JPH0336012Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a novel keyboard switch constructed using a membrane switch module (hereinafter referred to as a switch module).

(b) Conventional technology Conventionally, this type of keyboard switch
As shown in Japanese Patent No. 58-160788, a membrane keyboard switch is constructed by laminating an upper layer sheet with printed contacts and a lower layer sheet with a spacer sheet in between, and arranging a large number of contacts in parallel. Ta.

(c) Problems that the invention aims to solve By the way, with the keyboard switch described above, it is difficult to arrange the switch according to the user's specifications in small quantities due to cost considerations, and improvements in this respect are desired. was.

(d) Means for solving the problem This invention was proposed to solve the above problem.The switch module is arranged together with a spacer at a predetermined position on the printed circuit board, and the switch module is is attached to the printed circuit board by a removable conductive connecting member at the contact lead-out part, and a top sheet showing a key operation part is attached to the switch module and the spacer at a position corresponding to the switch module. The feature is that it is configured as a keyboard switch.

(e) Function Therefore, in the keyboard switch of this invention, the switch module can be attached to a predetermined position on the printed circuit board using a removable conductive connecting member, and the contact signal can be transmitted to the switch module. It is sent out from the printed circuit board terminal section via the contact lead-out section, the conductive connecting member, and the conductive wire of the printed circuit board.

(f) Embodiment An embodiment of this invention will be described below with reference to the drawings.

In Fig. 1, 1 is a printed circuit board, and a plurality of through holes 1a and 1b, which are bored at an IC pitch (a multiple of 2.54 mm), are provided in pairs at predetermined positions. is led out to the terminal portion 10 of the printed circuit board 1 by a conductive wire (not shown). Note that the terminal portion 10 is electrically connected to a load by fitting into a connector (not shown) or the like. Reference numeral 2 denotes a switch module, as shown in FIG. 2, which is formed into a thin sheet shape having a contact portion 20 and a contact lead-out portion 21, and is configured as one membrane switch consisting of make contacts. The contact deriving part 21 has two terminals 21a connected to the movable contact and the fixed contact, respectively.
21b is led out, and terminal holes 21c and 21d are formed at the IC pitch so as to correspond to the through holes 1a and 1b formed in the printed circuit board 1, respectively, and conductive connecting members are formed from these terminal holes 21c and 21d. Certain connection pins 3a and 3b are inserted and passed through through holes 1a and 1b to attach the switch module 2 to the printed circuit board 1. In this case, since the connection pins 3a and 3b are formed with elastic pieces 3c having hooks 3d at their tips, the through holes 1a and 3b of the printed circuit board 1,
It can be locked with the hook 3d at the part 1b,
Furthermore, since the elastic piece 3c and the hook 3d are brought into contact with the through holes 1a and 1b, electrical continuity is established. In addition, hook 3
By removing d, the connecting pins 3a and 3b can be removed from the printed circuit board 1. Various types of conductive connecting members can be considered in addition to these connecting pins, but they have the function of connecting the terminal portions 21a, 21b of the switch module 2 and the conductive wires of the printed circuit board 1, and are also suitable for connecting the switch module 2. 2 to the printed circuit board 1 in a removable manner. Further, the switch module 2 is attached to the printed circuit board 1 on the back side of the contact portion 20 with double-sided adhesive tape (not shown) or the like, so that it can be easily removed. A spacer 4 having approximately the same thickness as the switch module 2 is attached to the peripheral portion of the switch module 2 on the printed circuit board 1 using double-sided adhesive tape or the like. A surface sheet 5 made of polyester film or the like is attached to the top of the switch module 2 and the spacer 4 with a double-sided adhesive tape or the like and has a key operation section 50 formed at a portion corresponding to the switch module 2. A partial sectional view of the keyboard switch A formed in this manner is shown in FIG. Reference numeral 6 in FIG. 1 is an electroluminescent lamp module which has the same structure as the switch module 2 and can be detachably attached to the printed circuit board 1.
A light-emitting display is performed at the light-transmitting portion 51 of the top sheet 5. Therefore, keyboard switch A constitutes a keyboard switch equipped with a display section.

(g) Effects of the invention As mentioned above, in this invention, by using the switch module, it is possible to easily configure a keyboard switch equipped with the required number of switch contacts according to the user's request. in,
Furthermore, since it can be easily attached and detached due to its structure, it is very effective in terms of manufacturing and maintenance.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a keyboard switch according to an embodiment of the invention, FIG. 2 is a perspective view of the switch module, and FIG. 3 is a partial sectional view of the keyboard switch. 1: Printed circuit board, 1a, 1b: Through hole, 10: Terminal section, 2: Switch module, 2
0: Contact portion, 21: Contact derivation portion, 21a, 21
b: terminal, 21c, 21d: terminal hole, 3a, 3
b: Connection pin, 3c: Elastic piece, 3d: Hook,
4: Spacer, 5: Top sheet, 50: Key operation section.

Claims (1)

[Scope of utility model registration request] A printed circuit board is provided, a membrane switch module is disposed at a predetermined position on the printed circuit board together with a spacer, and the membrane switch module is attached to the printed circuit board at its contact lead-out portion by a detachable conductive connecting member. 1. A keyboard switch according to the above, characterized in that a top sheet showing a key operation section is attached to the membrane switch module and the spacer at a corresponding position to the membrane switch module.