JP5668674B2 - Electronic equipment - Google Patents

Description

  The present invention relates to an electronic device in which a circuit board and a part of a connector mounted on the circuit board are accommodated in an internal space of a housing, and the internal space is made a waterproof space by a sealing material.

  Conventionally, as an electronic device in which a part of a connector mounted on a circuit board and a circuit board is accommodated in an internal space of a housing and the internal space is made a waterproof space by a sealing material, for example, one disclosed in Patent Document 1 is disclosed. Are known.

  In Patent Document 1, a case having a mounting part (board fixing part) on which a circuit board is mounted and a cover arranged on the connector arrangement surface side of the circuit board are arranged on the back side of the circuit board connector arrangement surface. A housing is configured. Further, positioning pins are provided in the case, and positioning holes into which the positioning pins are inserted are formed in the circuit board.

JP 2010-57345 A

  In Patent Document 1, with the connector mounted on the circuit board, the positioning pin of the case is inserted into the positioning hole of the circuit board, so that the position of the connector with respect to the case is perpendicular to the thickness direction of the circuit board. It is determined. Thus, since the position of the connector with respect to the case is determined via the circuit board, the positional variation tolerance between the case and the connector is the same as the positional variation tolerance between the case and the circuit board. And the tolerance of positional variation. Therefore, even if the connector is greatly displaced with respect to the case (housing), for example, the width of the seal groove provided in the case must be widened and the amount of the sealant applied must be increased so as to come into contact with the sealant. Don't be.

  On the other hand, a structure in which a positioning hole is provided in the connector and the positioning pin of the case is inserted into the positioning hole can be considered. In this case, since the position of the connector with respect to the case is determined directly without going through the circuit board, the tolerance of positional variation between the case and the connector can be made smaller than the configuration shown in Patent Document 1. it can. However, since the position of the circuit board with respect to the case is determined via the connector, the tolerance of the positional variation between the case and the circuit board is equal to the tolerance of the positional variation between the case and the connector. It is the sum of the tolerances of positional variations. Therefore, even if the circuit board is largely deviated from the case (housing), the mounting prohibited area on the circuit board must be large so that the case does not come into contact with the electronic components of the circuit board.

  In view of the above problems, an object of the present invention is to provide an electronic device capable of assembling both a circuit board and a connector with high positional accuracy to a case.

In order to achieve the above object, the invention described in claim 1
An insulating base material on which wiring is formed, and an electronic component mounted on the insulating base material, and a circuit board in which a circuit is configured by the electronic component and wiring;
A housing made of an insulating material, and a plurality of terminals that are held in the housing and electrically relay a circuit and an external device, and are mounted on a circuit board;
A case that is divided in the thickness direction of the insulating base material and that is disposed on the back side of the connector placement surface of the circuit board and has a mounting portion on which the circuit board is mounted; and a cover that is placed on the connector placement surface side of the circuit board; A housing that exposes a portion of the connector to the outside through a connector opening formed in a state where the case and the cover are assembled, and accommodates the remaining portion of the connector and the circuit board in the internal space. When,
Sealing material interposed between the facing portion of the peripheral portion of the case and the peripheral portion of the cover, between the peripheral portion of the case and the facing portion of the housing, and between the peripheral portion of the cover and the facing portion of the housing, respectively. Prepared,
An electronic device in which the internal space of the housing is made waterproof by a sealing material,
The connector has at least one positioning protrusion extending along the thickness direction,
The circuit board has a through hole through which the positioning protrusion is inserted,
The case has a hole into which the positioning protrusion is inserted,
The positioning protrusion is inserted into the hole of the case through the through hole of the circuit board ,
The case has a groove part in which the sealing material is disposed,
The connector has a protrusion for sealing that comes into contact with the sealing material arranged in the groove at a portion facing the groove in the case.
The seal material is disposed in the groove portion while being disposed above the hole portion of the case and the opening surface of the groove portion, and the positioning protrusion is inserted into the through hole of the circuit board, so that the surface of the circuit board and the mounting portion of the case The distance between the positioning projection and the opening of the hole in the case is the maximum tolerance of the sealing material in the groove of the case, with the circuit board and the connector and the case spaced apart from each other. The positioning projection, the sealing projection, the hole, and the groove are formed so as to be shorter than the facing distance between the sealing material and the sealing projection in the arranged state .

