JP2012023153A - Substrate fitting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a substrate fitting structure which inhibits shaking of a substrate even when relatively heavy components like heavy goods such as a coil and a capacitor are mounted on the substrate.SOLUTION: A substrate 117 is attached to a substrate attachment surface 113a of a filter box 112 by using bolt attachment parts 119. Coil cases 125, 127 with coils respectively attached thereto are attached to the substrate 117 by using fastening parts 137. Lattice-shaped reinforcement ribs 121 are integrally formed with the substrate attachment surface 113a. A first reinforcement rib 147 and second reinforcement ribs 149 respectively corresponding to the central axis M of the coil cases 125, 137 (coil 123) running in a longitudinal direction and the central axes N of the coil cases 125, 137 (coil 123) each running in a crosswise direction have higher heights with their peak faces touching a rear face of the substrate 117.

Description

  The present invention relates to a board mounting structure for mounting a board on which a component is mounted to a housing.

  2. Description of the Related Art Conventionally, there is known a board mounting structure in which a board circuit assembly having a battery charging switching power supply mounted on a board is attached to a heat sink accommodated in a housing so as to cover the board circuit assembly (the following patents) Reference 1).

Noto 3006939 gazette

  By the way, when a relatively heavy component such as a coil or a capacitor is mounted on the board, the board with low rigidity tends to vibrate when receiving vibration input from the outside, which adversely affects the mounted parts and board. Will be affected.

  Accordingly, an object of the present invention is to suppress vibration of the substrate even when a relatively heavy component such as a coil or a capacitor is mounted on the substrate.

  According to the present invention, a reinforcing part is provided on the board mounting surface of the housing so that a surface opposite to the surface on which the component of the board is mounted contacts, and the reinforcing part is set at a position corresponding to an axis passing through the center of gravity of the component. It is characterized by being.

  According to the present invention, since the reinforcing part provided on the board mounting surface of the housing is set at a position corresponding to the axis passing through the center of gravity of the part, the part has substantially the same weight on both sides of the reinforcing part. Thus, the reinforcing portion can efficiently hold the weight of the component. Therefore, when receiving vibration input from the outside, the vibration of the board can be suppressed compared to the case where the weights on both sides of the reinforcing part are different, and the adverse effects on the mounted components and the board can be suppressed. Can do.

It is the perspective view which looked at the vehicle rear part carrying the charging device which concerns on embodiment of this invention from diagonally forward. It is the bottom view which looked at the charging device of FIG. 1 from the bottom. It is a front view which shows the inside of the charger of FIG. It is the front view which extracted and looked at the principal part of the board | substrate of FIG. It is a perspective view which shows the attachment state of a 1st capacitor | condenser. FIG. 6 is a front view of FIG. 5. It is a perspective view which shows the 1st capacitor | condenser mounting plate. It is sectional drawing by the AA line of FIG. It is sectional drawing by the BB line of FIG. It is a perspective view which shows the holding | maintenance state of a 2nd capacitor | condenser. It is a front view of FIG. It is a perspective view which shows the holding stand of FIG. It is a top view which shows the holding stand of FIG. It is a perspective view which shows the 2nd capacitor | condenser mounting plate of FIG. It is sectional drawing by CC line of FIG. It is sectional drawing by the DD line | wire of FIG. It is the perspective view which disassembled the noise filter box, and the lid is omitted. It is a front view of a coil case. It is a side view of a coil case. It is a bottom view of a coil case. It is a front view of the housing | casing of a noise filter box.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In the present embodiment, an electric vehicle will be described as an example of an electric vehicle, but the present invention can be applied to a so-called hybrid vehicle in addition to an electric vehicle.

  As shown in FIG. 1, a charging device 1 according to the present embodiment is disposed at the rear of the vehicle compartment. A pair of left and right wheel houses 3, 3 projecting to the inside of the vehicle is provided on the side of the vehicle body, and these wheel houses 3, 3 are connected to each other along the vehicle width direction by cylindrical mounting bars 5, 5. is doing.

  The charging device 1 includes a charger 7, a side-side mounting plate 11 and a center-side mounting plate 13 that attach the charger 7 to the floor panel 9 of the vehicle body, an external power source used when charging a battery (not shown), And a noise filter 15 for removing noise (conduction noise) generated from the harness.

