JPS60227234A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To simplify assembly by providing holes for passing the positioning pins erected to assembling jigs to prescribed positions and holes to permit movement of movable pins of the assembling jigs for positioning a liquid crystal display element to a printed wiring board. CONSTITUTION:A device is constituted of the printed wiring board (PWB)10, a case 20 to be attached onto said board and the liquid crystal element 30 to be disposed in the space thereof. The positioning holes 11-13 and holes 14, 15 are formed through the PWB10. The holes 11-13 are used for unequivocal positioning by being inserted with the positioning pins 51-53 fixed to the assembling jigs not shown. The holes 14, 15 are inserted with the movable pins 54, 55 erected to the jigs and are made into an elliptical shape to permit smooth movement of the pins 54, 55. The lugs 24 of the case 20 are passed into the holes 16. The case 20 has the holes 25-29 (partly not shown) for insertion of the pins 51-55 at the ceiling thereof and is provided with a window 23 for display. The display element 30 provided in the window 23 is fixed via conductive rubber 40 to the PWB10. The assembly is thus accurately and easily executed with the simple device.

Description

[Detailed description of the invention] Technical fields> The present invention relates to a liquid crystal display device.

<Prior Art> There are conventional methods for assembling liquid crystal display devices.

■ Assemble using the device case or a specific end face of the liquid crystal display element as a reference.

■ Positioning marks are provided on both the liquid crystal display element and the printed wiring board, and these marks are read optically and assembled by overlapping the marks.

In the case of (2), this method is generally used for calculations, clocks, etc., and is the simplest method, but the accuracy is low. In the case of (2), the method is used for high-definition, large-capacity dot matrices, and high-precision assembly is possible, but the assembly is complicated.

For this reason, a method for easily assembling medium-accurate liquid crystals has been desired, mainly for medium-capacity dot matrix liquid crystals.

<Objective of the Invention> An object of the present invention is to eliminate the drawbacks of the above-mentioned prior art, and to provide a liquid crystal display device that ensures a certain degree of accuracy in the positional relationship between a liquid crystal display element and a printed wiring board and is easy to assemble. .

<Structure of the Invention> A liquid crystal display device in which a liquid crystal display element is arranged in an inner space formed by a printed wiring board and a case attached thereon, wherein the printed wiring board is mounted on a device assembly jig. a positioning hole that is inserted in a fixed positional relationship with respect to a positioning pin that is set upright; and a positioning hole that is set upright in the assembly jig for positioning the liquid crystal display element by pressing it against the positioning pin. The movable bottle is characterized by having a hole through which the movable bottle can be inserted without interfering with its movement.

<Example> First is a plan view of a liquid crystal display device showing an example, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a plan view of a printed wiring board.

The device includes a printed wiring board (hereinafter referred to as PWB) 10 and a case 20 mounted on it. and a liquid crystal display element 30 disposed within the inner space. Liquid crystal display element 30 and PWB
10 is made of conductive rubber 40 and the like for electrical connection.

The PWB 10 has positioning holes 11, 12, 13 and hole 1.
4.15 are formed through each. Positioning hole 11
, 12.13 are PWBs for positioning pins 51° 52.53 fixedly erected on a device assembly jig (not shown).
10 is a hole through which the hole is inserted in a fixed positional relationship.

That is, by fitting the PWB 10 into the positioning pins 51, 52, 53 through the holes 11, 12, 13, the position relative to the positioning pins 51, 52, 53 is uniquely determined. The holes 14.15 are holes through which movable pins 54.55 installed upright on the device assembly jig are inserted.
The movable pins 54 and 55 are formed in an elongated oval shape in the moving direction of the movable pins 54 and 55 so as not to interfere with the movement of the movable pins 54 and 55.

Reference numeral 16 denotes a slit hole into which a claw 24 of a case 20, which will be described later, is fitted.

The case 20 consists of an entrance part 21 and a side wall part 22,
The entrance section 21 is provided with a display window 23, and the side wall section 22 is provided with a display window 23.
A fixing claw 24 is formed at the lower end of the holder. In addition, positioning pins 51 and 52 of the device assembly jig are provided on the front surface part 21.
．． 53 and movable pins 54 and 55 through holes 25 and 26.
, 27, 28° 29 are formed through. Movable pin 54
．． The holes 28, 29 through which the movable pins 54, 55 are inserted are formed in an elongated oval shape in the direction of movement of the movable pins 54, 55 so as not to obstruct the movement of the movable pins 54, 55.

