JPH11265634A - Push-on switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a structure, reduce the number of constituting parts, and reduce costs in an inexpensive push-on switch provided with a plurality of circuits. SOLUTION: A membrane switch 18 is provided with two pairs of circuits comprising two sets of comb-teeth-shaped fixed contacts 12A, 12B, and 12C, 12D on a fixed board 13, and two movable contacts 16A, 16B for a short circuit disposed on a lower surface of a movable board 15. The membrane switch 18 is fixed on an inner bottom surface of a switch case 11 with insertion molding. A push-pressing body 17 made of rigid body material, having such a size that all of the two movable contacts 16A, 16B of its side are covered, is fixed on the upper surface of the movable board 15. When a protrubernat part 19D for push-pressing in a spring body 19 formed in a dome shape is push-pressed, a push-on which provided with a plurality of circuits is provided with a simple structure, and in low costs by simultaneously connecting two sets of contacts to each other in the membrane switch 18 through the push-pressing body 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to telephones,
The present invention relates to a push-on switch having a plurality of independent circuits used for input buttons of various electronic devices such as a fax machine.

[0002]

2. Description of the Related Art As a conventional push-on switch of this kind, there is known a push-on switch described in Japanese Utility Model Laid-Open Publication No. 60-112029, "Independent Two-Circuit Push Button Switch".

As shown in a front sectional view of FIG. 17 and an exploded perspective view of FIG. 18, a schematic structure of the push button 3 held by a cover plate 2 on an upper part of a case 1 made of insulating resin and having an open upper surface is shown. A dome-shaped leaf spring 5, a flexible insulating plate 6, and a first affixed to the lower surface thereof are provided between two pairs of fixed contacts 4A, 4B and 4C, 4D provided on the bottom 1A of the case 1 with a difference in height. The second movable contacts 7A and 7B are arranged in order from the push button 3 side, and the push button 3 is pressed and displaced toward the bottom 1A side, and the leaf spring 5 is pressed and deformed by the push button 3 toward the bottom 1A side. The leaf spring 5
The insulating plate 6 is elastically deformed toward the bottom 1A by the pressing protrusions 5A and 5B on the lower surface, and the first and second movable contacts 7 on the lower surface of the insulating substrate 6 are formed.
A and 7B make contact between the two sets of fixed contacts 4A and 4B and 4C and 4D almost simultaneously at the same time.

[0004]

However, in the above-mentioned conventional push-on switch, it is necessary to attach two movable contacts to the lower surface of a flexible insulating substrate with a complicated contact portion and a large number of components. For example, there is a problem that the cost is high due to the large number of assembly steps, and the switch has a large outer diameter.

The present invention solves such a conventional problem, and is inexpensive because it has a simple structure, has few components, and does not require assembling man-hours.
It is an object to provide a push-on switch capable of operating a plurality of circuits simultaneously.

[0006]

In order to solve the above-mentioned problems, a push-on switch according to the present invention is provided with a membrane switch having a plurality of sets of contacts on an inner bottom surface of a switch case and a movable board of a membrane switch. A rigid pressing member is fixed to the back surface of the contact so as to cover the entire movable contact, and when pressing the operation portion of the switch, a plurality of sets of contacts of the membrane switch are simultaneously operated via the pressing member. .

Accordingly, a push-on switch which is inexpensive since it has a simple structure, has few components, and does not require assembling man-hours, has a small outer diameter, and can operate a plurality of circuits almost simultaneously can be realized. .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to a first aspect of the present invention is directed to a fixed substrate having a plurality of fixed contacts on an upper surface, facing a fixed substrate above a fixed substrate at a predetermined interval, and connecting each fixed contact to a lower surface. A membrane switch composed of a flexible movable substrate having a plurality of corresponding movable contacts, a switch case made of an insulating resin in a box shape having an open top surface in which a membrane switch is arranged on an inner bottom surface, and a movable membrane switch. A rigid pressing body fixed to the back surface of the movable contact on the substrate so as to cover the entire movable contact, and a thick outer peripheral lower surface rests on the outer peripheral portion of the membrane switch along the inner peripheral wall of the switch case, and the thinner A dome-shaped spring body made of an elastic insulating material in which a lower surface of a thick central top portion connected by a conical portion is located above the pressing body, and an upper portion of the central top portion is a pressing projection; ,Switch case While closing the opening, the outer peripheral lower surface is fixed to the outer peripheral upper part of the switch case so as to press the outer peripheral part upper surface of the dome-shaped spring body. A push-on switch comprising a cover having a vertically penetrating hole, and a plurality of contacts of a membrane switch via a rigid pressing member configured to cover the entire movable contact when the switch is pressed. To work,
Since the structure is simple, the number of components is small, and the number of assembling steps is small, the push-on switch having a plurality of circuits which is inexpensive and has small external dimensions can be realized.

