JP2014175365A - Board case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a board case having high waterproof performance at a lower manufacturing cost than conventional.SOLUTION: Since vertical ridges 41, 42, 51, 52 extending from the rear end to a lid fixing annular protrusion 30 are provided at both side positions of each outer surface of a pair of board facing sidewalls 13, 14 corresponding to a pair of resin injection parts 15B, 15B provided in the rear end wall 15, in a board case 10, molten resin flows smoothly into a part for molding the square cylindrical fitting wall 32 at the front end of the board case 10, out of an injection mold 60, and thereby the shape of the square cylindrical fitting wall 32 is stabilized. Consequently, waterproof performance by a waterproof ring 85 between the square cylindrical fitting wall 32 and the fitting face of the fitting hood 83 of a lid 81 with cover is enhanced.

Description

  The present invention relates to a substrate case having a flat box structure that can accommodate a substrate.

  2. Description of the Related Art Conventionally, as this type of substrate case, one obtained by combining two case components that are die-cast or press-molded products is known. The board case accommodates the board between the case structural bodies, and a lid with a connector fixed to the end of the board is fitted into an opening formed by bending a part of the joint surface between the case structural bodies. It has a structure. Further, a sealing member is disposed between the joint surfaces of the case constituents and between the inner surface of the opening and the lid with the connector to achieve waterproofing (for example, see Patent Document 1).

JP 2007-141959 A (FIG. 1)

  By the way, in order to reduce the manufacturing cost as compared with the above-described conventional substrate case, development of a substrate case having a flat box shape structure in which one side surface is opened as a substrate insertion opening is required. In the substrate case having such a structure, the substrate is inserted from the substrate insertion port, and the substrate insertion port is closed with a lid with a connector fixed to the substrate. However, when such a board case is manufactured with an injection mold, the shape of the square tube fitting wall surrounding the board insertion port in the board case is not stable, and the square tube fitting wall and the lid with the connector Even if a waterproof ring is provided between the fitting surfaces, there is a problem that high waterproof performance cannot be obtained.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a substrate case having a lower manufacturing cost and higher waterproof performance.

  A substrate case according to the invention of claim 1 made to achieve the above object is an injection molded product of resin having a flat box-shaped structure, and one side surface of a flat rectangle located at the front end of the box-shaped structure Is a substrate case having an opening as a board insertion opening and having a lid fixing annular protrusion protruding laterally from a position near the front end, and the front end side of the lid fixing annular protrusion is a square tube-shaped fitting wall. The lid with the connector fixed to the end portion of the board is received from the board insertion port, and the square tube fitting wall is fitted, and between the square tube fitting wall and the fitting surface of the lid with the connector. In the board case in which the lid fixing annular projection is fixed to the lid with the connector in a state in which the waterproof ring is crushed in, the position of the injection mold is at a position near both ends in the longitudinal direction of the rear end wall facing the board insertion port. Each of the resin injection parts facing the resin injection gate Each of the outer surfaces of the pair of substrate-facing side walls facing each other across the substrate has a width and height that extend from the rear end of each of the outer surfaces to the lid fixing annular projection and that are equal to or less than the wall thickness of each substrate-facing side wall. A characteristic feature is that a plurality of the vertical ridges formed are formed at positions closer to both sides corresponding to the resin injection portion.

  According to a second aspect of the present invention, in the substrate case according to the first aspect, a part of the plurality of vertical ridges is connected to each resin injection portion in the longitudinal direction of the rear end wall among the respective outer surfaces of the pair of substrate facing side walls. It is characterized by being placed at the same position.

  According to a third aspect of the present invention, in the substrate case according to the first or second aspect, each outer surface of the pair of substrate facing side walls is perpendicular to the plurality of vertical protrusions and has a width equal to or less than the wall thickness of each substrate facing side wall. And having a plurality of horizontal ridges having a height.

[Invention of Claim 1]
Since the board case of claim 1 has a box-like structure with one side opening as a board insertion opening, the number of parts is reduced compared to a conventional board case in which two case components are assembled to form a box-like structure. Manufacturing costs can be reduced. In the substrate case of the present invention, since the resin injection portion facing the resin injection gate of the injection mold is arranged on the rear end wall, the resin injection is performed on the substrate-facing side wall having a relatively large outer surface area in the box-shaped structure. Compared with the case where the gates face each other, the resin pressure applied in the mold opening / closing direction of the injection mold is reduced, and the size of the injection mold can be reduced. Also in this respect, in the present invention, the manufacturing cost of the substrate case can be reduced.