  The charger 7 includes a charger main body 17 that accommodates a board 47 and the like to be described later, a lid 19 that seals an opening on the vehicle front side of the charger main body 17, and both left and right ends of the charger main body 17. And a handle 21 provided in the vicinity of the lid 19. Further, in the vicinity of the vehicle rear end on both sides in the vehicle width direction of the upper surface 17a of the charger main body 17, a cylindrical mounting portion 23 protrudes upward, and the mounting portion 23 and a mounting bar positioned behind the mounting portion 23 5 brackets 25 are connected via a planar support plate 27 and bolts 29. The support plate 27 is made of an elastic metal. In addition, the upper surface of the attachment part 23 and the upper surface of the bracket 25 of the attachment bar 5 are set to substantially the same height.

  Also, the front and rear end portions of the side portion side mounting plate 11 are formed with recessed mounting portions 31 that are recessed downward, and the mounting portions 31 insert bolts 29 into bolt holes 33 formed in the mounting portion 31 shown in FIG. And fastened to the floor panel 9.

  A mounting portion 35 that is recessed downward is formed in the front portion of the center side mounting plate 13, and the mounting portion 31 is fastened to the floor panel 9 by inserting a bolt 29 into a bolt hole 33 formed in the mounting portion 35. ing. Further, as shown in FIG. 2, the center side mounting plate 13 is grounded by connecting the other end of the ground wire 37 drawn from the noise filter 15, and the ground point P is connected to the mounting portion 35. It is set on the inner side in the vehicle width direction (the side opposite to the charger 7 across the straight line L) with respect to the straight line L passing through the bolt hole 33 and extending in the vehicle longitudinal direction. Although not shown, the noise filter 15 and the charger body 7 are connected by a ground line.

  Thereby, the radiation noise generated from the charger main body 17 can be reliably removed from the ground wire (not shown) through the noise filter 15 and the ground wire 37 connected to the center side mounting plate 13. As a result, it is possible to more reliably remove noise that enters from an external power source (not shown) through the power supply line, and to prevent malfunction of the charging device 1.

  The charger 7 is provided with a cooling unit, and a cooling water inlet 39 for introducing cooling water, a cooling water outlet 41 for discharging cooling water, and an air vent port 43 are provided in the cooling unit.

  As shown in FIG. 3, in the charger main body 17, a first capacitor 45 is disposed at the left end, and a substrate 47 is disposed on the right side of the first capacitor 45.

  As shown in FIGS. 3 and 4, the board 47 has a plurality of attachment portions 49 arranged at the corners, and is attached to the vertical wall surface 51 of the charger main body 17 via these attachment portions 49. A first reinforcing member 53 is attached to the upper left side of the substrate 47, a second reinforcing member 55 is attached to the right side along the vertical direction, and a third reinforcing member 57 is attached to the lower end on the left side along the left and right direction. .

  Each of the reinforcing members 53, 55, 57 is fixed on the substrate 47 by using, for example, an adhesive by appropriately combining plate-like members.

  As shown in FIGS. 3 and 4, the first reinforcing member 53 is provided with a plurality of surrounding portions 58, 59, 60 that are surrounded by a capacitor, and a capacitor is provided inside these surrounding portions 58, 59, 60. 61, various electronic components such as a coil 63, a resistor 65, and a relay are arranged. The second reinforcing member 55 is also provided with a plurality of surrounding portions 68, 69, 70, and 71, and a capacitor 61, a coil 73, a resistor 65, and a diode 75 are provided inside these surrounding portions 68 to 71. Various electronic parts such as are arranged. A second capacitor 77 is attached below the second reinforcing member 55.

  The upper right end portion 55 a of the second reinforcing member 55 is disposed in the vicinity of the attachment portion 49 of the board 47 to the charger main body 17, and the lower end portion 55 b of the second reinforcement member 55 is also disposed in the vicinity of the attachment portion 49. The third reinforcing member 57 has a left end portion 57 a disposed in the vicinity of the attachment portion 49 of the substrate 47, and a right end portion 57 b is also disposed in the vicinity of the attachment portion 49. As described above, the second and third reinforcing members 55 and 57 are arranged so as to extend so as to connect the vicinity of the attachment portion 49 of the substrate 47.

