JP2019121618A - Electronic circuit device and electronic circuit device with car body side bracket - Google Patents

Abstract

To provide an electronic circuit device improving assemblability of a support piece to a bracket holding part.SOLUTION: An electronic circuit device includes a circuit board, and an exterior member receiving this circuit board. The exterior member includes a pair of first arm parts 10, and the pair of first arm parts 10 have support faces 21 facing each other so as to hold a pair of side edges 13b of the support piece 13 of a car body side bracket from both sides. In the support face 21, two grooves 22 extending in the press-fit direction of the support piece 13, and having a groove width Wg smaller than the thickness T of the support piece 13 are provided. Two grooves 22 and two protrusions 23 are placed alternately in the thickness direction of the support piece 13. A flat end face 21a at the tip of the protrusion 23 becomes a face in contact with the side edge of the support piece 13, and the width We of the end face 21a is smaller than the thickness T of the support piece 13.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an electronic circuit device and an electronic circuit device with a vehicle body side bracket.

  As an electronic circuit device, for example, an electronic circuit device described in Patent Document 1 below is known.

  In the electronic circuit device described in Patent Document 1, a bracket holding portion for holding a plate-like support piece of a metal car body side bracket is formed on the side surface of a resin-made exterior member for housing a circuit board. The bracket holding portion has a pair of arms having support surfaces facing each other, and the two support surfaces have a plurality of protrusions facing each other. And a supporting piece pressed in between these support surfaces crushes a tip of a projection one by one, and a pair of side edges of a supporting piece are pinched by a crushed projection which counters mutually.

JP 2008-177229 A

  In the electronic circuit device of Patent Document 1, when the support pieces pass through the mutually facing protrusions when the support pieces are press-fitted to the pair of support surfaces, a gap remains between the side edge of the support pieces and the support surface. ing. Then, due to this gap, rattling of the support piece in the width direction occurs, and there is a possibility that the assemblability of the support piece to the support surface may be deteriorated.

  SUMMARY OF THE INVENTION The present invention has been made in view of the conventional circumstances, and an object thereof is to provide an electronic circuit device and an electronic circuit device with a vehicle body side bracket that improve the assemblability of a support piece to a bracket holding portion. .

  In the present invention, at least one of the support surfaces of the bracket holding portion has a step shape so that part of the thickness of the side edge of the support piece is in contact when viewed in a cross section orthogonal to the press-fitting direction of the support piece.

  According to the present invention, the assemblability of the support piece to the bracket holding portion is improved.

FIG. 6 is a perspective view showing the electronic circuit device and the vehicle body side bracket of the first embodiment before press-fitting of the vehicle body side bracket. FIG. 6 is a perspective view showing the electronic circuit device and the vehicle body side bracket of the first embodiment after press-fitting of the vehicle body side bracket. It is a perspective view of the 1st arm of a bracket attaching part, a 2nd arm, etc. when it sees from the closure member side. It is sectional drawing of the vehicle body side bracket and 1st arm part which were cut | disconnected along line AA of FIG. It is a perspective view of a position control part etc. when it sees from the 1st arm side. It is explanatory drawing of the vehicle body side bracket of 1st Example when it sees from the 2nd arm part side. It is sectional drawing of the vehicle body side bracket cut | disconnected along line B-B of FIG. 2, and a bracket holding part. It is explanatory drawing of the vehicle body side bracket of 2nd Example when it sees from the 2nd arm part side. It is explanatory drawing of the vehicle body side bracket of 3rd Example when it sees from the 2nd arm part side. It is the side edge of the support piece of the vehicle body side bracket of 4th Example, and an enlarged view of the periphery. It is explanatory drawing of the vehicle body side bracket of 5th Example when it sees from the 2nd arm part side.

  Hereinafter, an embodiment of the electronic circuit device of the present invention will be described based on the drawings.

First Embodiment
FIG. 1 is a perspective view showing the electronic circuit device 2 and the vehicle body side bracket 1 of the first embodiment before the vehicle body side bracket 1 is press fitted. FIG. 2 is a first embodiment after the vehicle body side bracket 1 is press fitted. It is a perspective view which shows the electronic circuit apparatus 2 and the vehicle body side bracket 1 of an example.

  The electronic circuit device 2 is configured by closing the exterior member 3 accommodating a circuit board (not shown) on which various electronic components are mounted with a plate-shaped closing member 4. The electronic circuit device 2 is attached to a mounting object, for example, a predetermined position of a vehicle body of an automobile via the vehicle body side bracket 1.