According to a second aspect of the present invention, in the first aspect of the present invention, the cover is formed in a cap shape having a through hole at the center of the upper surface with the lower surface open, and the outer periphery can be moved up and down on the inner periphery of the peripheral wall of the cover. A push button made of a rigid material which is held and whose upper central projection projects upward from the through hole of the cover is mounted on the upper surface of the central top of the dome-shaped spring body in the switch case. In addition to the same effects as those of the invention described in 1, the dome-shaped spring body is compressed without tilting by pushing the center top of the dome-shaped spring body via a push button that moves up and down while being guided by the cover. It can be deformed and has the effect that a plurality of switch circuits can be operated almost simultaneously.

According to a third aspect of the present invention, in the second aspect of the present invention, the upper surface of the center top of the dome-shaped spring body and the lower surface of the push button are provided on one surface, and the convex portion provided on one surface is provided on the other surface. And in contact with the recess provided on the lower surface of the push button when the switch is operated by pushing the push button in addition to the same operation as the invention according to claim 2. Since the upper surface of the central top of the dome-shaped spring body is not displaced, the dome-shaped spring body is reliably compressed and deformed to press the center of the pressing body of the movable substrate of the membrane switch. Can be operated more accurately and simultaneously stably.

According to a fourth aspect of the present invention, in the first aspect of the present invention, there are provided a plurality of sets of fixed contacts and connection terminals electrically connected to each of the fixed contacts. A fixed board made of an insulating material insert-molded and fixed to the bottom of the switch case so that the contacts are exposed upward and the connection terminals are led out, and a short-circuit movable contact corresponding to the plurality of sets of fixed contacts. A flexible member which is provided on the lower surface and has a pressing body fixed to the upper surface thereof and is disposed on a step portion on the inner peripheral bottom surface of the peripheral wall of the switch case and arranged to face the fixed substrate at a predetermined interval. A membrane switch is composed of a movable substrate made of an insulating material, and only the fixed substrate of the membrane switch is insert-molded and fixed in a switch case to constitute the membrane switch when the push-on switch is assembled. Because the insert molding process has little effect on the contact points, the contact state after the insert molding process can be checked before assembling, and the contact gap as a membrane switch is also stable. Having.

According to a fifth aspect of the present invention, in the fourth aspect of the invention, the fixed substrate is formed of a hard insulating substrate. In addition to the same operation as the fourth aspect of the invention, There is an effect that the deformation of the fixed substrate due to heat or pressure during insert molding of the fixed substrate is small, and the characteristics of the membrane switch, that is, the characteristics of the push-on switch using the same are stable.

According to a sixth aspect of the present invention, in the first aspect of the present invention, a plurality of sets of fixed contacts and a connection terminal electrically connected to each of the fixed contacts are provided. The fixed substrate and a movable substrate for short-circuiting corresponding to the plurality of sets of fixed contacts are provided on the lower surface, and a movable substrate made of a flexible insulating material having a pressing body fixed to the upper surface thereof. A membrane switch formed in advance by joining via a spacer so that the contacts face each other at a predetermined interval is connected to the bottom of the switch case so that the movable substrate is exposed upward and the connection terminals are led out. Since it is a product that is insert-molded and fixed to the switch case, and a product that is formed in advance as a membrane switch is insert-molded and fixed to the switch case and assembled as a push-on switch, An effect that can be achieved with less push switch of man-hours.

According to a seventh aspect of the present invention, in accordance with the first aspect of the present invention, there is provided a hard insulating material having a plurality of fixed contacts and connection terminals electrically connected to the fixed contacts. A movable substrate made of a flexible insulating material, having a fixed substrate, movable contacts corresponding to the fixed contacts on the lower surface, connection terminals electrically connected to the movable contacts, and a pressing body fixed to the upper surface. Are connected via spacers so that the fixed contacts and the movable contacts face each other with a predetermined space therebetween, and the membrane switch formed in advance is moved upward so that the movable substrate is exposed upward and all connection terminals are removed. It is insert-molded and fixed to the bottom of the switch case so as to be drawn out, and in addition to the same operation as the invention according to claim 6,
7. The push-on switch according to claim 4, wherein the number of contacts provided on the fixed substrate and the movable substrate is the same, the number of contacts on the fixed substrate can be reduced, and the outer diameter of the fixed substrate can be reduced. This has the effect that the outer diameter of the push-on switch can be made smaller than that of the push-on switch.

According to an eighth aspect of the present invention, in the fourth or sixth aspect, the fixed contact of the fixed substrate is a combination of comb-shaped contacts facing each other, and the fixed contact of the switch. Since the number of contacts that make contact and short-circuit with the movable contact is large, the contact reliability is high.

According to a ninth aspect of the present invention, in the first aspect of the present invention, the fixed contact of the fixed substrate and the movable contact of the movable substrate are formed by printing conductive paint. Since the connection terminals are caulked, it is possible to provide a large number of low-current push switches in a simple process at low cost, and the connection terminals can be easily connected.

The invention according to claim 10 is the invention according to claims 2 to 8
In the invention according to any one of the above, the fixed contact of the fixed substrate and the movable contact of the movable substrate are formed by etching after bonding a metal foil, and the connection terminals are caulked, Although it is more expensive than the push-on switch according to the ninth aspect of the present invention, it has the effect of providing a push-on switch that can handle a large current.

