, when the pushing into the operating portion 6A is released, the movable contact 3 self-restores, the tip of the driving portion 6B is pushed up, guided by the cut and bent portion 7A of the cover 7, and the operating body 6 is pushed back to the front side. Returning to the original switch-off state shown in FIG.

  Here, in the above-described mounted state, the push-on switch according to the present embodiment has only the lower surface corresponding to the land soldered as the state of each soldered terminal 24 as shown in FIG. In addition, the mounting state in which the solder is also soldered so that the solder also wraps around the inclined surface 25. That is, each terminal 24 has an inclined surface 25 on the front upper surface portion as described above, and the front end portion on the side where the inclined surface 25 is provided has a narrow cut surface where the material fabric is exposed and wiring. It is assumed that it is located on the substrate 10 side. As a result, not only the lower surface of the terminal 24 but also the inclined surface 25 is soldered, and the inclined surface 25 is also soldered, so that the push-on switch has a strong soldering strength fixed on the wiring board 10. Can be.

  Thus, according to the present embodiment, since the inclined surface 25 is provided on the upper surface of the terminal 24 so that the cut surface where the material fabric is exposed becomes narrow, the lower surface of the terminal 24 is not only soldered but also inclined. Since the surface 25 is also soldered together, the soldering strength can be ensured, and a downsized push-on switch can be provided.

  In the above, in each of the pair of terminals 24A and 24B extending in the direction orthogonal to the operation direction from the both side surfaces of the case 21, the inclined surface 25 is provided only on the front side serving as the operation side of the push-on switch. As described above, it is further preferable to provide the inclined surfaces 25 so as to narrow the respective cut surfaces on the rear side and the side. In this case as well, it is important to form a soldering processing surface on the surface of each inclined surface 25 as described above.

  1 shows the form in which the inclined surface 25 is provided on the upper surface of the terminal 24, the form shown in FIG. 6 may be adopted. The terminal 24 of FIG. 6 is provided with an inclined surface 25 provided so as to narrow the cut surface on the lower surface side of the terminal 24, and this form can be soldered along the inclined surface 25, Since the volume with solder is increased, the soldering strength can be ensured. In addition, it is more preferable that the inclined surface 25 on the lower surface side is formed not only on the front side of the terminal 24 but also on the rear side and the side side as described above. Even in this case, it is important that the processing surface for soldering is located on the surface of the inclined surface 25 in the same manner.

  In addition, it is good also as a form as shown in FIG. The terminal 24 shown in FIG. 7 is obtained by further providing a V-shaped groove 26 in the inclined surface 25 along the inclined direction of the inclined surface 25 in addition to the one shown in FIG. At the time of soldering, the molten solder can easily travel around the inclined surface 25 through the groove 26, so that the solder can be surely placed on the inclined surface 25, and the soldering strength can be ensured. Although not shown, a plurality of the grooves 26 may be provided, or may be provided in an oblique direction with an angle with respect to the inclination direction of the inclined surface 25.

  Furthermore, it is good also as a form as shown in FIG. In the configuration shown in FIG. 8, a recess 27 is provided on the lower surface of the terminal 24 in the extending direction. The recess 27 fills the recess 27 with solder during soldering. Therefore, the soldering strength can be improved when a pressing force in the operation direction parallel to the surface of the wiring substrate 10 is applied. 8 has been described on the assumption that only the recess 27 is provided on the lower surface of the terminal 24 to be soldered, but it is more preferable to implement in combination with the configuration in which the inclined surface 25 is provided.

  Even in the case where the grooves 26 and the depressions 27 described above are provided, as in the case of the inclined surface 25, the processing surfaces for soldering may be formed on the surfaces thereof.

  The configuration of the switch contact section and the configuration of the switch mechanism section that operates the switch contact section may be other than those described above.

  The push-on switch according to the present invention has an advantageous effect that it can provide a surface mount type push-on switch that can secure the soldering strength of the terminal and can be downsized. This is useful when configuring an input operation unit of an electronic device.

1 is an external view of a push-on switch according to an embodiment of the present invention. Sectional view AA sectional view of FIG. Side view showing the state mounted on the same wiring board AA sectional view of FIG. 1 after the soldering Cross-sectional view of the main part after soldering showing another form External view of main parts of terminals showing other forms Cross-sectional view of the main part after soldering showing another form External view of conventional push-on switch Sectional view Side view showing the state mounted on the same wiring board

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Movable contact 5 Protective film 6 Operation body 6A Operation part 6B Drive part 7 Cover 7A Cutting and bending part 10 Wiring board 21 Case 22 Contact 22A Central contact 24, 24A, 24B Terminal 25 Inclined surface 26 Groove 27 Depression

Claims (4)

A surface-mounted push-on switch that extends outward from the case and includes a flat terminal that is soldered and mounted on the upper surface of the wiring board, and whose operation direction is parallel to the surface of the wiring board. It is formed by cutting a metal plate that has been soldered on both front and back surfaces, and extends in a direction perpendicular to the operation direction, and an inclined surface on the upper surface or lower surface so that the cut surface of the terminal is narrowed. A push-on switch characterized in that is provided. The terminal is formed by cutting a metal plate that has been subjected to a soldering process on both the front and back surfaces. The terminal extends in a direction orthogonal to the operation direction, and follows the inclined direction on the inclined surface provided on the terminal. The push-on switch according to claim 1, wherein a groove is provided. The terminal is formed by cutting a metal plate that has been processed for soldering on both the front and back sides. The terminal extends in a direction orthogonal to the operation direction and has a recess on the lower surface on the wiring board side. The push-on switch according to claim 1. A surface-mounted push-on switch that extends outward from the case and includes a flat terminal that is soldered and mounted on the upper surface of the wiring board, and whose operation direction is parallel to the surface of the wiring board. It is formed by cutting a metal plate that has been soldered on both the front and back sides, extending in a direction orthogonal to the operation direction, and having a recess on the lower surface on the wiring board side. A featured push-on switch.

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