  The exterior member 3 is formed of a synthetic resin material in a rectangular box with a bottomed rectangular shape, and a base wall 5 in the form of a rectangular plate and a surrounding wall erected so as to surround four sides of the base wall 5 in a rectangular shape. And seven. The peripheral wall 7 corresponds to a pair of short side walls 8 corresponding to the short sides of the rectangle (only one short side wall 8 is shown in FIGS. 1 and 2) and the long sides of the rectangle And a pair of long side walls 9 (only one long side wall 9 is shown in FIGS. 1 and 2).

  A bracket holding portion 12 having a pair of first arm portions 10 and a pair of second arm portions 11 is formed on the outer side surface 8 a of each short side wall portion 8. The distance Da between the pair of first arms 10 is slightly smaller than the width Ws of the support piece 13 of the metal body side bracket 1 described later, and the support piece 13 is a part of the two first arm units 10. The vehicle body side bracket 1 is attached to the exterior member 3 by press-fitting along the press-fitting direction P between the two. The “press-in direction P” is a direction from the open end face 3 a of the exterior member 3 toward the base wall 5 as shown in FIGS. 1 and 2.

  Further, the second arm portion 11 restricts the movement of the support piece 13 in the direction opposite to the press-fitting direction P after the press-fitting.

  Two connector insertion holes 14 and 15 adjacent to each other along the long side wall 9 are formed in one long side wall 9 of the two long side walls 9. A connector (not shown) is inserted into the connector insertion holes 14 and 15, respectively.

  The base wall 5, the peripheral wall 7, the first arm 10, the second arm 11, and the connector insertion holes 14 and 15 are integrally formed by, for example, injection molding of a synthetic resin material.

  The vehicle-body-side bracket 1 has an opening 20 punched out in the center of a generally rectangular metal plate, and a pair of support pieces 13 from the inner edge 17a of the short side 17 of the frame 16 which is generally continuous in a rectangular shape. It is formed by bending to the electronic circuit device 2 side. The pair of support pieces 13 oppose each other across the substantially rectangular opening 20 remaining between the two short sides 17 and the two long sides 18, and the inner side surface 13 a of the two support pieces 13 The distance between each other is larger than the distance between the outer side surfaces 8 a of the pair of short side wall portions 8. As shown in FIG. 1, in the vehicle-body-side bracket 1, the support piece 13 is on the same side as the first arm 10 and the second arm 11 of the exterior member 3, and the support piece 13 is the first arm 10 and the second arm. It is disposed in a posture extending toward the arm 11. Then, the pair of side edges 13 b of the support piece 13 is press-fitted between the pair of first arms 10 along the press-fitting direction P.

  In a state where each support piece 13 is press-fitted between two first arm portions 10 as shown in FIG. 2, the vehicle body side bracket 1 is attached to the exterior member 3 at four points by four first arm portions 10. It is attached. In other words, in each short side wall portion 8, the pair of side edges 13 b of the support piece 13 is firmly held by the two first arm portions 10.

  Further, the short side portion 17 is provided with an insertion hole 19 into which a fixing member, for example, a bolt is inserted. The bolt is screwed into a screw hole (not shown) of the vehicle body through the insertion hole 19, whereby the vehicle body side bracket 1 equipped with the electronic circuit device 2 is fixed at a predetermined position of the vehicle body.

  FIG. 3 is a perspective view of the first arm 10, the second arm 11, and the like of the bracket holding portion 12 when viewed from the closing member 4 side. 4 is a cross-sectional view of the support piece 13 and the first arm 10 of the vehicle body side bracket 1 cut along the line A-A of FIG. 2, that is, viewed from a direction orthogonal to the press-fitting direction P of the support piece 13. FIG. 10 is a cross-sectional view of the support piece 13 and the first arm 10 of FIG.

