JP2016170857A - Electronic circuit device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic circuit device in which the location of a connector 7 to a housing 3 is set when the connector 7 is secured to the housing 3 through adhesive agent 28.SOLUTION: A connector 7 includes a connector bottom wall 15, a peripheral wall 16 surrounding the bottom wall 15 in a rectangular shape, a fixing portion 18 which is continuous in a rectangular shape having a relatively large thickness from a portion which partially projects outwards from the peripheral wall 16, two positioning portions 20, 20 which project upwards and downwards from the fixing portion 18 and have a rectangular cross-section. These positioning portions 20, 20 are respectively provided with cylindrical positioning protrusions 21, 21 protruding from the tips thereof to the opposite side to the peripheral wall 16. When the connector 7 is secured to a controller housing 3 via adhesive agent 28, the positioning projection 21 of the connector 7 is engaged with a recess portion 25 formed in the controller housing 3.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an electronic circuit device used for, for example, an electric brake of an automobile.

  In general, an electronic circuit device includes a synthetic resin connector in which a plurality of terminals are insert-molded, a housing to which the connector is attached, and a circuit board to which tip ends of the plurality of terminals are fixed. In the electronic circuit device of Patent Document 1, in order to attach the connector to the housing, a groove is formed on the housing side, and a protruding portion that is inserted into the groove is formed on the connector side. A predetermined gap remains between these grooves and the projecting portion, and this gap is filled with an adhesive.

JP 2013-69439 A

  When the connector is attached to the housing via the adhesive in the electronic circuit device as described above, the movement of the protruding portion of the connector within the groove of the housing is allowed to some extent when the adhesive is uncured. The groove and the protrusion do not contribute to the positioning of the connector with respect to the housing. Therefore, the position of the connector relative to the housing may make it difficult to insert the tip of the connector terminal into the corresponding through hole of the circuit board.

In the present invention,
A connector made of synthetic resin,
A housing having an opening to which the connector is attached;
A circuit board housed in the housing;
A plurality of terminals, one end of which is insert-molded in the connector, and fixed to the circuit board through the opening,
In an electronic circuit device in which the connector is attached to the opening through an adhesive,
The connector has a positioning projection that engages with a recess or a through hole formed in the housing at a position away from the adhesive.

  In such a configuration, when the connector is attached to the opening of the housing via the adhesive, the positioning protrusion is engaged with the recess or the through hole on the housing side, whereby the position of the connector with respect to the housing is positioned.

  According to the present invention, the mounting position of the connector with respect to the housing is ensured at the expected position, and the terminal insert-molded into the connector can be smoothly inserted into the corresponding through hole formed in the circuit board, A stable seal is created.

It is the perspective view which showed the electric brake device provided with the electronic circuit apparatus which concerns on this invention. It is the perspective view which looked at the controller housing of FIG. 1 from the back side. FIG. 3 is a cross-sectional view of the controller housing and the connector along the line AA in FIG. 2. FIG. 4 is an enlarged cross-sectional view of a portion of a controller housing to which the connector of FIG. 3 is attached. It is the perspective view which looked at the connector shown in FIG. 2 from the circuit board side. It is sectional drawing which shows the 2nd Example of the electronic circuit apparatus which concerns on this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows an electric brake device including an electronic circuit device according to the present invention. The electric brake device includes an actuator housing 1 that houses an electric motor and a ball screw mechanism (both not shown) constituting a booster mechanism, and a controller 2 that controls the driving of the electric motor. The controller 2 includes, as a casing, a controller housing 3 having a rectangular shallow dish shape, and a cover 4 having a rectangular shallow dish shape covering the opening surface of the controller housing 3 as illustrated. The controller housing 3 is attached to the actuator housing 1 with two screws 5, and the cover 4 is attached to the controller housing 3 with another two screws 6. A lower portion of the controller housing 3 protrudes downward from the actuator housing 1, and a synthetic resin connector 7 is attached to the back side of the protruding portion.

  The controller housing 3 is formed as a die cast of a metal member, for example, an aluminum alloy excellent in heat conduction. The circuit board 10 is accommodated in the space inside the flange portion 8.

  The circuit board 10 is fixed to the controller housing 3 by a plurality of screws 11 arranged at a plurality of peripheral points and a central point. In this attached state, the circuit board 10 is slightly between the housing bottom wall 9 and the controller housing 3. A gap 12 (see FIG. 3) is secured. Accordingly, some electronic components (not shown) mounted on the back side of the circuit board 10 (surface facing the controller housing 3) are accommodated in the gap 12.

