JP6244956B2 - Housing assembly structure and housing assembly method - Google Patents

Description

  The present invention relates to a housing assembly structure and a housing assembly method for a housing configured by assembling a cover to a case.

  2. Description of the Related Art Conventionally, as a technique related to a housing assembly structure configured by assembling a cover to a case, for example, a housing assembly structure of an electronic control device disclosed in Patent Document 1 below is known. In this electronic control device, a flat surface connected to the outer surface is formed along the width direction of the lower surface at the peripheral portion of the lower case formed by die casting, and from the inner side to the outer surface of the flat surface. A protruding wall portion that protrudes is formed. Further, the peripheral portion of the upper case formed by press molding is formed in a step shape so as to be joined to the outer side surface, the flat surface, and the outer side wall surface of the protruding wall portion via a sealing material. Thereby, even if the length of the flat surface in the width direction is shortened, a leak path for maintaining the necessary waterproof function can be secured by the outer surface and the outer wall surface.

JP 2013-033784 A

  By the way, with the recent demand for product miniaturization, the accuracy required for assembling the housing is increasing. On the other hand, if the cover is mounted on the case so that the cover is guided to the guide surface using an assembly tool, the cover and the guide surface will be worn. If so, the assembling accuracy may deteriorate due to the large backlash. For this reason, if an assembly jig that can maintain high assembly accuracy without being guided by a guide surface or the like is employed, there is a problem that the cost of the assembly jig is increased, and when an ordinary assembly jig is employed. Since the position is difficult to align, the number of man-hours for the assembly operator increases. Especially in cases where a waterproof structure is required, if the sealing material applied to the case comes into contact with a part different from the specified position of the cover during assembly work, the sealing material is scraped off and necessary for sealing between the case and the cover. A shortage can affect product quality.

  The present invention has been made to solve the above-described problems, and an object of the present invention relates to an assembling operation of a casing configured by assembling a cover to a case. An object of the present invention is to provide a housing assembly structure and a housing assembly method that can be assembled with high accuracy.

To achieve the above object, the invention according to claim 1 is an assembled state in which the outer edge (41b) of the cover (40, 40a to 40d) and the outer edge (30) of the case (20, 20a to 20d) are opposed to each other. a assembly structure of the casing (11) which is formed by, in the case, on which is one rotation support surface of a plurality of edge surfaces forming the outer edge (32), said pivot support Protrusions (32a, 32b) which are arranged at positions protruding outward from the outer surface continuous with the surface, project upward from the rotation support surface, and have a circular cross section perpendicular to the longitudinal direction of the rotation support surface. The cover is formed with a hooking portion (47, 47b) by a facing surface (42) facing the rotating support surface in the assembled state and a connecting piece (46) connected to the facing surface. The rotation support surface among the plurality of edge surfaces Engagement portions (41d, 43a, 44a) that are engaged with the engaged portions (33a, 33b, 34a, 34b) provided on any of the different surfaces (33, 34) in the assembled state are formed. The cover that is rotated in a state in which the corner (47a) of the hooking portion is in contact with the protrusion is engaged with the engaged portion at the engaging portion, whereby the cover is moved to the case. The said housing | casing assembled | attached to is formed.

The invention according to claim 11 is a housing formed by an assembled state in which the outer edge (41b) of the cover (40, 40a to 40d) and the outer edge (30) of the case (20, 20a to 20d) are opposed to each other. A method of assembling a body (11), wherein the case has an outer surface connected to the rotation support surface on a rotation support surface (32) which is one of a plurality of edge surfaces constituting the outer edge. Protrusions (32a, 32b) that are arranged at positions protruding outward from the rotation support surface, project upward from the rotation support surface, and have an arcuate cross section perpendicular to the longitudinal direction of the rotation support surface are formed on the cover. In the assembled state, a hooking portion (47, 47b) is formed by the facing surface (42) facing the rotation support surface and the connecting piece (46) connected to the facing surface, and the plurality of edges Of the surfaces, a surface different from the rotation support surface (33 34) engaging portions (41d, 43a, 44a) that are engaged with the engaged portions (33a, 33b, 34a, 34b) provided in any one of the above-described assembled states are formed. With the corner (47a) in contact with the protrusion, the contact portion with the protrusion is rotated around the rotation center (L) to engage the engaging portion with the engaged portion. The cover is assembled to the case to form the casing.
In addition, the code | symbol in the parenthesis of a claim and the said means shows a corresponding relationship with the specific means as described in embodiment mentioned later.

  In the first aspect of the invention, the case is formed with a protrusion on the rotation support surface whose cross section perpendicular to the longitudinal direction of the rotation support surface is an arc shape. In addition, the cover has a hook portion formed by an opposing surface facing the rotation support surface and a connecting piece, and is provided on any one of the plurality of edge surfaces different from the rotation support surface. An engaging portion that is engaged with the engaged portion when assembled is formed. Then, the cover that is rotated in a state in which the corner portion of the hooking portion is in contact with the protrusion is engaged with the engaged portion by the engaging portion, thereby forming a housing in which the cover is assembled to the case. .

