CN115804251A - Electronic control device - Google Patents

Electronic control device Download PDF

Info

Publication number
CN115804251A
CN115804251A CN202180038211.2A CN202180038211A CN115804251A CN 115804251 A CN115804251 A CN 115804251A CN 202180038211 A CN202180038211 A CN 202180038211A CN 115804251 A CN115804251 A CN 115804251A
Authority
CN
China
Prior art keywords
control device
electronic control
seal
recess
housing member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202180038211.2A
Other languages
Chinese (zh)
Inventor
斋藤正人
渡会庆仁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Astemo Ltd
Original Assignee
Hitachi Astemo Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Astemo Ltd filed Critical Hitachi Astemo Ltd
Publication of CN115804251A publication Critical patent/CN115804251A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00Casings, cabinets or drawers for electric apparatus
    • H05K5/06Hermetically-sealed casings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

An electronic control device (1) of the present invention includes a first case member (4) having a plurality of fixing portions (41); a second housing member (3) fixed by the first housing member (4) and a plurality of fixing portions (41); a sealing member (5) provided to fill a gap between the first housing member (4) and the second housing member (3); and a substrate accommodated in a space formed by the first case member (4) and the second case member (3). The first housing member (4) and the second housing member (3) have seal holding portions (140, 130) for holding the seal member (5). The seal holding portion (140, 130) has a first recessed portion (141, 131) formed at an intermediate position of the first fixing portion (41 a) and the second fixing portion (41 b); and a second recessed portion (142, 132) formed at an intermediate position of the third fixing portion (41 c) and the fourth fixing portion (41 d).