  The first arm portion 10 protrudes from the outer side surface 8a of the short side wall portion 8 to the outside of the exterior member 3 and has a substantially trapezoidal cross section when viewed from the direction orthogonal to the press fitting direction P of the support piece 13 There is. The first arm 10 has a support surface 21 that supports the side edge 13 b of the support piece 13. The support surface 21 is orthogonal to both the outer surface 8a of the short side wall 8 and the base wall 5 (see FIGS. 1 and 2), and as shown in FIG. 4, the thickness of the side edge 13b of the support piece 13 It has a step shape so that a part of T is in contact. That is, by providing the two groove portions 22 extending in the press-fitting direction P of the support piece 13 and having a groove width Wg smaller than the thickness T of the side edge 13b, the two groove portions 22 and the two ridges are provided. The portions 23 are alternately arranged in the thickness direction of the side edge 13b. Here, as shown in FIG. 4, the flat end surface 21 a of the support surface 21 at the tip of the ridge portion 23 is a surface orthogonal to the outer surface 8 a and in contact with the side edge 13 b of the support piece 13. The width We of the end face 21a along the thickness direction of the side edge 13b is smaller than the thickness T of the side edge 13b.

  Further, as shown in FIG. 3, on the base wall 5 (see FIGS. 1 and 2) side of the short side wall portion 8, a plate-like position that regulates the tip position of the support piece 13 press-fit in the press-fit direction P. A restricting portion 24 is formed. The position restricting portion 24 is orthogonal to both the end face 21 a of the projecting portion 23 and the outer side surface 8 a of the short side wall portion 8.

  Furthermore, the top of the first arm 10 is provided with a dropout suppressing portion 25 which suppresses the support piece 13 from being displaced from the first arm 10 in a direction away from the outer side surface 8a of the short side wall 8 . The fall-off suppressing portion 25 has an L-shaped cross section when viewed from the direction orthogonal to the press-in direction P, and has a protrusion height larger than the protrusion height of the protrusion 23 in the same direction as the protrusion 23 It has the tip part 25a which protruded. By the tip end portion 25a, detachment of the support piece 13 from the first arm portion 10 is suppressed.

  The pair of first arm portions 10 configured in this manner is disposed such that the support surfaces 21 face in the direction in which the support surfaces 21 face each other, and the pair of support surfaces 21 is a pair of side edges 13 b of the support piece 13 after press fitting. Hold from both sides.

  Similar to the first arm 10, the second arm 11 is formed on the outer side surface 8a of the short side wall 8, and when viewed in a direction orthogonal to the press-fitting direction P of the support piece 13, the cross section is substantially L-shaped. It has made a letter. The second arm 11 extends parallel to the outer surface 8 a of the short side wall 8 from the support 26 so as to cover the first arm 10 and the support 26 projecting from the outer side surface 8 a of the short side wall 8. An arm extension 27 and a position restricting portion 28 connected to the arm extension 27 are provided.

  The support portion 26 is formed substantially in a plate shape on the back surface 10 a side of the first arm portion 10, and has a projection height greater than the projection height of the first arm portion 10 from the outer side surface 8 a of the short side wall portion 8 It projects in the same direction as the first arm 10. The back surface 26 a of the support portion 26 is connected to the outer side surface 8 a of the short side wall portion 8 by a plate-like reinforcing portion 29 having a triangular cross section when viewed in a direction orthogonal to the press-fitting direction P of the support piece 13. .

  The arm extension 27 has a long plate shape and flexibility, and can approach or be separated from the outer side surface 8a with the tip 26b of the support 26 as a fulcrum. It is configured to be

  The position restricting portion 28 restricts the movement of the support piece 13 in the press-fitting direction P after the press-fitting.

  FIG. 5 is a perspective view of the position restricting portion 28 and the like when viewed from the first arm 10 side.

  The position restricting portion 28 has a hook shape, and is integral with the arm portion expanded portion 27 at a position retracted to the outer side surface 8 a (see FIGS. 1 and 2) of the short side wall portion 8 than the arm portion expanded portion 27. Is formed. The position restricting portion 28 is orthogonal to the surface 30 in contact with the outer side surface 13c (see FIGS. 1 and 2) of the support piece 13 after press fitting and to the surface 30, and is engaged with a later-described engaging portion 41a of the support piece 13. And an inclined surface 32 which is connected to the locking surface 31 and which the support piece 13 contacts at the time of press-fitting.

  The surface 30 is formed in a step-like shape to correspond to the support pieces 13 of the two types of vehicle-body-side brackets 1 having different plate thicknesses, and has a rectangular first surface 30a and a side wall shorter than the first surface 30a. And a second surface 30b retracted to the side of the outer surface 8a (see FIGS. 1 and 2) of the portion 8. For this reason, the distance between the first surface 30a and the outer surface 8a is larger than the distance between the second surface 30b and the outer surface 8a. When the plate thickness of the vehicle body side bracket 1 is relatively large, the outer side surface 13c of the support piece 13 contacts the first surface 30a, while when the plate thickness of the vehicle body side bracket 1 is relatively small, the outer side surface 13c of the support piece 13 Contacts the second surface 30b. The first surface 30 a and the second surface 30 b are connected to the inclined surface 32 via the locking surface 31.