  In the invention of claim 11, the case is formed with a protrusion on the rotation support surface whose cross section perpendicular to the longitudinal direction of the rotation support surface is an arc shape. In addition, the cover has a hook portion formed by an opposing surface facing the rotation support surface and a connecting piece, and is provided on any one of the plurality of edge surfaces different from the rotation support surface. An engaging portion that is engaged with the engaged portion when assembled is formed. Then, with the corner of the hooking part in contact with the protrusion, the cover is assembled to the case by rotating around the contact point with the protrusion and engaging the engaging part with the engaged part. Thus, a housing is formed.

  As a result, the assembly work for assembling the cover to the case is completed with a simple operation of rotating the cover positioned on the case so that the corner portion of the hooking portion is in contact with the protrusion toward the case. . In such assembling work, since the assembling accuracy is caused by the contact state of the corners and protrusions of the hooking part and the engaging state of the engaging part and the engaged part, Assembling accuracy can be improved by forming the portion and the engaged portion with high accuracy. Therefore, it is possible to realize a housing assembling structure and a housing assembling method that can be easily and highly accurately assembled by an assembling worker with respect to the assembling operation of the housing configured by assembling the cover to the case.

It is a perspective view which shows the electronic control apparatus which concerns on this embodiment. It is sectional drawing of the electronic control apparatus of FIG. It is a top view of a case. It is the figure which looked at the case from the connector exposure side. It is sectional drawing by the cut surface equivalent to the AA line shown in FIG. FIG. 4 is an enlarged top view showing the vicinity of an engagement protrusion 33a in FIG. 3. FIG. 4 is an enlarged top view showing the vicinity of an engaging protrusion 33b in FIG. It is a perspective view of the cover seen from the inner surface side. It is sectional drawing for demonstrating the positional relationship of the hook part of a cover at the time of an assembly | attachment operation | work, and both protrusions of a case. It is a side view which shows the positional relationship of the cover which rotates and the fastening part of a case. It is sectional drawing which shows the engagement state of the edge part for engagement, and an engagement protrusion. It is sectional drawing which expands and shows the principal part of the housing | casing which concerns on 2nd Embodiment. It is a perspective view which expands and shows the fastening part 28a vicinity of the housing | casing which concerns on 3rd Embodiment. It is a perspective view which expands and shows the fastening part 28b vicinity of the housing | casing which concerns on 3rd Embodiment. It is sectional drawing for demonstrating the engagement state of the engaging part of a cover, and the outer edge of a case. It is sectional drawing which expands and shows the engagement state of the pin-shaped protrusion and engagement hole which concern on 4th Embodiment. It is a top view which expands and shows the fastening part 28b vicinity of the housing | casing which concerns on 5th Embodiment. It is a side view which shows the positional relationship of the cover and rotating part which rotate.

[First Embodiment]
Hereinafter, a first embodiment that embodies a housing assembly structure and a housing assembly method according to the present invention will be described with reference to the drawings.
An electronic control device 10 shown in FIG. 1 has a waterproof structure, and is, for example, a device that is disposed in an engine room of a vehicle and has a function of executing engine control in accordance with a driving operation by a driver.

  As shown in FIGS. 1 and 2, the electronic control device 10 includes a housing 11 having a case 20 and a cover 40, and a circuit board 12 on which an external connection connector 13 and other electronic components are mounted. ing. The circuit board 12 is accommodated in a sealed space formed by the case 20, the cover 40, and the connector 13, so that the waterproof property for the circuit board 12 is ensured.

  Next, the detailed shape of the case 20 will be described with reference to the drawings. FIG. 3 is a top view of the case 20. FIG. 4 is a view of the case 20 as viewed from the connector exposed side. FIG. 5 is a cross-sectional view taken along the line AA shown in FIG. 6 is an enlarged top view showing the vicinity of the engaging protrusion 33a of FIG. FIG. 7 is an enlarged top view showing the vicinity of the engaging protrusion 33b of FIG.

  The case 20 is formed by aluminum die-casting, and as shown in FIGS. 2 to 4, the bottom is formed so that the side where the connector 13 is exposed (hereinafter also referred to as “connector exposed side”) has a step. The upper side and the connector exposed side are opened by the wall 21 and the three side walls 22 to 24 connected to the bottom wall 21 so that the outer edge 30 constituted by the upper end surfaces of the side walls 22 to 24 is substantially U-shaped. Is formed. A plurality of heat radiating fins 21 a are arranged on the outer surface of the bottom wall 21. In the following description, as shown in FIG. 3, the direction along the longitudinal direction of the side wall 22 is described as the X direction, and the direction orthogonal to the X direction is described as the Y direction.

  On the connector exposed side of the bottom wall 21 and the side walls 23, 24, a groove portion 25 for fitting a part of the annular convex portion 13 a formed on the outer surface of the connector 13 is formed. Further, on the side wall 22 side of the bottom wall 21, support bases 26a and 26b for supporting the end portion of the circuit board 12 from below are formed. In addition, two attachment holes 27 a to 27 d for fixing and fastening the electronic control device 10 are formed on the outer surfaces of the side wall 23 and the side wall 24.

