Housing of electric apparatus, electric apparatus, and circuit board housing case

Abstract

To provide an electric apparatus of a housing, capable of holding a substrate with a structure that the generation of a noise due to vibrations is suppressed.SOLUTION: A housing of an electric apparatus, includes: an open part into which a substrate is inserted; a block wall that is opposite to the open part; and a pair of side walls that is extended from the open part to the block wall, and is opposite each other, and houses the substrate to which a step part of which a width on the open part side is wider than that of the block wall side is provided. The housing of the electric apparatus, includes: a pair of guide parts that is formed so as to be adjacent to the pair of side walls, and is extended in an insertion direction of the substrate, and has a guide surface for guiding the side end part of the substrate along the insertion direction; a first holding part that is arranged so as to be adjacent to the block wall, and holds a tip end part of the substrate; and a second holding part that is adjacent to the side wall, is arranged to the open part side from the first holding part, and holds the step part of the substrate in a state where it is separated in a normal direction on the guide surface.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a housing of an electrical device, an electrical device, and a circuit board storage case.

Background Art

[0002] There is known a housing of an electrical device that houses and holds a substrate of the electrical device such as a printed circuit board in an internal space. Such a housing includes guide portions extending in the insertion direction of the substrate on a pair of side walls facing each other inside the housing. Further, there is known a structure in which a holding portion (restricting portion) for holding the substrate is provided on a closing wall facing the opening of the housing and on a pair of side walls (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above prior art, with the substrate held by the restricting portion, the substrate is in contact with the groove wall (guide surface) of the guide portion facing the substrate. There may be a slight gap between the substrate and the groove wall (guide surface) due to the clearance relationship. Thus, in the prior art, due to the gap, the substrate and the groove wall (guide surface) intermittently come into contact with each other due to vibration, and noise is generated, which has been a problem.

[0005] In view of the above problems, an object of the present invention is to provide a housing of an electrical device, an electrical device, and a circuit board storage case having a structure in which generation of noise due to vibration is suppressed and capable of holding a substrate.

Means for Solving the Problems

[0006] An exemplary aspect of the present invention relates to a housing of an electrical device for accommodating a substrate, the housing having an opening for inserting the substrate, a closing wall facing the opening, and a pair of side walls extending from the opening to the closing wall and facing each other, wherein a stepped portion is provided such that the width on the opening side is wider than that on the closing wall side. The housing includes a pair of guide portions formed adjacent to the pair of side walls and extending in the insertion direction of the substrate, each having a guide surface for guiding a side end portion of the substrate along the insertion direction; a first holding portion disposed adjacent to the closing wall for holding a tip end portion of the substrate; and a second holding portion disposed adjacent to the side wall on the opening side of the first holding portion for holding the stepped portion of the substrate in a state separated from the guide surface in the normal direction.

Advantages of the Invention

[0007] According to the configuration of the present invention, a guide portion and a second holding portion are provided on each of the pair of side walls of the housing. In the second holding portion, the substrate is held in a state separated from the guide surface of the guide portion. Thus, even when vibration occurs in the housing while the substrate is held therein, the substrate and the guide surface do not come into contact with each other. Therefore, in the housing of the electrical device, it is possible to hold the substrate with a structure that suppresses the generation of noise due to vibration.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Best Mode for Carrying Out the Invention

[0009] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. For the convenience of explanation in this document, a three-dimensional orthogonal coordinate system is illustrated. For the electric device 1, the X-axis direction is the "left-right horizontal direction", the Y-axis direction is the "front-back direction", and the Z-axis direction is the "up-down direction". Specifically, the positive direction of the X-axis is the "right side", the negative direction of the X-axis is the "left side", the positive direction of the Y-axis is the "back side (rear side)", the negative direction of the Y-axis is the "front side (front side)", the positive direction of the Z-axis is the "upper side", and the negative direction of the Z-axis is the "lower side". Also, the "orthogonal" and "parallel" referred to here are not strictly limited to being exactly orthogonal and parallel, but also include approximately orthogonal and approximately parallel.

