JP3024461U - Touch switch panel - Google Patents

Abstract

(57) [Summary] A surface layer is formed except for a pressing portion formed by integrally molding a plastic film or sheet located inside the surface layer except that the pushing portion is exposed on the surface. Touch switch panel consisting of a resin molded body. [Effect] Since the surface layer excluding the switch portion of the touch switch panel is the injected resin layer, the surface of the resin layer can be decorated with texture, cloth transfer, or the like, depending on the purpose. Can take the design of. Compared with the conventional manufacturing method, the process can be largely omitted, and the work is simple and easy. Therefore, the cost can be reduced and it can be provided industrially advantageously.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a touch switch panel that is widely used in the fields of electronic and electric devices.

[0002]

[Prior art]

 Touch switch panels (also called membrane switches or touch panels) are used for many remote controls such as televisions, air conditioners, lights, VTRs, game machines, telephones, and various portable electronic and electric devices, as well as washing machines, It is also widely used in electric kettles, electronic jars, and other household appliances.

The touch switch panel currently used mainly has a sectional (laminated) structure shown in FIG. This type of touch switch panel has an advantage that it does not infiltrate water and dust and does not easily collect dirt because it has a surface covered with a transparent film, unlike the panel of the button switch of the past. It is used in a wide range of fields including products as described above.

The basic structure of a conventional touch switch panel is, as shown in FIGS. 4 to 6, a transparent polyethylene terephthalate film or sheet 1 (hereinafter abbreviated as PET film) having a predetermined print on the back surface, The laminated body with a white solid film covering the printing surface is used as an outer layer, and the inner layer is integrally laminated by injection molding in which a punched space is provided at the switch portion 3 and other pushing portion 4 The structure is a resin molded body 2.

The reason why the conventional structure has such an aspect lies in its manufacturing method. That is, the PET film is first printed, the printed surface is covered with a white solid film or the like, thermoformed into a predetermined shape, and then the molded film is fitted into an injection molding die, and then the This is because the target touch switch panel was manufactured by the method of setting the mold according to the method and injecting the resin. As long as this manufacturing method is used, the resin injection port must always come to the back surface (white solid film side) of the laminated PET film (since the outer layer is a film, it is not possible to inject resin therethrough). As a result, the above-mentioned cross-section (laminated) structure is inevitably and unavoidable.

[0006]

[Problems to be solved by the device]

 However, the conventional manufacturing method requires two types of molding processes, thermoforming and injection molding, which increases the number of equipments and operations, and also complicates fitting the thermoformed PET film into the injection molding die. There is a problem that it also requires work, and the development of a simpler manufacturing method was desired.

In addition, in the age of diversification, the appearance of a new touch switch panel, which is different from the conventional one pattern in terms of design and structure, has been awaited. The present invention meets these needs, and it is an object of the present invention to provide a touch switch panel having a novel structure that can be manufactured by a greatly rationalized and simple method as compared with the conventional method. is there.

[0008]

[Means for Solving the Problems]

 Therefore, the present inventor examined the omission of the thermoforming step of the PET film in order to provide a simple manufacturing method. Among them, contrary to the conventional wisdom, I got the idea of ejecting resin from the front side of PET film, and as a result of repeated efforts to make it an industrial process, I finally completed the method and used it. We have succeeded in providing the touch switch panel of the present invention having a novel laminated structure that has never existed before.

That is, the present invention is formed integrally with a plastic film or sheet (1) located inside the surface layer except that the pushing portions (3, 4) are exposed on the surface and the film or sheet (1). The present invention provides a touch switch panel including a resin molded body (2) forming a surface layer except for the pressed portions (3, 4).

[0010]

[Embodiment of device]

 The constituent features and embodiments of the present invention will be described below in detail with reference to the drawings. The touch switch panel of the present invention basically has a laminated structure as shown in the sectional view of FIG. 1 in FIG. 2 is a plastic film or sheet. As the plastic, a transparent polymer having appropriate hardness and resistance, such as polyethylene terephthalate (PET), polycarbonate, vinyl chloride resin, styrene resin, or the like is used.

Further, elastomers having a soft touch feeling, such as urethane elastomer, silicone rubber, SBR, etc. can also be used. In the case of the former transparent plastic film, it is suitable for a touch switch panel in which characters, figures, etc. are printed on the back side or the printed films are pasted together so that they can be seen from the front side.

Reference numeral 2 in FIG. 2 is a resin molded body integrally molded with the above-mentioned 1 by injection molding. As the resin used in 2, any synthetic resin for injection molding can be used, but normally, a transparent resin having an appropriate hardness, such as polymethylmethacrylate, polycarbonate, polystyrene resin, AS resin, polyolefin resin or the like, In many cases, ABS resin and impact-resistant polystyrene resin (HIPS), which have excellent strength, are used.

In order to enhance the adhesiveness between the plastic film (sheet) 1 and the resin molded body 2, a known adhesive layer 5 such as a vinyl chloride type or an acrylic type can be interposed therebetween. In this case, the adhesive is preferably laminated in a desired pattern on the plastic film by printing such as screen printing.

