JP4426884B2 - Push-on switch - Google Patents

Description

  The present invention relates to a push-on switch.

  Japanese Patent No. 3286142 (Patent Document 1) shows a push-on switch having a switch body made of synthetic resin, a fixed contact member, and a movable contact member. The fixed contact member has a fixed contact and a conductive portion (first metal plate) connected to the fixed contact. The movable contact member has a dish-shaped tact conductive plate curved so as to protrude in a direction away from the fixed contact, and an electrode forming piece (second metal plate) connected to the tact conductive plate. Yes. In this push-on switch, both the conductive portion (first metal plate) of the fixed contact member and the electrode forming piece (second metal plate) connected to the tact conductive plate are embedded in the switch body by insert molding. ing. The switch body is integrally provided with a caulking wall, and the tact conductive plate is fitted into the caulking wall to attach the tact conductive plate to the switch body.

FIG. 6 of JP-A-2002-231088 (Patent Document 2) shows a push-on switch having a switch body made of synthetic resin and a movable contact member arranged on the switch body. The movable contact member includes a belt-shaped tact conductive plate and an electrode forming piece provided integrally with the tact conductive plate, and is attached to the switch body without being insert-molded. Specifically, a projecting piece is provided on the electrode forming piece, and the projecting piece is inserted into a through hole of the switch body and locked to attach the movable contact member to the switch body.
Japanese Patent No. 3286142 Japanese Patent Laid-Open No. 2002-231108 (FIG. 6)

  However, in the push-on switch shown in Patent Document 1, both the conductive portion (first metal plate) of the fixed contact member and the electrode forming piece (second metal plate) connected to the tact conductive plate are insert-molded. Therefore, the arrangement of the insert member is complicated. Therefore, the manufacture of the push-on switch becomes troublesome and it is difficult to reduce the size of the push-on switch. Further, since the tact conductive plate is fitted into the caulking wall and the tact conductive plate is attached to the switch main body, the tact conductive plate cannot be firmly attached to the switch main body.

  In the push-on switch shown in Patent Document 2, the movable contact member is attached to the switch body by inserting and locking the protruding piece of the electrode forming piece into the through hole of the switch body. It was not possible to fix it firmly. In particular, when a tact conductive plate is used, the attachment of the movable contact member becomes considerably unstable.

  An object of the present invention is to provide a push-on switch that is easy to manufacture and can be miniaturized.

  Another object of the present invention is to provide a push-on switch capable of firmly fixing a movable contact member to a switch body.

  The push-on switch to be improved by the present invention is a switch body made of synthetic resin in which a fixed contact member is insert-molded so that the fixed contact is exposed from the surface, and is disposed on the surface of the switch main body and from the fixed contact. And a movable contact member configured to include a dish-shaped tact conductive plate that is curved so as to protrude in the direction of separation. In the present invention, the switch body is integrally provided with one or more conductive plate receiving upright walls for forming a tact conductive plate receiving portion for receiving the tact conductive plate, and the one or more conductive plate receiving upright walls are provided. A conductive plate movement preventing structure is configured in which the portion is heated and deformed toward the tact conductive plate disposed in the tact conductive plate receiving portion to prevent the tact conductive plate from moving relative to the switch body. The movable contact member includes one or more electrode forming pieces integrally provided on the tact conductive plate. The switch body is integrally provided with one or more electrode forming piece receiving standing wall portions that form electrode forming piece receiving portions that receive at least a part of the one or more electrode forming pieces positioned on the surface of the switch body. It has been. The electrode forming piece movement blocking structure in which the one or more electrode forming piece receiving standing wall portions are heated and deformed toward the one or more electrode forming pieces to prevent the one or more electrode forming pieces from moving relative to the switch body. Is configured.

