KR100357926B1 - push button switch and method for manufacturing same - Google Patents

Abstract

When pressure from the oblique direction is applied to the push button 70 of the push button switch, the movable contact 40 moves in the housing 18 in the lateral direction (the direction orthogonal to the side wall 12), and the common fixed contact point. There arises a case where it deviates from (22), and therefore, the problem that the connection of the movable contact 40 and the common fixed contact 22 becomes unstable arises.

In order to solve the above problem, the housing 1 and a plurality of rows of terminals 2b, 3b, 4c protruding outward from the housing, and connected to the terminal and disposed on the inner bottom surface 1d of the housing A pair of central fixed contacts 2, a pair of lateral fixed contacts 3, 3 arranged on both sides of one of the center fixed contacts, and a pair of each arranged on both sides of the other of the central fixed contacts, respectively. A common stationary contact (4) and a movable contact (5) arranged to cover a center stationary contact and a lateral stationary contact, wherein the movable contact is connected to and mounted on a pair of common stationary contacts.

Description

Push button switch and method for manufacturing same

TECHNICAL FIELD The present invention relates to a push button switch and a method for manufacturing the same, and more particularly, to a push button switch and a method for manufacturing the same, which are suitable for use in a shutter such as a 35 mm electronic still camera or an APS still camera.

First, a conventional push button switch will be described with reference to the drawings.

14 is an exploded perspective view showing a conventional push button switch, and FIG. 15 is a plan view showing a switch body of a conventional push button switch.

As shown in FIGS. 14 and 15, the switch main body 10 of the push button switch 100 includes a housing 18 and a central fixed contact 20 which is suspended in the housing 18. The pair of side fixed contacts 21 and 21 disposed at both ends and one common fixed contact 22 facing the center fixed contact 20 and the side fixed contacts 21 and 21 are provided.

The housing 18 is made of an insulating molding material made of a synthetic resin material such as polybutylene terephthalate (PBT) or polyphenylene sulfide (PPS), and is molded in a substantially box shape, and surrounds all sides. 12 and the bottom wall 17, the opening part is formed in the upper side of the side wall 12. As shown in FIG. In addition, on the inner wall of the side wall 12, a first guide recess 13 having a deep dimension and a second guide recess 14 having a shallow depth dimension are formed symmetrically with respect to the central portion of the housing 18. In addition, the side wall 12 has a rectangular cutout 15 and a convex portion 16 protruding outward from the side wall 12 to the center of the housing 18.

The central fixed contact 20 is made of a metal material such as phosphor bronze or brass, and is cut and pushed, and has a central terminal 20a, and the central terminal 20a is the central fixed contact 20. It extends outward from (). This center fixed contact 20 is insert-molded in the bottom wall 17 of the housing 18, and the surface of the center fixed contact 20 is arrange | positioned on the bottom wall 17 upper surface. Moreover, the center terminal 20a of the center stationary contact 20 is insert-molded by the housing 18, The one part is arrange | positioned protruding outward from the side wall 12. As shown in FIG.

The side fixed contact 21 is made of a metal material such as phosphor bronze or brass, and is cut and pushed, and has a side terminal 21a, and the side terminal 21a has one side fixed contact. It extends outward from 21 and is arrange | positioned. The pair of side fixed contacts 21, 21 are connected by a connecting portion 21b, and are insert-molded on the bottom wall 17 of the housing 18, and the side fixed contacts 21, 21 and The surface of the connection part 21b is arrange | positioned in the state exposed to the bottom wall 17. As shown in FIG. Moreover, the lateral terminal 21a of the lateral fixed contact 21 is insert-molded by the housing 18, The one part is arrange | positioned protruding outward from the side wall 12. As shown in FIG. At this time, the side terminals 21a are arranged in parallel with the center terminal 20a.