Description

Electronic control device
Technical Field
The present invention relates to an electronic control device.
Background
An electronic control device having a waterproof standard including a substrate and a case for housing the substrate is known (see patent document 1). In such a waterproof electronic control device, members constituting the housing are connected to each other by a sealing member, thereby sealing the inside of the housing. Therefore, when the electronic control unit is rapidly cooled by water spray, flooding, or the like in a state in which the electronic control unit is driven and at a high temperature, or when the electronic control unit is heated from a cooled state by a rapid increase in the driving load, the housing is deformed (expanded/contracted) by the difference between the internal pressure and the external pressure of the housing. Thus, if a difference between the internal pressure and the external pressure is generated in the casing, a large stress is generated in the seal portion.
Patent document 1 discloses an electronic circuit device whose cover is attached to a controller case via a sealing member. In this electronic circuit device, a flange portion is formed on the entire periphery of the controller case, and the end edge of the lid portion is fitted together with the seal member into a seal holding groove recessed in the flange portion. The sealing member may be formed by curing after applying a sealant (adhesive) to the seal holding groove.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2016-164900
Disclosure of Invention
Technical problem to be solved by the invention
In the device described in patent document 1, a controller case and a lid portion constituting a housing are fixed by two screws. Therefore, for example, when the internal pressure of the case increases, the cover deforms from two fixing points, and the longer the distance from the fixing points, the greater the stress generated in the sealing member bonded to the cover and the controller case. Although the adhesion strength can be improved by applying a large amount of sealant (adhesive) to reduce stress generated in the sealing member and improve the waterproof reliability, this may increase material costs and manufacturing man-hours, which may increase the cost of the device.
The invention aims to provide an electronic control device which is low in cost and high in waterproof reliability.
Means for solving the problems
An electronic control device according to an embodiment of the present invention includes: a first housing member having a plurality of fixing portions; a second housing member fixed by the first housing member and the plurality of fixing portions; a sealing member provided to fill a gap of the first housing member and the second housing member; and a substrate housed in a space formed by the first case member and the second case member, the first case member and the second case member having a seal holding portion for holding the seal member, the seal holding portion having: a first recess portion formed at an intermediate position of the first fixing portion and the second fixing portion; and a second recess portion formed at an intermediate position of the third fixing portion and the fourth fixing portion.
Effects of the invention
According to the present invention, an electronic control device with high waterproof reliability at low cost can be provided.
Drawings
Fig. 1 is a perspective view showing an outline of an electronic control device.
Fig. 2 is an exploded perspective view showing an outline of the electronic control device.
Fig. 3 is a plan view of the electronic control device.
Fig. 4 is a schematic sectional view taken along line IV-IV of fig. 3, showing a sectional structure of the sealing part.
Fig. 5 is a diagram illustrating expansion deformation of the case when the internal pressure of the case becomes higher with respect to the outside.
Fig. 6 is a schematic cross-sectional plan view illustrating the shape of a seal portion of the electronic control device according to embodiment 1.
Fig. 7 is a schematic cross-sectional plan view showing the shape of a seal portion of the electronic control device according to embodiment 2.
Fig. 8 is a schematic cross-sectional plan view illustrating the shape of a seal portion of an electronic control device according to embodiment 3.
Fig. 9 is a schematic cross-sectional plan view illustrating the shape of a seal portion of an electronic control device according to embodiment 4.
Fig. 10 is a schematic cross-sectional plan view showing the shape of a seal portion of the electronic control device according to embodiment 5.
Fig. 11 is a schematic cross-sectional plan view showing the shape of a seal portion of the electronic control device according to modification 1.
Detailed Description
An electronic control device according to an embodiment of the present invention will be described with reference to the drawings.
< embodiment 1>
Fig. 1 is a perspective view showing an outline of an electronic control device 1 according to embodiment 1 of the present invention, and fig. 2 is an exploded perspective view showing an outline of the electronic control device 1. Fig. 3 is a plan view of the electronic control device 1. The electronic control device 1 according to the present embodiment is an ECU (engine controller unit) that electronically controls an engine of an automobile (hereinafter also referred to as a vehicle), and is mounted in an engine compartment of the vehicle.
As shown in fig. 1 to 3, the electronic control device 1 includes a base 4, an electronic circuit substrate 6 for engine control disposed on the base 4, a connector 2 for electrically connecting the electronic circuit substrate 6 and external devices (various sensors, actuators, and the like), and a cover 3 attached to the base 4 so as to cover the electronic circuit substrate 6.
A casing (housing) 9 of the electronic control device 1 has a base 4 as a first casing member, a lid 3 as a second casing member, and a connector 2 as a third casing member. The electronic circuit board 6 is housed in a space (an inner space of the housing 9) formed by the base 4, the cover 3, and the connector 2. The seal member 5 is mounted between the respective housing members constituting the housing 9. The gaps between the respective case members constituting the case 9 are filled with the seal member 5, whereby the inside of the case 9 is sealed and the waterproofness of the electronic control device 1 is ensured.
The sealing member 5 is formed by applying an adhesive (sealant) and curing it. The adhesive (sealant) is made of a material such as silicon base, epoxy base, or urethane base. The adhesive (sealant) may be an ultraviolet-curable adhesive which is cured by ultraviolet rays, or a moisture-curable adhesive which is cured by reaction with moisture in the air. Fig. 2 illustrates the sealing member 5 after the adhesive (sealant) is cured.
The connector 2 is made of resin such as PBT (polybutylene terephthalate), PA (polyamide), PPS (polyphenylene sulfide). In the connector 2, a terminal member (not shown) electrically connected to the electronic circuit substrate 6 is insert-molded. The terminal member is formed of a metal containing copper as a main component.
The terminal member of the connector 2 has an external terminal portion connected to a wire harness (not shown) outside the housing 9, and an internal terminal portion connected to the electronic circuit board 6 inside the housing 9. The internal terminal portion of the connector 2 is connected to the electronic circuit board 6 by solder, press-fit, or the like.
As shown in fig. 2, the connector 2 includes a plurality of cylindrical portions 21 in a rectangular cylindrical shape fitted to a connection end portion of the wire harness, and a trapezoidal plate-shaped holding plate 22 formed integrally with the plurality of cylindrical portions 21 and holding each of the cylindrical portions 21. The holding plate 22 has a predetermined thickness, and the outer peripheral portion thereof is in contact with the cover 3 and the base 4 via the sealing member 5. The outer periphery of the trapezoidal plate-shaped holding plate 22 has an upper bottom 22a, a lower bottom 22c, and a pair of legs 22b connecting the upper bottom 22a and the lower bottom 22 c.
The electronic circuit board 6 includes a flat plate-shaped insulating substrate made of an insulating material; and electronic components (not shown) including capacitors, coils, transistors, semiconductor ICs, and the like mounted on the insulating substrate. A wiring pattern for electrically connecting the internal terminal portion of the connector 2 and the electronic component is formed on the insulating substrate.
The cover 3 is made of resin such as PBT (polybutylene terephthalate), PPS (polyphenylene sulfide), and PA (nylon). The base 4 is formed of a metal containing aluminum, iron, or the like as a main component.
The base 4 includes a bottom plate 40 having a rectangular flat plate shape, a seal holding frame 140 serving as a seal holding portion for holding the seal member 5 from below, a plurality of cover fixing pieces 41 serving as fixing portions to which mounting portions 35 of the cover 3 described later are fixed, a plurality of flanges 42 serving as vehicle body mounting portions for mounting to a vehicle body frame, and a plurality of board mounting portions 43 on which the electronic circuit board 6 is mounted.
The seal holding frame 140 is provided on the entire periphery of the outer edge portion of the bottom plate 40. The sealing holding frame 140 has a rectangular frame shape surrounding the electronic circuit substrate 6. The plurality of substrate mounting portions 43 are provided inside a rectangular frame-shaped seal holding frame 140.
The substrate mounting portion 43 protrudes upward from the bottom plate 40 and protrudes sideward from the seal holding frame 140. The electronic circuit substrate 6 is mounted to the base 4 by mounting screws into mounting holes provided in the electronic circuit substrate 6 and screw holes of the substrate mounting portion 43. By inserting grease having good thermal conductivity between the electronic circuit board 6 and the base 4, heat generated by the electronic components of the electronic circuit board 6 can be efficiently transferred to the metal base 4 and released from the base 4 to the outside air.
The plurality of cover fixing pieces 41 are formed to protrude outward from the side of the base 4 at four corners of the base 4. The mounting portion 35 of the cover 3 described later is mounted to the cover fixing piece 41 by "thermal clamping", thereby fixing the cover 3 to the base 4.
A plurality of flanges 42 are provided to protrude outward from the side portion of the base 4. As shown in fig. 3, the flange 42 is mounted to a mounting bracket (exterior member) 90 provided on a vehicle body frame in an engine compartment by bolts (fastening members) 91. In the present embodiment, four flanges 42 are provided on the base 4. Bolts 91 are inserted into bolt insertion holes (through holes) of the respective flanges 42 and bolt insertion holes (through holes) of the mounting bracket 90 of the vehicle body frame, and nuts are mounted on the bolts 91, thereby fixing the base 4 to the vehicle body frame.
Fig. 4 is a schematic sectional view taken along line IV-IV of fig. 3, showing a sectional structure of the sealing part. In fig. 4, the electronic circuit board 6 is not shown. As shown in fig. 2 and 4, the seal holding frame 140 has a pair of side plates (an outer side plate 149 and an inner side plate 148) formed along an outer edge of the bottom plate 40, and a bottom portion 147 connecting the pair of side plates to each other. Outer side plate 149 and inner side plate 148 are rectangular frame-shaped in plan view, and inner side plate 148 is formed inside outer side plate 149. That is, the outside side plate 149 is formed to surround the inside side plate 148. As shown in fig. 4, in the seal holding frame 140, a recess (hereinafter referred to as a seal holding recess) 145 having a rectangular cross section is formed by an outer peripheral surface of a rectangular frame-shaped inside side plate 148, an inner peripheral surface of a rectangular frame-shaped outside side plate 149, and a bottom portion 147 between the outside side plate 149 and the inside side plate 148.
As shown in fig. 1 and 2, the lid portion 3 has a top plate 31 having a rectangular flat plate shape and 4 side plates 32 extending downward from each side of the top plate 31, and has a rectangular box shape with a lower opening. A connector mounting portion 34 to which the connector 2 is mounted is formed on one side plate 32. The connector mounting portion 34 is formed to assume a trapezoidal shape corresponding to the upper bottom portion 22a and the pair of leg portions 22b of the holding plate 22 of the connector 2, and a gap between the inner surface of the connector mounting portion 34 and the upper bottom portion 22a and the pair of leg portions 22b of the holding plate 22 of the connector 2 is blocked by the sealing member 5.
