JPS6091386A - Filter mounting unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a device for attaching an anti-glare filter in front of a CRT in an electronic device such as a character display device including a CRT.

[Background of the invention]

In electronic devices equipped with CRTs such as character display devices,
It is often necessary to take measures to prevent glare on the screen from external light. Conventional character display devices and the like either have a hood attached to the cabinet body (escutcheon) to prevent glare, or because the amount of protrusion of the hood is naturally limited, sufficient anti-glare effects cannot be achieved.

In order to expect higher anti-glare effects, it is desirable to install an anti-glare filter in front of the CRT.

However, the structure in which the filter is sandwiched between the CRT and the cabinet body has many disadvantages.

For example, the part of the cabinet that holds the filter needs to match the curvature of the CR1 screen, or the curvature of the screen differs depending on the type of CRT, such as monochrome or color, even if the screen size is the same. Each type must be prepared separately.

However, the cabinet body is generally made of plastic, and extremely expensive molds are used to mold it.
It is extremely uneconomical to prepare cabinet bodies for each type of RT.

Furthermore, in order to clean the inner surface of the filter, the cabinet body must be removed, making maintenance extremely difficult.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a filter removing device that can solve the above problems.

[Summary of the invention]

The present invention does not attach an anti-glare filter directly to the cabinet body of an electronic device, but instead attaches a front frame to the cabinet body and attaches the filter to the front frame.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 5.

FIG. 1 is an exploded perspective view of the filter mounting device, FIG. 2 is a sectional view of the filter mounting device, and FIG. 3 is an enlarged sectional view of a part of the filter mounting device.

In these figures, 1 is a front frame, and 2 is a cabinet body (escutcheon) of an electronic device.

A guide piece 4 is formed on the outer wall 3 on the short side of the front frame 1, and an outward claw 6 is provided on the outer wall 5 on the long side. A flange 9 matching the curvature of the screen of the CRT 8 is formed at the tip of the inner wall 7 of the front frame 1, and an inwardly directed claw 10 is provided at a position spaced apart from the flange 9 by a certain distance.

Reference numeral 11 denotes a filter, which is engaged and held between the flange 9 and the claw 10 by being pushed into the opening 12 of the front frame 1 from the front side (upper side in the figure). In other words, flange 9
The claws 10 and the inner wall 7 constitute means for holding the filter 11 on the front frame 1.

The cabinet screw 1 and main body 2 have a frame portion 13 that projects forward. A kite hole 15 is formed at the base of the outer wall 14 on the shorter side of the frame 13, and a mounting hole 17 is formed at the base of the outer wall 16 on the longer side.

If you press the front frame 1 from the front side of the cabinet body 2 while aligning the pieces 4 and holes 15 as guides,
The claw 6 enters the inside of the hole 17, and as a result, as shown in FIG.
As shown, the front frame 1 is locked and held by the cabinet body 2. The filter 11 is fixed at a constant distance in front of the screen of the CRT E'.

As is clear from the explanation so far and Figure 2, CRT8
When the type of CRT 8 changes and its screen curvature changes, it is necessary to use a front frame 1 whose flange 9 matches the screen curvature of the CRT 8, but the same cabinet body 2 can suffice. In this way, instead of preparing several types of cabinet bodies 2 that require expensive molds, we prepare several types of front frames 1 that can be molded with relatively inexpensive molds depending on the type of CRT. By doing so, it is possible to support many types of CRTs with different screen curvatures.

Furthermore, when the front frame l is attached to the cabinet body 2, as shown in FIG. The dimensions of the hole 17 etc. are determined so that the hole 17 and the like occur. Therefore, if the outer wall 5 of the front frame 1 is pushed inward, the claws 6 will come out of the holes 17, so the front frame 1 can be removed from the cabinet body 2.
The inner surface of the filter 11 can be easily cleaned. in this way,
Since the filter 11 is attached to the front frame 1 which is separate from the cabinet body 2, maintainability can be improved by making the front frame 1 removable.

Now, in this embodiment, CR with the smallest screen curvature
When using T8, as shown in Fig. 4, the front frame l
The cabinet body 2 is configured such that the filter 11 can be directly attached to the cabinet body 2 without using a filter. That is, a flange 19 matching the minimum screen curvature is formed at the tip of the inner wall 18 of the frame portion 13, and a claw 20 is provided on the upper side of the flange 18. To attach the filter 11, the filter 11 is pushed into the opening 21 of the cabinet body from the front, and the filter 11 is held and held between the claws 20 and the flange 19.

In addition, in order to facilitate the operation of such installation and to enable the attached filter 11 to be removed from the front side of the cabinet body 2, slits 22 are provided on both sides of the claws 19, as shown in an enlarged view in FIG. The claws 20 are formed so that the claws 20 can be sufficiently bent inward and outward.

Although one embodiment of the present invention has been described above, the present invention is not limited to the configuration of the same embodiment, and various modifications are permitted. For example, if the filter attachment means is configured so that the filter can be easily attached to and detached from the front frame,
The front frame may not be removable from the cabinet body. Further, the front frame may be constructed from two or more parts. Further, the filter may be a flat plate that does not need to match the curvature of the CRT. Furthermore, the structure of the cabinet body can also be changed as appropriate.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, it is possible to use various CRTs with different screen curvatures by simply preparing inexpensive front frames for each type of CRT, without increasing the types of expensive cabinet bodies. The anti-glare filter can be attached to an electronic device that has been installed, and the inner surface of the filter can be cleaned without removing the cabinet body, improving maintainability.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a filter mounting device according to the present invention;
Fig. 2 is a sectional view of the device, Fig. 3 is an enlarged sectional view of a part of the device, Fig. 4 is a sectional view showing the filter attached without using a front frame, and Fig. 5 FIG. 2 is an enlarged perspective view of a part of the cabinet body. ■ Front frame, 2 ・Cabinet body, 6°10.20
Claw, 8- CRT, 9, 19...Flange, 11...
Filter, 1.5.17...hole. Fang 1 Illustration Fang 2 Illustration O 3 Illustration Ka 4 Illustration 5

Claims (1)

[Claims] (+,) A filter mounting device for mounting a filter in front of the CRT of an electronic device equipped with a CRT, the device comprising a cabinet body of the electronic device and a front frame, the front frame and the cabinet body being connected to the front frame. A filter mounting device characterized in that the filter mounting device has means for mounting and holding the filter on the cabinet body, and the front frame itself has means for holding the filter.