JP5604340B2 - Case - Google Patents

Description

  The present invention relates to a case for housing a substrate.

  Conventionally, as a substrate fixing structure of this type of case, there is a structure in which a boss for fixing the substrate is provided at the bottom of the case for housing the substrate, and a step for supporting the peripheral portion of the substrate is provided on the inner wall of the case (see Patent Document 1). ).

JP-A-11-284374

  However, such a conventional case substrate fixing structure has a problem in that it is difficult to ensure the rigidity of the portion where the case supports the substrate.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a case that can increase the rigidity of a portion that supports a substrate.

The present invention is a case for accommodating a substrate, and includes a plurality of case walls connected in a box-shaped frame shape, a substrate mounting beam spanned in a beam shape inside the case wall, and a substrate mounting beam to the substrate. A board bracket that protrudes toward the board and a board mounting seat that is formed at the tip of the board bracket and to which the board is mounted, and defines a mounting space between the board and the board mounting beam where an electronic component mounted on the board faces. It was characterized by being .

  According to the present invention, since the substrate mounting beam is connected to the case wall and hung, the substrate mounting beam suppresses the deformation of the case wall even when an external force is applied to the case. Enhanced.

The disassembled perspective view of the control unit which shows embodiment of this invention. The perspective view of a case. A three-sided view of the case. Similarly, two views of the case. The three-sided figure which shows a part of case similarly. Sectional drawing which follows the AA line of FIG. Sectional drawing which follows the BB line of FIG. Sectional drawing which follows the CC line of FIG. 3 similarly. Similarly, two views of the packing. Sectional drawing which follows the DD line of FIG.

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

  A control unit 1 shown in FIG. 1 is mounted on a construction machine such as a hydraulic excavator, for example, and inputs signals from an operating unit, a detector, etc. (not shown) to control the operation of a hydraulic valve, an electric motor, and the like.

  The control unit 1 has a structure that can withstand vibrations and impacts generated in the vehicle during the operation of the hydraulic excavator. Hereinafter, the structure of the control unit 1 will be described. Here, three axes X, Y, and Z that are orthogonal to each other are set, and the X axis extends in a substantially horizontal front-rear direction, the Y axis extends in a substantially horizontal horizontal direction, and the Z axis extends in a vertical direction (substantially vertical direction).

  FIG. 1 is an exploded perspective view of the control unit 1. The control unit 1 includes a case 50 provided as a casing, a control board assembly 40 accommodated in the case 50, and upper and lower cases closing first and second (upper and lower) case openings 48 and 49 that open in the case 50. Cover 30 and upper and lower packings 20 interposed between the cover 30 and the case 50.

  FIG. 2 is a perspective view showing a state in which the control board assembly 40 is assembled to the case 50. The case 50 includes a plurality of (four) case walls 52 to 55 connected in a box-like frame shape, and a substrate mounting beam 70 provided inside the case walls 52 to 55. The control board assembly 40 is attached to the first board mounting seat 81 provided in the 70.

  The control board assembly 40 includes a board (printed board) 41, an electronic component 42 mounted on the board 41, and connectors 43 and 44 to which wiring from a power source and wiring for leading input / output signals are connected.

  3A is a rear view of the case 50, FIG. 3B is a plan view of the case 50, FIG. 3C is a front view of the case 50, and FIG. 4D is a side view of the case 50. It is a figure and (e) is a bottom view of case 50. FIG.

  The case 50 is integrally formed by casting using a metal such as an aluminum material.

  The four case walls 52 to 55 extend in a quadrangular frame shape. The front and rear case walls 52 and 53 extend in the Y-axis direction and the Z-axis direction. The left and right case walls 54 and 55 extend in the X-axis direction and the Z-axis direction.

  The case wall is not limited to this, and may be configured to extend, for example, in a triangular shape or other shapes.

  Third and fourth case openings 56 and 57 are opened in the front case wall 52, and connectors 43 and 44 are assembled to the third and fourth case openings 56 and 57.

