JP3410633B2 - Method of manufacturing a pressing member for an illuminated push button switch - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a pressing member for an illuminated push button switch used as a component in a data input device such as a mobile communication device, and more particularly to a translucent substrate having a key top portion. Laminate a colored layer and a light-shielding colored layer,
A pressing member for forming a code or the like on the top surface of the key top part by removing the light-shielding colored layer with a laser, and further forming the light-shielding coloring layer or the light-transmitting coloring layer formed in a sheet shape in advance by a mold device. The present invention relates to a manufacturing method for manufacturing a pressing member by pressurizing and shaping, and fixing a substrate to the shaped colored layer.

[0002]

2. Description of the Related Art Illuminated data input devices (push button switches) are used in mobile communication devices and the like in consideration of use at night. Generally, such data entry devices
The circuit board is constructed by directly assembling the pressing member, and the circuit board is provided with a fixed contact and a light-emitting body such as an LED, and the pressing member is formed of a translucent substrate having a key top portion. A laminate in which a light-colored coloring layer and a light-shielding colored layer are stacked and the light-shielding colored layer on the top surface of the key top portion is removed by a laser or the like to form a code is used.

As a method of manufacturing the above-mentioned pressing member, a method described in Japanese Patent Application Laid-Open No. 6-44855 is known. In this Japanese Laid-Open Patent Publication No. 6-44855, a vulcanized light-shielding silicone rubber sheet and an unvulcanized light-shielding silicone rubber sheet are laminated by calendering or the like, and the laminated silicone rubber sheet is used as an engraving mold. Place on top, press and heat with a light-shielding part forming die to form a light-shielding colored layer, then drop colored liquid silicone rubber on the laminated sheet on the bottom of the engraving part of the engraving die, and use this silicone A rubber is heated to form a translucent colored layer, and a silicone rubber composition which has been formed into a sheet shape in advance is placed on an engraving mold, and pressed and heated by a base forming mold to form each layer. Mold a monolithic substrate, then
Described is a manufacturing method in which a light-shielding colored layer is removed by a laser to form a display portion such as characters.

[0004]

However, in the manufacturing method described in JP-A-6-44855, the vulcanized light-shielding silicone rubber sheet and the unvulcanized light-shielding silicone rubber sheet are laminated. Since the light-shielding colored layer is formed in this manner, the thickness of the light-shielding colored layer is large, which requires a considerable amount of time to form the display portion with a laser, resulting in a reduction in production efficiency. However, there is a problem in that the visibility, especially from an oblique direction, is reduced, and the engraving depth of the display portion is deepened, so that the feel of the finger is impaired. The present invention has been made in view of the above problems, and an object of the present invention is to provide a manufacturing method capable of forming a light-shielding colored layer thinly, excellent in visibility and touch of a display portion, and capable of efficient production. .

[0005]

In order to achieve the above object, the invention according to claim 1 is formed with a base body in which a key top portion bulges from the base portion to the surface side and the entire surface of the base body. A light-shielding colored resin composition on a carrier film, comprising: a light-shielding colored layer; and a display part obtained by removing the light-shielding colored layer into a character / symbol shape. A light-shielding colored layer is laminated to form a sheet-like product, and the sheet-like product is formed into an engraving die in which an engraving recess corresponding to the key top portion is formed. Placed in a state of facing the opening surface, after pressing the sheet-shaped article with a light-shielding layer molding die to shape the sheet-shaped article, peel the carrier film from the shaped sheet-shaped article, Next, it is a A vulcanized rubber composition is placed on the engraved recess opening surface of the engraving die, and the unvulcanized rubber composition is pressed by a substrate forming die to form a substrate on the light-shielding colored layer, and then the engraving is performed. The display is formed by removing from the mold and removing the light-shielding colored layer with a laser.

