JPS58172077A - Hood device - Google Patents

Abstract

PURPOSE:To prevent the contrast of a screen from decreasing at outdoors and irregular reflection of light on the surface of a magnifying lens and to facilitate the attachment of a hood body to video equipment, by providing a front filter of louver structure in front of the magnifying lens. CONSTITUTION:A hood body case 14 and a lens retainer front frame 15 are fixed by, for example, ultrasonic adhering work and in this case, the magnifying lens 16 is also fixed between the both. The front filter 17 is adhered by fitting unshown projection parts united with the filter 17 in two lateral holes 18 made in the left and right wall of the front frame 15 in the center. At this time, the filter 17 is fitted in front of the magnifying lens 16. The hood body case 14 is provided with fitting pieces 19 and 20 so that they face the rear from the ceiling and bottom surfaces in prallel in one body and bent parts 21 and 22 are provided inwardly from their tips at right angles in one body to form nearly L-shaped constitution. Consequently, the contrast of the screen is prevented from decreasing outdoors and the irregular reflection of light on the surface of magnifying lens is also prevented to facilitate the attachment to video equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to a hood device installed in front of a cathode ray tube in a small television receiver.

Recently, a television receiver using a 1.6-inch cathode ray tube has been developed mainly for outdoor use. When using the cathode ray tube outdoors, it is desirable to attach a hood in front of the cathode ray tube to avoid the effects of external light. Further, in this case, since the cathode ray tube is small, it is desirable to use a lens to enlarge the image.

In view of the above points, an object of the present invention is to provide a hood device whose hood body can be easily attached to video equipment such as a television receiver, and which can be used indoors without any problems. shall be.

Conventionally, in the case of a hood device for such a small-sized television receiver, a magnifying lens is provided in consideration of the small screen size, and a hood that also has a screen magnification function is used. Although the screen is enlarged to make it easier to see, since the magnifying lens uses a convex lens, the diffused reflection of light on the spherical surface of the lens becomes distracting, and the original effect of shielding against external light is not sufficient, making the screen The contrast of the image was greatly reduced, making it difficult to see.

The present invention eliminates the above-mentioned drawbacks, and not only enlarges the screen, but also reduces the difficulty in viewing due to a decrease in the contrast of the screen outdoors and the difficulty in viewing due to diffused reflection of light on the surface of the magnifying lens, thereby improving the effectiveness of the hood function. In addition, the hood main body is not attached to the video equipment body in any direction, so that the attachment direction can be selected depending on the environmental conditions of use.

One embodiment will be described below with reference to the accompanying drawings.

FIG. 1 shows a television receiver body to which a hood body is attached. This television receiver has 1.
It uses a 6-inch cathode ray tube and incorporates a radio receiver, and in the figure, 1 is the cathode ray tube, 2 is a TV channel selection knob, 3 is a TV dial indicator,
4 is a headphone/earphone terminal, 5 is a foldable stand, 6 is a TV-radio-0FF-charging switch, 7 is a volume adjustment knob, 8 is a radio channel selection knob, 9 is a contrast adjustment knob, 10 is a brightness Adjustment knob, 11
1 is an external power supply terminal, and 12 is a Rondo antenna. Further, FIG. 2 shows a state in which the hood body 13 is attached to the television receiver body.

FIG. 3 shows the structure of the hood body.

Here, 14 is a hood body case, 16 is a lens holder front frame, 16 is a convex lens for magnification, and 17 is a front filter having a louver structure. The hood main body case 14 and the lens holder front frame 16 are fixed together by, for example, ultrasonic bonding, and at this time, the magnifying lens 16 is also fixed so as to be sandwiched between them.

The front filter 17 is attached by fitting protrusions (not shown) integral with the filter 17 into horizontal holes 18 provided one each in the center of the left and right walls of the lens holder front frame 16. Here, the front filter 17 is enlarged and installed so as to be located in front of the lens 16.

In order to attach this hood main body 13 to the television receiver main body shown in FIG. 1, as shown in detail in FIG. Mounting pieces 19 and 20 are integrally provided,
Further, a bent portion 21.22 is integrally provided at a right angle inward from the tip of the mounting piece 19°2o to form an oval shape, and the bent portion 21.22 has a depth t. and the radius R
One approximately semicircular recess 23 of o is provided at a position ll symmetrical to the left and right from the center of the hood main body, and further, from this recess 23 toward the end, a position of dimension P1 is formed into a bent portion 21, 22. This is the end wall of the This mounting piece 19.
20 has elasticity, as shown in FIG. 5, and bends in the direction of the arrow and in the opposite direction.

