Storage case and assembly method

Abstract

To provide a housing case in which rattling, or noise and the like caused by it is reduced so that production of scraped waste may be prevented when assembling the housing case.SOLUTION: A housing case 1 comprises: a base 10 on which a substrate 30 is mounted; and a cover 20 which is fitted to the base such that it houses the substrate in its inside. The cover has: an upper surface part 21; a lateral part 22 extending from the upper surface part and covering the periphery of the base; a bent part 23 which is formed at an end portion of the lateral part and is bent outward with a curvature; a cut surface part 24 which is formed in an area, other than the bent part, of the end portion 26, with its cut surface facing the base; and a claw part 25 which extends from the end portion and is engaged with the base. The base has: a bottom part 11; a wall part 12 which is erected from the bottom part and is fitted to the inside of the lateral part; a sliding part 13, formed on an outer lateral surface of the wall part, on which the bent part 23 or an inner surface of the lateral part slides when the cover is fitted; and a contact part 14 which is formed on the outside of the wall part and comes into contact with the cut surface. The claw part is engaged with the base, and the contact part comes into contact with the cut surface.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a storage case and a method for assembling the storage case. [Background technology]

[0002] Conventionally, there have been known assembly methods for reducing rattling and resulting abnormal noise caused by vibration and suppressing the generation of shavings when assembling a storage case that is mounted on a moving object such as a vehicle and contains a printed circuit board or the like inside.

[0003] For example, Patent Document 1 discloses a method of assembling a storage case including a base having a substrate and a box-shaped cover that is open on the bottom side and is attached to the base so as to cover the top side of the substrate. In this assembly method, anti-rattle protrusions are provided at multiple locations on the periphery of the substrate, which contact the open-side edge of the cover positioned at the attachment position relative to the base from the outside, and a slope is formed on the inside of the anti-rattle protrusions, which press the open-side edge to elastically deform the circumferential wall of the cover inward and apply a reaction force in the direction in which the cover moves away from the substrate. Next, a crimping protrusion is formed on the open-side edge of the cover, which is bent toward the bottom side of the substrate to hold the cover in the attachment position against the reaction force. Furthermore, the outer surface of the open-side edge of the cover is pressed from the outside to elastically deform the circumferential wall of the cover inward to avoid contact between the open-side edge of the cover and the anti-rattle protrusions, and the cover is moved to the attachment position relative to the base, and the positioning is performed so that the open-side edge and the anti-rattle protrusions come into contact when positioning is completed. Finally, the crimping protrusion of the cover that has been positioned is bent toward the lower surface of the base portion to perform crimping. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2005-340700 A Summary of the Invention [Problem to be solved by the invention]

[0005] Since the shavings generated during assembly can adversely affect the quality of the stored printed circuit boards, etc., it is important to prevent the generation of the shavings in the storage case. In the above-mentioned conventional technology, in order to prevent the generation of the shavings, the anti-rattle protrusions are configured to elastically deform the cover peripheral wall inward, and the rubbing between the anti-rattle protrusions and the cover peripheral wall during assembly is prevented, thereby preventing the generation of the shavings.

[0006] This is not the only method for avoiding shavings. For example, a structure is known in which the edge of the periphery of the cover that rubs against the base is bent with a slight outward curvature to prevent the angular edge of the cover from scraping the side of the base and causing shavings. In a storage case having this structure, when the cover is pushed into the base to be assembled (attached), the tip of the bent part of the cover stops when it abuts on the stopper part of the base, and in this state, the claw part of the cover is bent and crimped to assemble the two. However, with this method, the bent part is often formed by press processing other than shear processing (for example, squeezing, bending, etc.; hereinafter, referred to as squeezing, etc.), and if the dimensional accuracy of the bent part in the cover attachment / detachment direction is not high, there is a problem that a part that cannot abut between the bent part and the stopper part is formed, resulting in a gap and making the case prone to rattling.