In the invention according to claim 1, the pressing member for the illuminated push-button switch has a light-transmitting colored layer between the base and the light-shielding colored layer, and before the base is molded. A transparent colored layer is laminated on the carrier film with a transparent colored resin composition to prepare a second sheet-like product, and the second sheet-like product is provided on the opening surface of the engraved recess of the engraving die. After the light-transmitting colored layer is placed in a state of facing the engraved recess opening, the second sheet-like material is pressed by a light-transmitting layer forming die to be superimposed and shaped on the light-shielding colored layer. And a light-shielding colored layer, which is embodied in a mode (claim 2) of peeling the carrier film from the shaped second sheet and molding the substrate on the transparent colored layer. The translucent colored layer and the unvulcanized rubber composition are vulcanized and cured immediately after shaping. Like, for example, pressurized by the mold, the embodiment is heated, or configured manner to vulcanized together with the light-shielding colored layer and the translucent colored layer unvulcanized rubber composition after shaping.

According to a third aspect of the present invention, a base body in which a key top portion bulges from the base portion to the front surface side and a translucent ceiling formed on at least a part of the top surface of the key top portion are laminated. Illuminated push-button switch including a surface coloring layer, a light-shielding coloring layer formed on the entire surface of the top surface and the substrate, and a display section formed by removing the light-shielding coloring layer into a character / symbol shape. In the production method for producing a pressing member for use in manufacturing, a sheet-like material is produced by laminating a light-shielding colored layer with a light-shielding colored resin composition on a carrier film,
The light-shielding colored layer is placed on an engraving die in which an engraving recess corresponding to the key top portion is formed in a state of facing the opening surface of the engraving recess, and the sheet-like material is formed by a light-shielding layer forming die. After pressurizing and heating to vulcanize the light-shielding colored layer and peeling off the carrier film from the vulcanized and cured light-shielding colored layer, on the light-shielding colored layer on the bottom surface of the engraving recess of the engraving die. A translucent colored resin composition having fluidity is placed, and the translucent colored resin composition is pressed and heated by a mold to heat at least a part of the light-shielding colored layer on the bottom surface of the engraved concave portion to the top surface. A colored layer is molded, and then an unvulcanized rubber composition formed into a substantially sheet shape is placed on the engraved recess opening surface of the engraved mold, and the unvulcanized rubber composition is molded by a substrate molding die. Pressurize and heat to adhere to the translucent colored layer Removed from the engraved mold after molding the substrate to form the display portion of the light-shielding colored layer is removed by laser.

According to a third aspect of the invention, the pressing member for the illuminated push-button switch has a light-transmitting colored layer between the base and the light-shielding colored layer, and before the base is molded. And a translucent colored layer is laminated and formed on the carrier film with a translucent colored resin composition to prepare a second sheet-like product, and the second sheet-like product is formed on the engraved recess opening surface of the engraving die. Is placed in a state where the translucent colored layer faces the opening of the engraved recess, and the second sheet-like material is pressed and heated by a translucent layer molding die to vulcanize the translucent colored layer. Then, the carrier film is peeled off after being laminated and formed on the light-shielding colored layer and the top colored layer, and the substrate is fixed to the light-transmitting colored layer to be molded (claim 4). To be done.

The illuminated push button switch pressing member is assembled to the circuit board and constitutes an illuminated push button switch together with the circuit board. This pressing member is generally a base body in which at least one key top portion bulges from a base portion through a thin skirt portion, and a translucent surface formed on the entire surface of the base body (the bulging side surface of the key top portion). Transparent colored layer, a top colored layer formed on the translucent colored layer on the top surface of the key top part, a light shielding colored layer laminated on the translucent colored layer and the top colored layer, and a key top part top Although it has a display part formed by forming a light-shielding colored layer such as a surface in the shape of a letter or the like, the formation of the light-transmitting colored layer or the top surface colored layer is omitted depending on the type of the illuminated pushbutton switch. .