On the other hand, as shown in FIG. 6, the television receiver body 24 is provided with a fitting groove 26 all around the front frame. 1 is a bent portion 21.2 at the interval between the upper and lower sides of this fitting groove 25.
The interval K between 2. and the fitting groove 26
The lower side of the cathode ray tube 1 has a height T1. which fits into the recess 23 of the hood body 13 at a dimension lθ from the center of the screen of the cathode ray tube 1. A substantially semicircular convex portion 26 with a radius R1 is integrally provided, and
This convex portion 26 is a geo method P. A rectangular protrusion 27 is integrally provided at the position. Note that R, “RQ * tI ”'
tO+ l+ ==go*Pl−P. It is.

Arrow A with respect to the television receiver body 24 having the above configuration.
From the direction, insert the bent portion 21° 22 of the hood body 13 into the fitting groove 2.
5, the convex portion 26 fits into the concave portion 23, and the end wall of the bent portion 21 or 22 collides with the convex portion 27 that serves as a stopper, and the hood body 13 is placed in the optimum position for the cathode ray tube screen. held in position.

Here, the projections 26 of the television receiver main body 2401
On the other hand, the hood body 13 is provided with four parts 23 symmetrically on the top and bottom, so although it is installed from the direction indicated by the arrow, it is possible to eliminate the directionality in the vertical direction of the hood body 13, and which Even if it is turned upward, it can be attached to the television receiver body 24. When the hood main body 13 is to be removed, the attachment pieces 19 and 20 are elastically deformed and can be removed by applying force in the direction opposite to the direction of the arrow. Further, here, the front filter 17 having a louver structure has a louver angle of θL as shown in FIG. Therefore, if the hood main body 13 is attached upside down to the television receiver main body 24, the louver angle θL will have an angle in the opposite direction, and as shown in FIG. Hood body 1 from diagonally above
3, if the hood main body 13 is installed so that the louver angle θL is in the opposite direction to that shown in FIG. This makes it possible to prevent a decrease in contrast, and also to reduce diffused reflection caused by the magnifying lens 16, making the screen easier to see.

In addition, it can be viewed indoors in a similar manner, and if the hood main body 13 is installed upside down as shown in FIG. 7a, it can also be viewed diagonally from above. This condition is desirable and effective indoors, where there is no outside light and where viewing is often done in front or slightly above the front. As described above, this configuration allows the mounting state of the hood body 13 to be effectively selected depending on the environmental conditions, which is extremely convenient in practice.

As explained above, according to the present invention, the screen can be enlarged and viewed by using the magnifying lens, and by installing a front filter with a louver structure in front of the magnifying lens, the screen can be viewed outdoors. This prevents a decrease in contrast and diffused reflection of light on the surface of the magnifying lens, making the screen easier to see.

Furthermore, by eliminating the orientation of the hood body to the video equipment, the hood can be mounted by selecting the most effective mounting direction depending on the usage environment conditions.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of a television receiver that can use the 7- to 7-D device of the present invention, FIG. 2 is a perspective view of the television receiver with the hood body attached, and FIG. 3 is a perspective view of the television receiver according to the present invention. - Cross-sectional view of the hood main body used in the hood device in the example, FIGS. 4a and 4b. C is a side view, rear view, main part front view, and 6th
The figure is a side W1 diagram explaining the functions of the hood body, and Figures 6a, b, and c are front views showing the configuration of the video equipment body side.
Side view, main part front view, Figure 7a. b is a diagram for explaining the function and effect of the device of the present invention. 1...Cathode ray tube, 13...Hood body, 14...Hood body case, 16...
・Lens holder front frame, 16... Magnifying lens, 1
7...Front filter, 19.20-...
・Mounting piece, 21.22...°...Bending part, 23...
...Recess, 24...Video equipment body, 26...
...Fitting groove, 26.27...Protrusion.

Claims (1)

[Claims] A magnifying lens and a front filter having a louver structure are respectively attached to the hood body so as to be located in front of the magnifying lens, and mounting legs having an abbreviated shape are integrally provided above and below the rear end of the hood body, A hood device that allows the hood body to be attached to the video equipment body by forming a groove on the outer periphery of the leading end of the video equipment body over the entire circumference into which the pair of mounting legs of the hood body fit.