KR20050065433A - Sheet having a movable contact attached and push button switch using the same - Google Patents

Abstract

An object of the present invention is to provide a sheet with a movable contact capable of mixing a plurality of types of movable contacts having different strokes and a push button switch using the same.

In order to solve the above problem, the first movable contact 3 and the second movable contact 4 having a larger stroke until the inner surface of the expansion protrusion is inverted by pressure and come into contact with the central fixed contact than the first movable contact 3. ) And the first sheet 1 having the receiving holes 1a and 1b that can accommodate the first and second movable contacts 3 and 4, and the first and second movable parts by the adhesive portion 5a on the back surface. The second sheet 5 which holds the contacts 3, 4 and closes the upper surfaces of the receiving holes 1a, 1b of the first sheet 1, is provided with the first or second sheets 1, 5. The first sheet according to the stroke difference between the first movable contact 3 and the second movable contact 4 while the first and second movable contacts 3 and 4 are mixed with each other as a common sheet. By setting the thickness of (1) to constant thickness, the height position hold | maintained in the 2nd sheet | seat 5 of the 1st and 2nd movable contacts 3 and 4 was adjusted.

Description

SHEET HAVING A MOVABLE CONTACT ATTACHED AND PUSH BUTTON SWITCH USING THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a push button switch used as an operation switch for various electronic devices, and more particularly, to a dome-shaped expansion projection part that is inverted to press and move a seat with a movable contact and a push button switch to connect and disconnect contacts. It's about structure.

As a structure of the conventional movable contact attached sheet and push button switch, a structure of a sheet type push button switch in which a movable contact attached sheet having a plurality of circular dome-shaped movable contacts attached to an adhesive sheet is arranged on a substrate is known (example For example, refer patent document 1).

The structures of this conventional movable contact seat and push button switch are shown in Figs. Fig. 10 is an exploded perspective view of a conventional seat with a movable contact, and Fig. 11 is a sectional view of principal parts of a push button switch using a conventional seat with a movable contact.

In the figure, the plurality of movable contacts 51 are made of a sheet metal of a circular dome shape having a spring property such as stainless steel or phosphor bronze, and are displaceable with respect to the pressing force from the top. The movable contact 51 does not have a hole penetrating into the dome shape, and has a contact portion 51a formed to protrude into the dome shape at the center portion thereof.

The adhesive sheet 52 consists of film materials, such as a polyester resin, is flexible sheet-like sheet part 53, the some hole 52a formed in this sheet part 53, and this hole ( It consists of the adhesive 54 formed in the part except the airway part 55 which consists of a non-adhesive part formed in the lower surface of the sheet | seat part 53 except 52a).

The airway portion 55 is formed by screen printing the adhesive 54 on the lower surface of the sheet portion 53, and at least one end thereof is an outer circumferential end of the hole 52a of the adhesive sheet 52 or the adhesive sheet 52. It is connected to the airway tool 56 located at the edge 52b. And the upper surface of the movable contact 51 is affixed to the adhesive 54 of the adhesive sheet 52, and at least one part of the upper surface of the movable contact 51 and the edge part 51b of the movable contact 51 is an airway part ( 55) It is attached on the mounted state.

The separator 57 consists of a polyester film of substantially the same shape as the adhesive sheet 52, and has the some hole 57a which penetrated through the upper and lower surfaces. In addition, the separator 57 is attached to the lower surface of the adhesive sheet 52 so that the holes 52a and the holes 57a of the pressure sensitive adhesive sheet 52 overlap each other by facing each other by the pressure sensitive adhesive 54 of the pressure sensitive adhesive sheet 52. It is. And this separator 57 comprises the sheet | seat 58 with a movable contact by holding the movable contact 51 between the adhesive sheet 52, and protecting the lower surface of the movable contact 51. As shown in FIG.

The hole 52a of the adhesive sheet 52 is a hole for exposing a light emitting element such as a light emitting diode (LED) not shown, and the sheet portion is provided with an operating body (not shown) for pressing and operating the movable contact 51. At 53, light can be efficiently reflected and dimmed.

11 shows a push button switch, the insulating substrate 59 is made of a flexible substrate such as a polyimide film, and has a circular first fixed contact 59a made of copper foil on the surface thereof, and the first fixed contact ( A substantially C-shaped second fixed contact 59b surrounding 59a) is formed by etching.

And by peeling the separator 57 adhering to the lower surface of the adhesive sheet 52 of the sheet | seat with a movable contact 58, the adhesive 54 of the adhesive sheet 52 is exposed and the edge part of the movable contact 51 ( 51b) is opposed to the second fixed contact 59b, and the adhesive sheet 52 is attached to the upper surface of the insulating substrate 59. As shown in FIG. At this time, the movable contact 51 is placed on the surface of the insulating substrate 59 in a state where the peripheral edge of the end portion 51b is always in contact with the second fixed contact 59b.

[Patent Document 1] Japanese Unexamined Patent Publication No. 2001-160334

In various electronic devices in which the above-described conventional movable contact sheet and push button switch are used as operation switches, the contact portion protruding in the dome shape (inside the expansion projection) of the movable contact placed on the second fixed contact is provided. There is a demand to mix each movable contact with a different stroke until it is reversed by pressing and comes into contact with the first fixed contact on one sheet. However, when a movable contact having a different stroke until inverted by contact with the fixed contact is mixed on a sheet, the lower peripheral edge of the movable contact having a smaller stroke floats on the lower surface of the sheet, whereby the fixed contact of the insulating substrate There was a problem that contact with the instability became unstable.