  In the present invention, since the positioning projection provided on the connector is inserted into the hole of the case, the connector can be arranged with high positional accuracy with respect to the case. Further, the positioning protrusion is inserted into the hole through the through hole of the circuit board. That is, the position reference of the case and the circuit board with respect to the connector is the same. Therefore, the circuit board can be arranged with high positional accuracy with respect to the case.

  Thus, according to the present invention, both the circuit board and the connector can be assembled to the case with high positional accuracy. For this reason, compared with the structure which inserts the positioning pin of a case in the positioning hole of the conventional circuit board, for example, the width | variety of the seal groove provided in a case can be made narrow and the application quantity of a sealing material can also be decreased. Further, the mounting prohibition region on the circuit board can be reduced as compared with the configuration in which the connector is provided with a positioning hole and the positioning pin of the case is inserted into the positioning hole.

Further, when the circuit board on which the connector is mounted is positioned and placed on the case, the positioning projection is inserted into the hole before the sealing projection comes into contact with the sealing material in the groove. Therefore, the sealing protrusion squeezes the sealing material, the sealing material protrudes from the groove, and the sealing material is locally reduced, resulting in poor airtightness. Can be suppressed.

As described in claim 2 , the connector may have a plurality of positioning protrusions. According to this, it is possible to suppress displacement in the rotational direction around the positioning protrusion.

As claimed in claim 3 ,
The plurality of terminals are arranged in one direction perpendicular to the thickness direction, and the arrangement direction of the terminals is the longitudinal direction of the connector,
Positioning protrusions may be provided at both longitudinal ends of the connector.

  According to this, the positional deviation in the rotation direction can be further reduced.

As claimed in claim 4 ,
The positioning projection has a cross-sectional profile perpendicular to the thickness direction and has a corner shape or an elliptical shape,
The through hole and the hole may have a hole shape corresponding to the cross-sectional shape of the positioning protrusion.

  According to this, it is possible to suppress the positional deviation in the rotational direction as compared with the configuration in which the cross-sectional shape of the positioning projection is a perfect circle.

As claimed in claim 5 ,
The plurality of terminals are arranged in one direction perpendicular to the thickness direction, and the arrangement direction of the terminals is the longitudinal direction of the connector,
The housing has a plurality of port portions that are exposed to the outside of the housing from the connector opening as a connection port with an external device, arranged in the longitudinal direction, and the terminals are exposed in each port,
The positioning protrusion is a portion located in the internal space of the housing in the connector, and may be provided in a portion between the port portions in the longitudinal direction.

  For example, when the positioning projection is provided only in the portion between the port portions, the size of the connector can be reduced in the longitudinal direction.

It is the top view seen from the cover side which shows schematic structure of the electronic controller which concerns on 1st Embodiment. It is the perspective view which decomposed | disassembled the case and the cover in the electronic control unit. It is the perspective view which decomposed | disassembled the circuit board and case where the connector was mounted in the electronic control unit. It is the perspective view which decomposed | disassembled the connector, the circuit board, and the case in an electronic control unit. It is a side view top view of the circuit board with which the connector was mounted. It is the top view which looked at the circuit board with which the connector was mounted from the back surface side of the connector arrangement | positioning surface. It is a top view of a case. It is a top view which shows the state which fixed the circuit board with which the connector was mounted to the case. It is sectional drawing which follows the IX-IX line of FIG. It is sectional drawing which follows the XX line of FIG. It is sectional drawing at the time of positioning the circuit board with which the connector was mounted in a case, and respond | corresponds to FIG. It is the perspective view which decomposed | disassembled the connector, the circuit board, and the case in the electronic control apparatus which concerns on 2nd Embodiment. It is a top view of a case. It is sectional drawing which follows the XIV-XIV line | wire of FIG. 13 of the state which fixed the circuit board with which the connector was mounted to the case.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings shown below, common or related elements are given the same reference numerals.

