JP2011065748A - Electronic control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To overcome the problem in a conventional art, wherein a fitting is only mounted on surfaces of both ends of a connector so that the fitting and a substrate are easy to peal if a force is applied thereto from the external. <P>SOLUTION: The electronic control device includes a circuit board on which electronic parts are mounted, a connector having a fitting for fixating the circuit board and a terminal pin for connecting to the outside, a housing for protecting the circuit board, and an enclosure sandwiching the circuit board and the connector. The terminal pin and the fitting are connected by soldering, the fitting is fixated on surfaces of both ends and upper surface of the connector, and the upper surface of the connector and the enclosure are connected via an adhesive. An electrically conductive sealant may be used for the adhesive. The adhesive for bonding the enclosure and the connector, and the adhesive for bonding the fitting and the enclosure may be the same material. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electronic control device on which an SMT (Surface mount technology) connector is mounted.

  Conventionally, there is a technique in which metal fittings are attached to both end faces of a connector, and the metal fittings and a substrate are connected by solder (see Patent Document 1). The SMT connector is composed of an insulating housing, a metal shield, and a board lock formed integrally with the terminal pin. The claw of the board lock bites into the inner wall of the circuit board where the circuit is formed, and the terminal pin is surface-mounted with the pad. There is an electronic control device having a structure (see Patent Document 2).

JP 2004-319229 A JP 2002-324606 A

  According to Patent Document 1, since the metal fittings are attached only to both end surfaces of the connector, there is a problem that the metal fittings and the substrate are easily peeled off when a force is applied from the outside.

  According to Patent Document 2, the metal fitting covers the entire connector and is connected to the board. However, in the connection part between the metal fitting and the board, the metal fitting is only inserted into the hole of the board. Similarly, there exists a subject that a metal fitting and a board | substrate are easy to peel off.

  Accordingly, an object of the present invention is to provide an electronic control device in which the connection between a connector and a board is further strengthened.

  In order to solve the above problems, one of the desirable aspects of the present invention is as follows.

  The electronic control device includes a circuit board on which electronic components are mounted, a metal plate for fixing the circuit board, a connector having terminal pins for connection to the outside, a housing for protecting the circuit board, a circuit board, and a connector. The terminal pins and the metal fittings are connected by soldering, the metal fittings are fixed at both end surfaces and the upper surface of the connector, and the upper surface of the connector and the housing are connected via an adhesive.

  ADVANTAGE OF THE INVENTION According to this invention, the electronic control apparatus which strengthened the connection of a connector and a board | substrate can be provided.

FIG. 3 is a cross-sectional view illustrating the electronic control device according to the first embodiment. Sectional drawing which shows the electronic control apparatus by the side of the terminal pin connection surface of FIG. Sectional drawing which shows the electronic control apparatus of Example 2. FIG. Sectional drawing which shows the electronic control apparatus of Example 3. FIG. Sectional drawing which shows the electronic control apparatus of Example 3. FIG. Sectional drawing which shows the electronic control apparatus of Example 3. FIG. Sectional drawing which shows the electronic control apparatus of Example 3. FIG. Sectional drawing which shows the electronic control apparatus of Example 4. FIG. Sectional drawing which shows the electronic controller with which the both-ends clip of FIG. 7 was united.

  Examples will be specifically described below.

  FIG. 1 is a cross-sectional view showing the periphery of an SMT connector (hereinafter referred to as a connector) of an electronic control device.

  A connector 1 comprising a terminal pin 4 for connection to the outside and a housing 2 that protects the terminal pin 4 is fixed to a circuit board 5 via a metal fitting 3 that is fixed so as to be partially exposed to the outer periphery. The metal fitting 3 is fixed to the both ends of the connector 1 and covers the entire upper surface. The metal fitting 3 and the circuit board 5 are fixed by solder 10.

  The metal fitting 3 is in contact with a cover (hereinafter referred to as a housing) 8 of a housing that sandwiches the circuit board 5 and the connector 1 vertically. The pads 6 of the circuit board 5 are mounted with solder 10, and the metal fitting 3 and the housing 8 are bonded via an adhesive 9.

  Here, in order to realize an electronic control device having excellent heat dissipation, it is preferable to use the adhesive 9 as a conductive sealant. Thereby, an earth circuit can be electrically connected from the circuit board 5 to the metal fitting 3, the conductive sealant, and the housing 8.

  In order to make the connector 1 and the housing 8 stronger, the adhesive 9 is preferably an insulating sealant. Examples of the adhesive for securing waterproofness and airtightness include a thermosetting type, a room temperature curable type, and an ultraviolet curable type.

  FIG. 2 is a cross-sectional view showing the electronic control device on the terminal pin connection surface side of FIG.

  The metal fitting 3 mounts the solder 10 on the same surface as the solder 10 mounting surface of the terminal pin 4, and the electronic component 7 is arranged on the back side of the circuit board 5 of the solder 10 mounting surface of the metal fitting 3 and the circuit board 5.