Therefore, in order to solve the above-mentioned problem, the present invention provides a movable contact-attached sheet and a push button switch using the same, which are capable of mixing a plurality of movable contacts with different strokes until the contact portion is inverted by pressure and comes into contact with the fixed contact. It aims to provide.

In order to solve the above problems, in the present invention, as a first solution, a movable contact having a dome-shaped expansion projection is placed on a peripheral fixed contact formed on an insulating substrate, and the expansion projection of the movable contact is reversed by pressing. As a switch part used in a push button switch that moves a predetermined stroke until the inner contact portion contacts with the central fixed contact formed on the insulating substrate and switches electrical conduction between the central fixed contact and the peripheral fixed contact through the movable contact. A sheet with a movable contact, wherein a plurality of movable contacts are held on a common sheet to be stacked on the insulating substrate, wherein the movable contact is a first movable contact and a second having a larger stroke than the first movable contact. A first sheet having a movable contact, the sheet having a receiving hole to accommodate the first and second movable contacts; And a second sheet having an adhesive portion on the back surface and holding a part of the first and second movable contacts by the adhesive portion and blocking an upper surface of the receiving hole of the first sheet, wherein the first movable contact is provided. By setting the thickness of the first sheet to a constant thickness according to the stroke difference between the second movable contact and the second movable contact, the height position held in the second sheet of the first and second movable contacts was adjusted.

Further, as a second solving means, the first sheet forms a thickness lower than a height of an outer surface of the expansion protrusion of the first movable contact so that the first movable contact is not lifted from the lower end of the receiving hole. It was set as the structure formed in the thickness range which the adhesion part of a said 2nd sheet | seat does not reach in the outer peripheral edge part of a said 2nd movable contact so that the reversal operation of a 2nd movable contact may not be prevented.

Moreover, as a 3rd solution means, the said 1st movable contact is formed with the plate spring of the reversible circular dome shape, and said 2nd movable contact is the opposing both side surface of the edge part of the lower end of the reversible circular dome-shaped leaf spring. It was set as the structure which the part was cut out and formed in elongate shape.

Further, as a fourth solution, the second sheet is formed in a sheet color that can be distinguished from the outside of the second sheet by changing the appearance of the first movable contact and the second movable contact, and at the same time. It was set as the structure.

Moreover, as a 5th solution means, the said 2nd sheet | seat is formed into one sheet | seat which covers the accommodating hole of the said 1st sheet from upper direction, and the said 1st and 2nd movable contact is mixed using the said 2nd sheet as a common sheet | seat. One configuration was made.

Moreover, as a 6th solution means, the said 2nd sheet | seat is formed with the several sheet | seat which covers the accommodating hole of the said 1st sheet | seat separately from upper part, and the said 1st and 2nd movable contact point makes the said 1st sheet a common sheet | seat. It was set as the mixed configuration.

In addition, as a 7th means, the external shape or the color of the said 2nd sheet was made into different structures according to the difference of the stroke of an individual movable contact.

Further, as the eighth solution means, the first peripheral fixation on which the seat with the movable contact according to any one of the first to seventh solutions and the lower periphery of the first movable contact housed in the movable contact attached sheet are placed. A first central fixed contact disposed adjacent to the first peripheral fixed contact, the bottom surface of the top of the dome-shaped expansion protrusion of the first movable contact so as to be connectable and detachable, and the second movable contact; A second peripheral fixed contact on which the lower periphery of the lower end is placed, and a lower surface of the top of the dome-shaped expansion protrusion of the second movable contact is disposed adjacent to the second peripheral fixed contact so as to be connectable and detachable. A second central fixed contact, the first and second peripheral fixed contacts, and an insulating substrate on which the first and second central fixed contacts are disposed It was.

Best Mode for Carrying Out the Invention

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of the sheet | seat with a movable contact of this invention, and pushbutton switch is shown to FIG. 1 is a plan view of a sheet with a movable contact of the present invention, FIG. 2 is an explanatory view of essential parts of a receiving hole portion of a second movable contact of a sheet with a movable contact, FIG. 3 is a plan view of a second movable contact, and FIG. 4 is with a movable contact The principal part sectional drawing of a sheet | seat, FIG. 5 is a principal part sectional drawing in the 5-5 line | wire of FIG. 4, FIG. 6 is a principal part sectional drawing which shows another embodiment of the sheet | seat with a movable contact, FIG. Fig. 8 is a sectional view showing the main parts in the 8-8 line of Fig. 7, and Fig. 9 is a sectional view showing the main parts of another embodiment of the push button switch using the sheet with movable contacts.

1-5, the 1st sheet 1 is formed in substantially rectangular shape by film materials, such as a polyester resin, and 1st and 2nd accommodation holes which penetrate up and down in the longitudinal direction and the width direction are shown in FIG. A plurality of (1a, 1b) is arranged in the width and length. Moreover, the said 1st accommodating hole 1a is formed in circular shape, and the said 2nd accommodating hole 1b is a wide width | variety part (it shows L1 in FIG. 2), and a narrow narrow part (in FIG. 2). L2) is formed into an elliptical shape having a long shape. And the 2nd accommodating hole 1b is arrange | positioned in multiple numbers in the lengthwise direction, and the width part adjacent to the direction orthogonal to this, and the narrow width part mutually faced mutually.