The common fixed contact 22 is made of a metal material such as phosphor bronze or brass, and is cut and bent, for example, a pair of bent portions 22b bent in one common terminal 22a and a small U-shape. ), And only one common fixed contact 22 is formed. Moreover, one common terminal 22a extends outward from one common fixed contact 22, and is arrange | positioned. Moreover, the side edge part of the common fixed contact 22 is insert-molded at the interruption part of one side wall 12 of the housing 18, and this common fixed contact 22 is removed from the bottom wall 17 of the housing 18. As shown in FIG. It is arrange | positioned in the state exposed to the predetermined height dimension part.

In this state, the center terminal 20a, the side terminals 21a, and the common terminal 22a are arranged on the same plane, and the bottom surfaces of the terminals 20a, 21a, 22a and the bottom wall 17 are also arranged. Has a step of a predetermined dimension. Then, the U-shaped bent portion 22b of the common fixed contact 22 is formed so as to arrange the common terminal 22a on the same plane as the central terminal 20a and the lateral terminal 21a.

Moreover, the common terminal 22a is insert-molded by the housing 18, The one part is arrange | positioned protruding outward from the side wall 12. As shown in FIG. At this time, the common terminal 22a protrudes outward from the side wall 12 which opposes the side wall 12 from which the center terminal 20a and the side terminal 21a protrude.

And in this state, the common fixed contact 22 is parallel to the line (line) which connects the said center fixed contact 20 and the said side fixed contact 21, and is arrange | positioned in the upward direction with respect to this line. .

As shown in Fig. 16, the center fixed contact 20, the side fixed contact 21 and the common fixed contact 22 each have a center terminal 20a and a side terminal 21a in the manufacturing process. ) And the common terminal 22a are arranged in a connected state by the lead frame 102. Connection by this lead frame 102 is performed by the connection part, and each terminal 20a, 21a, 22a is arrange | positioned on the same plane.

As shown in FIG. 14, the movable contact 40 is made of a metal plate material having elasticity, such as phosphor bronze, for example, and is cut and pushed, and has a circular inverted dome portion 41 and a reverse dome portion 41. Protruding outward from the outer peripheral edge of the click dome portion 42, the pair of connecting portions 43 connecting the inverted dome portion 41 and the click dome portion 42, and the outer peripheral edge of the click dome portion 42. It has a pair of tip part 44. As shown in FIG.

The movable contact 40 has a pair of distal end portions 44 placed on the bottom surface of the first guide recess 13 of the housing 18, while the inverted dome portion 41 has a central fixed contact 20. It is arrange | positioned in the housing 18 at predetermined intervals with the side wall 12 so that the lateral fixed contact 21 may be covered. In this state, the click dome portion 42 of the movable contact 40 is in contact with the common fixed contact 22. That is, one end of the movable contact 40 is connected (contacted) with the common fixed contact 22 made of a metal plate material, and the other end of the movable contact 40 is an end of the housing 18 made of an insulating molding material. In contact with 23, the movable contacts 40 are thus arranged substantially parallel to the bottom wall 17 of the housing 18.

The push button 70 is made of, for example, an insulating material such as a synthetic resin material, and is molded and formed into a pair of guide convex portions that oppose the outer disk portion of the press portion 71 and the press portion 71 in a substantially disc shape. 72, a pair of guide legs 73 extending in a direction orthogonal to the guide convex portion 72 (lower direction in FIG. 14), and a pair of guide legs extended outward from the guide legs 73 It has the protrusion part 74, and the buffer member 80 integrally formed in the lower surface side of the press part 71 and the guide convex part 72 at intervals.

In addition, the shock absorbing member 80 has a flat elastic beam 82 and a pair of leg portions 81 that support the elastic beam 82.

This push button 70 is located on the upper surface side of the movable contact 40 and is arranged to close the opening of the housing 18.

In this state, the guide convex portion 72 of the push button 70 is accommodated in the first guide concave portion 13 and the second guide concave portion 14 of the housing 18, and also the guide leg portion 73. ) Is housed in the cutout 15 of the housing 18. Then, the pair of projections 74 of the push button 70 is caught by the convex portion 16 of the housing 18, and the push button 70 and the housing 18 are in a state of receiving the movable contact 40. It is integrated.

Next, the operation of this conventional push button switch will be described.

