JP2504219Y2 - Liquid crystal display - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a liquid crystal display device with improved assembly.

[Prior art]

Liquid crystal display devices are used in various electronic devices. 3 and 4 show an example of a liquid crystal display device used in a cordless telephone handset. That is, FIG. 3 is a front view of a cordless telephone handset, FIG. 4 is a side view thereof, and 1 is a transmitter, 2 is a receiver, 3 is a dial key, 4 is various function keys, and 5 is a function key. A transmitting / receiving antenna, 6 is a printed wiring board, 7 is various circuits,
Reference numeral 8 is a rechargeable battery, and 9 is a liquid crystal display panel. The liquid crystal display panel 9 is a horizontally long rectangle, which allows the present state of the telephone and the contents of the key operation, such as the remaining amount of the built-in battery 8 and the telephone number of the other party who is dialing,
The date, time, and the distinction between external and internal calls are displayed. FIG. 2 is a vertical cross-sectional view showing the mounting portion of the liquid crystal display panel 9, and 11 is a housing of the child device, which is made of a plastic material. The liquid crystal display panel 9 is provided and fixed between the housing 11 and the printed wiring board 6. The casing 11 is provided with a rectangular window 12 which is slightly smaller than the liquid crystal display panel 9, and is integrally supported by the casing 11 by a frame-shaped projection for regulating the position of the liquid crystal display panel 9 in the vertical and horizontal directions. The part 13 is formed. The liquid crystal display panel 9 is housed in the support portion 13. A terminal portion is provided on one end side of the liquid crystal display panel 9 in the short side direction, and a conductive connector 14 is arranged between the terminal portion and the wiring board 6 in a direction along the longitudinal direction of the liquid crystal display panel 9. Has been done. In this case, the conductive connector 14 is made of conductive rubber having a plurality of conductive portions in the left-right direction in the drawing and has elasticity. The elastic force presses the liquid crystal display panel 9 against the back surface of the housing 11, and
The terminal portion of the liquid crystal display panel 9 and the printed wiring board 6 are electrically connected. A dummy connector 15 is provided between the other end of the liquid crystal display panel 9 facing the terminal portion and the printed wiring board 6 to keep the liquid crystal display panel 9 parallel to the printed wiring board 6. ing. The dummy connector 15 is also made of a rubber material, and its elastic force balances with the conductive connector 14 to press the liquid crystal display panel 9 against the back surface of the housing 11. The dummy connector 15 is a simple elastic member having no conductivity. In this way, the liquid crystal display panel 9 is fixed between the housing 11 and the printed wiring board 6. A window panel 17 made of a transparent material such as a plastic material is fixed to the window portion 12 of the housing 11 as a protective surface of the liquid crystal display panel 9 by adhesion or fitting.

[Problems to be solved by the device]

However, in the above-described conventional configuration, the dummy connector 15 is required to attach the liquid crystal display panel 9, which causes an increase in the number of parts, an increase in the number of assembling steps, and an increase in cost. Further, the window panel 17 includes the housing 11 and the printed wiring board 6.
After fixing the liquid crystal display panel 9 between the
As shown in Fig. 12, it is mounted by bonding or fitting from the front, which also invites an increase in assembly man-hours. The present invention seeks to eliminate these problems.

[Means for Solving the Problems]

A liquid crystal display device according to the present invention has a rectangular shape, a liquid crystal display panel having a terminal portion on at least one side, a wiring board disposed in a housing, a terminal portion of the liquid crystal display panel, and the wiring. An electrically conductive connector having elasticity for electrically connecting between the terminal portion and the wiring substrate, which is arranged between the substrate and the substrate, and is made of a transparent material and has a size that covers the display surface of the liquid crystal display panel. A protective surface, a leg portion formed from the protective surface toward the wiring board in accordance with the outer shape of the liquid crystal display panel, and at least one side other than the terminal portion of the liquid crystal display panel. A window panel having a locking portion formed so as to be held between the liquid crystal display panel and a surface of the liquid crystal display panel. When it comes to the outside through the The leg portion of the window panel is in contact with the wiring board, the window panel is fixed between the housing and the wiring substrate, and the liquid crystal display panel is displayed by the leg portion of the window panel. The position is regulated in the plane direction, and the conductive connector and the locking portion are fixed between the window panel and the wiring board.

[Action]

According to the above configuration, the conductive connector is arranged between the wiring board and the terminal portion of the liquid crystal display panel while the liquid crystal display panel is locked by the locking portion of the window panel, and the window panel is wired to the housing. By fixing the liquid crystal display panel to the board, the liquid crystal display panel is fixed to the window panel and the wiring board at the same time. Therefore, the dummy connector becomes unnecessary and the number of assembling steps can be reduced.

【Example】

An embodiment in which the liquid crystal display device according to the present invention is applied to a cordless telephone handset described above will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of the main part of this embodiment, which is a view corresponding to FIG. 2 of the prior art. In FIG. 1, the same parts as those in FIG. 2 are designated by the same reference numerals. In this example, the housing 11 is provided with the window 12 but is not provided with the support 13. Then, the window panel 20 is attached to the housing 11
And the printed wiring board 6, and the liquid crystal display panel 9 is fixed between the window panel 20 and the printed wiring board 6. That is, the window panel 20, which is made of, for example, a transparent plastic material, has a U-shaped cross section.
Then, the protection surface 21 of the liquid crystal display panel of the window panel 20 is formed in a horizontally long rectangular shape in correspondence with the shape of the window 12 of the housing 11, and around the surface of the protection surface 21 on the window 12 side, Step
22 are formed. Then, at the step portion 22,
By fitting the window panel 20 into the window 12 of the housing 11,
The window panel 20 is positioned with respect to the housing 11. In addition, the leg portion 2 extends from one end and the other end of the protective surface 21 of the window panel 20 in the short side direction toward the printed wiring board 6.
3,24 are integrally formed. In this case, the leg portions 23 and 24 are formed in the longitudinal direction of the protective surface 21, and the liquid crystal display panel 9 is housed between the leg portions 23 and 24,
By 24, it is configured to regulate the position in a direction parallel to the display surface of the liquid crystal display panel 9 and in the vertical direction in the drawing. Note that the position regulation in the direction perpendicular to the paper surface of the drawing can be performed by, for example, a support portion protruding from the housing 11.
Further, the legs are formed so as to surround the liquid crystal display panel according to the outer peripheral shape of the liquid crystal display panel 9,
You may make it position-regulate in all directions parallel to the display surface of. Then, on the surface of the one leg portion 23 on which the end portion on the opposite side of the terminal portion of the liquid crystal display panel 9 abuts, on the surface facing the other leg portion 24, a locking portion protruding in a direction parallel to the protective surface 21. 25 is formed integrally along the longitudinal direction of the protective surface 21. The distance between the locking portion 25 and the protective surface 21 is determined by the liquid crystal display panel 9
The thickness is selected to be approximately equal to. Therefore, when the end of the liquid crystal display panel 9 is inserted between the protective surface 21 and the locking portion 25, the end of the liquid crystal display panel 9 is held by both due to the elastic force of the locking portion 25. With such a configuration, the liquid crystal display device can be assembled as follows. First, in the case of this example, the upper side of the liquid crystal display panel 9 is obliquely inserted from below between the rear surface of the protective surface 21 of the window panel 20 and the locking portion 25, and then the terminal portion of the liquid crystal display panel 9. The lower part in which the liquid crystal display panel 9 is formed is brought into contact with the back surface of the protection surface 21, and the liquid crystal display panel 9 is connected to the window panel 20 as shown in the figure.
Is placed on the back side of. Alternatively, the liquid crystal display panel 9
Protective surface 21 of the window panel 20 from the direction of penetrating the paper surface of the figure,
The liquid crystal display panel 9 is inserted between the locking portion 25 and the locking portion 25, and as shown in the figure, the liquid crystal display panel 9 is arranged on the back side of the window panel 20. Next, the conductive connector 14 is arranged at the lower position where the terminal portion of the liquid crystal display panel 9 is formed. In this case, the length of the conductive connector 14 in the left-right direction in the drawing is such that the tip of the conductive connector 14 slightly protrudes from the tip of the leg portion 24. Then, the window panel 20 has the step portion 22 and
The window panel 20 is positioned with respect to the housing 11 by being fitted into the window 12, and the tip ends of the leg portions 23 and 24 of the window panel 20 are made to abut against the printed wiring board 6. 20 is fixed in the illustrated state between the housing 11 and the wiring board 6. At this time, at the same time, the liquid crystal display panel 9 has the legs 23 and 24.
The vertical position of the window panel 20 is regulated by the locking portion 25 and the conductive connector 12, and the position in the front-back direction is regulated by the locking portion 25 and the conductive connector 12. , Is fixed between the window panel 20 and the wiring board 6. The liquid crystal display panel 9 and the printed wiring board 6 are electrically connected by the conductive connector 12. With the above, assembly is completed. As described above, according to the present invention, since the liquid crystal display panel 9 can be handled as an integral part while being locked to the window panel 20, the number of assembling steps can be reduced. Also,
Since the liquid crystal display panel 9 is fixed by the locking portion 25 formed integrally with the window panel 20 instead of the dummy connector 15 of FIG. 2, the dummy connector 15 becomes unnecessary, reducing the number of parts and reducing the cost. Can be planned. In the above description, the leg portions are also provided on the left and right sides of the rear surface of the protective surface 21 of the window panel 20, and the engaging portions similar to the engaging portions 25 are provided on the surfaces of the pair of leg portions facing each other. The liquid crystal display panel 9 can be locked to the window panel 20 by fitting the liquid crystal display panel 9 into the locking portions provided on the left and right legs.