  The inclined surface 32 is inclined with respect to the press-fitting direction P of the support piece 13 so that the thickness of the position restricting portion 28 becomes larger toward the press-fitting direction P of the support piece 13. At a position corresponding to the first surface 30a of the inclined surface 32, in order to adjust the amount of bending of the arm extension 27 in a direction away from the outer surface 8a when press-fitting the support piece 13 having a relatively large thickness. , And a relief surface 33 parallel to the first surface 30a is formed. Therefore, the inclined surface 32 is located at a position corresponding to the first surface 30a, and corresponds to the first inclined surface 32a contacting the support piece 13 and the second surface 30b when the support piece 13 having a relatively large thickness is press-fitted. The second inclined surface 32b is in position and is in contact with the support piece 13 at the time of press-fitting of the support piece 13 having a relatively small plate thickness. The length of the slope of the second slope 32 b is greater than the length of the first slope 32 a extending from the top 28 a of the position restricting portion 28 to the relief surface 33.

  In the position restricting portion 28, when the support piece 13 having a relatively large thickness is pressed into the first arm portion 10, the support piece 13 is pressed into the relief surface 33 while being in contact with the first inclined surface 32a. Move along P. When the support piece 13 is moved, the position restricting portion 28 is pushed by the support piece 13 so that the arm expanded portion 27 connected to the position restricting portion 28 separates from the outer side surface 8 a of the short side wall 8 Flex. Then, after the support piece 13 is further moved along the press-fitting direction P, the locking surface 31 is locked to a locking portion 41a (see FIG. 6) of the support piece 13 described later by so-called snap fit.

  On the other hand, when the support piece 13 having a relatively small thickness is pressed into the first arm 10, the support piece 13 moves along the press-in direction P while being in contact with the second inclined surface 32b. Along with the movement of the support piece 13, the arm portion expanded portion 27 connected to the position restricting portion 28 is bent in the direction away from the outer side surface 8 a of the short side wall portion 8. Then, as in the case of the support piece 13 having a relatively large thickness, the engagement surface 31 engages with a later-described engagement portion 41a (see FIG. 6) of the support piece 13 by a so-called snap fit.

  FIG. 6 is an explanatory view of the vehicle body side bracket 1 of the first embodiment when viewed from the second arm 11 side. 6, the right side of the support piece 13 corresponds to the connector insertion holes 14 and 15 in FIGS. 1 and 2, while the left side of the support piece 13 is on the opposite side to the connector insertion holes 14 and 15. It corresponds.

  The pair of side edges 13 b of the support piece 13 is configured in the same shape, and is formed in a concavo-convex shape that is continuous along the press-fitting direction P of the support piece 13. In other words, the pair of side edges 13b of the support piece 13 are provided with two projecting portions 34 respectively projecting in a semicircular arc outward from the side edge 13b of the support piece 13 so as to be orthogonal to the press-fitting direction P. ing. The protrusion 34 contacts the end face 21 a (see FIG. 4) of the protrusion 23 when the support piece 13 is press-fitted.

  Furthermore, a pair of side edges 13 b of the support piece 13 is a rectangle expanded between the protrusion 34 and the short side 17 in the same direction as the protrusion 34 with a length larger than the protrusion height of the protrusion 34. The extension portion 35 of the The surface 35a on the protrusion 34 side of the expanded portion 35 abuts on the contact surface 10b (see FIG. 3) of the first arm 10 in a state where the support piece 13 is press-fitted to the pair of first arms 10.

  Further, the side edge 13 b of the support piece 13 has a chamfered portion 36 on the tip end side of the support piece 13.

  The connector insertion hole side opening 37 and the non-connector insertion hole side opening 38 having an L shape when viewed in a cross section orthogonal to the press-fitting direction P are provided in the thickness direction of the support piece 13 at the tip end of the support piece 13. Through formation, a generally rectangular tongue 39 is formed. The connector insertion hole side opening 37 is formed larger than the non-connector insertion hole side opening 38. That is, the connector insertion hole side opening 37 has a size that can accommodate a part of the position restricting portion 28 and the prismatic reverse attachment suppressing portion 40 (see FIG. 7), The non-connector insertion hole side opening 38 has a size that can accommodate part of the position restricting portion 28.