  In the case 50 having a rectangular box shape, first and second (upper and lower) case openings 48 and 49 are opened inside four case walls 52 to 55, and the first and second case openings 48. , 49 have first and second (upper and lower) open end faces 58 and 59.

  The first and second open end faces 58 and 59 extend in a quadrangular ring shape. A plurality of bosses 85 project in the Z-axis direction at predetermined intervals on the first and second opening end faces 58 and 59.

  The boss 85 protrudes in a cylindrical shape from the first and second opening end faces 58 and 59, and has a screw hole that opens to the top face 87.

  The upper and lower covers 30 are fastened to the case walls 52 to 55 via screws (not shown) that are in contact with the top surfaces 87 of the bosses 85 and screwed into the screw holes of the bosses 85.

  The packing 20 is interposed between the first and second opening end surfaces 58 and 59 and the upper and lower covers 30 to seal the inside of the case 50.

  Each of the case walls 52 to 55 is formed as a beam member having a U-shaped cross section (see FIGS. 7 and 8), and the upper and lower end surfaces thereof are planar as first and second opening end surfaces 58 and 59, respectively. Formed.

  The case 50 has four case corners 69 in which end portions of adjacent case walls 52 to 55 are connected orthogonally to each other, and a corner bracket 60 is formed at each case corner 69. The corner bracket 60 is fastened to a mounting seat (support portion) 9 provided in the vehicle via a bolt (not shown).

  5A is a side view of the corner bracket 60, FIG. 5B is a plan view of the corner bracket 60, and FIG. 5C is a front view of the corner bracket 60. FIG. 6 is a cross-sectional view taken along line AA in FIG.

  The corner bracket 60 is formed in a column shape extending in the Z-axis direction, and is provided as a case corner portion 69 that connects the end portions of the adjacent case walls 52 and 54. The case corner portion 69 has end portions of the case walls 52 to 55 and a corner bracket 60. The corner bracket 60 constitutes a part of the case corner portion 69.

  2. Description of the Related Art Conventionally, there is a structure in which a case housing an electronic device is attached to a vehicle body or the like by providing a plurality of brackets protruding outward from a case wall on the case and fastening the brackets to a mounting seat via a plurality of bolts. However, such a conventional structure has a problem that the case is enlarged because the bracket projects outward from the case wall.

  On the other hand, in the case 50 of the present invention, since the corner bracket 60 is provided at the case corner portion 69, the bracket does not protrude outward from the case walls 52 to 55 as in the conventional structure, and the case 50 is made compact. Is peeled off.

  The corner bracket 60 has two case walls 52 and 54 and two bracket side surfaces 60a that extend continuously. The two bracket side surfaces 60a are orthogonal to each other and extend in the X-axis direction and the Y-axis direction, respectively.

  As shown in FIG. 6, the corner bracket 60 includes a bolt hole 61 through which a bolt is inserted, a bolt seating surface 63 through which the bolt hole 61 is opened to seat the bolt, and a bolt seat 61 that is also opened through the mounting seat 9. And a case seat surface 62 seated on the base, and fastened to the mounting seat 9 via bolts. Both ends 61 a and 61 b of the bolt hole 61 are opened to the bolt seating surface 63 and the case seating surface 62, respectively.

  The corner bracket 60 has a bracket recess 64 that is recessed with respect to the first (upper) opening end surface 58. The bolt seating surface 63 is formed as the bottom surface of the bracket recess 64.

  A bolt head or a nut that is screwed onto the bolt is seated on the bolt seating surface 63. The head or nut of the bolt is accommodated in the bracket recess 64 so as not to protrude upward from the first opening end surface 58.

  The first opening end surface 58 is partially deleted by forming the bracket recess 64. Thus, the first opening end surface 58 has a corner portion 58 c whose width is partially reduced at the case corner portion 69.

  The corner bracket 60 has bracket leg portions 65 protruding in the Z-axis direction with respect to the second (lower) opening end surface 59. The case seat surface 62 is formed as a tip end surface (lower end surface) of the bracket leg portion 65. Thereby, in a state where the case 50 is installed on the vehicle seat 9 via the bracket legs 65, the second opening end surface 59 is separated from the seat 9, and the lower cover 30 is interposed between the two. A space is provided for interposing.

