JP6427761B2 - Push switch - Google Patents

Description

  The present invention relates to a push switch mounted on an input operation unit or the like of various electronic devices.

  In recent years, in an input operation unit of various electronic devices, a lateral push type push switch that performs a pressing operation in parallel to a board surface of a mounted wiring board is often used. The applicant has proposed that type of push switch according to Patent Document 1, and the push switch will be briefly described below.

  FIG. 7 is a sectional view of a conventional push switch, FIG. 8 is an exploded perspective view thereof, and FIG. 9 is a view showing a mounted state of the push switch.

  As shown in the figure, the conventional push switch 1 includes a resin case 10 formed in a substantially L shape in a side view, and a terminal 27 and a terminal 29 provided by being led out from the case 10. .

  The case 10 is made of resin and is on one side of the L shape, and is a thin plate shape that extends vertically downward, and on the other side of the L shape. And a second main body portion 12 extending in a straight line.

  The first main body portion 11 is formed in a horizontally long substantially rectangular shape when viewed from the front. As shown in FIG. 8, the central portion is provided with a recess that opens to the front, and a switch contact portion is formed in the recess.

  The switch contact portion is composed of a movable contact 15 formed in a dome shape from an elastic metal thin plate, a central contact 17 and an outer contact 19 made of a thin metal plate, and the central contact 17 and the outer contact 19 are connected via the movable contact 15. It is configured to be close to and away from each other.

  An insulating sheet 20 made of an insulating film is mounted on the front surface of the first main body 11 so as to cover the recess, and a cylindrical pressing member 22 is fixed to the front surface position of the insulating sheet 20.

  On one side surface of the second main body portion 12, a lead-out portion 17 </ b> A from the central contact 17 is disposed rearward, and is caulked from above at a rear position and fixed to the second main body portion 12. Similarly, on the other side surface of the second main body portion 12, a lead-out portion 19 </ b> A from the outer contact 19 is disposed rearward and is caulked from above at the rear position and fixed to the second main body portion 12.

  Further, a terminal 27 is formed in the lead-out portion 17A by being bent on the bottom surface side of the second main body portion 12. Similarly, the lead portion 19A is also bent to the bottom surface side of the second main body portion 12 to form a terminal 29 (see FIG. 7).

  And this push switch 1 was comprised so that the gravity center position in the completed product single-piece | unit may exist in the 2nd main-body part 12 side.

  As shown in FIG. 9, the push switch 1 is used by being soldered and mounted on a corresponding wiring board 30.

  As a state of arrangement on the wiring board 30, the first main body 11 is positioned outward from the front end of the wiring board 30, the second main body 12 is placed on the wiring board 30, and the terminals 27 and terminals are arranged. 29 was soldered to the corresponding land 37 and land 39 and mounted.

JP 2013-149351 A

  The push switch 1 is preferable because it can be mounted in a rectangular area extending from the front end of the wiring board 30 to the back. However, as the size of the device is reduced, the demand for reducing the mounting area is increased. ing. In order to respond to this, if the size of the second main body portion 12 is shortened, for example, while maintaining the configuration of the push switch 1, the position of the center of gravity moves to the front end portion side of the wiring board 30. Moreover, since the soldering areas of the terminals 27 and 29 are also reduced, there is a problem that the soldering strength of the push switch 1 itself is weakened.

  The present invention solves such a conventional problem, and a push switch having a configuration capable of reducing the depth of a rectangular mounting area required for mounting and ensuring soldering strength during mounting. The purpose is to provide.

To achieve the above object, according to the present invention, a front first main body portion and a rear second main body portion are integrally formed in an L shape, connected to the switch contact portion, a case having a switch contact portion, A push switch comprising a terminal derived from a case and a metal cover attached to the case, wherein the metal cover includes a top plate located on the second body part, and a second body part. Side plate portions along the left and right side surfaces, solderable front leg portions provided on the side plate portions, and extending downward from the top plate, are disposed at positions on the rear side of the second main body portion. A solderable rear leg portion, and the terminal is linearly extended downward from the second main body portion at the rear portion of the second main body portion, and the lower end of the board surface is mounted. A shape with a length that is opposite to each other with a predetermined gap There, and the terminal is positioned behind the rear leg in a side view, it is an push switch configuration.

