JPH09218394A - Liquid crystal display plate fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to decrease the number of parts over the entire part of a liquid crystal display device and to simplify the assembly stage thereof. SOLUTION: Recessed parts 5b and pawls 5c for fixing are formed respectively at two points each at side end edges of a receiving table 5. The liquid crystal display plate fixture 1 for fixing the flexible circuit board 3, zebra 4 and liquid crystal display plate 2 superposed on this receiving table 5 is composed of a transparent acrylic resin and the lower part thereof is formed with the pawls 5 for fixing nested with the recessed parts 5b and engaging pawls 1g. A thick part 1a of a shape to be fitted into the opening formed in the cover of an electronic apparatus is formed atop this table.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display plate fixing tool for fixing a liquid crystal display plate inside an electronic device in a state where display information can be visually recognized from the outside of the electronic device.

[0002]

2. Description of the Related Art A liquid crystal display panel used in an electronic device or the like and a circuit board inside the electronic device are connected by a zebra (conductive rubber and insulating rubber striped between the liquid crystal display plate and the circuit board. Rubber is arranged in a rectangular shape). Therefore, it is necessary to bring this zebra into pressure contact with the electrodes and the circuit board on the back surface of the liquid crystal display panel. Therefore, conventionally, a fixture for fixing the liquid crystal display plate to the rigid member inside the electronic device with the zebra and the flexible circuit board sandwiched (or fixing the liquid crystal display plate to the rigid circuit board with the zebra sandwiched) has been used. There is.

The structure of such a conventional liquid crystal display panel fixture is shown in FIGS. 5 is a top view of the liquid crystal display unit of the electronic device, FIG. 6 is a vertical cross-sectional view taken along line VI-VI of FIG. 5, and FIG. 7 is a vertical cross-sectional view taken along line VII-VII of FIG. It is a figure.

As shown in these figures, three support protrusions 51 are formed on both side surfaces of a table-shaped pedestal 50 formed on the upper surface of the frame in the electronic device. Further, between the support protrusions 51 on the side surface of the pedestal 50,
A fixing claw 52 is formed on each of them. This cradle 50
A flexible circuit board 53 is disposed on the upper surface of the. A zebra 54 is placed on the connection land formed on the upper surface of the flexible circuit board 53. Further, a liquid crystal display plate 55 is laid on the zebra 54 so that the connection terminals formed on the back surface thereof are electrically connected to the zebra 54.

The liquid crystal display plate 55 is fixed on the pedestal 50 by a metal liquid crystal display plate fixing tool 56. An opening 56a corresponding to the information display surface of the liquid crystal display plate 55 is formed in the center of the liquid crystal display plate fixture 56, and a bent portion that functions as a stopper for preventing the liquid crystal display plate 55 from being displaced is formed on its four sides. 56b is formed. The bent portions 56b located on both sides of the pedestal 50 are in contact with the support protrusions 51 of the pedestal 50,
The entire liquid crystal display plate fixture 56 is positioned in height. An engagement ring portion 56c that engages with the fixing claw 52 of the pedestal 50 is further formed to project from the bent portion 56b. When the engaging ring portion 56c engages with the fixing claw 52, the zebra 54 is compressed and deformed and is pressed against the flexible circuit board 53 and the liquid crystal display plate 55, and the liquid crystal display plate fixture 56 is received by the pedestal. It is fixed on 50.

On the other hand, a cover 57 of the electronic device is arranged at a position slightly separated from the liquid crystal display plate fixing tool 56. An opening 57a having the same shape as the opening 56a of the liquid crystal display plate fixture 56 is formed in the cover 57, and a liquid crystal window 58 made of an acrylic plate is formed in the opening 57a.
Is inlaid. As a result, the information displayed on this liquid crystal display panel can be visually recognized from the outside.

[0007]

As described above, the conventional liquid crystal display plate fixing member 56 and the liquid crystal window 58 are completely independent separate parts and are assembled to the liquid crystal display part by separate assembling steps. .

The present invention has been made to solve the above problems. That is, an object of the present invention is to provide a liquid crystal display panel fixture that can reduce the number of components of the entire liquid crystal display unit and can simplify the assembly process.