[0007] The present invention has been devised in consideration of the above circumstances, and provides a storage case and a method for assembling the storage case that reduces rattling and resulting abnormal noises in a storage case that houses a printed circuit board or the like inside, and suppresses the generation of shavings when assembling the storage case. [Means for solving the problem]

[0008] In order to solve the above problems, there is provided a storage case comprising a base carrying a substrate and a cover attached to the base so as to house the substrate therein, wherein the cover has a top surface portion, a side portion extending from the top surface portion and covering the periphery of the base, a folded portion formed at the end of the side portion and bent with an outward curvature, a cut surface portion formed at the end portion other than the folded portion and with its cut surface facing the base, and a claw portion extending from the end portion and engaging with the base, wherein the base has a base portion, a wall portion standing from the base portion and fitting into the inside of the side portion, a sliding portion formed on the outer side surface of the wall portion against which the folded portion or the inner surface of the side portion slides when the cover is attached, and an abutment portion formed on the outside of the wall portion and abutting the cut surface, wherein the claw portion engages with the base and the abutment portion abuts the cut surface. With this, a storage case is provided in which the end of the cover is bent with an outward curvature and a cut surface portion with high dimensional accuracy in the direction in which the cover is attached, and by abutting the cut surface with the base, rattling and resulting abnormal noises are reduced, and the generation of shavings during assembly is suppressed.

[0009] Furthermore, the abutment portion may protrude from the base portion toward the cover on the outside of the wall portion, and the length from the upper surface portion of the cut surface portion to the cut surface may be shorter than the length from the upper surface portion of the folded portion to the tip of the folded portion. According to this, by making the abutment portion convex and making the length of the cut surface portion shorter than that of the bent portion, the dimensional accuracy of the cut surface portion can be easily ensured during the manufacturing process (when the cover is pressed), and when the cover is placed over the base, the bent portion contacts and is guided against the base before the cut surface portion, thereby reducing the generation of shavings due to the cut surface portion.

[0010] Furthermore, the sliding portion may be characterized in that the cut surface portion protrudes outwardly from the wall portion beyond an outer side surface of the opposing wall portion. With this, since the cut surface portion protrudes outward beyond the outer side surface of the opposing wall portion, the inner surfaces of the folded portion and the side portion are pressed against the sliding portion when they slide over the sliding portion, and this elastic deformation increases the clearance between the cut surface portion and the outer side surface of the wall portion, making it possible to more reliably avoid contact with the cut surface portion.

[0011] In order to solve the above problems, there is provided a method for assembling a storage case including a base carrying a substrate and a cover attached to the base so as to house the substrate therein, the method including forming in the cover a folded portion bent with an outward curvature at the end of a side portion covering the periphery of the base, a cut surface portion with a cut surface facing the base at the end other than the folded portion, and a claw portion extending from the end portion and engaging with the base, and forming in the base a wall portion rising from a base portion and fitting into the inside of the side portion, a sliding portion on the outer side surface of the wall portion against which the folded portion slides when the cover is attached, and an abutment portion on the outside of the wall portion that abuts against the cut surface, aligning so that the folded portion and the sliding portion and the cut surface portion and the abutment portion correspond to each other, sliding the folded portion or the inner surface of the side portion against the sliding portion while pushing the cover into the base, and stopping the pushing when the cut surface abuts against the abutment portion and engaging the claw portion with the base. According to this, a method of assembling a storage case is provided in which a bent portion that is bent with an outward curvature and a cut surface portion with high dimensional accuracy in the direction in which the cover is attached are formed at the end of the cover, the bent portion and the sliding portion and the cut surface portion and the abutting portion are aligned so that they correspond, and the bent portion etc. is slid against the sliding portion while being pushed until the cut surface abuts against the abutting portion, thereby reducing rattling and resulting abnormal noises and suppressing the generation of shavings during assembly.

[0012] In order to solve the above problems, a method for assembling a storage case including a base carrying a substrate and a cover attached to the base so as to house the substrate therein is provided, the cover having a top surface, a side portion extending from the top surface and covering the periphery of the base, a bent portion formed at an end of the side portion and bent with an outward curvature, a cut surface portion formed at an end other than the bent portion and with a cut surface facing the base, and a claw portion extending from the end portion and engaging with the base, the base having a base portion and a claw portion extending from the end portion and engaging with the base. the cover has a wall portion that rises from the base and fits inside the side portion, a sliding portion that is formed on the outer side surface of the wall portion and against which the bent portion or the inner surface of the side portion slides when the cover is attached, and an abutment portion that is formed on the outside of the wall portion and abuts against the cut surface, the method includes aligning the bent portion and the sliding portion, and the cut surface portion and the abutment portion so that they correspond to each other, pushing the cover into the base while sliding the bent portion or the inner surface of the side portion against the sliding portion, and stopping the pushing when the cut surface abuts against the abutment portion and engaging the claw portion with the base. According to this, a method of assembling a storage case is provided which uses a cover having a bent portion at the end which is bent with an outward curvature and a cut surface portion with high dimensional accuracy in the direction in which the cover is attached, and a base having a sliding portion on the outer side of the wall portion against which the bent portion etc. slides and an abutment portion on the outside of the wall portion against which the cut surface abuts, and aligns the bent portion and the sliding portion, and the cut surface portion and the abutment portion so that they correspond, and slides the bent portion etc. against the sliding portion while pushing it in until the cut surface abuts against the abutment portion, thereby reducing rattling and resulting abnormal noises, and suppressing the generation of shavings during assembly. Effect of the Invention

