JPH0810226Y2 - High frequency chassis case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a high-frequency chassis case used for a high-frequency tuner.

(Prior Art) Conventionally, this type of high-frequency chassis case has a structure of
It was as shown in FIGS.

That is, a square hole b is opened in the wall surface of the chassis case a,
The protrusion d provided on the shield plate c was inserted into the square hole b.

Then, the finished chassis case was manufactured so that the shield plate c did not move.

In order to fit the projection d of the shield plate c in the square hole b and prevent the shield plate c from coming into contact with the hole wall, the size of the square hole b should be equal to or larger than the thickness of the shield plate c. is necessary.

Therefore, the size of the square hole b is formed to be about 1.5 times the plate thickness of the shield plate c.

(Problems to be solved by the invention) However, since the size of the square hole b is formed to be about 1.5 times the plate thickness of the shield plate c as described above, the protrusion d is formed in the square hole b. When rattling or an external shock is applied, the hole wall surface of the square hole b and the side surface of the protrusion d come into contact with each other, resulting in electrical failure such as noise on the screen.

Conventionally, in order to prevent this electrical failure, the protrusion d
Solder was used in the portion of the square hole b into which the protrusion was inserted to prevent the protrusion d from rattling in the square hole b.

However, when solder is used in this way, there is a problem that the soldering work takes time.

An object of the present invention is to solve the above-mentioned conventional problems.

(Means for Solving the Problems) A chassis case according to the present invention is a high-frequency chassis case having a frame-shaped chassis case body and a shield plate arranged so as to partition the chassis case body. The chassis case main body and the shield plate are integrally formed by bending one metal plate, and the chassis case main body is provided between the inner wall surface of the chassis case main body and the end surface of the shield plate. It is characterized in that a clearance capable of preventing contact with the shield plate due to external impact is provided throughout.

(Operation) This invention breaks down the technical concept that was conventionally thought to require that the chassis case body and the shield plate always contacted each other, and as described above, the wall surface of the chassis case body and the shield plate By creating a clearance between them and creating a non-contact surface, it is possible to prevent electrical defects such as noise on the screen due to external impact.

(Embodiment) An embodiment of a high-frequency chassis case according to the present invention will be described below with reference to the drawings.

FIG. 1 is a front sectional view showing a main part of a high-frequency chassis case according to the present invention, FIG. 2 is a developed view of the high-frequency chassis case, and FIG. 3 is a perspective view of the main part when the assembly is completed.

The high frequency chassis case of the present invention is shown in FIG.
It is formed by bending a sheet of metal material. As shown in FIG. 1, the shield plate 2 partitions the inside of the chassis case body 1 from the chassis case body 1 formed in a frame shape. Is bent so that Then, between the inner wall surface 11 of the chassis case body 1 and the shield plate 2, a clearance 3 capable of preventing contact with the shield plate 2 due to an external impact of the shield case body 1.
Is provided.

The clearance 3 has a maximum size of 0.3 mm and a minimum size of 0.2 mm.

Explaining the reason, when the clearance 3 is smaller than 0.2 mm, the shield plate 2 is not affected by an external impact.
This is because there is a possibility that the side surface of the chassis and the inner wall surface 11 of the chassis case body 1 may come into contact with each other, causing an electrical defect such as noise on the screen.

If the clearance 3 is larger than 0.3 mm,
This is because the circuit configuration is difficult and another electrical failure may occur.

In the high-frequency chassis case of the present invention, as described above, the clearance 3 is provided between the inner wall surface 11 of the chassis case body 1 and the shield plate 2, so that the shield plate 2 and the chassis case body 1 are outside. There is no contact with the impact.

Therefore, no electrical failure such as noise on the screen occurs.

(Effect of the Invention) As described above, in the present invention, the shield plate integrated with the chassis case body is bent so as to be orthogonal to each other, and the inner wall surface of the chassis case body and the shield plate are combined. Since a clearance is provided between the chassis case body and the shield plate to prevent contact with the shield plate due to an external impact, there is no risk of the chassis case body and the shield plate coming into contact with each other due to an external impact. It is possible to prevent the occurrence of electrical failure that noise is generated due to.

As a result, there is no need to perform soldering, which has been performed conventionally, and it is possible to reduce the time required for producing a mold and to significantly reduce the production cost.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an essential part of an embodiment of a high-frequency chassis case according to the present invention, FIG. 2 is a developed view of the high-frequency chassis case, and FIG. 3 is a perspective view of the essential part when the assembly is completed. Fig. 4 and Fig. 4 are development views of a conventional high-frequency chassis case, Fig. 5 is a partial perspective view when the assembly is completed, Fig. 6 is a side view of the square hole part, and Fig. 7 is the chassis case body. It is a front sectional view showing an attachment state with a shield plate. 1 …… Chassis case body 11 …… Inner wall surface 2 …… Shield plate 3 …… Clearing

Claims (1)

[Scope of utility model registration request] 1. A chassis case body having a frame shape,
In a high-frequency chassis case having a shield plate arranged so as to divide the chassis case body,
The chassis case main body and the shield plate are integrally formed by bending a single metal plate, and the chassis case main body and the shield plate have an outer surface between the inner wall surface of the chassis case main body and the end surface of the shield plate. A high-frequency chassis case, which is provided with a clearance that can prevent contact with a shield plate due to a physical impact.