According to the present invention, there is provided a fixed board made of a hard insulating material having a plurality of sets of fixed contacts and connection terminals electrically connected to the respective fixed contacts, and a short circuit corresponding to the plurality of sets of fixed contacts. A movable switch made of a flexible insulating material having a movable contact on its lower surface, a membrane switch in which a fixed contact and a short-circuit movable contact are joined in advance via a spacer so as to face each other at a predetermined interval, and a movable substrate; A switch case made of insulating resin in the form of a box with an open top that is insert-molded and fixed to the inner bottom surface, and the movable board of the membrane switch is exposed so that the connection terminals are exposed to the outside and the connection terminals are led out. A rigid pressing member fixed to the back surface of the contact so as to cover the entire movable contact, and an outer peripheral lower end resting on an outer peripheral portion of the membrane switch along an inner periphery of a peripheral wall of the switch case. A dome-shaped moderating plate made of an elastic metal sheet having a portion protruding upward, a cover having a through hole in the center fixed to the upper end of the outer periphery of the switch case so as to cover the opening of the switch case, and an outer periphery of the switch case. A push-on switch comprising a push button made of a rigid material placed on the upper surface of the moderating plate so that the protrusion at the center of the upper surface protrudes upward from the through hole of the cover and is held movably up and down on the inner periphery of the peripheral wall; Thus, in addition to the same effect as that of the invention described in claim 6, there is an effect that a push-on switch having a clear sense of moderation can be realized with a short stroke.

According to a twelfth aspect of the present invention, a fixed substrate made of a hard insulating material having a plurality of fixed contacts and connection terminals electrically connected to the respective fixed contacts, and a movable contact corresponding to each of the fixed contacts are provided on a lower surface. A movable substrate made of a flexible insulating material having a connection terminal electrically connected to each movable contact is previously bonded via a spacer so that each fixed contact and the movable contact face each other at a predetermined interval. And a switch case made of a box-shaped insulating resin with an open top, which is insert-molded and fixed to the inner bottom surface, so that the movable substrate is exposed upward and the connection terminals are led out. A rigid pressing body fixed to the back surface of the movable contact of the movable substrate of the membrane switch so as to cover the entire movable contact, and on the outer peripheral portion of the membrane switch along the inner periphery of the peripheral wall of the switch case. A dome-shaped moderating plate made of an elastic metal thin plate on which a lower peripheral edge is mounted and a central portion protrudes upward, and a cover fixed to the outer peripheral upper end of the switch case so as to cover the opening of the switch case and having a through hole in the center. , The outer circumference of which is vertically movably held by the inner circumference of the switch case,
8. The push-on switch according to claim 7, wherein the push-on switch comprises a push button made of a rigid material and is mounted on the upper surface of the moderating plate such that a projection at the center of the upper surface projects upward from the through hole of the cover. In addition to the same operation as described above, there is an operation that a push-on switch having a clear moderation feeling can be realized with a short stroke.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a front sectional view of a two-circuit push-on switch according to a first embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof. A switch case with an open top, with the bottom inside
As shown in the external perspective view of FIG. 1, two sets of comb-like fixed contacts 12A, 12B and 1
2C and 12D are printed and formed with conductive paint on the upper surface of the hard insulating substrate, and the connection terminals 14A and
The fixed substrate 13 to which the crimped connections 14B, 14C, and 14D are connected is insert-molded and fixed, and the connection terminals 14A, 14B, 14C, and 14D extending outward are formed into a predetermined shape, and the outer periphery of the upper surface thereof is formed. The movable substrate 1 made of a flexible insulating material is provided on the step 11B on the inner peripheral bottom surface of the peripheral wall 11A of the switch case 11.
5 is positioned and mounted on two inner corners 11C of the peripheral wall 11A of the switch case 11.

On the lower surface of the movable substrate 15, the two sets of comb-shaped fixed contacts 12A, 12B and 12C, 1
The movable contacts 16A and 16B for short-circuit corresponding to 2D (see the bottom view of the movable substrate in FIG. 4) are formed by printing with a conductive paint, and the comb-shaped fixed contacts 12A, 12B and 12C, 1 are formed.
A pressing body 17 made of a rigid material large enough to cover the entirety of the short-circuit movable contacts 16A and 16B is attached to the center of the upper surface which is the back surface of the fixed substrate. 13 and the movable substrate 15 constitute a membrane switch 18.

A dome-shaped spring body 19 made of an elastic insulating material is provided thereon, and the thick outer peripheral portion 19A of the membrane switch 18 extends along the inner periphery of the peripheral wall 11A of the switch case 11. The thin dome portion 1 is mounted on the outer peripheral portion of the movable substrate 15 and has a thin conical shape.
The lower surface of the thick central top portion 19C tied at 9B is the pressing body 17 of the movable substrate 15, that is, the short-circuit movable contact 16A.
And 16B are opposed to each other, and the upper portion thereof protrudes upward as a pressing projection 19D.