The light-shielding colored layer is formed by placing a sheet-like material on an engraving die and pressing the sheet-like material between the engraving die and the light-shielding layer forming die. The sheet-like material is produced by calendar molding or the like, and the carrier film is a thermoplastic resin sheet such as polyethylene terephthalate having a thickness of 25 to 50 μm, and preferably the surface is subjected to a release treatment with a fluorine compound such as tetrafluoroethylene. An unvulcanized resin sheet containing a resin binder mixed with a pigment and a cross-linking agent is used. In this light-shielding colored resin composition, a resin binder such as a silicone-based resin composition is used, and a pigment such as carbon black having excellent laser light absorption is used.

In the engraving die, the engraving concave portion corresponds to the key top portion and shapes the surface shape of the pressing member. The light-shielding layer molding die has a molding part having a shape that can be loosely fitted in the engraving recess with a predetermined gap, for example, a molding part having a similar shape smaller than the engraving recess, and shapes the back side shape of the light-shielding colored layer. To do. A heating unit and a temperature adjusting unit are incorporated in the engraving mold and the light-shielding layer forming mold, if necessary.

The substrate is an unvulcanized rubber composition preformed in a plate shape by calendering, injection molding or the like, and a light-shielding colored layer (top colored layer, translucent colored layer) is formed on an engraving die. After that, it is placed on an engraving die and pressed by a base body die to be molded. The unvulcanized rubber composition is a rubber or elastomer having a hardness (IRHD) when cured of 80 or less and an impact resilience of 40% or more, specifically, a silicone rubber containing a crosslinking agent or the like. Used. The substrate molding die has a molding part for shaping the shape of the back surface of the substrate, and a heating means and a temperature adjusting means are appropriately provided as necessary.

The light-transmitting colored layer, like the light-shielding colored layer,
The second sheet-like material is placed on the engraving mold after the light-shielding colored layer (top surface coloring layer) is formed, and the second sheet-like material is pressed by the translucent layer forming mold to be molded. Similar to the above-mentioned sheet-like article, the second sheet-like article is a PET sheet or the like which has been subjected to a mold release treatment as a carrier film, and a resin binder as a translucent colored resin composition in which a crosslinking agent, a pigment or the like is mixed. An unvulcanized, translucent material is used, which is subjected to calender molding and is dispensed. The light-transmissive layer molding die has a molding portion for shaping the shape of the back surface of the light-transmissive colored layer, and a heating means and the like are provided as necessary.

The top surface colored layer is formed by forming a light-shielding colored layer in the engraved recess of the engraving die, and then injecting the translucent colored resin composition using a pin, a dispenser or the like, and applying the resin composition to the ceiling. It is molded by pressing with a surface layer molding die. The translucent colored resin composition is a transparent resin binder mixed with a pigment, a cross-linking agent, or the like, and desirably has a viscosity of about 20 poises to 100 poises, more desirably from the viewpoint of preventing stringing and the like. Is 40 poise to 6 for convenience of handling.
A material having a viscosity of 0 poise is used.

The display portion is composed of holes (grooves) in the shape of letters, symbols, or codes in which the light-shielding colored layer is removed by a laser marker. The display portion is formed by scanning with a laser marker such as an Nd: YAG laser, or by irradiating laser light through a mask.

[0016]

The method for producing a pressing member for an illuminated push-button switch according to the present invention provides a sheet-like product in which a light-shielding colored resin composition is laminated on a carrier film by calendering or the like, and the sheet-like product is pressed. (Compression) to form the light-shielding colored layer, that is, the light-shielding colored resin composition is pressed in a state of being laminated with the carrier film to form the light-shielding colored layer. Therefore, the light-shielding colored layer can be thinned, the subsequent display portion can be formed with a low-power laser in a short time, and a display portion excellent in visibility and touch feeling can be obtained. In addition, claim 2
In the production method described in (4), the translucent colored resin composition is molded into a sheet laminated on a carrier film, dispensed, and the translucent colored resin composition laminated on the carrier film is added. Since the translucent colored resin composition is molded by pressing, the translucent colored layer can be thinned.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. 1 to 6 show a method of manufacturing a pressing member for an illuminated push button switch according to an embodiment of the present invention, FIGS. 1 to 5 are schematic sectional views showing an intermediate manufacturing process, and FIG. 6 is a completed product. It is a schematic cross section of a certain pressing member.