  According to the present invention, it is possible to prevent the position of the center of gravity from moving to the front end side of the wiring board, and to provide a rectangular mounting area that requires a small depth dimension during mounting. Can do. Further, since the soldering strength is compensated by the rear leg portion in addition to the front leg portion of the metal cover, an advantageous effect that it can be realized as a push switch having a sufficient soldering strength is obtained.

Sectional drawing of the push switch by embodiment of this invention Diagram for explaining the mounting state Diagram for explaining the mounting state Diagram for explaining the mounting state The figure for demonstrating the mounting state of the push switch made into the modification The figure for demonstrating the mounting state of the push switch made into the modification Cross section of a conventional push switch Exploded perspective view The figure which shows the mounting state of the same push switch

  A push switch according to the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the part of the same structure as the past, and description is simplified.

(Embodiment)
FIG. 1 is a cross-sectional view of a push switch according to an embodiment of the present invention, and FIGS. 2 to 4 are views for explaining the mounting state.

  As shown in the figure, the push switch 50 according to the embodiment of the present invention includes a resin case 60 formed in a substantially L shape in a side view, a terminal 71 and a terminal 73 led out from the case 60. And a metal cover 80 attached to the case 60.

  The case 60 is made of resin and is on one side of the L shape, and is a thin plate shape that extends vertically downward, and on the other side of the L shape. The second main body portion 62 extends in a single body, and both are integrally formed.

  The first main body 61 is formed in a horizontally long substantially rectangular shape when viewed from the front, and a recess having an opening at the front is provided at the center thereof, and a switch contact portion is configured in the recess as in the conventional case. is there. The switch contact portion includes a dome-shaped movable contact 15, a central contact 17, and an outer contact 19 that does not appear in FIG. 1 and the like, and the central contact 17 (one fixed contact) and the outer side via the movable contact 15. It is the same as in the prior art that the contact point 19 (the other fixed contact point) can be contacted and separated.

  An insulating sheet 75 made of an insulating film is attached to the front surface of the first main body 61 so as to cover the recess. A cylindrical pressing member 77 is disposed between the insulating sheet 75 and the movable contact 15 (see FIG. 1).

  The second main body 62 is formed in a substantially rectangular parallelepiped outer shape when viewed from above, and a metal cover 80 is attached from above.

  The terminal 71 and the terminal 73 are provided at the rear portion position of the second main body portion 62 so as to protrude straight downward. The height positions of the lower ends of the terminals 71 and 73 are set to a length that is positioned with a predetermined gap with respect to the board surface to be mounted. The terminal 71 is connected to one fixed contact of the switch contact portion, and the terminal 73 is connected to the other fixed contact of the switch contact portion. In addition, the routing location between each fixed contact of the switch contact portion and the terminal 71 and the terminal 73 is embedded in the case 60.

  The metal cover 80 is bent along the board surface from the top plate 81, the side plate portions 82 bent down from the top plate 81 along the left and right side surfaces of the second main body portion 62 of the case 60, respectively. The solderable front leg 84 projecting substantially horizontally outward and the rear surface side position of the second main body 62 of the case 60 are bent down from the top plate 81 and straight down straight. And a rear leg 86 extending in the direction.

  As can be seen from FIG. 4, the rear leg portion 86 of the metal cover 80 is provided in a shape in which the bent portion from the top plate 81 is narrow and the lower end position is wide.

  And the rear leg part 86 of the metal cover 80 is located ahead of the arrangement position of the terminal 71 and the terminal 73 as seen from FIG. In this configuration, the rear leg 86 is also solderable.