(First embodiment)
In the present embodiment, an example of an electronic control device having a waterproof structure used as an engine ECU (Electric Control Unit) of a vehicle is shown as the electronic device.

  In the present embodiment, the thickness direction of the circuit board is simply referred to as a thickness direction, and a direction perpendicular to the thickness direction is simply referred to as a vertical direction.

  As shown in FIGS. 1 to 4, the electronic control device 10 includes a circuit board 11 on which an electronic component 21 is mounted on an insulating base material 20, a connector 12 mounted on the circuit board 11, and one connector 12. And a housing 13 for accommodating the circuit board 11 and a sealing material 14 for hermetically sealing the internal space of the housing 13. First, general components of the electronic control device 10 will be described with reference to FIGS.

  The circuit board 11 is made of an electrically insulating material such as resin, and has an insulating base 20 on which wiring including lands is formed, and electronic components such as a microcomputer, a power transistor, a resistor, and a capacitor mounted on the insulating base 20 21. The wiring and the electronic component 21 constitute a circuit. In the present embodiment, the electronic component 21 includes a heating element such as a power MOSFET that generates a particularly large amount of heat. For example, as shown in FIG. 5, the electronic component 21 is mounted on both the one surface 11a of the circuit board 11 and the back surface 11b opposite to the one surface 11a, and the heating element is mounted on the back surface 11b. The circuit board 11 has a through hole 22 formed corresponding to the terminal 31 of the connector 12, and a land (not shown) is formed on the wall surface of the through hole 22. In the present embodiment, as shown in FIG. 6, the circuit board 11 (insulating base material 20) has a substantially convex outer contour on a plane along the vertical direction, and the protruding portion of the circuit board 11 (insulating base material 20) is the connector 12. This is the arrangement area. In addition, through holes 23 for fixing the circuit board 11 to the case 40 are formed at the four corners of the substantially rectangular portion excluding the region where the connector 12 is disposed in the insulating base 20.

  On such a circuit board 11, a connector 12 that electrically relays a circuit configured on the circuit board 11 and an external device is mounted. The connector 12 is mainly disposed on the one surface 11 a of the circuit board 11.

  The connector 12 includes a housing 30 made of an electrically insulating material, and a plurality of terminals 31 that are held by the housing 30 and substantially relay a circuit and an external device. The plurality of terminals 31 are arranged in multiple stages in the thickness direction with respect to the housing 30 and are arranged along one direction parallel to the vertical direction. The arrangement direction of the terminals 31 is the longitudinal direction of the connector 12 (housing 30). One end of the terminal 31 protrudes from the housing 30 and is electrically connected to a corresponding land of the circuit board 11, and the other end is exposed to the outside from the connector opening 45 of the housing 13. The portion 32 is exposed. In the present embodiment, the terminal 31 is inserted into the through hole 22 of the circuit board 11 and soldered to a land formed on the wall surface of the through hole 22. However, the mounting structure of the terminal 31 is not limited to such an insertion mounting structure, and a surface mounting structure can also be adopted.

  The housing 30 has a protrusion 33 at a portion facing the case 40 and a groove 34 at a portion facing the cover 41 as a portion that forms a seal structure described later. The projection 33 and the groove 34 are connected to each other, and are provided in an annular shape along a portion of the housing 30 facing the housing 13, that is, the connector opening 45. The protrusion 33 corresponds to the seal protrusion described in the claims. Further, reference numeral 35 shown in FIG. 4 is a tie bar (alignment plate) for aligning the plurality of terminals 31.