Further, reference numeral 20 denotes a cover arranged so as to close the opening on the upper surface of the switch case 11, and a peripheral wall 20 thereof is provided.
A so that the lower surface 20 </ b> B of A presses the upper surface of the outer peripheral portion of the dome-shaped spring body 19.
The dowel 11D on the upper surface of 1A is fixed by caulking, whereby the movable substrate 15 of the membrane switch 18 is stably held at a position facing the fixed substrate 13, and the dome-shaped spring Body 1
The pressing projection 19D on the upper part of the center top 19C of 9 is protruded upward through the center circular hole 20C so as to be able to move up and down.

The push-on switch according to the present embodiment is configured as described above, and the operation will be described next.

As shown in the front sectional view of the operating state of FIG. 5, when the electronic apparatus is mounted on the wiring board 21 of the operating apparatus, the operation button 22 of the operating apparatus is used to move upward from the center circular hole 20C of the cover 20. When the pressing projection 19D of the dome-shaped spring body 19 protruding downward is pressed downward, the thin-walled conical dome portion 19B of the spring body 19 is elastically deformed with a sense of moderation, and the lower surface of the central apex 19C is lowered. , The center of the movable substrate 15 of the membrane switch 18 is pressed via the pressing body 17 to bend downward, and the short-circuit movable contacts 16A and 16B on the lower surface thereof are opposed to the fixed substrate 13.
And the corresponding two sets of comb-shaped fixed contacts 12A,
12B and between 12C and 12D almost simultaneously, that is, two sets of connection terminals 14A and 14B and 14
C and 14D are connected almost simultaneously.

Thereafter, when the pressing force applied to the pressing projection 19D of the dome-shaped spring body 19 via the operation button 22 is removed, the push-on switch operates as a dome of the spring body 19 made of an elastic insulating material. The portion 19B returns to the original state of FIG. 1 by its elastic restoring force, and the movable substrate 15 of the membrane switch 18 made of the flexible insulating substrate also has its original central portion curved downward by the elastic restoring force. After returning to a flat plate shape, the two sets of comb-shaped fixed contacts 12A and 12
Between B and between 12C and 12D, that is, between the two sets of connection terminals 14A and 14B and between 14C and 14D, the state is again opened.

As is apparent from the above description, in the push-on switch according to the present embodiment, only the fixed substrate made of the hard insulating substrate of the membrane switch is insert-molded and fixed to the switch case, and the push-on switch is assembled. Sometimes, a membrane switch is configured, so that the insert molding process has little effect on the contact section and various characteristics are stable, and a rigid body that is configured to cover the entire movable contact when the switch is pressed The multiple contacts of the membrane switch are operated via the pressing body of the above, so it is inexpensive because it has a simple structure, few components, and it does not require assembling man-hours. In addition, it has a small external size and a two-circuit push for microcurrent with stable contact. It is possible to provide a large number of ON switches.

(Embodiment 2) FIG. 6 is a front sectional view of a two-circuit push-on switch according to a second embodiment of the present invention, and FIG. 7 is an exploded perspective view of the same.
The method for forming the membrane switch 24 disposed on the inner bottom surface of the switch case 23 is different from the method described above.

That is, as shown in an exploded perspective view of the membrane switch of FIG. 8, two sets of comb-like fixed contacts 12A, 12B and 12 which are combined so as to face each other.
C and 12D are printed on the upper surface of the hard insulating substrate with a conductive paint, and connection terminals 14A and 1D are attached to the ends of each fixed contact.
On the lower surface of the fixed substrate 13 to which 4B, 14C and 14D are caulked, two sets of comb-shaped fixed contacts 12A and 12
B and short-circuit movable contact 16 corresponding to 12C and 12D
A movable substrate 25 made of a flexible insulating material formed by printing A and 16B (see FIG. 4) with a conductive paint is fixed to the fixed contact 1
The movable contact 16A for short-circuit is fixed to the fixed contact 12 on 2A and 12B.
The membrane switch 24 is formed by adhesively bonding via a ring-shaped spacer 26 made of an insulating material so that the movable short-circuiting contacts 16B face the C and 12D at predetermined intervals.

The short-circuit movable contact 16 of the movable substrate 25
A pressing body 17 made of a rigid material large enough to cover the entire short-circuit movable contacts 16A and 16B is attached in advance to the center of the upper surface, which is the back side of A and 16B.

Thereafter, the membrane switch 24 formed in advance is fixed to the bottom surface of the switch case 23 by insert molding.

The configuration and operation of other parts of the two-circuit push-on switch according to the present embodiment are as follows.
The description is omitted because it is the same as that according to the first embodiment.

As described above, according to the present embodiment, a switch formed in advance as a membrane switch is insert-molded and fixed to a switch case and assembled as a push-on switch. It can be realized.