  In addition, a protruding wall portion 31 is formed on the inner side of the outer edge 30 of the case 20 to prevent the seal material from flowing out into the accommodation space. The outer edge 30 is formed with fastening portions 28a to 28d in which screw holes for fastening the cover 40 with screws 14a to 14d are formed at positions corresponding to the four corners.

  The outer edge 30 includes an edge surface (hereinafter also referred to as a rotation support surface 32) that forms the upper end surface of the side wall 22, an edge surface 33 that forms the upper end surface of the side wall 23, and an edge surface that forms the upper end surface of the side wall 24. 34. That is, the substantially U-shaped outer edge 30 is formed by the rotation support surface 32 and the two edge surfaces 33 and 34 connected to both ends of the rotation support surface 32.

  Two protrusions 32 a and 32 b are provided on the outer side of the rotation support surface 32. As shown in FIG. 5, the protrusion 32 a is formed so that a cross section perpendicular to the longitudinal direction of the rotation support surface 32 has an arc shape. Similarly, the protrusion 32b is formed so that a cross section orthogonal to the longitudinal direction of the rotation support surface 32 is arcuate. Further, the side wall 22 is formed such that the outer surface 22a is recessed inwardly of the both protrusions 32a and 32b.

  On the edge surface 33, a portion away from the rotation support surface 32 (in the example of FIG. 3, a portion near the fastening portion 28a) and a portion close to the rotation support surface 32 (in the example of FIG. 3, near the fastening portion 28b). Engaging projections 33a and 33b are provided on the respective parts. In addition, the edge surface 34 also has a portion away from the rotation support surface 32 (in the example of FIG. 3, a portion near the fastening portion 28c) and a portion close to the rotation support surface 32 (in the example of FIG. 3, the fastening portion 28d). Engaging projections 34a and 34b are provided respectively. The engagement protrusions 33a and 33b and the engagement protrusions 34a and 34b function for positioning the attached cover 40.

  In particular, the engagement protrusion 33a and the engagement protrusion 34a function to position the cover 40 in the Y direction. The engagement protrusions 33a and 34a are end portions on the connector side of the cover 40 (hereinafter also referred to as engagement end portions 41d) that are rotated about a rotation center L as a contact point with both the protrusions 32a and 32b as will be described later. ) Are arranged at positions where they engage. For this reason, as shown in FIG. 6, the engagement protrusion 33 a is formed with a taper 35 that functions as a guide surface at a portion that contacts the cover 40 from the Y direction. Similarly, a taper 35 is formed on the engaging protrusion 34a.

  Further, the engagement protrusion 33b and the engagement protrusion 34b function to position the cover 40 in the X direction and the Y direction. Therefore, as shown in FIG. 7, the engagement protrusion 33 b is formed with a taper 36 a that functions as a guide surface at a portion that contacts the cover 40 from the X direction, and contacts the cover 40 from the Y direction. A taper 36b that functions as a guide surface is formed at the site. Similarly, the engagement protrusion 34b is formed with tapers 36a and 36b.

  Further, a fastening portion 28b is formed at an end portion of the edge surface 33 located outside the rotation center L (upper side in FIG. 3 (Y-direction positive side)) to eliminate contact with the cover 40. A recess 33c that is recessed to be lower than the surface is formed. Further, in order to eliminate contact with the cover 40 at the end portion of the edge surface 34 located outside the rotation center L, a concave portion 34c is formed so as to be lower than the surface on which the fastening portion 28d is formed. Has been.

Next, the detailed shape of the cover 40 will be described with reference to FIG. FIG. 8 is a perspective view of the cover 40 as viewed from the inner surface side.
The cover 40 is formed, for example, by press-molding a steel material. As shown in FIG. 8, the top plate portion 41a has a step that protrudes upward in a substantially rectangular shape with respect to the substantially U-shaped outer edge 41b. It is formed as follows.

  The outer edge 41b is a part facing the outer edge 30 of the case 20 through a sealing material when assembled with the case 20. The outer edge 41b includes an edge surface (hereinafter also referred to as a facing surface 42) facing the rotation support surface 32, an edge surface 43 and an edge surface 44 facing the edge surface 33 and the edge surface 34, when assembled with the case 20. It has.

  The outer edge 41b is formed with through holes 45a to 45d through which the screws 14a to 14d fastened to the screw holes of the fastening portions 28a to 28d of the case 20 are inserted at positions corresponding to the four corners.

  A connecting piece 46 that hangs at a substantially right angle is formed at the outer peripheral end of the facing surface 42 so as to continue to the facing surface 42. The connecting piece 46 and the facing surface 42 constitute a hooking portion 47 in which the angle of the connecting piece 46 with respect to the facing surface 42 is substantially a right angle.

  On the edge surface 43, a notch 43 a is formed in the vicinity of the through hole 45 b so that the engaging protrusion 33 b engages with the case 20. Further, the edge surface 44 is formed with a notch 44a in the vicinity of the through hole 45d so that the engagement protrusion 34b engages with the case 20 when assembled. Note that the vicinity of the through hole 45a and the vicinity of the through hole 45c of the outer edge 41b protrude outwardly from the other parts as rotating handle portions 48a and 48b held during assembly work. Is formed.