[0010] FIG. 1 is a horizontal cross-sectional plan view of the electric device 1 of the embodiment. FIG. 2 is a partial front view of the electric device 1 in FIG. 1. FIG. 3 is a plan view of the substrate 2 of the electric device 1 in FIG. 1. FIG. 4 is a horizontal cross-sectional plan view of the housing 3 of the electric device 1 in FIG. 1. In FIG. 2, the drawing of the lid member 4 of the electric device 1 is omitted. Also, FIG. 2 shows the part on the right side (positive X-axis direction side) when viewed from the front of the electric device 1, but the part on the left side (negative X-axis direction side) has the same structure.

[0011] The electric device 1 is a control device mounted on a vehicle such as an automobile. The electric device 1 may be mounted on a moving body other than a vehicle, or may be mounted on something other than a moving body. Examples of moving bodies other than vehicles may include ships, airplanes, robots, etc. The electric device 1 is electrically connected to other devices via the connector 5 shown in FIGS. 1 and 2.

[0012] The electric device 1 includes a substrate 2, a housing 3, and a lid member 4.

[0013] The substrate 2 is, for example, a printed circuit board, and various components are mounted on the main surface 2a. The connector 5 is one of the components mounted on the substrate 2. The connector 5 is fixed to the front side (the negative Y-axis direction side) of the substrate 2. A harness or the like is electrically connected to the connector 5 from the front side of the electric device 1.

[0014] The substrate 2 is inserted into and housed in the housing 3 from the tip of the back side (the positive Y-axis direction side). That is, the substrate 2 is inserted into the housing 3 in parallel with the lower wall 3d of the housing 3 along the front-rear direction (the Y-axis direction). In the assembled state of the electric device 1, the main surface 2a of the substrate 2 extends in the left-right horizontal direction (the X-axis direction) and the front-rear direction (the Y-axis direction). That is, the substrate 2 is fixed in the housing 3 in parallel with the lower wall 3d.

[0015] The substrate 2 is flat and is formed in a substantially rectangular shape in plan view. Specifically, the substrate 2 is provided with a stepped portion 2b at the central portion in the front-rear direction (the Y-axis direction). The stepped portion 2b is formed at both the left and right ends of the substrate 2. The width L1 in the left-right horizontal direction (the X-axis direction) on the front side (the negative Y-axis direction side) of the substrate 2 than the stepped portion 2b is wider than the width L2 in the left-right horizontal direction on the back side (the positive Y-axis direction side) of the substrate 2 than the stepped portion 2b. That is, the substrate 2 is provided with a stepped portion 2b having a wider width on the opening side 3a (the negative Y-axis direction side) than the closing wall 3b side described later at both the left and right ends. In other words, the substrate 2 is a rectangular circuit board having a wider width on the rear end side in the insertion direction into the housing 3 than the front end side.

[0016] The housing 3 is formed in a rectangular parallelepiped cylindrical body extending in the front-rear direction (the Y-axis direction) when viewed from the front side (the negative Y-axis direction side). The housing 3 is formed of, for example, a synthetic resin, but is not limited thereto. The housing 3 is a circuit board housing case that houses the substrate 2 therein. The housing 3 has an opening 3a, a closing wall (first side wall) 3b, an upper wall 3c, a lower wall 3d, and a pair of side walls (second side walls) 3e.

[0017] The opening 3a is located at the end on the front side (negative Y-axis direction) of the housing 3. The opening 3a extends in the left-right horizontal direction (X-axis direction) and the up-down direction (Z-axis direction). The closing wall 3b is located at the end on the back side (positive Y-axis direction) of the housing 3 and faces the opening 3a in the front-back direction. The closing wall 3b is formed in a flat plate shape extending in the left-right horizontal direction and the up-down direction. The closing wall 3b closes the end on the back side of the housing 3 which is a cylindrical body.