  The housing 13 is made of a metal material such as aluminum or iron, or a resin material, and accommodates a part of the connector 12 or the circuit board 11 therein to protect them. As shown in FIG. 2, the housing 13 includes two members divided in the thickness direction. Specifically, it consists of two members, a box-like case 40 having a shallow bottom with one surface (top surface) opened, and a cover 41 that closes the opening of the case 40. The case 40 is a member to which the circuit board 11 is fixed (assembled). Then, the case 40 and the cover 41 are assembled by the screw 42 to constitute a housing 13 that houses a part of the connector 12 and the circuit board 11. In this embodiment, the case 40 is formed using an aluminum-based material, and the cover 41 is formed using an iron-based material.

  The peripheral portions 43 and 44 of the case 40 and the cover 41 are partially opposed to each other, and the remaining portions are opposed to the housing 30 of the connector 12. As described above, a connector opening 45 for exposing a part of the connector 12 to the outside is formed at a portion of the peripheral portions 43 and 44 of the case 40 and the cover 41 facing the housing 30 of the connector 12. Yes.

  In the peripheral portion 43 of the case 40, a groove portion 46 for arranging the sealing material 14 is formed in an annular shape so as to surround the internal space as a portion for forming a seal structure. As shown in FIG. 2 to FIG. 4 and FIG. 7, a hole 47 into which the screw 42 is inserted when the cover 41 is assembled to the case 40 is formed in the outer peripheral portion (outer peripheral portion) of the peripheral edge 43. A protrusion 48 serving as a position reference when the cover 41 is assembled to the case 40 is formed. In addition, a storage groove portion 49 is provided between the hole portion 47 and the groove portion 46 in an arc shape for suppressing the sealing material 14 protruding from the groove portion 46 from flowing into the hole portion 47. Further, the peripheral portion 43 has a flange portion 50 that does not face the cover 41, and the flange portion 50 is provided with a hole portion 51 for attaching the electronic control device 10 to the vehicle. In addition, the storage groove part 49 shows only FIG.7 and FIG.8 which show the top view of case 40 for convenience.

  As shown in FIG. 7, a mounting portion 52 that protrudes from the inner surface for placing the circuit board 11 is just inside the groove portion 46, as shown in FIG. 7. Are provided at four locations while being separated from each other. The mounting portion 52 has a flat surface facing the circuit board 11 so that the circuit board 11 can be supported by the surface. Each mounting portion 52 is provided with a hole 53 for fixing the circuit board 11 to the case 40, and a screw 54 is inserted into the hole 53 through the through hole 23 of the circuit board 11. It is fixed to the case 40. In addition, a pedestal 55 that protrudes from the inner surface is provided at a portion facing the electronic component 21 (heating element) mounted on the back surface 11b of the circuit board 11, and through a heat radiating member (not shown) such as a gel, Heat can be radiated from the electronic component 21 to the pedestal 55 (case 40). Moreover, the base part 56 which protrudes from an inner surface is provided also in the other site | part of an inner surface so that heat can be radiated from the circuit board 11 to the base part 56 (case 40) via heat dissipation members (not shown) such as gel. It has become. In the present embodiment, the pedestal portion 56 is provided at a position overlapping the electronic component 21 mounted on the one surface 11 a of the circuit board 11, and the heat of the electronic component 21 constitutes the circuit board 11. It is transmitted to the pedestal portion 56 through the insulating base material 20 to be performed.

  On the other hand, the peripheral portion 44 of the cover 41 is formed with a protruding portion (not shown) that protrudes in contact with the sealing material 14 as a portion that forms a sealing structure. Further, as shown in FIG. 2, a through hole 57 into which a screw 42 is inserted when the cover 41 is assembled to the case 40, and a protrusion of the case 40 are provided on the outer peripheral portion of the peripheral edge portion 44 of the cover 41. A positioning through hole 58 into which the portion 48 is inserted is formed.