  Here, the board | substrate 47 is normally comprised with resin, such as glass epoxy, and it is easy to vibrate by the vibration input from the outside. For this reason, by providing the reinforcing members 53, 55, and 57 as described above, the surface rigidity of the board 47 is increased, and in particular, vibration of the board 47 due to vibration input to the charging device 1 when the vehicle is traveling can be suppressed. .

  In particular, the reinforcing members 53, 55, 57 are set so as to surround the coils 63, 73, which are heavy objects as electronic components, or are extended to the vicinity of the attachment portion 49, thereby vibrating the substrate 47. Can be suppressed more effectively.

  As shown in FIGS. 5 and 6, the first capacitor 45 is formed in a substantially cylindrical shape, and is sandwiched from above and below by a pair of first capacitor mounting plates 79 and 79 having the same shape. Specifically, as shown in FIGS. 7 to 9, the first capacitor mounting plate 79 includes contact surfaces 81, 81 serving as fastening plates arranged at intervals, and contact surfaces 81, 81, Two band portions 83 and 85 that tie 81 in a semicircular shape are integrally coupled.

  These band portions 83 and 85 are formed by bending an elastically deformable elongated plate-like member, and a convex portion 87 protruding downward (inner circumferential direction) is formed on the top of the band portion 83 on one side. Are formed at two locations, and two convex portions 89 and 89 are formed at the top of the band portion 85 on the other side so as to protrude downward from the convex portion 87 in the circumferential direction. Accordingly, when the first capacitor mounting plate 79 is viewed from above, a total of three convex portions 87, 89, 89 are formed.

  Then, when the pair of first capacitor mounting plates 79, 79 are combined vertically, a band portion 85 having two convex portions 89 is positioned below the band portion 83 having one convex portion 87, and the convex portions 87 are provided. A band portion 83 having one convex portion 87 is positioned below the band portion 85 having two portions 89. Thereby, even in a cross section along the vertical direction, the convex portions 87 and 89 are configured to be arranged at three places in total.

  As described above, when the first capacitor mounting plate 79 is viewed from above, a total of three convex portions 87, 89, 89 are provided, and the convex portions 87, 89 are three in total in the cross section along the vertical direction. There are places. For this reason, the first capacitor 45 is elastically pressed and held by these three convex portions, so that a stable fixed state can be ensured even for capacitors having variations in outer shape.

  The holding state of the second capacitor 77 will be described with reference to FIGS.

  The second capacitor 77 is formed in a substantially cylindrical shape, and is sandwiched between a holding base 91 disposed on the lower side and a second capacitor mounting plate 93 disposed on the upper side. As shown in FIGS. 12 and 13, the holding table 91 has an upper holding surface 95 formed in a concave shape along the outer peripheral surface of the second capacitor 77. Two projections 97 are provided on one end side (right side in FIG. 13) of the concave holding surface 95, and one projection 97 is provided on the other end side (left side in FIG. 13) of the holding surface 95. These protrusions 97 are formed to be elongated so as to extend along the axial direction (left-right direction in FIG. 13) of the second capacitor 77 to be held.

  Further, two substrate attachment portions 99 to be attached to the substrate 47 are formed at the lower end portion on one side (the lower side in FIG. 13) of the outer surface of the holding base 91, and the substrate attachment portion 99 is formed at the lower end portion on the other side. Is formed in one place. One band mounting portion 101 is provided at the upper portion between the two substrate mounting portions 99, and two band mounting portions 101 are provided at the upper portions on both sides of the one substrate mounting portion 99. Yes. Therefore, as shown in FIG. 13, in plan view, a total of three band attachment portions 101 and substrate attachment portions 99 are provided on one side of the outer surface of the holding base 91, and the band attachment portion 101 is also provided on the other side. A total of three board mounting portions 99 are provided.

  As shown in FIG. 11, when the central axis of the second capacitor 77 is C, 2 of the convex portion 110 of the band portion 105 described later on the second capacitor mounting plate 93 and the outer peripheral surface of the second capacitor 77. The central angle θ of the straight line connecting the contact portion and the central axis C is set to 90 ° or less.

  As a result, when the second capacitor mounting plate 93 is attached to the holding base 91, the two convex portions 110 of the band portion 105 move downward along the outer peripheral surface of the second capacitor 77, and the band portion 105 becomes efficient. The second capacitor 77 is stably held by being elastically deformed and expanded.