  As described above, the push switch 50 according to the embodiment is configured. As shown in FIGS. 2 to 4, the push switch 50 is used by being soldered and mounted on a corresponding wiring board 90.

  As an arrangement state on the wiring board 90, the first main body 61 is positioned outward from the front end of the wiring board 90 and the second main body 62 is placed on the wiring board 90.

  Lands 91 and lands 93 for the terminals 71 and 73, lands 94 for the front legs 84, and lands 96 for the rear legs 86 are provided on the board surface on which the wiring board 90 is mounted.

  In a state before soldering, the terminals 71 and 73 are positioned such that the lower ends of the terminals 71 and 73 face the board surface on the upper surface side of the wiring board 90 with a predetermined gap, and the lower end of the rear leg 86 also has a predetermined gap. The wiring board 90 is positioned to face the board surface on the upper surface side. Then, the push switch 50 is soldered and mounted on the wiring board 90 by passing through a reflow furnace.

  Here, the second main body 62 of the push switch 50 has a shorter depth than the conventional product. The terminal 71 and the terminal 73 are projected straight downward at the rear position of the second main body 62, and the metal cover 80 is mounted on the second main body 62 from above. If the metal cover 80 is attached to the second main body portion 62 in this way, the center of gravity of the push switch 50 can be prevented from moving toward the first main body portion 61, and the push switch 50 is moved to the front side before soldering. Can be prevented from falling down. Further, with the push switch 50 having the above configuration, the depth dimension of the mounting area required from the front end of the wiring board 90 may be smaller than that of the conventional product.

  In order to obtain a predetermined soldering strength of the push switch 50, it is preferable to solder the metal cover 80 to the front position of the wiring board 90. In this configuration, the terminal 71 and the terminal 73 have the shape described above. As what is arranged at the rear part of the case 60, the front leg 84 of the metal cover 80 attached to the case 60 is soldered at the front position of the wiring board 90.

  The terminals 71 and 73 are linearly extended downward, and their lower ends are located with a predetermined gap on the substrate surface. In this case, the size of the mounting area from the front end of the wiring board 90 including the terminal 71 and the terminal 73 can be reduced. In addition, the front leg portion 84 can be formed in a shape having a wide width in the front-rear direction, so that the soldering strength can be improved.

  Further, in this configuration, the metal cover 80 is provided with a rear leg portion 86 that linearly extends downward, and the rear leg portion 86 is also positioned with a predetermined gap in a state where the lower end faces the board surface to be mounted, and Solderable configuration. The rear leg 86 is located on the front side of the terminal 71 and the terminal 73 in a side view and is configured to be solderable.

  The reason why the rear leg portion 86 is provided is to receive a force as a so-called refilling rod on the front side of the soldering fixing position of the terminal 71 and the terminal 73 and on the side close to the center of gravity position of the switch. And if it is the structure which solders the back leg part 86, since the effect becomes large, it is preferable. If necessary, the rear leg portion 86 may be configured not to be soldered. In addition, when it has the back leg part 86, it becomes possible to use a thin metal plate for the terminal 71 and the terminal 73, for example. In addition, since the top plate 81 of the metal cover 80 presses the second main body portion 62 from above, the top plate 81 and the rear leg portion 86 are also prevented from peeling off the front side from the substrate surface.

  Next, the operation will be described. When the movable contact 15 is pushed backward through the insulating sheet 75 and the pressing member 77 in the mounting state on the wiring board 90, the movable contact 15 is elastically deformed and the switch contact portion is turned on. (The center contact 17 and the outer contact 19 are electrically connected), and the terminal 71 and the terminal 73 are in an electrically conductive state.

  When the pushing force is removed, the movable contact 15 is self-restored to the original protruding shape to push back the pressing member 77 and the insulating sheet 75, and the switch contact portion returns to the original OFF state.

  As described above, with the push switch 50, the position of the center of gravity does not move to the front end side of the wiring board 90, and the depth dimension of the rectangular mounting area required for mounting is small. It can be provided as a finished product.