First, the push button 70 pressing part 71 of this push button switch is pressed (for example, in the direction of arrow B: Fig. 14) by a pressing part (not shown). By pressurizing the pressing section 71 by this pressing section (not shown), the elastic beam 82 of the push button 70 is pressed in the downward direction (arrow B direction), and by the elastic beam 82 The reverse dome portion 41 of the movable contact 40 is pressed in the downward direction (arrow B direction) so that the outer circumferential portion of the reverse dome portion 41 comes into contact with the side fixed contact point 21. By this contact, the lateral fixed contact 21 (side terminal 21a) and the common fixed contact 22 (common terminal 22a) are turned on (on) via the movable contact 40, thereby turning on 1 The stage switch mechanism is connected.

Next, when the pressing portion (not shown) is pressurized again in the direction of arrow B, the pressing dome portion 41 of the movable contact 40 is reversed by this pressing force by this pressing. And by the inversion of this inversion dome part 41, the center part of the inversion dome part 41 contacts the center stationary contact 20. As shown in FIG. By this contact, the center stationary contact 20, the movable contact 40, and the common stationary contact 22 are connected / conducted (on), and the second stage switch mechanism is connected to this on. That is, in this state, the center fixed contact 20 (center terminal 20a), the side fixed contact 21 (side terminal 21a), and the common fixed contact 22 (common terminal 22a) are together. It is connected and connected (turned on) via the movable contactor 40.

Next, when the pressurization to the pressing portion is released, the second stage switch mechanism comprising the central fixed contact 20 and the movable contactor 40 is first performed in the reverse order to the operation described above by the elastic repulsive force of the movable contactor 40. Is separated and turned off, and then the first stage switch mechanism composed of the movable contact 40 and the common fixed contact 22 is separated and turned off to return to the initial state.

Next, the manufacturing process of the switch main body of the conventional pushbutton switch is demonstrated here.

FIG. 16 is a plan view for explaining a manufacturing process of each stationary contact of a conventional push button switch, and FIG. 17 is a plan view for explaining a manufacturing process of a switch body of a conventional push button switch.

First, as shown in FIG. 16, one said central fixed contact 20, two said side fixed contact 21, and one said common fixed contact 22 are the 1st manufacturing processes, The center terminal 20a, the side terminal 21a, and the common terminal 22a are cut and bent in the state connected by the lead frame 102, respectively, and are formed. Connection by this lead frame 102 is performed by each connection part, and each terminal 20a, 21a, 22a is arrange | positioned on the same plane.

Next, as shown in FIG. 17, the insert 18 is formed on the central fixed contact 20, the side fixed contact 21, and the common fixed contact 22 connected to the lead frame 102 by the insert molding process. ), And each of the fixed contacts 20, 21, 22 and the housing 18 are integrated to manufacture a switch body 10.

Next, although not shown, the predetermined part of the connection part with each terminal 20a, 21a, 22a of the lead frame 102 with which the switch main body 10 was connected is cut-processed, and this lead process is carried out by this cutting process. And the switch body 10 are separated.

Thereby, the single piece of switch main body 10 can be manufactured.

However, in the conventional push button switch, the movable contact 40 and one common fixed contact 22 are connected only on one side of the movable contact, and the movable contact 40 is inverted of the movable contact 40 in the housing 18. Since it is arrange | positioned in the state with predetermined space | interval with the side wall 12 so that operation can operate reliably, when this pushbutton switch is operated, when the pressing force from oblique direction is applied to the pushbutton 70, this oblique direction is carried out. Due to the pressing force of the movable contact 40, the movable contact 40 may move in the transverse direction (the direction orthogonal to the side wall 12) within the housing 18, thereby deviating from the common fixed contact 22, and thus the movable contact 40. ) And the common fixed contact 22 become unstable.

In addition, in the conventional push button switch, one side (one side) of the click dome portion 42 of the movable contact 40 made of the metal plate material is in contact with the common fixed contact 22 made of the metal plate material, and the click dome portion 42 The other side of is in contact with the end 23 of the housing 18 made of an insulating molding material. In this regard, when the movable contactor 40 repeatedly performs the reverse operation by pressing the push button 70, the end 23 of the housing 18, which the movable contactor 40 is in contact with, moves the movable contactor 40. The cutting powder of the end 23 of the housing 18 is scattered on the center fixed contact 20 and the lateral fixed contact 21, and the contact of the push button switch is cut by the cutting powder. There is a problem of instability.