  The sealing material 14 functions to prevent the water from entering the internal space by sealing the internal space of the housing 13 in an airtight manner, for example, with respect to the engine room. As shown in FIG. 2, the sealing material 14 is disposed between the opposing portions of the peripheral edge 43 of the case 40 and the peripheral edge 44 of the cover 41. Further, the connector 12 is also disposed between opposing portions of the housing 30 and the housing 13 (the case 40 and the cover 41). Specifically, the sealing material 14 is disposed in the groove portion 34 of the housing 30 and the groove portion 46 of the case 40 constituting the connector 12. Then, the protruding portion of the cover 41 is placed in contact with the sealing material 14 arranged in the groove portion 34, and the protruding portion of the cover 41 and the protruding portion 33 of the housing 30 are arranged in contact with the sealing material 14 arranged in the groove portion 46. Yes. As such a sealing material 14, for example, a silicon-based moisture curable adhesive can be used.

  Next, details and effects of the positioning structure of the circuit board 11, the connector 12, and the case 40, which are characteristic parts of the electronic control device 10 according to the present embodiment, will be described.

  As shown in FIGS. 3 to 6, 9, and 10, the connector 12 has at least one protrusion 60 extending along the thickness direction. The protrusion 60 corresponds to the positioning protrusion described in the claims. In the present embodiment, the protrusion 60 is integrally formed as a part of the housing 30 at a portion of the housing 30 facing the one surface 11 a of the circuit board 11. The contour shape of the cross section in the vertical direction is a perfect circle. Further, the projecting portions 60 are provided at both ends in the longitudinal direction of the connector 12, more specifically, at portions outside the holding region of the terminals 31 in the housing 30 in the longitudinal direction. That is, the two protrusions 60 are provided so as to sandwich the plurality of terminals 31.

  Corresponding to this protrusion 60, the circuit board 11 has a through hole 61 through which the protrusion 60 is inserted, and the case 40 has a hole 62 in which the protrusion 60 is inserted in the mounting part 52. ing. 9 and 10, the protrusion 60 is inserted into the hole 62 of the case 40 through the through hole 61 of the circuit board 11, whereby the circuit board 11, the connector 12, The relative position of case 40 has been determined. Two through holes 61 and two hole parts 62 are also provided corresponding to the protrusions 60. The opening shape of one through hole 61 and the hole portion 62 is a perfect circle shape, and the opening shape of the other through hole 61 and the hole portion 62 is an oval shape that is long in the longitudinal direction of the connector 12. This is because the oval through hole 61 and the hole 62 absorb the positional deviation within the allowable tolerance with reference to the perfect circular through hole 61 and the hole 62. However, both the through holes 61 and the hole portions 62 may have the same shape (for example, a perfect circle shape).

  Thus, in this embodiment, since the projection part 60 of the connector 12 is inserted in the hole 62 of the case 40, the connector 12 can be arrange | positioned with respect to the case 40 with a sufficient positional accuracy in the perpendicular direction. Further, the protrusion 60 is inserted into the hole 62 through the through hole 61 of the circuit board 11. That is, the position reference of the case 40 and the circuit board 11 with respect to the connector 12 is the same (common). Therefore, the circuit board 11 can also be arranged with high positional accuracy with respect to the case 40. Thus, according to this embodiment, both the circuit board 11 and the connector 12 can be assembled to the case 40 with high positional accuracy.

  For example, consider a conventional configuration in which a case and a circuit board are positioned by inserting a positioning pin of the case into a positioning hole of a circuit board on which a connector is mounted. In this configuration, if the tolerance for positional deviation between the circuit board and the case is 1 mm or less and the tolerance for positional deviation between the circuit board and the connector is 1 mm or less, the tolerance for positional deviation between the case and the connector is 2 mm or less. . Therefore, the amount of displacement of the connector with respect to the case is large, and in order to ensure the sealing performance, for example, it is necessary to widen the width of the groove for sealing provided in the case and to increase the coating amount of the sealing material. . On the other hand, according to the present embodiment, the position reference of the case 40 and the circuit board 11 with respect to the connector 12 is the same (common), so that the tolerance of positional deviation between the case 40 and the connector 12 is approximately 1 mm. It becomes as follows. Accordingly, the width of the sealing groove 46 provided in the case 40 can be narrowed and the application amount of the sealing material 14 can be reduced as compared with the conventional case.

