JPS63241521A - Method for mounting protective plate for liquid crystal display surface - Google Patents

Abstract

PURPOSE:To permit easy attachment and detachment of a protective late and sure fixing thereof by once curving the protective plate, fitting the plate into a recess and supporting the plate in detaining holes at both ends and the central part of the plate part, thereby stably holding the protective plate to the liquid crystal display surface of a housing. CONSTITUTION:To amount the protective plate 12 into the recess 16 of the device housing 13, an operator inserts one end of a projecting part 12a into the detaining hole 17 of the device housing and pushes the central part upward to warp the downward projecting protective plate to an upward projecting state while holding the end on the side opposite from the inserted end. The remaining part of the projection 12 is inserted into the detaining hole 17 on the housing side when the projection 12a at the opposite side end is inserted into the recess and the central part lifted by the operator is released in this state. The protective plate 12 has the downward projecting shape in a free state and, therefore, the force is acted on the protective plate in the detained state by a frame-shaped plane 15 and the detaining hole 17 in the direction where the downward projecting warpage is returned. The display surface is thus built without clattering and lifting. The protective plate is easily removable by hooking the fingertip in a central notch 18 or lifting the same by a puller.

Description

DETAILED DESCRIPTION OF THE INVENTION (Objective of the Invention) (Industrial Application Field) The present invention relates to a method for attaching a protective plate to the display surface of a liquid crystal display device used as a display unit of a portable word processor or the like.

(Prior Art) Recently, liquid crystal display devices (LCDs) have been widely used as display units in portable word processors and the like. This LCD
has a structure in which the liquid crystal is sandwiched between two sheets of glass, so when used in a device, the display side is covered with a protective transparent plastic plate. FIGS. 4 and 5 show cross sections of conventional related parts. FIG. 4 shows a method of attaching the plastic protection plate (2) to the device housing (2) from the inside by adhesive bonding or high-frequency welding, where (2) is the adhesive surface, and (6) is the LCD. Figure 5 shows the plastic protective plate (2
Insert it into the hole in A) and heat the tip to weld and fix it.
This is a method to In all of the above cases, a plastic protection plate is attached from the inside of the casing, and once attached, it is difficult to remove. In addition, the plastic protection plate needs to be free from scratches and dirt so that the display does not become difficult to see, and during manufacturing, sales, and maintenance, scratches and dirt on the plastic protection plate require replacement and cleaning. However, with the above-mentioned conventional installation method, not only the plastic protection plate but also the casing side must be replaced. In addition, when cleaning, there were drawbacks such as the need to disassemble the housing in order to wipe the inner surface of the plastic protective plate.

(Problems to be Solved by the Invention) As described above, the present invention eliminates the disadvantages that the protection plate cannot be replaced without the casing or that the casing must be dismantled for cleaning, and it is easy to attach and remove. It is an object of the present invention to provide a method for attaching a display screen protection plate that can be securely fixed.

[Structure of the invention]

(Means for Solving the Problems) The protection plate related to the present invention has locking protrusions at both longitudinal ends thereof, and is flexible so that both ends have an internal force to curve outward. This protective plate is installed in a recessed part of the housing for embedding the protective plate, whose bottom is the display window and the frame-shaped flat part around it, and the above-mentioned locking protrusions are engaged with the longitudinal end walls of the housing. A locking hole is provided.

(Function) When installing the protection plate, first bend the protection plate in the opposite direction to shorten the overall length by the amount of the locking protrusion, and then release it after it hits the locking hole in the burial recess to reduce the total length. A central portion of the protection plate that is restored to allow the locking projection to be inserted into the locking hole of the embedding recess and restore the internal force of the protection plate to press the locking portion and the frame-shaped plane formed by the locking projection and the locking hole. As a result, the protection plate is stably fixed in the buried recess due to stress when it is in a flat state. Incidentally, the protective plate can be easily removed by hooking one's finger on a notch provided at the central edge of the protective plate or by using a hook.