[0013] As described above, according to the present invention, it is possible to provide a storage case and a method for assembling the storage case that reduce rattling and resulting abnormal noises in a storage case that houses a printed circuit board or the like inside, and that suppresses the generation of shavings when assembling the storage case. [Brief description of the drawings]

[0014] [Figure 1]1A is a plan view, (B) a front view, (C) a rear view, (D) a bottom view, (E) a right side view, and (F) a left side view of a storage case of a first embodiment of the present invention. [Diagram 2] 1A is a perspective view from above, and FIG. 1B is a perspective view from below of a storage case according to a first embodiment of the present invention. [Diagram 3] 1A is a plan view, (B) a front view, (C) a rear view, (D) a bottom view, (E) a right side view, and (F) a left side view of a base according to a first embodiment of the present invention. [Figure 4] 1A is a perspective view from above, and FIG. 1B is a perspective view from below of a base according to a first embodiment of the present invention. [Diagram 5] 3 of the base of the first embodiment of the present invention, (A) an enlarged view of part A, (B) an enlarged view of part B, (C) an enlarged view of part C, (D) an enlarged view of part D, (E) an enlarged view of part E, (F1) an enlarged view of part F, and (F2) an enlarged view of part F with the lines indicating the outline of the abutment portion and the base removed to make it easier to see the difference in thickness of the sliding portion. [Figure 6] 1A is a plan view, (B) a front view, (C) a rear view, (D) a bottom view, (E) a right side view, and (F) a left side view of a cover of a first embodiment of the present invention. [Figure 7] 1A and 1B are a top perspective view and a bottom perspective view, respectively, of a cover according to a first embodiment of the present invention. [Figure 8] 7A is a cross-sectional view of a cover of a first embodiment of the present invention taken along line GG in FIG. 6 (cross-section including a bent portion), (B) is a cross-sectional view of line II in FIG. 6 (cross-section including a cut surface portion), (C) is an enlarged view of portion H, and (D) is an enlarged view of portion J. [Figure 9] FIG. 2 is an exploded view of the storage case according to the first embodiment of the present invention, as viewed from above. [Figure 10] FIG. 2 is an exploded view of the storage case according to the first embodiment of the present invention, as viewed from below. [Figure 11] 1A is an exploded assembly diagram seen from above, and FIG. 1B is an exploded assembly diagram seen from below, when aligning the folding portion and the sliding portion, and the cutting surface portion and the abutment portion of the storage case of the first embodiment of the present invention so that they correspond to each other. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, embodiments of the present invention will be described with reference to the drawings. <First Example> 1 to 11, the storage case 1 in this embodiment will be described. The storage case 1 is a case mounted on a moving body such as a vehicle and for housing a board 30 and the like therein, and constitutes, for example, an ECU (Electric Control Unit) for controlling various components such as a motor mounted on the vehicle. However, the present invention is not limited to this, and the storage case 1 can not only reduce rattling caused by vibration and abnormal noise caused by the rattling, but also suppress the generation of shavings during assembly, and therefore can be applied to any case that houses an electrically functioning printed circuit board therein.

[0016] 1, 2 and 11(A), the storage case 1 is composed of a base 10 on which a substrate 30 is mounted, and a cover 20 attached to the base 10 so as to house the substrate 30 therein. The cover 20 is attached to the base 10 by engaging claws 25 with claw engagement parts 15 of the base 10. The bottom and side surfaces of the storage case 1 are provided with a connector 40 for electrically connecting the substrate 30 to the outside, a terminal block 41 for protecting the connector cable, and the like. The cut surface part 24 of the cover 20 and the abutting part 14 of the base 10 are provided at corresponding positions, and the two are in abutment with each other.

