JPS63198216A - Manufacturing method of membrane switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a membrane switch, which has recently been widely used in electronic devices and the like.

[Prior art]

When manufacturing a conventional membrane switch, the method shown in Figure 9 (
As shown in 'b), on the top surface of the base film ■,
D (light emitting diode) or key button part [5] except for button display and other appropriate reverse printing@, and on the other hand, as shown in Fig. 9(a), release paper [phase] [phase] is provided on both sides. From the double-sided adhesive tape 0, punch out the part [phase] corresponding to the key button part ■ using a letterpress 0 so as to leave the part [phase] corresponding to the reverse printing @, and then cut out the part [phase] corresponding to the key button part ■. Peel off the release paper [phase] on the bottom surface and see Figure 9 (C).
As shown in the figure, the corresponding part [phase] of the double-sided adhesive tape was aligned and bonded to the reverse printed @ part.

However, this bonding work has a problem in that positioning is difficult and requires skill, and it takes time to complete the bonding. Recently, attempts have been made to print an adhesive on the top surface of the reversely printed area, but the adhesive that can be used for printing has weak adhesive strength and has not been put into practical use.

[Failure to solve the problem]

In the present invention, the double-sided adhesive tape is not punched in advance, but after the necessary reverse printing is performed on the base film, the parts that require punching (LEDs and key buttons) are directly printed with removable ink. or, prior to printing the release layer, print the release layer on the entire surface through a transparent film, and after the printing dries, double-sided adhesive tape is applied by machine to the entire upper surface, that is, the entire surface of the base film. It is characterized in that the part requiring the punching is half-cut with a punch.

[Example 1] As shown in FIGS. 1 to 4, the present invention is characterized in that: (a) an LED-1: bamboo key button part (2) is partitioned on the upper surface of a flexible transparent base film (2); ○N, OF in the department
In addition to printing the F symbol in reverse, other parts are marked with "lighting".
Reverse printing ■ is done with opaque ink on the entire surface, except for necessary indications such as the letters and patterns of ``Motor'', and b. The above key button part ■ is printed with removable ink to at least fill that part. Print a release layer ■, and after drying the C0 print, apply release paper [5] on the entire top surface.
9. Paste the double-sided adhesive tape [A] using a machine with the paper 9 attached, d. From the release paper ■ side, use a letterpress [6] so as to leave the outline of the reverse printing [2] intact. Half cut, e. Peel off the release layer [3] and double-sided adhesive tape [A] from the cut part.

You can get better results from the process.

When using this membrane switch,
By peeling off the release paper [5] left on the top surface, turning it over and attaching it to the adherend (2), a membrane switch with no adhesive on the LED or key button parts can be obtained.

[Embodiment 2] As shown in FIGS. 5 to 8, the present invention also includes: (a) partitioning an LED or key button part [5] on the upper surface of a flexible translucent base film (2); In the section, ``
Reverse print ■ with opaque ink on the entire surface so as to leave indications such as ``power supply'', ``motor'', ``room 1'', etc. b. Paste a thin transparent film [phase] on the entire top surface, C0. On the 0 part, print a release layer (■) with releasable ink, and (d) After the printing has dried, apply double-sided tape [A] to the entire top surface with a release paper [5] on the top surface using a machine. Paste together, e. From the release paper ■ side, half-cut with a letterpress [6] so as to leave the outline of the reverse printing [2] intact, f. Release layer [3] of the cut part. ] and double-sided adhesive tape [A].

Obtained from the process.

When using this, please use the same release paper as above [5]
It is used by peeling it off, turning it over, and attaching it to the adherend (2) as shown in Figure 8.

〔Effect of the invention〕

As described above, the present invention does not require the process of punching out the double-sided adhesive tape [A] in advance and pasting it to match the reverse printing/■ part of the base film ``■''.
There is no need for pasting work that requires skill, and since the LED section and key button section can be easily peeled off using removable ink, the outline of copy 0 can be maintained as originally printed by reverse printing. And the biggest advantage is that
All you have to do is apply double-sided adhesive tape to the entire surface using a machine, so it is easy to work with and has extremely high utility value.

[Brief explanation of the drawing]

Figure 1 is a plan view of the membrane switch, Figures 2 to 4
The figure is a sectional view showing the manufacturing process of an embodiment of the present invention. Figure 5 is a plan view of another example of the membrane switch, Figure 6 is a plan view of another example of the membrane switch.
FIGS. 8 to 8 are cross-sectional views showing the manufacturing process of other embodiments. FIG. 9 is a sectional view showing the manufacturing process of a conventional membrane switch. A. Key button part 1. Base film 2, reverse printing 3. Release layer 40 double-sided adhesive tape 5,
Release paper 6. Bik 7. Adherent 10, transparent film

Claims (1)

[Claims] 1) A method for manufacturing a membrane switch comprising the following steps. a. On the top surface of the base film [1], reverse print [2] appropriate characters and designs except for the LED or key button part [A], and print characters and symbols on the key button part as necessary; b. , A release layer [3] is printed on the key button part [4] using removable ink so as to fill at least that part, and c. After the printing is dry, a release layer [5] is applied to the entire upper surface of the key button part [4]. Paste the double-sided tape [4] with a machine, d. From the release paper side, half-cut with a biku (letterpress) [6] so as to leave the outline of the back print [2] intact,
Peel off the release layer [3] and double-sided adhesive tape [4]. 2) A method for manufacturing a membrane switch consisting of the following steps. a. Reverse print appropriate characters and designs on the top surface of the base film [1], excluding the LED or key button part [A] [2]
At the same time, print letters and symbols on the key button part as necessary; b. Paste a thin transparent film [10] on the entire top surface; c. At least part [A] on the transparent film can be peeled off. Print a release layer [3] with ink, d. After the printing has dried, double-sided tape [4] with a release paper [5] on the top surface is pasted by machine on the entire top surface, e. Release paper side The transparent film [10] is half-cut with a letterpress [6] so as to leave the outline of the back print [2] intact, and then the release layer [3] and double-sided adhesive tape [4] are cut. Peel off.