In addition, the conventional push button switch has a standing portion of the common terminal 22a at the common fixed contact 22 in order to arrange the common terminal 22a on the same plane as the central terminal 20a and the lateral terminal 21a. The bent portion 22b has a configuration in which a cross section is bent into a small U-shape. From this point of view, when forming the standing portion and the bent portion 22b of the common terminal 22a, it is a small U-shaped and complicated bending process, and it is difficult to realize a predetermined dimension with high accuracy.

The push button switch of the present invention and its manufacturing method solve the above-mentioned problems, and its object is to provide a stable push button switch and a simple combination of the push contacts and the movable contacts in the pressing operation of the push button switch. It is to provide a manufacturing method.

1 is a plan view showing an embodiment of a push button switch of the present invention.

2 is a side view showing an embodiment of a push button switch of the present invention.

It is a top view which shows embodiment of the switch main body of the push button switch of this invention.

4 is a plan view showing an embodiment of a movable contact of the push button switch of the present invention.

5 is a side view of the movable contact of FIG. 4.

It is a top view which shows embodiment of the flexible sheet | seat of the pushbutton switch of this invention.

7 is a side view of the flexible sheet of FIG. 6.

8 is a plan view showing an embodiment of a cover of a push button switch of the present invention.

9 is a side view of the cover of FIG. 8.

10 is a plan view for explaining a manufacturing process of each fixed contact of the push button switch of the present invention.

11 is a side view of FIG. 10.

It is a top view for demonstrating the manufacturing process of the switch main body of the pushbutton switch of this invention.

FIG. 13 is a cross-sectional view of FIG. 12.

14 is an exploded perspective view showing a conventional push button switch.

Fig. 15 is a plan view showing a switch body of a conventional push button switch.

16 is a plan view for explaining a manufacturing process of each of the fixed contact of the conventional push button switch.

It is a top view for demonstrating the manufacturing process of the switch main body of the conventional pushbutton switch.

* Description of the symbols for the main parts of the drawings *

1 housing 1a side wall

1c bottom wall 1d inner bottom

2 center fixed contact 2a

2b center terminal 3 side fixed contacts

3a contacts 3b side terminals

3c connection 4 Common fixed contact

4a contact 4b bend

4c Common terminal 5 Movable contact

5a movable reverse part 5b holding part

7 Cover 7b Bracket

50 contact member 50c bend

The push button switch of the present invention comprises a housing having an inner bottom, a plurality of terminals whose portions protrude outwardly from the housing, a central fixed contact connected to the terminal and disposed on the inner bottom of the housing, and the center fixing. A side fixed contact disposed on each side of one side of the contact, a common fixed contact, a center fixed contact and a side fixed contact, and a movable contact mounted on the common fixed contact and mounted on the common fixed contact. The pair is arranged so as to be always connectable so as to face the opposite sides of the center fixed contact.

In addition, the push button switch of the present invention has a stage formed differently from the center fixed contact, the side fixed contact, and the common fixed contact, and a plurality of terminals protruding from the housing protrude differently from the side wall of the housing, and protrude. The ends of the terminated terminals are bent at the terminals so that they are flush with each other.

Moreover, the manufacturing method of the pushbutton switch of this invention is a hoop-type metal material, the center fixed contact, the side fixed contact arrange | positioned at the both sides of one of the said center fixed contact, respectively, and the other of the said center fixed contact A pair of common fixed contacts disposed on both sides, a bent portion for forming the central fixed contact, the side fixed contact, and the common fixed contact differently from each other, the central fixed contact, the side fixed contact, and the Forming a contact member comprising a connection part of a common fixed contact; forming a housing in which the central fixed contact, the side fixed contact, and the common fixed contact are integrated by insert molding; and protruding out of the housing. It has a process of cutting the said bent part and the said connection part, and forming a terminal.