  Next, assembly work for assembling the cover 40 formed as described above to the case 20 will be described with reference to FIGS. FIG. 9 is a cross-sectional view for explaining the positional relationship between the hooking portion 47 of the cover 40 and the protrusions 32a and 32b of the case 20 during assembly work, and FIG. 9A shows the hooked state. FIG. 9B shows the assembly work completion state. FIG. 10 is a side view showing the positional relationship between the rotating cover 40 and the fastening portion 28 b of the case 20. FIG. 11 is a cross-sectional view showing an engagement state between the engagement end portion 41d and the engagement protrusion 33a. In FIG. 9 and the like, the sealing material is not shown for convenience. Moreover, in FIG. 10, the outer edge 41b at the time of completion of assembly is illustrated by a two-dot chain line.

  In the assembly process of assembling the cover 40 to the case 20, first, the circuit board 12 on which the connector 13 and the like are mounted is prepared, and the support base 26 a, with the annular convex portion 13 a of the connector 13 fitted in the groove portion 25. The circuit board 12 is accommodated in the case 20 by fastening to the screw 26b using the screw 15. Next, a sealing material is annularly applied to a portion of the outer edge 30 of the case 20 outside the protruding wall portion 31 and the annular convex portion 13 a of the connector 13.

  Subsequently, the rotating handle portions 48a and 48b of the cover 40 are gripped and hooked so that the corner portion 47a of the hook portion 47 is brought into contact with both protrusions 32a and 32b as shown in FIG. 9A. . At this time, since the outer side surface 22a of the side wall 22 is formed so as to be recessed inwardly from the both protrusions 32a and 32b, the connecting piece 46 does not contact the outer side surface 22a in the hooked state.

  Further, as shown in FIG. 10, since the recess 33 c is formed on the edge surface 33 and the recess 34 c is formed on the edge surface 34, the outer edge 41 b of the cover 40 is connected to the outer edge 30 of the case 20 in the hooked state. There is no contact.

  Then, from the hooked state as described above, the cover 40 is rotated with the contact point between the protrusions 32a and 32b as the rotation center L. Then, as shown in FIG. 9B, the notches 43a and 44a are engaged with the projections 33b and 34b by rotating the cover 40 until it contacts the sealing material applied to the outer edge 30 of the case 20. And the connector-side engaging end 41d engages with the engaging protrusions 33a and 34a.

  At this time, as shown in FIG. 11, since the taper 35 is formed on the engagement protrusion 33a, the cover 40 in contact with the engagement protrusion 33a at the engagement end 41d is guided by the taper 35. Thus, the engaging end 41d is positioned. In particular, the gap G between the engagement protrusion 33a and the engagement end 41d is set to be the smallest gap that can be engaged.

  Further, since the engagement protrusion 34a and the engagement protrusions 33b and 34b are also formed with the taper 35 and the tapers 36a and 36b, respectively, they are guided by the respective tapers 35, 36a and 36b, and the engagement end portion 41d and the cutting edge 41d. The notches 43a and 44a are positioned. The gap between the engagement protrusion 34a and the engagement end portion 41d and the gap between the engagement protrusions 33b and 34b and the notches 43a and 44a are also set to be the minimum gap that can be engaged.

  As a result, the assembly of the housing 11 is completed in which the outer edge 41b of the cover 40 and the outer edge 30 of the case 20 are opposed to each other and the sealing property is secured using the sealing material.

  As described above, in the housing assembly structure and the housing assembly method according to this embodiment, the case 20 has a cross section on the rotation support surface 32 and perpendicular to the longitudinal direction of the rotation support surface 32. Two protrusions 32a and 32b having a circular arc shape are formed. Further, the cover 40 is formed with a hooking portion 47 by the facing surface 42 facing the rotation support surface 32 and the connecting piece 46, and the engaging projection 33b and the edge surface 34 of the edge surface 33 in the assembled state. A notch 43a and a notch 44a that are engaged with the engaging protrusion 34b are formed, and an engaging end 41d on the connector side is formed so as to engage with the engaging protrusions 33a and 34a.

  The cover 40 rotated in a state where the corner 47a of the hook portion 47 is in contact with both the protrusions 32a and 32b is engaged with the engagement protrusions 33a and 34a and the engagement at the engagement end 41d and the notches 43a and 44a. By engaging with the mating protrusions 33b and 34b, the housing 11 in which the cover 40 is assembled to the case 20 is formed. In other words, with the corner portion 47a of the hook portion 47 being in contact with both the protrusions 32a and 32b, the engaging end 41d and the notch are rotated by turning the contact point with both the protrusions 32a and 32b as the rotation center L. The housing 11 is formed by assembling the cover 40 to the case 20 by engaging 43a, 44a with the engaging protrusions 33a, 34a and the engaging protrusions 33b, 34b.

  As a result, the cover 40 is a simple operation such as turning the cover 40 positioned on the case 20 so that the corner portion 47a of the hooking portion 47 is in contact with both the protrusions 32a and 32b. Assembling work for assembling to the case 20 is completed. In such assembling work, the assembling accuracy is such that the contact state between the corner 47a of the hook portion 47 and both the protrusions 32a and 32b, the engaging end 41d, the notches 43a and 44a, and the engaging protrusions 33a, 34a and 33b. , 34b, the hooking portion 47, both projections 32a, 32b, the engaging end portion 41d, the notches 43a, 44a and the engaging projections 33a, 34a, 33b, 34b are formed with high accuracy. As a result, the assembly accuracy can be improved. Therefore, regarding the assembly work of the housing 11 configured by assembling the cover 40 to the case 20, it is possible to realize a housing assembly structure and a housing assembly method that can be assembled easily and with high accuracy by an assembly operator. Can do.