[0009]

In order to solve the above-mentioned problems, a liquid crystal display panel fixing device according to the present invention is a liquid crystal display plate fixing device for fixing a liquid crystal display plate on a rigid member inside an electronic device. A transparent portion that covers the liquid crystal display plate, a leg portion that engages with the rigid member, and when the leg portion engages with the rigid member, the liquid crystal display plate is brought into contact with the rigid member by the rigid member. It is characterized by integrally having a pressing portion which presses it upward (corresponding to claim 1).

The rigid member inside the electronic device may be a frame inside the electronic device or a rigid circuit board. To connect the liquid crystal display board and the circuit board, lead wires may be connected to the terminals of the liquid crystal display board, but this is done via a conductive rubber such as zebra arranged between the circuit board and the liquid crystal display board. May be. In this case, when the rigid member in the electronic device is a frame, the circuit board and the conductive rubber are sandwiched between the frame and the liquid crystal display board,
The liquid crystal display plate may be fixed by the liquid crystal display plate fixing tool according to the present invention. The transparent part and the pressing part may be formed as separate parts or may be formed as the same part. That is, the liquid crystal display plate may be pressed by the flat transparent part itself, or the pressing part may press the liquid crystal display plate in a state where the transparent part and the liquid crystal display plate are separated from each other. The liquid crystal display panel fixing tool may be formed so that at least the material of the transparent portion is a transparent member, but the entire liquid crystal display panel fixing tool may be formed of a transparent member.

According to a second aspect of the present invention, there is provided a liquid crystal display panel fixing tool, wherein the transparent portion according to the first aspect has a thick portion projecting in a shape to fit into an opening formed in the cover of the electronic device. It was done. According to this structure, the opening of the cover is closed by the thick portion, so that the function as the liquid crystal window can be more fully exhibited.

The liquid crystal panel fixing device according to a third aspect is specified by the pressing portion according to the second aspect being formed at a peripheral position of the thick portion. In this way, even if external pressure is applied to the thick portion, this information is not applied to the information display area of the liquid crystal display panel located on the back side of the thick portion, so that the displayed contents are difficult to see. Never.

A liquid crystal display panel fixture according to a fourth aspect of the invention is specified in that the leg portion of the first aspect has an engaging claw that engages with an engaged portion formed on the rigid member at its tip. It is a thing. According to this structure, the liquid crystal display panel fixture can be fixed to the rigid member with a simple structure such as engagement between the engaging claw and the engaged portion.

The liquid crystal panel fixing device according to the fifth aspect is specified by being entirely made of a transparent member. According to this structure, the liquid crystal display panel fixture can be easily integrally formed by injection molding or the like.

The liquid crystal panel fixing device according to a sixth aspect is specified by further including a frame portion for preventing the liquid crystal panel from moving in a direction parallel to the rigid member. According to this structure, the liquid crystal display plate can be positioned without pressing the liquid crystal display plate firmly by the pressing portion.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 2 is a top view of a liquid crystal display portion of an electronic device in which the liquid crystal display panel fixture 1 according to the embodiment of the present invention is used, and FIG. 3 is a vertical cross section taken along line III-III of FIG. 4 is a vertical cross-sectional view taken along the line IV-IV in FIG. 2. In addition, FIG. 1 is an exploded view of the liquid crystal display unit. Here, the electric device is, for example, a camera. In addition, in the following, FIG. 1, FIG. 3 and FIG.
The description will be made assuming that the upper side of is the upper side of the liquid crystal display unit. (Structure of Liquid Crystal Display Unit) As shown in these drawings, a flexible circuit board 3 is laid on a pedestal (rigid member) 5 formed on the upper surface of the frame of the electronic device. The liquid crystal display board 2 is arranged on the flexible circuit board 3 with the zebra 4 interposed therebetween. The liquid crystal display plate fixture 1 is fixed to the cradle 5 so as to cover the liquid crystal display plate 2.

Hereinafter, each of these constituent members will be described in detail. First, on both side edges of the upper surface of the pedestal 5, linear projecting edge portions 5a for preventing the displacement of the flexible circuit board 3 are formed. However, the linear projecting edge portion 5a is cut out at a portion where the liquid crystal display panel fixture 1 is arranged. Then, the linear protruding edge portion 5a is formed on both side edges of the pedestal 5 in the portion where the linear protruding edge portion 5a is cut out.
Two rectangular recesses 5b having the same width as a are formed at two locations. On the outside of each recess 5b, a fixing claw (engaged part) 5c facing the recess 5b is held by an arm 5d so as to be flush with the upper surface of the pedestal 5. The fixing claws 5c and the arms 5d are formed of synthetic resin integrally with the pedestal 5.