  Further, the support piece 13 has a pair of expanded portions 41 expanded toward the tongue portion 39, and the opening edge portion on the short side portion 17 side of the expanded portion 41 is a lock of the position restricting portion 28. The surface 31 is a locking portion 41a to be locked.

  7 is a cross-sectional view of the vehicle body side bracket 1 and the bracket holding portion 12 cut along the line B-B in FIG. That is, FIG. 7 shows the arm expanded portion 27 etc. of the second arm 11 in order to make it easy to see the locked state between the position restricting portion 28 of the second arm 11 and the support 13 after press fitting the support piece 13. Is a cross-sectional view from which the

  In FIG. 7, the surface 35 a of the expanded portion 35 of the support piece 13 abuts on the contact surface 10 b of the first arm portion 10, and the locking surface 31 of the position restricting portion 28 is engaged with the expanded portion 41 of the support piece 13. In a state of being locked to the portion 41a, the support surfaces 21 of the pair of first arm portions 10 sandwich the pair of side edges 13b of the support piece 13 from both sides.

  Furthermore, in the connector insertion hole side opening portion 37, the prismatic reverse attachment suppressing portion 40 formed on the outer side surface 8a of the short side wall portion 8 is between the tongue portion 39 of the support piece 13 and the position restricting portion 28. It is located in The reverse attachment suppressing portion 40 suppresses that the support piece 13 opposed to the support piece 13 shown in FIG. 7 is press-fit between the pair of arm portions 10 shown in FIG. 7. If the support piece 13 opposed to the support piece 13 shown in FIG. 7 is press-fitted, the reverse attachment suppressing portion 40 interferes with the support piece 13 to suppress the press-fit of the support piece 13. There is.

  As described above, in the first embodiment, the support surface 21 of the first arm 10 is formed in a step shape in which the grooves 22 and the ridges 23 are alternately disposed. A part of the thickness T of the side edge 13b of the support piece 13 is in contact with the end face 21a. That is, when the support piece 13 is press-fitted, the side edge 13 b of the support piece 13 is guided in the press-fit direction P while always in contact with the end face 21 a which is long and continuous along the press-fit direction P. Thereby, rattling of the width direction (direction along the width Ws of the support piece 13) of the support piece 13 at the time of press-fitting of the support piece 13 is suppressed, and the side edge 13b of the support piece 13 is press-fit by the end face 21a. It is held firmly over a wide range along the direction P. Therefore, the assemblability of the vehicle body side bracket 1 to the exterior member 3 is improved.

  In addition, a part of the thickness T of the side edge 13b of the support piece 13 is in contact with the end face 21a of the ridge portion 23, so that the entire thickness T of the side edge 13b is in contact with the end face 21a of the ridge portion 23 Thus, the contact area between the end face 21a and the side edge 13b is reduced. Therefore, the friction between the end face 21a and the side edge 13b at the time of press-fitting of the support piece 13 is reduced, and the support piece 13 can be press-fit between the opposing end faces 21a with a small press-fit load. In addition, since the deformation and wear of the protruding portion 23 are suppressed by press-fitting the support piece 13 with a small press-fit load, rattling of the support piece 13 in the width direction after press-fit is alleviated.

  Furthermore, in the first embodiment, the side edge 13b of the support piece 13 has the projection 34, and the projection 34 is in contact with the end face 21a of the projection 23 and between the end faces 21a facing each other. It is pressed in. For this reason, the contact area between the end face 21a of the protruding portion 23 and the side edge 13b of the support piece 13 becomes smaller, and the press-fit load of the support piece 13 on the end face 21a becomes smaller. Therefore, the press-fitting of the support piece 13 can be easily performed.

  Further, in the first embodiment, the position restricting portion 28 of the second arm portion 11 is provided with the locking surface 31 which is locked to the locking portion 41 a of the support piece 13 after the press-fitting. Therefore, the locking of the locking surface 31 to the locking portion 41 a prevents the support piece 13 from coming off in the direction opposite to the press-fitting direction P.