As shown in fig. 4, a seal holding end portion 130 is formed at the lower end portion of the remaining three side plates 32 of the cover portion 3, the seal holding end portion 130 being a seal holding portion that holds the sealing member 5 from the upper side. The seal holding end 130 includes a convex portion (hereinafter, referred to as a seal holding convex portion) 135 disposed in the seal holding concave portion 145 of the seal holding frame 140 of the base 4 and a rib portion 134 provided to protrude to the outside of the electronic control device 1. The seal-retaining end 130 is formed on the three side plates 32 so as to be substantially U-shaped in plan view (bottom view). In the present embodiment, the thickness of the seal holding projection 135 is the same as the thickness of the side plate 32 above the rib 134.
As shown in fig. 4, the gap between the seal holding recess 145 of the base 4 and the seal holding projection 135 of the lid 3 disposed in the seal holding recess 145 is filled with the sealing member 5. In the present embodiment, as shown in fig. 2, the seal holding end 130 of the cover portion 3 is arranged at three sides of the rectangular frame-shaped seal holding frame 140, and the gap between the seal holding frame 140 and the seal holding end 130 is filled with the sealing member 5. The lower bottom portion 22c of the holding plate 22 of the connector 2 is disposed at a portion of the remaining one side of the sealing and holding frame 140, and a gap between the sealing and holding frame 140 and the lower bottom portion 22c of the holding plate 22 is filled with the sealing member 5.
The mounting portions 35 mounted on the cover fixing pieces 41 are formed at four corners of the lower end portion of the cover 3, and the cover fixing pieces 41 are provided at the four corners of the base 4. The attachment portion 35 has an abutment surface 36 that abuts the upper surface of the cover fixing piece 41, and a cylindrical protrusion 37 that protrudes downward from the abutment surface 36.
The protruding portion 37 of the attachment portion 35 is inserted into the through hole of the cover fixing piece 41, and the tip end portion of the protruding portion 37 is heated and pressed while the abutment surface 36 of the attachment portion 35 is in abutment with the upper surface of the cover fixing piece 41. Thus, a clamp portion 37a that is radially outwardly expanded from the base end portion of the projection portion 37 is formed at the tip end portion of the projection portion 37, and the cover fixing piece 41 is sandwiched between the clamp portion 37a and the abutment surface 36 of the attachment portion 35. As a result, the mounting portion 35 is fixed to the cover fixing piece 41, and the cover 3 is mounted to the base 4.
In the present embodiment, the attachment portion 35 having the clamp portion 37a and the cover fixing piece 41 fix the cover 3 and the base 4 to each other. A point on the central axis of the clamping portion 37a of the cover fixing piece 41 (the central axis of the protrusion portion 37) is also marked as a fixing point. That is, in the present embodiment, the cover 3 and the base 4 are fixed to each other at fixing points at four corners. Fig. 2 shows the clamped protrusion 37.
An example of an assembling method of the electronic control device 1 according to the present embodiment will be described. First, the terminal members of the connector 2 and the electronic circuit board 6 are electrically and mechanically connected. Next, an adhesive (sealant) is injected (applied) into the seal holding recess 145 of the seal holding frame 140 using an injection device (not shown) such as a dispenser.
Next, the electronic circuit board 6 is mounted on the board mounting portion 43 of the base 4, and the lower bottom portion 22c of the holding plate 22 of the connector 2 is mounted on the sealing holding frame 140. The electronic circuit substrate 6 is mounted to the base 4 by screw-fastening the electronic circuit substrate 6 to the substrate mounting portion 43. Next, an adhesive (sealant) is injected (applied) into the concave portion formed in the upper bottom portion 22a of the connector 2 using an injection device.
Next, the seal holding convex portion 135 of the seal holding end portion 130 of the cover 3 is inserted into the seal holding concave portion 145 of the seal holding frame 140 of the base 4. The mounting portion 35 of the cover 3 is mounted on the cover fixing piece 41 of the base 4 while the sealant is pressed by the seal holding end portion 130 of the cover 3. When the cover portion 3 is positioned toward the base 4, the connector mounting portion 34 is positioned close to the upper bottom portion 22a and the leg portion 22b of the connector 2, and therefore, the sealant is pressed by the connector mounting portion 34, and the sealant fills the gap between the connector mounting portion 34 and the holding plate 22.
The mounting portion 35 is fixed to the cover fixing piece 41 by "thermal clamping" that forms the clamping portion 37a by inserting the protrusion portion 37 provided on the mounting portion 35 into the insertion hole provided on the cover fixing piece 41 and pressing while heating the tip end portion of the protrusion portion 37. Thereby, the cover 3 and the base 4 are fixed to each other by fixing points at four corners.
As time passes, the adhesive (sealant) is cured in a state in which the respective members constituting the housing 9 are bonded to each other, the sealing member 5 filling the gap between the respective members is formed, and the electronic control device 1 is completed. The electronic control device 1 formed in this way has a sealing structure (waterproof structure) in which gaps between the respective case members constituting the case 9 are sealed by the sealing member 5.
In the electronic control unit having the waterproof specification, since the inside of the case 9 is sealed, stress is generated in the sealing portion 7 when a difference in pressure between the inside and the outside of the case 9 is generated due to a temperature change. The seal portion 7 refers to the seal member 5 and a peripheral portion of the seal member 5 for holding the seal member 5. That is, in the present embodiment, the sealing portion 7 is constituted by the sealing member 5, the seal holding frame 140 of the base 4 that holds the sealing member 5 from the lower side, and the seal holding end portion 130 of the lid portion 3 that holds the sealing member 5 from the upper side.
In the structure in which the cover 3 and the base 4 are fixed at the fixing points at the four corners, in the case where the seal portion 7 is formed as a rectangular frame composed of four sides that are straight in plan view, if the internal pressure of the case 9 becomes high with respect to the outside, the highest bending stress is generated at the intermediate position between the fixing points.
Fig. 5 is a diagram illustrating the expansion deformation of the case 9 when the internal pressure of the case 9 becomes higher than the outside, and fig. 5 schematically shows a cross section obtained by cutting one side plate 32 along the side plate 32. Fig. 5 shows an electronic control device according to a comparative example of the present embodiment, and the seal portion 7 is not provided with the later-described recessed portions (171, 172).
As shown in fig. 5, when the internal pressure of the case 9 increases, the lid 3 deforms so that the left and right center portions as shown expand upward most, and the base 4 deforms so that the left and right center portions as shown expand downward most. When the cover 3 and the base 4 are deformed to be separated from each other, stress is generated in the sealing member 5 bonded to the two members.
If the stress of the sealing member 5 exceeds a predetermined value, the sealing member 5 peels off from the cover 3 and the base 4, and the sealing property of the case 9 may be reduced. Although the joint strength between the lid 3 and the base 4 can be improved and the sealing property (water resistance) can be ensured by increasing the amount of the injected sealant (amount of coating) or increasing the fixing points, the increase in the amount of the injected sealant (amount of coating) and the increase in the fixing points may lead to an increase in material cost and manufacturing man-hours.
Therefore, in the present embodiment, the recessed portions (the first recessed portion 171 and the second recessed portion 172) are formed at predetermined positions of the rectangular frame-shaped sealing portion 7, and the rigidity of the sealing portion 7 is increased, whereby the amount of the sealant to be injected (the amount of the sealant to be applied) is suppressed, and the waterproof reliability is improved. The shape of the seal portion 7 in the electronic control device 1 according to the present embodiment will be described in detail below.
Fig. 6 is a schematic sectional plan view showing the shape of the sealing portion 7 of the electronic control device 1 according to embodiment 1 of the present invention, and shows a section taken along line VI-VI in fig. 4. For convenience of explanation, as shown in the drawing, the side on which the connector 2 is provided is referred to as the front side of the electronic control device 1, the opposite side is referred to as the rear side of the electronic control device 1, and the direction orthogonal to the front-rear direction and the height direction (vertical direction) of the electronic control device 1 is referred to as the left-right direction.
As described above, the first to fourth cover fixing pieces 41a to 41d (41) are provided at the four corners of the base 4 as a plurality of fixing portions to be fixed to the cover 3. The first lid fixing piece 41a protrudes forward from the left front end portion of the base 4. The second cover fixing piece 41b protrudes rearward from the left rear end of the base 4. The third cover fixing piece 41c protrudes forward from the right front end portion of the base 4. The fourth cover fixing piece 41d protrudes rearward from the rear right end of the base 4.
As shown in fig. 6, a straight line connecting the intermediate position of the first cover fixing piece 41a and the second cover fixing piece 41b and the intermediate position of the third cover fixing piece 41c and the fourth cover fixing piece 41d is defined as a first base center axis Ca1. The first base central axis Ca1 is a central axis of the base 4, and bisects the width of the base 4 in the front-rear direction. Further, a straight line connecting the intermediate position of the first cover fixing piece 41a and the third cover fixing piece 41c and the intermediate position of the second cover fixing piece 41b and the fourth cover fixing piece 41d is defined as a second base center axis Ca2. The second susceptor center axis Ca2 is a center axis of the susceptor 4, and bisects the width of the susceptor 4 in the left-right direction. The intersection of the first susceptor center axis Ca1 and the second susceptor center axis Ca2 is defined as the center point O of the susceptor 4.
The base 4 is provided with four flanges 42 attached to the vehicle body frame. Two flanges 42 (marked as central flanges 42 a) of the four flanges 42 are provided so as to protrude toward the left and right outer sides of the base 4 on the first base central axis Ca1.
The seal holding frame 140 includes a left side frame structure portion 140a, a right side frame structure portion 140b, a front side frame structure portion 140c, and a rear side frame structure portion 140d. The left side frame structure portion 140a is formed in a substantially linear shape so as to follow a straight line connecting the first cover fixing piece 41a and the second cover fixing piece 41 b. The right side frame structure portion 140b is formed in a substantially straight line along a straight line connecting the third cover fixing piece 41c and the fourth cover fixing piece 41 d. The front frame structural portion 140c is formed linearly so as to connect the front end of the left side frame structural portion 140a and the front end of the right side frame structural portion 140 b. The rear frame structural portion 140d is formed linearly so as to connect the rear end of the left frame structural portion 140a and the rear end of the right frame structural portion 140 b.
The left side frame structure portion 140a has a first recess 141 recessed toward the center point O side (right side in the drawing) of the base 4. The right frame structure portion 140b has a second recessed portion 142 recessed toward the center point O side (left side in the figure) of the base 4. The first and second recessed portions 141 and 142 have a circular arc shape in plan view. The first recessed portion 141 and the second recessed portion 142 are formed in an arc shape centering on the center axis of the bolt insertion hole (through hole) of the center flange 42a, for example. Since the rectangular frame-shaped sealing and holding frame 140 is provided with the recessed portions 141 and 142 recessed toward the inside of the electronic control device 1, the arc-shaped recesses corresponding to the recessed portions 141 and 142 are also formed in the outer shape of the electronic circuit board 6 housed inside the sealing and holding frame 140 (see fig. 2).