  When the two cases 50 are installed so as to overlap each other, the bracket leg portion 65 of the corner bracket 60 of the upper case 50 engages with the bracket recess 64 of the corner bracket 60 of the lower case 50, and The case seat surface 62 of the bracket leg 65 of the case 50 is in contact with the bolt seating surface 63 of the bracket recess 64 of the lower case 50.

  The second opening end face 59 is partially deleted by forming the bracket leg portion 65. Thus, the second opening end surface 59 has a corner portion 59c whose width is partially reduced at the case corner portion 69 (see FIG. 4E).

  The first and second opening end faces 58 and 59 have substantially the same shape.

  The corner bracket 60 has a bracket blanking portion 66 that is recessed in a concave shape with respect to the bracket side surface 60a, so that the weight of the case 50 can be reduced.

  The corner bracket 60 is divided into a bolt seating base portion 68 having a bolt seating surface 63 and a bracket leg portion 65 when the bracket lightening portion 66 opens in the middle of the corner bracket 60.

  The corner bracket 60 has a bracket reinforcing rib 67 extending to face the bracket lightening portion 66. The bracket reinforcing rib 67 is formed in a strip shape extending in the X-axis direction and the Z-axis direction, and both ends (upper and lower ends) thereof are connected to the bolt seating base portion 68 and the bracket leg portion 65.

  In the corner bracket 60, the bolt seating base 68 is reinforced by the bracket reinforcing rib 67, so that the bolt seating base 68 is prevented from being deformed by the tightening load of the bolt seated on the bolt seating surface 63.

  A straight line L shown in FIG. 6 indicates a substrate attachment position where the substrate 41 is attached to the first substrate attachment seat 81. The substrate 41 abuts on the first substrate mounting seat 81 at the substrate mounting position L. The bolt seating surface 63 is disposed in a direction (upward) away from the case seating surface 62 with respect to the board mounting position L. The corner bracket 60 has a structure formed as a part of the case corner 69 so that the bolt seating surface 63 that is the upper end of the corner bracket 60 can be set higher than the board mounting position L. Arranged in the middle.

  Thus, the board mounting position L is arranged in the middle of the corner bracket 60, and the first board mounting seat 81 is surrounded by the four columnar corner brackets 60, so that the support rigidity of the first board mounting seat 81 is effective. The vibration of the substrate 41 can be suppressed. More specifically, the four corner brackets 60 have high rigidity as columnar structures standing on the installation seat 9 when fastened to the installation seat 9 of the vehicle via bolts. On the other hand, the first board mounting seat 81 is arranged in the middle of the four columnar corner brackets 60 so that the first board mounting seat 81 is in the Z-axis direction with respect to the four columnar corner brackets 60. Therefore, the support rigidity of the first board mounting seat 81 with respect to the corner bracket 60 can be increased, and the board 41 can be prevented from vibrating due to vibrations and impacts input to the case 50.

  On the other hand, in the structure in which the bolt seating surface 63 is arranged below the Z-axis direction with respect to the board mounting position L (direction approaching the case seating face 62), the first board mounting seat 81 is a columnar corner bracket. Since the first board mounting seat 81 is separated upward from the corner bracket 60, the first board mounting seat 81 is likely to swing with respect to the corner bracket 60. There is a possibility that the substrate 41 cannot be sufficiently suppressed from vibrating with respect to vibrations and impacts input to the case 50.

  The substrate mounting beam 70 includes four vertical beams 71 and three horizontal beams 72 that are stretched in a beam shape inside the case walls 52 to 55. The number of the vertical beams 71 and the horizontal beams 72 is not limited to this, and is increased or decreased according to the rigidity required for the case 50.