  Further, in the substrate case of the present invention, the pair of resin injection portions provided on the rear end wall extend from the rear end to the lid fixing annular protrusion on both sides of each outer surface of the pair of substrate facing side walls. Since a plurality of vertical ridges are provided, the molten resin flows smoothly into the part of the injection mold that forms the square tube fitting wall at the front end of the substrate case. The shape is stable. Thereby, the waterproof performance when a waterproof ring is provided between the fitting surfaces of the rectangular tubular fitting wall and the lid with the connector is enhanced. In addition, when the inventor made a plurality of prototypes, when the vertical ridges are made to have a width and height that are equal to or greater than the wall thickness of each substrate-facing side wall, the substrate case has a regular shape due to sink marks when the molten resin solidifies. However, if the vertical ridges have a width and height equal to or less than the wall thickness of the substrate-facing side wall, distortion due to sink marks can be suppressed.

[Invention of claim 2]
As in the configuration of claim 2, if a part of the plurality of vertical protrusions is arranged at the same position as each resin injection portion in the longitudinal direction of the rear end wall among the outer surfaces of the pair of substrate facing side walls, The resin flows more smoothly from the resin injection part of the board case to the square tube fitting wall in the injection mold, and the shape of the square tube fitting wall is more stable, and the waterproof performance of the board case is improved. It gets even higher.

[Invention of claim 3]
If a plurality of horizontal ridges perpendicular to the plurality of vertical ridges and having a width and height equal to or less than the wall thickness of each substrate-facing side wall are provided as in the configuration of claim 3, the strength of the substrate case is increased. Can be planned.

The perspective view of the substrate case concerning one embodiment of the present invention. Bottom perspective view of board case Enlarged perspective view of waterproof ventilation part of board case Front view of board case (A) Cross-sectional view of substrate case, (B) Front cross-sectional view of substrate case Cross section of injection mold Cross section of injection mold Perspective view of board case, board and lid with connector A perspective view of a control unit assembled with a board case, board, and lid with connector

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a substrate case 10 of this embodiment is a resin injection-molded product having a flat box-shaped structure, and one side surface of the flat rectangle in the box-shaped structure is opened to open a substrate insertion slot. 11 Hereinafter, the side of the substrate case 10 that includes the substrate insertion opening 11 is the front end, the opposite side is the rear end, and the depth direction of the substrate insertion opening 11 is the front-rear direction of the substrate case 10. 11 will be described in detail with the longitudinal direction of 11 as the lateral direction of the substrate case 10 and the short direction of the substrate insertion port 11 as the vertical direction of the substrate case 10.

  The substrate case 10 includes a pair of substrate facing side walls 13 and 14 opposed in the vertical direction, a pair of substrate supporting side walls 12 and 12 opposed in the horizontal direction, and a rear end wall opposed to the substrate insertion port 11 in the front and rear direction. 15. As shown in FIG. 2, the lower substrate-facing side wall 14 has a flat plate shape as a whole. On the other hand, as shown in FIG. 1, the upper substrate facing side wall 13 is bent at an intermediate position in the front-rear direction, and the front flat plate portion 13 </ b> A whose front side is substantially parallel to the lower substrate facing side wall 14. On the other hand, the rear side of the bent portion is a rear flat plate portion 13B that is gradually inclined downward toward the rear end wall 15. In addition, a side recess 16 is recessed from the middle position in the front-rear direction to the rear end wall 15 at the center in the lateral direction of the upper substrate facing side wall 13. The bottom wall 16 </ b> A of the side recess 16 has a long plate shape extending forward from the rear end wall 15, and the outer edge of the front end has a semicircular shape. Further, the inner wall 16B of the side recess 16 is inclined so as to gradually expand upward from the entire outer edge of the bottom wall 16A.

  A waterproof vent 20 is provided on the bottom wall 16 </ b> A of the side recess 16. Specifically, as shown in FIG. 3, the bottom wall 16 </ b> A is formed with an annular ridge 21 that is concentric with the outer edge shape of the front end thereof, and protrudes outward from the bottom wall 16 </ b> A. The pores 22 are formed through. And the ventilation film 23 which covered the ventilation hole 22 from the outer side is welded inside the annular protrusion 21 among the outer surfaces of the bottom wall 16A. The gas permeable membrane 23 has a characteristic that water does not pass but air passes. Further, a protective cap 24 is fitted and welded inside the annular ridge 21 so as to cover the gas permeable membrane 23, and the gas permeable membrane 23 comes into contact with the outside air through a slit 24 </ b> S formed in the outer edge portion of the protective cap 24. It is like that.

  As shown in FIGS. 1 and 2, each substrate support side wall 12 has curved portions 12A and 12B at corners between a pair of substrate facing side walls 13 and 14, and between these curved portions 12A and 12B. Is the flat plate portion 12C. As shown in FIG. 1, a mounting projection 17 is provided at the lower end of each substrate support side wall 12 at an intermediate position in the front-rear direction. The mounting projection 17 is formed by projecting outer edge ribs 17B on the entire outer edge of the lower surface of the side projection wall 17A projecting laterally from the flat plate portion 12C of the substrate supporting side wall 12. Further, as shown in FIG. 2, circular tube walls 17D and 17D are formed to protrude from the front end portion and the rear end portion of the lower surface of the side protruding wall 17A, and the inside of the circular tube walls 17D and 17D is attached to the mounting protrusion. The mounting holes 17C and 17C penetrate the entire portion 17 in the vertical direction. A metal collar 18 is welded to the inner surface of each mounting hole 17C. A plurality of reinforcing ribs 17L are formed on both the upper and lower surfaces of the side protruding wall 17A so as to project from the flat plate portion 12C or the curved portion 12B of the substrate supporting side wall 12. Further, the end portion of the outer edge rib 17B is also connected to the curved portion 12B.

  The rear end wall 15 has a flat plate shape as a whole, and is provided with crank bent portions 15A and 15A slightly bent forward in a crank shape at positions close to both ends in the lateral direction. And the resin injection | pouring part 15B which concerns on this invention is arrange | positioned in the center of the up-down direction and the horizontal direction in each crank bending part 15A among the outer surfaces of the rear-end wall 15. As shown in FIG. These resin injection portions 15B are portions where resin injection gates 61G and 61G of an injection mold 60 (see FIG. 6), which will be described later, for forming the substrate case 10 face each other.

  As shown in FIG. 3, the outer edge portion of the rear end wall 15 slightly protrudes from the outer surface of the rear end portion of the substrate facing side walls 13 and 14 (only the upper substrate facing side wall 13 is shown in FIG. 3). The rear edge ridge 15T is formed. And the linear groove | channel 15S is each formed in the center of the wall thickness direction in the wall thickness surface which faced the up-down direction among the rear-end edge protrusions 15T. The protruding amount of the rear edge ridge 15T from the substrate facing side walls 13 and 14 is equal to or less than the wall thickness of the substrate facing side wall 13 and the substrate facing side wall 14.

  As shown in FIG. 1, a lid fixing annular protrusion 30 protruding in a stepped manner in the vertical direction and the horizontal direction is provided at a position near the front end on the outer surface of the substrate case 10. As shown in FIG. 4, both end portions in the horizontal direction of the upper side portion and the lower side portion of the lid fixing annular protrusion 30 are formed by thickening part of the substrate facing side walls 13 and 14 to the outside, and the other portions are A space 30K opened forward is provided between the curved portions 12A and 12B and the flat plate portion 12C.

  In the space 30K, a pair of internal ribs 30L and 30L are provided so as to communicate between the outer shell wall 30H of the lid fixing annular protrusion 30 outside the space 30K and each flat plate portion 12C. In addition, cylindrical tube walls 31 are respectively provided between the corners of the outer shell wall 30H located at the four corners of the lid fixing annular protrusion 30 when viewed from the front, and between the curved portions 12A and 12B. The inside of the tube wall 31 is a screw hole 31A. As shown in FIGS. 1 and 2, finger hooking grooves 30 </ b> A are provided on the upper surface and the lower surface of the lid fixing annular protrusion 30 so as to extend in the lateral direction.