  As shown in FIGS. 2 and 3, the circuit board 10 has a plurality of terminals insert-molded in the connector 7 through the corresponding through-holes formed in the circuit board 10 and then the circuit board 10. Soldered to a front side pattern (not shown). The plurality of terminals are a set of terminals composed of an upper terminal 13 and a lower terminal 14, which will be described later, aligned in the vertical direction, and the width direction of the controller housing 3 (the direction along the short side 3a of the controller housing 3). Are arranged so that a plurality of sets are continuous.

  FIG. 3 is a cross-sectional view of the controller housing 3 and the connector 7 along the line AA in FIG. 2, and shows a set of terminals 13 and 14 among the above-described multiple sets of terminals.

  FIG. 4 is an enlarged schematic view of the lower part of the controller housing 3 of FIG. The connector 7 includes a connector bottom wall 15 and a peripheral wall 16 surrounding the connector bottom wall 15 in a rectangular shape. The connector bottom wall 15 and the peripheral wall 16 form a recess 17. A metal and linear upper terminal 13 and lower terminal 14 are fixed to the connector bottom wall 15 by insert molding, and these terminals 13 and 14 are surrounded by the peripheral wall 16. A plug (not shown) is inserted into the recess 17 of the connector 7, and two corresponding terminals provided on the plug are connected to the two terminals 13 and 14 on the connector 7 side, respectively.

  The connector bottom wall 15 partially protrudes outward from the peripheral wall 16, and a mounting portion 18 that is continuous in a relatively thick rectangle extends from the protruding portion toward the circuit board 10. A rectangular continuous groove 19 that opens to the circuit board 10 side is formed on the front end surface 18 a of the mounting portion 18.

  As shown in FIG. 5, the connector 7 further includes two positioning portions 20, 20 having a rectangular cross section projecting upward and downward from the central portions of the upper and lower long sides 18 a, 18 a of the attachment portion 18. ing. Here, the two positioning parts 20 and 20 have the same shape. Further, the positioning portions 20 and 20 are provided with columnar positioning protrusions 21 and 21 that protrude from the tips of the positioning portions 20 and 20 to the side opposite to the peripheral wall 16. Here, the two positioning protrusions 21 and 21 have the same shape. The positioning protrusions 21 and 21 extend in parallel with the upper terminal 13 and the lower terminal 14.

  As shown in FIG. 4, the controller housing 3 has a rectangular opening 22 through which the upper terminal 13 and the lower terminal 14 pass, and the circuit board extends from the housing bottom wall 9 along the periphery of the opening 22. 10 is provided with a relatively thin mounting protrusion 23 that extends on the opposite side to 10. The thickness of the mounting protrusion 23 is smaller than the groove width of the groove 19 of the mounting portion 18. Furthermore, the protruding length of the mounting protrusion 23 (the length in the direction orthogonal to the housing bottom wall 9) is shorter than the depth of the groove 19 of the mounting portion 18. Therefore, in a state where the mounting protrusion 23 is inserted into the groove 19, a predetermined gap 24 remains between the mounting protrusion 23 and the groove 19.

  On the housing bottom wall 9 of the controller housing 3, recesses 25 into which the positioning protrusions 21 of the positioning portion 20 are inserted are formed at two locations above and below the opening 22. The recess 25 opens toward the connector 7 and includes a recess bottom wall 26 that is partially recessed from the housing bottom wall 9 toward the circuit board 10, and a side wall 27 that surrounds the recess bottom wall 26 in a circular shape. Have. The inner diameter of the recess 25 corresponds to the diameter of the positioning protrusion 21.

  The connector 7 is attached to the mounting protrusion 23 of the controller housing 3 by applying an adhesive 28 in the groove 19 of the mounting portion 18. At this time, the two positioning projections 21, 21 on the connector 7 side engage with the corresponding two recesses 25, 25 on the controller housing 3 side, so that the vertical movement of the connector 7 with respect to the controller housing 3 is restricted. The Therefore, until the adhesive 28 is cured, the mounting protrusion 23 on the controller housing 3 side is positioned at a predetermined position in the groove 19 of the mounting portion 18 on the connector 7 side. Then, the adhesive 28 is cured while maintaining the predetermined positional relationship between the mounting protrusion 23 and the groove 19. The positioning protrusion 21 is located away from the application region of the adhesive 28, and directly engages the recess 25 without the adhesive 28 being interposed, and positioning with high accuracy is performed. Thereby, the position of the connector 7 with respect to the controller housing 3 is positioned in a direction orthogonal to the upper terminal 13 and the lower terminal 14.