  In the present invention, since only the fixed contact member is embedded in the switch body by insert molding, the arrangement configuration of the insert member can be simplified. Therefore, the push-on switch can be easily designed and the push-on switch can be downsized. Further, in the present invention, the conductive plate movement that prevents the tact conductive plate from moving with respect to the switch body by heat-deforming the standing plate portion for receiving the conductive plate integrally provided in the switch body toward the tact conductive plate. Electrode formation which constitutes a blocking structure and prevents the electrode forming piece from moving relative to the switch body by heating and deforming the electrode forming piece receiving standing wall portion integrally provided in the switch body toward the electrode forming piece Since the single movement blocking structure is configured, the movable contact member that is not insert-molded can be firmly fixed to the switch body with a small number of parts. The thickness of the switch is substantially determined by the thickness of the switch body. Therefore, if the thickness of the switch body is reduced, the thickness of the switch can be made thinner than before.

  It is preferable that the one or more conductive plate receiving upright wall portions include a pair of arcuate wall portions facing each other with the tact conductive plate interposed therebetween. In this way, there is no need to prepare a separate part for preventing and fixing the tact conductive plate, and the movable contact member can be firmly switched by simply heat-deforming (heat-caulking) the standing plate for receiving the conductive plate. Can be fixed to the body.

  The one or more electrode forming pieces can be composed of a pair of electrode forming pieces. In this case, the switch body is provided with a pair of electrode forming piece receiving upright wall portions corresponding to the pair of electrode forming pieces, and the pair of electrode forming piece receiving upstanding wall portions of the electrode forming piece It is preferable that at least part of the wall portions are opposed to each other. And it is preferable to arrange | position a pair of circular arc-shaped wall part and a pair of wall part in the position 90 degree apart centering on the stationary contact. If it does in this way, a movable contact member can be firmly fixed to a switch main body with the standing wall part for receiving a conductive plate and the standing wall part for electrode formation piece reception of a small number.

  It is preferable that the fixed contact member is integrally provided with one or more terminal portions exposed on the outer surface of the switch body. In this way, the structure of the fixed contact member can be simplified, and the fixed contact member can be connected to an appropriate position such as a circuit board by soldering the terminal portion.

  The fixed contact member is configured to include a pair of arm portions having one end connected to the fixed contact and having a terminal portion at the other end, and the pair of arm portions extend in a direction in which the pair of arcuate wall portions are arranged. It is preferable to insert in. Further, it is preferable that there is an angle difference of approximately 90 degrees between the direction in which the pair of electrode forming pieces extends and the direction in which the pair of arm portions extend. If it does in this way, arrangement arrangement of a movable contact member and a fixed contact member can be simplified, and size reduction of a push-on switch can be attained easily.

  The pair of electrode forming pieces integrally includes an extending portion connected to the tact conductive plate and an electrode portion connected to an end portion of the extending portion. The electrode portion extends along the side surface of the switch body and the switch body. It can be formed by bending from the extending portion so as to extend from the front surface side to the back surface side. In this case, it is preferable to form a recess opening in the vicinity of the end of the electrode portion of the switch body on the back surface and the electrode portion side of the switch body. In this way, when the electrode portion is soldered to a predetermined position of the circuit on the circuit board, the solder enters the recess, and a large amount of solder around the electrode portion can be secured. For this reason, the solderability of the electrode portion is enhanced.

  The switch body has a substantially octagonal outline as viewed from the movable contact member side, and the electrode portions of the pair of electrode forming pieces are positioned in the vicinity of a pair of opposing sides of the octagonal switch body. And it is preferable that the terminal part of a fixed contact member is located in the vicinity of the other pair of opposite sides of the octagonal switch body. If it does in this way, a switch main body can be reduced in size and a push-on switch can be reduced in size easily.

  Also, a synthetic resin switch body in which a fixed contact member is insert-molded so that the fixed contact is exposed from the surface, and a dish-like shape that is arranged on the switch body and curved so as to protrude away from the fixed contact For a push-on switch having a movable contact member including a tact conductive plate, the switch body preferably has an approximately octagonal outline as viewed from the movable contact member side. In such a push-on switch, the switch body can be downsized and the push-on switch can be easily downsized.