In the above description, two sets of comb-shaped fixed contacts 12 which are combined on a hard insulating substrate so as to face each other are used as contact substrates for the membrane switch.
A, 12B and 12C, 12D are printed with conductive paint, and connection terminals 14A, 14
Fixed substrate 13 in which B and 14C, 14D are caulked.
Then, a membrane switch 24 is formed by bonding a movable substrate 25 having short-circuited movable contacts 16A and 16B printed with conductive paint on the lower surface of a flexible insulating substrate via a ring-shaped spacer 26. As shown in the exploded perspective view of the membrane switch shown in FIG. 9, two fixed contacts 27A and 27B are formed by printing with a conductive paint on a hard substrate and connected to the end of each fixed contact. Two movable contacts 30A and 30B corresponding to the respective fixed contacts 27A and 27B are formed by printing with a conductive paint on a fixed substrate 29 to which the terminals 28A and 28B are caulked and connected. A movable substrate 32 made of a flexible insulating material in which terminals 31A and 31B are caulked and connected, a movable contact 30A is fixed to fixed contact 27A, and a movable contact 3 is fixed to fixed contact 27B.
The two sets of connection terminals 28 are also formed as a membrane switch 34 formed by bonding and bonding via a ring-shaped spacer 33 so that the two sets of connection terminals 28B are opposed to each other at a predetermined interval.
A push-on switch that can connect between A and 31A and between 28B and 31B almost simultaneously can be realized.

Thus, the above membrane switch 2
4, the number of fixed contacts provided on the fixed substrate 29 is reduced, so that the outer diameter of the fixed substrate 29 can be made smaller than the fixed substrate 13 of the membrane switch 24. Can be reduced in outer diameter.

(Embodiment 3) FIG. 10 is a front sectional view of a two-circuit push-on switch according to a third embodiment of the present invention, and FIG. 11 is an exploded perspective view of the same according to the first embodiment. On the other hand, it was mounted on a membrane switch 18 composed of a fixed substrate 13 insert-molded and fixed to the inner bottom surface of the switch case 11 and a movable substrate 15 mounted on the fixed substrate 13 at a predetermined interval. The difference is that a push button 36 with a flange portion 36A is further placed on the pressing surface 35C at the upper end of the central top portion 35B of the dome-shaped spring body 35.

The push button 36 is made of a rigid material, and a flat plate portion 36C on the lower surface of the columnar portion 36B at the center is formed by a flat press surface 35C on the upper end of the center top portion 35B of the dome-shaped spring body 35 made of an elastic insulating material. The cover 2 rests on the upper part, and the upper part of the columnar part 36 </ b> B covers the upper opening of the switch case 11.
0 through the center circular hole 20C with a small gap, and the part protruding upward constitutes a pressing projection 36D,
Furthermore, a circular flange portion 36A at the lower end of the columnar portion 36B.
Abuts against the back surface of the cover 20 to serve as a retaining portion for the push button 36 to move upward, and its outer periphery is fitted and held with a small gap in the inner periphery of the peripheral wall 20A below the cover 20.

The push-on switch according to the present embodiment is configured as described above. The operation of the push-on switch is mounted on the wiring board 21 of the equipment to be used, as shown in the front sectional view of the use state in FIG. In a state in which the push button 36 is pressed through the operation button 22 of the device in use,
When the upper surface is pressed downward, the pressing surface 35C at the upper end of the central top 35B of the dome-shaped spring body 35 in contact with the flat plate portion 36C on the lower surface is pressed downward, and the thin conical dome portion 3 is pressed.
5D elastically deforms with a sense of moderation, and its central top 3
The lower surface of 5B is connected to the membrane switch 18 via the pressing body 17.
The center of the movable substrate 15 is depressed and bent, and the short-circuit movable contacts 16A and 16B on the lower surface thereof are pressed against the opposed fixed substrate, and the corresponding two sets of comb-shaped fixed contacts 12 are formed.
A and 12B and 12C and 12D are almost simultaneously short-circuited, that is, two sets of connection terminals 14A and 14B and 14C and 14D are almost simultaneously connected, as in the first embodiment. When the force applied to the push button 36 via the operation button 22 is removed, the original state is returned by the elastic restoring force of the dome-shaped spring body 35,
Two sets of connection terminals 14A and 14B and 14C and 14
The opening between D is again in the same manner as in the first embodiment.

As described above, in the push-on switch according to the present embodiment, when the push button 36 pressed by the operation button 22 of the device to be used is lowered, the outer periphery of the cylindrical portion 36 B is While being guided by the central circular hole 20C, the outer periphery of the flange portion 36A is also guided by the inner periphery of the peripheral wall 20A of the cover 20, and moves downward. Since the pressing surface 35C at the upper end of the center top 35B of the dome-shaped spring body 35 pressed by the flat plate portion 36C on the lower surface of the columnar portion 36B is also pushed almost vertically downward without inclination, the center top 35
B. The movable substrate 1 of the membrane switch 18 pressed on the lower surface
5 movable contacts 16A and 16B for short-circuiting between the two sets of corresponding comb-shaped fixed contacts 12A and 12B and 12C and 12C.
D can be contacted at the same time more accurately than in the first embodiment to turn on two sets of switch circuits.