Further, the first sheet 1 is provided with air flow path connecting grooves 1c and 1d between the adjacent first and second receiving holes 1a and 1b. The connecting grooves 1c and 1d penetrate up and down in the same manner as the first and second receiving holes 1a and 1b, and the first and second receiving holes 1a and 1b adjacent to the longitudinal direction are separated from each other. It is formed between them. In addition, when the 2nd movable contact 4 mentioned later is accommodated in the said 2nd accommodation hole 1b, the length of this 2nd movable contact 4 is formed along the longitudinal direction. Moreover, the adhesive part 2 in which the adhesive agent was apply | coated is formed in the back surface of the said 1st sheet 1. As shown in FIG.

The 1st movable contact 3 is accommodated in the said 1st accommodating hole 1a. The first movable contact 3 is made of a conductive thin metal plate and has a circular dome shape in plan view, having an inverted expansion projection in the center. That is, the 1st movable contact 3 is a lower peripheral part 3a put on the 1st peripheral fixed contact 8b of the 1st fixed contact 8 mentioned later, and this lower peripheral part 3a. And a skirt portion 3b that rises at a predetermined angle from the back, and an invertible dome-shaped expansion projection portion 3c that is continuous to the skirt portion 3b. In addition, a contact portion 3d whose surface is covered with silver plating is formed on the inner surface of the expansion projection portion 3c, and the contact portion 3d is spaced apart in a projection shape in a range in which the contact portion 3d can be contacted with the center fixed contact of the insulating substrate described later. And a plurality is formed. The contact portion 3d does not necessarily need to be plural as long as it can come into contact with the center fixed contact. However, in order to improve contact reliability against foreign matters such as cutting debris of the insulating substrate, the plurality of contact portions 3d are avoided. It is preferable that the contact point of is formed so that formation is possible. Therefore, it is not necessary to protrude from the inner surface of the expansion protrusion, and may be formed in a concave shape in which the edge portion is in contact with the center fixed contact. In this case, the concave edge portion becomes a contact portion.

The second movable contact 4 is accommodated in the second accommodation hole 1b. The second movable contact 4 is similarly made of a thin sheet metal plate of a conductive shape, and is formed in a dome shape having an inverted protruding portion in the center. That is, the second movable contact 4 has a lower periphery edge portion 4a that is placed on the second peripheral fixed contact 9b of the second fixed contact 9 described later, and the lower peripheral edge portion 4a. And a skirt portion 4b that rises at a predetermined angle from the back portion, and an invertible dome-shaped expansion projection portion 4c that is continuous to the skirt portion 4b. In addition, a contact portion 4f whose surface is covered with silver plating is formed on the inner surface of the expansion protrusion 4c, and the contact portion 4f has a projection shape in a range in which the contact portion 4f can be contacted with the center fixed contact of the insulating substrate described later. A plurality is separated and formed. The contact portion 4f does not necessarily need to be plural as long as the contact portion can contact the center fixed contact. However, in order to improve contact reliability against foreign matters such as cutting debris of the insulating substrate, the plurality of contact portions 4f are avoided. It is preferable that the contact point of is formed so that formation is possible. Therefore, it is not necessary to protrude from the inner surface of the expansion protrusion, and may be formed in a concave shape in which the edge portion is in contact with the center fixed contact. In this case, the concave edge portion becomes a contact portion.

Moreover, the said skirt part 4b is formed in the elongate shape which has opening part 4d in the both side surface part by cutting in parallel in opposing both side surface parts of the 2nd movable contact 4, and the said lower periphery edge The pair 4a is formed in pairs at positions facing each other with the expansion protrusion 4c interposed therebetween. Further, the center of the circle constituting the outer periphery of the lower circumferential edge portion 4a and the top of the dome-shaped expansion protrusion 4c continuous to the skirt portion 4b are formed different from each other, and the lower circumferential edge portion ( The size of the outer circumferential circle of 4a) is formed to be a large arc compared to the size of the outer circumferential circle formed by the center of the dome-shaped expansion projection 4c continuous to the skirt portion 4b.

Further, both ends of the arc of the lower periphery edge portion 4a of the skirt portion 4b have a large arc with respect to the trajectory of the arc with the skirt portion 4b centered on the top of the dome-shaped expansion protrusion 4c. At the point formed so that this end part may bulge outward, the contact part 4e which is mounted on the 2nd peripheral fixed contact 9b of the 2nd fixed contact 9 which this both ends will mention later is connected. )

When the second movable contact 4 of the above configuration is placed on the second fixed contact 9, the contact portion 4e abuts on the second peripheral fixed contact 9b, and the skirt portion 4b The dome-shaped expansion projections 4c continuous to each other are arranged to face each other in a state spaced apart from the second central fixed contact 9a. At this time, the second movable contact 4 is formed in a long shape in which both side portions of the skirt portion 4b are cut in parallel, but the skirt portion 4b and the dome-shaped expansion projection portion 4c continuous to the skirt portion 4b are formed. The size of the outer circumference is formed on the basis of the length of the long direction. Moreover, the contact part 4e which bulged outward is formed in the both ends of the circular arc of the lower peripheral part 4a of the said skirt part 4b.