[0017] 3 to 5, the base 10 is configured to accommodate the substrate 30, and is composed of a base portion 11 that is rectangular in plan view, a wall portion 12 that rises upward from the base portion 11 so as to surround the periphery of the substrate 30, and an abutment portion 14 formed on the outside of the wall portion 12. An internal thread is appropriately provided on the upper surface of the base portion 11 (the surface that will be the inside of the storage case 1 when assembly is complete) for screwing the substrate 30. A claw portion engagement portion 15 is formed on the lower surface of the base portion 11 (the surface that will be the outside of the storage case 1 when assembly is complete) at a position corresponding to the claw portion 25 on the outer periphery, and a recess is also formed for attaching the connector 40.

[0018] The wall portion 12 rises from slightly inside the outer periphery of the base portion 11 to a height that will roughly surround the substrate 30 when the substrate 30 is attached, and is formed so that the outer side surface of the wall portion 12 fits inside the cover 20. The wall portion 12 is formed inward from the outer periphery of the base portion 11 by the thickness of the material of the cover 20 so that the side surfaces of the base 10 and the cover 20 are flush when the base 10 and the cover 20 are assembled.

[0019] The abutment portion 14 is formed on the outside of the wall portion 12 flush with the side surface of the base 10, lower than the height of the wall portion 12 and higher than the base portion 11 (non-abutment portion 14Z) where the abutment portion 14 is not formed, i.e., protrudes from the upper surface of the base portion 11 toward the cover 20. Note that, as described later, the abutment portion 14 may be lower than the base portion 11 (non-abutment portion 14Z) where the abutment portion 14 is not formed, i.e., may be formed recessed.

[0020] Furthermore, the abutment portion 14 is formed so that the side surface of the cover 20 and the side surface of the abutment portion 14 are flush with each other when the base 10 and the cover 20 are assembled. The abutment portion 14 is provided at one location on the front side surface having an area for connecting a connector to the side surface, and at two locations on each of the other side surfaces. The length of each abutment portion 14 in a plan view is determined appropriately. The upper surface of the abutment portion 14 abuts against a cut surface 24S of the cover 20, which will be described later, when assembled, and is preferably flat so as to abut against the cut surface 24S over a wide area.

[0021] The outer side surface of the wall portion 12 is provided with a sliding portion 13 against which the inner surface of the cover 20 slides when the cover 20 is attached. The sliding portion 13 is provided on the outer side surface of the wall portion 12 corresponding to a portion (non-contact portion 14Z) where the abutment portion 14 is not formed. For example, on the left side surface, right side surface, and rear side, the sliding portion 13 is provided in the approximate center of the wall portion 12, and two abutment portions 14 are provided on both sides of the sliding portion 13. That is, the sliding portion 13 and the abutment portion 14 are provided alternately. On the front side, there is only one abutment portion 14 due to space restrictions, but the sliding portion 13 is provided at a position corresponding to the non-abutment portion 14Z. The sliding portion 13 and the abutment portion 14 are provided at positions that do not overlap in the direction in which the cover 20 is attached to the base 10.

[0022] The sliding portion 13 may protrude outward from the outer side surface (non-sliding portion 13Z) of the wall portion 12 corresponding to the portion where the abutting portion 14 is formed (i.e., the wall portion 12 facing the cut surface portion 24). As shown in FIG. 5(F2), the thickness (L1) of the sliding portion 13 is formed thicker on the outer side than the thickness L2 (thickness L2 at the non-sliding portion 13Z) of the wall portion 12 where the sliding portion 13 is not formed. This has the effect of pushing the side portion 22 of the cover 20 outward when the cover 20 is attached to the base 10, as described later.

[0023] 6 to 8, the cover 20 has an upper surface portion 21 that is rectangular in plan view and forms the upper surface of the storage case 1, a side portion 22 that extends from the periphery of the upper surface portion 21 toward the base 10 and covers the periphery of the wall portion 12 of the base 10, and a claw portion 25 that extends further toward the base 10 from an end portion 26 of the side portion 22 and engages with the claw portion engagement portion 15 of the base 10. As shown in FIG. 7(B), the end portion 26 of the side portion 22 has a bent portion 23 and a cut surface portion 24 formed in addition to the claw portion 25. In this embodiment, the claw portion 25 is formed so as to extend from the bent portion 23, but is not limited to this and may be formed so as to extend from the cut surface portion 24.