First, the pressing member which is a finished product will be described with reference to FIG. 6. The pressing member 1 corresponds to the base portion 11 as a support portion for the circuit board and the numeric keys and function keys on the top surface. It integrally has a plurality of key tops 12 as an operation part on which the display part 18 is formed, a thin skirt part 13 for imparting repulsive elasticity to a pressing operation of the key top part 12, and a contact attachment part 14. In this pressing member 1, a transparent colored layer 15 is provided on the entire surface of a transparent or semi-transparent substrate 10, and a transparent colored surface layer 16 is provided on the transparent colored layer 15 on the top surface of the key top portion 12. A light-shielding colored layer 17 is laminated on the entire surfaces of the top surface coloring layer 16 and the transparent coloring layer 15, and the key top portion 1
2 has a display section 18 formed by forming a light-shielding colored layer 16 on the top surface.

As will be described in detail later, the base 10 is made of transparent rubber or elastomer, and the light-transmitting colored layer 15 is made of a light-transmitting resin containing a white pigment having a high light-scattering property such as titanium oxide. The top colored layer 16 is made of a light-transmissive resin containing a chromatic pigment, and the light-shielding colored layer 17 is made of a black pigment such as carbon black that is excellent in laser light absorption and light-shielding properties. The display portion 18 is made of resin and is formed by removing the light-shielding colored layer 17 in a groove shape with a laser.
A movable contact is provided on the contact attachment portion 14 at the same time as the base 10 by two-color molding, or by adhesion or the like in the final step.

The pressing member 1 described above is manufactured as described below. That is, first, as shown in FIG. 1A, the light-shielding colored resin composition 21 is molded on a carrier film 22 with a calendar roll or the like into a layer having a thickness of 20 μm to 50 μm, and is dispensed to obtain a finished pressing member. A sheet-like material 20 having the same size as 1 is obtained. As the light-shielding colored resin composition, an unvulcanized one obtained by mixing a resin binder such as silicone rubber with a black pigment such as carbon black and a crosslinking agent is used. Also, carrier film 2
Reference numeral 2 is a resin film of a thermoplastic resin such as PET having a thickness of about 25 μm to 50 μm, and the surface (surface) on which the light-shielding colored resin composition 21 is laminated is subjected to release treatment with a fluorine compound or the like. Things are used.

Next, as shown in FIG. 1b, an engraving die 30 in which a plurality of engraving recesses 30a corresponding to the key top portion 12 are formed, and a predetermined light-shielding colored layer 17 corresponding to the engraving recesses 30a. The light-shielding colored layer 17 is molded by using the light-shielding layer molding die 31 in which the molding convex portion 31a which can be loosely fitted is formed. Here, the sheet-like material 20 is placed on the engraving die 30 such that the light-shielding colored resin composition 21 faces the opening surface of the engraving recess 30a of the engraving die 30, and the sheet-like material 20 is engraved. Then, the light-shielding colored resin composition 21 is engraved with the light-shielding layer forming die 31 and heated to be cured along the surface of the die 30, that is, the light-shielding colored layer 17 is formed. Then, after the light-shielding colored resin composition 21 is cured,
As shown in FIG.
And the mold is opened, and the carrier film 22 is peeled off.

Subsequently, as shown in FIG. 2a, the drip prevention mold 3 is placed in a part of the engraving recess 30a of the engraving mold 30.
2 to cover a part of the light-shielding colored layer 17 on the inner bottom surface of the engraving recess 30a, and in this state, the plurality of loading portions 33a,
Translucent colored resin composition 4 with pin 33 having 33b
1 is a predetermined engraving concave portion 30a light-shielding colored layer 1 on the bottom surface
Adhere on 7. That is, the loading portion 33 of the pin 33
The translucent colored resin composition 41 is attached to the tips of a and 33b, and the loading portions 33a and 33b are engraved and the recessed portion 30a is formed.
The light-transmitting colored resin composition 41 is attached to the light-shielding colored layer 17 on the bottom by inserting it into the inside. Translucent colored resin composition 41
Is an unvulcanized one in which a binder of a white or chromatic color and a cross-linking agent are mixed in a binder, and the viscosity thereof is adjusted to about 20 to 100 poise, preferably about 40 to 60 poise. In addition, this translucent colored resin composition 41
Can be used by enclosing it in some engraved recesses 30a corresponding to some key tops 12 such as function keys, and using a mixture of pigments of different colors in each engraved recess 30a. It is also possible to use a sheet cut into a predetermined size.