  The three transverse beams 72 are formed in a beam shape extending in the Y-axis direction, and both ends thereof are coupled to the left and right case walls 54 and 55. One transverse beam 72 arranged at the rear end is connected to the rear case wall 53. The transverse beam 72 disposed at the front end is not connected to the front case wall 52, and an interposing space for the connectors 43 and 44 is provided between the front beam and the front case wall 52.

  FIG. 7 is a cross-sectional view of the case 50 taken along line BB in FIG.

  Each of the case walls 52 to 55 has a U-shaped cross section, and includes a frame portion 45 extending in the Z-axis direction and upper and lower flange portions 46 and 47 extending orthogonally from both ends of the frame portion 45.

  A substrate bracket 80 is formed at the intersection of the horizontal beam 72 and the vertical beam 71. The substrate bracket 80 is formed in a column shape extending in the Z-axis direction. First and second board mounting seats 81 and 82 are formed on the upper and lower ends of the board bracket 80, respectively. Screw holes 83 and 84 are formed in the first and second board mounting seats 81 and 82, respectively. The control board assembly 40 is fastened to the first board mounting seat 81 via a bolt (not shown) that is screwed into the screw hole 83. However, the present invention is not limited to this, and the control board assembly 40 may be fastened to the second board mounting seat 82 via a bolt screwed into the screw hole 84.

  The left and right end substrate brackets 80 are connected to the frame portions 45 of the left and right case walls 54 and 55. The left and right case walls 54 and 55 are each increased in rigidity by the board bracket 80, and the deformation of the case 50 due to vibration and impact transmitted from the vehicle can be suppressed.

  Reinforcing ribs 74 and 75 are formed between both ends of the lateral beam 72 and the left and right case walls 54 and 55. The reinforcing ribs 74 and 75 have a substantially triangular cross-sectional shape, and are formed such that one side thereof is connected to the horizontal beam 72 and the other side is connected to the left and right substrate brackets 80. The rigidity of the left and right case walls 54 and 55 and the left and right end board brackets 80 is enhanced by the reinforcing ribs 74 and 75, and the deformation of the case 50 due to vibration and impact transmitted from the vehicle can be suppressed.

  FIG. 8 is a cross-sectional view of the case 50 taken along the line CC in FIG.

  The intersection of the rear beam 72 and the vertical beam 71 and the board bracket 80 are formed to be connected to the frame portion 45 of the rear case wall 53 via the reinforcing rib 73. A connecting portion between the rear beam 72 and the vertical beam 71 is formed to be connected to the frame portion 45 of the rear case wall 53 via a reinforcing rib 76. The rigidity of the rear case wall 53 is enhanced by the reinforcing ribs 73 and 76, and the deformation of the case 50 due to vibration and impact transmitted from the vehicle can be suppressed.

  A reinforcing rib 77 is formed between the vertical beam 71 and the substrate bracket 80. The reinforcing rib 77 has a substantially triangular cross-sectional shape, and one side thereof is connected to the vertical beam 71 and the other side is connected to the substrate bracket 80. Each of the vertical beam 71 and the board bracket 80 is enhanced in rigidity by the reinforcing rib 77, and deformation of the case 50 due to vibration and impact transmitted from the vehicle can be suppressed.

  As shown in FIG. 7, reinforcing ribs 78 are formed between the vertical beams 71 at the left and right ends and the frame portions 45 of the left and right case walls 54 and 55. The reinforcing rib 78 has a substantially triangular cross-sectional shape, and is formed such that one side thereof is connected to the vertical beam 71 and the other side is connected to the frame portion 45. The rigidity of the vertical beam 71 and the left and right case walls 54 and 55 is enhanced by the reinforcing ribs 78, and deformation of the case 50 due to vibration and impact transmitted from the vehicle can be suppressed.

