JPH11212486A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve assemblability of a surface light emission plate and to make a liquid crystal display board small-sized. SOLUTION: A liquid crystal display board 14 and a surface light emission plate 5 are attached to a plate 12 placed on a printed board 1, and a lead line 5a of the surface light emission plate 5 is inserted to a through hole 1c of the printed board 1 to connect this plate 5 to a printed circuit. In this liquid crystal display device, the plate 12 is provided with a guide part 12d which guides the lead line 5a of the surface light emission plate 5 at the time of inserting it to the through hole 1c of the printed board 1.

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 device capable of improving the assemblability of a surface light emitting plate and reducing the size of the liquid crystal display plate.

[0002]

2. Description of the Related Art Conventionally, as a liquid crystal display device, as shown in FIGS. 9 and 10, a plate 2 is mounted on a printed circuit board (PCB) 1 and a rubber connector 3 fitted in a mounting hole 2a of the plate 2 is mounted. Of the terminal 3a of the printed circuit board 1 and a liquid crystal display (LCD) 4 and a surface emitting plate (EL) on the upper frame 2b of the plate 2.
After the holder 6 is fitted to the plate 2 and the hook portion 6a of the holder 6 is inserted into the hook hole 1b of the printed circuit board 1 and bent and locked, whereby the holder is folded. 6, the liquid crystal display plate 4, the surface light emitting plate 5, and the plate 2 are fixed to the printed circuit board 1.

The upper end of the terminal 3a of the rubber connector 3 contacts a terminal portion (not shown) of the liquid crystal display panel 4, and the liquid crystal display panel 4 is connected to the printed circuit of the printed circuit board 1 via the rubber connector 3. .

A pair of lead wires (terminals) 5 a of the surface light emitting plate 5 is connected to each through hole 1 c of the printed circuit board 1.
And connected to a printed circuit by soldering or the like.

[0005]

However, each lead wire (terminal) 5a of the surface light emitting plate 5 is a very thin electric wire, and the through hole 1c of the printed circuit board 1 is a small hole corresponding to this. From each lead wire (terminal) 5a of the surface light emitting plate 5 to each through hole 1c of the printed circuit board 1.
However, there is a problem that the work of inserting the surface light-emitting plate 5 is troublesome and the assemblability of the surface light-emitting plate 5 is hindered.

Since the liquid crystal display panel 4 and the surface light emitting plate 5 are fitted inside the upper frame portion 2b of the plate 2, the liquid crystal display panel 4 is connected to the light emitting portion 5b of the surface light emitting plate 5. Since it is necessary to have an outer shape including the outer peripheral sealing portion 5c, there is a problem that the size of the liquid crystal display panel 5 is increased and the cost is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a liquid crystal display device capable of improving the assemblability of a surface emitting plate and reducing the size of the liquid crystal display plate. It is assumed that.

[0008]

In order to solve the above-mentioned problems, the present invention is to attach a liquid crystal display panel and a surface light emitting plate to a plate mounted on a printed circuit board, and connect the lead wires of the surface light emitting plate to the above. In a liquid crystal display device connected to a printed circuit by being inserted into a through hole of a printed circuit board, the plate is provided with a guide portion for guiding a lead wire of the surface light emitting plate when the lead wire is inserted into the through hole of the printed circuit board. A liquid crystal display device is provided.

According to the present invention, when the surface light-emitting plate is mounted on the plate placed on the printed circuit board, the lead wires of the surface light-emitting plate are guided by the guide portions provided on the plate and are automatically inserted into the through holes of the printed circuit board. Will be plugged in.

[0010] Thereby, the lead wire (terminal) of the surface emitting plate
Can be easily and quickly inserted into the through hole of the printed circuit board, and the assembling property of the surface light emitting plate is improved. Further, since the guide portion can be provided integrally with the plate, the provision of the guide portion does not increase the cost.

According to a second aspect of the present invention, the guide portion is provided with a hole for inserting a lead wire of the surface light-emitting plate. The insertion opening of the hole may be configured to have a tapered shape.