The display element 30 is sandwiched between two glass plates and is placed at a position facing the window 23 of the case 20. This display element 30 has the case 20 connected to the claw 24.
When it is fixed by bending, it is fixed in a pressed state to the PWB 10 via the conductive rubber 40.

The display element 20 is aligned with the PWB 10 during device assembly. That is, when the drawing in FIG. 2 is turned upside down, the pins 51, 52, 5 of the device assembly jig are
First, insert the case 20 into the case 3,54.
2, 53, 54° 55 and the slit hole 16
into the claw 24 of the case 20. At this point, the case 20 is held with sufficient play with respect to the pins 51, 52, 53, 54, and 55. In addition, PWBIO has positioning holes 11, 12 by positioning pins 51, 52, and 53.
．． The position is determined within the clearance with 13. Note that there is play between the slit hole 16 and the claw 24, so
Case 20 and PWBlo have not yet been combined. In this state, the display element 30 moves the two adjacent sides 31.32 (see FIG. 3) by the movable pins 54.55 to the P arrow and the Q arrow.
Pushed to the arrow mark, the remaining two sides 33 and 34 are the positioning pins 51
Positioning is achieved by abutting at 52.53°. The movable pins 54 and 55 are shaped like P arrows using a device assembly jig.

The display element 30 can be pushed in the direction of the Q arrow using a spring or a magnet. When the display element 30 has been positioned, the display element 30 can be moved by bending the tabs 24 while pressing the case 20 toward the PWB 10.
and the entire fixing is completed.

As is clear from the above, the accurate positional relationship between the PWB 10 and the liquid crystal display element 30 is ensured through the positioning pins 51, 52, and 53. On the other hand, since the case 20 is not directly involved in positioning the liquid crystal display element 30 and the PWB 10, assembly work is easy.

Note that the positioning pins 51, 52, and 53 are, for example, pins 51, 52, and 53.
and pin 53, PWB 10 and liquid crystal display element 30
The pin 52 is not necessary because the positioning of the pin 52 can be performed. According to this, the positioning holes 11, 12 of the PWB 10.
Among the holes 13, the holes 12 can also be omitted.

<Effects> With the above configuration, the present invention can maintain the positional relationship between the PWB and the liquid crystal display element with relatively high accuracy. Moreover, the case and the like do not directly affect the mutual positional relationship between the PWB and the liquid crystal display element, and the assembly is centered only on the positional relationship between the PWB and the liquid crystal display element, which simplifies the configuration of the device. Assembly can be easily performed by using an assembly jig having positioning pins and movable pins.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a liquid crystal display element showing an embodiment of the present invention;
FIG. 2 is a sectional view taken along the line AA in FIG. 1, and FIG. 3 is a plan view of the printed wiring board (PWB). 10-Printed wiring board (PWB) 11, 12. 13-positioning hole 14, 15-hole 20-case 25.26.27, 28.29-hole 30-liquid crystal display element 40-conductive rubber 51, 52.
53-Positioning pin 54.55-・Movable pin Patent applicant: Sharp Corporation Representative Patent attorney Arata Nishida

Claims (1)

[Claims] A liquid crystal display device in which a liquid crystal display element is arranged in an inner space formed by a fi+ printed wiring board and a case attached thereon, wherein the printed wiring board is used for device assembly. A positioning hole is inserted in a fixed positional relationship with respect to a positioning pin set upright in the jig, and a positioning hole is inserted into the assembly jig in order to position the liquid crystal display element by pressing it against the positioning pin. 1. A liquid crystal display device comprising a hole through which a movable pin is inserted without interfering with movement of the movable pin. (2) The liquid crystal display device according to claim 1, wherein the case has holes through which the positioning pins and movable pins are inserted without interfering with movement of the pins. (3) The case is fixed to the printed wiring board with the liquid crystal display element and conductive rubber for electrical connection disposed between the element and the printed wiring board pressed and fixed to the printed wiring board side. A liquid crystal display device according to claim 1 or 2.