Both linear projecting edges 5 on the upper surface of the cradle 5
The flexible circuit board 3 disposed between a and 5a is connected to an information device internal circuit (not shown) and has a wiring pattern (not shown) electrically connected to the information device internal circuit. . On the flexible circuit board 3, connection lands (not shown) for electrically connecting the wiring pattern to the liquid crystal display board 2 are formed side by side along the longitudinal direction of the flexible circuit board 3.

The zebra 4 is mounted on the flexible circuit board 3 such that the conductive rubber portions (black portions in FIG. 1) of the zebra 4 are in contact with the connection lands on the flexible circuit board 3.

The liquid crystal display panel 2 is, for example, a reflection type STN.
A (super-twisted nematic) liquid crystal plate is used, and a desired character or figure is displayed by selectively applying a voltage to a plurality of electrodes E formed in a predetermined shape in advance. In order to apply a voltage to these electrodes E from the outside, the back surface of the liquid crystal display panel 2 (flexible circuit board 3
On the side surface), a plurality of terminals electrically connected to the respective electrodes E are formed. The plurality of terminals are arranged at the same pitch according to the stripes of the zebra 4. The liquid crystal display board 2 is placed on the zebra 4 so that the plurality of terminals are electrically connected to the conductive rubber portions of the zebra 4. As a result, the connection lands on the flexible circuit board 3 and the terminals of the liquid crystal display panel 2 are electrically connected to each other through the conductive rubbers forming the zebra 4. The protrusion 2 a formed on the short side edge of the liquid crystal display plate 2 is a liquid crystal injection portion into the liquid crystal display plate 2.

The liquid crystal display panel fixture 1 is formed by injection molding of transparent acrylic resin, and has a rectangular shape having the same width as the pedestal 5 when viewed from the upper surface side. The liquid crystal display plate fixture 1 also serves as a liquid crystal window for allowing the information displayed on the liquid crystal display plate 2 to be visually recognized from the outside. Therefore, in the center of the upper surface of the liquid crystal display plate fixture 1, the liquid crystal display plate 2
A rectangular thick portion (transparent portion) 1a wider than the formation region of the electrode E above is formed. This thick portion 1a is
As shown in FIGS. 3 and 4, the opening 6a has substantially the same shape as the opening 6a formed in the cover 6 of the electronic apparatus, and the back side of the cover 6 is fitted into the opening 6a. 3 and 4
As shown in FIG. 3, the liquid crystal display panel fixture 1 has a recessed portion 1h, which is recessed parallel to the other portion, on the back surface of the fixture 1 so as to correspond to the position of the thick portion 1a. The liquid crystal display board 2 is
Around the depression 1h (pressing portion), the liquid crystal display panel fixture 1 is contacted and pressed. Therefore, since the thick portion 1a and the liquid crystal display plate 2 are separated from each other, even if the thick portion 1a is externally pressed, the information display area of the liquid crystal display plate 2 is not pressed. As a result, there is no problem in that the brightness of the display is reversed and the display content becomes difficult to see.

A box-shaped frame portion 1b is integrally formed on the back side of each edge of the liquid crystal display panel fixture 1 (on the side of the cradle 5). The height of the frame portion 1b is slightly lower than the total thickness of the zebra 4 and the liquid crystal display panel 2. Then, the end of the frame portion 1b comes into contact with the upper surface of the receiving table 5, so that the liquid crystal display panel 2,
The accommodation space for the zebra 4 and the flexible circuit board 3 is formed. The liquid crystal display panel 2 accommodated in the accommodation space thus formed is prevented from moving in the direction parallel to the upper surface of the pedestal 5 by the frame portion 1b. The flexible circuit board 3 is passed through the frame portion 1b on the shorter edge side when the flexible circuit board 3 comes into contact with the pedestal 5.
A notch 1c having the same width and the same height as is formed. Further, a notch 1d for avoiding interference with the protrusion 2a of the liquid crystal display panel 2 is formed at the center of the notch 1c. On the other hand, on the longitudinal edge side of the frame portion 1b, notches 1e are formed at two positions corresponding to the positions of the respective recesses 5b of the receiving table 5. A leg portion 1f is integrally formed in the central portion of each notch 1e so as to extend along the protruding direction of the frame portion 1b. At the tip of each leg 1f, the end of the frame 1b is attached to the pedestal 5
Engaging claw 1 that engages with the fixing claw 5c when contacting the upper surface of the
g is formed. (Assembling process of liquid crystal display unit) To assemble the liquid crystal display unit configured as described above, before covering the frame of the electronic device with the cover 6, the flexible circuit board 3 connected to the internal circuit is linearly moved. It is pulled through the upper surface of the pedestal 5 so as to be sandwiched between the projecting edge portions 5a, 5a. Next, the zebra 4 is placed on the connection lands formed on the upper surface of the flexible circuit board 3. Then, the liquid crystal display panel 2 is placed on the zebra 4 so that the conductive rubbers of the zebra 4 are electrically connected to the terminals formed on the back surface thereof.