  Further, a conventional configuration is considered in which a positioning hole is provided at a position where the connector does not overlap with the circuit board, and a positioning pin of the case is inserted into the positioning hole, thereby positioning the case and the connector. In this configuration, if the tolerance for positional deviation between the connector and the case is 1 mm or less and the tolerance for positional deviation between the circuit board and the connector is 1 mm or less, the tolerance for positional deviation between the case and the circuit board is 2 mm or less. . Therefore, for example, the distance between the fixing part of the case and the circuit board and the mounting position of the electronic component is long so that the electronic component does not contact the case even if the positional deviation occurs. I had to. That is, it is necessary to increase the mounting prohibited area in the circuit board 11. On the other hand, according to the present embodiment, since the tolerance for positional deviation between the case 40 and the circuit board 11 is approximately 1 mm or less, the mounting prohibited area on the circuit board 11 can be reduced as compared with the conventional case. .

  In the present embodiment, a plurality of positioning means each including the protrusion 60, the through hole 61, and the hole 62 are provided. Therefore, it is possible to suppress positional deviation in the rotational direction around the protrusion 60 as compared with a configuration having only one set of positioning means. In particular, in the present embodiment, misalignment in the rotational direction can be suppressed while adopting the protrusion 60 having a perfect cross-sectional profile. Furthermore, the protrusion part 60 is provided in the longitudinal direction both ends of the connector 12, respectively, and the distance between protrusion parts is long. For this reason, compared with the structure by which the some protrusion part 60 is arrange | positioned closely, the positional offset amount of a rotation direction can be reduced more.

  By the way, the electronic control unit 10 is formed by the following procedure. First, the connector 12 is inserted and mounted on the circuit board 11 by a local flow in a state where the protruding portion 60 of the connector 12 is inserted through the through hole 61 of the circuit board 11. Next, the sealing material 14 is applied to the sealing portion of the groove portion 46 of the case 40 with the connector 12, and the circuit board 11 and the connector 12 are positioned and placed on the case 40 by the positioning means described above. Then, the circuit board 11 is fixed to the case 40 by the screw 54. Next, the sealing material 14 is applied to the sealing portion with the cover 41 and the groove portion 34 of the connector 12 in the groove portion 46 of the case 40, and the cover 41 is positioned on the case 40 while being positioned by the protruding portion 48 and the through hole 58. It can be obtained by arranging and fixing with screws 42.

  In the present embodiment, when the circuit board 11 and the connector 12 are positioned and placed on the case 40, the sealing material 14 disposed in the groove 46 of the case 40 is sealed so that the protruding portion 33 of the connector 12 does not wrinkle. The projection 33 and the groove 46, and the positioning projection 60 and the hole 62 are formed. Specifically, in the thickness direction, the protruding height from the back surface 11 b of the circuit board 11 is higher in the positioning protrusion 60 than in the sealing protrusion 33. In addition, the circuit board 11 and the connector 12 are separated from the case 40 so that the back surface 11b of the circuit board 11 and the front surface (mounting surface) of the mounting portion 52 of the case 40 are parallel to each other. In this state, the seal material 14 is disposed within the groove 46 of the case 40 with the maximum tolerance (maximum allowable coating amount) between the protrusion 60 of the connector 12 and the opening surface of the hole 62 in the case 40. It is formed so as to be shorter than the facing distance between the sealing member 14 and the projection 33 of the connector 12 in the state where the connector is in contact. Therefore, when the circuit board 11 on which the connector 12 is mounted is positioned and placed on the case 40, before the sealing projection 33 contacts the sealing material 14 in the groove 46, as shown in FIG. The protrusion 60 is inserted into the hole 62. Therefore, the protrusion 33 squeezes the sealing material 14 and the sealing material 14 protrudes from the groove 46, and the sealing material 14 is locally reduced to cause an airtight defect. It is possible to suppress the occurrence of a problem that it is likely to occur.