With this configuration, the lead wire of the surface light emitting plate is simply inserted into the tapered insertion hole of the guide portion of the plate, and the lead wire is guided by the insertion hole of the guide portion and is inserted into the through hole of the printed circuit board. Automatically plugged in. Further, since the insertion hole of the insertion hole is tapered, the tip of the lead wire is smoothly guided from the insertion hole to the through hole through the insertion hole.

According to a third aspect of the present invention, the guide portion is provided with a groove for inserting a lead wire of the surface light-emitting plate. The groove bottom of the groove may be formed in a curved shape.

With this configuration, the lead wire of the surface light emitting plate is simply inserted into the insertion groove of the guide portion of the plate.
The lead wire is guided by the insertion groove of the guide portion and is automatically inserted into the through hole of the printed circuit board. In addition, since the groove bottom of the insertion groove is curved, the tip of the lead wire is smoothly guided from the insertion groove to the through hole.

According to a fourth aspect of the present invention, the plate is provided with a positioning portion for holding the outer periphery of the liquid crystal display panel against the outer periphery and positioning the liquid crystal display panel with the light emitting portion of the surface light emitting plate. Can be.

With this configuration, the liquid crystal display panel is stopped by the positioning portion of the plate and is positioned on the light emitting portion of the surface light emitting plate. Therefore, the size of the liquid crystal display panel can be reduced and the cost can be reduced.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings. Note that the same components and operations as those of the prior art are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 1, the liquid crystal display device comprises a printed circuit board 1, a plate 12, a rubber connector 3,
It comprises a surface light-emitting plate 5, a liquid crystal display plate 14, and a holder 6.

Plate 1 placed on printed circuit board 1
2, a mounting hole 12a for the rubber connector 3 is formed, and the lower end of the terminal 3a of the rubber connector 3 fitted into the mounting hole 12a comes into contact with the terminal portion 1a of the printed circuit board 1. Although not specifically illustrated, in order to position the plate 12 with respect to the printed circuit board 1,
A positioning pin portion is formed on the plate 12, and a positioning hole into which the positioning pin portion is fitted is formed on the printed circuit board 1.

The plate 12 is formed with an upper frame portion 12b in which the surface light-emitting plate 5 is fitted and mounted, and the outer periphery of the liquid crystal display plate 14 is formed around four upper ends of the upper frame portion 12b. The LCD panel 1 projects inward to stop
Positioning portions 12c for positioning the light emitting portion 4 on the light emitting portion 5b of the surface light emitting plate 5 are formed.

On the side of the plate 12, a guide portion 1 for guiding a pair of lead wires 5a of the surface light-emitting plate 5 when inserting them into the through holes 1c of the printed circuit board 1 respectively.
2d is provided.

As shown in detail in FIG. 2, the guide portion 12d is provided with insertion holes 12e for inserting the respective lead wires 5a of the surface light emitting plate 5 from above, and each of the insertion holes 12e is Are set to match the through holes 1c of the printed circuit board 1, and
The insertion opening 12f of each insertion hole 12e is formed in a tapered shape with a wide upper side.

With the above configuration, in order to assemble the liquid crystal display device, as shown in FIGS.
The plate 12 is positioned and placed on the
The lower end of the terminal 3a of the rubber connector 3 fitted in the second mounting hole 12a is brought into contact with the terminal 1a of the printed circuit board 1, and the surface light emitting plate 5 is fitted in the upper frame 12b of the plate 12 while being bent. Attach.

The surface emitting plate 5 is connected to the upper frame 1 of the plate 12.
2b, a pair of lead wires 5
When a is inserted into the tapered insertion opening 12f of the guide portion 12d of the plate 12, each lead wire 5a is guided by the insertion hole 12e and automatically inserted into the through hole 1c of the printed circuit board 1. . Lead wire 5a inserted into this through hole 1c
Is connected to the printed circuit of the printed circuit board 1 at an appropriate time by soldering a (see FIG. 2B) or the like.