One of the pair of center flanges 42a is provided to protrude from a side portion of the first recess 141 of the base 4 toward a direction opposite to the recess direction of the first recess 141. The other of the pair of center flanges 42a is provided to protrude from the side of the second recess 142 of the base 4 toward the direction opposite to the recess direction of the second recess 142.
The seal holding end portion 130 of the cover portion 3 has a left holding end portion 136 having a seal holding convex portion 135 arranged in the seal holding concave portion 145 of the left side frame structure portion 140 a; a right holding end 137 having a seal-holding convex portion 135 disposed in the seal-holding concave portion 145 of the right side frame structural portion 140 b; and a rear holding end 139 having a seal-holding convex portion 135 disposed in the seal-holding concave portion 145 of the rear side frame structural portion 140d. A first recessed portion 131 is formed in the left holding end portion 136, and the first recessed portion 131 has a seal holding convex portion 135 disposed in a seal holding concave portion 145 of a first recessed portion 141. A second recessed portion 132 is formed in the right holding end portion 137, and the second recessed portion 132 has a seal holding convex portion 135 disposed in a seal holding concave portion 145 of a second recessed portion 142. The first and second recessed portions 131 and 132 are formed in a circular arc shape in a plan view.
As described above, when the adhesive (sealant) is injected into the seal holding recess 145 of the seal holding frame 140 and cured in a state where the cover portion 3 and the connector 2 are positioned, the rectangular frame-shaped sealing member 5 is formed. The seal member 5 has a plurality of linear portions and a plurality of recessed portions, similarly to the shape of the seal holding recess 145 of the base 4. That is, the seal member 5 has a first recessed portion 151 disposed in the seal holding recessed portion 145 of the first recessed portion 141, and a second recessed portion 152 disposed in the seal holding recessed portion 145 of the second recessed portion 142. The first recessed portion 151 and the second recessed portion 152 are formed in an arc shape recessed toward the inside of the rectangular frame-shaped sealing member 5.
The first recessed portions 151, 141, 131 of the seal member 5, the seal holding frame 140, and the seal holding end portion 130 are formed at intermediate positions of the fixing point of the first cover fixing piece 41a and the fixing point of the second cover fixing piece 41 b. The sealing member 5, the seal holding frame 140, and the second recessed portions 152, 142, 132 of the seal holding end portion 130 are formed at intermediate positions of the fixing point of the third cover fixing sheet 41c and the fixing point of the fourth cover fixing sheet 41 d.
The first recesses 151, 141, 131 are provided so that the bottom portions thereof (the portions closest to the second base center axis Ca 2) overlap with intermediate positions between the fixing points of the first cover fixing pieces 41a and the fixing points of the second cover fixing pieces 41b when viewed from the direction of the first base center axis Ca1. The second recesses 152, 142, 132 are provided so that the bottom portions (the portions closest to the second base center axis Ca 2) thereof overlap with the intermediate positions of the fixing points of the third cover fixing piece 41c and the fourth cover fixing piece 41d when viewed from the direction of the first base center axis Ca1. In the present embodiment, the first concave portions 151, 141, 131 and the second concave portions 152, 142, 132 are formed such that the center points of the first concave portions 151, 141, 131 of the circular arc shape and the center points of the second concave portions 152, 142, 132 of the circular arc shape are located on the first base center axis Ca1.
The first recessed portions 151, 141, and 131 and the second recessed portions 152, 142, and 132 are formed in a line-symmetrical shape (left-right symmetrical shape in fig. 6) with respect to a straight line (the second base center axis Ca 2) connecting an intermediate position between a fixing point of the first cover fixing piece 41a and a fixing point of the third cover fixing piece 41c and an intermediate position between a fixing point of the second cover fixing piece 41b and a fixing point of the fourth cover fixing piece 41 d.
The sealing section 7 has a first sealing section 71 provided between the first lid fixing piece 41a and the second lid fixing piece 41 b; a second sealing portion 72 provided between the third cover fixing piece 41c and the fourth cover fixing piece 41 d; a third sealing portion 73 provided between the first cover fixing piece 41a and the third cover fixing piece 41 c; and a fourth sealing portion 74 provided between the second cover fixing piece 41b and the fourth cover fixing piece 41 d.
The first seal portion 71, the second seal portion 72, and the fourth seal portion 74 are constituted by a seal holding frame 140 of the base 4, the seal member 5 inside the seal holding frame 140, and a seal holding end portion 130 of the lid portion 3 for pressing the seal member 5 toward the base 4. The third sealing portion 73 is constituted by the seal holding frame 140 of the base 4, the sealing member 5 in the seal holding frame 140, and the lower bottom portion 22c (see fig. 2) of the holding plate 22 of the connector 2 for pressing the sealing member 5 toward the base 4.
The first seal portion 71 is provided with a linear portion 71a and a first recessed portion 171 recessed toward the center point O side of the base 4 with respect to the linear portion 71a, and the second seal portion 72 is provided with a linear portion 72a and a second recessed portion 172 recessed toward the center point O side of the base 4 with respect to the linear portion 72 a. Thus, in the present embodiment, when the internal pressure fluctuates in the electronic control device 1, the first recessed portion 171 and the second recessed portion 172 are formed at positions where the maximum bending stress is generated in the first seal portion 71 and the second seal portion 72 (positions where the deformation amount is maximum).
By forming the first recess 171 and the second recess 172, the second moment of area of the seal portion 7 can be increased as compared with the case where the first recess 171 and the second recess 172 are not formed. That is, the bending rigidity of the seal portion 7 can be improved, and the deformation of the seal portion 7 can be suppressed. In the present embodiment, by forming the first recessed portion 171 and the second recessed portion 172, the bonding area between the sealing member 5 and the base 4 and the bonding area between the sealing member 5 and the cover 3 can be increased, and the bonding strength can be improved, as compared with the case where the first recessed portion 171 and the second recessed portion 172 are not formed.
Thereby, for example, in the case where the internal pressure of the housing 9 rises and a force acts to separate the cover 3 and the base 4 from each other, the deformation of the seal portion 7 in the cover 3 and the base 4 is suppressed, and thus the stress generated in the seal member 5 bonded to the cover 3 and the base 4 is reduced. That is, according to the present embodiment, peeling between the sealing member 5 and the cover 3 and the base 4 can be effectively prevented. That is, the sealing strength in the sealing portion 7 can be improved. According to this structure, the waterproof reliability can be improved while suppressing the amount of the sealant to be applied.
In the present embodiment, as shown in fig. 1 and 2, the connector 2 is sandwiched between the first cover fixing piece 41a and the third cover fixing piece 41c by the base 4 and the cover 3 via the sealing member 5. Thus, in the present embodiment, one side portion of the rectangular parallelepiped case 9 is constituted by the side plate 32 and the connector 2. This improves the rigidity of the side portion of the housing 9 between the first cover fixing piece 41a and the third cover fixing piece 41c as compared with the other side portions, and can effectively suppress deformation when the internal pressure of the housing 9 fluctuates. Further, the upper bottom portion 22a and the pair of leg portions 22b in the trapezoidal holding plate 22 of the connector 2 and the connector mounting portion 34 are bonded to the sealing member 5. This improves the bonding strength between the connector 2 and the cover 3.
As shown in fig. 4, a rib 134 protruding laterally (in the direction outside the electronic control device 1) from the side surface of the side plate 32 is formed in the seal holding end 130 of the cover portion 3. As shown in fig. 3, the rib 134 is provided continuously to the left side plate 32, the rear side plate 32, and the right side plate 32, and has a U-shape in plan view. As shown in fig. 4, the rib 134 has a square cross section and includes a lower side 134a, an upper side 134b, and a front end 134c connecting the lower side 134a and the upper side 134 b. When the cover 3 is viewed from above, the front end surface 134c of the rib 134 constitutes an end surface (outer end surface) located on the outermost side of the cover 3.
The lower side 134a of the rib 134 is located above the upper end surface of the outer side plate 149 of the base 4. The front end surface 134c of the rib 134 is positioned inside (on the left side in the figure) the outer peripheral side surface 149a of the outer side plate 149 of the base 4. In the assembly process of the electronic control device 1, when the seal holding convex portion 135 of the lid portion 3 is fitted into the seal holding concave portion 145 of the base 4, the sealing agent is pressed by the seal holding end portion 130. At this time, the sealant is not only pressed by the tip end surface (lower end surface) of the seal holding convex portion 135 but also pressed from above to below by the lower side surface 134a of the rib portion 134, and therefore, the sealant can be appropriately pressed into the inside of the lid portion 3. That is, by providing the rib 134 for pressing the sealing member 5 toward the bottom 147 of the seal holding recess 145, the filling property of the sealant with respect to the gap between the seal holding recess 145 and the seal holding projection 135 can be improved.
In the present embodiment, the outer end surface of the lid 3 (the front end surface 134c of the rib 134) is positioned inside (on the left side in the drawing) the outer end surface of the base 4 (the outer peripheral side surface 149a of the outer side plate 149), and a portion above the seal holding recess 145 is opened. Therefore, in the assembly process of the electronic control device 1, whether or not the sealant is properly filled in the gap between the seal holding concave portion 145 and the seal holding convex portion 135 can be easily confirmed from the upper side of the electronic control device 1. That is, according to the present embodiment, the assembling workability of the electronic control device 1 can be improved.
When the temperature of the electronic control device 1 rises and the sealing member 5 thermally expands, the sealing member 5 in the seal holding recess 145 can escape upward along the side plate 32 of the cover portion 3. Therefore, sealing member 5 protrudes from seal holding recess 145 so as to contact a part (lower part) of the outer end surface (front end surface 134c of rib 134) of lid 3 formed inside the outer end surface (outer peripheral side surface 149a of outer side plate 149) of base 4. That is, in the present embodiment, the deformation of the sealing member 5 due to thermal expansion is allowed by opening the upper side of the seal holding recess 145, and therefore, the stress generated in the sealing member 5 can be relaxed.
However, assuming that the front end face 134c of the rib 134 of the cover 3 is flush with the outer peripheral side face 149a of the outside side plate 149 of the base 4, the sealing member 5 may cause the outer shape to become large by protruding in the lateral direction. In addition, when the center flange 42a is mounted to the vehicle body frame, a tool for mounting the bolt 91 inserted into the bolt insertion hole of the center flange 42a may interfere with the protruding portion of the seal member 5, etc., possibly causing an obstacle to the mounting work.
In contrast, in the present embodiment, as described above, the outer end surface of lid 3 (the front end surface 134c of rib 134) of first recessed portion 131 and second recessed portion 132 is positioned inside (on the left side in the drawing) the outer end surface of base 4 (outer peripheral side surface 149a of outer side plate 149), and a portion above seal holding recess 145 is opened. Thus, there is no fear that the protruding portion of the seal member 5 interferes with a tool for mounting the bolt 91 inserted into the bolt insertion hole of the center flange 42 a. That is, according to the present embodiment, the center flange 42a provided on the side of the first recessed portion 131 and the second recessed portion 132 can be easily attached to the mounting bracket 90 of the vehicle body frame.