  Next, effects of other parts will be described.

  By the way, the application amount of the sealing material 14 is an important parameter for the waterproof performance of the internal space of the housing 13. If the coating amount is small, the waterproof property may not be secured. On the other hand, if the coating amount is large, the water does not fit in the groove portion 46 and may protrude and enter the screw seat surface or the hole portion 47 adjacent to the groove portion 46. When fastening is performed in a state where the sealing material 14 reaches the screw seat surface or the hole 47, the fastening force cannot be guaranteed due to the resistance of the sealing material 14. On the other hand, in this embodiment, the storage groove portion for suppressing the sealing material 14 protruding from the groove portion 46 from flowing into the hole portion 47 between the hole portion 47 and the groove portion 46 in the peripheral edge portion 43 of the case 40. 49 is provided. For this reason, even if the sealing material 14 protrudes from the groove 46, the sealing material 14 is stored in the storage groove 49, thereby preventing the sealing material 14 from entering the screw seat surface or the hole 47. it can. In addition, by increasing the distance between the groove 46 and the hole 47, the case 40 in the vertical direction, and thus the physique of the electronic control device 10, can be compared with a configuration in which the groove 46 and the hole 47 are prevented from entering. Can be miniaturized.

(Second Embodiment)
In the present embodiment, description of parts common to the electronic control device 10 shown in the above embodiment is omitted. In the first embodiment, an example in which the protrusions 60 having a perfect circular cross section are provided at both ends in the longitudinal direction of the connector 12 has been described.

  On the other hand, in this embodiment, as shown by the shape of the hole 62 in FIG. 13, the contour shape of the cross section in the vertical direction of the protrusion 60 is a semicircular shape (kamaboko shape). Then, as shown in FIGS. 12 and 14, one protrusion 60 having such a shape is a portion located in the internal space of the housing 13 in the connector 12, and has two port portions 32 in the longitudinal direction. It is provided in the part between. The through hole 61 and the hole 62 also have a similar opening shape corresponding to the cross-sectional shape of the protrusion 60, that is, a semicircular shape.

  As described above, when the projecting portion 60 having a semicircular cross section and the opening-shaped through hole 61 and hole portion 62 corresponding to the projecting portion 60 are employed, the cross section of the projecting portion 60 has a perfect circular shape. Thus, the positional deviation in the rotation direction can be suppressed. In addition, as a cross-sectional shape which has such an effect, it is not limited to the said semicircular shape, The shape which has a corner | angular part, in other words, the shape which has a linear part as an external outline can be employ | adopted. In addition, an elliptical shape can also be adopted.

  In addition, since the protrusion 60 having a shape that can suppress the displacement in the rotation direction is employed, the displacement in the rotation direction can be suppressed even though the protrusion 60 is one. In particular, in the present embodiment, the protrusion 60 is a portion located in the internal space of the housing 13 in the connector 12 and is provided in a portion between the two port portions 32 in the longitudinal direction. Compared with the configuration in which the protrusion 60 is provided at the end portion, that is, the portion outside the holding region of the terminal 31 in the housing 30, the size of the connector 12 in the longitudinal direction can be reduced.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In 1st Embodiment, the example which makes the cross-sectional shape of the protrusion part 60 a perfect circle shape was shown. However, as shown in the second embodiment, a shape having a corner or an elliptical shape may be employed.

  In the first embodiment, the protrusions 60 are provided at both ends in the longitudinal direction of the connector 12, respectively, and in the second embodiment, the protrusions 60 are provided corresponding to the portions between the two port portions 32. It was. However, the arrangement shown in the first embodiment and the arrangement shown in the second embodiment may be combined.