Embodiment

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of the pushbutton switch of this invention is described based on drawing.

1 is a plan view showing an embodiment of a push button switch of the present invention, Figure 2 is a side view showing an embodiment of a push button switch of the present invention, Figure 3 is a plan view showing an embodiment of a switch body of a push button switch of the present invention 4 is a plan view showing an embodiment of a movable contact of a push button switch of the present invention, FIG. 5 is a side view of the movable contact of FIG. 4, and FIG. 6 is a plan view showing an embodiment of a flexible sheet of a push button switch of the present invention. FIG. 7 is a side view of the flexible sheet of FIG. 6, FIG. 8 is a plan view showing an embodiment of a cover of the push button switch of the present invention, and FIG. 9 is a side view of the cover of FIG. 8.

As shown in Figs. 1 to 3, the housing 1 is made of a synthetic resin material such as polybutylene terephthalate (PBT) or polyphenylene sulfide (PPS), and is molded and molded into a substantially rectangular shape. It has a box shape, and has side walls 1a and 1b and bottom walls 1c that surround all sides. Moreover, the bottom wall 1c has a substantially circular inner bottom face 1d.

In addition, one side wall 1b is provided with a plurality of convex portions 1e protruding outward from the side wall 1b.

The central fixed contact 2 is made of a metal plate material such as phosphor bronze or brass, and is cut and pushed to form a substantially circular shape. Paired contact portions 2a and 2a are formed. Further, the central fixed contact 2 is formed so that the central terminal 2b formed integrally with the central fixed contact 2 respectively protrudes outward. In addition, the center stationary contact 2 and the center terminal 2b are comprised with a slight step | step.

The center fixed contact point 2 is arranged with its surface exposed to the inner bottom face 1d of the housing 1, and the center terminals 2b and 2b protrude outwards from the opposing side walls 1a, respectively. It is arranged. One of the central terminals 2b is bent into an approximately L shape by bending (forming), and the leading end of the central terminal 2b is flush with the outer bottom surface of the bottom wall 1c of the housing 1. It is arrange | positioned so that it may become (parallel).

The lateral fixed contact 3 is made of a metal plate material such as phosphor bronze or brass, for example, and is cut and pushed to form a substantially rectangular shape, and a plurality of (for example, two) are formed. (3) has a contact portion 3a which is pushed into a substantially rectangular shape at the center portion and a side terminal 3b connected to the side fixed contact 3. This side terminal 3b is formed so that it may protrude from the one end of the side fixed contact 3 to the outer side of the side fixed contact 3. Moreover, the two side fixed contact points 3 are connected by the connection part 3c. Moreover, the side fixed contact 3 and the side terminal 3b are comprised with a slight step | step.

These lateral fixed contacts 3 are arranged on both sides of the center fixed contact 2, and are disposed in the state where the surface is exposed on the inner bottom face 1d of the housing 1, similarly to the central fixed contact 2. The side terminals 3b are arranged so as to protrude outwards from the side walls 1a opposite the front ends thereof. Moreover, the lateral terminal 3b is arrange | positioned by insert molding in the bottom wall 1c of the housing | casing 1, The one end part is bent in substantially L shape by bending process (forming process), and the bottom of the housing 1 is carried out. It is arrange | positioned so that it may become coplanar (parallel) with the outer bottom face of the wall 1c. That is, the center fixed contact 2 is arrange | positioned in the state sandwiched between by the pair of side fixed contact 3.

The common fixed contact 4 is made of a metal plate material such as phosphor bronze or brass, and is cut and pushed, and has a substantially rectangular shape so as to be orthogonal from the contact portion 4a and the contact portion 4a ( It has the bent part 4b bent by L shape. Further, the common fixed contact 4 is formed so that the common terminal 4c formed integrally with the common fixed contact 4 respectively protrudes outward. And the common fixed contact 4 is arrange | positioned facing two (one pair), and this arrangement is a state which sandwiched the center fixed contact 2 and the side fixed contact 3 between them. Further, although the common terminals 4c and 4c of the pair of common fixed contacts 4 and 4 are not shown, for example, each common terminal 4c on each wiring pattern of a printed wiring board (not shown) is shown. , 4c) are interconnected by the respective wiring patterns when arranged and connected.