  As shown in FIGS. 7 and 8, the substrate bracket 80 is formed in a columnar shape protruding from the vertical beam 71 and the horizontal beam 72, and is a space between the plurality of substrate brackets 80 and below the vertical beam 71 and the horizontal beam 72. The first mounting space 88a is defined in this space. That is, the first mounting space 88 a is defined between the substrate 41 and the vertical beam 71 and the horizontal beam 72. The electronic component 42 mounted on the substrate 41 and having a height lower than the height between the substrate 41 and the vertical beam 71 and the horizontal beam 72 faces the first mounting space 88a. Thereby, it is possible to avoid the short electronic component 42 from interfering with the substrate mounting beam 70, the space of the case 50 is effectively used, and the case 50 can be made compact.

  As shown in FIG. 2, the vertical beam 71 and the horizontal beam 72 extend in a lattice shape, and a second mounting space 88b is defined between the two. The electronic component 42 mounted on the substrate 41 and having a height equal to or higher than the height between the substrate 41 and the vertical beam 71 and the horizontal beam 72 faces the second mounting space 88b. Thus, the tall electronic component 42 is prevented from interfering with the substrate mounting beam 70, the space of the case 50 is effectively used, and the case 50 can be made compact.

  The present invention is not limited to this, and the substrate mounting beam 70 may be brought into contact with the electronic component 42 so that the heat generated in the electronic component 42 is radiated through the substrate mounting beam 70. Further, a heat conducting member such as a heat sink or a heat pipe may be interposed between the electronic component 42 and the substrate mounting beam 70 so that heat generated in the electronic component 42 is dissipated through the substrate mounting beam 70. .

  Since the case 50 has a structure having first and second (upper and lower) case openings 48 and 49, the control board assembly is attached to the first and second board mounting seats 81 and 82 provided above and below the board mounting beam 70. 40 can be attached respectively.

  Further, after the board 41 of the control board assembly 40 is attached to the board mounting beam 70, the connectors 43 and 44 are assembled to the board 41, and the soldering operation for connecting the wiring of the connectors 43 and 44 to the circuit on the board 41 is performed. be able to.

  As shown in FIG. 1, the upper and lower packings 20 are respectively interposed between the first and second opening end surfaces 58 and 59 of the case 50 and the upper and lower covers 30 to seal the inside of the case 50. The upper and lower packings 20 have the same shape. The upper and lower covers 30 have the same shape.

  FIG. 9A is a plan view showing the packing 20, and FIG. 9B is a side view showing the packing 20.

  As shown in FIG. 9 (a), the packing 20 extends in a quadrangular annular shape, and extends linearly in the X-axis direction and the Y-axis direction, and the end portions of the adjacent packing straight portions 22. It has four packing corner parts 23 that bend and extend so as to connect each other.

  The packing 20 has a strip-shaped base (packing substrate) 25 and a lip 21 protruding from the base 25 in the Z-axis direction, and these are integrally formed of an elastic material. The packing 20 is compressed between the first and second opening end surfaces 58 and 59 and the upper and lower covers 30, so that the base 25 and the lip 21 are elastically deformed into a flat plate shape.

  FIG. 10 is a cross-sectional view taken along the line DD in FIG. 9 and shows a free state in which the packing 20 is not elastically deformed.

  As shown in FIG. 10, the base 25 has two base surfaces 26 on the upper and lower sides, one base surface 26 faces the first and second opening end surfaces 58 and 59, and the other base surface 26 covers the other. Confront 30. The base surface 26 extends planarly in the X axis direction and the Y axis direction. In a state where the packing 20 is compressed between the first and second opening end surfaces 58 and 59 and the upper and lower covers 30, one base surface 26 abuts on the first opening end surface 58 of the case 50, The other base surface 26 contacts the cover 30.

  The base 25 of the packing straight portion 22 has a base inner peripheral portion 25 a extending inward from the lip 21 and a base outer peripheral portion 25 b extending outward from the lip 21. The base outer peripheral portion 25b has a longer width in the direction orthogonal to the lip 21 (X-axis direction or Y-axis direction) than the base inner peripheral portion 25a.

  The packing 20 is formed such that a plurality of base holes 29 are arranged with a predetermined interval. The base hole 29 is formed so as to penetrate the base outer peripheral portion 25b in the Z-axis direction. The packing 20 is positioned so as to extend along the first and second opening end surfaces 58 and 59 of the case 50 by inserting the boss 85 of the case 50 into the base hole 29 and mounting the packing 20 on the case 50.

