JPH064638Y2 - Shield cover mounting structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a shield cover mounting structure, particularly to a frame of a shield cover used for an electronic device such as an ultra-small tuner used in a liquid crystal television or the like. Regarding improvement of mounting structure.

[Conventional technology]

Recently, an ultra-compact tuner with a volume of only a few cc has been developed for a handy-type LCD TV. Such an ultra-compact tuner simplifies the terminal holding mechanism as much as possible, and the shield cover is a frame body. The outside dimension is made smaller so that it does not go outside. The structure of the general ultra-small tuner is shown in FIGS. 3 to 6. That is, in the figure, 1 is a circuit board on which circuit wiring is made, and on this circuit board 1, chip parts 2
The circuit block 5 is configured by mounting electronic components such as 2, ..., Coils 3, 3, ... And terminals 4, 4.
Is inserted into the frame body 6 whose upper surface is opened. Cutout claws 6a, 6a ... Are formed on the wall surface of the frame body 6,
The claw bodies 6a, 6a ... Are bent inwardly of the frame body 6 at a right angle, locked to the earth pattern portions 1a, 1a, ... Formed on the upper surface of the circuit board 1, and fixed by soldering. here,
After the coils 3, 3, ... Are electrically adjusted, the shield cover 7 is inserted into the upper opening of the frame 6 and attached.

Here, the attachment structure of the shield cover 7 is such as shown in FIG. 7 so that the shield cover 7 does not protrude to the outside of the frame body 6. That is, a bending piece 8 which is bent in a dogleg shape at the edge of the shield cover 7 and has elasticity is formed, and the folded portion 8a of the bending piece 8 is fitted and abutted on the inner surface of the frame body 6 and stopped. It was supposed to be held.

[Problems to be solved by the invention]

However, according to this conventional shield cover mounting structure, when the bending piece 8 is formed large in order to facilitate the attachment of the shield cover 7 to the frame body 6, the bending piece 8 is mounted on the circuit board 1 by that much. Since the parts are close to each other, the arrangement of electronic parts on the circuit board 1 is restricted, and a dead space is generated on the circuit board 1, which hinders the miniaturization of the product.

Further, when the shield cover 7 is attached to the frame 6, there is a problem that the attachment position of the shield cover 7 is barracks in the vertical direction.

Therefore, the present invention has been made by paying attention to the problems of the related art, and by solving the problems, the size of the product can be reduced, and the workability of inserting the shield cover into the frame is improved. It is an object of the present invention to provide a shield cover mounting structure in which the mounting position of the shield cover is stabilized and the holding state can be strengthened.

[Means for trying to solve problems]

In order to achieve this object, a shield cover mounting structure of the present invention is a shield cover mounting structure comprising a frame body having a locking hole and a shield cover closing an opening surface of the frame body. The end edge portion of the cover has a support piece that abuts against the end portion of the opening surface of the frame body, and a fold portion that protrudes outward at approximately the center thereof, and the frame body is elastically pressed at the fold portion. A bent piece that abuts the inner wall surface of the bent piece, and the bent piece is provided with a locking piece cut and raised in the folding portion in a direction opposite to the tip direction of the bent piece. , Is engaged with the locking hole of the frame body.

[Action]

According to the shield cover mounting structure as described above, since the shield cover is held by effectively utilizing the wall thickness of the frame body, the space for the bent piece to be present in the frame body can be small. It is possible to reduce the size of the product because it is not necessary to take up wasted space on the circuit board. Also, when inserting the shield case into the frame, it is possible to work with the bending piece and the locking piece together. Therefore, the workability is good, and the mounting state is strong because the locking piece engages with the locking hole of the frame body and the folded portion of the bending piece abuts.

Furthermore, the vertical mounting position of the shield plate on the frame is
Since it is defined by the locking piece and the support piece, the mounting position does not vertically barrack.

〔Example〕

Next, an embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 1 is a cross-sectional view showing a main part of a shield cover mounting structure according to the present invention. In the figure, 10 is a frame body.
A rectangular locking hole 11 is formed near the upper opening of the.

On the other hand, reference numeral 12 in the figure denotes a shield cover attached to the upper opening of the frame body 10 described above.
The edge of 2 does not project to the outside of the frame 10
A supporting piece 13 placed on the opening edge is formed, and a bending piece 14 bent in a dogleg shape is formed so as to abut the inner surface of the frame body 10. The bent piece 14 has elasticity and is fitted and fixed to the inner surface of the frame 10 by the folded portion 14a.
A locking piece 15 that is in a linear state with the bending tip 14b of the bending piece 14 with the base end 4a and that extends in the direction opposite to the bending tip 14b is formed by cutting and raising. Here, when the shield cover 12 having such a configuration is fitted and attached to the upper surface opening of the frame body 10, the locking piece 15 is attached during work.
And the length H to the bending tip 14b of the bending piece 14 improves the insertability for work, and in the mounted state, the locking piece 15 is housed in the locking hole 11 formed in the frame body 10. Since it engages with the upper edge of the locking hole 11, the thickness of the wall of the frame body 10 is reduced, and the space of the bending piece 14 in the frame body 10 is only the length h. .

That is, in the shield cover mounting structure according to the present invention, the locking hole 15 formed by cutting and raising the bent portion 14a of the bending piece 14 of the shield cover 12 as the base end is formed in the frame body 10. 11 together with the folded portion 14
a is elastically brought into contact with the inner surface of the frame body 10 so that
Is held in the upper opening of the frame 10.

Further, since the vertical mounting position of the shield cover 12 on the frame body 10 is defined by the locking piece 15 and the support piece 13, the mounting position of the shield cover 12 is stable and stable.

[Effect of device]

As described above, according to the shield cover mounting structure of the present invention, in the work of fitting the shield cover to the frame, the length of the bending piece is the length from the locking piece to the bending tip. The workability is very good, and in the mounted state, the space occupied by the bending piece formed on the shield cover in the frame becomes small, which restricts the placement of electronic components on the circuit board. Since the product is miniaturized, the shield cover is held on the frame body by the engagement of the locking piece and the locking hole and the contact of the bent piece, so that the holding force is strong. Become.

Furthermore, since the mounting position of the shield cover in the vertical direction is defined by the locking piece and the support piece, the mounting position of the shield cover on the frame becomes stable.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a main part of a shield cover mounting structure according to the present invention, FIG. 2 is a front view seen from the direction of arrow A in FIG. 1, and FIG. FIG. 4 is an exploded perspective view of the tuner, FIG. 4 is a perspective view showing a state where a circuit board is attached to the frame, FIG. 5 is a perspective view showing a state where the shield cover is attached, FIG. FIG. 1 is a vertical sectional view showing a main part of a conventional shield cover mounting structure. DESCRIPTION OF SYMBOLS 10 ... Frame body, 11 ... Locking hole 12 ... Shield cover 14 ... Bending piece, 14a ... Folding part 15 ... Locking piece

Claims (1)

[Scope of utility model registration request] 1. A shield cover mounting structure comprising a frame body having a locking hole and a shield cover closing an opening surface of the frame body, wherein an opening of the frame body is provided at an edge portion of the shield cover. A support piece that abuts the end of the surface, and a bent portion that protrudes outward at a substantially central portion thereof, and a bent piece that abuts the inner wall surface of the frame by elastic force at the folded portion are provided. The bending piece is provided with a locking piece cut and raised in a direction opposite to the tip direction of the bending piece at the folding portion,
The shield cover mounting structure, wherein the locking piece is engaged with a locking hole of the frame body.