JPS62187379A - Liquid crystal display unit - 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] [Industrial Application Field] The present invention relates to a liquid crystal display device, and in particular: (1) a conductive rubber is disposed between a liquid crystal display element and a printed circuit board on which a liquid crystal driving LSI is mounted; The present invention relates to a sandwiching structure for a front panel in a liquid crystal display device in which a liquid crystal display element and a conductive rubber are sandwiched and fixed between a front panel and a printed circuit board by compressing rubber.

[Conventional technology]

As a conventional liquid crystal display device, for example, Utility Model Publication No. 58-311
What is shown in Publication No. 88 ζ is known.

In this structure, as shown in FIG. 3, a conductive rubber 3 is disposed between a liquid crystal display element 1 and a printed circuit board 2, and a front panel 4 is disposed on the liquid crystal display element 1. Then, the protrusion 4a provided on the end face of the front panel 4 is connected to the printed circuit board 2.
28G through the hole 28G, press the front panel 4 against the printed circuit board 2 side, apply a compressive force to the extent of the conductive rubber 31, bend the protrusion 4a of the front panel 4, and place the liquid crystal display element 1 and the conductive rubber 3 in front. It was clamped and fixed between the panel 4 and the printed circuit board 2.

[Problem that the invention seeks to solve]

In the conventional structure described above, the front panel 4 has protrusions 4a provided at several locations, so there is no support between the protrusions 4a. For this reason, when the protrusion 4a is bent and a compressive force to the extent of the conductive rubber 3i is applied, the portion of the printed circuit board 2 between the protrusions 4a bends as shown by the dotted line in Fig. 3 (ca). The dot was hot.

Ta.

An object of the present invention is to provide a liquid crystal display device that can prevent warping of a printed circuit board.

[Means for solving problems]

The above problem can be solved by providing a recess on the lower surface of the printed circuit board and providing a protrusion on the side surface of the front panel that elastically engages with the recess.

[Effect]

Since the printed circuit board is held down by the protrusion provided on the side surface of the front panel, that is, by the side surface of the front panel, bending is prevented.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. A conductive rubber 13 is arranged between the liquid crystal display element 11 and the printed circuit board 12. A recess 12a consisting of a hole, a groove, etc. is formed on the lower surface of the printed circuit board 12. A cut-out portion 14a is formed on the side surface of the front panel 14 from below toward the lower surface of the printed circuit board 12, and the recess 12at is formed at the tip of the cut-out portion 14a.
A protrusion 14b that engages with this is formed.

Therefore, the front panel 14 is placed on top of the liquid crystal display element 11, and the convex portion 14b of the front panel 14 is engaged with the concave portion 12af of the printed circuit board 12. From this point, the liquid crystal display element 11, conductive rubber 13, and printed circuit board 12 are connected to the front panel 1.
It is clamped and fixed by 4G.

In this way, the printed circuit board 12 is attached to the side of the front panel 14.
Since the convex portion 14b that elastically engages with the concave portion 12a is provided, the printed circuit board 12 is pressed by the entire side surface of the front panel 14, and deflection of the printed circuit board 12 is prevented. Furthermore, the engagement between the convex portion 14b and the concave portion 12a alleviates outward warpage and expansion of the side surface of the front panel 14, and also helps in positioning the front panel 14. Just by fitting the convex portion 14b of the front panel 14 into the concave portion 12a of the printed circuit board 12, a compressive force to the extent of the conductive rubber 13f can be applied, so the front panel 14 can be attached with one touch, improving work efficiency. do.

〔Effect of the invention〕

According to the present invention, when the printed circuit board is prevented from being bent, the workability of attaching the front panel is improved.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention, FIG. 2 is a front panel of FIG. 1, la) is an enlarged front view, and ([
)) is an enlarged side view, FIG. 3 shows a conventional example, lal is a plan view, (1)) is a side sectional view, and (c) is a schematic front partial sectional view. DESCRIPTION OF SYMBOLS 11...Liquid crystal display element, 12...Printed circuit board, 12...concave portion, 13...conductive rubber, 14...front panel, 14a...cut-out portion, 14b...convex portion . Eight (J

Claims (1)

[Claims] 1. A liquid crystal display device in which a conductive rubber is disposed between a liquid crystal display element and a printed circuit board, and the conductive rubber is compressed to sandwich and fix the liquid crystal display element and conductive rubber between a front panel and a printed circuit board. A liquid crystal display device, characterized in that a recess is provided on the lower surface of the printed circuit board, and a convex portion is provided on the side surface of the front panel to elastically engage with the recess of the printed circuit board.