FIG. 13 is a front sectional view showing a structure for further stabilizing the operating characteristics of the two-circuit push-on switch according to the present embodiment.
Dome-shaped spring body 3
7, a central top portion 37A and a flange portion 3 placed thereon
This is the surface that the push button 38 with 8A contacts. Spring body 3
7 has a circular convex portion 37C at the center of the pressing surface 37B, and a circular concave portion 38 at the center of the flat plate portion 38B on the lower surface of the push button 38.
C are provided, and the difference is that the convex portion 37C and the concave portion 38C are engaged.

The engagement between the convex portion 37C and the concave portion 38C allows the pressing projection 3 of the push button 38 to be pressed.
8D, the pressing surface 37B at the upper end of the center top 37A of the spring body 37 is pushed in, and the dome portion 37D is elastically deformed to perform a switch operation.
8B and the pressing surface 37B of the spring body 37 are not displaced, so that when the push button 38 is lowered vertically, the central top portion 37A of the spring body 37 is also pressed vertically downward and pressed by its lower end surface 37E. The movable contacts 16A and 16B for short-circuiting of the movable substrate 15 of the membrane switch 18 are securely connected to the two sets of the comb-shaped fixed contacts 12 on the fixed substrate 13, respectively.
A and A can be connected stably at almost the same time by contacting between A and 12B and between 12C and 12D.

In the above description, as a switch case having a membrane switch on the inner bottom surface, the movable substrate 15 is placed at a predetermined interval on the fixed substrate 13 insert-molded and fixed to the inner bottom surface of the switch case 11. Although the case where the membrane switch 18 is constituted by the above has been described, it is possible that the membrane switch 24 or 34 formed in advance may be insert-molded and fixed to the bottom surface of the switch case as described in the second embodiment. Of course.

(Embodiment 4) FIG. 14 is a front sectional view of a two-circuit push-on switch according to a fourth embodiment of the present invention, and FIG. 15 is an exploded perspective view thereof.
Reference numeral 39 denotes a switch case made of an insulating resin and having an open top surface. A membrane switch 24 formed in advance and having a pressing body 17 at the center of the upper surface is insert-molded and fixed to the inner bottom surface thereof similarly to the second embodiment. , Two sets of connecting terminals 14A, 14B and 14C connected between the comb-shaped fixed contacts 12A and 12B and between 12C and 12D.
14D is led out.

On the movable substrate 25 of the membrane switch 24, a dome-shaped moderating plate 40 made of an elastic metal thin plate whose central portion protrudes upward is mounted, and further has a circular flange 41A on the upper portion thereof. The push button 41 is placed.

The push button 41 is made of a rigid material, and the projection 41B at the center of the lower surface rests on the moderating plate 40, and the projection at the center of the upper surface closes the opening of the upper surface of the switch case 39. The part penetrating through the circular hole 42A with a small gap therebetween and projecting upward constitutes a pressing projection 41C, and the circular flange 41A contacts the back surface of the cover plate 42 and It serves as an upward retaining portion, and its outer periphery is fitted and held movably up and down on the inner periphery of the peripheral wall 39A of the switch case 39 with a small gap.

The push-on switch according to the present embodiment is configured as described above. The operation of the push-on switch is mounted on the wiring board 21 of the equipment to be used as shown in the front sectional view of the use state in FIG. In the state in which the push button 41 is pressed via the operation button 22 of the device to be used,
When the upper surface is pushed downward, the dome-shaped moderating plate 40 on which the projection 41B on the lower surface is placed is pushed downward at the center of the upper surface,
It is elastically deformed with a clear sense of moderation in a short stroke, and the lower surface of the central part pushes down the center of the movable substrate 25 of the membrane switch 24 via the pressing body 17 to bend, and the short-circuit movable contact 16A on the lower surface and 16B, two sets of comb-shaped fixed contacts 12A on the fixed substrate 13 opposed to each other,
Shorting between the terminals 12B and between the terminals 12C and 12D, that is, between the two sets of connection terminals 14A and 14B and between the terminals 14C and 14D almost simultaneously, and excluding the force applied to the push button 41 via the operation button 22 thereafter And moderator 4
Returning to the original state by the elastic restoring force of 0, the two sets of connection terminals 14A and 14B and the areas between 14C and 14D are opened again as in the first to third embodiments.

As described above, according to the present embodiment, it is possible to realize a push-on switch having a clear moderation with a short operation stroke.

In the above description, the membrane switch which is formed in advance and is insert-molded and fixed to the inner bottom surface of the switch case 39 is the fixed substrate 13.
Two sets of comb-shaped fixed contacts 12A, 12 printed thereon
The connection terminals 14A, 14B and 14C, 14D are caulked to B, 12C, 12D, and the short-circuit movable contacts 16A, 16B are printed on the lower surface of the movable substrate 25. The two fixed contacts 27A and 27B are formed on the fixed substrate 29 by printing, and the connection terminals 28A and 28B are caulked as described in the second embodiment with reference to the exploded perspective view of FIG.
Needless to say, a membrane switch 34 in which two movable contacts 30A and 30B corresponding to the fixed contacts 27A and 27B are printed and formed on the lower surface of the movable substrate 32 and the connection terminals 31A and 31B are caulked and connected may be used. With this, a push-on switch having a clear moderation with a short operation stroke and a small external dimension can be realized.

