JPH04509Y2 - - Google Patents

Description

[Detailed description of the invention] "Field of industrial application" This invention relates to a keyboard switch used as an operation input means for various electronic devices.
In particular, the present invention relates to an improvement in a keyboard switch in which the connection of a switch circuit can be easily changed by configuring a part of a pre-formed wiring pattern between the same contact pattern group to be selectively disconnectable.

``Prior Art'' A thin film keyboard switch has a plurality of contact pattern groups arranged opposite each other so that the switch can be configured using an insulating sheet member such as various plastic films. , it is possible to perform on/off operations between a pair of contact patterns in response to a release operation, and the insulating sheet member on which these contact pattern groups are adhered may be of a uniformly flat type or other type. By forming the sheet member corresponding to one contact pattern group and the other contact pattern groups, which are arranged separately and facing each other, into a dome shape, for example, a so-called click action is provided that is accompanied by the perception of a reversal action during pressing and releasing operations. This type is also used. The number of wiring terminals for such a keyboard switch is determined by specifying the required wiring between each contact pattern so that the number of wiring terminals for a pair of contact patterns is at least one more than the number of switches. is formed.

``Problems to be solved by the invention'' As mentioned above, in conventional keyboard switches of this type, the connection wiring patterns for each contact pattern are fixedly formed according to the specifications. Even in the case of specifications such as simply changing the circuit connection of a keyboard switch, it is necessary to design and manufacture a new one each time, which tends to result in a lack of versatility.

"Means for Solving the Problems" In view of the above, the present invention provides a method for connecting one contact pattern group to another contact pattern group arranged oppositely in a keyboard switch equipped with the same number of contact pattern groups. To provide a keyboard switch capable of providing versatility for minor specification changes by configuring wiring so that it can be selectively disconnected according to circuit connection using a means for drilling through holes. It is.

"Embodiment" FIG. 1 shows a conceptually developed plan configuration diagram of essential parts of a keyboard switch according to an embodiment of the present invention.
This keyboard switch 1 has, for example, insulating plastic sheets 2 and 3 arranged in a foldable manner along broken lines, and one sheet 2 has a required number of contact patterns A, B, and C formed by etching onto copper foil or the like. Alternatively, other contact patterns a, which can be formed as appropriate by printing means using conductive ink, etc., can also be formed on other sheets 3 so as to correspond to the above-mentioned contact patterns A, B, and C to form switches separately.
b and c are provided in the same way, and one wiring pattern that commonly connects contact patterns A, B, and C, and the other contact patterns a, b, and c are double connected in series and parallel to each other as shown in the figure. The wiring pattern 5 is provided by the same means as described above. Reference numeral 4 denotes an external connection portion extending toward the sheet 2 side, for example, and a terminal 6 as the termination of the wiring pattern 5 is formed at the end thereof.

When the keyboard switch having the above structure is folded at the broken line portion, an insulating spacer (not shown) is interposed between the sheets 2 and 3 to form corresponding contact patterns A-a and B.
A keyboard switch is obtained by suitably joining these constituent members so that -b, C-c are arranged facing each other. At this time, as illustrated in FIG. 5, as an example, locations P1, P2, P3, P4, P
5 and P6 are punched and disconnected, an on signal is given to L1 and L3 of the wiring pattern 5 in the pressing operation between the contact patterns A-a,
Similarly, in the contact pattern B-b, L1 and L4,
Then, an on signal is applied between L1 and L2 at C-c. In addition, by performing punching and disconnection processing on other wiring pattern locations S1 and S3 belonging to the contact patterns a and b instead of the disconnection locations P1 and P3, L1 and L4 and B-
An ON signal can be generated between L1 and L3 at b and between L1 and L2 at C-c. Therefore, despite the switch configurations relating to the same contact patterns A to C and a to c, there is a means for selectively drilling holes in at least the wiring patterns belonging to the contact patterns a, b, and c of the insulating sheet 3. This makes it possible to easily change the circuit connections as described above. Incidentally, such wire breakage punching means P1 to P6, S1, S3, etc. are attached to the circuit order changing function as described above, and each switch operation blank.
It also has the air escape function of
It has the secondary effect of stabilizing and ensuring the on/off operation of the switch, and therefore, in keyboard switches with a large number of switches, variations in the circuit connection for the same number of contact patterns are possible. It has the uniqueness of being able to standardize a keyboard switch with good switch operation characteristics while easily achieving various types of functions.

"Effects of the Invention" As described above, the keyboard switch according to the invention has the same number of contact patterns constituting the switch groups, but the wiring pattern location for at least one of the contact pattern groups is The circuit configuration of the switch can be selectively changed by the perforation/disconnection configuration means, and the perforation means can also provide an air escape function to the operating space of each switch, etc.
There are some methods that are most suitable for use as a means of standardizing keyboard switches and as part of cost reduction measures.

[Brief explanation of drawings]

FIG. 1 is a conceptual developed plan configuration diagram of a keyboard switch constructed based on an embodiment of the present invention, and FIG. FIG. 4 is a diagram for explaining an example of changing the circuit order of switches. 1... Keyboard switch, 2, 3... Insulating sheet, 4... External connection part, 5... Wiring pattern, 6... Connection terminal, A to C... Contact pattern, a to c... Contact pattern , P1 to P6...Punching disconnection portion, S1, S3...Punching disconnection portion.

Claims (1)

[Scope of utility model registration request] One insulating sheet is provided which has a required number of contact patterns and a wiring pattern that commonly connects these contact patterns, and is arranged at a position corresponding to each of the contact patterns and spaced apart so as to form a switch operation space. Another insulating sheet having another contact pattern and a wiring pattern for connecting the contact patterns in series and in parallel is provided, and the above-mentioned structure leads to each contact pattern formed on the other insulating sheet. A keyboard switch characterized in that it is configured to selectively break a wiring pattern to form a through hole for changing the connection of a switch circuit.