  In another invention of the present application, a switch body made of synthetic resin in which a fixed contact member is insert-molded so that the fixed contact is exposed from the surface, and so as to be protruded in a direction away from the fixed contact disposed on the switch body. the push-on switch having a movable contact member which is configured to include a curved dished tact conductive plate directed to the central portion of the fixed contact, the recess having a bottom which is press-formed open to the tact conductive plate side Form. Alternatively, a bottomed concave portion having a peripheral portion that opens to the tact conductive plate side and protrudes to the tact conductive plate side is formed. As such a recess, one having a cross shape as viewed from the tact conductive plate side can be adopted. Conventionally, as the contact easily with the fixed contact and the tact conductive plate, that a through hole is formed it is known to the central portion of the fixed contact. However, it is required to make the fixed contact and the tact conductive plate easier to contact. When a press-formed bottomed recess opening in the tact conductive plate is formed at the center of the fixed contact, a portion protruding toward the tact conductive plate is formed around the recess. For this reason, the projecting portion and the tact conductive plate come into contact with each other, whereby the fixed contact and the tact conductive plate are easily brought into contact with each other.

  According to the present invention, since only the fixed contact member is embedded in the switch body by insert molding, the arrangement configuration of the insert member can be simplified. Therefore, the push-on switch can be easily designed and the push-on switch can be downsized. Further, in the present invention, the conductive plate movement that prevents the tact conductive plate from moving with respect to the switch body by heat-deforming the standing plate for receiving the conductive plate provided integrally with the switch body toward the tact conductive plate. Electrode formation which constitutes a blocking structure and prevents the electrode forming piece from moving relative to the switch body by heating and deforming the electrode forming piece receiving standing wall portion integrally provided in the switch body toward the electrode forming piece Since the single movement blocking structure is configured, the movable contact member that is not insert-molded can be firmly fixed to the switch body.

  The best mode for carrying out the present invention will be described below with reference to the drawings. 1A to 1C are a plan view, a front view, and a right side view of a push-on switch according to an embodiment of the present invention. 2 is a cross-sectional view taken along line II-II in FIG. 1A, FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1A, and FIG. 4 is a push-on shown in FIG. It is a reverse view of a switch. As shown in the drawings, the push-on switch of this example includes a switch body 1, a fixed contact member 3, and a movable contact member 5. The switch body 1 is made of a synthetic resin and has an octagonal substantially flat plate shape. The switch body 1 includes a front surface 7, a back surface 9, four long side surfaces 11, 13, 15, 17 configured along the octagonal long side, and four configured along the octagonal short side. It has short sides 19, 21, 23, 25. The four long side surfaces 11, 13, 15, 17 and the four short side surfaces 19, 21, 23, 25 are arranged alternately. As shown in FIGS. 2 and 3, a large-diameter annular recess 7 a and a small-diameter circular recess 7 b are formed concentrically on the surface 7. On the back surface 9, four concave portions 9 a to 9 d are formed along the short side surfaces 19, 21, 23, 25.

  The fixed contact member 3 is made of a copper plate and is insert-molded in the switch body 1. The fixed contact member 3 is integrally provided with a fixed contact 27, a pair of arm portions 29, and a pair of terminal portions 31. The fixed contact 27 has a disk shape and is disposed in the recess 7 b of the switch body 1. In the central portion of the fixed contact 27, a cross-shaped bottomed concave portion 27a that opens to the tact conductive plate 33 side described later is formed. In this example, the concave portion 27a is formed by pressing. When the concave portion 27a is formed by pressing, a portion 27b protruding toward the tact conductive plate 33 is formed around the concave portion 27a as shown in FIG. Therefore, when the protruding portion 27b and the tact conductive plate 33 are in contact with each other, the fixed contact 27 and the tact conductive plate 33 are easily in contact with each other.

  The pair of arm portions 29 are arranged with the fixed contact 27 facing each other so that one end is connected to the fixed contact 27 and the other end has a terminal portion 31. The pair of arm portions 29 are embedded in the switch body 1 by insert molding so as to extend from the front surface 7 of the switch body 1 to the recesses 9a and 9c on the back surface 9, respectively.