Then, as shown in FIG. 2b, a top surface colored layer forming die 34 having a plurality of forming protrusions 34a and 34b.
The transparent colored resin composition 41 is molded by using. Here, one molding convex portion 34a of the molding die 34 is fitted into the engraved concave portion 30a whose wall surface is covered with the light-shielding colored layer 17, and the other molding convex portion 34b is loaded with the drip prevention mold 32. 2C, the translucent colored resin composition 41 is pressed and heated by the molding protrusions 34a and 34b to mold the top colored layer 16 as shown in FIG. 2c.

Further, as shown in FIG. 3a, similarly to the formation of the light-shielding colored layer 17 (FIG. 1), the light-transmitting colored resin composition 51 is provided on the carrier film 52 with a calendar roll or the like in a range of 20 μm to 50 μm. To obtain a sheet-like material 50 having a size similar to that of the pressing member 1 as a finished product. As the light-transmitting colored resin composition, an unvulcanized one in which a resin binder such as silicone rubber is mixed with a white pigment having a high light-scattering property such as titanium dioxide and a crosslinking agent is used. The carrier film 52 has a thickness of 25.
A surface of a resin film such as PET having a thickness of about 50 to 50 μm, on which the translucent colored resin composition 51 is laminated (front surface)
A material which has been subjected to a release treatment with a fluorine compound or the like is used.

Next, as shown in FIG. 3b, the top surface coloring layer 1
On the engraving die 30 on which 6 is formed, the above-mentioned sheet material 50, the translucent resin composition 51 and the translucent resin composition 5 are formed.
1 is placed so as to face the opening surface of the engraved recess 30a, and the translucent colored layer 15 is formed by the translucent layer forming die 35 in which the plurality of forming protrusions 35a are formed. That is, the molding convex portion 35a of the transparent layer molding die 35 is engraved into the die 30.
Of the engraving recess 30a of the engraving die 30
The sheet-like material 50 between the light-transmissive layer molding die 35 and
The translucent colored resin composition 51 is cured by heating, that is,
The translucent colored layer 15 is formed. Then, as shown in FIG. 3c, the carrier film 52 is peeled off.

Further, an unvulcanized rubber composition such as silicone rubber is molded into a plate shape (sheet shape) by injection molding, calendar molding or the like to obtain a sheet material 60. Then, as shown in FIG. 4, an engraving die 30 on which the translucent colored layer 15 is formed.
A sheet-like material 60 of the unvulcanized rubber composition is placed on the sheet-like material, and the sheet-like material 60 is pressed and heated with the engraving die 30 by the base forming die 36. That is, the unvulcanized rubber composition 60 is vulcanized to form the substrate 10 integrally fixed to the translucent colored layer 15. Then, the base 10 on which the translucent coloring layer 15, the top coloring layer 16 and the light shielding coloring layer 17 are integrally laminated is removed from the engraving die 30.

Next, the substrate 10 having the layers 15, 16 and 17 formed thereon is transferred to the next step to form the display portion 18. As shown in FIG. 5, the display portion 18 is formed by positioning the base 10 at a predetermined position, and then the key top portion 12 of the base 10 is formed.
The top surface is irradiated with laser from the laser marker 70 through the mask 71, and the light-shielding colored layer 17 on the top surface of the key top portion 12 is removed in a symbol or code shape. Laser marker 7
A known YAG laser or the like is used for 0, and a glass mask or the like is used for the mask 71.

As described above, in this embodiment, when the light-shielding colored layer 17 is formed, the light-shielding colored resin composition 21 is formed in layers on the carrier film 22 by calendering or the like to form the sheet 20. This sheet-shaped product 20
Is pressurized and heated. Therefore, handling such as placing the sheet-like material 20 on the engraving die 30 is easy, and
The thickness of the light-shielding colored layer 17 does not become excessively large, the display portion 18 can be easily formed in a short time, and excellent productivity can be obtained. Similarly, since the light-transmitting colored layer 15 is also formed by using the sheet-like material 50 in which the light-transmitting colored resin composition 51 is provided in layers on the carrier film 52, the light-transmitting colored layer 15 can be thinly formed and has excellent light-transmitting properties. Is obtained.

In the above-described embodiment, the pressing member 1 having the transparent colored layer 15 and the top colored layer 16 is manufactured, but the transparent colored layer 15 and the top colored layer 16 are manufactured. It can also be applied to the manufacture of the pressing member 1 having no. Further, in the above-described embodiment, each layer 15, 1
6 and 17 are simultaneously heated and vulcanized during molding, but heating for each molding is omitted and vulcanization is performed collectively afterwards. For example, after the translucent colored layer 15 is formed, it is heated and translucent. The colored layer 15 and the light-shielding colored layer 17 may be vulcanized, or the substrate 10, the light-transmitting colored layer 15 and the light-shielding colored layer 17 may be collectively vulcanized by molding and then heating the substrate 10. It is possible.

[0030]

As described above, according to the method of manufacturing the pressing member for the illuminated push button switch according to the present invention, the sheet-like material is formed by layering the colored resin composition on the carrier film. Since the light-shielding colored layer (translucent colored layer) is formed by pressing the sheet-like material between the engraving die and the forming die, it can be easily handled during the forming.
A thin colored layer can be obtained, a display portion can be formed by a laser in a short time, and a clear display portion can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing, in alphabetical order, a manufacturing process of a light-shielding colored layer in a method for manufacturing a pressing member for an illuminated push-button switch according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing the manufacturing process of the top surface colored layer in the same manufacturing method in alphabetical order.

FIG. 3 is a schematic cross-sectional view showing the manufacturing process of the light-transmitting colored layer in the manufacturing method in alphabetical order.

FIG. 4 is a schematic cross-sectional view showing the manufacturing process of the base body in the manufacturing method.

FIG. 5 is a schematic cross-sectional view showing a process of forming a display unit in the manufacturing method.

FIG. 6 is a schematic cross-sectional view of a pressing member in a completed state manufactured by the manufacturing method.

[Explanation of symbols]

1 Pressing member 10 Base 11 Base part 12 key top 13 Skirt 15 Translucent colored layer 16 Top colored layer 17 Light-shielding colored layer 18 Display 20 Sheets 21 Light-shielding colored resin composition 22 Carrier film 30 engraving mold 30a Engraved recess 31 Shading layer molding die 32 Drip prevention mold 33 pin 34 Top surface colored layer molding die 35 Translucent Layer Mold 36 Base Mold 41 translucent colored resin composition 50 sheets 51 translucent colored resin composition 52 carrier film 60 sheets 70 Laser marker

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-6-44855 (JP, A) JP-A-8-185755 (JP, A) JP-A-2-52788 (JP, A) JP-A-62-1 263013 (JP, A) JP 9-219128 (JP, A) JP 10-334758 (JP, A) JP 2-260335 (JP, A) JP 7-220565 (JP, A) JP-A-7-130245 (JP, A) JP-A-10-233137 (JP, A) JP-A-2-260334 (JP, A) Practical use JP-A-6-79037 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01H 11/00 B29C 69/00 B29D 31/00

Claims (4)