  As shown in FIG. 1, a rectangular tube-shaped fitting wall 32 is formed on the front end side of the lid fixing annular protrusion 30 in the substrate case 10. The rectangular tube-shaped fitting wall 32 has a flat rectangular tube shape surrounding the board insertion opening 11, and the corners of the four corners are in a state where the curved portions 12 </ b> A and 12 </ b> B of the substrate support side wall 12 are extended forward. Is curved. As shown in FIGS. 5A and 5B, the thickness (wall thickness) of the square tube-shaped fitting wall 32 is the total thickness of the substrate facing side walls 13 and 14 and the substrate supporting side wall 12. It is thicker and thinner than the thickness of the upper side portion and the lower side portion of the lid fixing annular protrusion 30.

  As shown in FIG. 4, substrate guide grooves 33 and 33 are provided inside the substrate case 10 at positions near the lower ends of the pair of substrate support side walls 12 and 12. The substrate guide groove 33 protrudes from the inner surface of the lower curved portion 12B and extends in the front-rear direction, and the second guide protrusion 33A protrudes from the inner surface of the flat plate portion 12C of the substrate support side wall 12 and extends in the front-rear direction. It is sandwiched between the guide protrusion 33B. In addition, a pair of substrate clamping portions 34 are provided on the inner surface of the rear end wall 15. Each substrate clamping portion 34 includes a first protrusion 34A protruding from the lower end portion of the rear end wall 15 and a second protrusion 34B protruding from a position near the lower end of the rear end wall 15.

  As shown in FIG. 1, a pair of vertical protrusions 41 and 42 according to the present invention are provided on the outer surface of the upper substrate-facing side wall 13 one by one. As shown in FIG. A pair of vertical ridges 51 and 52 according to the present invention are provided on the outer surface of each pair. The vertical protrusions 41, 42, 51, 52 extend in the front-rear direction, the rear end portion is orthogonal to the rear end edge protrusion 15 T of the rear end wall 15, and the front end portion is the lid fixing annular protrusion 30. It is orthogonal to. More specifically, as shown in FIG. 1, with respect to the upper substrate facing side wall 13, a pair of vertical protrusions 41, 41 are just resin injection portions 15 B, 15 B ( The remaining pair of vertical ridges 42 and 42 are arranged on the boundary line between the substrate facing side wall 13 and the curved portion 12A. As shown in FIG. 2, with respect to the lower substrate facing side wall 14, a pair of vertical protrusions 51, 51 are arranged at the same position as the resin injection portions 15 B, 15 B in the left-right direction of the substrate case 10. The remaining pair of vertical protrusions 52, 52 are arranged on the boundary line between the substrate facing side wall 14 and the curved portion 12B. Further, as shown in FIGS. 5A and 5B, the widths and heights of the vertical protrusions 41, 42, 51, and 52 are equal to or less than the wall thicknesses of the substrate facing side wall 13 and the substrate facing side wall 14, respectively. It has become.

  As shown in FIG. 1, a plurality (for example, three) of horizontal protrusions 44 extend between a pair of vertical protrusions 42, 42 on the outer surface of the front flat plate portion 13 </ b> A in the substrate facing side wall 13. . The interval between the horizontal ridges 44, 44 is substantially the same as the interval between the adjacent vertical ridges 41, 42, and the interval between the frontmost horizontal ridge 44 and the lid fixing annular protrusion 30 is as follows. The gap between the horizontal protrusions 44 and 44 is slightly wider. Furthermore, the sub vertical protrusion 43 extends across the horizontal protrusion 44 farthest from the lid fixing annular protrusion 30 at the center in the horizontal direction on the outer surface of the front flat plate portion 13A. Furthermore, the sub horizontal protrusion 45 is extended in the outer surface of the board | substrate opposing side wall 13B among the board | substrate opposing side walls 13 so that between the vertical protrusions 41 and 42 may be connected.

  As shown in FIG. 2, on the outer surface of the lower substrate facing side wall 14, the horizontal ridges 54, sub A vertical protrusion 53 and a sub horizontal protrusion 55 are provided. Further, the width and height of the horizontal protrusions 44 and 54, the sub vertical protrusions 43 and 54, and the sub horizontal protrusions 45 and 55 are substantially the same as the width and height of the vertical protrusions 41, 42, 51, and 52. ing.

  In addition, as shown in FIG. 1, on the outer surface of the curved portions 12 </ b> A and 12 </ b> A outside the pair of vertical protrusions 42 and 42, the corner horizontal protrusions are extended on the extended lines of the horizontal protrusions 44 group and the sub horizontal protrusions 45. 44A and 45A extend. These corner lateral protrusions 44 </ b> A and 45 </ b> A have the same width as the lateral protrusion 44 and are slightly lower than the lateral protrusion 44.