Thus, since the 2nd movable contact 4 was formed in the elongate shape which provided the opening part 4d in the both side surface part, the skirt part 4b and the dome-shaped expansion protrusion part 4c which contact | connect continuously are large, It can be formed in a diameter, so that the desired stroke (S2), the inner surface of the expansion projection (4c) of the second movable contact 4 is reversed by pressurization until the contact portion (4f) is in contact with the second center fixed contact (9a) Miniaturization is possible while securing the stroke). Moreover, the 2nd accommodating part 1b of the said 1st sheet 1 which accommodates the 2nd movable contact 4 can be formed in elliptical shape of long length according to the external shape of the 2nd movable contact 4. Therefore, the arrangement pitch which arranges the 2nd accommodating part 1b in the narrow part direction can be formed small, and the size of the sheet | seat with a movable contact is attained.

In addition, the opening portion 4d is not necessarily cut out in parallel, but may be formed in a shape having a long length by being cut out in an arc shape.

In addition, in order to change a stroke, the external size of the 2nd movable contact 4 may be made into the circular dome shape of planar view larger in size than the 1st movable contact 3. In addition, the parts may be projected outward from the outer circumferential edge of the circular dome, and the strokes may be varied by the parts.

The 2nd sheet 5 is formed in substantially rectangular shape similarly to the said 1st sheet 1 by film materials, such as a polyester resin, similarly. The second sheet 5 is provided with an adhesive portion 5a coated with an adhesive on the back surface thereof, and the adhesive portion 5a forms a dome shape of the first and second movable contacts 3 and 4. On the upper surface side of the first sheet 1 in a state in which the upper surfaces of the first and second accommodation holes 1a and 1b of the first sheet 1 are blocked while maintaining the upper surfaces of the expansion protrusions 3c and 4c. Attached.

Moreover, the peeling sheet 6 formed from film materials, such as a polyester resin, is affixed on the adhesive part 2 side (lower surface side) to which the adhesive agent of the said 1st sheet 1 was apply | coated. This peeling sheet 6 conveys until the said 1st and 2nd movable contacts 3 and 4 are mounted on the 1st and 2nd fixed contacts 8 and 9 of the insulated substrate 7 mentioned later, During assembly, the first and second movable contacts 3 and 4 are protected.

Moreover, in the said structure, the thickness of the said 1st sheet 1 in which the 1st and 2nd accommodating holes 1a and 1b which accommodate the said 1st and 2nd movable contacts 3 and 4 are formed is 1st movable contact. (3) and the contact portions 3d and 4f on the inner surfaces of the strokes S1 and S2 of the expansion projections 3c and 4c of the second movable contact 4 are reversed by pressurization so that the first and second central fixed contacts 8a , The height position held in the second sheet 5 of the first and second movable contacts 3 and 4 is adjusted by setting the thickness to a constant thickness according to the difference between the stroke until contact with 9a). .

That is, the first sheet 1 has a thickness of the expansion protrusion 3c of the first movable contact 3 so that the first movable contact 3 is not lifted from the lower end of the first receiving hole 1a. The second sheet 5 is formed in the skirt portion 4b, which is formed at a thickness lower than the height and at the same time as the outer peripheral edge of the second movable contact 4 so as not to interfere with the inversion operation of the second movable contact 4. It is formed in the thickness range which the adhesion part 5a does not reach.

Moreover, when forming a movable contact sheet using only one type of the said 1st movable contact 3 normally, the thickness of the said 1st sheet 1 is formed in about 50 micrometers, In the structure of the said Example of this application, Since the one movable contact sheet is formed using the said 1st movable contact 3 and the said 2nd movable contact 4 which is larger in stroke, the thickness of the said 1st sheet 1 is mentioned, for example. For example, it is formed in about 75 micrometers.

In this case, when the thickness of the first sheet 1 is 100 μm, the lower periphery edge portion 3a of the first movable contact 3 floats on the lower surface of the first sheet 1, and is mounted on the insulating substrate. When the push button switch is formed, the contact with the first fixed contact 8 described later becomes unstable, and when the thickness of the first sheet 1 is 50 µm, the second movable contact 4 The adhesion part 5a of the said 2nd sheet | seat 5 is covered by the skirt part 4b of the said (2), and the problem that the inversion operation at the time of a pressurization operation is interrupted becomes a malfunction.

Therefore, in the present embodiment, by setting the thickness of the first sheet 1 to about 75 µm, the strokes S1 and S2; the expansion projections 3c and 4c are respectively applied to the first and second sheets 1 and 5, respectively. The first and second movable contacts 3, 4 whose inner surfaces are inverted by pressure and whose strokes until the contact portions 3d, 4f come into contact with the first and second central fixed contacts 8a, 9a are different. It is possible to mix them.

In addition, in the present embodiment, the first sheet 1 and the second sheet 5 are previously joined together to form an integrated semi-finished product, and the first and second movable contacts 3, 3, are provided below the receiving holes 1a, 1b. Since 4) can be assembled by attaching to the adhesive 5a of the second sheet 5, the assembling work can be efficiently performed. Further, by arranging the first and second movable contacts 3 and 4 in a predetermined arrangement in advance on a jig in which concave grooves are formed, the plurality of first and second movable contacts 3 and 4 are arranged in a first manner. It is also possible to mount at once from the lower surface side of the sheet 1.

In addition, in the present embodiment, the second sheet 5 may be formed of a transparent sheet or a sheet having a light background color, and visually discernible differences in the external shape of the movable contact mounted inside the sheet upper surface side. In this case, the difference in the stroke of the mounted movable contact can be easily identified and inspected by the naked eye, thereby preventing the incorrect mounting.

As mentioned above, the sheet | seat with a movable contact of this embodiment is comprised.

In this case, the second movable contact 4 is formed into a horizontal length with the adjacent opening portions 4d facing each other, and the plurality of second movable contacts 4 are accommodated in the second accommodation holes 1b of the first sheet 1. Narrow pitch of the sheet | seat with a movable contact is attained. Moreover, since the lower surface side of the 1st sheet 1 is covered with the said protective peeling sheet 6, handling and assembly of conveyance and preparation can be simplified, and workability improves.

In the present Example, the said peeling sheet 6 is used as a carrier tape at the time of conveyance and assembly of the sheet | seat with a movable contact, and the hole for guide pins of an automatic machine is formed in the opposing both side parts of the peeling sheet 6 in the longitudinal direction. 6a) is formed.

Fig. 6 shows another embodiment of the sheet with movable contact of the present invention, in which the second sheet 5 is formed in the form of a substantially rectangular single sheet like the first sheet 1 Although the 2nd sheet | seat 5 was made into the common sheet | seat, as shown in FIG. 6, in this embodiment, the 1st sheet | seat 1 was made into the common sheet | seat instead of this, and the 2nd sheet | seat 5 was made into several sheets. It is formed by the individual sheets 5A and 5B each made of small pieces, and the individual sheets 5A and 5B are individually used as the first and second accommodating portions 1a and 1b of the first sheet 1. The first sheet (1) individually while the upper surfaces of the first and second movable contacts (3, 4) accommodated in the upper and lower surfaces of the first and second receiving holes (1a, 1b) are blocked. ) Is attached to the upper surface side of the

Further, in the above embodiment, the connecting grooves 1c and 1d for air distribution are formed by communicating the first sheet 1 with the receiving holes 1a and 1b so as to penetrate up and down. Connecting groove 1c for air distribution by forming a non-adhesive part so that air can move between the 1st and 2nd accommodation holes 1a and 1b adjacent to the adhesion part 2 apply | coated on the back surface of the 1 sheet | seat 1 , 1d).

The rest of the configuration is the same as that of the above embodiment.

The sheet with movable contact of the present invention is a mixture of the first and second movable contacts 3, 4 in the first and second sheets 1, 5; 5A, 5B, and a first movable contact ( 3) and inner surfaces of the strokes S1 and S2 of the second movable contact 4 and the expansion projections 3c and 4c are reversed by pressurization so that the contact portions 3d and 4f become the first and second central fixed contacts 8a, 9a), the thickness of the first sheet 1 is set to a constant thickness, so that the second sheet 5 of the first and second movable contacts 3, 4 is held in the By adjusting the height position to be made and adjusting the difference of this stroke by the thickness of the 1st sheet 1, the 1st and 2nd movable contacts 3 and 4 in which a stroke differs, respectively are mixed in a common sheet | seat. Therefore, mounting to the insulated substrate 7 mentioned later can be performed integrally, workability can be improved, and cost is low. Can.

In addition, since the 2nd sheet 5 which hold | maintains the 1st and 2nd movable contacts 3 and 4 can be formed by the small piece only of the area containing the attachment clearance part with respect to the 1st sheet 1, it is used. The sheet material can be reduced.

Moreover, when the switch part from which a stroke differs among the push button switches in which many switch parts were arrange | positioned, only the 2nd sheet | seat 5 of the said site | part is formed by the individual sheet of a small piece, and the other switch part forms the 2nd sheet 5 You may make it form the individual sheet | seat widely formed by connecting in one sheet.

In addition, the second sheet of the switch portion having different strokes may have a different color and appearance than the second sheet of the other switch portion. In that case, the difference in the stroke of the mounted movable contact can be easily identified and inspected. Misfitting can be prevented.

7 and 8 show the configuration of a push button switch using a sheet with a movable contact, and the insulating substrate 7 serving as a base die is formed of a laminated plate such as a phenol resin, and the On the upper surface, first and second fixed contacts 8, 9 printed with a conductive material such as carbon or silver foil are formed. The first and second fixed contacts 8, 9 are provided with the first and second central fixed contacts 8a, 9a formed in the center thereof, and the first and second central fixed contacts 8a, 9a interposed therebetween. It consists of the 1st and 2nd peripheral fixed contacts 8b and 9b arrange | positioned facing both sides.

Moreover, you may arrange | position a 1st and 2nd peripheral fixed contact 8b, 9b so that it may oppose a pair, and may connect and arrange in a jagged shape or ring shape. In addition, you may arrange | position only 1st and 2nd peripheral fixed contacts 8b and 9b, without facing a pair.

When the sheet with the movable contact described above is placed on the insulating substrate 7, the peeling sheet 6 is peeled off from the adhesion part 2 side (lower surface side) of the first sheet 1, The adhesive sheet 2 of the first sheet 1 causes the first sheet 1 to be attached to the insulating substrate 7. At this time, the lower periphery edge portion 3a of the first movable contact 3 is in contact with the first peripheral fixed contact 8b and is a dome-shaped expansion projection 3c continuous to the skirt portion 3b. Of the contact portions 3d are arranged to face each other in a state spaced apart from the first central fixed contact 8a. Moreover, the contact part 4e of the said 2nd movable contact 4 contacts the said 2nd peripheral fixed contact 9b, and the contact of the dome-shaped expansion protrusion part 4c continuous to the skirt part 4b. The portion 4f is disposed to face each other in a state spaced apart from the second central fixed contact 9a.

Referring to the operation of the push button switch having the above configuration, in the initial state shown in Figs. 7 and 8, between the first and second fixed contacts 8a, 8b and 9a, 9b is non-conductive and the switch is turned off. have. Here, when the upper surface side of the second sheet 5 is pressed by an operation unit such as an electronic device (not shown), first, when the upper surface of the first movable contact 3 is pressed, the dome shape of the movable contact 3 is expanded. The projection 3c is pushed downward to invert, and this inversion causes the contact portion 3d on the inner surface side of the expansion projection 3c to come into contact with the first central fixed contact 8a disposed to face the movable contact ( Through 3), the first center fixed contact 8a and the first peripheral fixed contact 8b are in an electrically conductive state, and a signal is output.

At this time, the air which has stayed in the first accommodation hole 1a flows out through the connecting groove 1c to the other adjacent first accommodation hole 1a which is connected through the inversion of the movable contact 3. . For this reason, there is no possibility that the operation | movement at the time of inversion of the movable contact 3 may be impaired, and favorable inversion operation will be obtained. In addition, since the receiving holes 1a and 1b and the connecting groove 1c are sealed from the top and the bottom by the second sheet 5 and the insulating substrate 7, the air does not communicate with the outside, so that the dust is dusted from the outside. Can be prevented from intruding into the contact.

Next, when the pressurization of the second sheet 5 is released from the above state, the movable contact 3 is inverted upward by its own spring force, and by this inversion, the inner surface side of the expansion projection 3c is inverted. The contact portion 3d is spaced apart from the first center fixed contact 8a so that the first center fixed contact 8a and the first peripheral fixed contact 8b are electrically cut off to be in an off state.

On the other hand, when the upper surface of the second movable contact 4 is pressed down, the dome-shaped expansion projection 4c of the second movable contact 4 is similarly pressed down and reversed, thereby inverting the expansion projection 4c. Contact portion 4f on the inner surface side of the contact with the second center fixed contact 9a disposed to face each other, and through the second movable contact 4, the second center fixed contact 9a and the second peripheral fixed contact. The signal 9b is brought into an electrically conducting state so that a signal is output.

At this time, the air remaining in the second accommodation hole 1b flows out through the connecting groove 1d to the other adjacent second accommodation hole 1b connected with the inversion of the second movable contact 4. Will be. For this reason, there is no possibility that the operation | movement at the time of inversion of the 2nd movable contact 4 may be impaired, and favorable inversion operation will be obtained.

Next, when the pressurization of the second sheet 5 is released from the above state, the second movable contact 4 is inverted upward by its own spring force, and by this inversion, the inner surface of the expansion projection 4c is inverted. The side contact part 4f is separated from the 2nd center fixed contact 9a, and the 2nd center fixed contact 9a and the 2nd peripheral fixed contact 9b are electrically disconnected, and it is turned off.

Fig. 9 shows a configuration of another embodiment of a push button switch using a sheet with movable contact, in which the second sheet 5 is formed of a substantially rectangular single sheet as in the first sheet 1 Although the 2nd sheet 5 was made into the common sheet so that it may be shown in FIG. 9, in the structure of a present Example, the 1st sheet 1 was made into the common sheet instead of this, and the 2nd sheet 5 Are formed into individual sheets 5A and 5B each composed of a plurality of small pieces, and the individual sheets 5A and 5B are individually used to first and second accommodation portions 1a and 1b of the first sheet 1. The first sheet (1) individually while the upper surfaces of the first and second movable contacts (3, 4) accommodated in the upper and lower surfaces of the first and second receiving holes (1a, 1b) are blocked. Will be attached to the upper surface side of the

Further, in the above embodiment, the connecting grooves 1c and 1d for air distribution are formed by communicating the first sheet 1 with the receiving holes 1a and 1b so as to penetrate up and down. Connecting groove 1c for air distribution by forming a non-adhesive part so that air can move between the 1st and 2nd accommodation holes 1a and 1b adjacent to the adhesion part 2 apply | coated on the back surface of the 1 sheet | seat 1 , 1d).

The rest of the configuration is the same as that of the above embodiment.

According to this embodiment of the present invention, the first sheet 1 has its thickness so that the first movable contact 3 is not lifted from the lower end of the first receiving hole 1a so as to expand the first movable contact 3. The second sheet (at the skirt portion 4b, which is formed at a thickness lower than the height of the projection portion 3c and at the same time does not interfere with the inversion operation of the second movable contact 4, is formed on the skirt portion 4b. Since the adhesive part 5a of 5) was formed in the thickness range which does not reach | attain, even in the flat insulation board 7 with no step | step difference between mutual contacts, such as the said printed board, mixed 1st and 2nd movable contacts Reliable conduction between (3, 4) and the first and second fixed contacts 8, 9 is obtained, and a good inversion operation is obtained.

Further, the first peripheral fixed contact 8b for contacting the seat with movable contact with the first and second movable contacts 3 and 4 in contact with the lower periphery edge portion 3a of the first movable contact 3 is provided. A first central fixed contact 8a facing the contact portion 3d of the dome-shaped expansion projection 3c of the first movable contact 3, and a lower peripheral portion 4a of the second movable contact 4; 2nd center fixed contact which opposes the 2nd peripheral fixed contact 9b which contact | connects the contact part 4e of the upper side, and the contact part 4f of the dome-shaped expansion protrusion 4c of the 2nd movable contact 4 By placing the contact 9a on the insulating substrate 7 on which the contacts 9a are disposed, the inner surfaces of the expansion protrusions 3c and 4c of the first and second movable contacts 3 and 4 are inverted by pressurization so that the contact portions 3d, 4f) simply mounts a switch having a plurality of types of first and second movable contacts with different strokes until the first and second central fixed contacts 8a, 9a come into contact with each other. It is possible to improve the assembly workability and to provide a push button switch which can be miniaturized while securing a desired stroke.

As described above, the sheet with movable contact of the present invention has a dome-shaped expansion projection and is placed on the peripheral fixed contact, and the pressurization operation inverts the inner surface of the expansion projection so as to contact with the central fixed contact to switch the contact. A stroke which has the same movable dome as the first movable contact made and is placed on the peripheral fixed contact at the same time as the dome-shaped expansion projected portion, and the inner surface of the expanded projection is inverted in a pressing operation than the first movable contact and contacts with the central fixed contact. Has a large second movable contact, a first sheet having a receiving hole for accommodating the first and second movable contacts, and has an adhesive portion on the back side to hold a part of the first and second movable contacts by the adhesive portion; And a second sheet for blocking the upper surface of the receiving hole of the first sheet, wherein the first and second movables are made by using either the first or the second sheet as a common sheet. When the first movable contact point and the second movable contact point are placed on the peripheral stationary contact point at the same time, the first projection contact and the second movable contact point are changed according to the stroke difference until the inner surface of the expansion projection is inverted by pressure and comes into contact with the center stationary contact point. By setting the thickness of the sheet to a constant thickness, the movable contact placed on the peripheral fixed contact by the thickness of the first sheet is adjusted by adjusting the height position to hold the second sheet of the first and second movable contacts. By adjusting the difference in the strokes between the inner surfaces of the expansion projections of the inflated protrusions by pressing and contacting the central fixed contact, a plurality of movable contacts having different strokes can be mixed in a common sheet, and mounting to the insulating substrate can be performed. Since it can be performed integrally, workability can be improved and cost can be reduced.

In addition, the first sheet is formed to have a thickness lower than the height of the outer surface of the expansion protrusion of the first movable contact so that the first movable contact does not float at the lower end of the receiving hole, and does not prevent the reversal operation of the second movable contact. Since it is formed in the thickness range which the adhesion part of a 2nd sheet | seat does not reach in the outer peripheral edge part of a 2nd movable contact, even if it is a flat switch board which does not have a step | step difference between mutual contacts, such as a printed board, Reliable conduction of the fixed contact is obtained, and a good inversion operation is obtained.

In addition, the first movable contact is formed of a reversible circular dome-shaped leaf spring, and the second movable contact is formed of a long length by cutting opposite one side surfaces of the lower periphery of the reversible circular dome-shaped leaf spring. By forming the narrow width portions facing each other even when the second movable contact having a larger stroke until the inner surface of the inflating protrusion is inverted by pressure than the first movable contact and is brought into contact with the center fixed contact is formed. Since the key pitch can be narrowed, the entire sheet can be miniaturized.

In addition, in the solution means which formed the 2nd sheet | seat with the sheet | seat color distinguishable from the exterior of a 2nd sheet the shape of the mounted movable contact, while changing the external shape of a 1st movable contact and a 2nd movable contact, Even after mounting on the inside, it is possible to easily identify the difference in the stroke of the movable contact with the naked eye from the outside, thereby preventing the wrong mounting.

Moreover, in the solving means which formed the 2nd sheet | seat into the one sheet | seat which covers the accommodation hole of a 1st sheet from above, and made the 2nd sheet into a common sheet | seat and mixed the 1st and 2nd movable contact point previously, a 1st sheet | seat Since it is possible to assemble by attaching the first sheet and the second movable contact to the pressure-sensitive adhesive of the second sheet from the lower side of the receiving hole, the assembly can be carried out efficiently.

Moreover, in the solution means which formed the 2nd sheet | seat into the several sheet | seat which covers the accommodation hole of a 1st sheet | seat separately from upper part, and uses a 1st sheet as a common sheet | seat and mixed 1st and 2nd movable contacts, Since the 2nd sheet | seat to hold | maintain only needs to have the area containing the attachment clearance part with respect to the 1st sheet | seat 1, it can form in small pieces and can reduce the sheet material to be used.

Moreover, in the solution which makes the appearance or color of a 2nd sheet | seat different according to the difference of the stroke of an individual movable contact, the difference of the stroke of the mounted movable contact can be visually identified easily, and it can prevent mismounting. do.

In addition, the seat with a movable contact in any one of the 1st-7th solving means, the 1st peripheral fixed contact on which the lower periphery of the 1st movable contact accommodated by the movable contact attached sheet is mounted, and a 1st peripheral fixed contact A first center fixed contact disposed adjacent to the top of the dome-shaped expansion protrusion of the first movable contact so as to be connected and detachably opposed thereto, and a second periphery on which the lower circumferential edge of the second movable contact is placed; A second central fixed contact disposed adjacent to the fixed contact and the second peripheral fixed contact, the lower surface of the top of the dome-shaped expansion protrusion of the second movable contact so as to be connectable and detachable, and the first and second peripherals; With the fixed contact point and the insulating substrate on which the first and second center fixed contact points are arranged, the inner surface of the expansion protrusion is inverted by pressing to contact the center fixed contact point. It is possible to easily mount a switch having a plurality of types of movable contacts having different strokes up to now, thereby improving assembly workability and providing a push button switch which can be miniaturized while securing a desired stroke. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a top view which shows the sheet | seat with a movable contact of this invention.