[0024] 8(A) and (C), the bent portion 23 is bent outward with the curved R portion 23R facing inward, i.e., the wall portion 12. The cover 20 is formed by cutting a thin plate to a predetermined size and then pressing to form the side portion 22, but the end surface 23S formed during cutting is further bent outward by drawing or the like, so that it faces the outside direction rather than the direction of the base 10. The bent portion 23 is provided at a position corresponding to the sliding portion 13 of the base 10.

[0025] 8(B) and (D), the cut surface portion 24 is formed in a state where the cut surface 24S formed when the thin plate is cut faces the base 10 without being bent at the end portion 26 other than the bent portion 23. The cut surface portion 24 is provided at a position corresponding to the abutment portion 14 of the base 10. That is, the bent portion 23 and the cut surface portion 24 are provided alternately at the end portion 26.

[0026] Also, the length L3 from the upper surface 21 to the cut surface 24S in the cut surface portion 24 is formed shorter than the length L4 from the upper surface 21 to the tip of the bent portion 23 in the bent portion 23. This corresponds to the fact that the abutting portion 14 protrudes from the upper surface of the base portion 11 toward the cover 20 in this embodiment. In this way, by making the abutting portion 14 convex and making the length of the cut surface portion 24 shorter than the bent portion 23, the dimensional accuracy of the cut surface portion 24 can be easily ensured during the manufacturing process (when the cover 20 is pressed). Note that, when the abutting portion 14 is formed concavely on the upper surface of the base portion 11, the lengths of both are formed inversely. That is, the length L3 from the upper surface 21 to the cut surface 24S in the cut surface portion 24 may be formed longer than the length L4 from the upper surface 21 to the tip of the bent portion 23 in the bent portion 23.

[0027] The storage case 1 is assembled as shown in Figures 9 to 11. First, the connector 40 and the terminal block 41 are attached to the base 10 at predetermined locations. Next, the board 30 is fixed to the upper surface side of the base 10 with male screws and electrically connected to the connector 40. Next, the claws 25 of the cover 20 and the claw engagement parts 15 of the base 10 are aligned so as to correspond to each other (dotted arrows in Figure 11(A)), and the end 26 of the side part 22 of the cover 20 is fitted near the top of the wall part 12 of the base 10. In this case, the folded part 23 and the sliding part 13, and the cut surface part 24 and the abutting part 14 are aligned so as to correspond to each other.

[0028] When the cover 20 is pushed into the base 10 in this state, the bent portion 23 is longer than the cut surface portion 24, so it hits the outer side surface of the wall portion 12 before the cut surface portion 24 does, but since the bent portion 23 has the R portion 23R on the wall portion 12 side, it does not scratch the wall portion 12, and as a result, the generation of shavings can be suppressed. In addition, the bent portion 23 hits and is guided before the cut surface portion 24, so it is pushed outward slightly. In particular, the bent portion 23 is pushed outward more greatly because the sliding portion 13 protrudes in the outward direction of the wall portion 12 more than the non-sliding portion 13Z. This pressing effect is exerted not only when the bent portion 23 slides on the sliding portion 13 during the process of gradually pushing in the cover 20 to attach it, but also when the inner surface of the side portion 22 at a position corresponding to the bent portion 23 slides on the sliding portion 13.

[0029] In this way, when the inner surface of the bent portion 23 or the side portion 22 between the bent portion 23 and the upper surface portion 21 slides on the sliding portion 13 and the side portion 22 is pressed outward, the side portion 22 between the cut surface portion 24 and the upper surface portion 21 also elastically deforms outward, thereby increasing the clearance between the cut surface portion 24 and the outer side surface of the wall portion 12. Since the cut surface portion 24 does not have the R portion 23R like the bent portion 23, it is preferable to avoid contact with the side portion 22 (non-sliding portion 13Z). Since the sliding portion 13 protrudes outward from the outer side surface (non-sliding portion 13Z) of the wall portion 12 that the cut surface portion 24 faces, contact between the wall portion 12 and the cut surface portion 24 can be more reliably avoided, and thus the generation of shavings during assembly can be suppressed.