  Further, as shown in FIGS. 14 to 16, the second capacitor mounting plate 93 connects the contact surfaces 103, 103 serving as fastening surfaces arranged at a distance from each other and the contact surfaces 103, 103. Two band portions 105 and 107 are integrally coupled. These band portions 105 and 107 are formed by bending an elongated plate-like member, and one convex portion 109 protruding downward (inner circumferential direction) is formed on the top of the band portion 107 on one side. The band portion 105 on the other side is formed with two convex portions 110 and 110 that protrude in the downward direction at positions shifted in the circumferential direction with respect to the convex portion 109. Accordingly, when the second capacitor mounting plate 93 is viewed from above, a total of three convex portions 109 and 110 are formed.

  When the second capacitor mounting plate 93 is assembled to the holding base 91, two protrusions 97 of the holding base 91 are located below the band part 107 having one convex part 109, and the convex part 110. It is assumed that one protrusion 109 of the holding base 91 is positioned below the band portion 105 having two. Accordingly, the convex portions 109 and 110 and the protrusions 97 are arranged in a total of three locations in the cross section along the vertical direction.

  As described above, when the second capacitor mounting plate 93 is viewed from above, a total of three convex portions 109 and 110 are provided, and the convex portions 109 and 110 and the protrusion 97 are also total in the cross section along the vertical direction. It has three locations. For this reason, the second capacitor 77 is elastically pressed and held by these three convex portions and protrusions, so that a stable fixed state can be ensured even for capacitors having variations in outer shape.

  As shown in FIG. 17, a filter box 112 as a housing constituting the noise filter 15 is a resin box-like member, and a box main body 112a having an opening on the opposite side to the charger main body 17 shown in FIG. And a lid 112b for sealing the opening of the box body 112a.

  The box main body 112a includes a side wall 113 corresponding to the bottom wall of the box-shaped member to which the substrate 117 is attached, and an outer peripheral wall 115 surrounding the outer periphery of the side wall 113. Bolt mounting portions 119 for fastening the board 117 with bolts are formed at the four corners of the side wall 113, and the board mounting surface 113a on the side of the side wall 113 on which the board 117 is mounted is viewed from the front along the vertical and horizontal directions. Grid-shaped reinforcing ribs 121 are integrally formed on the side wall 113.

  Components such as coil cases 125 and 127 around which the coil 123 is wound are attached to one surface of the substrate 117 opposite to the side wall 113. For this reason, the reinforcing rib 121 is provided on the substrate mounting surface 113 a facing the other surface of the substrate 117.

  The bolt hole 129 of the substrate 117 and the bolt mounting portion 119 of the side wall 113 of the filter box 112 are made to correspond to each other, and a bolt (not shown) is inserted into the bolt hole 129 and fastened to the bolt mounting portion 119. It is attached to the board attachment surface 113a of the side wall 113.

  18 to 20 show the coil case 125 made of resin. The coil case 125 includes a support part 131 located on the lower side and a coil holding part 133 located on the upper side of the support part 131. The coil holding part 133 has a through hole 133a at the center and is formed in a substantially disk shape when viewed from the front. The coil 123 is wound around the coil holding part 133 through the through hole 133a.

  Further, the outer shape of the bottom surface of the support portion 131 is substantially rectangular in the left-right direction in FIG. 20, and bolt fastening portions 137 are formed at the four corners of the bottom surface. Corresponding to the bolt fastening portion 137, a bolt insertion hole is provided on the substrate 117 side, and a bolt 138 is inserted into the bolt insertion hole from the opposite side to the coil case 125 and fastened to the bolt fastening portion 137. 125 is attached to the substrate 17.

  And in the center of the rectangular sides (four sides) on the bottom surface of the support portion 131, that is, one location in the center between the bolt fastening portions 137 and one location in the center portion of the bottom surface of the support portion 131, a total of 5 locations. The joint portions 139 are provided apart from each other. These joints 139 are connected to each other by eight connecting ribs 141.

  Further, the bottom surface between the two bolt fastening portions 137 on the upper side in FIG. 20 and the joint portion 139 collinear with the two bolt fastening portions 137 extends downward in FIG. Two positioning pins 135 to be inserted into the positioning holes 117 protrude.