[0018] The housing 3 is formed into a rectangular parallelepiped cylindrical body by connecting an upper wall 3c, a lower wall 3d, and a pair of side walls 3e, each formed in a flat plate shape. The upper wall 3c, the lower wall 3d, and the pair of side walls 3e are formed in a flat plate shape extending in the front-back direction (Y-axis direction) from the opening 3a to the closing wall 3b. The pair of side walls 3e are arranged between the upper wall 3c and the lower wall 3d facing each other in the left-right horizontal direction (X-axis direction).

[0019] The lid member 4 is arranged on the front side (negative Y-axis direction) of the electric device 1. The lid member 4 extends in the left-right horizontal direction and the up-down direction and detachably closes the opening 3a of the housing 3. The lid member 4 is formed of, for example, synthetic resin, but is not limited thereto. The lid member 4 has a window portion 4a and a pair of locking pieces 4b.

[0020] The window portion 4a is formed in a rectangular shape as viewed from the front side at the center of the lid member 4 and penetrates the lid member 4 in the front-back direction (Y-axis direction). In the assembled state of the electric device 1, the connector 5 is exposed to the outside through the window portion 4a of the lid member 4. Thereby, a harness or the like can be connected to the connector 5 from the front side of the electric device 1.

[0021] The pair of locking pieces 4b are arranged at both ends in the left-right horizontal direction (X-axis direction) of the lid member 4. The pair of locking pieces 4b are formed in a flat plate shape that is rectangular as viewed from the lateral direction extending in the front-back direction (Y-axis direction) and the up-down direction (Z-axis direction). In the assembled state of the electric device 1, the pair of locking pieces 4b are located outside of the pair of side walls 3e of the housing 3 respectively. The locking piece 4b has a hole portion 4c arranged at its center and penetrating in the left-right horizontal direction.

[0022] Regarding the pair of locking pieces 4b, a pair of convex portions 3f are formed on each of the pair of side walls 3e of the housing 3. The convex portion 3f is located at the front end portion on the outer side of the side wall 3e and adjacent to the locking piece 4b of the lid member 4. In the assembled state of the electric device 1, the pair of convex portions 3f are inserted into the hole portions 4c of each of the pair of locking pieces 4b. The lid member 4 is detachably attached to the housing 3 by elastically deforming the locking piece 4b to connect and disconnect from the convex portion 3f in a snap-fit manner.

[0023] Next, the details of the housing 3 will be described. FIG. 5 is a partial perspective view of the housing 3 as viewed from the front side. FIG. 6 is a vertical cross-sectional perspective view taken along line VI-VI at the right end of the electric device 1 in FIG. 2. FIGS. 5 and 6 show the periphery of the side wall 3e on the right side (the positive X-axis direction side) as viewed from the front of the housing 3, and the periphery of the side wall 3e on the left side (the negative X-axis direction side) has a similar structure.

[0024] The housing 3 has a pair of guide portions 3g, a first holding portion 31, and a second holding portion 32.

[0025] As shown in FIG. 2, in the present embodiment, the housing 3 has a set of a pair of guide portions 3g, a first holding portion 31, and a second holding portion 32 at two locations on the upper side (the positive Z-axis direction side) and the lower side (the negative Z-axis direction side) inside the housing 3. The pair of guide portions 3g, the first holding portion 31, and the second holding portion 32 on the upper and lower sides respectively have a symmetric configuration in the vertical direction. In the following description, the pair of guide portions 3g, the first holding portion 31, and the second holding portion 32 on the lower side inside the housing 3 will be described.

[0026] The pair of guide portions 3g are formed adjacent to the inside of each of the pair of left and right side walls 3e of the housing 3. The guide portion 3g extends along the front-rear direction (Y-axis direction) of the housing 3, that is, the insertion direction of the substrate 2. The guide portion 3g has a guide surface (substrate guide surface) 3gf. The guide surface 3gf extends from the inner surface of the side wall 3e into the housing 3 in a direction intersecting the side wall 3e, that is, the left-right horizontal direction (X-axis direction). The guide surface 3gf faces the substrate 2 inserted into the housing 3 and guides the side end portion of the substrate 2 along the insertion direction (Y-axis direction).

