JPH0550880B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a shield case used when attached to a printed wiring board or the like to shield electrical components.

Configuration of conventional example and its problems First, an example of a conventionally used shield case will be explained using FIGS. 1 to 3.

As shown in FIG. 1, a claw 3 is provided on the upper edge of the shield case side wall plate 2 which is attached to the printed wiring board 1 by soldering. 2 and top cover 4,
The claws 3 are fixed by soldering, bending, or twisting.

In addition, as another example, as shown in FIGS. 2 and 3, a concave portion 8 is provided in the shield case side wall plate 6, and a convex portion 9 is provided in the upper lid 7, so that they fit together. A fixed method is used.

However, in the case of the example shown in Figure 1, the installation and removal work is time-consuming, and in the cases of the examples shown in Figures 2 and 3, when the lead wire drawn into the shield case is pulled by an external force, However, if the lead wire is pressed against the top lid, the elasticity of the lead wire itself may easily cause the top lid to come off inadvertently.

Purpose of the Invention The present invention eliminates such conventional drawbacks, and makes it possible to fix the top cover to the side wall plate of the shield case with a simple operation, prevent it from accidentally coming off, and facilitate the operation when removing it. The purpose of this is to provide a shield case that can be used.

Structure of the Invention In the shield case of the present invention, a shield case side wall plate having an opening on the top surface is fixed to a printed wiring board, and the upper cover is slid from the side of the shield case side wall plate to open the opening in the shield case side wall plate. When the top cover is slid to a specified position, a part of the top cover located at the front in the sliding direction is located below a part of the side wall plate of the shield case, and By configuring the top cover located at the rear in the sliding direction and the engagement claw provided on either one of the rear side wall plates of the shield case and the engagement hole provided on the other side to engage with each other, the top cover can be moved. The top cover is prevented from separating upward from the shield case side wall plate, and the L-shaped claw formed on the top cover is bent downward until it engages with the front side of the shield case side wall plate. It is configured to prevent movement in the reverse sliding direction.

In this way, it can be easily removed by raising the L-shaped claw, and it can be prevented from easily coming off in the attached state.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The first embodiment is shown in FIGS. 4 and 5.
In this shield case, the printed wiring board 10
An engaging pawl 12 is provided laterally on a shield case side wall plate 11 soldered to the shield case side wall plate 11, and an engaging hole 15 for engaging with the engaging pawl 12 is provided on the upper lid 14. Furthermore, the top lid 1
4 has an L-shaped claw 1 at a position facing the engagement hole 15.
7 will be provided.

With this configuration, the upper cover 14 is attached by sliding it from the side of the shield case side wall plate 11 to a predetermined position covering the opening formed above the shield case side wall plate, and the engaging claw 12 and the engaging hole 15 are engaged. By aligning the engaging portions, the upper cover is prevented from coming off in an upward direction.

Further, as shown in FIG. 5, an L-shaped claw 17 is provided on the top cover 15, and is bent to engage with the side surface of the side wall plate 11 after installation. Thereby, it is possible to prevent detachment due to sliding in the opposite direction to the sliding direction during installation.

When removing, the upper cover 14 can be easily removed by raising the L-shaped claw 17 to release the engagement, and then sliding the upper cover 14 in the opposite direction to the direction in which it was installed to remove the engagement.
can be removed.

Further, by providing the upper lid holding portion 22 on the side wall plate 11 facing the engaging portion, it is possible to prevent the upper lid 14 from coming off in the upward direction at this portion.

In addition, in order to ensure the engagement of the L-shaped claw 17, the L-shaped claw 17 is provided with a convex portion 18, and the L-shaped claw 17 is provided with a protrusion 18 on the opposing side wall plate 11 for fitting. The recess 20 may be provided.

In this way, the top cover 14 can be easily attached to and removed from the side wall plate 11, and the engaging portion and the L-shaped claw 17 can prevent accidental detachment.