As shown in FIGS. 1 to 3, the switch portion (3) provided in the resin molded body 2 and the pushing portion (4) according to various purposes form a punched space. The laminated film 1 has a structure in which a flat surface or, preferably, an upper portion of the laminated film 1 is exposed from the back side of the space portion so as to form a gentle curved surface.

Next, a method of manufacturing the touch switch panel of the present invention will be described. As shown in FIG. 7, a plastic film is inserted into an injection molding die and the die is set. At this time, a plastic film is mounted so as to cover the parting surface of the female mold (cavity) 9 of the mold, and then the mold is set while pushing the film with the male mold (core) 10. At that time, the pushing portion (3, 4) of the switch portion is in a so-called push-cut state in which the plastic film is in direct contact with the female mold surface, and the injection resin does not enter the portion. When the mold is set, molten resin is injected into the mold.

In the present invention, the molten resin injection port (gate) 11 is provided in the female mold, and the major feature is that the resin is injected from the surface of the plastic film set in the mold. is there. On the other hand, in the conventional method, as shown in FIG. 8, the preformed film 8 is fitted into the female mold 9, and then the melt resin is injected from the gate 11 provided on the back side of the film, that is, the male mold 10 side. The method of doing was used.

As described above, in the case of the present invention, in the conventional method, the step of forming the plastic film by preforming (thermoforming) and fitting it into the mold is omitted, and when setting in the mold. The male mold succeeded in forming and mounting the film all at once. In the present invention, it is preferable to preheat the plastic film at 80 to 150 ° C. for about 20 seconds to 1 minute because better results can be obtained. Hereinafter, the embodiment of the present invention will be described more specifically by way of examples.

[0018]

Example 1 A 0.2 mm-thick PET film 1 coated with a vinyl chloride adhesive 5 was preheated at 100 ° C. for 30 seconds, and then a female mold used for manufacturing the touch switch panel shown in FIGS. It was detachably attached to the parting surface of the mold (cavity) 9 with adhesive tape.

Next, a mold is set as shown in FIG. 7, and molten ABS resin (ABS 191F manufactured by Asahi Kasei) is injected from the gate 11 of the cavity under the following molding conditions, and molded and post-treated by a conventional method. The touch switch panel shown in FIGS. (Molding conditions) Injection molding machine: Toshiba IS-80AM Resin temperature: 230 ° C Mold temperature: 40 ° C Cycle time: 49 seconds / 1 cycle

[0020]

[Effect of device]

 The touch switch panel of the present invention is different in cross-section (laminated) structure from the conventional one, and the surface layer is an injected resin layer except for the pushing part such as the switch, so that the surface of the resin layer is textured. The advantage is that decoration such as cloth transfer can be performed. Further, if the resin is a transparent resin, it can be made into a design using printing or the like provided on the inside, and there is an advantage that various designs can be taken according to the purpose. Further, the touch switch panel of the present invention has a manufacturing process that can be largely omitted compared to the conventional one, and the work is simple and easy. Therefore, the cost can be reduced and the touch switch panel can be provided industrially advantageously. is there.

[Brief description of drawings]

FIG. 1 is a plan view of a touch switch panel of the present invention.

2 is a touch panel A-a-b-B of FIG.
-A 'sectional view

FIG. 3 is an enlarged view of a portion B and below in FIG.

FIG. 4 is a plan view of a conventional touch switch panel.

5 is a touch switch panel A-a-b-B- of FIG.
A'cross section

FIG. 6 is an enlarged view of a part B and below in FIG.

FIG. 7 is a sectional view for explaining a mold assembling mode of the present invention.

FIG. 8 is a sectional view for explaining a die assembling method of a conventional method.

[Explanation of symbols]

 1 Plastic Film (Sheet) 2 Resin Molded Body 3 Switch Section 4 Pushed Parts Other than Switch 5 Adhesive Layer 6 Printing 7 White Solid Film 8 Thermoformed (Preformed) Body of Film (Sheet) 9 Female Mold (Cavity) ) 10 Male mold (core) 11 Gate

Claims (4)

[Scope of utility model registration request] 1. A plastic film or sheet (1) located inside the surface layer except that the pressing portions (3, 4) are exposed to the surface and the film or sheet (1) integrally molded A touch switch panel comprising a resin molding (2) forming a surface layer except for the portions (3, 4). 2. The touch switch panel according to claim 1, wherein an adhesive layer (5) is interposed in the laminated portion of the plastic film or sheet (1) and the resin molding (2). 3. A plastic film or sheet (1)
Is transparent, the back surface and / or the front surface is printed, and the opaque film is laminated on the back surface,
The touch switch panel according to claim 1 or 2, wherein the pushed portions (3, 4) have a raised curved surface. 4. The touch switch panel according to claim 1, wherein the surface of the resin molded body (2) is decorated.