  The pair of terminal portions 31 are bent from the arm portion 29 so as to extend along the short side surfaces 19 and 23 so as to be exposed on the outer surface of the switch body 1 and from the back surface 9 side to the front surface 7 side of the switch body 1.

  Also the movable contact member 5 is formed of a copper plate in the same manner as the fixed contact member 3 includes integrally a tact conductive plate 33 and a pair of electrodes forming member 35. The tact conductive plate 33 is disposed on the surface 7 of the switch body 1 and has a dish-like shape that is curved so as to protrude in a direction away from the fixed contact 27. The tact conductive plate 33 is received by a pair of tact conductive plate receiving portions 37 provided integrally with the switch body 1. Tact conductive plate receiving portion 37, a pair of arcuate wall conductive plate made of unit-receiving upright wall portion 39 (FIGS. 1 to 3 in shown in dashed lines) tact conductive plate 33 which faces in between the tact conductive plate 33 It is formed by being heat-deformed toward the surface. As a result, a conductive plate movement blocking structure is configured to block the tact conductive plate 33 from moving relative to the switch body 1.

  Each of the pair of electrode forming pieces 35 includes an extending portion 41 and an electrode portion 43 connected to an end portion of the extending portion 41. The extending portion 41 is disposed to face the tact conductive plate 33 so as to be connected to the tact conductive plate 33. The extending portion 41 is received by a pair of electrode forming piece receiving portions 45 provided integrally with the switch body 1. The electrode forming piece receiving portion 45 is a pair of electrode forming piece receiving rising wall portions 47 (shown by broken lines in FIGS. 1 to 3) that are formed of a pair of linear wall portions facing each other with at least a part of the extending portion 41 in between. ) Is heated and deformed toward the extending portion 41. Thereby, the electrode formation piece movement prevention structure which blocks | prevents that a pair of electrode formation piece 35 moves with respect to the switch main body 1 is comprised. In this example, the pair of arcuate wall portions (39) and the pair of linear wall portions (47) are disposed at positions 90 degrees apart from each other with the fixed contact 27 as the center. Thereby, an angle difference of approximately 90 degrees is formed between the direction in which the pair of electrode forming pieces 35 extends and the direction in which the pair of arm portions 29 of the fixed contact member 3 extend.

  The electrode portion 43 is bent from the extending portion 41 so as to extend along the short side surfaces 21 and 25 and from the front surface 7 side of the switch body 1 to the vicinity of the recesses 9b and 9d on the back surface 9. In addition, the dimension of the electrode part 43 may be lengthened and bent so that the end part of the electrode part 43 enters the recesses 9b and 9d as shown in FIG.

  After the push-on switch of this example is disposed on the circuit board, the terminal part 31 and the electrode part 43 are soldered to predetermined positions of the circuit on the circuit board. In the push-on switch of this example, since the concave portion 9d is provided, as shown in FIG. 7, when the electrode portion 43 is soldered, the solder enters the concave portion 9d, and the amount of solder around the electrode portion 43 is reduced. Many can be secured. Therefore, the solderability of the electrode part 43 becomes high.

  According to the push-on switch of this example, since only the fixed contact member 3 is embedded in the switch body 1 by insert molding, the arrangement configuration of the insert member can be simplified. Therefore, the push-on switch can be easily designed and the push-on switch can be downsized. Further, the conductive plate receiving upright wall portion 39 provided integrally with the switch main body 1 is heated and deformed toward the tact conductive plate 33 to prevent the tact conductive plate 33 from moving with respect to the switch main body 1. The electrode formation piece 35 is moved relative to the switch body 1 by constituting the movement blocking structure and heating and deforming the electrode formation piece receiving standing wall 47 integrally provided in the switch body 1 toward the electrode formation piece 35. Since the electrode forming piece movement blocking structure is configured to prevent this, the movable contact member 5 that is not insert-molded can be firmly fixed to the switch body 1.