Then, as shown in FIG.
The liquid crystal panel 14 is positioned on the positioning portion 12c of the upper frame portion 12b.
When the liquid crystal display panel 14 is mounted in a state where it is fitted and positioned, the upper end of the terminal 3a of the rubber connector 3 comes into contact with the terminal portion of the liquid crystal display panel 14, and the liquid crystal display panel 14 prints on the printed circuit board 1 via the rubber connector 3. Connected to the circuit.

Thereafter, as shown in FIG.
Is externally fitted to the plate 12, and the hook 6a of the holder 6 is inserted into the hook hole 1b of the printed circuit board 1 and bent and locked.
4, the surface light-emitting plate 5 and the plate 12 are fixed to the printed circuit board 1.

As described above, when the surface light-emitting plate 5 is mounted on the plate 12 of the printed circuit board 1, the lead 5 a of the surface light-emitting plate 5 is simply inserted into the tapered insertion opening 12 f of the guide portion 12 d of the plate 12. Since the wire 5a is guided by the insertion hole 12e of the guide portion 12d and is automatically inserted into the through hole 1c of the printed circuit board 1, the operation of inserting the lead wire 5a of the surface emitting plate 5 into the through hole 1c of the printed circuit board 1 is performed. Can be done easily and quickly,
The assemblability of the surface light emitting plate 5 is improved.

The insertion hole 1 of the insertion hole 12e
Since 2f is tapered, the tip of the lead wire 5a is smoothly guided from the insertion port 12f to the through hole 1c through the insertion hole 12e. Further, the plate 12
Since the guide portion 12d can be provided integrally with the
It does not increase costs.

Further, since the positioning portion 12c of the liquid crystal display plate 14 is formed on the plate 12, the liquid crystal display plate 14 is stopped by the positioning portion 12c of the plate 12, and the light emission of the surface light emitting plate 5 is performed. Since the liquid crystal display panel 14 is positioned at the portion 5b, it is not necessary to form the liquid crystal display panel 14 into an outer shape including the seal portion 5c of the surface light emitting plate 5, and the outer shape of only the light emitting portion 5b can be obtained. Cost can be reduced.

In the above embodiment, the guide portion 12d is separately provided on the plate 12, but FIG.
As shown in (b), a guide portion 12d using a connection portion of a storage portion 12g of a display device such as a light emitting diode (LED) 7 provided on the plate 12 may be used.

In the above embodiment, the guide portion 12d
Hole 12 having a tapered insertion opening 12f
e, but as shown in FIGS. 7A and 7B and FIG. 8A, a rectangular through hole 12h is formed in the guide portion 12d, and the storage of the through hole 12h is performed. Part 12
On the inner wall on the g side, insertion grooves 12i for the respective lead wires 5a of the surface light-emitting plate 5 are provided.
i is set so as to coincide with each through hole 1c of the printed circuit board 1.

With this configuration, the lead wire 5a of the surface light emitting plate 5 is simply inserted into the insertion groove 12i of the guide portion 12d of the plate 12, and the lead wire 5a is guided by the insertion groove 12i and Automatically inserted into the through hole 1c. FIG.
As shown in (b), the groove bottom 12j of the insertion groove 12i.
Is formed into a curved surface, the leading end of the lead wire 5a is smoothly guided from the insertion groove 12i to the through hole 1c.

Note that, as shown in FIG.
Guide part 12d having 2h and insertion groove 12i
It is not necessary to use the connection portion of the storage unit 12g of the display device such as the light emitting diode 7, and even if the plate 12 is separately provided with the guide unit 12d as in the above embodiment, there is no problem. There is no.

[0034]

As is apparent from the above description, in the liquid crystal display device of the present invention, when the surface light emitting plate is mounted on the plate of the printed circuit board, the lead wire of the surface light emitting plate is guided by the guide portion provided on the plate. Since it is guided and automatically inserted into the through hole of the printed circuit board, the work of inserting the lead wires (terminals) of the surface light emitting plate into the through hole of the printed circuit board can be performed easily and quickly, and assembling of the surface light emitting plate Performance is improved. Further, since the guide portion can be provided integrally with the plate, the provision of the guide portion does not increase the cost.