In the first to fourth embodiments, the case where both the fixed contact on the upper surface of the fixed substrate and the movable contact on the lower surface of the movable substrate forming the membrane switch are formed by printing with conductive paint has been described. In any of these, a fixed contact and a movable contact may be formed by attaching a metal foil on an insulating substrate and then performing an etching process to thereby increase the capacity of the switch. In addition, the operating life of the switch can be extended.

In the first to fourth embodiments, the case where the number of circuits of the push-on switch is two has been described as an example. However, in each case, the number of fixed contacts and the number of movable contacts corresponding thereto are fixed. Needless to say, by increasing the number of switches, a push-on switch having a larger number of circuits can be realized.

[0051]

As described above, according to the present invention, an electric circuit which can operate a plurality of circuits simultaneously is inexpensive because it has a simple structure, has few components, and does not require assembling man-hours. The advantageous effect that a push-on switch having excellent characteristics can be provided is obtained.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a two-circuit push-on switch according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is an external perspective view of the fixed substrate.

FIG. 4 is a bottom view of the movable substrate.

FIG. 5 is a front sectional view of the same use state.

FIG. 6 is a front sectional view of a two-circuit push-on switch according to a second embodiment of the present invention.

FIG. 7 is an exploded perspective view of the same.

FIG. 8 is an exploded perspective view of the membrane switch.

FIG. 9 is an exploded perspective view of a membrane switch having another configuration.

FIG. 10 is a front sectional view of a two-circuit push-on switch according to a third embodiment of the present invention.

FIG. 11 is an exploded perspective view of the same.

FIG. 12 is a front sectional view of the same use state.

FIG. 13 is a front sectional view of a two-circuit push-on switch having the same configuration.

FIG. 14 is a front sectional view of a two-circuit push-on switch according to a fourth embodiment of the present invention.

FIG. 15 is an exploded perspective view of the same.

FIG. 16 is a front sectional view of the same use state.

FIG. 17 is a front sectional view of a conventional push-on switch.

FIG. 18 is an exploded perspective view of the same.

[Explanation of symbols]

11, 23, 39 Switch case 11A, 39A Peripheral wall 11B Step 11C Corner 11D Dowel 12A, 12B, 12C, 12D Comb-shaped fixed contact 13, 29 Fixed substrate 14A, 14B, 14C, 14D, 28A, 28B, 3
1A, 31B Connection terminal 15, 25, 32 Movable board 16A, 16B Movable contact for short circuit 17 Pressing body 18, 24, 34 Membrane switch 19, 35, 37 Spring body 19A Outer periphery 19B, 35D, 37D Dome 19C, 35B , 37A Center top 19D, 36D, 38D, 41C Pressing projection 20 Cover 20A Peripheral wall 20B Lower surface 20C, 42A Circular hole 21 Wiring board 22 Operation button 26, 33 Spacer 27A, 27B Fixed contact 30A, 30B Movable contact 35C, 37B Pressing surface 36, 38, 41 Push button 36A, 38A, 41A Flange portion 36B Columnar portion 36C, 38B Flat plate portion 37C Convex portion 38C Concave portion 37E Lower end surface 40 Moderation plate 41B Projection 42 Cover plate

Claims (12)