  The outer shape of the base 25 is formed in substantially the same shape as the first and second opening end faces 58 and 59 described above. The packing corner portion 23 of the packing 20 is formed in substantially the same shape as the corner portions 58c and 59c of the first and second opening end faces 58 and 59.

  In the packing corner portion 23, the base outer peripheral portion 25 b extending outward from the lip 21 is partially deleted by a portion facing the bracket concave portion 64 or the bracket leg portion 65. As a result, the width of the base outer peripheral portion 25 b is smaller than the packing straight portion 22 in the packing corner portion 23.

  As shown in FIG. 9A, in the packing 20, the base 25 is formed in a flat plate shape, while the protruding height of the lip 21 changes corresponding to the positions of the base hole 29 and the packing corner portion 23.

  The hole proximity lip portion 21 a is a portion close to the base hole 29 of the lip 21, and is formed so as to extend linearly along with the base hole 29 and symmetrically with respect to the base hole 29.

  The hole-separating lip portion 21 b is a part away from the base hole 29 of the lip 21 and is disposed between the adjacent base holes 29. Both ends of the hole separation lip portion 21 b (boundary portions with the hole proximity lip portion 21 a) have a substantially equal interval with respect to the adjacent base holes 29.

  As shown in FIG. 10, the packing 20 is formed in a substantially circular cross-sectional shape at a portion including the hole separation lip portion 21 b, and is formed in a substantially oval shape in which the cross-sectional shape of the portion including the hole proximity lip portion 21 a is flat. .

  The packing 20 is formed such that the protruding height of the hole separating lip portion 21 b with respect to the base surface 26 is higher than the protruding height of the hole proximity lip portion 21 a with respect to the base surface 26.

  The corner lip portion 21c is a portion that extends along the packing corner portion 23 of the lip 21, and is formed so as to connect the end portions of the hole proximity lip portion 21a that are substantially orthogonal to each other.

  The packing 20 is formed so that the protruding height of the corner lip portion 21 c with respect to the base surface 26 of the base 25 is equal to the protruding height of the hole separation lip portion 21 b with respect to the base surface 26.

As shown in FIG. 10, in the Z-axis direction, the protrusion height of the boss 85 with respect to the first opening end surface 58 is E, the thickness of the base 25 is F, and the thickness of the portion including the hole proximity lip 21a is the thickness. When G is G and the thickness of the part including the hole separation lip 21b is H, the dimensions of each part are set so as to satisfy the relationship of the following equation.
E ≦ F <G <H (1)
As shown in FIG. 1, when the control board assembly 40 is assembled to the case 50 when the control unit 1 is manufactured, the upper and lower covers are attached to the first and second opening end surfaces 58 and 59 of the case 50 via the packing 20. 30 and the upper and lower covers 30 are fastened to the case walls 52 to 55 via screws that are screwed into the bosses 85. Thereby, the cover 30 is seated on the top surface 87 of the boss 85, and a gap of height E is defined between the cover 30 and the first and second opening end surfaces 58 and 59. The packing 20 is interposed in the gap and is compressed between the first and second opening end surfaces 58 and 59 and the cover 30.

  Due to the structure in which the sheet metal cover 30 is fastened to the first and second opening end faces 58 and 59 via a plurality of bolts, the cover 30 is bent between adjacent bolts, and the amount of bending is separated from the bolt. It grows according to. That is, this deflection causes the surface pressure of the packing 20 to increase at a portion close to the bolt and to decrease at a portion away from the bolt. For this reason, in the conventional packing in which the protruding height of the lip portion is constant, a part of the packing protrudes between the cover and the opening end surface of the case in the vicinity of the bolt, or the packing surface pressure between adjacent bolts. There was a possibility of shortage.