[0027] The first holding portion 31 is disposed adjacent to the inside of the closing wall 3b of the housing 3. The first holding portion 31 is formed at two locations adjacent to the inside of each of the pair of left and right side walls 3e and at one location at the center in the left and right lateral direction (X-axis direction) (see FIGS. 1 and 4).

[0028] The first holding portion 31 is formed as a recess that is recessed from the front side toward the back side in the front-rear direction (Y-axis direction). In other words, the first holding portion 31 extends toward the opening 3a side of the housing 3. The first holding portion 31 holds the tip portion (Y-axis positive direction end portion) of the substrate 2 in the front-rear direction (Y-axis direction) by sandwiching the substrate 2 in the vertical direction (Z-axis direction). The first holding portion 31 has an insertion port 31a, an upper surface 31b, a lower surface 31c, and a rib portion 31d.

[0029] The insertion port 31a is located at the end on the front side (Y-axis negative direction side) of the first holding portion 31. The insertion port 31a extends in the left and right lateral direction (X-axis direction) and the vertical direction (Z-axis direction). The tip portion of the substrate 2 inserted into the housing 3 passes through the insertion port 31a and is inserted into the first holding portion 31.

[0030] The upper surface 31b and the lower surface 31c extend in the left and right lateral direction (X-axis direction) and the front-rear direction (Y-axis direction) above and below the first holding portion 31 which is a recess. The upper surface 31b and the lower surface 31c face the substrate 2 in the vertical direction and sandwich and hold the substrate 2 therebetween.

[0031] The rib portion 31d is formed on the lower surface 31c. The rib portion 31d protrudes upward (Z-axis positive direction) from the lower surface 31c toward the upper surface 31b. The shape of the rib portion 31d as viewed from the front side is, for example, a triangular shape having a vertex at the upper end.

[0032] The distance from the top of the rib portion 31d to the upper surface 31b before the substrate 2 is inserted into the first holding portion 31 is shorter than the thickness of the substrate 2. The rib portion 31d is a so-called crush rib. When the substrate 2 is inserted into the first holding portion 31, the tip portion of the substrate 2 is pressed against the rib portion 31d which is a crush rib, crushing the rib portion 31d, and is held in the first holding portion 31 by the reaction force.

[0033] The second holding portion 32 is disposed adjacent to the inside of the side wall 3e of the housing 3. The second holding portion 32 is formed at the center in the front-rear direction (Y-axis direction) of the side wall 3e corresponding to the position of the step portion 2b of the substrate 2 in the state of being inserted into the housing 3. That is, the second holding portion 32 is disposed closer to the opening 3a side than the first holding portion 31. Further, on each of the pair of side walls 3e, a stepped portion 3e1 is provided at a position corresponding to the position of the step portion 2b of the substrate 2, and the width on the opening 3a side is wider than that on the closing wall 3b side.

[0034] The second holding portion 32 is formed as a recess that is recessed from the front side to the rear side in the front-rear direction (Y-axis direction). In other words, the second holding portion 32 extends toward the opening 3a side of the housing 3. The second holding portion 32 holds the step portions 2b at the side end portions in the left-right lateral direction (X-axis direction) of the substrate 2 by sandwiching the substrate 2 in the up-down direction (Z-axis direction). The second holding portion 32 has an insertion port 32a, an upper surface 32b, a lower surface 32c, and a rib portion 32d.

[0035] The insertion port 32a is located at the end portion on the front side (Y-axis negative direction side) of the second holding portion 32. The insertion port 32a extends in the left-right lateral direction (X-axis direction) and the up-down direction (Z-axis direction). The side end portions of the step portion 2b of the substrate 2 inserted into the housing 3 pass through the insertion port 32a and are inserted into the second holding portion 32.