  Further, since the two protrusions 32a and 32b are formed on the rotation support surface 32 as the protrusions having an arcuate cross section constituting the rotation center L, compared with the case where one protrusion is formed on the rotation support surface 32. And the rattling of the hook part 47 at the time of contact is suppressed. For this reason, since the shake of the cover 40 with respect to the case 20 at the time of assembly | attachment is suppressed, a more highly accurate assembly | attachment is realizable.

  In addition, the number of protrusions having an arcuate cross section is not limited to two provided on the rotation support surface 32, and three or more protrusions may be provided. In addition, one protrusion may be provided on the rotation support surface 32 as long as the protrusion of the cover 40 with respect to the case 20 during assembly is suppressed. In addition, the protrusion constituting the rotation center L is not limited to be formed in a circular arc shape in cross section, and may have a shape that can be rotated in a state where the hook portion 47 is hooked on the outer surface.

  Further, the case 20 is formed so that the outer surface 22 a of the side wall 22 connected to the rotation support surface 32, that is, the portion facing the connecting piece 46 of the cover 40 is recessed inward. For this reason, even when the hooking portion 47 is hooked so as to be in contact with both the protrusions 32a and 32b, it is possible to prevent the rotation of the connecting piece 46 from being hindered due to the contact of the connecting piece 46 with the outer surface 22a. it can.

  In particular, the engagement protrusions 33 a and 34 a are disposed at a position away from the rotation support surface 32, and the engagement protrusions 33 b and 34 b are disposed at a position close to the rotation support surface 32. Thereby, since the cover 40 can be clamped by the engagement protrusions 33a, 34a, 33b, and 34b from both directions in the X direction and the Y direction, more accurate assembly can be realized.

  Further, the engagement protrusions 33a and 34a are formed with a taper 35 at a portion that contacts the cover 40 from the Y direction, and the engagement protrusions 33b and 34b contact the cover 40 from the X direction and the Y direction. The taper 36a, 36b is formed in the part to do. Thereby, since the cover 40 guided by each taper 35, 36a, 36b is positioned at a predetermined position, highly accurate assembly can be easily realized without being influenced by the skill of the assembly operator. .

  Further, a concave portion 33c is formed at an end portion outside the rotation center L of the edge surface 33, and a concave portion 34c is formed at an end portion outside the rotation center L of the edge surface 34. In the hooked state, since the outer edge 41b of the cover 40 contacts the outer edge 30 of the case 20, it is possible to prevent the rotation from being hindered.

[Second Embodiment]
Next, a housing assembly structure and a housing assembly method according to the second embodiment of the present invention will be described with reference to FIG. FIG. 12 is an enlarged cross-sectional view illustrating a main part of the housing according to the second embodiment.
The second embodiment is mainly different from the first embodiment in that the shape of the hook portion of the cover and the shape of the side wall of the case are changed. For this reason, substantially the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 12, unlike the cover 40 described above, the cover 40a according to the present embodiment is formed such that the angle of the connecting piece 46 with respect to the facing surface 42, that is, the opening angle of the hook portion 47b becomes an obtuse angle. ing. Further, unlike the case 20 described above, the case 20 a according to the present embodiment is formed so that the upper part of the outer surface 22 b of the side wall 22 is orthogonal to the rotation support surface 32.

  Thus, even when the cover 40a and the case 20a are formed, the connecting piece 46 is in contact with the outer surface 22b when the corner portion 47a of the hook portion 47b is hooked so as to be in contact with both the protrusions 32a and 32b. It is possible to prevent the rotation from being hindered.

  In particular, the position of the split surface in the mold when forming the case 20a can be made lower than the portion orthogonal to the rotation support surface 32 (the upper portion of the outer surface 22b). For this reason, it is possible to prevent the flash generated in the vicinity of both the protrusions 32 a and 32 b from being obstructed from the rotation with respect to the corner portion 47 a of the hook portion 47.

  In addition, the structure of the outer side surface 22b and the hook part 47b which are the characteristic structures of this embodiment is applicable also to the case and cover of other embodiment.

[Third Embodiment]
Next, a housing assembly structure and a housing assembly method according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 13 is an enlarged perspective view showing the vicinity of the fastening portion 28a of the housing according to the third embodiment. FIG. 14 is an enlarged perspective view showing the vicinity of the fastening portion 28b of the housing according to the third embodiment. FIG. 15 is a cross-sectional view for explaining an engaged state between the engaging portion 43c of the cover 40b and the outer edge 30 of the case 20b.
The third embodiment is mainly different from the first embodiment in that the engagement state between the engagement portion of the cover and the engaged portion of the case is changed. For this reason, substantially the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 13 and FIG. 14, the case 20 b according to the present embodiment is formed so that the engaging protrusions 33 a, 34 a, 33 b, 34 b are abolished unlike the case 20 described above. Further, unlike the cover 40 described above, the cover 40b according to the present embodiment is bent at the edge surface 43 of the engagement portions 43c to 43e that can be engaged with the outer surface of the case 20 instead of the notch 43a. Etc. are formed. Further, on the edge surface 44, an engaging portion that functions in the same manner as the engaging portions 43c to 43e is formed instead of the notch 44a.