According to the above embodiment, the following operational effects are exhibited.
(1) The electronic control device 1 includes a base (first case member) 4 having a plurality of cover fixing pieces (fixing portions) 41; a cover (second case member) 3 fixed by the base 4 and a plurality of cover fixing pieces 41; a sealing member 5 provided to fill a gap between the base 4 and the cover 3; and an electronic circuit board (substrate) 6 housed in a space formed by the base 4 and the lid 3. The base 4 has a seal holding frame (seal holding portion) 140 that holds the seal member 5 from one side. The cover portion 3 has a seal holding end portion (seal holding portion) 130 that holds the seal member 5 from the other side. The seal holding frame 140 has a first recessed portion 141 formed at an intermediate position between the first cover fixing piece (first fixing portion) 41a and the second cover fixing piece (second fixing portion) 41 b; and a second recess 142 formed in the third cover fixing piece (third fixing portion) 41c and the fourth cover fixing piece 41d (fourth fixing portion). The seal holding end portion 130 has a first recess 131, the first recess 131 being formed at an intermediate position between the first lid fixing piece (first fixing portion) 41a and the second lid fixing piece (second fixing portion) 41 b; and a second recess 132, the second recess 132 being formed at an intermediate position between the third cover fixing piece (third fixing portion) 41c and the fourth cover fixing piece (fourth fixing portion) 41 d.
With this structure, the rigidity of the seal portion 7 (the seal member 5 and the seal holding portion that holds the seal member 5) can be improved. Therefore, deformation of the housing 9 when the differential pressure between the inside and the outside is generated in the electronic control device 1 can be suppressed, and the stress generated in the seal member 5 can be suppressed to be low. That is, according to the present embodiment, it is possible to provide the electronic control device 1 which is low in cost and high in waterproof reliability while suppressing the amount of application of the sealant for forming the sealing member 5.
(2) The first recesses 141, 131 are provided so that the bottom portions thereof overlap with the intermediate positions of the first cover fixing piece 41a and the second cover fixing piece 41 b. The second recesses 142, 132 are provided so that the bottom portions thereof overlap with intermediate positions of the third cover fixing piece 41c and the fourth cover fixing piece 41 d. By providing the recessed portions 141, 142, 131, 132 at positions farthest from the fixed points, deformation of the seal portion 7 can be effectively suppressed in the case where a difference in internal and external pressures of the electronic control device 1 occurs.
(3) The electronic control device 1 includes a connector 2 connected to an electronic circuit substrate 6. The connector 2 is sandwiched between the first cover fixing piece 41a and the third cover fixing piece 41c by the base 4 and the cover 3 via the seal member 5. The rigidity of the side portion of the housing 9 of the electronic control device 1 is improved by the connector 2, so that deformation of this portion can be effectively suppressed, and the stress generated in the sealing member 5 in the gap between the connector 2 and the base 4 and the sealing member 5 in the gap between the connector 2 and the cover 3 can be reduced.
(4) A plurality of cover fixing pieces 41 (41 a, 41b, 41c, 41 d) are formed in four corners of the base 4. Thus, in the configuration in which the stress generated in the sealing member 5 can be effectively reduced, the arrangement space of the electronic circuit board 6 can be increased, and the number of the cover fixing pieces 41 can be suppressed to be low, whereby the cost can be reduced.
(5) The first recessed portions 141, 131 and the second recessed portions 142, 132 are formed in a symmetrical shape (a bilaterally symmetrical shape in fig. 6) with respect to a straight line connecting the intermediate positions of the first lid fixing piece 41a and the third lid fixing piece 41c and the intermediate positions of the second lid fixing piece 41b and the fourth lid fixing piece 41 d. Accordingly, when the internal/external pressure difference is generated in the electronic control device 1, the occurrence of distortion in the seal portion 7 can be prevented, and the variation in stress can be effectively prevented.
(6) The base 4 has a plurality of flanges 42 mounted to a mounting bracket (outer member) 90. The first recessed portion 141 is formed so as to be recessed toward one side (rightward in fig. 6, i.e., the inside direction of the electronic control device 1), and the second recessed portion 142 is formed so as to be recessed toward the other side (leftward in fig. 6, i.e., the inside direction of the electronic control device 1). One of the pair of central flanges 42a is provided to protrude from a side portion of the first recess portion 141 of the base 4 toward a direction opposite to the recess direction of the first recess portion 141 (leftward in fig. 6, i.e., an outer direction of the electronic control device 1). The other of the pair of center flanges 42a is provided to protrude from the side portion of the second recessed portion 142 of the base 4 toward the direction opposite to the recessed direction of the second recessed portion 142 (rightward in fig. 6, i.e., the outside direction of the electronic control device 1).
In this configuration, since the recessed portions 141 and 142 are recessed toward the inside of the electronic control device 1, the workability of attaching the center flange 42a on the side thereof to the mounting bracket 90 can be improved. Further, since the recessed portions 141 and 142 are formed in the arc shape, it is possible to suppress a reduction in the volume inside the housing 9 due to the provision of the recessed portions 141 and 142 to a minimum, and to improve the workability of attaching the center flange 42a to the attachment bracket 90. Further, the seal portion 7 (the first recessed portion 171 and the second recessed portion 172) around the center flange 42a can be reinforced against vibration, impact, and the like input from the vehicle. This can greatly shift the resonance point of the electronic control device 1, and thus can improve vibration resistance and shock resistance.
(7) The outer end surface of the first recess 131 of the cover 3 (the front end surface 134c of the rib 134) is located inside the outer end surface of the first recess 141 of the base 4 (the outer peripheral side surface 149a of the outer side plate 149). Similarly, the outer end surface of the second recess 132 of the lid 3 (the front end surface 134c of the rib 134) is located inside the outer end surface of the second recess 142 of the base 4 (the outer peripheral side surface 149a of the outer side plate 149). This prevents the seal member 5 from protruding outside the outer end surface of the base 4, and therefore prevents interference between the seal member 5 and the bolt attachment tool. Therefore, the center flange 42a provided on the side of the first recessed portion 141 and the second recessed portion 142 can be easily attached to the mounting bracket 90 of the vehicle body frame.
(8) The seal holding frame (seal holding portion) 140 of the base 4 has a seal holding concave portion (concave portion) 145, and the seal holding end portion (seal holding portion) 130 of the lid portion 3 has a seal holding convex portion (convex portion) 135. The sealing member 5 is provided to fill the gap between the seal holding recessed portion 145 and the seal holding projected portion 135 disposed in the seal holding recessed portion 145. Further, sealing member 5 protrudes from seal holding recess 145 so as to be in contact with a portion of the outer end surface (front end surface 134c of rib 134) of lid 3 formed inside the outer end surface (outer peripheral side surface 149a of outer side plate 149) of base 4. Therefore, in the assembly process of the electronic control device 1, whether or not the sealant is properly filled in the gap between the seal holding concave portion 145 and the seal holding convex portion 135 can be easily confirmed from the upper side of the electronic control device 1. That is, according to the present embodiment, the assembling workability of the electronic control device 1 can be improved.
(9) The seal holding end portion 130 of the cap portion 3 has a rib 134, and the rib 134 is used to press the sealing member 5 toward the bottom 147 of the seal holding recess 145. The rib 134 is provided to protrude toward the outside direction of the electronic control device 1. In this configuration, since the sealant is pressed downward from above by the rib 134 in the assembly process of the electronic control device 1, the sealant can be appropriately pressed into the inside of the lid portion 3. That is, the filling property of the sealant into the gap between the seal holding concave portion 145 and the seal holding convex portion 135 can be improved. As a result, the gap between the seal holding concave portion 145 and the seal holding convex portion 135 is appropriately filled with the sealing member 5, and therefore, the waterproof reliability can be further improved as compared with the case where the rib portion 134 is not provided.
< embodiment 2>
An electronic control device 1B according to embodiment 2 of the present invention will be described with reference to fig. 7. In the drawings, the same or corresponding portions as those in embodiment 1 are denoted by the same reference numerals, and the differences will be mainly described. Fig. 7 is a schematic cross-sectional plan view showing the shape of a seal portion 7B of an electronic control device 1B according to embodiment 2.
In embodiment 1, the centers of the first concave portions 131, 141, 151, and 171 and the second concave portions 132, 142, 152, and 172 having the circular arc shapes are located on the first base central axis Ca1. In contrast, in embodiment 2, as shown in fig. 7, the centers of the first concave portions 131, 141, 151, and 171 and the second concave portions 132, 142, 152, and 172 having the circular arc shapes are arranged so as to be offset to the rear side (lower side in the drawing) of the first base center axis Ca1.
In embodiment 2, although the centers of the recessed portions 171 and 172 (the intermediate positions of the recessed portions 171 and 172 in the front-rear direction) are arranged to be shifted from the first base center axis Ca1, the recessed portions 171 and 172 are formed on the first base center axis Ca1. Since the recessed portions 171 and 172 are provided on the first base center axis Ca1 that has the largest deformation when the differential pressure between the inside and the outside occurs in the electronic control device 1, the same effect as that of embodiment 1 is obtained.
Although an example in which the recessed portions 171, 172 are formed such that the centers of the recessed portions 171, 172 are located on the rear side of the first base center axis Ca1 is illustrated in fig. 7, the recessed portions 171, 172 may be formed such that the centers of the recessed portions 171, 172 are located on the front side of the first base center axis Ca1. Thus, in embodiment 2, the recessed portions 171 and 172 can be formed so as to be shifted in position back and forth with respect to the first base central axis Ca1. Therefore, according to embodiment 2, the degree of freedom in designing the position of the center flange 42a and the position of the recessed portion of the electronic circuit board 6 recessed along the recessed portion 171 of the sealing portion 7B, which are determined by the vehicle-side conditions, can be increased.
< embodiment 3>
An electronic control device 1C according to embodiment 3 of the present invention will be described with reference to fig. 8. In the drawings, the same or corresponding portions as those in embodiment 1 are denoted by the same reference numerals, and the differences will be mainly described. Fig. 8 is a schematic cross-sectional plan view illustrating the shape of the sealing portion 7C of the electronic control device 1C according to embodiment 3.
As shown in fig. 8, the sealing portion 7C according to embodiment 3 further includes a third recessed portion 173 formed at an intermediate position between the second lid fixing piece 41b (second fixing portion) and the fourth lid fixing piece 41d (fourth fixing portion). The third recess 173 of the sealing portion 7C includes the third recess 143 of the seal holding frame 140, the third recess 133 having the seal holding end 130 of the seal holding convex portion 135 arranged in the seal holding concave portion 145 of the third recess 143, and the third recess 153 of the sealing member 5 disposed in the gap between the seal holding concave portion 145 of the third recess 143 and the seal holding convex portion 135 of the third recess 133.
