JPS5852702Y2 - Housing for circuit equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a housing for a circuit device, and an object of the present invention is to easily and inexpensively create a type of circuit device in which the opening of a frame-shaped case that houses a circuit board is covered with a case cover. With the goal.

As a conventional circuit device, the one shown in FIG. 1 and FIG. 2 has been considered, and this will be explained.

Both FIG. 1 and FIG. 2 are sectional views showing a part of the circuit device.

Components that are the same in each figure are designated by the same reference numerals.

Reference numeral 1 in each figure indicates a case having a frame shape as a whole, in which a circuit board 2 is housed, and a case cover 3 (3a, 3b) is fitted therein.

The lower part of the board 2 has a wiring pattern, and the lead wires 5 of the circuit components 4 arranged above are soldered.

In FIG. 1, the tip of the lead wire 5 protrudes below the board 2 by an amount h, and therefore the board 2 is mounted a distance H (h<H) from the lower end 1a of the case 1. .

In FIG. 2, the protruding piece 6 of the case cover 3b comes into contact with the lower end 1a of the case 1 and the case cover 3b is fitted into the case, so that the board 2 is pushed closer to the lower end 1a of the case 1 by H'( h is slightly longer than H'),
There is a space H"(H'<H") between the flat part 3C of the case cover 3b and the lower side of the substrate 2.

In conventional circuit devices, a housing consisting of a case and a case cover each constructed as described above is used, but according to this, in the case of Fig. 1, the same one can be used as the upper and lower case covers. , In order to make H larger than h, it is necessary to have a process for attaching the circuit components and the board and a process for attaching the case and the board, or to attach the circuit components and the case to the board at the same time (in this case, the board is attached to the lower edge of the case). The lead wire must then be cut so that the tip of the lead wire is at a distance of H from the end of the lead wire.

For this reason, workability is poor. In the case of Fig. 2, the circuit components and the case are attached to the board at the same time (at this time, the lower end of the board and the case are separated by H'), and then the tip of the lead wire is attached at h. When cutting, h may be slightly longer than H', and this can be easily done using an automatic cutter or the like.

Since h and H' are installed in a substantially equal state, the lower case cover is usually provided with a protruding piece, and the upper case cover is not provided with a protruding piece.

This is because if a cover with a protrusion is used as the upper case cover, the thickness will increase.

As described above, conventional methods have had the disadvantages of poor workability on the one hand and the necessity of using a different case cover on the other hand.

The casing for a circuit device of the present invention eliminates the disadvantages of the casing used in the conventional circuit device, and will be explained with reference to a partially exploded perspective view shown in FIG.

The frame-shaped case 30 accommodates a circuit board 31, and case covers 32 (32a, 32b) are fitted above and below.

The circuit components 33 located on the upper surface of the substrate 31 are connected to the wiring pattern on the lower surface.

The upper end 30a of the case 30 is provided with a plurality of notches 34, and the lower end 30b is a flat portion.

The case cover 32 (32a, 32b) has a plurality of projecting pieces 35 formed by a part of the cover.

The case cover 32a and the case cover 32b are formed of the same metal mold.

When the case 30 and the case cover 32 are fitted together, the projecting piece 35 of the case cover 32b is attached to the lower end 30 of the case 30.
b, and there is sufficient space between the lower surface of the substrate 31 and the main surface B of the case cover 32b.

Therefore, when the circuit component 33 is soldered to the wiring pattern, there is no possibility that the circuit component 33 and the main surface B of the case cover 32b will be short-circuited and the circuit device will be damaged.

Further, the projecting piece 35 of the case cover 32a is fitted into the notch 34 of the case 30 so that the main surface A is aligned with the upper end 30 of the case 30.
Close to a.

Note that the notch 3 provided in the upper end 30a of the case 30
4 are provided symmetrically, and projecting pieces 3 of the case cover 32
5 is also provided symmetrically in correspondence with the notch 34, and since there is no left-right directionality, the cover can be easily attached.

The fitting portion 36 of the case cover provided with the protruding piece 35 can easily be fitted into the case 30 because both sides of the protruding piece 35 tend to have elasticity.

As described above, the circuit device casing according to the present invention includes a frame-shaped case that houses a circuit board, and a second frame-shaped case that covers an opening of the frame-shaped case.
In a circuit device housing consisting of two case covers,
Each case cover that covers the opening is provided with a protrusion that faces the edge of the frame-like case, and the protrusion of the case cover abuts the edge of the frame-like case on one opening side, and the protrusion on the other opening side. In this case, the projecting piece is fitted into the notch provided at the end of the frame-like case, and the main surface of the case cover is in direct contact with the end of the case, so the case cover is formed with the same mold. Since only one type is required, an inexpensive circuit device can be obtained.

Furthermore, even if the board to be housed in the case is installed at the same time as the circuit components are soldered, there is no risk of damage to the device due to a short circuit between the case cover and the lead wires of the circuit components, which improves work efficiency. It is suitable for making circuit devices.

[Brief explanation of the drawing]

FIGS. 1 and 2 are sectional views each showing a part of a conventional circuit device. FIG. 3 is a partially exploded perspective view of a circuit device using the circuit device casing of the present invention. 30... Frame-shaped case, 30a... Upper end of the case, 30 b... Lower end of the case, 31... Circuit board, 32... ...Case cover, 32a... Upper case cover, 32b
...Lower case cover, 33 ...Circuit components, 34 ...Notches, 35 ...Protrusions,
36...Case cover fitting part, A...
-Main surface of case cover 323, B...Main surface of case cover 32b.

Claims (1)

[Scope of utility model registration request] In a circuit device housing consisting of a frame-shaped case that houses a circuit board and two case covers that cover an opening of the frame-shaped case, each case cover that covers the opening has a protrusion that faces the end of the rod-shaped case. is provided, and on one opening side, the projecting piece of the case cover is brought into contact with the end of the frame-shaped case,
On the other opening side, a projecting piece is fitted into a notch provided at an end of the frame-like case, and the main surface of the case cover directly contacts the end of the case.