(57) [Claims] 1. A substrate in which a key top portion bulges from the base portion to the surface side, a light-shielding colored layer formed on the entire surface of the substrate, and the light-shielding colored layer is removed in a letter / symbol shape. In the manufacturing method for manufacturing a pressing member for an illuminated push-button switch, the sheet-shaped article is produced by laminating and forming a light-blocking colored layer with a light-blocking colored resin composition on a carrier film. An object is placed in an engraving die in which an engraving recess corresponding to the key top portion is formed, with the light-shielding colored layer facing the opening surface of the engraving recess, and the sheet-like object is formed into a light-shielding layer forming metal. After pressing with a mold to shape the sheet-shaped product in a state of being stuck to the engraving mold, the carrier film is peeled from the shaped sheet-shaped product, and then molded into a substantially plate shape. Engraved unvulcanized rubber composition Is placed on the opening surface of the engraved recessed portion, the unvulcanized rubber composition is pressed by a substrate molding die to form a substrate on the light-shielding colored layer, and then removed from the engraving die to obtain the light-shielding coloring. A method for manufacturing a pressing member for an illuminated push button switch, which comprises removing the layer with a laser to form a display portion. 2. A pressing member for an illuminated push-button switch has a translucent coloring layer between the base and the light-shielding colored layer, and the translucent coloring is formed on a carrier film before molding the base. A light-transmitting colored layer is laminated and formed with a resin composition to prepare a second sheet-like material, and the second sheet-like material is engraved with the light-transmitting coloring layer on the engraved recess opening surface of the engraving die. The second sheet is placed in a state of facing the opening of the recess, the second sheet-like material is pressed by a light-transmissive layer molding die to be overlapped and shaped on the light-shielding colored layer, and then the shaped second sheet. The method for manufacturing a pressing member for an illuminated push button switch according to claim 1, wherein the carrier film is peeled from the sheet-like material, and the substrate is molded on the translucent colored layer. 3. A base body in which a key top portion bulges from the base portion to the front side, a translucent top coloring layer laminated on at least a part of the top surface of the key top portion, and the top coloring. A manufacturing method for manufacturing a pressing member for an illuminated push button switch, comprising: a light-shielding colored layer formed on the entire surface of the substrate and the base; and a display section formed by removing the light-shielding colored layer into a character / symbol shape. A sheet-like product is prepared by laminating a light-shielding colored layer of a light-shielding colored resin composition on a carrier film, and the sheet-like product is formed with an engraving die having engraved recesses corresponding to the key top portion. The light-shielding colored layer is placed in a state of facing the opening surface of the engraved concave portion, and the sheet-like material is pressed and heated by a light-shielding layer forming die to form the light-shielding colored layer in the engraving die. Vulcanized in the state of being stuck to After peeling the carrier film from the light-shielding colored layer that has been turned into a transparent light-transmitting colored resin composition having fluidity on the light-shielding coloring layer on the bottom surface of the engraving recess of the engraving die, the light-transmitting coloring The resin composition is pressed and heated by a mold to form a top colored layer on at least a part of the light-shielding colored layer on the inner bottom surface of the engraved recess, and then an unvulcanized rubber formed into a substantially sheet shape. The composition is placed on the engraved recess opening surface of the engraving die, and the unvulcanized rubber composition is pressed and heated by the substrate forming die to form a substrate integrally fixed to the translucent colored layer. A method for manufacturing a pressing member for an illuminated push button switch, which comprises removing from the engraving mold after molding and removing the light shielding colored layer with a laser to form the display portion. 4. An illuminated push-button switch pressing member has a translucent coloring layer between the base and the light-shielding coloring layer,
Prior to molding the substrate, a translucent coloring layer is laminated and formed on a carrier film with a translucent coloring resin composition to prepare a second sheet-like article, and the second sheet-like article is subjected to the engraving mold. The light-transmitting colored layer is placed on the opening surface of the engraved concave portion so as to face the opening of the engraved concave portion, and the second sheet-like material is pressed and heated by a light-transmissive layer forming die to produce the light-transmissive layer. 4. The carrier colored film is vulcanized and laminated on the light-shielding colored layer and the top colored layer, and then the carrier film is peeled off, and the base is fixed to the translucent colored layer for molding. A method for manufacturing a pressing member for an illuminated push-button switch according to item 4.