Next, the liquid crystal display plate fixture 1 is attached to the liquid crystal display plate 2.
The liquid crystal display panel fixture 1 is pressed against the pedestal 5 against the elasticity of the zebra 4. Then, each leg 1f
When the engaging claw 1g comes into contact with the fixing claw 5c, the engaging claw 1g bends inward and enters the recess 5b of the pedestal 5. Then, the end of the frame portion 1b of the liquid crystal display panel fixing tool 1 is attached to the pedestal 5
When contacting the upper surface of the
The engaging claw 1g of f is engaged with the fixing claw 5c of the pedestal 5.
In this state, the flexible circuit board 3 is pressed against the upper surface of the pedestal 5 by the elastic force of the zebra 4, and
The liquid crystal display plate 2 is pressed against the inner surface of the liquid crystal display plate fixture 1,
Firmly fixed.

Next, while fitting the thick portion 1a of the liquid crystal display plate fixing tool 1 into the opening 6a of the cover 6, the cover 6 is fixed by covering the frame of the electronic device. In this state, since the thick portion 1a functions as a liquid crystal window, when viewed from the outside of the cover 6, the liquid crystal display panel 2 inside the thick portion 1a is seen.
The displayed contents can be visually confirmed. Moreover, since there is no gap between the thick portion 1a and the opening 6a, dust and the like will not enter the inside of the electronic device.

[0025]

Since the liquid crystal display panel fixing device of the present invention having the above-described structure is constructed as one component integrated with the liquid crystal window, the number of components of the entire liquid crystal display device in which it is used is reduced. In addition, the assembly process can be simplified.

[Brief description of drawings]

FIG. 1 is an exploded view of a liquid crystal display unit using a liquid crystal display panel fixture according to a first embodiment of the present invention.

FIG. 2 is a top view of the liquid crystal display unit of FIG.

FIG. 3 is a vertical sectional view taken along the line III-III in FIG.

FIG. 4 is a vertical sectional view taken along line IV-IV of FIG.

FIG. 5 is a top view of a conventional liquid crystal display unit.

6 is a vertical sectional view taken along line VI-VI in FIG.

FIG. 7 is a vertical cross-sectional view taken along the line VII-VII of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid crystal display board fixing tool 1a Thick part 1f Leg part 1g Engaging claw 2 Liquid crystal display board 5 Cradle 5b Recess 5c Fixing claw

Claims (6)

[Claims] 1. A liquid crystal display plate fixing tool for fixing a liquid crystal display plate on a rigid member inside an electronic device, the transparent part covering the liquid crystal display plate, and a leg part engaging with the rigid member. A liquid crystal display plate fixing tool, which integrally includes a pressing portion that comes into contact with the liquid crystal display plate when the legs are engaged with the rigid member and presses the liquid crystal display plate onto the rigid member. 2. The liquid crystal display panel fixing device according to claim 1, wherein the transparent portion has a thick portion protrudingly formed into a shape that fits into an opening formed in the cover of the electronic device. 3. The liquid crystal display panel fixture according to claim 2, wherein the pressing portion is formed at a peripheral position of the thick portion. 4. The liquid crystal display panel fixing tool according to claim 1, wherein the leg portion has an engaging claw at an end thereof for engaging with an engaged portion formed on the rigid member. 5. The liquid crystal display panel fixing device according to claim 1, wherein the entire structure is made of a transparent member. 6. The liquid crystal display plate fixing device according to claim 1, further comprising a frame portion for preventing movement of the liquid crystal display plate in a direction parallel to the rigid member.