Moreover, this common fixed contact 4 is insert-molded in the housing 1 so that the common terminals 4c and 4c may protrude to both sides outward from the opposing side wall 1a of the housing 1, and the contact part 4a A part and the bent part 4b are arrange | positioned in the state exposed from the inner bottom face 1d in the housing 1. The tip ends of the common terminals 4c and 4c are bent in a substantially L shape by bending (forming), and are arranged to be coplanar (parallel) with the outer bottom of the bottom wall 1c of the housing 1. have. That is, the distal ends of the center terminal 2b, the side terminal 3b, and the common terminal 4c are arranged to be coplanar (parallel).

In this state, the center terminal 2b and the side terminals 3b are arranged in parallel in the same plane, and the center terminal 2b and the side terminals 3b and the common terminals 4c and 4c are common. The terminals 4c and 4c are arranged so as to form a plane on the upper surface side with respect to the center terminal 2b and the lateral terminal 3b, that is, the stages are different planes and are arranged in parallel.

And in this state, the switch main body which consists of the housing 1 and each fixed contact 2, 3, 4 is formed.

As shown in FIG. 4, FIG. 5, the movable contact 5 consists of metal plate materials which have elasticity, such as a phosphor bronze material, for example, is cut and extruded, and is substantially disk-shaped, and the dome shape of a center part is movable. It has the inversion part 5a and the annular holding part 5b formed around the outer side of the movable inversion part 5a. Moreover, the pair of convex parts 5c and 5c which protrude outward from the holding | maintenance part 5b is formed in the opposing position of the holding | maintenance part 5b, and the movable inversion part 5a and the holding part 5b are It is connected by opposingly arranged connection parts 5d and 5d. Moreover, the holding | maintenance part 5b is formed in substantially square shape (mountain shape) as shown in FIG.

The movable contact 5 is disposed in the housing 1 at a predetermined distance from the side walls 1a and 1b for the inverting operation of the movable contact 5 in the housing 1 so as to cover the housing 1. In this state, the circular holder 5b of the movable contact 5 is always connected to a pair of common fixed contacts 4. That is, the movable contact 5 is always connected at the mutually arranged common fixed contact 4 and two places (both sides of the movable contact 5), respectively.

6 and 7, the flexible sheet 6 is made of an insulating material having flexibility, such as a synthetic rubber material, for example, and is formed in a flat plate shape in a rectangular shape. This flexible sheet 6 is disposed on the upper surface of the movable contact 5 to cover the movable contact 5, and is disposed on the upper surface of the housing 1 to cover the box-shaped housing 1.

As shown in Figs. 8 and 9, the cover 7 is made of, for example, a flat metal material such as iron (Fe) material or an iron alloy material, and is cut and bent, and has an approximately rectangular upper wall. 7a and a plurality of (for example, four) bracket portions 7b bent downward from opposing opposite ends of the upper wall 7a. Moreover, the circular hole 7c is formed in the center part in the upper wall 7a, and the hole 7d is formed in the substantially center part in each bracket part 7b.

The cover 7 is arranged to cover the housing 1 while the flexible sheet 6 abuts on the rear surface of the upper wall 7a, and at the same time, the hole 7d of each bracket portion 7b has a housing ( It hangs on each convex part 1e of 1), respectively.

Thereby, the push button switch of this invention is integrated.

Next, the manufacturing process of the push button switch main body of this invention is demonstrated here.

10 is a plan view for explaining the manufacturing process of each of the fixed contact of the push button switch of the present invention, Figure 11 is a side view of Figure 10, Figure 12 is a plan view for explaining the manufacturing process of the switch body of the push button switch of the present invention 13 is a cross-sectional view of FIG. 12. Here, when demonstrating each manufacturing process of the switch main body of the pushbutton switch of this invention, the same code | symbol is attached | subjected about the same structure.

First, as shown in Figs. 10 and 11, in the manufacturing process of each fixed contact, for example, a flat (hoop type) metal material such as phosphor bronze or brass is cut, pushed, and bent, thereby contacting. The member 50 is formed. In this contact member 50, the center fixed contact 2, a pair of the side fixed contacts 3 and 3, and a pair of the common fixed contacts 4 and 4 are formed at the same time.

In addition, the contact member 50 is provided with a plurality of (e.g. two) substantially rectangular holding portions 50a, and a circular feed hole 50b formed at the center of the holding portion 50a. Each holding terminal 50a has a central terminal 2b of the center fixed contact 2, a side terminal 3b of a side fixed contact 3, and a common terminal 4c of a common fixed contact 4, respectively. ) Are connected to each other. That is, the site | part to which these each terminal 2b, 3b, 4c is connected comprises the connection part of each stationary contact 2, 3, 4, respectively.

At this time, the central terminal 2b and the lateral terminal 3b are formed so as to constitute the same plane as the holding portion 50a, and the common terminal 4c has a different stage from the holding portion 50a (for example, The common terminal 4c constitutes a plane of the upper side of the holding portion 50a.

In addition, the central fixed contact 2 is formed so that the central terminal 2b formed integrally with the central fixed contact 2 respectively protrudes outward, and the pair of side fixed contacts 3, 3 are provided with side fixed contacts. A pair of side terminals 3b, 3b connected to one end of the third end (3, 3) (top end in Fig. 10) is formed to protrude outward, and a pair of common fixing contacts 4, 4 is fixed to the common. A pair of common terminals 4c and 4c respectively connected to both ends (left and right ends in Fig. 10) of the contacts 4 and 4 are formed to protrude outward.

And what constitutes each plane in which this stage differs, The connection of the holding part 50a of the contact member 50 and each common terminal 4c of the common fixed contact 4 is the vicinity of the holding part 50a. This is because the stage difference is formed by the formed substantially L-shaped bent portion 50c. That is, this bent part 50c is formed so that it may be arrange | positioned at the outer side of the housing | casing 1 as a front end part of each common terminal 4c. This substantially L-shaped bent portion 50c is bent in the same direction as the L-shaped bent portion 4b of the common fixed contact 4 and is formed at a position separated from each other, whereby the height dimension of which the stage is different is different. It is possible to set easily without applying excessive stress to the metal material of the mold.

Next, as shown in FIG. 12, FIG. 13, in the manufacturing process of a switch main body, the insert is inserted into each fixed contact 2, 3, 4 of the said contact member 50, and each terminal 2b, 3b, 4c. By molding, the housing 1 is molded (molded), and the housing 1 and the contact member 50 are integrated to form a semifinished product.

Next, although not shown, each terminal protrudes outwardly from the opposite side wall 1a, 1a of the housing 1 of the semifinished product which consists of this integrated housing 1 and the contact member 50, respectively. Predetermined portions of (2b, 3b, 4c) are bent and cut by cutting. Holding | maintenance part 50a is isolate | separated from the switch main body by cutting | disconnection of each terminal 2b, 3b, 4c and holding part 50a. For this separation, a switch body consisting of the housing 1 and the fixed contacts 2, 3, 4 is formed by a cutting process. Moreover, each tip part of each terminal 2b, 3b, 4c in which a stage protrudes outward from the side wall 1a, 1a differently is formed so that it may become coplanar by forming process.

The switch body thus formed is next arranged such that the movable contact 5, the flexible seat 6, and the cover 7 cover the housing 1 of the switch body in turn, and the cover 7 is placed on the housing 1. The walk push button switch is integrated.

Next, the operation of the push button switch of the present invention will be described.

First, the flexible sheet 6 whose upper surface is exposed from the circular hole 7c formed in the cover 7 of this push button switch is pressurized by a pressing part (not shown), for example (in the arrow B direction). : See FIG. 2). By the pressurization of the flexible sheet 6 by this pressing part (not shown), the movable reversing part 5a of the movable contact 5 is pressed downward (arrow B direction: see FIG. 2), and a movable reversing part The outer peripheral part of 5a is connected with the contact part 3a of the side fixed contact 3. By this connection, the lateral fixed contact 3 and the common fixed contact 4 are turned on (on) via the movable contact 5, and the first stage switch mechanism is connected to this on.

