JPH0339864Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a terminal insulation structure for a keyboard switch used in a touch keyboard for inputting a personal computer, etc., and in particular, the invention relates to a terminal insulating structure for a keyboard switch used in a touch keyboard for inputting a personal computer, etc. Regarding the insulation structure of terminals.

Prior Art Figure 9 shows the terminal insulation structure of a conventional keyboard switch, in which 1 is formed by printing or chemical etching a plurality of contacts (not shown) and a plurality of terminals 2 that selectively conduct with the contacts. The flexible insulating sheet 3 is an insulating sheet pasted on the terminal 2 portion.

FIG. 10 shows another example of the terminal insulation structure of a conventional keyboard switch, in which a plurality of contacts 4 (not shown) and a plurality of terminals 5 selectively connected to the contacts are formed by printing or chemical etching. The flexible insulating sheet 6 is an insulating resist ink printed on the terminal 5 portion.

Conventional disadvantages In the conventional technology described above, in order to protect the terminals 2 and 5 from the outside, separate parts such as an insulating sheet 3 and an insulating resist ink 6 are required, resulting in an increase in the number of parts. , requiring special work processes such as printing work, resulting in poor workability and high costs, making it unsuitable for mass production.

Means for Solving the Problems The present invention utilizes a single flexible insulating sheet on which contacts and terminals that selectively conduct with the contacts are wired, and a portion of the sheet is folded back to cover the terminals. This ensures that the terminals are insulated from the outside.

Embodiment FIGS. 1 to 4 are a perspective view, a side view seen from the direction A in FIG. 1, a developed view, and a plan view showing material removal, respectively, showing an embodiment of the terminal structure of a keyboard switch according to the present invention. . In the figure, 7 is a flexible insulating sheet formed by printing or chemically etching a plurality of contacts (not shown) and a plurality of terminals 8 selectively connected to the contacts, and 9 is a terminal as shown in Fig. 3. 8 is an extension of the flexible insulating sheet 7 adjacent to the flexible insulating sheet 7a. Third
As shown in the figure, the flexible insulating sheet 7a has an overhanging portion 7b.
and a slit 7c, the extension part 9 is provided with a trapezoidal overhang part 9a with both sides inclined, and a slit 10 is provided between the extension part 9 and the flexible insulating sheet 7a on which the terminal 8 is formed. With the slit 10 as a fold, the extension part 9 is formed as shown in FIGS.
It is folded back as shown in the figure, and then the overhanging part 9 of the extension part 9
By fitting a into the slit 7c of the flexible insulating sheet, the terminal 8 is covered and the extension part 9 is fixed. FIG. 4 shows the portion of one flexible insulating sheet occupied by the flexible insulating sheet 7 according to the present invention, and the shaded portion in the figure is the portion that was conventionally discarded. As can be seen from the figure, in the present invention, some of the conventionally discarded parts are used as the extension part 9, its overhanging part 9a, and the overhanging part 7b of the flexible insulating sheet 7a.

In the above explanation, the overhanging part 9a of the extension part 9 and the slit 7c of the flexible insulating sheet 7a into which the overhanging part 9a is fitted are one pair, but as shown in FIG. In addition, a plurality of overhanging portions 9a and a plurality of slits 7c may be provided to form a plurality of pairs, and the overhanging portion 9a of the extension portion 9 may have third slits on both sides.
In order to facilitate insertion into the slit 7c without being inclined in the direction of the overhanging portion 9a as shown in the figure, it may be formed into an inverted trapezoidal shape as shown in FIG. 6, or may have no inclination at all. Furthermore, the slit 10 between the extension part 9 and the flexible insulating sheet 7a is provided to facilitate folding, but it is not in the shape of a single long slit but in a round or slit shape as shown in FIG. It may also have a shape with a plurality of elongated slits as shown in Figure 8.

Effects As described above, according to the terminal insulation structure of the keyboard switch according to the present invention, no new parts are required to insulate and protect the terminals wired to the flexible insulation sheet from the outside, and workability is improved. This method has advantages such as cost reduction and suitability for mass production.

[Brief explanation of drawings]

1 to 4 show embodiments of the terminal insulation structure of the keyboard switch according to the present invention.
The figure is a perspective view, Figure 2 is a side view seen from the direction of arrow A in Figure 1, Figure 3 is a developed view, Figure 4 is a plan view showing material removal, Figures 5, 6, and 7. , FIG. 8 is a developed view showing another embodiment of the terminal insulation structure of the keyboard switch according to the present invention, and FIGS. 9 and 10 are perspective views showing the terminal insulation structure of the conventional keyboard switch. 1, 4, 7...Flexible insulation sheet, 2, 5, 8
...Terminal, 9...Extension part (part of flexible insulation sheet).

Claims (1)

[Scope of utility model registration request] A contact point and a terminal that conducts with the contact point are arranged on the first flexible insulating sheet, and a second flexible insulating sheet adjacent to the first flexible insulating sheet forming the terminal, The formed extension part has an overhang part, and the first flexible insulating sheet has a slit part into which the overhang part is inserted, and the second flexible insulating sheet is folded back and stretched. A terminal insulation structure for a keyboard switch having a structure in which the protruding part is fitted and fixed into a slit part to cover the terminal.