  In the present embodiment, an example in which the arc-shaped storage groove portion 49 is provided between the sealing groove portion 46 and the hole portion 47 and in the opposite portion of the both 46 and 47 is shown. However, the shape and arrangement of the storage groove 49 are not limited to the above example. For example, the linear storage groove 49 may be used. Moreover, it is good also as the annular storage groove part 49 so that the groove part 46 may be surrounded. Furthermore, multiple storage grooves 49 may be provided between the grooves 46 and the holes 47.

DESCRIPTION OF SYMBOLS 10 ... Electronic device 11 ... Circuit board 12 ... Connector 13 ... Case 14 ... Sealing material 30 ... Housing 33 ... Projection (seal projection)
40 ... Case 41 ... Covers 43, 44 ... Rim 52 ... Mounting part 60 ... Protrusion (positioning protrusion)
61 ... through hole 62 ... hole

Claims (5)

An insulating base material on which wiring is formed, and an electronic component mounted on the insulating base material, and a circuit board in which a circuit is configured by the electronic component and the wiring;
A housing made of an insulating material, and a plurality of terminals held in the housing and electrically relaying the circuit and an external device, and a connector mounted on the circuit board;
A case having a mounting portion that is divided in the thickness direction of the insulating base material and is arranged on the back side of the connector arrangement surface of the circuit board and on which the circuit board is mounted, and arranged on the connector arrangement surface side of the circuit board A portion of the connector is exposed to the outside through a connector opening formed in a state where the case and the cover are assembled, and the remaining portion of the connector and the circuit board A housing that accommodates the internal space,
It is interposed between the facing part of the peripheral part of the case and the peripheral part of the cover, between the opposing part of the peripheral part of the case and the housing, and between the opposing part of the peripheral part of the cover and the housing, respectively. A sealing material,
An electronic device in which the internal space of the housing is a waterproof space by the sealing material,
The connector has at least one positioning protrusion extending along the thickness direction,
The circuit board has a through hole through which the positioning protrusion is inserted;
The case has a hole into which the positioning protrusion is inserted,
The positioning protrusion is inserted into the hole of the case through the through hole of the circuit board ,
The case has a groove part in which the sealing material is disposed,
The connector has a projecting part for sealing in contact with the sealing material disposed in the groove part at a portion facing the groove part in the case.
The sealing material is disposed in the groove portion while being disposed up to above the hole portion and the opening surface of the groove portion in the case, and the positioning protrusion is inserted into the through hole of the circuit board. With the circuit board, the connector, and the case spaced apart so that the substrate and the surface of the mounting portion of the case are parallel to each other, the positioning protrusion and the opening surface of the hole in the case The positioning protrusion and the seal are arranged such that the distance is shorter than the facing distance between the seal member and the seal protrusion in a state where the seal member is disposed within the groove of the case with a maximum tolerance. An electronic device comprising: a protrusion for use, the hole, and the groove . The electronic device according to claim 1 , wherein the connector includes a plurality of the positioning protrusions. The plurality of terminals are arranged in one direction perpendicular to the thickness direction, and the arrangement direction of the terminals is the longitudinal direction of the connector,
The electronic device according to claim 2 , wherein the positioning protrusions are provided at both longitudinal ends of the connector. In the positioning projection, the contour shape of the cross section perpendicular to the thickness direction is a shape having a corner or an ellipse,
The electronic device according to claim 1, wherein the through-hole and the hole have a hole shape corresponding to a cross-sectional shape of the positioning protrusion. The plurality of terminals are arranged in one direction perpendicular to the thickness direction, and the arrangement direction of the terminals is the longitudinal direction of the connector,
The housing has a plurality of port portions that are exposed to the outside of the housing from the connector opening as a connection port with the external device, arranged in the longitudinal direction, and the terminal is in each port. Exposed
The positioning protrusion is a portion positioned in the inner space of the housing in the connector, any claim 1 to 4, characterized in that provided in the longitudinal direction in the portion between said ports The electronic device according to claim 1 .

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