[0036] The upper surface 32b and the lower surface 32c extend in the left-right lateral direction (X-axis direction) and the front-rear direction (Y-axis direction) above and below the second holding portion 32 which is a recess. The upper surface 32b and the lower surface 32c face the substrate 2 in the up-down direction and sandwich and hold the substrate 2 therebetween.

[0037] The rib portion 32d is formed on the lower surface 32c. The rib portion 32d protrudes upward (Z-axis positive direction) from the lower surface 32c toward the upper surface 32b. The shape of the rib portion 32d as viewed from the front side is, for example, a triangular shape having a vertex at the upper end.

[0038] Before the substrate 2 is inserted into the second holding portion 32, the distance from the top of the rib portion 32d to the upper surface 32b is shorter than the thickness of the substrate 2. The rib portion 32d is a so-called crush rib. When the substrate 2 is inserted into the second holding portion 32, the side end portion of the stepped portion 2b of the substrate 2 is pressed against the rib portion 32d which is a crush rib, crushing the rib portion 32d, and is held by the second holding portion 32 by the reaction force.

[0039] Also, the second holding portion 32 is disposed above (on the positive Z-axis direction side) the guide surface 3gf of the guide portion 3g. In other words, the second holding portion 32 is separated from the guide surface 3gf in the normal direction of the guide surface 3gf from above the guide surface 3gf. And the second holding portion 32 holds the stepped portion 2b of the substrate 2 in a state of being separated from the guide surface 3gf in the normal direction of the guide surface 3gf from above the guide surface 3gf.

[0040] According to the above configuration, even if vibration occurs in the housing 3 while the substrate 2 is held in the housing 3, the substrate 2 and the guide surface 3gf do not come into contact. Therefore, in the housing 3 of the electric device 1, it is possible to hold the substrate 2 with a structure in which generation of noise due to vibration is suppressed.

[0041] Also, the first holding portion 31 is disposed above (on the positive Z-axis direction side) the guide surface 3gf of the guide portion 3g. In other words, the first holding portion 31 is separated from the guide surface 3gf in the normal direction of the guide surface 3gf from above the guide surface 3gf. And the first holding portion 31 holds the tip portion of the substrate 2 in a state of being separated from the guide surface 3gf in the normal direction of the guide surface 3gf from above the guide surface 3gf.

[0042] According to the above configuration, also with respect to the first holding portion 31, even if vibration occurs in the housing 3 while the substrate 2 is held in the housing 3, the substrate 2 and the guide surface 3gf do not come into contact. Therefore, in the housing 3 of the electric device 1, it is possible to hold the substrate 2 with a structure in which generation of noise due to vibration is suppressed.

[0043] The insertion ports 31a of the first holding portion 31 and the insertion ports 32a of the second holding portion 32 face the direction in which the opening 3a of the housing 3 is located. In other words, the insertion ports 31a and 32a face the opening 3a side in the insertion direction (front-rear direction (Y-axis direction)) of the substrate 2.

[0044] According to the above configuration, as the substrate 2 is inserted into the housing 3, the tip and side ends of the substrate 2 pass through the insertion port 31a or the insertion port 32a and are inserted into the first holding portion 31 or the second holding portion 32, respectively. Therefore, the substrate 2 inserted into the housing 3 can be easily held by the first holding portion 31 and the second holding portion 32.

[0045] Further, the first holding portion 31 has inclined surfaces 31e. The inclined surfaces 31e are disposed on the upper and lower sides of the front side of the insertion port 31a of the first holding portion 31, respectively. Similarly, the second holding portion 32 has inclined surfaces 32e. The inclined surfaces 32e are disposed on the upper and lower sides of the front side of the insertion port 32a of the second holding portion 32, respectively.