  As shown in FIG. 20, the bottom surfaces 139a of the five joint portions 139 are formed in a circular shape, and as shown in FIGS. 18 and 19, the height H is above the bottom surface 137a of the bolt fastening portion 137. Is arranged. For this reason, when the bolt fastening portion 137 is fastened on the substrate 117, a gap of height H is formed between the substrate 117 and the bottom surface 139a of the joint portion 139.

  Then, by applying an adhesive to the bottom surface 139a of the joint 139, the joint 139 and the surface of the substrate 117 are joined via the adhesive. At this time, since the adhesive is located in the gap corresponding to the height H, the adhesive can be reliably interposed between the substrate 117 and the bottom surface 139a of the joint portion 139. In addition, since the bottom surface 139a of the joint portion 139 is circular, the adhesive can be efficiently applied to the entire bottom surface 139a.

  On the other hand, as shown in the front view of FIG. 21, the reinforcing rib 121 provided on the side wall 113 of the filter box 112 intersects the vertical rib 143 extending in the vertical direction (vertical direction) and the vertical rib 143. The horizontal ribs 145 extending in a substantially horizontal direction (lateral direction) form a lattice shape.

  Of these reinforcing ribs 121, a vertical rib 143 corresponding to a central axis M extending in the vertical direction is located at the center in the left-right direction of the support portion 131 of the coil case 125 whose attachment to the filter box 112 is indicated by a two-dot chain line. The first reinforcing rib 147 is used. Further, the lateral rib 145 corresponding to the central axis N passing through the center in the vertical direction of the support portion 131 of the coil case 125 and extending in the lateral direction is referred to as a second reinforcing rib 149.

  The first reinforcing rib 147 constitutes a first reinforcing portion, and the second reinforcing rib 149 constitutes a second reinforcing portion, and the first reinforcing portion and the second reinforcing portion constitute a reinforcing portion.

  Then, when the coil case 125 is attached to the side wall 113, three joint portions 139 provided on the support portion 131 of the call case 125 are disposed on the first reinforcing rib 147, and three locations are also provided on the second reinforcing rib 149. Be placed. In addition, four bolt fastening portions 137 are also arranged on the vertical rib 143. In addition, as shown in FIG. 21, the coil case 127 arranged on the lower side of the same shape as the coil case 125 similarly has the five joint portions 151 arranged on the first reinforcing rib 147 and the second reinforcing rib 149. Is done. The four bolt fastening portions 153 are disposed on the vertical rib 143.

  Here, the height of the first reinforcing rib 147 and the second reinforcing rib 149 from the board mounting surface 113a is substantially the same as the height of the bolt mounting part 119 from the board mounting surface 113a. It is higher than the height from the board mounting surface 113a.

  That is, when the substrate 117 is attached to the substrate attachment surface 113a, the back surface of the substrate 117 is in contact with the distal end surface of the bolt attachment portion 119, and the distal end surfaces of the first reinforcement rib 147 and the second reinforcement rib 149 that are the reinforcement portions. Also abut. At this time, the heads of the bolts 138 used when the coil cases 125 and 127 are attached to the substrate 117 are the other reinforcing ribs 121 and the substrate that are lower than the first reinforcing rib 147 and the second reinforcing rib 149. 117.

  As described above, according to the present embodiment, the first reinforcing rib 147 and the second reinforcing rib 149 provided on the substrate mounting surface 113a of the filter box 112 are the components of the coil 123 and the coil case 125 (127). It is set at a position corresponding to the central axes M and N.

  Here, the coil 123 and the coil case 125 (127) are attached in a state indicated by a two-dot chain line in FIG. It is. For this reason, the center of gravity of the component consisting of the coil 123 and the coil case 125 (127) is a position corresponding to one joint 139 at the center, and the center of gravity is the first reinforcing rib 147 and the second reinforcing rib 149. Corresponds to the position where and intersect. Accordingly, the central axes M and N correspond to axes passing through the center of gravity of the component.

  That is, the reinforcing portion includes a first reinforcing portion that extends in one direction (vertical direction) at a position corresponding to the center of gravity of the component, and a second reinforcing portion that extends in a direction (lateral direction) intersecting the first reinforcing portion. , Will have.