  This completes the description of the structure of the substrate case 10 of the present embodiment. FIG. 6 shows an injection mold 60 for manufacturing the substrate case 10. In the injection mold 60, for example, the movable mold 62 linearly moves in the front-rear direction of the substrate case 10 so that the fixed mold 61 and the movable mold 62 are opened and closed. Further, for example, the surface including the outer surface of the rear end wall 15 in the substrate case 10 is a so-called parting line PL between the fixed mold 61 and the movable mold 62. Further, as shown in FIG. 7, the movable mold 62 includes a movable main body mold 62 </ b> A that mainly molds the inner surface of the substrate case 10, a first slide mold 62 </ b> B that mainly molds the upper surface side of the substrate case 10, and mainly the substrate case 10. The first and second slide molds 62B and 62C are brought into contact with and separated from each other as the movable body mold 62A moves linearly by a cam mechanism (not shown). Move directly. When the injection mold 60 is closed, the substrate case 10 is molded into the injection mold 60 from the movable main body mold 62A, the first and second slide molds 62B and 62C, and the fixed mold 61. A cavity 60C is formed. Further, the fixed mold 61 is provided with a pair of resin injection gates 61G and 61G, and the resin injection gates 61G and 61G are formed in the cavity 60C in the crank bent portions 15A and 15A in the rear end wall 15 of the substrate case 10. An opening is formed at each center of the portion forming the outer surface. Then, the molten resin is injected into the cavity 60C from the resin injection gates 61G and 61G, and the substrate case 10 is molded.

  Next, a method for using the substrate case 10 will be described. The board case 10 is combined with the board 80 and the lid 81 with connector shown in FIG. 8 to become the control unit 90 shown in FIG.

  As shown in FIG. 8, the lid 81 with a connector is a resin molded product having a structure in which a fitting hood 83 is projected from the rear surface of a horizontally long thick plate-like base portion 82 and a connector hood portion 84 is projected from the front surface. Yes, one end of the substrate 80 is fixed inside the fitting hood 83. A control circuit (not shown) is mounted on the substrate 80, and a plurality of terminal fittings (not shown) connected to the control circuit rise from a position near one end of the substrate 80 and are bent at a right angle. These terminal fittings penetrate the base portion 82 and protrude into the connector hood portion 84 to form a connector. Furthermore, screw insertion holes 82 </ b> A are formed through the corner portions positioned at the four corners when the base portion 82 is viewed from the front in the front-rear direction. Further, a waterproof ring 85 (specifically, an O-ring) is attached to the outer surface of the fitting hood portion 83.

  The board case 10 receives the side edges of the board 80 in sliding engagement with the board guide grooves 33 and 33 (see FIG. 4), and the board insertion slot 11 is closed by the lid 81 with a connector. When the lid 81 with the connector is closed, the end of the substrate 80 opposite to the lid 81 with the connector is between the first and second protrusions 34A and 34B of the substrate clamping portion 34 in the substrate case 10. It is pushed and pinched.

  Further, in the process of inserting the substrate 80 into the substrate case 10, the fitting hood portion 83 of the lid 81 with connector is fitted inside the rectangular tube fitting wall 32 of the substrate case 10. And the waterproof ring 85 is crushed between those fitting surfaces (the outer surface of the fitting hood part 83 and the inner surface of the square tube-shaped fitting wall 32), and the inside of the substrate case 10 becomes waterproof. In this state, when the screw 86 is passed through the screw insertion hole 82A of the connector-attached lid 81 and screwed into the screw hole 31A of the substrate case 10, the above-described control unit 90 is completed. The control unit 90 is generally called an ECU (Engine Control Unit or Electric Control Unit), and is mounted on an automobile and used for controlling an automobile engine, a torque converter, and the like. Is electrically connected to the harness.

  The effect of the substrate case 10 of this embodiment is demonstrated. As shown in FIG. 1, the substrate case 10 of the present embodiment has a box-shaped structure with one side opening as a substrate insertion slot 11, so that a conventional substrate is formed by assembling two case components into a box-shaped structure. Compared to the case, the number of parts is reduced, and the manufacturing cost can be reduced. Further, in the substrate case 10 of the present embodiment, as shown in FIG. 6, since the resin injection gate 61G of the injection mold 60 faces the rear end wall 15 having a relatively small area in the flat box-shaped structure, Compared with the case where the resin injection gate 61G is opposed to the substrate facing side walls 13 and 14 having a relatively large outer surface area in the box-shaped structure, the resin pressure applied in the mold opening and closing direction of the injection mold 60 is reduced, and the injection mold is reduced. The size of the mold 60 can be reduced. Also in this respect, in this embodiment, the manufacturing cost of the substrate case 10 can be reduced.

