JP2000113762A - Illuminated push-button switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illuminated push-button switch capable of uniformly illuminating all the push-button switch members and enabling a display part to be seen clearly, if its size is reduced by reducing the power consumption in it and reducing the capacity of a battery pack, etc., and of reducing the manufacturing costs including circuit board design. SOLUTION: This push-button switch is provided with a push-button switch cover member 3, which is equipped with a key top member 2 formed on its upper surface side and having a transparent colored layer 11 with a display part 1 and a shading layer 12 and equipped with a press part 4 and a base part 41 formed on its lower surface side, and a base film 6 equipped with a window hole part made by removing a portion of fixed contacts 9 provided on a circuit board 8. The base film 6 is put on the circuit board 8 while a metallic disc spring 5 is placed above the fixed contacts and fixed there by sticking the periphery of the metallic disc spring 5 to the base film 5 with a surface light emitting sheet 7, and the surface light emitting sheet 7 is pressed and fixed by the base part 41 of the push-button switch cover member 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminated push-button switch used for a mobile communication device such as a portable telephone or an automobile telephone, a measuring device, a remote controller, a data input device such as a handy terminal, a switch device and the like. is there.

[0002]

2. Description of the Related Art Conventionally, in an illuminated push button switch used for an input device such as a portable telephone, a cover member a for a push button switch is assembled with a circuit board b and housed in a case as shown in FIG. A push button switch is constituted by the switch cover member a and the circuit board b. Such push button switches, a plurality of key top portion a ₁ to display a ₂ is formed on the top surface of characters and symbols on the surface,
Further, the contact portion c corresponding to the key top a ₁ on the back surface
Have contact portions c by the pressing operation of the key top portion a ₁
Contacts the contacts of the circuit board b directly or indirectly via metal disc springs d, resin disc springs and the like to open and close the circuit, but a light source e such as an LED is provided below the push button switch cover member a. a number, for example, place a 10 to 15 degree to the circuit board b, at the time of pressing operation, the display unit a ₂ of the key top portion a ₁ by the light source e to irradiation is performed to facilitate the viewing ing.

[0003]

However, in the above-mentioned conventional illuminated push button switch, it is difficult to uniformly illuminate the display portions on the top surfaces of all the key top portions.
Irradiation unevenness and brightness unevenness are inevitable, and many LEDs
There is a problem that the power consumption increases because the LEDs are turned on at the same time, and it can be considered that eliminating the illumination unevenness and the brightness unevenness can be solved by turning on the LED of higher brightness, but then the power consumption further increases However, the use time of a device such as a cellular phone is shortened, and a large capacity battery pack is indispensable, which causes a new problem that the weight of the device increases. Furthermore, since many of these LEDs are incorporated into a circuit board, there are many drawbacks in the circuit design of the circuit board, which increases the design time, and the cost of assembling on the circuit board is also expensive. there were. The present invention is intended to solve these conventional drawbacks, and even if the power consumption is reduced, the battery pack and the like are reduced in capacity and the size is reduced, the entire cover member for the push button switch can be uniformly illuminated. Since the display unit can be clearly seen, and the thin surface emitting sheet is used, the entire switch device can be made thin. Since there is no need to mount LEDs etc. on the circuit board, the manufacturing cost including the design of the circuit board is reduced. Accordingly, it is an object of the present invention to provide an illuminated push button switch which can sufficiently satisfy the demand for cost reduction.

[0004]

To achieve the above object, an illuminated push button switch according to the first aspect of the present invention has a key top portion having a display portion formed on a front surface side, and a key top portion having a display portion. A cover member for a push button switch having a base portion formed on the back side, and a base film provided with a window hole except for a portion of the fixed contact provided on the circuit board are provided, and the base film is provided on the circuit board. At the same time, a metal disc spring is placed above the fixed contact, and the outer peripheral edge of the metal disc spring is fixed by bonding it to a base film with a surface light emitting sheet, and the surface light emitting sheet is covered with the cover for the push button switch. It is formed by pressing and fixing at the base of the member.