  In response to this, in the packing 20, the thickness of each part is set so as to satisfy the relationship of the expression (1), so that the protrusion of the hole separation lip part 21b is between adjacent bolts where the deflection of the cover 30 is large. Since the height is formed higher than the hole proximity lip portion 21a, the surface pressure with respect to the cover 30 is sufficiently obtained, and the sealing performance (waterproofness) by the packing 20 can be secured.

The hole proximity lip portion 21a is formed to have a protruding height lower than that of the hole separation lip portion 21b. together is, the cover 30 and the first, site around the base hole 29 in the gasket 20 from between the second opening end face 58, 59 is prevented from out seen, can ensure sealability by the packing 20.

  In response to an increase in the deflection of the cover 30 between adjacent bolts, the hole separation lip portion 21b is formed with a protruding height higher than that of the hole proximity lip portion 21a. Thus, the sealing performance by the packing 20 can be secured.

  Since the corner portion of the cover 30 is located between adjacent bolts and the pressing force against the packing 20 is weak, in the conventional packing in which the protruding height of the lip portion is formed constant, the corner of the cover 30 is the surface of the packing. There was a possibility of lack of pressure.

  The corner lip portion 21c located at the packing corner portion 23 is formed to have a protruding height higher than the hole proximity lip portion 21a in response to the weak pressing force against the portion of the cover 30 facing the packing corner portion 23. Therefore, the surface pressure with respect to the cover 30 is sufficiently obtained, and the sealing performance by the packing 20 can be secured.

  In the packing corner portion 23, a portion facing the bracket recess 64 is deleted, but by having the corner lip portion 21 c having a high protruding height, a sufficient surface pressure with respect to the cover 30 is obtained, and the sealing performance by the packing 20 is achieved. Can be secured.

  Thus, in the packing 20, the surface pressure against the contact portions of the first and second opening end surfaces 58 and 59 and the cover 30 is sufficiently secured over the entire circumference by the upper and lower lips 21, and the sealing performance is improved.

  Some conventional packings have a structure in which a plurality of lips extend in parallel in order to ensure the sealing performance. On the other hand, the packing 20 of the present embodiment does not need to have a configuration in which a plurality of lips extend in parallel, and the first and second opening end surfaces 58 and 59 and the cover 30 can be prevented from being enlarged. .

  The packing 20 may have a configuration in which a plurality of lips 21 extend in parallel depending on the required sealing performance. Also in this case, the sealing performance can be improved by providing the lip 21 with the hole proximity lip portion 21a, the hole separation lip portion 21b, and the corner lip portion 21c having different protrusion heights in the Z-axis direction.

  Further, the packing 20 is not limited to this, and may have only one of the upper and lower lips 21 protruding in the Z-axis direction. Also in this case, the sealing performance can be improved by providing the lip 21 with the hole proximity lip portion 21a, the hole separation lip portion 21b, and the corner lip portion 21c having different protrusion heights in the Z-axis direction.

  Hereinafter, the gist, operation, and effect of the present embodiment will be described.

  In the present embodiment, a case 50 that accommodates a substrate 41, which is a plurality of case walls 52 to 55 connected in a box-like frame shape, and a substrate spanned in a beam shape inside the case walls 52 to 55. A mounting beam 70 and a substrate mounting seat 81 provided on the substrate mounting beam 70 to which the substrate 41 is mounted are provided.

  Based on the above configuration, the substrate mounting beam 70 is connected to the case walls 52 to 55 so as to suppress the deformation of the case walls 52 to 55 even when an external force is applied to the case 50. The rigidity of both the walls 52 to 55 and the board mounting seat 81 is enhanced. Thereby, the vibration of the board | substrate 41 with respect to the vibration and impact which are transmitted to the case 50 from a vehicle is suppressed, and durability of the board | substrate 41 is improved.

  In the present embodiment, the substrate mounting beam 70 includes a vertical beam 71 and a horizontal beam 72 extending so as to cross each other, and a substrate mounting seat 81 is formed at the intersection of the vertical beam 71 and the horizontal beam 72.

