JPH0419699Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial field of application" This invention is applicable to electrical applications. The present invention relates to a keyboard switch that can be widely applied as an information input device for electronic equipment and an operation input switch means for various types of equipment, and particularly relates to a lead-out structure of a terminal portion thereof.

``Prior Art'' This type of keyboard switch has conventionally provided a plurality of required fixed contact patterns 2 on a flexible or hard base member 1, as shown in FIG. Arranges a flexible switch sheet 3, and has a fixed contact pattern 2 on its inner surface.
In addition to providing a plurality of movable contact patterns 4 that individually perform switch operations in accordance with the
A switch operation gap 6 is formed between the opposing contact patterns 2 and 4 with a switch sheet 3 interposed therebetween.
A terminal base is formed by pasting a decorative sheet 7 made of urethane foam material or the like showing input indicators such as characters corresponding to the position of each switch and input purpose, and extending the base member 1 into a tongue shape. It has a structure in which a wiring pattern leading to the contact pattern 2 is formed on the surface of the material 1A, and a terminal portion is formed by covering this with a cover film 8.

"Problems to be solved by the invention" The keyboard switch has a terminal base material 1
It is attached to a predetermined part of an electronic device, etc. using an adhesive piece 9 attached to A, but according to the conventional structure shown in the figure, the terminal base material 1A is exposed laterally from the main body of the keyboard switch. and as shown in FIG. 4, a cover film 8
As a result, a gap 10 is formed at the connection between the main body of the keyboard switch and the terminal base material 1A, so depending on where this keyboard switch is installed, water, other dirt, oil, etc. may be present in the gap 10. This has led to problems such as deterioration of the contact pattern in the keyboard switch and peeling of the joints of each member.

"Means for Solving the Problems" The present invention provides a keyboard switch that can solve the above problems, and for this purpose, according to the present invention, a base member having a required number of contact patterns is provided. A switch sheet is disposed in the upper part and has another contact pattern at a position corresponding to each of the contact patterns, and a switch operation gap is formed between both of the contact patterns, and wiring leading to the contact patterns is provided. A keyboard switch having a patterned terminal section is characterized in that the terminal section is constituted by a terminal section base material in which a portion of the base member is cut out, for example, in a substantially U-shape.

Embodiment FIGS. 1 and 2 show a keyboard switch constructed according to an embodiment of the present invention, in which, like the conventional example, a desired fixed contact pattern is provided on a flexible or hard base member 11. A plurality of flexible switch sheets 1 are provided above the base member 11.
5, and the fixed contact pattern 1 is placed on the inner surface thereof.
2, a plurality of movable contact patterns 16 are provided for each switch operation, and an insulating spacer 17 is interposed between the base member 11 and the switch sheet 15 to perform switch operation between the contact patterns 12 and 16. A gap 18 is formed, and a decorative sheet 19 is further provided on the switch sheet 15. In the present invention, the following terminal portion is formed on the main body of the keyboard switch. That is, a part of the base member 11 is formed in advance in the terminal portion base material 11B by, for example, a U-shaped notch 11A, and a wiring pattern 13 reaching the fixed contact pattern 12 is provided on the upper surface of the base member 11.
is covered with a cover film 14 with its tip exposed as a terminal pattern 13A. The spacer 17 is cut out so as not to be located in the notch 11A and the terminal portion configured as described above. Further, one end of the cover film 14 is placed close to a spacer 17 located at the base of the terminal base material 11B.

According to this keyboard switch structure,
When mounting the terminal part base material 11B by bending it at an appropriate angle and pasting the adhesive piece 20 provided on the lower surface of the tip to a desired part of the device, the terminal part is surrounded by the base member 11, so the terminal part is surrounded by the base member 11. Even if a gap exists around the cover film 14 of the terminal part, there is no risk of water, oil, or other dirt entering from the terminal part and deteriorating the contact pattern or damaging the bonding of each part.

"Effects of the Invention" As described above, the keyboard switch of the present invention has a terminal part base material formed by cutting out a part of the base member in a U-shape and forming the keyboard switch main body. Since the terminal part is provided inside the keyboard switch, it is possible to reliably prevent a gap from being created at the end of the keyboard switch when the terminal part is extended outward from the main body of the keyboard switch as in the conventional structure. This prevents water, oil, and other foreign matter from entering through the terminals and impairing the keyboard switch function, thereby increasing the operational reliability and durability of the keyboard switch.

[Brief explanation of the drawing]

FIG. 1 is a conceptual sectional view of a keyboard switch according to an embodiment of the present invention, FIG. 2 is a bottom view thereof, FIG. 3 is a conceptual sectional view of a conventional keyboard switch, and FIG. 4 is a conceptual sectional view of a keyboard switch according to an embodiment of the present invention. , is an enlarged sectional view taken along the line - in FIG. 11...Base member, 11A...Notch, 11B
...Terminal base material, 12, 16...Contact pattern, 13...Wiring pattern, 13A...Terminal pattern, 15...Switch sheet, 17...Spacer, 18...Switch operation gap.

Claims (1)

[Scope of utility model registration request] A switch sheet is provided above a base member having a required number of contact patterns, and has another contact pattern at a position corresponding to each of the contact patterns, and a switch operation gap is formed between each of the contact patterns. In addition, in the keyboard switch having a terminal portion of a wiring pattern leading to the contact pattern, the terminal portion is formed by a portion of the base member in a U-shaped notch portion of the base member. A keyboard switch characterized by comprising: