JPS62189491A - Display unit for electronic equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a display device for an electronic device used for illuminating a display section of the electronic device.

Conventional technology Figures 5 and 6 show the drawings of conventional display devices.

In these figures, 1 is a case of the electronic device, and 2 is a display board, which is provided on the operation surface of the case l and is usually made of transparent acrylic resin or the like. 3 is a printed circuit board, 4 is a light source lamp attached to a part of the printed circuit board 3, 5 is a switch, and 6 is a button as an operating member for operating the switch 5, which is inserted through the hole 2a of the display board 2. It protrudes from the front, allowing the user to perform suppression operations from the front. Reference numeral 7 denotes a volume, which is attached to the printed circuit board 3, and has a knob 7b fitted into the tip of the shaft 7a. Surface 7C of knob 7b
Alternatively, letters and symbols are often printed near the knob 7b of the case 1. A recess 2b is provided at one end of the display board 2, and a hole 2C through which a shaft 7a passes is provided at the other end, and furthermore, on the back side, required characters and symbols 2e are printed on a solid printing section 2d corresponding to each button 6. ing.

Next, the operation of the above conventional example will be explained. Case l display board 2
At the part of the case l corresponding to the end of the adhesive part 1a,
The display board 2 is adhesively fixed to the case 1, and the concave part 2b of the display board 2 is illuminated by the light emitted from the lamp 4 provided on the printed circuit board 3, and this light is used as a guide to press the button 6 or the display board 2. The button 6 is guided to the shaft 7a of the volume 7, and the characters/symbols 2e on the solid printing section 2d are illuminated, and the vicinity of the knob 7b of the volume 7 is also illuminated through the hole 2C.

Problems to be Solved by the Invention However, in the conventional display device described above, the display plate 2 must be attached to the inside of the case 1. Therefore, mounting the display plate 2 requires a large amount of space. There was a problem that the display was difficult to see.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned problems of the prior art, and to provide a display device that can be made thinner, requires less installation space, and has high contrast.

Means for Solving the Problems In order to achieve the above object, the present invention aims to emit light from a light source provided inside the case of an electronic device, with a part inserted into the case and the other part on the operation surface of the case. The light is guided to the operating surface of the mounted display board, and the guided light is configured to illuminate both the operating member and the display printed on the back side of the display board of the operating surface.

Function Since the present invention is configured as described above, the display board can be mounted in a small space, and the printed characters can be illuminated with good contrast.

Example An embodiment of the present invention will be described below with reference to the drawings.

1 and 2, 11 is a case of an electronic device made of plastic material, 12 is a plate-shaped display board made of a transparent material such as acrylic resin, 13 is a boss provided inside the main picture of case 11, and 14 is a boss. 13 is a screw for fixing the printed circuit board 3; 15 is formed integrally with the case 11; 16 is a recess provided on the operating surface of the case 11 and has a depth close to that of the display board 12; 16 has a through hole 16a and is made of black, etc. A sheet of light-shielding plastic material, 17 is a retaining protrusion hole provided around the display board, 18 corresponds to the small hole 17, and the recess 1 of the case 11
A small hole provided in the side wall of 5, 19 an air layer, 20 a small hole, 2
1 is a protruding piece, 12a is a through hole of the button 6, and 12b is a cross section 3
A rectangular groove, 12c is a circular hole through which the shaft 7a passes, 15a
12d is a retaining hole provided at one end of the recess 15, and 12d is the hole 15.
The constricted stepped portion of the display board 12 corresponding to a, 12e, is a fixed end. The same reference numerals as in other Figures 5.6 represent the same names. Figure 4 shows the display board 12 and the sheet 16.
FIG. 3 is a reference diagram for explaining the shape of .

Next, the operation will be explained. First, a method for fixing the display board 12 will be described. As shown in FIG.
Insert the fixed end 12e into the hole 15a of 1).
The display plate 12 is rotated (in the direction of the arrow) so as to press the stepped portion 15a against the fulcrum (b), and the protruding piece 17 serving as a retaining means is engaged with the small hole 18 (c). At this time, the side wall 15b of the recess 15 is slightly bent and opened outward due to the elasticity of the plastic, and the protruding piece 21 is further engaged with the small hole 20. At this time, the elasticity of the display board 12 is used to facilitate attachment and to provide a sense of lifting. Subsequently, the display board 12 is inserted into the recess 15.
The display operation in a state where the image is fixed will be explained.

The light emitted from the lamp 4 attached to the printed circuit board 3 enters the display board 12 at the groove 12b, is divided into two parts and proceeds along the surface of the display board 12, and one side enters the space through the circular hole 12c. By emitting light and illuminating the periphery of the knob 7b, the display of characters and the like on the surface 7C or the vicinity 7d of the knob 7b can be easily seen even in a dark place. On the other hand, the other light enters the recess 15 at the stepped portion 12d and illuminates the button 6 of the switch 5 passing through the display panel 12 from inside. Further, a thin air layer 19 exists between the display characters/symbols 12e of various colors printed on the back surface near the button 6 of the display board 12 in correspondence with the button 6 and the sheet 16 located behind it. This has the effect of increasing the contrast between the characters/symbols 12e and the background compared to the case where the characters/symbols 2e and the solid printing portion 2d are provided on the same surface as in the conventional example. Note that the effect of the sheet 16 has been experimentally confirmed.

Effects of the Invention As explained above with reference to the embodiments, according to the present invention, the light emitted from the light source inside the case is guided to the operation surface of the case by a display plate having a simple structure and also serving as a light guide. This has the advantage that the mounting space for the display board can be reduced, and the print printed on the back side of the display board can be illuminated with high contrast by the light-shielding sheet provided at the rear of the display board.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a display device of an electronic device according to an embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 3 is an explanatory diagram for explaining the fixing operation of the display board, and FIG. 4 is a display FIG. 5 is a cross-sectional view showing the structure of a conventional display device, and FIG. 6 is a front view thereof. 4...Lamp, 5...Switch, 6...Button,
7... Volume, 11... Case, 12... Display plate, 12a... Through hole, 12b... Concave groove, 12C...
... circular hole, 15 ... recess, 15a ... hole, 16 ...
・Sheet. Name of agent: Patent attorney Toshi Nakao Haka1-G
Castle

Claims (1)

[Claims] A recess is provided in the operation surface of the case of an electronic device, and a light-shielding sheet is attached to the front surface of the recess, so that a part of the case is inserted into the case and the other part is inserted into the recess. It is guided to the operating surface of a plate-shaped display board mounted in front of the seat, and the guided light emitted lights up the operating member provided on the operating surface and penetrating the display board surface, as well as the operating member near the operating member of the display board. A display device for electronic equipment that displays characters and symbols printed on the back by illuminating them.