JPH03145022A - Luminous type switch unit - Google Patents

Abstract

PURPOSE:To realize a thin type of the whole body of the set by holding movable up and down a light leading plate at the aperture of a case, and disposing a printed board or a wiring sheet mounting a switch which has a detent and a luminous element at the lower side. CONSTITUTION:Since a luminous element 8 can be disposed as desired at the place other than a switch 9 which has a detent, it is not necessary to place an interval to lead the light between a case 6 and a printed board 7. And since a switch matrix circuit is composed in a membrane switch 2 which has a permeable structure, the pattern wiring on the printed base 7 is simplified, and it can be used commonly with the printed base 7 which composes a main body circuit. Consequently, a thin type is realized as the whole body of the set, and a good lighting of a button can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an illuminated switch unit used in communication equipment such as car telephones and video equipment such as video equipment.

Prior Art A conventional illuminated switch unit has a structure as shown in FIG. That is, the switch 2e and the light emitting element 25 are arranged on the printed circuit board 24 on which the switch matrix circuit is wired, and the case 21 is provided above the switch 26.
An opening 22 is provided in the opening 22, and a button 23 made of a light guide material is disposed therein. Among them, 27 is a printed circuit board that constitutes the main circuit of the set.

According to the configuration, when the light emitting element 25 is turned on, the button 2
Since the bottom surface of the button 3 can be illuminated from an angle, the button 23 can be illuminated.

Problems to be Solved by the Invention However, in the above configuration, the light emitting element 26 and the button 2
In order to uniformly illuminate the buttons 23, the distance between the printed circuit board 24 and the bottom of the case 21 must be approximately 211+jl in practice.
In particular, mobile phones and the like, which are known for their compactness, have had the disadvantage of having to increase the volume of the entire set.

Since the switch matrix circuit is wired on the printed circuit board 24, the wiring pattern becomes complicated, and it cannot be used in common with the printed circuit board 2a constituting the main body circuit.

The present invention is intended to solve such conventional problems, and an object of the present invention is to provide an illuminated switch unit that can be made thinner as a whole set.

Means for Solving the Problems In order to achieve the above object, the present invention has a structure in which movable contacts and fixed contacts are arranged in a net shape on the light guide plate, and holes are formed in the contacts for light transmission in accordance with the illumination design. 9. A membrane switch having a transparent structure is constructed and arranged by a plurality of movable contacts whose contacts are made of transparent electrodes and a fixed contact opposed thereto, and the light guide plate is held in the opening of the case so as to be movable up and down. Below this, a switch with a sense of moderation that switches by the vertical movement of the light guide plate, and a printed circuit board or wiring sheet mounted with a light emitting element that illuminates the light guide plate and the membrane switch are arranged.

Function: According to the present invention, as described above, the light emitting element can be arbitrarily placed in a place other than the switch which has a sense of moderation, so there is no need for a gap between the case and the printed circuit board for guiding light, and Since the switch matrix circuit is configured within a membrane switch with a transparent structure, the pattern wiring on the printed circuit board is simplified and can be shared with the printed circuit board that makes up the main circuit, allowing the entire set to be made thinner. This allows for good illumination of the parenthesis button.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2.

Figure 1 (m) is an external view of the illuminated switch unit of the present invention, in which 1 is a decorative panel made of an elastic polymer material and decorated with a button design; It is fixed at .

FIG. 1) is a sectional view of the illuminated switch unit shown in FIG.
The light guide plate 6 is held in the opening of the case e so as to be movable up and down, and the printed circuit board 7 on which the switch 9 having a sense of moderation and the light emitting element 8 are mounted is arranged below the light guide plate 6.

The operation is performed by pressing the button on the makeup panel 1.
, the movable contact 3 and the fixed contact 4 of the membrane switch 2 are switched, and then the light guide plate 5 is moved downward to switch the moderating switch 9.

Membrane switch 2 controls the switch button position, and moderation switch 9 switches the switch to 0N-OFF.
By detecting this, it is possible to match the switch input of the device with the moderation feel of the button.

Illumination of the switch is achieved by using a light emitting element 7 in a location other than the switch 9.
By being able to arrange them arbitrarily, there is no need for a gap between the light guide plate 5 and the printed circuit board 7 to guide the light. It is transparent! By combining it with a membrane switch whose contacts are composed of poles, it is possible to achieve a thin design with good illumination.

Note that by sharing the printed circuit board 7 on which the switch 9 and the light emitting element 8 are mounted with the printed circuit board on which the main body circuit is mounted, the set can be made smaller and the cost can be reduced.

FIG. 2 shows the light guide plate 6 and case e of FIG. 1 integrally molded, with (m) showing a front view and (B) showing a sectional view.

The light guide plate 5 is connected to the case 6 so as to be movable up and down by the hinge structure of 1o.

Effects of the Invention As described above, according to the present invention, a membrane switch having a transmission structure is arranged on a light guide plate, the light guide plate is held in an opening of a case so as to be movable up and down, and a moderation switch is placed below the light guide plate. By arranging a printed circuit board or a wiring sheet on which a switch with a light-emitting element and a light-emitting element are mounted, it is possible to provide an illuminated switch unit that can be made thin as a whole set, and is of great practical value.

[Brief explanation of the drawing]

FIG. 1 (M) is an external view of an illuminated switch unit that can be pressed according to an embodiment of the present invention, FIG. 1 (B) is a sectional view of the illuminated switch unit of FIG. 1 (M), and FIG. A) is a front view of a case where the case and light guide plate are integrated, and FIG. 2 (B) is a cross-sectional view of this. FIG. 3 is a cross-sectional view of a conventional illuminated switch unit. 1. ... Decorative panel, 2 ... Membrane switch, 3 ... Movable contact, 4 ... Fixed contact, 6 ... Light guide plate, 6 ... ...Case%7...Printed circuit board, 8...Light emitting element, e...Switch with moderation, 10...
・Hinge part.

Claims (1)

[Claims] A membrane switch consisting of a plurality of switches having a transmission structure is arranged on the light guide plate, the light guide plate is held in the opening of the case so as to be movable up and down, and switching is performed by moving the light guide plate below this. An illuminated switch unit characterized by arranging one or more switches and a light emitting element to provide a sense of moderation.