Other embodiments are shown in FIGS. 6 and 7. In the shield case of this embodiment, the engaging claw 12, the engaging hole 15, and the convex portion 18 in the shield case of FIGS.
The positional relationship of the recessed portion 20 is reversed. To explain the structure, an engagement hole 13 is provided in the shield case side wall plate 11, an engagement claw 16 is provided in the upper cover 14, and an L-shaped claw 17 is provided in the upper cover in the opposite part.
has been established.

In this case as well, the same effect as in the case of FIGS. 4 and 5 can be obtained.

In addition, in this embodiment, the upper lid presser 22 is also attached to the upper lid 1.
4 is inserted under the side wall plate 11. Further, a recess 19 is provided in the L-shaped claw 17, and a fitting projection 2 is provided in the side wall plate 11 that the L-shaped claw 17 faces.
Even if 1 is provided, the same effects as in the embodiments shown in FIGS. 4 and 5 can be obtained.

Effects of the Invention As described above, according to the present invention, by sliding the top cover from the side of the shield case side wall plate and moving it to a predetermined position, the part of the top cover located at the front in the sliding direction is automatically moved. is located below a part of the side wall plate of the shield case, and the rear end of the top cover is prevented from separating upward by the engagement between the engagement claw and the engagement hole, and the top cover is L-shaped. By bending the shaped claw downward until it engages with the front side of the shield case side wall plate, the upper cover is prevented from moving in the opposite sliding direction once it has been slid into a predetermined position, and the upper cover is attached to the shield case side wall plate. Since it can be installed reliably, the work of installing the top cover is simple, and the conventional effort of soldering and bending at multiple locations and tools such as soldering irons and pliers can be eliminated. Furthermore, even if you attach the top cover to the shield case side wall plate by bending the L-shaped claw on the top cover and engaging it with the front side of the shield case side wall plate, the L-shaped claw may cause other problems. Since it does not protrude outward from the side wall plate of the shield case, the L-shaped claw can be made sufficiently large.
This makes it easier to bend the L-shaped claws during installation and removal, and the size of the L-shaped claws can be increased to prevent rapid brittle fracture even when bent. Just by making adjustments, you can obtain the necessary bending strength of the L-shaped claw.

In addition, since the shield case side wall plate and the top cover are fixed with an engaging claw, an engaging hole, and an L-shaped claw, they cannot be pulled inside like conventional ones that are fixed only by fitting a convex part and a concave part. It is possible to prevent the top cover from accidentally coming off due to the elasticity of the lead wire or some external force.

[Brief explanation of the drawing]

1 and 2 are perspective views showing the fixed state of the side wall plate and the top cover in a conventional shield case, FIG. 3 is a sectional view of the main parts thereof, and FIG. 4 is a diagram of a shield case in an embodiment of the present invention. FIG. 5 is a perspective view, FIG. 5 is a sectional view thereof, FIG. 6 is a perspective view of a shield case in another embodiment of the present invention, and FIG. 7 is a sectional view thereof. 10...Printed wiring board, 11...Shield case side wall plate, 12...Engaging claw, 13...Engaging hole, 14...Top lid, 15...Engaging hole, 16...Engaging claw, 17... ...L-shaped claw, 18...Protrusion, 19
...Hole, 20...Hole, 21...Protrusion, 22...
...Top lid pusher.

Claims (1)

[Claims] 1. A shield case side wall plate that is fixed to the printed wiring board so as to surround a part of the surface of the printed wiring board and has an opening on the top surface, and a predetermined part that is slid from the side of the shield case side wall plate and covers the opening. In the shield case, when the upper lid is slid to the predetermined position, a portion of the upper lid located forward in the sliding direction touches one of the side wall plates of the shield case. located below the section, and
An engaging claw provided on either one of the upper lid located at the rear in the sliding direction and a rear portion of the shield case side wall plate and an engaging hole provided on the other side are engaged with each other to move the upper lid upward. By bending the L-shaped claw formed on the upper lid until it engages with the front side surface of the shield case side wall plate, the upper lid is moved in the reverse sliding direction. A shield case that prevents the movement of.