According to a second aspect of the present invention, there is provided an illuminated push button switch, wherein a key top body having a display portion is adhered to a front surface side, and a pressing portion and a base portion are formed on a rear surface side. A resin sheet having a dome-shaped flexible disc spring formed above the fixed contact provided on the circuit board is provided on the circuit board, and a conductive movable contact is provided on the inner surface of the flexible disc spring. A surface light-emitting sheet having a window hole facing the outer periphery of a flexible disc spring is adhered onto the resin sheet, and the surface light-emitting sheet is pressed and fixed by a base portion of the cover member for the push button switch.

The illuminated push button switch according to the third and fourth aspects comprises an upper sheet having a key top portion formed on the front side, and a lower sheet having a pressing section formed on the back side. A surface light-emitting sheet disposed entirely between the two sheets of the lower sheet or only the portion of the key top portion, and a cover member for a push button switch having a light-transmitting colored layer and a light-shielding layer having a display portion; Bonding a circuit board provided corresponding to the lower layer sheet and a base film provided with a window hole except for a portion of the fixed contact provided on the circuit board, and a metal above the fixed contact. A disc spring is placed on the base plate, and the outer peripheral edge of the disc spring is fixed to the base film with a fixing sheet, and a pressing portion of the lower sheet is applied to the metal disc spring. By those formed of a fixed cover member for a push button switch on a circuit board.

According to a fifth aspect of the present invention, there is provided an illuminated push-button switch, wherein a display portion is formed on a front surface side, and a key top portion having a pressing portion having a movable contact formed on a rear surface side includes:
A surface light emitting device having a cover member for a push button switch provided on a base portion via a dome-shaped portion, and having a window hole portion opposed to the movable contact and excluding a portion of a fixed contact provided on a circuit board. A sheet is provided on the back side of the cover member for the push button switch, and the cover member for the push button switch is adhered to the circuit board via the surface light emitting sheet.

[0008]

According to the illuminated push-button switch of the present invention, the device itself can be made thinner by using a thin sheet-like illuminating light source, and the entire sheet emits light, so that the entire push-button switch member is uniformly illuminated. The display section has no light unevenness and has a high quality feeling. In addition, LED as before
It is not necessary to assemble the battery pack etc. because it is not necessary to assemble it on the circuit board, so that the manufacturing cost including the design of the circuit board can be reduced, and the entire sheet emits light with low power, which reduces power consumption. The capacity can be reduced and the size can be reduced.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an illuminated push-button switch according to a first embodiment of the present invention, in which a key-top member 2 having a display portion 1 as a symbol such as a character or a code is formed on the surface side, and a pressing portion 4 is formed. the base portion 4 ₁ and the cover member for push button switch 3 formed on the back side, and a base film 6 having a window hole portion excluding the portion of the fixed contact 9 provided on the circuit board 8 is provided, said base The film 6 is placed on the circuit board 8, and the metal disc spring 5 is placed on the base film 6 above the fixed contact 9, and the outer periphery of the metal disc spring is placed on the base film 6 with the surface emitting sheet 7. fixed by bonding, made of the configuration of said surface light-emitting sheet 7 was pressed and fixed by the base portion 4 ₁ of the pushbutton switch cover member 3. The surface light-emitting sheet 7 causes a phenomenon of emitting fluorescence when a light-emitting substance such as zinc sulfide is injected between the films provided with electrodes and a voltage is applied, and is called a so-called EL (electroluminescence) sheet. Is what it is. This illuminated push button switch is
As shown in FIG. 1, a metal disc spring 5 serving as a movable contact portion is assembled below the pressing portion 4 of the push button switch cover member 3 so as to face the fixed contact 9 on the circuit board 8, The metal disk spring 5 installed on the base film 6 is fixed by the surface light-emitting sheet 7, and the surface light-emitting sheet 7 may be fixed so as to cover the entire metal disk spring 5. In order not to impair the clicking sensation of 5 and the feeling at the time of pressing, it is preferable to fix the metal disc spring 5 with the dome-shaped portion removed.

[0010] or the display portion 1 of the cover member for push button switch 3, display unit 1 such as open symbols on the top surface of the key top portion 2 of a translucent colored layer 1 ₁ and the light-shielding layer 1 ₂ is formed Alternatively, although not shown, a display unit 1 such as a symbol is formed by a method such as printing.

