JP2564919Y2 - Protective case for electric circuit - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective case for an electric circuit for storing and protecting an electric circuit formed on a substrate.

[0002]

2. Description of the Related Art Conventionally, as a protection case for an electric circuit of this type, the one shown in FIG. 3 is known. That is, the upper cover (outer cover) 1, the lower cover (outer cover) 2, and the rear cover 3 cover the substrate 4. On the substrate 4, an electric circuit is configured by electronic devices such as the transistor 5. ing. A connector 6 for external connection is provided on the substrate 4, and a connector insertion opening 7 is provided on the upper cover 1 and the lower cover 2 at a position corresponding to the connector 6. The connector insertion port 7 is formed so that an external connector (not shown) connected to the connector 6 can be inserted. Further, among the above-mentioned transistors 5, those which generate particularly large heat (for example, power transistors)
, A radiator plate 8 is attached via a screw N.

[0003]

However, in the above-mentioned conventional protective case for an electric circuit, if the position and the type of the connector 6 are different, an external connector can be connected to the connector 6 through the connector insertion opening 7. There is a disadvantage that it disappears. For this reason, every time the position or the type of the connector 6 is different, the upper cover 1 and the lower cover 2 which are large parts constituting the appearance must be newly manufactured.
There was a problem that the cost was high.

This invention has been made to solve the above-mentioned problem, and the purpose is to reduce the cost by diverting the outer cover constituting the external appearance even when the position and type of the connector are different. It is an object of the present invention to provide a protective case for an electric circuit that can be used.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a protective case for an electric circuit in which a substrate on which an electric circuit is formed is covered with a plurality of covers, wherein the substrate is vertically moved. A gutter-shaped upper cover and lower cover that are sandwiched and fixed from, and a rear cover that closes an opening formed on the rear side of the joined upper cover and lower cover,
The upper cover and a connector cover for closing an opening formed on the front side of the lower cover, wherein the connector cover has at least one connector for external connection provided on the substrate. A connector insertion port is provided for inserting an external connector to be connected to the connector, and an insertion port for inserting an external connector is provided at a position corresponding to an additional connector for external connection that may be added on the board. It is characterized by being provided so as to be able to be drilled by a contour line.

It is preferable that the connector cover is formed integrally with a heat radiating plate that emits heat generated from the electronic device on the board.

[0007]

In the protective case for an electric circuit configured as described above, when the position and the type of the connector are different, only the connector cover having a different position and shape of the connector insertion port is changed, and the outer cover is diverted. be able to. Therefore, a large part such as the outer cover can be diverted as it is, so that the cost can be reduced.

In the case where the connector cover is formed integrally with the heat radiating plate, heat generated by the electronic device is released from the connector cover to the outside of the case via the heat radiating plate. Accordingly, it is possible to more efficiently lower the temperature of an electronic device that generates a large amount of heat.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 and 2, an upper cover (outer cover) 11, a lower cover (outer cover) 12, and a rear cover 13 form an appearance in which a substrate 14 is covered. An electric circuit is constituted by electronic devices such as the transistor 15 and the connector 16 for external connection. Upper cover 11, lower cover 12, and rear cover 13
Is formed of a resin, and covers the periphery and the back of the substrate 14 so as to be sealed. Further, a substantially rectangular opening 17 having a size through which a plurality of connectors can be inserted at the same time is formed in the front-face matching portion of the upper cover 11 and the lower cover 12. The transistor 15 and the connector 16 are provided at the position of the opening 17 so as to face the opening 17.

The substrate 14 includes an upper cover 11 and a lower cover 1.
2 while being pinched by the boss portion B provided on
It is fixed to the upper cover 11 and the lower cover 12 by screws N1 penetrating these bosses B. This substrate 1
A heat radiating plate 18 made of a material having good thermal conductivity is provided below 4. The heat radiating plate 18 has a locking portion 19 that locks into the concave portion 14a cut out on both sides of the substrate 14, and a bracket portion 20 that is fixed to the substrate 14 via the screw N2.
Thus, it is attached to the substrate 14. The heat radiating plate 18 is spaced from the substrate 14 and the lower cover 12 by a predetermined distance. Further, the heat sink 18 has
A connector cover 21 for closing the opening 17 is integrally formed.