[Claims] 1. A fixed substrate having a plurality of fixed contacts on an upper surface, and a flexible movable substrate facing a fixed substrate above the fixed substrate at a predetermined interval and having a plurality of movable contacts corresponding to each fixed contact on a lower surface. And a switch case made of insulating resin with an open top, with the membrane switch arranged on the inner bottom surface, and fixed to the back of the movable contact on the movable substrate of the membrane switch so as to cover the entire movable contact The rigid pressing body and the thick outer peripheral lower surface are placed on the outer peripheral portion of the membrane switch along the inner peripheral wall of the switch case, and the lower surface of the thick central top portion connected by the thin conical portion is A dome-shaped spring body made of an elastic insulating material in which the upper portion of the central top is a projection for pressing, which is arranged so as to be located above the pressing body, and closes the opening of the switch case,
The outer peripheral lower surface is fixed to the upper peripheral portion of the switch case so as to press the outer peripheral portion upper surface of the dome-shaped spring body, and the pressing projection at the upper part of the central top of the dome-shaped spring body penetrates vertically so as to be vertically movable. Push-on switch consisting of a cover with holes. 2. A cover having a cap shape having a through hole in the center of the upper surface with the lower surface open, and the outer periphery thereof is held movably up and down by the inner periphery of a peripheral wall of the cover, and a projection at the center of the upper surface is formed upward from the through hole of the cover. 2. The push-on switch according to claim 1, wherein the protruding push button made of a rigid material is mounted on the upper surface of the center top of the dome-shaped spring body in the switch case. 3. An upper surface of a central top portion of the dome-shaped spring body and a lower surface of the push button are brought into contact with each other while a convex portion provided on one surface is engaged with a concave portion provided on the other surface. Item 2. The push-on switch according to Item 2. 4. A switch case having a plurality of sets of fixed contacts and connection terminals electrically connected to the respective fixed contacts, wherein the fixed contacts are exposed upward so that the connection terminals are led out. A fixed substrate made of an insulating material fixed by insert molding, and a short-circuit movable contact corresponding to the plurality of sets of fixed contacts are provided on a lower surface, a pressing body is fixed on the upper surface, and an inner peripheral wall of a switch case is provided. The membrane switch according to any one of claims 1 to 3, wherein the membrane switch is constituted by a movable substrate made of a flexible insulating material and placed on the step portion of the bottom surface and arranged to face the fixed substrate at a predetermined interval. Push-on switch described in one of the above. 5. The push-on switch according to claim 4, wherein the fixed substrate is formed of a hard insulating substrate. 6. A fixed substrate made of a hard insulating material having a plurality of sets of fixed contacts and connection terminals electrically connected to the respective fixed contacts, and a short-circuit movable contact corresponding to the plurality of sets of fixed contacts on a lower surface. A movable substrate made of a flexible insulating material having a pressing body fixed to the upper surface thereof is formed in advance by bonding via a spacer such that the fixed contact and the short-circuit movable contact face each other at a predetermined interval. The push-on switch according to any one of claims 1 to 3, wherein the membrane switch is insert-molded and fixed to the bottom of the switch case so that the movable substrate is exposed upward and the connection terminal is led out. 7. A fixed substrate made of a hard insulating material having a plurality of fixed contacts and connection terminals electrically connected to the fixed contacts, and a movable contact corresponding to each of the fixed contacts on a lower surface. A movable substrate made of a flexible insulating material having a conductive connection terminal and a pressing body fixed to the upper surface thereof is interposed via a spacer such that each fixed contact and the movable contact face each other at a predetermined interval. 4. A membrane switch formed in advance and fixed to the bottom of the switch case by insert molding so that the movable substrate is exposed upward and all connection terminals are led out. Push-on switch according to one. 8. The push-on switch according to claim 4, wherein the fixed contact of the fixed substrate is a combination of comb-shaped contacts facing each other. 9. The fixed contact of the fixed substrate and the movable contact of the movable substrate are formed by printing conductive paint, and the connection terminals are caulked. Push-on switch. 10. The fixed contact of the fixed substrate and the movable contact of the movable substrate are formed by bonding a metal foil and then performing etching, and the connection terminals are caulked. The push-on switch according to any one of the above. 11. A fixed substrate made of a hard insulating material having a plurality of sets of fixed contacts and connection terminals electrically connected to the respective fixed contacts, and a short-circuit movable contact corresponding to the plurality of sets of fixed contacts may be provided on a lower surface. A movable substrate made of flexible insulating material is connected to a membrane switch in which a fixed contact and a short-circuit movable contact are opposed to each other at a predetermined interval via a spacer, and the movable substrate is exposed upward to connect the movable contact. A switch case made of insulating resin in a box shape with an open top that is insert molded and fixed to the inner bottom surface so that the terminals are led out, and the entire movable contact on the back of the movable contact on the movable substrate of the membrane switch A rigid pressing body fixed so as to cover the outer periphery of the membrane switch along the inner periphery of the peripheral wall of the switch case, the lower end of the outer periphery is placed on the outer periphery, and the central portion projects upward. A dome-shaped moderator made of a thin metal plate, a cover fixed to the upper end of the outer periphery of the switch case so as to cover the opening of the switch case, and having a through hole in the center, and an outer periphery that moves up and down on the inner periphery of the peripheral wall of the switch case A push-on switch comprising a push button made of a rigid material placed on the upper surface of the moderator so that the protrusion at the center of the upper surface protrudes upward from the through hole of the cover plate. 12. A fixed substrate made of a hard insulating material having a plurality of fixed contacts and connection terminals electrically connected to the fixed contacts,
A movable substrate made of a flexible insulating material having a movable contact corresponding to each of the above fixed contacts on a lower surface and having a connection terminal electrically connected to each of the movable contacts is provided at a predetermined interval between each of the fixed contacts and the movable contact. And a top surface on which the membrane switch is insert-molded and fixed to the inner bottom surface so that the movable substrate is exposed upward and the connection terminals are led out. An open box-shaped switch case made of insulating resin, a rigid pressing body fixed to the back surface of the movable contact of the movable substrate of the membrane switch so as to cover the entire movable contact, and an inner peripheral wall of the switch case along the inner periphery. A dome-shaped moderating plate made of an elastic thin metal plate with the outer peripheral lower end resting on the outer peripheral part of the membrane switch and the central part protruding upward, and a switch case so as to cover the opening of the switch case And a cover having a through hole in the center, and the outer periphery is held movably up and down by the inner periphery of the peripheral wall of the switch case, and the protrusion at the center of the upper surface projects upward from the through hole of the lid plate. A push-on switch consisting of a push button made of a rigid material placed on the upper surface of the moderator.