  When the central axes M and N are axes passing through the center of gravity of the component consisting of the coil 123 and the coil case 125 (127), the central axis M is a side wall of the filter box (housing) in a direction perpendicular to the board mounting surface 113a. A first reinforcing rib 147 is provided on the axis projected onto 113, and a second reinforcement is formed on the axis projected on the side wall 113 of the filter box (housing) in a direction perpendicular to the substrate mounting surface 113a. Ribs 149 are provided. In this embodiment, the central axis M and the central axis N are orthogonal to each other, and the direction in which the first reinforcing rib 147 extends and the direction in which the second reinforcing rib 149 extends are also orthogonal to each other.

  Thus, according to the present embodiment, when the substrate 117 is attached to the bolt attachment portion 119 of the substrate attachment surface 113a, the back surface of the substrate 117 is the first reinforcement rib 147 and the second reinforcement rib 149 that are the reinforcement portions. Since it abuts on the tip surface, the surface rigidity of the substrate 117 in the attached state can be increased.

  As a result, for example, even when the filter box 112 is subjected to vibration when the vehicle on which the charging device 1 is mounted travels, the vibration of the board 117 with increased surface rigidity in the mounted state can be suppressed, and the mounted components An adverse effect on a certain coil 123 and the substrate 117 can be suppressed.

  In that case, in this embodiment, the 1st reinforcement rib 147 and the 2nd reinforcement rib 149 are set to the position corresponding to the central axes M and N which pass the gravity center of components. As a result, the parts have substantially the same weight on both sides of the first and second reinforcing ribs 147 and 149, and the reinforcing ribs 147 and 149 can efficiently hold the weight of the parts. Therefore, when the filter box 112 receives vibration input from the outside, even if the component is a heavy object such as the coil 123, the vibration of the substrate 117 starting from the component is centered on the reinforcing portion (center of gravity). As compared with the case where the weights on both sides are different, it can be more efficiently suppressed, and adverse effects on the mounted components and the substrate can be more reliably suppressed.

  In the present embodiment, the reinforcing portion includes a first reinforcing rib 147 that is a first reinforcing portion extending in one direction at a position corresponding to the center of gravity of the component, and a first portion extending in a direction intersecting the first reinforcing portion. And a second reinforcing rib 149 that is two reinforcing portions. For this reason, the surface rigidity of the board | substrate 117 of the up-down direction and the left-right direction increases, and the inhibitory effect with respect to an external vibration input can be improved further.

  Moreover, in this embodiment, the 1st reinforcement rib 147 and the 2nd reinforcement rib 149 which are reinforcement parts are integrated with the box main body 112a of the filter box 112 which is a housing. For this reason, since the first reinforcing rib 147 and the second reinforcing rib 149 can be integrally formed at the time of resin molding of the box body 112a, when the first reinforcing rib 147 and the second reinforcing rib 149 are manufactured separately from the box body 112a. Compared with this, manufacturing becomes easier and it can contribute to cost reduction.

  Further, since the first reinforcing rib 147 and the second reinforcing rib 149 also function as the reinforcing ribs of the filter box 112, the rigidity of the filter box 112 is further increased by the height of the other reinforcing ribs. Can do.

  In the above-described embodiment, the coil 123 and the coil case 125 (127) are described as examples of components to be mounted on the substrate 117. However, the present invention is not limited to these components, and other gravitational objects such as capacitors are used. But you can.

112 Filter box (housing)
113a Filter Box Substrate Mounting Surface 117 Substrate 123 Coil (Parts)
125,127 Coil case (parts)
147 1st reinforcement rib (1st reinforcement part, reinforcement part)
149 2nd reinforcement rib (2nd reinforcement part, reinforcement part)
M, N Center axis (Axis passing through the center of gravity of the part)

Claims (3)

  A board with components mounted on one side is attached to the housing, and a reinforcing part that abuts the other side of the board is provided on the board mounting surface of the housing opposite to the other side of the board. A board mounting structure characterized by being set at a position corresponding to an axis passing through the center of gravity of the component.   The reinforcing portion includes a first reinforcing portion extending in one direction at a position corresponding to the center of gravity of the component, and a second reinforcing portion extending in a direction intersecting the first reinforcing portion. The board mounting structure according to claim 1.   The board mounting structure according to claim 1, wherein the reinforcing portion is integrated with the housing.

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