The connector cover 21 is formed by bending an end portion of the heat radiating plate 18 and is made of the same heat radiating material as the heat radiating plate 18. The connector cover 21 has a through hole 21a for inserting the screw N3 at a position corresponding to the transistor 15, and a connector insertion opening 21b at a position corresponding to the connector 16. The through hole 21a is connected to the transistor 15 through the screw N3 that is inserted therethrough.
Is connected to the connector cover 21. The connector insertion opening 21b is shaped so that only an external connector (not shown) connected to the connector 16 can be inserted, thereby improving the hermeticity in the case.

The connector cover 21 has a connector (not shown) which is added by an option or the like.
A contour line 21c having a shape through which these connectors can be inserted is formed. The outline 21c is formed by a thin through groove having a connection portion that can be easily cut.

In the protective case for an electric circuit configured as described above, when a connector is added due to an option or the like, the contour line 21 corresponding to the additional connector is provided.
The connector insertion hole is formed by penetrating the portion of c. In addition, for a board having a completely different position of the connector, a connector cover having a connector insertion opening corresponding to the position and shape of the connector is used. However, the upper cover 11, the lower cover 12, the rear cover 13 and the like are diverted as they are.

Therefore, according to the electric circuit protection case configured as described above, the upper cover 11 and the lower cover 1
Since large components such as the second and rear covers 13 can be diverted as they are, cost reduction can be achieved even when the position and shape of the connector are different. Moreover, even if the transistor 15 generates a large amount of heat, such as a power transistor, the generated heat can be directly released to the outside air via the connector cover 21. That is, the temperature of the transistor 15 can be more efficiently reduced.
Therefore, it is possible to improve the reliability of the electronic device that generates a large amount of heat.

In the above embodiment, the heat sink 18
Is arranged on the lower side of the board. However, when there is no electronic device or the like that requires heat dissipation at the back of the board, the heat dissipation plate 18 is removed and only the connector cover 21 has a heat dissipation effect. You may do so. Further, when there is no electronic device or the like that requires heat radiation, the heat radiation plate 18 may be omitted and the connector cover 21 may be formed of a resin plate or the like having a small heat radiation effect.

[0017]

According to the present invention, even if the position and type of the connector are different, a large part having an external appearance, such as an outer cover, can be diverted as it is, so that the cost can be reduced. In addition, when the connector cover is formed integrally with the heat sink, the heat generated by the electronic device can be released from the connector cover to the outside of the case. Thus, the reliability of the electronic device can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an electric circuit protection case shown as one embodiment of the present invention.

FIG. 2 is an external perspective view of an assembled state of the electric circuit protection case.

FIG. 3 is an exploded perspective view of an electric circuit protection case shown as a conventional example.

[Explanation of symbols]

 Reference Signs List 11 outer cover (upper cover) 12 outer cover (lower cover) 14 substrate 15 electronic device (transistor) 17 opening 18 heat sink 21 connector cover 21b connector insertion port

Claims (2)

(57) [Scope of request for utility model registration] 1. A protective case for an electric circuit configured to cover a substrate on which an electric circuit is formed with a plurality of covers, comprising: a gutter-shaped upper cover and a lower cover that sandwich and fix the substrate from above and below; A rear cover for closing an opening formed on a rear side of the upper cover and the lower cover, and a connector cover for closing an opening formed on a front side of the joined upper cover and the lower cover. The connector cover is provided with a connector insertion opening for inserting an external connector connected to at least one external connection connector provided on the board, and is additionally provided on the board. An electric circuit characterized in that an insertion hole for inserting an external connector is provided at a position corresponding to a possible additional connector for external connection so as to be pierceable by a contour line. Use protective case. 2. The protective case for an electric circuit according to claim 1, wherein the connector cover is formed integrally with a heat radiating plate that emits heat generated from the electronic device on the substrate.