[0046] The upper inclined surfaces 31e and 32e are inclined downward toward the insertion ports 31a and 32a as they approach the insertion ports 31a and 32a from the opening 3a of the housing 3 along the insertion direction (front-rear direction (Y-axis direction)) of the substrate 2. The lower inclined surfaces 31e and 32e are inclined upward toward the insertion ports 31a and 32a so as to be away from the guide surface 3gf as they approach the insertion ports 31a and 32a from the opening 3a of the housing 3 along the insertion direction (front-rear direction (Y-axis direction)) of the substrate 2.

[0047] According to the above configuration, as the substrate 2 is inserted into the housing 3, the tip of the substrate 2 naturally enters the first holding portion 31 along the inclination of the inclined surface 31e, and the side end of the stepped portion 2b of the substrate 2 naturally enters the second holding portion 32 along the inclination of the inclined surface 32e. Thus, by holding the substrate 2 with the first holding portion 31 and the second holding portion 32, the substrate 2 can be separated from the guide surface 3gf. Therefore, the substrate 2 inserted into the housing 3 can be easily held in a state separated from the guide surface 3gf.

[0048] Also, as described above, the housing 3 has a plurality (two in this embodiment) of sets of a pair of guide portions 3g, a first holding portion 31, and a second holding portion 32. The two sets of the pair of guide portions 3g, the first holding portion 31, and the second holding portion 32 are arranged in the vertical direction (Z-axis direction), in other words, juxtaposed in the normal direction of the guide surface 3gf.

[0049] According to the above configuration, the substrate 2 can be accommodated in the upper part of the housing 3 by changing the orientation of the main surface 2a of the substrate 2. At this time, in either the upper or lower side within the housing 3, the second holding portion 32 can hold the side end portion of the step portion 2b of the substrate 2 in a state separated from the guide surface 3gf. That is, even when the substrate 2 is accommodated in the upper part of the housing 3 with its orientation changed, it is possible to suppress the generation of noise due to vibration and hold the substrate 2.

[0050] Subsequently, the details of the lid member 4 will be described. FIG. 7 is a partial perspective view seen from the back side of the lid member 4 of the electric device 1 in FIG. 1. FIG. 8 is a vertical cross-sectional perspective view taken along line VI-VI around the lid member 4 of the electric device 1 in FIG. 2. FIGS. 7 and 8 show the periphery of the side wall 3e on the right side (the positive X-axis direction side) when viewed from the front of the housing 3, but the periphery of the side wall 3e on the left side (the negative X-axis direction side) has the same structure.

[0051] The lid member 4 has a third holding portion 41. The third holding portion 41 is disposed at a location inside the lid member 4 adjacent to the side wall 3e of the housing 3 in the assembled state of the electric device 1. The third holding portion 41 is formed on the front side (the negative Y-axis direction side) of the guide portion 3g of the housing 3.

[0052] The third holding portion 41 is formed as a recess that is recessed from the back side to the front side in the front-rear direction (Y-axis direction). The third holding portion 41 holds the rear end portion (the negative Y-axis end portion) of the substrate 2 in the front-rear direction (Y-axis direction) by sandwiching the substrate 2 in the vertical direction (Z-axis direction). In other words, the third holding portion 41 holds the end portion of the substrate 2 on the connector 5 side in the front-rear direction. The third holding portion 41 has an insertion port 41a, an upper surface 41b, a lower surface 41c, a rib portion 41d, and an inclined surface 41e.

[0053] The insertion port 41a is located at the end on the back side (the positive Y-axis direction side) of the third holding part 41. The insertion port 41a extends in the left-right horizontal direction (X-axis direction) and the up-down direction (Z-axis direction). The insertion port 41a faces in the direction in which the housing 3 is located in the front-back direction (Y-axis direction). The rear end part of the substrate 2 passes through the insertion port 41a and is inserted into the third holding part 41.