  By the way, when the resin injecting portion 15B is arranged on the rear end wall 15 of the substrate case 10 as described above, a portion of the injection mold 60 where the rectangular tubular fitting wall 32 of the substrate case 10 is molded is made of molten resin. There is concern that it will not flow smoothly. However, in the substrate case 10 of the present embodiment, the rear end is formed on both sides of each outer surface of the pair of substrate facing side walls 13 and 14 corresponding to the pair of resin injection portions 15B and 15B provided on the rear end wall 15. Since the vertical protrusions 41, 42, 51, 52 extending from the lid fixing annular protrusion 30 to the lid fixing annular protrusion 30 are provided, the injection molding die 60 to the part for forming the rectangular tubular fitting wall 32 at the front end of the substrate case 10. As a result, the molten resin flows smoothly, and the shape of the square tube fitting wall 32 is stabilized. Thereby, the waterproof performance by the waterproof ring 85 between the fitting surfaces of the square tube-shaped fitting wall 32 and the fitting hood part 83 of the lid 81 with a connector 81 becomes high. Further, since the plurality of horizontal protrusions 44, 54 orthogonal to the vertical protrusions 41, 42, 51, 52 are provided and intersected in a lattice shape, the strength of the substrate case 10 can be increased. Further, when the vehicle travels, the temperature in the substrate case 10 changes due to heat generation of the substrate 80, etc., but air passes through the inside and outside of the substrate case 10 through the ventilation film 23 (see FIG. 3). It will not be deformed by changes. Furthermore, since the vertical protrusions 41, 42, 51, 52 and the horizontal protrusions 44, 54 have a width and height equal to or less than the wall thickness of the substrate facing side walls 13, 14, distortion of the substrate case 10 due to sink marks is also suppressed. be able to.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various modifications can be made without departing from the scope of the invention. It can be changed and implemented.

DESCRIPTION OF SYMBOLS 10 Board | substrate case 11 Board | substrate insertion port 13,14 Board | substrate opposing side wall 15 Back end wall 15A Each crank bending part 15B Resin injection | pouring part 30 Lid fixed annular protrusion 32 Square cylindrical fitting wall 41,42,51,52 Vertical protrusion 44 , 54 Transverse protrusion 60 Injection mold 80 Substrate 81 Cover with connector 85 Waterproof ring

Claims (3)

This is a resin injection molded product with a flat box-shaped structure. One side of a flat rectangle located at the front end of the box-shaped structure opens as a board insertion slot, and the lid is fixed to the side protruding from the front end position. A board case having an annular protrusion, the front end side of which is a rectangular tube-shaped fitting wall from the lid fixing annular protrusion,
The board is received from the board insertion opening, and the lid with the connector fixed to the end of the board is fitted to the square tube fitting wall, and the fitting surface of the square tube fitting wall and the cover with the connector is fitted. In the board case in which the lid fixing annular protrusion is fixed to the lid with the connector in a state where the waterproof ring is crushed between,
Resin injection portions opposed to the resin injection gates of the injection mold are respectively disposed at positions near both ends in the longitudinal direction of the rear end wall facing the substrate insertion opening,
Each outer surface of the pair of substrate-facing side walls facing each other with the substrate interposed therebetween has a width and a height that extend from the rear end of each outer surface to the lid-fixing annular protrusion and that are equal to or less than the wall thickness of each of the substrate-facing side walls. A substrate case, wherein a plurality of vertical ridges are formed at positions closer to both sides corresponding to the resin injection portion.   2. A part of the plurality of vertical protrusions is arranged at the same position as each of the resin injection portions in the longitudinal direction of the rear end wall among the outer surfaces of the pair of substrate-facing side walls. The board case described in 1.   Each outer surface of the pair of substrate-facing side walls was provided with a plurality of horizontal ridges orthogonal to the plurality of vertical ridges and having a width and height equal to or less than the wall thickness of each of the substrate-facing side walls. The substrate case according to claim 1 or 2.

Images