JPS61180358A - Display device 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 The present invention relates to a display device for displaying characters in electronic calculators and other electronic devices.

As this type of display device, for example, one having a liquid crystal display, the liquid crystal display is generally fixed directly onto a printed circuit board having an arithmetic operation function using metal fittings or the like. In this case, the electrical signal connection between the display and the printed circuit board is performed by a conductive elastic body interposed between the two. However, since the signal pattern of many displays is formed only on one side, if the conductive elastic body is placed on the signal pattern side and the display is pressed with a metal fitting, the display may tilt slightly. Another problem is that the signal patterns do not contact each other uniformly. Furthermore, the LCD display has a metal reflector attached to its back.
If a signal pattern on the printed circuit board is located opposite to the reflector, there is a risk that the reflector may short-circuit the adjacent signal patterns. In order to deal with these problems, an insulating sheet or the like is interposed between the back surface of the display and the printed circuit board, but the levelness of the display, the connection state, etc. are not sufficiently good.

The present invention was proposed in view of the above-mentioned problems, and an insulating elastic body is interposed at the other position facing the signal pattern side of the display device, and by cooperating with the conductive elastic body on the signal pattern side. The purpose is to keep the display horizontal and make a good signal connection. Another purpose is to completely insulate the reflective plate on the back of the display from the signal pattern on the bullet board using both elastic bodies.

The drawings will be explained below.

FIG. 1 shows an electronic desktop calculator 1, in which 2 is a display section and 3 is a keyboard. Figure 882 shows a conventional example, in which an insulating sheet 5 is placed on a printed circuit board 4, a reflective plate 6a of a liquid crystal display 6 is superimposed on the top surface of the insulating sheet 5, and the signal pattern of the display 6 and the printed circuit board 4 are The display device 6 is fixed to the printed circuit board 4 with a metal fitting 8 with a conductive elastic body 7 interposed therebetween. According to this method, as mentioned above, there is a risk that the display 6 may be tilted due to the height of the conductive elastic body 7, and due to the tilt, it becomes impossible to firmly hold the display 6 within the metal fitting 8. Due to the looseness, a reliable electrical signal connection by the conductive elastic body 7 cannot be obtained.

:frj Figures 3 to 5 show an embodiment of the present invention, -
An insulating spacer 1O is used which has an elastic protrusion 10b near the force end and a through hole 10c near the other end. The insulating spacer 10 of this example is a plate-shaped molded body made entirely of synthetic resin, and the elastic protrusions 10b are in the shape of arcuate convex ribs and are provided at two locations on the left and right along one longitudinal edge of the spacer plate. . The through hole 10c is formed in the shape of a long groove (slit) along the other longitudinal edge of the spacer plate. 4a is printed wiring on the fourth surface of the printed circuit board, and 4b is a signal pattern portion.

Then, the spacer 10 described above is superimposed on the printed circuit board 4, with the through hole 10c of the spacer positioned corresponding to the signal pattern section 4b of the printed circuit board 4, and the rectangular bar-shaped conductive elastic body 7 is placed in the through hole LOc. The spacer 10 and the display 6 are fitted onto the spacer 10, and the display 6 is superimposed on the spacer 10, and the spacer 10 and the display 6 are entirely fixed to the printed circuit board 4 with the metal fittings 8.

The conductive elastic body 7 is positioned by fitting the spacer lO into the through hole 10c, and the display 6 is positioned between the conductive elastic body 7 and the arcuate protrusion 10b of the spacer located opposite thereto.
-10b and is held horizontally to the printed circuit board 4 by the elasticity of the shade, and the signal pattern portion 4b on the printed circuit board 4 side and the signal pattern portion on the display 6 side are connected via the conductive elastic body 7. The electrical signal connection status of the terminal becomes reliable and good. Furthermore, the flat portion 10a of the spacer 10 prevents sheeting from occurring on the reflective plate 6a on the back surface of the display.

Since the conductive elastic body 7 is positioned by fitting into the through hole 10c of the spacer IO, contact between the conductive elastic body 7 and the metal fitting 8 is also prevented.

As described above, the present invention can improve the levelness of the display and the electrical signal connection, and is particularly useful as a display device for electronic equipment having a liquid crystal display.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an electronic desk calculator, FIG. 2 is a cross-sectional view of a conventional display device, and FIG. 3 is the same diagram as above of an embodiment of the present invention.
FIG. 4 is an exploded perspective view of the constituent members. FIG. 5 is a perspective view of the spacer. 4 is a printed circuit board, 6 is a display, 7 is a conductive elastic body, 8
9 is a metal fitting, 9 is an insulating elastic body, and 10 is a spacer. Figure 4 Figure 1 Figure 2 Figure 3 Chi4 /L/

Claims (2)

[Claims] (1) An insulating spacer having an elastic protrusion near one end and a through hole near the other end is interposed between the display and the printed circuit board, and a conductive elastic material is inserted into the through hole of the spacer. A display device for an electronic device, in which the display device and a printed circuit board are connected by fitting. (2) A display device for an electronic device according to claim 1, wherein the elastic projections of the spacer form a plurality of arc shapes, and the through holes form a long groove shape.