Next, when the pressing portion (not shown) is further pressed in the direction of the arrow B (see Fig. 2), the domed movable inverting portion 5a is inverted by this pressing force by this pressing. By the inversion of the movable inversion part 5a, the center part of the movable inversion part 5a connects with the contact parts 2a and 2a of the center fixed contact 2. As shown in FIG. By this connection, the center stationary contact 2, the movable contact 5, and the common stationary contact 4 are connected and conducting (on), and the second stage switch mechanism is connected to this on. That is, in this state, the center stationary contact 2, the side stationary contact 3, and the common stationary contact 4 are connected and connected (on) together via the movable contact 5 together.

Next, when the pressurization to the pressing portion is released, the switch of the second stage consisting of the central fixed contact 2 and the movable contact 5 is first performed in the reverse order to the operation described above by the elastic repulsive force of the movable contact 5. The mechanism is spaced apart and turned off, and then the first stage switch composed of the lateral fixed contact 3 and the movable contact 5 is separated and turned off to return to the original original state.

In the push button switch of the present invention, since the movable contact is placed on and in contact with a pair of two common fixed contacts, when the movable contact is pressurized, a diagonal pressure is applied to the movable contact to the pressing force in the diagonal direction. As a result, even if the movable contact moves in the horizontal direction, at least one of the movable contacts does not deviate together from the pair of common fixed contacts. For this reason, there exists an effect that it is possible to perform stable contact disconnection operation (switch operation) of a pushbutton switch.

In addition, the push button switch of the present invention is mounted with the movable contacts in contact with a pair of common fixed contacts, and the movable contacts are not in contact with the housing. Therefore, there is no generation of cutting powder in the housing. In this regard, the contact of the push button switch is stabilized.

In addition, the push button switch of the present invention is formed so that the terminal protrudes differently from the side wall of the housing, but the front end portion of the protruding terminal is bent into the terminal so as to be flush with the outer bottom surface of the bottom wall of the housing. Even when the push button switch is soldered to the holding plate (for example, a printed wiring board), since each terminal (tip) is placed on the holding plate so as to be flat, stable attachment is possible.

In addition, the method of manufacturing a push button switch of the present invention comprises the steps of forming a contact member, forming a housing in which each fixed contact is integrated by insert molding processing, and cutting a bent portion and a connecting portion to form a terminal. Since the bending of each terminal inside the housing can be minimized, excessive stress between the common terminal and the common fixed contact due to the bending of the terminal does not occur, so that the common terminal and the common fixed contact are not generated. Can process high precision.

Claims (3)

A housing having an inner bottom, A plurality of terminals whose portions protrude outward from the housing, A central fixed contact connected to said terminal and disposed on said inner bottom of said housing; Side fixed contacts disposed on both sides of one of the center fixed contacts, and Common fixed contact, and A movable contact mounted on the center fixed contact and the lateral fixed contact and connected to the common fixed contact; And a pair of the common fixed contact points disposed opposite to both sides of the other center fixed contact so as to be always connected to the movable contact. The method of claim 1, wherein the central fixed contact, the side fixed contact and the common fixed contact have different stages, and the plurality of terminals protruding from the housing protrude differently from sidewalls of the housing, A push button switch, wherein the terminal is bent so that the leading end of the terminal is flush. A pair of common fixed contacts disposed in the hoop-type metal material, the center fixed contact, the lateral fixed contacts disposed on both sides of one of the center fixed contacts, and the opposite sides of the other of the central fixed contact, respectively. And a bent portion for forming the center fixed contact and the side fixed contact and the common fixed contact differently from each other, and a contact member including the center fixed contact and the connection part between the side fixed contact and the common fixed contact. Fair, Forming a housing in which the center fixed contact, the side fixed contact and the common fixed contact are integrated by insert molding processing; And a step of forming a terminal by cutting the bent portion and the connecting portion protruding from the outside of the housing.