Thus, embodiment 3 has a configuration in which a third recess 173 is added to the second base central axis Ca2, compared to the electronic control unit 1 of embodiment 1. With this configuration, stress generated in the sealing portion 7C between the second lid fixing piece 41b and the fourth lid fixing piece 41d can be reduced. Therefore, according to embodiment 3, the stress generated in the seal portion 7C can be reduced as compared with embodiment 1.
< embodiment 4>
An electronic control device 1D according to embodiment 4 of the present invention will be described with reference to fig. 9. In the drawings, the same or corresponding portions as those in embodiment 1 are given the same reference numerals, and the differences will be mainly described. Fig. 9 is a schematic cross-sectional plan view illustrating the shape of the sealing portion 7D of the electronic control device 1D according to embodiment 4.
In embodiment 1, the recessed portions 171 and 172 of the seal portion 7 are formed in an arc shape in a plan view. In contrast, in the fourth embodiment, as shown in fig. 9, the recessed portions 171D and 172D are formed in a rectangular shape in a plan view. The first recess 171 and the second recess 172 are bilaterally symmetrical with respect to the second base center axis Ca2.
The first recessed portion 171D has a first linear portion 170a, and the first linear portion 170a is a pair of linear portions protruding from the linear portion 71a of the first seal portion 71 toward the side (rightward in the drawing); and a second linear portion 170b, the second linear portion 170b being a linear portion connecting the pair of first linear portions 170 a. The second recess portion 172 has a pair of first linear portions 170a and a second linear portion 170b connecting the pair of first linear portions 170a to each other, similarly to the first recess portion 171. The first linear portion 170a is formed parallel to the first base center axis Ca1, and the second linear portion 170b is formed parallel to the second base center axis Ca2.
Thus, by forming the recessed portions 171D, 172D in a rectangular shape, the cross-sectional second moment of force of the seal portion 7D becomes larger than that of embodiment 1, and thus the case 9 is more difficult to deform. That is, according to embodiment 4, the stress generated in the seal portion 7D can be further reduced.
< embodiment 5>
An electronic control device 1E according to embodiment 5 of the present invention will be described with reference to fig. 10. In the drawings, the same or corresponding portions as those in embodiment 1 are given the same reference numerals, and the differences will be mainly described. Fig. 10 is a schematic sectional plan view showing the shape of a seal portion 7E of an electronic control device 1E according to embodiment 5.
In embodiment 1, the recessed portions 171 and 172 are formed so as to be recessed toward the inside of the electronic control device 1. In contrast, in embodiment 5, the recessed portions 171E and 172E are formed so as to be recessed in the outer direction of the electronic control device 1. The shapes of the first recess 171E and the second recess 172E have circular arc shapes that are convex toward the outside of the housing 9.
The first recess 171E of the seal portion 7E includes: a first recessed portion 141E of the seal holding frame 140E, a first recessed portion 131E of the seal holding end portion 130E of the seal holding convex portion 135 provided in the seal holding concave portion 145 of the first recessed portion 141E; and a first recessed portion 151E of the sealing member 5 provided in a gap between the seal holding recessed portion 145 of the first recessed portion 141E and the seal holding raised portion 135 of the first recessed portion 131E. The second recessed portion 172E of the sealing portion 7E includes the second recessed portion 142E of the seal holding frame 140E, the second recessed portion 132E having the seal holding end 130E of the seal holding convex portion 135 arranged in the seal holding concave portion 145 of the second recessed portion 142E, and the second recessed portion 152E of the sealing member 5E provided in the gap between the seal holding concave portion 145 of the second recessed portion 142E and the seal holding convex portion 135 of the second recessed portion 132E.
In embodiment 1, the outer shape of the electronic circuit board 6 needs to be recessed according to the shape of the recessed portions 171 and 172. In contrast, in embodiment 5, since the recessed portions 171 and 172 have a shape protruding outward, it is not necessary to recess the electronic circuit board 6. That is, according to embodiment 5, the degree of freedom of wiring of the electronic circuit board 6 is improved and the area where electronic components can be mounted can be increased as compared with embodiment 1.
The following modifications are also within the scope of the present invention, and the configurations shown in the modifications may be combined with the configurations described in the above embodiments, or may be combined with the configurations described in the above different embodiments, or may be combined with the configurations described in the following different modifications.
< modification 1>
In the above embodiment, the example in which one recess is formed in one side of the substantially rectangular frame-shaped sealing portion 7 has been described, but the present invention is not limited to this. That is, the first recess 171 is not limited to being formed by one recess, and may be formed by a plurality of recesses. Similarly, the second recess 172 is not limited to being formed by one recess, and may be formed by a plurality of recesses. For example, as in the electronic control device 1F shown in fig. 11, the first recessed portion 171F may be formed by a plurality of circular-arc-shaped recesses 27, and the second recessed portion 172F may be formed by a plurality of circular-arc-shaped recesses 27. According to this structure, the cross-sectional second moment of force of the seal portions 71, 72 increases, and the adhesion force to the seal holding portion of the seal member 5 (the seal holding frame of the base 4 and the seal holding end portion of the cover portion 3) also increases, so the seal strength can be further increased.
< modification 2>
In the above-described embodiment, as a method of fixing the base 4 and the cover 3, an example of performing "thermal clamping" to fix the resin to the base 4 by thermally deforming the tip of the protrusion 37 of the resin provided on the cover 3 by heating and pressing, has been described, but the present invention is not limited thereto. The mounting portion 35 of the cover 3 and the cover fixing piece 41 of the base 4 may be fixed by screws. In addition, the base 4 and the cover 3 may be fixed by a snap that fits and hooks a convex portion provided on one of the base 4 and the cover 3 into a concave portion provided on the other of the base 4 and the cover 3. According to the fixing method of any one of the thermal clamping, the screw, or the snap, the base 4 and the cover 3 can be easily fixed at a plurality of fixing points.
< modification 3>
In the above embodiment, the example in which the base 4 is formed of metal and the cover 3 is formed of resin has been described, but the present invention is not limited thereto. The cover 3 may be formed of metal, and the base 4 may be formed of resin.
< modification 4>
In the above embodiment, the example in which the cover fixing pieces (fixing portions) 41 are provided at the four corners of the base 4 having a rectangular flat plate shape has been described, but the present invention is not limited thereto. In the case where one side of the base 4 is longer than that of the above embodiment, the cover fixing piece 41 may be further provided.
For example, in the case where the distance between the first cover fixing piece 41a and the second cover fixing piece 41b and the distance between the third cover fixing piece 41c and the fourth cover fixing piece 41d in embodiment 1 are increased by two or more times, the cover fixing pieces may be newly provided at intermediate positions of the first cover fixing piece 41a and the second cover fixing piece 41b and intermediate positions of the third cover fixing piece 41c and the fourth cover fixing piece 41 d. In this case, in the first seal portion 71, recessed portions are provided in intermediate positions of the newly provided cover fixing piece and the first cover fixing piece 41a and in intermediate positions of the newly provided cover fixing piece and the second cover fixing piece 41b, respectively. Further, in the second sealing portion 72, recessed portions are provided in intermediate positions of the newly provided cover fixing piece and the third cover fixing piece 41c and in intermediate positions of the newly provided cover fixing piece and the fourth cover fixing piece 41d, respectively.
Thus, by providing the seal portion 7 at the intermediate position between the adjacent fixing portions among the plurality of fixing portions arranged along the outer periphery of the electronic control device 1 with the recess, the rigidity of the seal portion 7 at the intermediate position between the adjacent fixing portions can be increased, and deformation due to the difference in internal and external pressures of the housing 9 can be suppressed.
< modification 5>
Although the example in which the base 4 is a rectangular flat plate is described in the above embodiment, the present invention is not limited thereto. The base 4 may have a polygonal shape with five or more corner portions.
< modification 6 >
In the above-described embodiment, the electronic control device 1 is described as an example of an ECU that controls an engine, but the present invention is not limited thereto. The present invention can be applied to an electronic control device that controls various devices such as a motor and a solenoid valve. The electronic control device 1 is not limited to controlling a device mounted on a vehicle. The present invention can be applied to an electronic control device for controlling devices mounted on various apparatuses such as a railway vehicle and a construction machine.
Although the embodiments of the present invention have been described above, the above embodiments are merely examples of applications of the present invention, and the technical scope of the present invention is not intended to be limited to the specific configurations of the above embodiments.
Description of the reference symbols
1. 1B, 1C, 1D, 1E, 1F electronic control device, 2 connector, 3 cover (second case member), 4 base (first case member), 5E sealing member, 6 electronic circuit base (base plate), 7B, 7C, 7D, 7E sealing portion, 9 case, 22 holding plate, 22a upper bottom portion, 22B foot portion, 22C lower bottom portion, 32 side plate, 34 connector mounting portion, 35 mounting portion, 41 cover fixing plate (fixing portion), 41a first cover fixing plate (first fixing portion), 41B second cover fixing plate (second fixing portion), 41C third cover fixing plate (third fixing portion), 41D fourth cover fixing plate (fourth fixing portion), 42 flange, 42a central flange, 90 mounting bracket (external member), 91 bolt, 130E sealing holding end portion (sealing holding portion of second case member), 131E, 131E first concave portions (first concave portions of the seal holding portion of the second case member), 132E second concave portions (second concave portions of the seal holding portion of the second case member), 133 third concave portions (third concave portions of the seal holding portion of the second case member), 134 rib portions, 134a lower side surfaces, 134B upper side surfaces, 134C front end surfaces (outer end surfaces of the second case member), 135 seal holding convex portions (convex portions), 140E seal holding frames (seal holding portion of the first case member), 141E first concave portions (first concave portions of the seal holding portion of the first case member), 142E second concave portions (second concave portions of the seal holding portion of the first case member), 143 third recessed portion (third recessed portion of the seal holding portion of the first case member), 145 seal holding recessed portion (recessed portion), 149a outer peripheral side surface (outer side end surface of the first case member), 151E first recessed portion (first recessed portion of the seal member), 152E second recessed portion (second recessed portion of the seal member), 153 third recessed portion (third recessed portion of the seal member), 170a first straight line portion, 170b second straight line portion, 171D, 171E, 171F first recessed portion (first recessed portion of the seal portion), 172D, 172E, 172F second recessed portion (second recessed portion of the seal portion), 173 third recessed portion (third recessed portion of the seal portion), ca1 first base center axis, ca2 second base center axis.