  Further, in the mounting state, the front end surface 18 a of the mounting portion 18 and the lower side surface 20 a of the positioning portion 20 that is continuous therewith are in contact with the upper surface 9 a of the housing bottom wall 9. Thereby, the movement of the connector 7 in the thickness direction of the housing bottom wall 9 is also restrained. Therefore, the position of the connector 7 with respect to the controller housing 3 in the direction parallel to the upper terminal 13 and the lower terminal 14 is positioned.

  As the adhesive 28 in this embodiment, a general adhesive or FIPG (Formed In Place Gasket) having higher sealing properties is used.

  Since the concave portion 25 on the controller housing 3 side and the positioning projection 21 on the connector 7 side are used for positioning the connector 7 with respect to the controller housing 3 as described above, it is orthogonal to the upper terminal 13 and the lower terminal 14. The connector 7 is accurately positioned with respect to the controller housing 3 with respect to the direction in which the terminals 13 and 14 inserted into the connector 7 are smoothly inserted into the corresponding through holes 29 and 30 formed in the circuit board 10. Can be inserted into.

  In a state where the positioning projection 21 is engaged with the recess 25, the lower surface 20 a of the positioning portion 20 of the connector 7 is in contact with the upper surface 9 a of the housing bottom wall 9. Also, the position of the connector 7 with respect to the controller housing 3 is positioned.

  Further, when the connector 7 is attached to the controller housing 3 via the adhesive 28 as described above, the mounting projection 23 on the controller housing 3 side of the mounting portion 18 on the connector 7 side is fixed until the adhesive 28 is cured. Since it is positioned at a predetermined position in the groove 19, the adhesive 28 is cured with a constant thickness over the entire circumference while the mounting projection 23 is in the predetermined position, and a stable sealing property is produced. It is done.

  Further, since the concave portion 25 and the positioning protrusion 21 are used for positioning the connector 7 with respect to the controller housing 3, it is not necessary to provide an automatic machine for positioning the connector 7.

  FIG. 6 shows a second embodiment of the electronic circuit device according to the present invention. In this embodiment, the housing bottom wall 9 of the controller housing 3 is provided with an identical through hole 31 penetrating in the thickness direction of the housing bottom wall 9 instead of the recess 25 of the embodiment of FIG. The through hole 31 has a diameter corresponding to the positioning protrusion 21. Therefore, even with such a configuration, the terminals 13 and 14 which are insert-molded in the connector 7 can be smoothly inserted into the corresponding through holes 29 and 30 formed in the circuit board 10, respectively, and a stable seal can be obtained. Sex is made.

  In each of the embodiments described above, the example using the two positioning protrusions 21 and 21 is disclosed, but three or more positioning protrusions may be used.

2 ... Controller 3 ... Controller housing 4 ... Cover 7 ... Connector 10 ... Circuit board 13 ... Upper terminal 14 ... Lower terminal 18 ... Mounting portion 19 ... Groove 20 ... Positioning portion 21 ... Positioning projection 23 ... Mounting protrusion 25 ... Recess 28 ... Adhesive 31 ... Through hole

Claims (4)

A connector made of synthetic resin,
A housing having an opening to which the connector is attached;
A circuit board housed in the housing;
A plurality of terminals, one end of which is insert-molded in the connector, and fixed to the circuit board through the opening,
In an electronic circuit device in which the connector is attached to the opening through an adhesive,
The connector is an electronic circuit device having a positioning protrusion that engages with a recess or a through hole formed in a housing at a position away from the adhesive.   The electronic circuit device according to claim 1, wherein the connector has at least two positioning protrusions.   3. The electronic circuit according to claim 1, wherein the positioning protrusion extends in parallel with the plurality of terminals, and the position of the connector relative to the housing is positioned in a direction orthogonal to the terminals. apparatus.   The connector has a groove, the housing has a mounting protrusion to be inserted into the groove, and the adhesive has a predetermined gap between the groove and the mounting protrusion. The electronic circuit device according to claim 1, wherein the electronic circuit device is applied to the gap.

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