According to a second aspect of the present invention, the insertion hole for the lead wire of the guide portion is made to coincide with the through hole of the printed circuit board, and the insertion hole is formed in a tapered shape. By simply inserting the lead wire into the tapered insertion hole, the lead wire is guided by the insertion hole of the guide portion and automatically inserted into the through hole of the printed circuit board. Further, since the insertion hole of the insertion hole is tapered, the tip of the lead wire can be smoothly guided from the insertion hole to the through hole through the insertion hole.

According to a third aspect of the present invention, when the groove for inserting the lead wire of the guide portion is made to coincide with the through hole of the printed circuit board and the groove bottom of the groove for insertion is formed in a curved surface, the lead wire of the surface light emitting plate is formed. Just by inserting the lead wire into the insertion groove of the guide portion of the plate, the lead wire is guided by the insertion groove of the guide portion and automatically inserted into the through hole of the printed circuit board. Further, since the groove bottom of the insertion groove has a curved surface, the leading end of the lead wire can be smoothly guided from the insertion groove to the through hole.

When a positioning portion for positioning the liquid crystal display panel on the light emitting portion of the surface light emitting plate is formed on the plate, the liquid crystal display plate is positioned on the light emitting portion of the surface light emitting plate by the positioning portion. In addition, since the liquid crystal display panel can be formed to have an outer shape including only the light emitting portion of the surface light emitting plate, the size of the liquid crystal display panel can be reduced and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a liquid crystal display device of the present invention.

FIG. 2 shows a relationship between a lead wire of a surface light emitting plate and an insertion hole of a guide portion, (a) is a front view before insertion,
(B) is a front view after insertion.

FIG. 3 is a printed circuit board, (a) is a plan view,
(B) is a side view.

FIGS. 4A and 4B show a state in which a surface light emitting plate is fitted inside a plate placed on a printed circuit board, wherein FIG. 4A is a plan view and FIG. 4B is a side view.

FIGS. 5A and 5B show a state in which a liquid crystal display panel is positioned by a positioning portion of a plate placed on a printed circuit board, wherein FIG. 5A is a plan view and FIG. 5B is a side view.

6A and 6B show a state in which a plate or the like is fixed by a holder, wherein FIG. 6A is a plan view and FIG. 6B is a side view.

FIG. 7 shows a guide section and a storage section according to a first modification;
(A) is a perspective view, (b) is a plan view, and (c) is a plan view of a guide portion of a second modification.

8A is a cross-sectional view of a straight insertion groove, and FIG. 8B is a cross-sectional view of a curved insertion groove.

FIG. 9 is an exploded perspective view of a conventional liquid crystal display device.

10A and 10B show a state in which a plate and the like are fixed by a holder, wherein FIG. 10A is a plan view and FIG. 10B is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed circuit board 1c Through hole 3 Rubber connector 5 Surface light emitting plate 5a Lead wire 5b Light emitting part 6 Holder 12 Plate 12c Positioning part 12d Guide part 12e Insertion hole 12f Insertion port 12i Insertion groove 12j Groove bottom 14 Liquid crystal display plate

Claims (4)

[Claims] 1. A liquid crystal display device in which a liquid crystal display panel and a surface light emitting plate are mounted on a plate mounted on a printed circuit board, and lead wires of the surface light emitting plate are inserted into through holes of the printed circuit board to connect to a printed circuit. 2. The liquid crystal display device according to claim 1, wherein a guide portion for guiding a lead wire of the surface light emitting plate into a through hole of the printed circuit board is provided on the plate. 2. The guide portion has a hole for inserting a lead wire of a surface light-emitting plate. The hole for insertion coincides with a through hole of a printed circuit board. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is formed in a tapered shape. 3. The guide portion is provided with a groove for inserting a lead wire of the surface light emitting plate, the insertion groove corresponds to a through hole of a printed circuit board, and a groove bottom of the insertion groove is formed. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is formed in a curved shape. 4. A positioning portion for positioning the liquid crystal display panel on the light emitting portion of the surface light emitting plate by holding the outer periphery of the liquid crystal display plate against the outer periphery of the plate.
The liquid crystal display device according to any one of the above.