  In particular, as shown in FIG. 15, a taper 38 that functions as a guide surface is formed at an edge portion of the outer edge 30 of the case 20 b where the engaging portion 43 c engages. Similarly, a taper 38 functioning as a guide surface is also formed on the edge of the outer edge 30 of the case 20b where the engaging portions 43d and 43e are engaged. Further, the gap G between the outer side surface of the outer edge 30 and the inner side surfaces of the engaging portions 43c to 43e is set to be the smallest gap that can be engaged.

  Even in this way, by assembling the case 40b while rotating the cover 40b so that each of the engaging portions 43c to 43e is engaged with the outer surface of the case 20b, at each of the engaging portions 43c to 43e, Since the cover 40b can be clamped from both directions in the X direction and the Y direction, more accurate assembly can be realized.

  In particular, since it is not necessary to provide the engaging protrusions 33a, 33b, 34a, 34b and the like on the outer edge 30 of the case 20b, the case 20b can be downsized, that is, the housing 11 can be downsized.

  In addition, the engagement state of the engaging portion of the cover and the engaged portion of the case, which is a characteristic configuration of the present embodiment, can be applied to other embodiments.

[Fourth Embodiment]
Next, a housing assembly structure and a housing assembly method according to the fourth embodiment of the present invention will be described with reference to FIG. FIG. 16 is an enlarged cross-sectional view illustrating the engagement state between the pin-shaped protrusion 37 and the engagement hole 49 according to the fourth embodiment.
The fourth embodiment is mainly different from the first embodiment in that the engagement state between the engagement portion of the cover and the engaged portion of the case is changed. For this reason, substantially the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  Unlike the case 20 described above, the case 20c according to the present embodiment is formed with pin-like protrusions 37 shown in FIG. 16 instead of the engaging protrusions 33a, 33b, 34a, and 34b. The pin-shaped protrusion 37 includes a substantially cylindrical base end portion 37a and a tapered distal end portion 37b that functions as a guide surface. In particular, one or more flat surfaces 37c formed in a flat shape for positioning the cover are formed on a part of the outer peripheral surface of the base end portion 37a.

  Further, unlike the cover 40 described above, the cover 40c according to the present embodiment has an engagement hole 49 that can be engaged with the base end portion 37a when the pin-like protrusion 37 is assembled in place of the notches 43a and 44a. Is formed.

  In this way, by engaging the case 20c while rotating the cover 40c so that each engagement hole 49 is engaged with the corresponding pin-shaped protrusion 37, the engagement hole 49 and the pin that are engaged at a plurality of positions are assembled. Since the cover 40c can be sandwiched by the base end portion 37a of the projection 37 from both sides in the X direction and the Y direction, more accurate assembly can be realized.

  Note that the pin-shaped protrusion 37 is not limited to a tapered tip end, and may be formed in an R shape or a tapered shape, for example.

  In addition, the structure of the pin-shaped protrusion 37 and the engagement hole 49 which are the characteristic structures of this embodiment can be applied also to the case and cover of other embodiment.

[Fifth Embodiment]
Next, a housing assembly structure and a housing assembly method according to a fifth embodiment of the present invention will be described with reference to FIGS. 17 and 18. FIG. 17 is an enlarged top view showing the vicinity of the fastening portion 28b of the housing according to the fifth embodiment. FIG. 18 is a side view showing the positional relationship between the rotating cover 40d and the fastening portion 28b. In FIG. 17, for convenience, the cover 40 d is indicated by a broken line, and in FIG. 18, the outer edge 41 b at the time of completion of assembly is indicated by a two-dot chain line.
The fifth embodiment is mainly different from the first embodiment in that the shape of the case and cover in the vicinity of the fastening portion 28b and the fastening portion 28d is changed. For this reason, substantially the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  Unlike the case 20 described above, the case 20d according to the present embodiment has the recessed portion 33c and the recessed portion 34c eliminated in the fastening portion 28b and the fastening portion 28d. Further, unlike the cover 40 described above, the cover 40d according to the present embodiment has a notch so as to eliminate a portion located outside the rotation center L that may come into contact with the case 20d during rotation. Is formed. Specifically, as shown in FIG. 17, a notch 43 f is formed in a portion of the edge surface 43 that faces the portion corresponding to the recess 33 c. Further, a notch is also formed in a portion of the edge surface 44 that faces the portion corresponding to the recess 34c.

  Even in this case, as shown in FIG. 18, in the hooked state, the contact between the outer edge 41b of the cover 40d and the outer edge 30 of the case 20d inhibits the rotation based on the rotation center L. Can be eliminated. In particular, since the concave portion 33c and the concave portion 34c can be eliminated from the outer edge 30 of the case 20d, the salt water or the like hardly accumulates on the case 20d even in a use environment in which the salt water or the like adheres, thereby improving the corrosion resistance. it can.