[Effect of device]

According to this invention, since the liquid crystal display panel is fixed by the locking portion formed integrally with the window panel instead of the conventional dummy connector, the dummy connector becomes unnecessary,
It is possible to reduce the number of parts and cost. Further, by fixing the window panel between the housing and the wiring board while the liquid crystal display panel is locked to the window panel, the liquid crystal display panel can be fixed between the window panel and the wiring board. Therefore, the number of assembling steps can be reduced and the cost can be reduced also from this point. Further, since the liquid crystal display panel, which is a glass substrate, can be safely held by the window panel, there is an effect that the assembling becomes easy. Moreover, since the locking portion is formed so as to hold almost the entire area from one end side to the other end side of the holding target of the liquid crystal display panel, the protection surface and the locking portion of the side of the liquid crystal display panel are held. The holding by means of is surely performed.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an essential part of an embodiment of the present invention, FIG. 2 is a vertical sectional view of an essential part of a conventional example, and FIG. 3 is a front view of an example of an apparatus to which the present invention can be applied. The figure is a side view of the device of FIG. 6; Printed wiring board 9; Liquid crystal display panel 11; Housing 12; Window portion 14; Conductive connector 15; Dummy connectors 17, 20; Window panel 21; Protective surface 22; Step portions 23, 24; Leg portion 25; Locking Department

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Yoshiaki Kobayashi, 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (56) References: 59-176083 (JP, U) 1-85776 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. A liquid crystal display panel having a rectangular shape and having a terminal portion on at least one side, a wiring board arranged in a housing, a terminal portion of the liquid crystal display panel and the wiring board. An elastic conductive connector for electrical connection between the terminal portion and the wiring board, and a protective surface made of a transparent material and having a size covering the display surface of the liquid crystal display panel. A leg portion formed from the protective surface toward the wiring board in accordance with the outer shape of the liquid crystal display panel, and at least one side other than the terminal portion of the liquid crystal display panel having one end portion thereof. To the other end, and a window panel provided with a locking portion formed so as to hold between the protective surface and substantially the entire area from the window portion punched in the housing. The display surface of the liquid crystal display panel is a protective surface of the window panel. And a leg portion of the window panel is brought into contact with the wiring board so that the window panel is fixed between the housing and the wiring board, and the liquid crystal display panel is A liquid crystal display device in which the leg portion of the window panel is positionally regulated in the display surface direction and the window panel and the wiring board are fixed by the conductive connector and the locking portion. .