JPH0350603Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a cathode ray tube device used in a projection television receiver.

[Conventional technology]

Conventional projection television receivers are generally configured to image images reproduced by a cathode ray tube on a screen using an optical lens. It has the disadvantage that light is refracted and reflected by the surface, reducing the contrast of the image.

For this reason, as shown in Japanese Utility Model Application Publication No. 55-3536, it has been considered to install an optical medium such as silicon gel having a refractive index equivalent to that of glass material between the cathode ray tube and the optical lens.

Figure 4 shows an example of this.
1 is a projection type cathode ray tube, 2 is a lens unit consisting of a plurality of lenses that projects the reproduced image onto the cathode ray tube 1, and 3 is an optical medium such as silicon gel installed between the cathode ray tube 1 and the lens unit 2. , 4 are arranged between the cathode ray tube 1 and the lens unit 2,
It is a sealing material that prevents silicone gel, etc. from leaking out, and is formed into a cylindrical shape. Reference numeral 5 denotes a holder that supports the cathode ray tube 1 and lens unit 2 at a predetermined interval and fixes these assemblies to a cabinet or the like.

[Problem that the invention attempts to solve]

In such a cathode ray tube device, it is difficult to accurately set the mounting position of the sealing material 4, which also poses a problem in workability. In addition, the silicon gel is heated and cooled depending on the operating state of the cathode ray tube 1, and repeats thermal expansion and contraction, so there is a risk that the sealing material 4 may move throughout, which is preferable in terms of reliability. It wasn't.

This idea was made in order to eliminate the above-mentioned drawbacks, and it provides a cathode ray tube device in which both ends of the sealing material are sandwiched between the spacer, the cathode ray tube, and the lens unit, and the sealing material is engaged with the spacer. This is what we provide.

[Means for solving problems]

The cathode ray tube device according to this invention is configured such that engaging portions that engage with the spacer are provided at both end flange portions of the sealing material, and both ends are pressed and held between the cathode ray tube and lens unit surfaces and the spacer. There is.

[Effect]

With this configuration, the sealing material can be brought into close contact with the surfaces of the cathode ray tube and lens unit, making it possible to securely fix the sealing material, and also ensuring that both ends of the sealing material are engaged with the spacer. Since the position can be determined by this method, the workability can be improved.

[Example of idea]

This invention will be described below with reference to FIG. 1, which is an example. In the figure, 6 is a spacer formed in a cylindrical shape, and a pair of annular protrusions 6 protrude inward.
a, 6b, and a plurality of recesses 6c are formed on the outer side surfaces of the projecting pieces 6a, 6b.
Reference numeral 7 denotes a sealing material made of an elastic material, and as shown in FIG. 2, it includes a cylindrical intermediate portion 7a, both side flange portions 7b, and a plurality of locking pieces 7c formed on the inner side surface of the flange portion 7b. and an injection port 7d communicating with the intermediate portion 7a. 8 is a bracket for fixing these assemblies to a cabinet or the like.

When assembling such a device, first, the flange portion 7b of the sealing material 7 is attached to the projecting piece 6a of the spacer 6,
6b, and the locking piece 7c of the sealing material 7 is fitted into the recess 6c of the spacer 6 as shown in FIG. At this time, the outer circumferential surface of the sealing material 7 is set to protrude slightly from the outer circumferential surface of the spacer 6. Next, the cathode ray tube 1 and the lens unit 2 are screwed and fixed to both sides of the spacer 6 together with the bracket 8. For this reason, the sealing material 7
The flange portion 7b is pressed between the cathode ray tube 1, the lens unit 2, and the projecting pieces 6a, 6b of the spacer 6, and comes into close contact with the surfaces of the cathode ray tube 1 and lens unit 2. Finally, the optical medium 3 is formed by injecting silicone gel or the like through the injection port 7d of the sealing material 7.

With this configuration, the sealing material 7
It becomes possible to carry out the installation work efficiently, and the sealing material 7 is reliably held without moving even when the silicone gel or the like expands or contracts.

In the above embodiment, the spacer 6 is provided with the recess 6c and the sealing material 7 is provided with the locking piece 7c.
A concave portion or a through hole may be provided in and the two may be locked together. Furthermore, although silicon gel has been described as an example of the optical medium 3, the present invention can be implemented in the same manner even if the optical medium 3 is a liquid.

[Effect of idea]

As explained above, according to this invention, the sealing material can be attached easily, accurately and reliably, and the practical value of this invention is great.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a cathode ray tube device which is an embodiment of this invention, Figs. 2 and 3 are perspective views and sectional views showing the main structure of Fig. It is a sectional view showing a pipe device. In the figure, 1 is a cathode ray tube, 2 is a lens unit, and 3 is a cathode ray tube.
6 is an optical medium, 6 is a spacer, 6a and 6b are protrusions, 6
7 is a recessed portion, 7 is a sealing material, 7a is an intermediate portion, 7b is a flange portion, 7c is a locking piece, and 7d is an injection port. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A cathode ray tube that reproduces images, a lens unit placed opposite to the cathode ray tube and that projects the images onto a screen, an annular protrusion that projects inward, and a lock consisting of a recess or protrusion formed on this protrusion. a spacer that supports the cathode ray tube and the lens unit at a predetermined distance; a locking portion that is engaged with the locking portion of the spacer; A cathode ray characterized by comprising an elastically deformable sealing material whose flanges at both ends are press-supported between the cathode ray tube and the lens unit, and an optical medium filled in a space formed by the cathode ray tube, the lens unit, and the sealing material. tube device.