(Embodiment) FIG. 1 is an exploded perspective view showing details of a portion of a liquid crystal display (LCD) to which an embodiment of the present invention is applied.
2 shows the AA cross section in FIG. 1, and FIG. 3 shows the BB cross section in FIG. 1. In Figures to Figures 3,
■ is a liquid crystal display (LCD), (11a) is an LCD (
7) Display surface, (g is a plastic display surface protection plate that protects the display surface, (12a) is the engagement protrusion provided on the protection plate, 0 is the device casing to which the holding plate is attached, (to) 0Φ is the display window that penetrates the equipment housing, 0Φ is the frame-shaped flat part provided around the display window to flatten the protective plate 0, which is warped when used alone, and 0Φ is the flat part with the bottom surface. A recess formed as a recess into which the protection plate 0 is fitted; Body 0 ■
This is a notch used when removing it from the

Next, the present invention will be explained in detail. First, the device housing 0@ has a display window (to) that is provided to match the display surface (lla) of the liquid crystal display device ■, and the area around it forms a recess into which the protective plate (to) fits. . The display window (to), which is the bottom surface of this recessed portion, and its surroundings are a frame-shaped flat portion (to). Further, both longitudinal ends of the recess are provided with locking holes (2) into which projections (12a) at both longitudinal ends of the protection plate (to) are inserted. On the other hand, in the unassembled state, the mark-retaining plate is the first
As shown in the figure, the center part is curved so that it is convex toward the device housing (lower side in the figure). Further, the thickness of the protective plate is formed to be slightly thicker than the depth of the recessed portion on the side of the casing.

To attach the protection plate 02) to the recess 0Φ of the device housing 0■, first insert one of the protrusions (t2a) into the locking hole (b) of the device housing, and while holding down the opposite end, press the center part. Lift it upward and bend the protective plate, which was convex downward, to convex upward. Then, when the protrusion (12a) at the opposite end is inserted into the recess and the lifted center part is released, the remaining part of the protrusion (12a) is inserted into the locking hole (b) on the housing side. Since the protective plate 0 has a downwardly convex shape in the free state, in the locked state, the downward convex warp is returned to the protective plate due to the frame-like plane 0Φ and the locking hole (b). Force is applied in the same direction, allowing assembly without rattling or lifting. Removal is through the center notch (to)
This can be done easily by hooking your fingertips on the handle or lifting it with a hook.

The above has described a plastic protective plate for protecting the display surface of a liquid crystal display (LCD), but the display device is an LCD.
The present invention is not limited to this, and can be similarly utilized for plasma display devices and LED-Ds. It can also be used to hold down replaceable display nameplates.

〔Effect of the invention〕

The present invention is as described above, i) Since no adhesion or welding is performed, equipment, materials, and time for this can be saved. 11) Installation and removal are extremely easy and productivity is high. 111) When replacing the protection plate, there is no need to disassemble the device casing or replace the casing, which improves manufacturing yield and reduces the cost of maintenance parts. iv) Since it is easy to install and remove, cleaning the inside of the protective plate is also easy. Effects such as this can be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a portion of a device to which an embodiment of the present invention is applied, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a sectional view taken along line BB in FIG. 4 and 5 are sectional views showing a conventional example in comparison with FIG. 3. 11a: LCD display surface, 12: Protective plate, 12a: Engagement protrusion, 13: Housing, 14: Display window, 15: Frame-shaped flat part, 16: Recessed part, 17: Locking hole.

Claims (1)

[Claims] a flexible and transparent protection plate which is curved so that its longitudinal center portion is convex toward the display surface side and has an engaging protrusion on the end surface of the curved end;
a display window provided in the housing through which a liquid crystal display surface can be seen;
a recess provided including the display window and its surrounding area and into which the protection plate is embedded; a frame-shaped flat part formed around the display window as a bottom surface of the recess; and a longitudinal side wall of the recess. a locking hole provided on the direction wall surface into which the engaging protrusion is inserted; the protective plate is once curved in the opposite direction and fitted into the recess, and the locking hole at both ends and the center part of the flat part are connected to each other; A method for attaching a liquid crystal display surface protection plate, characterized in that the protection plate is supported stably on the liquid crystal display surface of a housing.