JPH0535536Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a key sheet structure for protecting operation switches on the surface of an operation panel, etc.

(Prior Art) For example, when a plurality of mechanical switches are provided on an operation panel, a key sheet is sometimes attached to the surface of the switch for the purpose of protecting the surface or displaying the type of key. The assembly process for so-called membrane switches that adhere this type of key sheet is as follows:
Since the release paper on the back of the key sheet must be removed and pasted, it is difficult to automate this process, and traditionally this process has been done manually. This is because the release paper of the key sheet was formed to have the same size as the main body of the key sheet.

(Problem that the invention aims to solve) In other words, the release paper that is pasted on the conventional key sheet and protects its adhesive layer has a cracked back to make it easier to remove it manually.
When automating the key sheet pasting process using a robot or the like, this type of back crack alone was insufficient.

The present invention has been made in view of the above points, and its purpose is to provide a key sheet structure that allows the release paper to be removed more easily.

(Means for Solving the Problem) According to the present invention, in a key sheet structure for a membrane switch that is affixed to the panel surface of an operation panel on which an operation switch is placed and fixed, there is a through-hole through which the operation part of the operation switch passes. A key sheet main body comprising a polyester sheet formed with a polyester sheet, a key sheet having a convex portion fixed to the upper surface of the polyester sheet by an adhesive layer and covering the operating part of the operation switch, and an adhesive provided on the lower surface of the polyester sheet. and,
a release paper that is adhered to the lower surface of the key sheet main body and has the same outer peripheral shape as the polyester sheet; and a release paper that is integrally formed with the release paper and that protrudes outward from the outer peripheral edge of the key sheet main body. To provide a key sheet structure characterized in that it has a tag formed by a.

(Function) The key sheet structure of the present invention allows the release paper to be easily removed even during automatic assembly work by a robot by using the tag as a gripping margin.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIGS. 1a and 1b are a sectional view and a perspective view showing an embodiment of this invention. A plurality of convex portions 1a are formed on a key sheet 1 made of a flexible urethane sheet. An operating section corresponding to a key of an operating switch fixed on an operating panel, which will be described later, is fitted inside the convex portion 1a. A polyester sheet 3 is arranged on the back side of the key sheet 1, and the key sheet 1 and the polyester sheet 3 are fixed to each other via an adhesive layer 8. In addition, in the polyester sheet 3, a through hole is made in a portion corresponding to the lower part of the convex portion 1a.
The plane size of this polyester sheet 3 is the same as that of the key sheet 1. An adhesive 2 is applied to the lower surface of the polyester sheet 3, and a release paper 4 for protecting the adhesive 2 is adhered to the surface of the adhesive 2. The key sheet body 10 is composed of the key sheet 1, the polyester sheet 3, the adhesive layer 8, and the adhesive 2.

A part of the release paper 4 has a tag 4a projecting outward from one edge of the key sheet main body 10 to facilitate the peeling operation of the release paper 4. In this embodiment, a tag 4a integrated with a release paper 4 is used, and the length and width of this overhang are as follows:
It is adjusted to the specifications of the robot hand that performs assembly work.

FIGS. 2a and 2b are a sectional view and a perspective view showing another embodiment of this invention.

In this embodiment, the release paper 4 attached to the back side of the key sheet 1 has the same size as the key sheet 1, but before starting work, a tape 5 corresponding to the above-mentioned tag 4a is attached to the side of the release paper 4. It is attached by protruding outward from the edge. Here, an adhesive tape with a width and length that matches the specifications of the robot hand used for assembly work is prepared, one end of which is sandwiched between the release paper 4 and the adhesive layer on the inside, and the other end is placed on the outside of the adhesive tape. It is then folded back to form a separate piece of tag 4b.

FIG. 3 shows another embodiment in which a separate piece of tag is formed around the outer periphery of the release paper 4. FIG. In this embodiment, if a conventional product with a release paper 4 of the same size affixed to the back surface of the key sheet main body 10 is already prepared, the release paper 4 is bonded with a high adhesive strength. Tag 4c using tape
is formed. This differs from the previous embodiment in that it is sufficient to simply apply the adhesive tape to the outside of the release paper, which is preferable in terms of automating the process of forming the tag itself.

FIG. 4 shows a cross section of a membrane switch formed using the above key sheet. The operation switch 6 is connected to the operation section 6a from the surface of the operation panel 7.
The key sheet main body 10 is stuck onto the operation panel 7 with the adhesive 2, and the convex portion 1a formed on the key sheet 1 is fitted into the operation portion 6a.

In all of the embodiments shown in FIGS. 1 to 3 and their explanations, the key sheet main body 10 is connected to the operation panel 7.
Shortly before being pasted on top, the release paper 4 itself is removed together with the tag by an automated assembly device such as a robot. Further, when the work of attaching the key sheet 1 is automatically performed, the number of work steps can be reduced.

It goes without saying that the present invention is not limited to the details of the configuration and structure of the illustrated embodiments. For example, the present invention can be implemented in other embodiments or in various embodiments, such as by forming tags on the front edge of the key sheet, if desired. Moreover, the language and terminology herein is to be understood in the sense of disclosure and not of limitation.

(Effects of the invention) As explained above, according to the invention, the release paper can be easily peeled off using the tag, and the key can easily be automated when assembling items with a large number of key switches such as operation panels. A sheet structure can be provided.

[Brief explanation of the drawing]

1A and 1B are a cross-sectional view and a perspective view showing one embodiment of the present invention, FIGS. 2A and 2B are a sectional view and a perspective view showing another embodiment of the present invention, and FIG. FIG. 4 is a cross-sectional view of a key switch showing an example of the use of a key sheet. 1...Key sheet, 3...Polyester sheet, 4...Release paper, 4a...Tag.

Claims (1)

[Scope of Claim for Utility Model Registration] In the key sheet structure for a membrane switch that is affixed to the surface of an operation panel on which an operation switch is placed and fixed, a polyester sheet is formed with a through hole through which the operation part of the operation switch passes. a key sheet main body having a key sheet having a convex portion fixed to the upper surface of the polyester sheet by an adhesive layer and covering an operating part of the operating switch; and an adhesive provided on the lower surface of the polyester sheet; and a lower surface of the key sheet main body. a release paper adhered to the polyester sheet and having the same outer circumferential shape as the polyester sheet; and a tag formed integrally with the release paper and protruding outward from the outer peripheral edge of the key sheet main body. A key sheet structure characterized by having the following.