(A)-(C) are the top view, front view, and right view of a push-on switch of one embodiment of the present invention. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is a reverse view of the push-on switch shown in FIG. It is the elements on larger scale of the push-on switch shown in FIG. It is the elements on larger scale of the push-on switch of other embodiment of this invention. It is the elements on larger scale when attaching the push-on switch shown in FIG. 1 to a circuit board.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Switch main body 3 Fixed contact member 5 Movable contact member 27 Fixed contact 29 Arm part 31 Terminal part 33 Tact conductive plate 35 Electrode formation piece 37 Tact conductive plate receiving part 39 Standing wall part for receiving conductive plate 45 Electrode formation piece receiving part 47 Electrode Standing wall for receiving molded piece

Claims (8)

A synthetic resin switch body in which a fixed contact member is insert-molded so that the fixed contact is exposed from the surface;
A push-on switch having a movable contact member disposed on the surface of the switch body and including a dish-shaped tact conductive plate curved so as to protrude in a direction away from the fixed contact;
The switch body is integrally provided with one or more conductive plate receiving upright wall portions for forming a tact conductive plate receiving portion for receiving the tact conductive plate,
The one or more conductive plate receiving upright wall portions are heated and deformed toward the tact conductive plate disposed in the tact conductive plate receiving portion to prevent the tact conductive plate from moving relative to the switch body. Conductive plate movement prevention structure is configured,
The movable contact member includes one or more electrode forming pieces integrally provided on the tact conductive plate,
The switch body is integrally provided with one or more electrode-forming piece receiving standing wall portions that form electrode forming piece receiving portions that receive at least a part of the one or more electrode-forming pieces located on the surface of the switch body. It is provided in
The one or more electrode forming piece receiving standing wall portions are heated and deformed toward the one or more electrode forming pieces to prevent the one or more electrode forming pieces from moving relative to the switch body. A push-on switch having a movement blocking structure.   2. The push-on switch according to claim 1, wherein the at least one conductive plate receiving upright wall portion includes a pair of arcuate wall portions facing each other with the tact conductive plate interposed therebetween. The one or more electrode forming pieces comprise a pair of electrode forming pieces,
The switch body is provided with a pair of electrode forming piece receiving standing wall portions corresponding to the pair of electrode forming pieces,
The standing wall portion for receiving the pair of electrode forming pieces comprises a pair of linear wall portions facing each other with the at least part of the electrode forming piece in between,
3. The push-on switch according to claim 2, wherein the pair of arcuate wall portions and the pair of linear wall portions are disposed at positions separated by 90 degrees with the fixed contact as a center.   4. The push-on switch according to claim 1, wherein the fixed contact member is integrally provided with one or more terminal portions exposed on an outer surface of the switch body. 5. The fixed contact member includes a pair of arm portions having one end connected to the fixed contact and the other end having the terminal portion,
The push-on switch according to claim 4, wherein the pair of arm portions are inserted into the switch body so as to extend in a direction in which the pair of arcuate wall portions are arranged.   The push-on switch according to claim 5, wherein there is an angle difference of approximately 90 degrees between a direction in which the pair of electrode forming pieces extends and a direction in which the pair of arm portions extend. The pair of electrode forming pieces integrally includes an extending portion connected to the tact conductive plate and an electrode portion connected to an end of the extending portion,
The electrode portion is bent from the extending portion so as to extend along the side surface of the switch body and from the front surface side to the back surface side of the switch body,
4. The push-on switch according to claim 3, wherein a recess that opens to a back surface of the switch body and the electrode part side is formed near an end of the electrode part of the switch body. The switch body has a substantially octagonal outline as viewed from the movable contact member side,
In the vicinity of the pair of opposing sides of the octagonal switch body, the electrode portions of the pair of electrode forming pieces are respectively positioned.
7. The push-on switch according to claim 6, wherein terminal portions of the fixed contact member are positioned in the vicinity of a pair of opposing sides of the octagonal switch body.

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