[0054] The upper surface 41b and the lower surface 41c extend in the left-right horizontal direction (X-axis direction) and the front-back direction (Y-axis direction) above and below the third holding part 41 which is a recess. The upper surface 41b and the lower surface 41c face the substrate 2 in the up-down direction and hold the substrate 2 therebetween with the substrate 2 sandwiched.

[0055] The rib part 41d is formed on the lower surface 41c. The rib part 41d protrudes upward (the positive Z-axis direction) from the lower surface 41c toward the upper surface 41b. The shape of the rib part 41d as viewed from the back side is, for example, a triangular shape having a vertex at the upper end.

[0056] The distance from the top of the rib part 41d to the upper surface 41b before the substrate 2 is inserted into the third holding part 41 is shorter than the thickness of the substrate 2. The rib part 41d is a so-called crush rib. When the substrate 2 is inserted into the third holding part 41, the tip part of the substrate 2 is pressed against the rib part 41d which is a crush rib to crush the rib part 41d, and is held by the third holding part 41 by the reaction force.

[0057] Also, the third holding part 41 is disposed above (the positive Z-axis direction side) the guide surface 3gf of the guide part 3g. In other words, the third holding part 41 is separated from the guide surface 3gf in the normal direction of the guide surface 3gf from above the guide surface 3gf. And the third holding part 41 holds the rear end part of the substrate 2 in a state of being separated from the guide surface 3gf in the normal direction of the guide surface 3gf from above the guide surface 3gf.

[0058] The inclined surfaces 41e are respectively arranged on the upper side and the lower side on the back side of the insertion port 41a of the third holding part 41. The upper inclined surface 41e inclines downward toward the insertion port 41a as it approaches the insertion port 41a from the housing 3 side along the insertion direction (front-rear direction (Y-axis direction)) of the substrate 2. The lower inclined surface 41e inclines upward toward the insertion port 41a so as to move away from the guide surface 3gf as it approaches the insertion port 41a from the housing 3 side along the insertion direction (front-rear direction (Y-axis direction)) of the substrate 2.

[0059] According to the above configuration, also in the lid member 4, the substrate 2 can be held by the third holding part 41 in a state of being separated from the guide surface 3gf. Further, the rear end portion of the substrate 2 naturally enters into the third holding part 41 along the inclination of the inclined surface 41e. Thereby, it is possible to easily guide the substrate 2 into the third holding part 41.

[0060] Note that the first holding part 31, the second holding part 32, and the third holding part 41 are formed to have the same height in the vertical direction (Z-axis direction). Specifically, the lower surface 31c of the first holding part 31, the lower surface 32c of the second holding part 32, and the lower surface 41c of the third holding part 41 are separated by the same distance in the normal direction of the guide surface 3gf from above the guide surface 3gf. Thereby, the substrate 2 is held in parallel in the housing 3 while maintaining a constant distance from the guide surface 3gf. Therefore, in the housing 3 of the electric device 1, it is possible to hold the substrate 2 with a structure in which the generation of noise due to vibration is surely suppressed.

[0061] Also, in the present embodiment, the housing 3 has two pairs of guide parts 3g, a first holding part 31, and a second holding part 32 in the vertical direction (Z-axis direction). On the other hand, the lid member 4 has a single third holding part 41 in the vertical direction (Z-axis direction). The third holding part 41 faces one of the two pairs of guide parts 3g, the first holding part 31, and the second holding part 32 (the lower side in the present embodiment) in the insertion direction of the substrate 2.

[0062] When the holding position of the substrate 2 is on the upper side (the +Z-axis direction side) inside the housing 3, the lid member 4 is attached to the housing 3 with the lid member 4 upside down so that the third holding portion 41 is on the upper side. In other words, the lid member 4 is attached to the housing 3 by reversing the direction of the lid member 4 in the normal direction (the vertical direction (Z-axis direction)) of the guide surface 3gf. Thereby, it is not necessary to provide the third holding portion 41 at two locations, the upper side (+Z-axis direction side) and the lower side (−Z-axis direction side), and it becomes possible to simplify the configuration of the lid member 4.