  Furthermore, in the first embodiment, the position restricting portion 28 of the second arm 11 is provided with the first inclined surface 32a and the second inclined surface 32b whose slope is longer than the first inclined surface 32a. . Then, the support piece 13 is press-fitted to the support piece 13 having a relatively large thickness while being in contact with the first inclined surface 32a, while the second support piece 13 is provided for a relatively small thickness. The support piece 13 is press-fitted while being in contact with the inclined surface 32 b. For this reason, it is possible to cope with the press-in and hold of the support pieces 13 of the two types of vehicle-body-side brackets 1 having different plate thicknesses according to requirements such as strength by the single position restricting portion 28. Therefore, the manufacturing cost of the exterior member 3 which equipped the 2nd arm part 11 is reduced. The position of the side edge of the extended portion 41 is different depending on the thickness of the vehicle body side bracket 1.

  Further, in the electronic circuit device of Patent Document 1, since the support surface of the arm of the bracket holding portion has a plurality of projections, when the bracket holding portion is integrally formed with the exterior member, There has been a risk of complication and increase in the number of models.

  However, in the first embodiment, since the support surface 21 of the first arm 10 has the projecting portion 23 having a long and relatively simple shape, the complexity and number of molds are increased. Can be suppressed.

Second Embodiment
FIG. 8 is an explanatory view of the vehicle body side bracket 1 of the second embodiment when viewed from the second arm 11 side.

  In the second embodiment, at the side edge 13 b of the support piece 13 of the vehicle-body-side bracket 1, two recesses 42 aligned along the press-fitting direction P of the support piece 13 are formed. The recess 42 has a semicircular arc shape in a cross section orthogonal to the press-fitting direction P of the support piece 13. As shown in FIG. 8, the flat top 43 remains outside the bottom of the recess 42, and the top 43 and the recess 42 are alternately arranged along the press-fitting direction P of the support piece 13. The top 43 is in contact with the end face 21 a (see FIG. 4) of the ridge 23 of the first arm 10 when the support piece 13 is press-fitted.

  As described above, in the second embodiment, the side edge 13b of the support piece 13 is formed in a concavo-convex shape in which the top 43 and the recess 42 are alternately arranged. For this reason, since the contact area between the end face 21a of the projection 23 and the side edge 13b of the support piece 13 is small, the press-fit load of the support piece 13 on the end face 21a is reduced. Accordingly, also in the second embodiment, the assemblability of the vehicle body side bracket 1 to the exterior member 3 is improved.

Third Embodiment
FIG. 9 is an explanatory view of the vehicle body side bracket 1 of the third embodiment when viewed from the second arm 11 side.

  In the third embodiment, the side edge 13 b of the support piece 13 of the vehicle-body-side bracket 1 is formed in a wave shape (corrugated portion 44) along the press-fitting direction P of the support piece 13.

  Therefore, also in the third embodiment, the contact area between the end face 21a of the projecting portion 23 and the side edge 13b of the support piece 13 is reduced, so the press-fit load of the support piece 13 on the end face 21a is reduced. Thereby, the assemblability of the vehicle body side bracket 1 to the exterior member 3 is improved.

Fourth Embodiment
FIG. 10 is an enlarged view of the side edge 13b of the support piece 13 of the vehicle-body-side bracket 1 of the fourth embodiment and the periphery thereof.

  In the fourth embodiment, the side edge 13b of the support piece 13 of the vehicle-body-side bracket 1 is formed in a concavo-convex shape so that the height difference between the concavities and convexities becomes small along the press-fitting direction P of the support piece 13. Therefore, the clearance between the support surface 21 of the first arm 10 and the side edge 13 b increases along the press-in direction P.

  The side edge 13b is formed with three projecting portions 45, 46, 47 having a circular arc shape when viewed in a cross section orthogonal to the press-fitting direction P of the support piece 13 with different projecting heights from the bottom portion 13d. The protrusion height Ha of the protrusion 45 located on the extension 35 side is larger than the protrusion height Hb of the protrusion 46 adjacent to the press-fitting direction P of the support piece 13, and the protrusion height Hb of the protrusion 46 is The projection height Hc of the projection 47 adjacent to the press-fitting direction P of the support piece 13 is larger.

  As described above, in the fourth embodiment, the clearance between the support surface 21 of the first arm 10 and the side edge 13 b increases along the press-fitting direction P. Therefore, the support piece 13 is press-fit with small pressure input by the small protrusion 47 at the initial stage of press-in in which the press-in direction P tends to vary, and when the press-in direction P becomes stable, large pressure input by the larger protrusions 46 and 45 The support piece 13 can be press-fitted efficiently.