  Further, since the front leg 84 and the rear leg 86 of the metal cover 80 are soldered in addition to the soldering of the terminals 71 and 73 themselves, it is possible to realize the push switch 50 in which the soldering strength is ensured.

  Next, a modification of the push switch 50 will be described with reference to FIGS.

  The push switch 50A of the modified example shown in FIGS. 5 and 6 is provided with a rear leg 86A in which the length and shape of the rear leg 86 of the metal cover 80 are different from the push switch 50 described above. It is said. In FIGS. 5 and 6 and the following description, the reference numerals of the parts associated with the metal cover 80 are used as they are.

  As can be seen from FIGS. 5 and 6, the rear leg portion 86 </ b> A is provided with a length such that the lower end thereof is positioned below the board surface to be mounted. In addition, although the width dimension of 86 A of back legs has shown the fixed thing, the shape where a lower end side is wide may be sufficient.

  The push switch 50A is mounted on the corresponding wiring board 90A. The wiring board 90A is different from the wiring board 90 described above in that a through hole 97 is provided in a land 96A corresponding to the rear leg portion 86A. The rest of the configuration is the same as that of the wiring board 90, and thus description thereof is omitted.

  The push switch 50A is soldered and mounted by inserting the lower portion of the rear leg 86A into the through hole 97. The soldering state of other portions is the same as described above. The through hole 97 is preferably a so-called through hole.

  In the case of this push switch 50A, since the lower part of the rear leg 86A is inserted into the through hole 97, the durability is further increased against the pushing force applied in the operating state, and the peeling from the wiring board 90A. Can be provided as reduced.

  The switch contacts of the push switches 50 and 50A may have a configuration other than that described above.

  The push switch according to the present invention can be provided as a rectangular mounting area required for mounting with a reduced depth dimension and with a sufficient soldering strength, and is useful for an input operation section of various electronic devices. It is.

DESCRIPTION OF SYMBOLS 15 Movable contact 17 Center contact 19 Outer contact 50, 50A Push switch 60 Case 61 1st main-body part 62 2nd main-body part 71, 73 Terminal 75 Insulation sheet 77 Press member 80 Metal cover 81 Top plate 82 Side plate part 84 Front leg part 86 86A Rear leg 90, 90A Wiring board 91, 93, 94, 96, 96A Land 97 Through hole

Claims (5)

A case in which a front first body part and a rear second body part are integrally formed in an L shape and have a switch contact part;
A terminal connected to the switch contact portion and derived from the case;
A push switch comprising a metal cover attached to the case,
The metal cover includes a top plate located on the second main body, a side plate along the left and right side surfaces of the second main body, a solderable front leg provided on the side plate, A solderable rear leg that extends downward from the top plate and is disposed at a position on the rear side of the second main body,
The terminal is linearly extended downward from the inside of the second main body portion at the rear portion of the second main body portion, and has a length at which a lower end of the terminal faces a mounting surface with a predetermined gap therebetween. A shape,
And the said terminal is located behind the said back leg part by side view,
Push switch characterized by that. 2. The push switch according to claim 1, wherein a lower end of the rear leg portion is positioned to face the mounting board surface with a predetermined gap. The push switch according to claim 2, wherein a width in the left-right direction of the lower end of the rear leg portion is wider than a width in the left-right direction of a root portion connected to the top plate. The switch contact portion has a first fixed contact and a second fixed contact,
The terminal includes one terminal connected to the first fixed contact, and the other terminal connected to the second fixed contact,
The one terminal extends to a position between an arrangement position of the rear leg and the left side surface of the second main body when the second main body is viewed from the rear.
The other terminal extends to a position between an arrangement position of the rear leg and the right side surface of the second main body when the second main body is viewed from the rear. 1. A push switch according to 1. 2. The push switch according to claim 1, wherein a lower end of the rear leg is positioned below a surface of the board to be mounted.

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