  Note that the characteristic configuration of the present embodiment can also be applied to cases and covers of other embodiments.

In addition, this invention is not limited to said each embodiment, You may actualize as follows.
(1) The outer edges 30 of the cases 20 and 20a to 20d and the outer edges 41b of the covers 40 and 40a to 40d are not limited to being formed in a quadrangular annular shape including the seal part of the exposed part such as the connector 13, but are, for example, polygonal It may be formed in an annular shape, or a part thereof may be formed in an arc shape except for the rotation support surface 32 and the opposed surface 42.

(2) The cases 20 and 20a to 20d are not limited to being formed by aluminum die casting, and may be formed by synthetic resin, for example. Further, the covers 40, 40a to 40d are not limited to being formed by press forming a steel material, and may be formed by, for example, aluminum die casting.

(3) The present invention is not limited to being applied to the casing 11 of the electronic control device 10, but may be applied to a casing of an apparatus having other functions and requiring waterproofness. In addition, it is possible to appropriately change the detailed configuration within the scope of the gist of the present invention.

DESCRIPTION OF SYMBOLS 11 ... Housing | casing 20, 20a-20d ... Case 30 ... Outer edge 32 ... Rotation support surface 32a, 32b ... Protrusion 33, 34 ... Edge surface 33a, 33b, 34a, 34b ... Engagement protrusion (engaged part)
35, 36a, 36b ... Taper 40, 40a-40d ... Cover 41b ... Outer edge 42 ... Opposing surface 43, 44 ... Edge surface 43a, 44a ... Notch (engagement part)
46 ... Connecting piece 47, 47b ... Hook 47a ... Corner L ... Rotation center

Claims (28)