  Further, by press-fitting the support piece 13 as in the fourth embodiment, it is possible to suppress the deformation and wear of the end face 21 a of the protruding portion 23 of the first arm 10 at the initial stage of press-fitting.

Fifth Embodiment
FIG. 11 is an explanatory view of the vehicle body side bracket 1 of the fifth embodiment when viewed from the second arm 11 side.

  In the fifth embodiment, the side edge 13b of the support piece 13 of the vehicle-body-side bracket 1 is formed not in a concavo-convex shape but in a linear shape along the press-fitting direction P of the support piece 13.

  Therefore, the contact area along the press-fitting direction P between the side edge 13b of the support piece 13 and the end face 21a of the protrusion 23 becomes large, and the holding force of the side edge 13b of the support piece 13 by the end face 21a of the protrusion 23 Will increase. As a result, even if the first arm 10 is slightly deformed due to factors such as deterioration with time and temperature, the holding power of the side edge 13 b can be maintained.

  In the first to fourth embodiments, an example is disclosed in which the pair of side edges 13b of the support piece 13 has an uneven shape, but the vehicle body side bracket 1 is configured such that one side edge 13b has an uneven shape. It is good.

  Further, by combining the first to fourth embodiments, a configuration in which the uneven shape of one side edge 13b is different from the uneven shape of the other side edge 13b can be applied to the present invention. .

  As the electronic circuit device based on the embodiment described above, for example, one having the aspect described below can be considered.

  An electronic circuit device comprising: at least one circuit board; and an exterior member accommodating the circuit board, the exterior member including a bracket holding portion into which a support piece of a vehicle body side bracket is press-fitted. In an aspect, the bracket holding portion includes support surfaces facing in directions facing each other so as to sandwich the pair of side edges of the support piece from both sides, and at least one of the support surfaces is a press-fit direction of the support piece When viewed in orthogonal cross sections, a step shape is formed such that part of the thickness of the side edge of the support piece is in contact.

  In a preferred aspect of the electronic circuit device, the side edge of the support piece is formed in a concavo-convex shape which is continuous along the press-fitting direction of the support piece.

  In another preferred aspect, in any of the aspects of the electronic circuit device, the side edge of the support piece is formed in a wave shape.

  In another preferred aspect, in any of the aspects of the electronic circuit device, the clearance between the side edge of the support piece and the support surface is increased along the press-fitting direction of the support piece.

  In another preferable aspect, in any of the aspects of the electronic circuit device, the support piece has two openings penetrating in the thickness direction, and the bracket holding part is formed with a hook-like tip. Each arm is engaged with an inclined surface in contact with the support piece at the time of press-in of the support piece, and an opening edge of each opening of the support piece after the press-in of the support piece. And a locking surface for stopping.

  In another preferable aspect, in any of the aspects of the electronic circuit device, the inclined surface is inclined with respect to the press-fitting direction of the support piece, and the first inclined surface and the inclined surface are inclined relative to the first inclined surface. Is constituted by a long second inclined surface.

  Moreover, as an electronic circuit apparatus with a vehicle body side bracket based on the Example described above, the thing of the aspect described below is considered, for example.

  An electronic circuit device comprising: a vehicle body side bracket having a support piece; an exterior member having a bracket holding portion to which the support piece is press-fitted; and at least one circuit board accommodated in the exterior member. In one aspect, the bracket holding portion includes support surfaces facing in a direction opposite to each other so as to sandwich the pair of side edges of the support piece from one side to another. At least one of the support surfaces has a step shape so that part of the thickness of the side edge of the support piece is in contact when viewed in a cross section orthogonal to the press-fitting direction of the support piece.

  In a preferable aspect of the electronic circuit device with a vehicle body side bracket, the side edge of the support piece is formed in a concavo-convex shape which is continuous along the press-fitting direction of the support piece.

  In another preferable aspect, in any of the aspects of the vehicle-body-side bracketed electronic circuit device, the side edge of the support piece is formed in a wave shape.

  In another preferable aspect, in any of the aspects of the vehicle-body-side bracketed electronic circuit device, the clearance between the side edge of the support piece and the support surface increases along the press-fitting direction of the support piece.