  Based on the above configuration, in the case 50, the rigidity of the substrate mounting seat 81 is effectively increased by the vertical beam 71 and the horizontal beam 72, and deformation of the substrate 41 due to vibration and impact transmitted from the vehicle to the case 50 can be suppressed.

  In the present embodiment, the substrate mounting beam 70 includes a vertical beam 71 and a horizontal beam 72 that extend so as to intersect with each other, and a substrate bracket 80 that protrudes toward the substrate 41 from the intersection of the vertical beam 71 and the horizontal beam 72. A board mounting seat 81 is formed at the tip of the board bracket 80, and a first mounting space 88a is defined between the board 41 and the vertical beam 71 or the horizontal beam 72. In the first mounting space 88a, The configuration is such that the electronic component 42 mounted on the substrate 41 faces.

  Based on the above configuration, the short electronic component 42 is accommodated in the first mounting space 88a without interfering with the substrate mounting beam 70, so that the space of the case 50 is effectively used, and the case 50 has the X and Y axes. Increase in size in the direction can be suppressed.

  In the present embodiment, the substrate mounting beam 70 includes a vertical beam 71 and a horizontal beam 72 extending so as to cross each other, and a second mounting space 88b is defined between the vertical beam 71 and the horizontal beam 72. The second mounting space 88b is configured to face the electronic component 42 mounted on the substrate 41 and having a height equal to or higher than the height between the substrate 41 and the vertical beam 71 and the horizontal beam 72.

  Based on the above configuration, the tall electronic component 42 is accommodated in the second mounting space 88b without interfering with the substrate mounting beam 70, the space of the case 50 is effectively used, and the case 50 is enlarged in the Z-axis direction. Can be suppressed.

  In the present embodiment, the first and second case openings 48 and 49 are closed by the cover 30, and the first and second case openings 48 and 49 are on both sides of the substrate mounting beam 70. It was set as the structure opened.

  Based on the above configuration, the substrate 41 can be attached to the substrate attachment beam 70 from the first and second case openings 48 and 49. As a result, the substrate 41 can be attached to the first and second substrate attachment seats 81 and 82 provided above and below the substrate attachment beam 70, respectively. By providing the two substrates 41 above and below the substrate mounting beam 70, the electronic components 42 mounted on the upper and lower substrates 41 can be stored in a limited space in the case 50, and the case 50 can be made compact.

  The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.

DESCRIPTION OF SYMBOLS 1 Control unit 40 Control board assembly 41 Board | substrate 42 Electronic component 45 Frame part 46, 47 Flange part 48, 49 1st, 2nd case opening part 50 Case 52-55 Case wall 58, 59 1st, 2nd opening end surface 70 Substrate mounting beam 71 Vertical beam 72 Horizontal beam 80 Substrate bracket 81, 82 First and second substrate mounting seats 85 Boss 87 Top surface 88a Mounting space

Claims (4)

A case for accommodating a substrate,
A plurality of case walls connected in a box-shaped frame;
A substrate mounting beam spanned in a beam shape inside the case wall;
A substrate bracket projecting from the substrate mounting beam toward the substrate;
The board mounting seat formed at the tip of the board bracket and to which the board is attached ;
A mounting space in which an electronic component mounted on the substrate faces is defined between the substrate and the substrate mounting beam . The substrate mounting beam comprises a longitudinal beam and a transverse beam extending across each other;
The case according to claim 1, wherein the substrate mounting seat is formed at an intersection of the vertical beam and the horizontal beam. The substrate mounting beam is
A longitudinal beam and a transverse beam extending across each other;
The longitudinal beam and the transverse beam case according to claim 1 or 2, the cross section and the substrate bracket which projects toward the substrate, characterized in that Ru comprising a. Having first and second case openings closed by a cover;
The first and second case openings are opened on both sides of the substrate mounting beam ,
The substrate bracket projects from one side of the substrate mounting beam to form a first substrate mounting seat,
The case according to any one of claims 1 to 3, wherein a second substrate mounting seat is formed on the other side of the substrate mounting beam without projecting the substrate bracket .

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