An assembly structure of a housing (11) formed by an assembly state in which an outer edge (41b) of a cover (40, 40a to 40d) and an outer edge (30) of a case (20, 20a to 20d) are opposed to each other. ,
The case is disposed on a rotation support surface (32), which is one of a plurality of edge surfaces constituting the outer edge, at a position protruding outward from an outer surface continuous to the rotation support surface. Protrusions (32a, 32b) that protrude upward from the dynamic support surface and whose cross section perpendicular to the longitudinal direction of the rotational support surface has an arc shape are formed,
In the cover, a hooking portion (47, 47b) is formed by a facing surface (42) facing the rotation support surface in the assembled state and a connecting piece (46) connected to the facing surface. A member that engages with an engaged portion (33a, 33b, 34a, 34b) provided on any one of a plurality of edge surfaces (33, 34) different from the rotation support surface in the assembled state. Joint portions (41d, 43a, 44a) are formed,
The cover, which is rotated in a state where the corner (47a) of the hook portion is in contact with the protrusion, is engaged with the engaged portion at the engaging portion, so that the cover is attached to the case. An assembled structure of the housing, wherein the assembled housing is formed.   The housing assembly structure according to claim 1, wherein a plurality of the protrusions are formed on the rotation support surface.   The case assembly according to claim 1 or 2, wherein the case is formed such that a portion of the outer surface (22a) connected to the rotation support surface that faces the connecting piece is recessed inward. Attached structure.   The case assembly structure according to any one of claims 1 to 3, wherein the cover is formed so that an angle of the connecting piece with respect to the facing surface is an obtuse angle. The plurality of edge surfaces include two edge surfaces (33, 34) connected to both ends of the rotation support surface,
The engaged portions are respectively disposed in portions (28a, 28c) away from the rotation support surface and portions (28b, 28d) close to the rotation support surface of the two edge surfaces,
5. The housing assembly structure according to claim 1, wherein a plurality of the engaging portions are formed to be able to engage with each of the plurality of engaged portions.   The case set according to any one of claims 1 to 5, wherein the engaged portion is formed with a taper (35, 36a, 36b) for guiding the engaging portion. Attached structure.   The housing assembly structure according to claim 1, wherein the engaged portion is configured by an outer surface of the case that is continuous with a surface different from the rotation support surface. The engaged portion is formed in a pin shape,
The said engaging part is formed as an engaging hole (49) engageable with a pin-shaped engaged part (37), The housing | casing as described in any one of Claims 1-6 characterized by the above-mentioned. Body assembly structure.   Of the plurality of edge surfaces excluding the rotation support surface, a concave portion for eliminating contact with the cover is provided at an end portion located outside the rotation center (L) as a contact portion with the protrusion. (33c, 34c) is formed, The housing | casing assembly structure as described in any one of Claims 1-8 characterized by the above-mentioned.   A cutout (43f) is formed on the outer edge of the cover so as to eliminate a portion located outside the rotation center (L) that is a contact portion with the protrusion except for the connecting piece. The housing assembly structure according to any one of claims 1 to 8. A method for assembling the casing (11) formed by an assembled state in which the outer edge (41b) of the cover (40, 40a to 40d) and the outer edge (30) of the case (20, 20a to 20d) are opposed to each other. ,
The case is disposed on a rotation support surface (32), which is one of a plurality of edge surfaces constituting the outer edge, at a position protruding outward from an outer surface continuous to the rotation support surface. Protrusions (32a, 32b) that protrude upward from the dynamic support surface and whose cross section perpendicular to the longitudinal direction of the rotational support surface has an arc shape are formed,
In the cover, a hooking portion (47, 47b) is formed by a facing surface (42) facing the rotation support surface in the assembled state and a connecting piece (46) connected to the facing surface. A member that engages with an engaged portion (33a, 33b, 34a, 34b) provided on any one of a plurality of edge surfaces (33, 34) different from the rotation support surface in the assembled state. Joint portions (41d, 43a, 44a) are formed,
With the corner portion (47a) of the hooking portion in contact with the protrusion, the engaging portion is engaged with the engaged portion by rotating the contact portion with the protrusion as the rotation center (L). The casing is assembled by forming the casing by assembling the cover to the case.   The housing assembling method according to claim 11, wherein a plurality of the protrusions are formed on the rotation support surface.   The case assembly according to claim 11 or 12, wherein the case is formed such that a portion of the outer surface (22a) continuous to the rotation support surface that faces the connecting piece is recessed inward. How to attach.   The case assembling method according to any one of claims 11 to 13, wherein the cover is formed such that an angle of the connecting piece with respect to the facing surface is an obtuse angle. The plurality of edge surfaces include two edge surfaces (33, 34) connected to both ends of the rotation support surface,
The engaged portions are respectively disposed in portions (28a, 28c) away from the rotation support surface and portions (28b, 28d) close to the rotation support surface of the two edge surfaces,
15. The housing assembling method according to claim 11, wherein a plurality of the engaging portions are formed so as to be engageable with each of the plurality of engaged portions.   The case set according to any one of claims 11 to 15, wherein the engaged portion is formed with a taper (35, 36a, 36b) for guiding the engaging portion. How to attach.   The case assembling method according to any one of claims 11 to 15, wherein the engaged portion is configured by an outer side surface of the case connected to a surface different from the rotation support surface. The engaged portion is formed in a pin shape,
The housing according to any one of claims 11 to 16, wherein the engaging portion is formed as an engaging hole (49) engageable with a pin-like engaged portion (37). Body assembly method.   A recess (33c, 34c) for eliminating contact with the cover is formed at an end located outside the rotation center among the plurality of edge surfaces excluding the rotation support surface. The housing assembling method according to claim 11, wherein the housing assembling method is characterized in that:   The cutout (43f) is formed on the outer edge of the cover so as to eliminate a portion located outside the rotation center except for the connecting piece. The housing assembling method according to one item.   A housing (11) formed by an assembled state in which an outer edge (41b) of a cover (40, 40a to 40d) and an outer edge (30) of a case (20, 20a to 20d) are opposed to each other,
  The case is disposed on a rotation support surface (32), which is one of a plurality of edge surfaces constituting the outer edge, at a position protruding outward from an outer surface continuous to the rotation support surface. Protrusions (32a, 32b) that protrude upward from the dynamic support surface and whose cross section perpendicular to the longitudinal direction of the rotational support surface has an arc shape are formed,
  In the cover, a hooking portion (47, 47b) is formed by a facing surface (42) facing the rotation support surface in the assembled state and a connecting piece (46) connected to the facing surface. A member that engages with an engaged portion (33a, 33b, 34a, 34b) provided on any one of a plurality of edge surfaces (33, 34) different from the rotation support surface in the assembled state. Joint portions (41d, 43a, 44a) are formed,
  The cover, which is rotated in a state where the corner (47a) of the hook portion is in contact with the protrusion, is engaged with the engaged portion at the engaging portion, so that the cover is attached to the case. The assembled case; and
A sealing material disposed between an outer edge (30) of the case and the cover;
An electronic control device comprising: a circuit board 12 housed in the housing. The electronic control device according to claim 21, wherein a plurality of the protrusions are formed on the rotation support surface . The electronic control device according to claim 21 or 22, wherein the case is formed such that a portion of the outer surface (22a) continuous with the rotation support surface that faces the connecting piece is recessed inward. . The electronic control device according to any one of claims 21 to 23, wherein the cover is formed such that an angle of the connecting piece with respect to the facing surface is an obtuse angle . The plurality of edge surfaces include two edge surfaces (33, 34) connected to both ends of the rotation support surface,
The engaged portions are respectively disposed in portions (28a, 28c) away from the rotation support surface and portions (28b, 28d) close to the rotation support surface of the two edge surfaces,
The electronic control device according to any one of claims 21 to 24, wherein a plurality of the engaging portions are formed so as to be engageable with each of the plurality of engaged portions . The electronic control device according to any one of claims 21 to 25, wherein a taper (35, 36a, 36b) for guiding the engaging portion is formed in the engaged portion. . The electronic control device according to any one of claims 21 to 25, wherein the engaged portion is configured by an outer surface of the case connected to a surface different from the rotation support surface . Of the plurality of edge surfaces excluding the rotation support surface, a concave portion for eliminating contact with the cover is provided at an end portion located outside the rotation center (L) as a contact portion with the protrusion. (33c, 34c) is formed, The electronic control apparatus as described in any one of Claims 21-27 characterized by the above-mentioned .

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