JPH0754976B2 - Television image projection device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a television image projection apparatus for enlarging and projecting an image projected on a cathode ray tube (CRT) for television projection onto a screen by a projection lens. Is.

2. Description of the Related Art The configuration of a CRT 18 and a lens 13 in a general television image projection device is as shown in FIG.
With regard to, since the projection distance from the image to the screen is different between the left and right of the raster, the CRT 18 has a structure in which the lens 13 is tilted to adjust the focus level.

Among them, what is called an optical coupling structure is a CR equipped with a radiator 17 as shown in FIG.
On the front of the T18, the rear lens 13 for optical coupling is fixed, and the radiator 15 with a tilt is attached.
It has a structure that connects the. Reference numeral 16 is a positioning member made of resin, and a radiator is provided through this member 16.
17 is fixed to CRT18.

The problem to be solved by the invention is that in the conventional configuration as shown in FIG.
Radiator 17 and radiator 15 with a tilt
Therefore, there is a problem that the die and the unit price of the product become expensive.

Further, since the cooling liquid 14 is enclosed between the lens 13 and the CRT 18, there is a drawback that workability and reliability are likely to be deteriorated if the number of joints increases, but in the case of FIG. Radiator between 15 and 17
Since 17 and CRT 18 were connected with a bonding material,
There is a problem that this defect is likely to occur.

The present invention is intended to solve such a problem, and to provide a television image projection device having a simple structure in which reliability is improved by suppressing the number of joints to a minimum. It is intended.

Means for Solving the Problems The television image projection device of the present invention includes a radiator 1
And a spacer with a tilt are built into the interior of the lens, so that the coupling points for cooling liquid encapsulation can be
The feature is that it is the lowest point of T.

Effect The present invention simplifies the product shape by consolidating radiators into one, reduces the mold cost, and further incorporates a spacer with a tilt inside the radiator to minimize the cooling liquid sealing part. Even if it holds down, the reliability against liquid leakage can be improved.

Embodiment Hereinafter, the configuration of an embodiment of the present invention will be described with reference to FIGS. Reference numeral 1 is a lens designed for optical coupling, 2 is a projection for positioning the lens 1, 3 is a radiator for coupling the CRT and the lens 1, and further enclosing a cooling liquid, and the projection 2 is provided on the radiator 3. It is provided. 4 is a cooling liquid. 5 is a spacer for inclining the CRT, 6 is provided on the radiator 3,
Holes for positioning the spacer 5 and 12 are projections provided on the spacer 5 that fit into the holes 6. Reference numeral 7 is a CRT, and 8 is a bonding material such as an adhesive for fixing the lens 1 and the radiator 3. Reference numeral 9 denotes a tilt provided in the horizontal direction of the spacer 5, and 10 denotes a tilt provided in the vertical direction of the spacer 5. Reference numeral 11 denotes a base portion of the radiator 3, which is provided at four places. Positioning holes 6 are provided in two of them.

The protrusion 12 of the spacer 5, which is tilted in the positioning hole 6 provided in the base portion 11 of the radiator 3, is inserted. At this time, erroneous insertion is also prevented by changing the angles of A and B with respect to the two holes 6. In this way, the screen portion of the CRT 7 is inserted into the radiator 3 having the spacer 5 built therein.

Then, the bonding material 8 is injected between the radiator 3 and the CRT 7 and between the lens 1 and the radiator 3 by a dispenser (not shown) to perform the bonding. It is possible to improve reliability such as cost reduction and liquid leakage prevention. Conventionally, since the bonding material used is an organic substance, the cooling liquid evaporates from this bonding portion to a slight extent, and therefore, the smaller the number of bonding points, the better. In this respect, the configuration shown in FIG. 1 has a lens 1 and a radiator 3.
During this period, since the radiator 3 and the CRT 7 are only connected at two places, the number of connecting places is smaller than in the conventional case, and the evaporation of the cooling liquid can be suppressed.

Effects of the Invention As described above, the television image projection device of the present invention is
By consolidating the radiators having an optical coupling structure into one and incorporating a spacer with a tilt inside the radiator, the shape can be simplified.

Further, since the number of joints by the joint material can be minimized, the workability of assembling can be improved, the cost can be reduced, and the yield and reliability against liquid leakage can be improved. Are extremely advantageous.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a television image projection apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of a radiator of the apparatus, and FIGS. 3A, 3B and 3C are side views and planes of spacers of the apparatus. FIG. 4, a sectional view, and FIG. 4 are sectional views of a conventional television image projection apparatus. 1 ... Lens, 3 ... Radiator, 4 ... Coolant, 5 ...
... Spacer, 7 ... CRT, 8 ... Binding material, 9-10 ... Spacer tilt, 12 ... Spacer protrusion.

Claims (1)

[Claims] 1. A radiator for radiating heat is provided on the front surface of a cathode ray tube for projection of a television image, and a part of a projection lens optically cobbled is fixed in front of the radiator, and the lens and the cathode ray tube. A cooling liquid is sealed between the inside and the inside of the radiator, and a base portion for securing a certain distance in the arrangement of the mounting surface of the lens and the cathode ray tube is arranged inside the radiator. A spacer positioning hole is provided, and a spacer having a predetermined tilt angle made of resin so that the lens and the cathode ray tube form a predetermined angle with the hole as a reference is fixed inside the radiator. A television image projecting device.