Claims (15)

1. An electronic control device comprising:
a first housing member having a plurality of fixing portions;
a second housing member fixed by the first housing member and the plurality of fixing portions;
a sealing member provided to fill a gap of the first housing member and the second housing member; and
a substrate accommodated in a space formed by the first case member and the second case member, the electronic control device being characterized in that,
the first housing member and the second housing member have a seal holding portion for holding the seal member,
the seal holding portion has:
a first recess portion formed at an intermediate position of the first fixing portion and the second fixing portion; and
a second recess portion formed at an intermediate position of the third fixing portion and the fourth fixing portion.
2. The electronic control device of claim 1,
the first recess portion is disposed such that a bottom thereof overlaps with an intermediate position of the first fixing portion and the second fixing portion,
the second recess portion is provided so that a bottom thereof overlaps with an intermediate position of the third fixing portion and the fourth fixing portion.
3. The electronic control device according to claim 2,
comprising a connector connected to the substrate,
the connector is sandwiched between the first fixing portion and the third fixing portion by the first housing member and the second housing member via the seal member.
4. The electronic control device of claim 3,
the plurality of fixing portions are formed at four corners of the first case member.
5. The electronic control device according to claim 4,
the first and second recessed portions are formed in a symmetrical shape with respect to a straight line connecting intermediate positions of the first and third fixing portions and intermediate positions of the second and fourth fixing portions.
6. The electronic control device of claim 5,
the first housing member has a flange mounted to an external member,
the first recess portion is formed to be recessed toward an inner side direction of the electronic control device,
the flange is provided to protrude from a side portion of the first recess of the first case member toward a direction opposite to a recess direction of the first recess.
7. The electronic control device according to claim 6,
the seal holding portion has a third recessed portion formed at an intermediate position of the second fixing portion and the fourth fixing portion.
8. The electronic control device of claim 6,
the first concave part is in a circular arc shape.
9. The electronic control device according to claim 6,
the first recess is rectangular in shape.
10. The electronic control device according to claim 5,
the first recess portion is formed to be recessed toward an outer side direction of the electronic control device.
11. The electronic control device according to claim 5,
the first recess has a plurality of recesses.
12. The electronic control device of claim 1,
the fixing portion of the first housing member is fixed to the second housing member by any one of thermal clamping, screws, and snaps.
13. The electronic control device according to claim 5,
an outer end surface in the first recess of the second case member is located inside an outer end surface in the first recess of the first case member.
14. The electronic control device of claim 13,
the seal holding portion of the first housing member has a recess,
the seal holding portion of the second housing member has a convex portion,
the clearance is a clearance between the concave portion and the convex portion disposed in the concave portion,
the seal member protrudes from the recess such that the seal member is in contact with a portion of an outer end face of the second housing member formed inside the outer end face of the first housing member.
15. The electronic control device according to claim 14,
the seal holding portion of the second housing member has a rib that presses the seal member toward a bottom of the recess,
the rib portion is provided to protrude toward an outer side direction of the electronic control device,
the seal member protrudes from the recess such that the seal member is in contact with a portion of a front end surface of the rib portion constituting an outer end surface of the second housing member.
CN202180038211.2A 2020-07-31 2021-05-28 Electronic control device Pending CN115804251A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2020130452 2020-07-31
JP2020-130452 2020-07-31
PCT/JP2021/020526 WO2022024539A1 (en) 2020-07-31 2021-05-28 Electronic control device