In the second embodiment, as shown in FIG.
Display unit 1 comprising a light-transmitting colored layer 1 ₁ and the light-shielding layer 1 ₂ which,
Alternatively, the key top portion 2 attached to the surface side, and the pressing portion 4 and the base portion 4 ₁ and the cover member for push button switch 3 formed on the back surface side is not shown having a display unit such as a symbol is printed And a fixed contact 9 provided on a circuit board 8
Of the resin sheet 5 ₂ formed with flexible disc spring 5 ₁ domed upward are provided on the circuit board 8. And with each other by the provided conductive contacts ₃ on the back surface of the dome-shaped portion, the resin sheet 5 except dome-shaped portion of the flexible disc springs 5 ₁
While the surface emitting sheet 7 on ₂ is provided, said surface-emitting sheet 7, dome-shaped portion of the flexible disc spring 5 ₁ also pressing load increases Covering, since the click feeling is impaired, dome It is good to make the shape part removed.

A cover for a push button switch shown in FIG.
In the third embodiment, the material 13 has the key top portion 12 on the surface.
The upper layer sheet 11 formed on the side and the pressing portion 14 are
And the lower sheet 15 formed.
And a surface emitting sheet 17 between both sheets of the lower sheet 15 and
Light-transmitting colored layer 16 and light-shielding layer 16 with display unit 10
₁And a push button switch member 13 is interposed and provided.
However, the surface light-emitting sheet 17 may be an upper layer sheet 11 or
It may be bonded to the lower sheet 15. In addition,
The indicator 10 is provided on the back surface of the key top as in the case of FIG.
It may be provided on the top of the key top as shown in FIG.
Is also good. In this case, the light shielding layer 16₁Is the display unit 10
Only the part corresponding to is perforated. In addition, this push button switch
Circuit board 18 on which switch cover member 13 is mounted
Is a window hole excluding the fixed contact 19 as in the example of FIG.
Base film 26 having a fixed portion 19
Spring 25 is placed on the base film 26
Then, the outer peripheral edge of the metal disc spring is fixed to the fixing sheet 25.₁With adhesive
The metal disc spring 25 is replaced with the metal disc spring 25 shown in FIG.
Dome-shaped flexible disc spring 5₁Formed resin
Port 5₂May be provided.

In the example shown in FIG. 3, the light emitting portion of the surface issuing sheet 17 is provided on the entire surface of the cover member 13 for the push button switch. However, as in the fourth embodiment shown in FIGS. Are formed only in the portion corresponding to the key top portion 12, and only the portion to be illuminated is illuminated by the surface light emitting sheet 17. That is, the light emitting section 1 corresponding to the key top section 12 in the surface light emitting sheet 17
7 ₁ have been connected to the circuit, the connected to the circuit board 18 via the electrodes 17 _2, key is pressed the top portion 12
Only the circuit is illuminated by control of the circuit board. By doing so, the luminescent material of the surface light-emitting sheet 17 may be provided only in the key top portion with a limited amount of use, so that the manufacturing cost can be reduced, and when the push button switch is pressed, the pressed key top portion is pressed. Only the key-top portion 12 is illuminated, so that the pressed key-top portion 12 can be distinguished and confirmed, so that the key-top portion 12 can be easily mis-pressed during use, and only the pressed key-top portion 12 emits light. In addition, the power consumption can be suppressed, which can contribute to a reduction in the capacity of the battery pack and the like.

[0014] In the fifth embodiment of FIG. 6, to form a display unit 21 such as a symbol on the surface side of the key top member 22, also key top portion a pressing portion 24 formed on the back side with a moving contact 24 ₁ 22, the dome-shaped portion 22 ₁ through the base portion 22 ₂ pushbutton switch cover member 2 provided
3 which was used, there are fixed contacts 29 provided on the circuit board 28 to face the movable contact 24 _1, the base portion 22 of the circuit board 28 and the cover member for push button switch 23 with the fixed contact 29 ₂ and the surface emitting sheet 27
Is provided. Display unit 21 is shaped similarly to FIG. 1, also the surface emission sheet 27 is preferably set to a state of far the dome-shaped portion 22 ₁ of the pushbutton switch cover member 23.

The cover member for the push button switch, the base portion of the upper layer sheet, and the lower layer sheet shown in the figure may be made of a translucent elastic rubber or a thermoplastic elastomer such as urethane. Considering the properties, processability, weather resistance, etc., silicone rubber is preferred.

The key top portion is made of acrylic, urethane, methacrylic, polyester, polycarbonate, dimethylphenylsilicone or the like, and has a translucency and high transparency of 40 to 80 degrees in Shore D hardness. It is desirable to use a high hardness resin. The high-hardness resin used as the key top portion needs to be bonded and integrated with the elastic material of the cover member for the push button switch, for example, silicone rubber. In addition, as a resin that can ensure translucency and does not turn yellow upon heating, for example, a vinyl monomer as a curing agent and an adhesion imparting agent to a polyester resin of a thermosetting resin, for imparting mechanical strength improvement and shrinkage prevention functions It is more preferable to select a resin appropriately mixed with an epoxy resin or the like.

The display section is provided on at least one surface of the top surface of the key top portion, the back bottom surface of the key top portion, the upper sheet, and the lower sheet. The display portion is formed by printing directly at the predetermined position as described above using a light-shielding paint or light-shielding ink, or by forming a light-shielding colored layer once by painting or printing, and then performing laser processing. It is formed by etching a part of the light-shielding colored layer into a shape such as a character by the method described above. In this case, a light-transmitting colored layer may be formed beforehand under the light-shielding colored layer by printing or the like. Alternatively, a printing sheet printed in advance may be bonded to the top surface of the key top section with a transparent adhesive or the like to form a display section. When the display portion is formed by printing, for example, a so-called transfer printing method using a flexible plastic film as a carrier may be used.

[0018]

Embodiments of the present invention will be described below. Example 1 A silicone rubber composition KE-1915 (manufactured by Shin-Etsu Chemical Co., Ltd.) was compression-molded with a molding die to form a cover material for a pushbutton switch having a key top portion. Next, solid printing is performed on the top surface of the key top portion using a silicone-based translucent coloring paint to form a translucent coloring layer. The top portion of the key top portion of the light-shielding layer was removed by a conventionally known laser processing machine to form a display portion, thereby forming a cover member for a push button switch. Next, a metal dome-shaped disc spring (metal disc spring) made of a thin metal (0.1 mm thick bery copper) by press molding and forming a window hole (φ4.5 mm). On a base film (transparent PET film with a thickness of 50 μm) with its top facing upward, and holding and fixing the peripheral edge and the base film with a surface emitting sheet with an adhesive, which are used as fixed contacts of a circuit board. The cover member for the push button switch was set so that the pressing portion corresponded to the top portion of the metal disc spring, and the base portion corresponded to the surface light emitting sheet. The metal dish spring and the cover member for the push button switch installed on the circuit board were assembled in a case (not shown), and when the power was turned on, all the display sections were clearly illuminated without unevenness and could be visually recognized well.

Example 2 A light-shielding layer of a symbol was formed by screen printing using a light-shielding ink on the back side of a key top body obtained by injection molding a transparent acrylic resin. Similarly, solid printing was performed using a light-transmitting ink to form a light-transmitting colored layer, thereby completing a display portion. Further, an elastic sheet having a base portion and a pressing portion was molded using silicone rubber compound KE-951U (manufactured by Shin-Etsu Chemical Co., Ltd.).
The key top body was bonded onto the pressing portion of the elastic sheet with a silicone adhesive to obtain a cover member for a push button switch. Next, a plurality of contacts are printed and formed on a polyethylene terephthalate (PET) sheet, which is a resin sheet, by screen printing using a carbon-based conductive ink. A flexible disc spring with a dome-shaped portion bulging upward on the opposite side was formed. Next, a surface emitting sheet with an adhesive obtained by removing the dome-shaped portion of the flexible disc spring into a window hole shape was bonded to the resin sheet. This flexible disc spring is positioned and fixed to the fixed contact of the circuit board, and the pressing portion of the cover member for the push button switch corresponds to the top of the flexible disc spring, and the pressing portion corresponds to the surface emitting sheet. It was set up to do. The flexible disc spring and the cover member for the push button switch installed on the circuit board were assembled in a case, and when the power was turned on, all the display portions were clearly illuminated without unevenness and could be visually recognized well.
In this case, by forming a dome-shaped flexible disc spring using white PET, the light of the surface light emitting sheet is reflected by the white PET, and the light illuminates the key top portion more effectively. Was completed.

Example 3 A thermosetting liquid acrylic resin (commercially available) was filled into a key-top portion forming engraved portion of a heated mold, and was heated and cured to form a transparent key-top portion. Also, the silicone rubber compound KE-941U (manufactured by Shin-Etsu Chemical Co., Ltd.) is filled in the same mold as the one in which the key top portion is formed, and the transparent key top portion and the elastic sheet portion are integrated by pressing and heating. Was. Next, using a silicone-based light-shielding colored paint, a light-shielding layer of a blank symbol is formed on the back surface of the elastic sheet portion by screen printing, and further, a silicone-based light-transmitting coloring material is sufficiently covered to cover the blank symbol portion. To obtain an upper layer sheet. Using the silicone rubber raw material used for producing the elastic sheet portion, a lower layer sheet having a pressing portion was similarly formed. When the lower sheet is colored white or the like having high light reflection efficiency, light can be guided to the upper sheet more effectively. The upper sheet and the lower sheet were adhered so that the key top portion and the pressing portion corresponded to each other via a surface emitting sheet having an adhesive applied to both surfaces. As the contact portion, a metal disc spring as a fixing film with an adhesive was used instead of the surface emitting sheet with an adhesive of Example 1. Needless to say, this contact portion may use a dome-shaped flexible disc spring obtained by expanding a part of the resin sheet used in the second embodiment. The metal disc spring was positioned and installed on the fixed contact of the circuit board, and the cover member for the push button switch was installed so that the pressing portion corresponded to the top of the metal disc spring. When the metal plate spring and the cover member for the push button switch installed on the circuit board were assembled in the case, and all the display portions were illuminated clearly and without unevenness when the power was turned on, they could be visually recognized well.

Embodiment 4 An upper layer sheet having a key top portion and a lower layer sheet having a pressing portion are formed in the same manner as in Example 3, and only a portion corresponding to the key top portion emits light between the upper and lower layer sheets. A cover member for a push button switch was formed by bonding and interposing a surface emitting sheet. In addition, a key top portion selected when the cover member for the push button switch is installed on the circuit board provided with the metal disc spring and the fixed contact so that the pressing portion corresponds to the top of the metal disc spring and incorporated in the case and the power is turned on is selected. When the key was pressed, only the pressed key top portion was illuminated by the light emitting portion of the surface light emitting sheet, the identification was easy to confirm, the device was used without wasting power consumption, and the display portion could be visually recognized well.

Example 5 A silicone rubber composition KE-1915 (manufactured by Shin-Etsu Chemical Co., Ltd.) was compression-molded in a molding die, and a key top portion, a dome portion, a base portion, and a pressing portion were formed. A cover member for a push button switch having a movable contact provided on the pressing portion with silicone conductive ink was molded. Next, a display portion such as a symbol was printed on the top surface of the cover member for a push button switch using a silicone-based colored paint to complete the cover member for a push button switch. Align the fixed contact on the circuit board with the surface light-emitting sheet that has been pulled out of the window hole except for the fixed contact part, install it on the circuit board, and press the cover member for the push button switch with the pressing part corresponding to the fixed contact It was set up to do. When the surface light-emitting sheet and the cover member for the push button switch mounted on the circuit board were assembled into a case, and when the power was turned on, all the key tops were illuminated clearly and evenly, and the display section could be visually recognized well.

[0023]

As described above, according to the illuminated pushbutton switch according to the present invention, the power consumption can be reduced, and even if the battery pack or the like is reduced in capacity and miniaturized, the entire pushbutton switch member becomes uneven. It is possible to illuminate the display unit clearly, and the display unit can be clearly seen. Moreover, since a thin surface emitting sheet is used, LEDs and the like are not assembled on the circuit board. It is possible to reduce the manufacturing cost including the above.

[Brief description of the drawings]

FIG. 1 is an enlarged vertical sectional view of a part of an illuminated push button switch according to a first embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of a part of an illuminated push button switch according to a second embodiment of the present invention.

FIG. 3 is an enlarged vertical sectional view of a part of an illuminated push button switch according to a third embodiment of the present invention;

FIG. 4 is an enlarged vertical sectional view of a part of an illuminated push-button switch according to a fourth embodiment of the present invention;

5 is an overall plan view of the example of FIG. 4 in a state of use along line AA.

FIG. 6 is an enlarged vertical sectional view of a part of an illuminated pushbutton switch according to a fifth embodiment of the present invention.

FIG. 7 is an enlarged vertical sectional view of a part of a conventional illuminated push button switch.

[Explanation of Signs] 1 Display section 1 ₁ Translucent colored layer 1 ₂ Light-shielding layer ₂ , 12, 22 Key top section 3, 13, 23 Push button switch cover member 4, _14, 24 Press section 4 ₁ Base section 5 Metal disc spring 5 ₁ Flexible disc spring 5 ₂ Resin sheet 5 ₃ Conductive contact 6 Base film 7, 17, 27 Surface emitting sheet 8, 18, 28 Circuit board 9, 19, 29 Fixed contact 11 Upper sheet 15 Lower sheet Reference Signs List 16 translucent colored layer 16 ₁ light-shielding layer 17 ₁ light emitting section 17 ₂ electrode 22 ₁ dome-shaped section 24 ₁ movable contact 25 ₁ fixing sheet 26 base film

Claims (5)

[Claims] 1. A cover member for a push button switch in which a key top portion having a display portion is formed on a front surface side and a pressing portion and a base portion are formed on a back surface side, and a portion of a fixed contact provided on a circuit board. A base film provided with a window hole excluding the above, a base film is set on the circuit board, a metal disc spring is placed above the fixed contact, and the outer peripheral edge of the metal disc spring is surface-emitting. An illuminated push button switch comprising a sheet, which is fixed by being adhered to a base film, and wherein the surface emitting sheet is pressed and fixed by a base portion of the cover member for the push button switch. 2. A cover member for a push button switch in which a key top body having a display portion is adhered to a front surface side and a pressing portion and a base portion are formed on a back surface side, and above a fixed contact provided on a circuit board. A resin sheet on which a dome-shaped flexible disc spring is formed is provided on a circuit board, a conductive movable contact is provided on an inner surface of the flexible disc spring, and a window hole facing an outer peripheral edge of the flexible disc spring is provided. An illuminated pushbutton switch comprising a surface light-emitting sheet having the surface light-emitting sheet adhered to the resin sheet, and the surface light-emitting sheet pressed and fixed by a base portion of the cover member for the pushbutton switch. 3. An upper sheet having a key top portion formed on a front surface side and a lower sheet having a pressing portion formed on a back surface side, a surface light emitting sheet between the upper sheet and the lower sheet, and a light-transmitting sheet. A cover member for a push button switch is configured by interposing a conductive coloring layer and a light shielding layer, and a circuit board provided corresponding to the lower layer sheet and a fixed contact portion provided on the circuit board are removed. Affixing a base film provided with a window hole, a metal disc spring is placed above the fixed contact, and the metal disc spring outer peripheral edge is fixed by adhering to the base film with a fixing sheet, An illuminated push-button switch, wherein the cover member for the push-button switch is fixed on a circuit board so that a pressing portion of the lower sheet abuts on the metal disc spring. 4. An upper sheet having a key top portion formed on the front surface side and a lower layer sheet having a pressing portion formed on the back surface side, wherein the upper portion sheet corresponds to the key top portion between the upper sheet and the lower layer sheet. A surface light-emitting sheet formed by forming a light-transmitting colored layer and a light-shielding layer having a display portion interposed therebetween to form a cover member for a push button switch, and a circuit board provided corresponding to the lower sheet. Bonding a base film provided with a window hole except for a portion of the fixed contact provided on the circuit board, and placing a metal disc spring above the fixed contact; The cover member for the push button switch is fixed on the circuit board so that the fixing portion is fixed by adhering onto the base film with the fixing sheet, and the pressing portion of the lower layer sheet is brought into contact with the metal disc spring. Illuminated pushbutton switch. 5. A key top portion having a display portion formed on the front surface side and a pressing portion having a movable contact formed on the rear surface side is provided with a cover member for a push button switch provided on a base portion via a dome-shaped portion. A surface light-emitting sheet having a window hole except for a portion of the fixed contact provided on the circuit board is provided on the back surface of the cover for the push button switch, and the surface light-emitting sheet is provided. An illuminated push-button switch in which the cover member for the push-button switch is adhered to a circuit board via an adhesive.