  FIG. 3 is a cross-sectional view illustrating the electronic control device according to the second embodiment.

  In order to fix the terminal pin 4 and the connector 1, the metal fitting 3 fixed in a form exposed on the outer periphery of the housing 2 is bonded to the housing 8 via an adhesive 9.

  The same material may be sufficient as the adhesive agent for adhere | attaching the housing | casing 8 and the connector 1, and the sealing agent for adhere | attaching the metal fitting 3 and the housing | casing 8. FIG. If it does so, the application | coating process of adhesion | attachment with the housing | casing 8 and the connector 1 and adhesion | attachment with the metal fitting 3 and the housing | casing 8 can be performed at once.

  4-7 is sectional drawing which shows the electronic control apparatus of Example 3. FIG.

  In FIG. 4, the metal fitting 3 integrally molded with the housing 2 is covered with the resin of the housing 2 except for the solder 10 mounting surface with the circuit board 5 and the contact surface with the housing 8. Since the metal fitting 3 and the housing 2 are integrally molded, the number of steps for assembling the connector 1 can be reduced, and an earth circuit for the circuit board 5 can be secured.

  In FIG. 5, the housing 8 sandwiches the metal fitting 3 from both sides and is in contact with the metal fitting 3 and the housing 8, thereby providing a heat dissipation path for the electronic component 7 and a ground path for the circuit board 5.

  In FIG. 6, contact with the housing 8 from the upper side of the solder 10 mounting surface of the metal fitting 3 prevents the solder 10 from cracking between the pad 6 and the metal fitting 3 and concentrates the stress on the koji, thereby improving the koji strength. .

  In FIG. 7, in order to sandwich the housing 2, a metal clip 11 sandwiches the housing 2 between the circuit board 5 provided with a hole and the clip 11. The housing 8 and the clip 11 are brought into contact with the housing 8 through the adhesive 9 to provide a ground to the housing 8. Further, the clip 11 sandwiches the circuit board 5 and the housing 2 to reduce stress concentration on the solder between the metal fitting 3 and the pad.

  FIG. 8 is a cross-sectional view illustrating an electronic control device according to a fourth embodiment.

  A solder 10 is mounted on the pad 6 and the metal fitting 3 of the circuit board 5. The clip 11 is U-shaped when viewed from the cross-sectional view of FIG. 8, and is fixed by sandwiching the circuit board 5 and the metal fitting 3, so that the cracks of the solder 10 between the pad 6 and the metal fitting 3 are concentrated by stress. And the peeling of the pad 6 is prevented. Alternatively, the solder 10 is eliminated by fixing the circuit board 5 and the metal fitting 3 with the clip 11, and the metal clip 11 receives the twisting load.

  Further, as shown in FIG. 9, clips 11 on both sides that are fixed with the circuit board 5 and the metal fitting 3 interposed therebetween are connected to both sides of the housing 2. Then, by pressing the clip 11 into the recess at the lower part of the housing, there is an effect of reducing the warp of the housing 2 and the circuit board 5 due to a temperature change and improving the twisting strength.

  According to the present invention, the metal fitting exposed to the connector and the circuit board on which the electronic component is mounted are connected by the ground circuit, so that the heat of the electronic component requiring heat radiation is transferred to the housing. Can be missed.

DESCRIPTION OF SYMBOLS 1 Connector 2 Housing 3 Metal fitting 4 Terminal pin 5 Circuit board 6 Pad 7 Electronic component 8 Case 9 Adhesive 10 Solder 11 Clip

Claims (7)

A circuit board for mounting electronic components;
A metal fitting for fixing the circuit board, and a connector having terminal pins for connection to the outside;
A housing that protects the circuit board; and a housing that sandwiches the circuit board and the connector.
The terminal pin and the metal fitting are connected by solder,
The metal fittings are fixed at both end surfaces and the upper surface of the connector,
An electronic control device, wherein the upper surface of the connector and the housing are connected via an adhesive.   The electronic control device according to claim 1, wherein the adhesive is a conductive sealant.   The electronic control device according to claim 1, wherein the adhesive is an insulating sealant.   The electronic control device according to claim 1, wherein an adhesive for bonding the housing and the connector and an adhesive for bonding the metal fitting and the housing are made of the same material. A clip for fixing the connector and the circuit board;
The electronic control device according to claim 1, wherein a surface on which the circuit board and the clip are hooked is connected to a ground circuit, and is bonded to the cover via the clip and the adhesive.   The clip and the circuit board are sandwiched from the end face side of the circuit board by the clip, the clips at both ends are connected, a recess is provided from the connector opening side of the lower part of the housing, and the clip is press-fitted from the connector opening side. The electronic control device according to claim 1. A circuit board for mounting electronic components;
A metal fitting for fixing the circuit board, and a connector having terminal pins for connection to the outside;
A housing protecting the circuit board;
A housing for sandwiching the circuit board and the connector;
The terminal pin and the metal fitting are connected by solder,
The electronic control device, wherein the circuit board and the metal fitting are fixed with being sandwiched in a U-shape.

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