  In another preferable aspect, in any of the aspects of the electronic circuit device with a vehicle body side bracket, the support piece has two openings penetrating in the thickness direction, and the bracket holding portion has a tip end A pair of arm portions formed in a hook shape is provided, and each arm portion has an inclined surface in contact with the support piece at the time of press-in of the support piece, and an opening of each opening of the support piece after the press-in of the support piece. And a locking surface for locking to the edge.

  In another preferable aspect, in any of the aspects of the electronic circuit device with a vehicle body side bracket, the inclined surface is inclined with respect to the press-fitting direction of the support piece, and a first inclined surface and the first inclined surface. It is comprised by the 2nd inclined surface whose slope is longer than a surface.

DESCRIPTION OF SYMBOLS 1 ... Body side bracket, 2 ... electronic circuit device, 3 ... exterior member, 8 ... short side wall part, 10 ... 1st arm part, 11 ... 2nd arm part, 12: bracket holding portion, P: press-fitting direction, 13: support piece, 13b: side edge, 21: support surface, 22: groove portion, 23: ridge portion, 28: position restricting portion, 31: locking surface, 32: inclined surface, 32a: first inclined surface, 32b: second inclined surface, 42: recess, 43 · Top, 45 · · · · · · · · · · · · · · · · · · · · · · · · · · protrusion

Claims (12)

An electronic circuit device comprising: at least one circuit board; and an exterior member accommodating the circuit board, wherein the exterior member includes a bracket holding portion to which a support piece of a vehicle body side bracket is press-fitted.
The bracket holding portion includes support surfaces facing in directions facing each other so as to sandwich the pair of side edges of the support piece from both sides,
At least one of the support surfaces is
An electronic circuit device having a step shape such that a part of the thickness of the side edge of the support piece is in contact with a cross section orthogonal to the press-fitting direction of the support piece.   The electronic circuit device according to claim 1, wherein the side edge of the support piece is formed in a concavo-convex shape that is continuous along the press-fitting direction of the support piece.   The electronic circuit device according to claim 2, wherein the side edge of the support piece is formed in a wave shape.   The electronic circuit device according to claim 2, wherein a clearance between a side edge of the support piece and the support surface increases along a press-fitting direction of the support piece. The support piece has two openings penetrating in its thickness direction,
The bracket holding portion includes a pair of arm portions whose ends are formed in a hook shape, and each arm portion has an inclined surface in contact with the support piece when the support piece is press-fitted, and the arm portion after the press-fit of the support piece. The electronic circuit device according to claim 1, further comprising: a locking surface that locks the opening edge of each opening of the support piece.   The inclined surface is inclined with respect to the press-fitting direction of the support piece, and is configured of a first inclined surface and a second inclined surface having a longer slope than the first inclined surface. The electronic circuit device according to claim 5. A vehicle side bracket having a support piece,
An electronic circuit device comprising: an exterior member having a bracket holding portion into which the support piece is press-fitted; and at least one circuit board accommodated in the exterior member.
In an electronic circuit device with a vehicle body side bracket provided with
The bracket holding portion includes support surfaces facing in directions facing each other so as to sandwich the pair of side edges of the support piece from both sides,
At least one of the support surfaces is
An electronic circuit device with a vehicle body side bracket, wherein a step shape is formed such that a part of the thickness of the side edge of the support piece is in contact with a cross section orthogonal to the press-fitting direction of the support piece.   8. The electronic circuit device with a vehicle body side bracket according to claim 7, wherein the side edge of the support piece is formed in a concavo-convex shape which is continuous along the press-fitting direction of the support piece.   The electronic circuit device with a vehicle body side bracket according to claim 8, wherein the side edge of the support piece is formed in a wave shape.   The electronic circuit device with a vehicle body side bracket according to claim 8, wherein the clearance between the side edge of the support piece and the support surface increases along the press-fitting direction of the support piece. The support piece has two openings penetrating in its thickness direction,
The bracket holding portion includes a pair of arm portions whose ends are formed in a hook shape, and each arm portion has an inclined surface in contact with the support piece when the support piece is press-fitted, and the arm portion after the press-fit of the support piece. The electronic circuit device with a vehicle body side bracket according to claim 7, further comprising: a locking surface for locking the opening edge of each opening of the support piece.   The inclined surface is inclined with respect to the press-fitting direction of the support piece, and is configured of a first inclined surface and a second inclined surface having a longer slope than the first inclined surface. The electronic circuit device with a vehicle body side bracket according to claim 11.

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