[0063] <Matters Needing Attention, etc.> Various technical features disclosed as embodiments in this specification can be variously modified without departing from the gist of the technical creation. That is, the above embodiments are illustrative in all respects and not restrictive. The technical scope of the present invention is shown not by the description of the above embodiments but by the scope of the claims, and includes all modifications belonging to the meaning and scope equivalent to the scope of the claims. Also, a plurality of embodiments shown in this specification may be implemented in appropriate combination within the possible range.

Description of Reference Numerals

[0064] 1 Electric device 2 Substrate 2b Step portion 3 Housing 3a Opening 3b Closing wall (first side wall) 3e Side wall (second side wall) 3g Guide portion 3gf Guide surface (substrate guide surface) 4 Lid member 31 First holding portion 31a Insertion port 31e Inclined surface 32 Second holding portion 32a Insertion port 32e Inclined surface 41 Third holding portion 41a Insertion port 41e Inclined surface

Claims

1. A housing for an electrical device that houses a substrate having an opening for inserting the substrate, a closing wall facing the opening, and a pair of side walls extending from the opening to the closing wall and facing each other, and having a stepped portion with a wider width on the opening side than on the closing wall side, a pair of guide portions formed adjacent to the pair of side walls, extending in the insertion direction of the substrate, and having guide surfaces for guiding side end portions of the substrate along the insertion direction, a first holding portion disposed adjacent to the closing wall for holding a tip portion of the substrate, a second holding portion disposed adjacent to the side wall on the opening side of the first holding portion for holding the stepped portion of the substrate in a state of being separated from the guide surface in the normal direction, and having, a housing of an electrical device.

2. The housing of the electrical device according to claim 1, wherein the first holding portion holds the tip portion of the substrate in a state of being separated from the guide surface in the normal direction.

3. The housing of the electrical device according to claim 2, wherein the first holding portion and the second holding portion have the same distance in the normal direction from the guide surface.

4. The housing of the electrical device according to claim 1 or claim 2, wherein insertion ports of the first holding portion and the second holding portion face the direction in which the opening is located.

5. The housing of the electrical device according to claim 4, wherein the first holding portion and the second holding portion have inclined surfaces that incline toward the insertion port so as to be separated from the guide surface as they approach the insertion port from the opening.

6. The housing of the electrical device according to claim 1 or claim 2, wherein a set of the pair of guide portions, the first holding portion, and the second holding portion are juxtaposed in the normal direction of the guide surface.

7. An electrical device comprising the housing of the electrical device according to claim 1 or claim 2, and a lid member that covers the opening of the housing.

8. The electrical device according to claim 7, wherein the lid member has a third holding portion for holding the substrate.

9. The electrical device according to claim 8, wherein the third holding portion holds the substrate in a state of being separated from the guide surface in the normal direction.

10. The housing of the electrical device according to claim 9, wherein the first holding portion, the second holding portion, and the third holding portion have the same distance in the normal direction from the guide surface.

11. The housing of the electrical device has two sets of a pair of the guide portions, the first holding portion, and the second holding portion juxtaposed in the normal direction of the guide surface, The electrical device according to claim 8, wherein the lid member has the third holding portion that faces one of the two sets in the insertion direction by changing the direction of the normal line of the guide surface.

12. An opening sized to insert a rectangular circuit board whose width at the rear end side in the insertion direction is wider than that at the front end side, A first side wall that contacts the front end portion of the circuit board, A pair of second side walls that extend from the first side wall to the opening and face each other, and are provided with stepped portions whose width on the opening side is wider than that on the first side wall side, and that can accommodate the circuit board, A substrate guide surface formed on the pair of second side walls, A first holding portion formed on the first side wall and extending toward the opening side, A second holding portion formed on the stepped portion and extending toward the opening side, And having Holding the circuit board by the first holding portion and the second holding portion at a position spaced apart from the substrate guide surface in the normal direction. A circuit board storage case.

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