Publications (1)

Publication Number Publication Date
CN115804251A true CN115804251A (en) 2023-03-14

Family

ID=80035401

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202180038211.2A Pending CN115804251A (en) 2020-07-31 2021-05-28 Electronic control device

Country Status (3)

Country Link
JP (1) JP7411812B2 (en)
CN (1) CN115804251A (en)
WO (1) WO2022024539A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012227217A (en) 2011-04-15 2012-11-15 Hitachi Automotive Systems Ltd Electronic control device
JP2013105766A (en) 2011-11-10 2013-05-30 Mitsubishi Electric Corp Electronic control device
JP5499125B2 (en) * 2012-09-19 2014-05-21 三菱電機株式会社 Housing and method for assembling the housing
JP2014173370A (en) 2013-03-12 2014-09-22 Daido Signal Co Ltd Waterproof construction of outdoor equipment
JP5901725B1 (en) 2014-10-17 2016-04-13 三菱電機株式会社 Waterproof control unit and its assembly method
JP6669038B2 (en) 2016-10-26 2020-03-18 株式会社デンソー Housing member and driving device using the same
US10539236B2 (en) 2017-03-15 2020-01-21 Tower Manufacturing Corporation Gasket retainer for mating an electrical device enclosure

Also Published As

Publication number Publication date
WO2022024539A1 (en) 2022-02-03
JPWO2022024539A1 (en) 2022-02-03
JP7411812B2 (en) 2024-01-11

Similar Documents

Publication Publication Date Title
US7749134B2 (en) Control module
EP2107864B1 (en) Control device
US8929079B2 (en) Electronic control device
US7495183B2 (en) Electronic circuit apparatus
EP1569505B1 (en) Electronic unit casing
US7859852B2 (en) Controller, in particular for motor vehicle transmissions
US8908380B2 (en) Electrical control unit
JP4692432B2 (en) Enclosure for electronic devices
WO2014119379A1 (en) Vehicle-mounted electronic module
JP4353186B2 (en) Electronic equipment
JP6634316B2 (en) Resin-sealed in-vehicle controller
US9468119B2 (en) Housing element for a control device housing used in a motor vehicle
US7724531B2 (en) Control module
US9825381B2 (en) Mounting and connector structure for electronic apparatus
JP5128373B2 (en) Vehicle drive motor unit
JP2009117285A (en) Electronic device for automobile
US20090039494A1 (en) Power semiconductor module with sealing device for sealing to a substrate carrier and method for manufacturing it
WO2019012898A1 (en) Electronic control device and method for manufacturing electronic control device
CN115804251A (en) Electronic control device
JP5556763B2 (en) Electronic control unit
JP2016115871A (en) Electronic apparatus
JP4549406B2 (en) Electronic component mounting structure and in-vehicle sensor
CN103119334B (en) Transmission control device
JP2008059804A (en) Electronic control device
CN112956016A (en) Driver

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination