JP3844802B2 - Touch switch type LCD panel mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mounting structure for a touch switch panel and a liquid crystal display panel in a portable device.
[0002]
[Prior art]
A portable terminal device such as a handy terminal capable of inputting data is used for inventory management of products in stores and warehouses.
[0003]
The portable terminal device has a key input unit, a display unit, a memory, etc., stores the input data in the memory, and stores the data in the memory using a communication line after the data input is completed. Data can be transferred to the computer.
[0004]
The mobile terminal device has stricter usage conditions than equipment installed in offices, etc., for example, the terminal device may be dropped or water droplets may be applied to the terminal device, so a certain degree of impact resistance, A drip-proof property is required.
[0005]
Therefore, conventionally, as shown in FIG. 3, a holder 6 for integrally attaching the touch panel 3 and the printed circuit board 2 on which the liquid crystal panel 1 of the portable terminal device and the drive circuit for controlling the display of the liquid crystal panel 1 are mounted is provided. The holder 6 was fixed inside the device.
[0006]
Furthermore, in the above-described conventional portable terminal device, in order to provide a drip-proof property, a double-sided tape is applied between the holder 6 and the touch panel 3 or between the holder 6 and the case of the terminal device to allow water droplets to enter from the outside. I was trying not to.
[0007]
[Problems to be solved by the invention]
However, if the touch panel 3 and the liquid crystal panel 1 are integrated and fixed to the holder 6 as described above, both parts need to be replaced even if one of the touch panel 3 and the liquid crystal panel 1 breaks down. There was a problem of becoming higher.
[0008]
An object of the present invention is to realize a touch switch type liquid crystal panel mounting structure capable of reducing the repair cost of a product.
[0009]
[Means for Solving the Problems]
The touch switch type liquid crystal panel mounting structure of the portable device according to the present invention includes a case, a first elastic member for holding the touch switch panel, the liquid crystal panel and the printed circuit board having a U-shaped cross section. A second elastic member that sandwiches and holds the upper surface portion of the liquid crystal panel and the lower surface portion of the printed circuit board, and is attached to the case by screws or the like, and the first elastic member is formed by multiple molding. Molded integrally with the case of the portable device, the contact surface of the first elastic member and the touch switch panel is adhered with an adhesive member to provide drip-proof property, and separately from the second elastic member, Fixed to the case side.
[0010]
According to the present invention, since the touch switch panel and the liquid crystal panel are held by separate holding members, it is not necessary to replace up to the other part when one part breaks down, thereby saving repair costs. . Furthermore, the first elastic member is integrally molded with the case of the portable device so that the assembly of the device is simplified and the waterproof property between the elastic member holding the touch panel and the device case is improved. Can do.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic cross-sectional view of a portable terminal device, such as a handheld terminal, according to an embodiment of the present invention.
[0012]
As shown in FIG. 1, an elastic member 4 made of a rubber frame or the like is provided inside the portable terminal device to integrally hold a liquid crystal display panel (LCD) 1 and a printed circuit board 2 on which the drive circuit is mounted. Yes. Although not shown in FIG. 1, the elastic member 4 is attached to the case 6 by screwing or the like. The elastic member 5 that holds the touch panel 3 is made of a plastic with an elastic member such as an elastomer, and is integrally formed with the case 6 of the portable terminal device by double molding.
[0013]
A portion where the touch panel 3 and the elastic member 5 are in contact (portion a in the figure) is bonded with a double-sided tape or the like, so that water droplets and the like do not enter the gap between the touch panel 3 and the elastic member 5. .
[0014]
Here, a case where a failure occurs in the input unit and the touch panel 3 or the LCD 1 is replaced will be described.
In this embodiment, since the touch panel 3 is held separately by the elastic member 5 and the LCD 1 is held separately by the elastic member 4, for example, when the touch panel 3 is out of order, only the touch panel 3 is removed from the holding portion of the elastic member 5. It can be removed and replaced with a new touch panel 3. When the LCD 1 is out of order, only the LCD 1 can be removed from the holding portion of the elastic member 4 and replaced with a new LCD 1.