It is a principal part explanatory drawing which shows the accommodating hole part of the 2nd movable contact of the sheet | seat with a movable contact of this invention.

3 is a plan view showing a second movable contact of the present invention.

4 is a sectional view showing the main parts of a sheet with a movable contact according to the present invention.

FIG. 5 is a sectional view showing the principal parts of a line 5-5 of FIG. 4 of the present invention. FIG.

6 is a sectional view showing the principal parts of another embodiment of the sheet with a movable contact according to the present invention.

It is a principal part sectional drawing which shows the pushbutton switch using the sheet | seat with a movable contact of this invention.

8 is a sectional view showing the principal parts of a line 8-8 of FIG. 7 of the present invention.

Fig. 9 is a sectional view showing the principal parts of another embodiment of a push button switch using the sheet with movable contact according to the present invention.

10 is an exploded perspective view showing a conventional movable contact-attached sheet.

11 is a sectional view showing the principal parts of a pushbutton switch using a conventional sheet with movable contact.

Explanation of symbols on main parts of drawing

1: 1st sheet 1a: 1st accommodating part

1b: 2nd accommodating part 1c: connection groove

1d: connecting groove 2: adhesive

3: 1st movable contact 3a: lower peripheral part

3b: skirt portion 3c: expansion projection portion

3d: contact section 4: second movable contact

4a: lower perimeter edge 4b: skirt portion

4c: expansion projection 4d: opening

4e: contact portion 4f: contact portion

5: 2nd sheet 5a: adhesion part

5A: Individual Sheet 5B: Individual Sheet

6: peeling sheet 6a: hole

7: insulated substrate 8: first fixed contact

8a: first center fixed contact 8b: first peripheral fixed contact

9: second fixed contact 9a: second center fixed contact

9b: second peripheral fixed contact

Claims (8)

A movable contact having a dome-shaped expansion protrusion is placed on a peripheral fixed contact formed on the insulating substrate, and the pressurization operation inverts the expansion protrusion of the movable contact so that the inner contact portion contacts the central fixed contact formed on the insulating substrate. A switch component for use in a push button switch that moves a predetermined stroke of a switch and switches electrical conduction between a central fixed contact and a peripheral fixed contact through its movable contact, wherein the plurality of movable contacts are held on a common sheet to provide the insulating substrate. A sheet with a movable contact made stackable on a surface, wherein the movable contact has a first movable contact and a second movable contact having a larger stroke than the first movable contact, and the sheet is movable between the first and the second movable contact. A first sheet having an accommodating hole for accommodating a contact, and having an adhesive portion on a back surface thereof, whereby the first and second A second sheet is provided to hold a part of the contact and close the upper surface of the receiving hole of the first sheet, and the thickness of the first sheet is constant according to the stroke difference between the first movable contact and the second movable contact. By setting it to thickness, the height position hold | maintained in the said 2nd sheet | seat of the said 1st and 2nd movable contact was adjusted, The sheet with a movable contact characterized by the above-mentioned. The second sheet of claim 1, wherein the first sheet is formed to have a thickness lower than a height of an outer surface of the expansion protrusion of the first movable contact so that the first movable contact is not lifted from the lower end of the receiving hole. A sheet with a movable contact, wherein the sheet is formed in a thickness range such that the adhesive portion of the second sheet does not reach the outer peripheral edge portion of the second movable contact so as not to interfere with the inversion operation of the movable contact. 3. The first movable contact of claim 1 or 2, wherein the first movable contact is formed of a reversible circular dome-shaped leaf spring, and the second movable contact is opposite one end portion of the lower periphery of the reversible circular dome-shaped leaf spring. Sheets with movable contacts, characterized in that both sides of the cutout are formed in a long shape. The method according to claim 1 or 2, wherein the shape of the mounted movable contact is different from that of the first movable contact and the second movable contact, and the shape of the mounted movable contact is determined by the color of the sheet that is discernible from the outside of the second sheet. The sheet | seat with a movable contact characterized by the above-mentioned. The said 2nd sheet | seat is formed from one sheet | seat which covers the accommodating hole of the said 1st sheet from upper direction, The said 1st and 2nd movable contact of Claim 1 or 2 using said 2nd sheet as a common sheet | seat. Movable contact sheet, characterized in that the mixture. The said 2nd sheet | seat is formed in multiple sheets which cover the accommodation hole of the said 1st sheet | seat individually from the upper side, The said 1st sheet | seat and the 2nd sheet | seat as said 1st sheet | seat as a common sheet | seat in Claim 1 or 2 Movable contact sheet, characterized in that the movable contact is mixed. 7. The sheet with movable contact according to claim 6, wherein the outer shape or color of the second sheet is changed in accordance with the difference in strokes of the individual movable contacts. The seat with a movable contact of Claim 1 or 2, the 1st peripheral fixed contact in which the lower periphery of the said 1st movable contact accommodated in this movable contact attached sheet is mounted, and this 1st peripheral fixed contact adjoining. A first center fixed contact disposed so that the inner surface of the top of the dome-shaped expansion protrusion of the first movable contact is detachably opposed to each other, and a second periphery on which the lower circumferential edge of the second movable contact is placed. A second central fixed contact disposed adjacent to the fixed contact, the inner peripheral surface of the top of the dome-shaped expansion protrusion of the second movable contact so as to be connectable and detachable, and the first section. And a second peripheral fixed contact, and an insulating substrate on which the first and second center fixed contacts are disposed.