JPH0513038Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention relates to a shield case used in high-frequency electrical equipment such as electronic tuners, and more specifically, it is a shield case that is arranged vertically and horizontally to partition the inside of a frame-shaped base member. The present invention relates to a connection structure between a shield partition plate and a shield cover.

<Conventional technology and its problems> Shield cases for high-frequency electrical equipment such as electronic tuners and switch controllers are constructed using a frame-shaped base member made by bending a metal plate, a shield partition plate, and a shield cover. Generally, FIGS. 5 to 7 show the structure of a shield case in an electronic tuner.

In the figure, the electronic tuner includes an electronic component wiring body 4 in which a tuner circuit component 3 is assembled and wired to a printed circuit board 2 inside a frame-shaped base member 1, and is fixed by soldering. The shield partition plate 5 is vertically fixed on the electronic component wiring body 4 in a vertical and horizontal arrangement, and the shield cover 6 is fitted into the upper and lower openings of the frame-shaped base member 1, and the upper shield cover 6 and the shield partition plate 5 are electrically connected.

As shown in FIGS. 6 and 7, the shield partition plate 5 has a mounting protrusion 7 protruding from its lower edge inserted into a slot 8 of the printed circuit board 2, and fixed by soldering 9 on the back side of the printed circuit board 2. The upper edge of the vertically standing shield partition plate 5 contacts the inner surface of the shield cover 6, and the two are electrically connected to prevent unnecessary high frequency radiation.

By the way, the conventional connection between the shield partition plate 5 and the shield cover 6 is achieved by forming the upper edge of the shield partition plate 5 into a straight edge and bringing this straight end face into contact with the shield cover 6. I was walking along.

However, the connection by end face contact has problems in that the contact is poor and unstable, and the shielding effect of each shield partition plate block is low and the insulation is poor.

<Purpose of the invention> This invention was made to solve the above-mentioned problems, and the shield partition plates are arranged vertically and horizontally, and the shield covers are connected by surface contact. The purpose of the present invention is to provide a shielding case that can enhance the electrical contact effect.

<Means for Solving the Problems> In order to solve the above problems, this invention has surface contact pieces with the shield cover on the upper edge of the shield partition plate, facing opposite directions on both sides of the partition plate. It has a protruding structure.

<Function> A shield partition plate, which has a plurality of surface contact pieces on the upper edge that are bent and coupled so that they protrude in opposite directions on both sides, is arranged vertically and horizontally inside a frame-shaped base member, and is mounted on a printed circuit board. When the shield cover is fitted into the opening of the frame-shaped base member, the surface contact piece contacts the inner surface of the shield cover, electrically connecting the shield partition plate and the shield cover, and the surface contact piece contacts the inner surface of the shield cover. Because they are located on both sides, they have an excellent elastic contact effect with the shield cover and reliably prevent unnecessary high-frequency radiation.

<Embodiment> Hereinafter, an embodiment in which the shield case of this invention is applied to the electronic tuner shown in FIG. 5 will be described based on FIGS. 1 to 4.

Note that the same parts as in FIGS. 5 to 7 are designated by the same reference numerals and will not be described.

In the shield case of this invention, the shield partition plates 5 disposed inside the frame-shaped base member 1 are separate pieces arranged crosswise in the vertical and horizontal directions, and the surface contact piece 11 with the shield cover 6 provided on the upper edge thereof are provided protruding in opposite directions on both sides of these partition plates, and the end surfaces of the surface contact pieces 11 that are adjacent to each other in the vertical and horizontal directions are brought into contact with each other. This prevents the plate 5 from tilting.

The surface contact piece 11 of the shield partition plate 5 is divided into a plurality of pieces in the longitudinal direction of the upper edge of the partition plate 5, each of which protrudes in opposite directions with its bending direction reversed, and makes surface contact with the shield cover 6 to reduce the amount of contact. By increasing the number of contact points and distributing the contact positions to both sides, tilting in the standing state is prevented.

In addition, the surface contact piece 11 provided on the shield partition plate 5
The number of allocations to both sides is not limited to that shown in the figure, and the number can be increased.

As described above, by providing a plurality of surface contact pieces on the upper edge of the shield partition plate so as to protrude in opposite directions, surface contact pieces are elastically brought into contact with the inner surface of the shield cover, and the pressure contact condition is 5 and can maintain good electrical contact with the shield cover 6 at all times.

<Effects> As described above, according to this invention, the shield partition plates are separate pieces arranged crosswise in the vertical and horizontal directions, and the surface contact piece with the shield cover provided on the upper edge is
By protruding in opposite directions on both sides of these partition plates, and by bringing the end surfaces of vertically and horizontally adjacent surface contact pieces into contact with each other, it is possible to prevent the shield partition plate from tilting and , the contact between the shield partition plate and the shield cover is a surface contact, and the surface contact pieces are distributed on both sides and the end surfaces of the surface contact pieces are brought into contact with each other, so that the shield partition plate does not tilt further during pressure welding,
Electrical contact between the shield partition plate and the shield cover is improved, and a shield case with excellent shielding effect can be provided.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view of the shield case according to this invention applied to an electronic tuner, Fig. 2 is an enlarged longitudinal cross-sectional view of the partition plate portion in the same as above, and Fig. 3 is a longitudinal cross-section along the arrow - in Fig. 2. 4 is a perspective view of the partition plate used in the above, FIG. 5 is a partially cutaway plan view of an electronic tuner using a conventional shield case, and FIG. 6 is an enlarged sectional view showing the partition plate portion in the above. , FIG. 7 is a longitudinal sectional view taken along the arrow - in FIG. 1...Frame-shaped base member, 2...Printed circuit board,
5... Shield partition plate, 6... Shield cover,
11... Surface contact piece.

Claims (1)

[Scope of utility model registration request] A vertical shield partition plate is arranged inside the frame-shaped base member, a shield cover is fitted into the upper opening of the frame-shaped base member, and the upper edge of the shield partition plate and the shield cover are electrically contacted, and the frame-shaped base member is In a shield case in which the inside of the base member is high-frequency shielded, the shield partition plates are separate pieces arranged crosswise in the vertical and horizontal directions, and the surface contact pieces with the shield cover provided on the upper edges of the partition plates are A shield case characterized in that both sides of the shield case protrude in opposite directions, and the end surfaces of vertically and horizontally adjacent surface contact pieces are brought into contact with each other.