[0015]
When a failure occurs, conventionally, both the touch panel 3 and the LCD 1 had to be replaced. However, according to the mounting structure of the present embodiment, the broken part in the touch panel 3 and the LCD 1. Since only the replacement can be performed, the repair cost can be reduced.
[0016]
Furthermore, since the elastic member 5 that holds the touch panel 3 is formed integrally with the case 6 of the device by double molding, the waterproof work between the elastic member 5 and the case 6 becomes unnecessary. About the clearance gap between the touch panel 3 and the elastic member 5, it can prevent that a water drop penetrate | invades by sticking a tape etc. between both like the past. As a result, the work for securing the drip-proof property is also easier than before.
[0017]
Next, the procedure for molding the elastic member 5 integrally with the case by double molding will be described with reference to FIG.
The case 6 of the mobile terminal device has a structure that is divided into two parts, an upper case (hereinafter referred to as an upper case) 6a, a lower case (hereinafter referred to as a lower case) 6b, and an elastic member 5. It is integrally molded.
[0018]
First, the case where the upper case 6a is molded will be described. The mold of the upper case 6a is composed of two molds, a core (movable) side and a cab (fixed) side. In FIG. 2, assuming that the inner side of the upper case 6a is the core side and the front side is the cab side, and a gate is provided on the cab side, a plastic molding material is first injected from the gate and the upper case 6a is Molded.
[0019]
Next, a part of the core-side mold is exchanged to provide a desired clearance between the inner side of the upper case 6a and the core-side mold. When an elastic plastic molding material (for example, a thermoplastic elastomer) is injected from the gate in this state, the elastic plastic molding material flows into the upper side or the inner side of the upper case 6a, and the elastic member 5 is formed.
[0020]
The same applies to the molding of the lower case 6b. When the upper side of the mold of the lower case 6b in FIG. 2 is the core side and the lower side is the cavity side, first, plastic material is injected from the gate, and the lower case 6b It is formed. Next, a part of the core-side mold moves upward in FIG. 2 to ensure a predetermined clearance between the core-side mold and the molded product. Further, the mold on the cab side is replaced with another mold, that is, another mold for forming an elastic member for holding other components at a desired position inside the lower case 6b.
[0021]
In the embodiment described above, the elastic member 5 that holds the touch panel 3 is formed integrally with the case by double molding in order to ensure waterproofness, but the elastic member 4 that holds the liquid crystal panel 1 is double molded with the case 6. Alternatively, the elastic member 5 that holds the touch panel 3 may be separately provided, and the touch panel 3 and the liquid crystal panel 1 may be removed separately.
[0022]
【The invention's effect】
In the present invention, since the touch switch panel and the liquid crystal panel are separately held, it is possible to eliminate waste such as replacing both parts even when only one of them is out of order. Can be reduced. Furthermore, since the first elastic member is integrally formed with the case of the portable device by multiple molding, a waterproof operation between the first elastic member and the case becomes unnecessary, so that the drip-proof property of the device is ensured. The work for becomes easier.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view of a mobile terminal device according to an embodiment.
FIG. 2 is an internal structure diagram of the mobile terminal device.
FIG. 3 is an explanatory view of a conventional mounting structure.
[Explanation of symbols]
1 Liquid crystal panel 3 Touch panel 4 Elastic member

Claims (1)

In a portable device having a touch switch panel and a liquid crystal panel ,
Case and
A first elastic member for holding the touch switch panel;
A second elastic member that holds the liquid crystal panel and the printed circuit board in a U-shaped cross-section by sandwiching the upper surface portion of the liquid crystal panel and the lower surface portion of the printed circuit board, and is attached to the case with screws or the like And
Said first elastic member is molded to the case integral with the portable device by multiple molding, to have a drip of the contact surface of the first elastic member and the touch switch panel by bonding with the adhesive member The touch switch type liquid crystal panel mounting structure is fixed to the case side separately from the second elastic member .

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