[0030] The cover 20 is pushed into the base 10 while sliding the inner surface of the bent portion 23 or the side portion 22 on the sliding portion 13, and when the cut surface 24S of the cut surface portion 24 abuts against the abutment portion 14, the pushing is stopped and the claw portion 25 is engaged with the base 10. In this manner, in the storage case 1, the abutment portion 14 and the cut surface 24S abut. Since the cut surface 24S is formed (sheared) when the thin plate is cut, it has a high dimensional accuracy in the cover mounting direction compared to the tip of the bent portion 23 formed by drawing or the like. Therefore, by providing the cut surface portion 24 with a high dimensional accuracy in the mounting direction of the cover 20 and abutting the cut surface 24S against the abutment portion 14 of the base 10, rattling and abnormal noise caused thereby can be reduced.

[0031] The tip of the bent portion 23 and the non-contact portion 14Z provided at a position corresponding to the bent portion 23 may or may not be in contact as long as the cut surface 24S and the abutment portion 14 are in contact; however, considering that the dimensional accuracy of the tip of the bent portion 23 is not as high as that of the cut surface portion 24, it is preferable that they are not in contact.

[0032] As described above, the end 26 of the cover 20 is provided with a bent portion 23 that is bent with an outward curvature and a cut surface portion 24 that has high dimensional accuracy in the direction in which the cover 20 is attached, and the cut surface 24S abuts against the abutment portion 14 of the base 10, thereby providing a storage case 1 that reduces rattling and resulting abnormal noise, and suppresses the generation of shavings during assembly.

[0033] Also provided is an assembly method for the base 10 and cover 20 having the above-mentioned configuration, in which the folded portion 23 and the sliding portion 13 and the cut surface portion 24 and the abutment portion 14 are aligned so as to correspond to each other, the folded portion 23 or the inner surface of the side portion 22 is slid against the sliding portion 13 while the cover 20 is pushed into the base 10, and when the cut surface 24S abuts against the abutment portion 14, the pushing is stopped and the claw portion 25 is engaged with the base 10.

[0034] According to this, a method of assembling a storage case 1 is provided which uses a cover 20 having a folded portion 23 bent at an end 26 with an outward curvature and a cut surface portion 24 with high dimensional accuracy in the direction in which the cover 20 is attached, and a base 10 having a sliding portion 13 on the outer side surface of a wall portion 12 along which the folded portion 23 etc. slide and an abutment portion 14 on the outside of the wall portion 12 for abutting against the cut surface 24S, by aligning the folded portion 23 and the sliding portion 13 and the cut surface portion 24 and the abutment portion 14 so that they correspond to each other, and pushing the folded portion 23 etc. against the sliding portion 13 until the cut surface 24S abuts against the abutment portion 14, thereby reducing rattling and resulting abnormal noise, and suppressing the generation of shavings during assembly.

[0035] Also, a method for assembling a storage case 1 including a base 10 on which a substrate 30 is mounted and a cover 20 attached to the base 10 so as to house the substrate 30 therein, the method comprising forming a bent portion 23 bent outwardly with a curvature at an end 26 of a side portion 22 that covers the periphery of the base 10 in the cover 20, a cut surface portion 24 having a cut surface 24S facing the base 10 at the end 26 other than the bent portion 23, and a claw portion 25 extending from the end 26 to engage with the base 10, The method includes forming a wall portion 12 that fits into the base 10, a sliding portion 13 on the outer side surface of the wall portion 12 against which the bent portion 23 slides when the cover 20 is attached, and an abutment portion 14 on the outside of the wall portion 12 that abuts against the cut surface 24S, aligning the bent portion 23 with the sliding portion 13 and the cut surface portion 24 with the abutment portion 14 so that they correspond to each other, pushing the cover 20 into the base 10 while sliding the inner surface of the bent portion 23 or the side portion 22 against the sliding portion 13, and stopping the pushing when the cut surface 24S abuts against the abutment portion 14 and engaging the claw portion 25 with the base 10. This provides a method for assembling a storage case 1 that reduces rattling and the resulting abnormal noise, and suppresses the generation of chips during assembly.

[0036] The present invention is not limited to the illustrated examples, and may be implemented in any configuration that does not deviate from the scope of the claims. That is, the present invention has been particularly illustrated and described mainly with respect to specific embodiments, but those skilled in the art may make various modifications to the above-described embodiments in terms of the number and other details of the configuration without departing from the scope of the technical idea and purpose of the present invention. [Explanation of symbols]

[0037] 1 Storage Case 10 Base 11 Base 12 Wall 13 Sliding part 14 Contact part 14Z Non-contact part 15 Claw engaging part 20 Cover 21 Top part 22 Side 23 Bending section 23R R Division 23S end face 24 Cut section 24S cutting surface 25 Claw 26 End 30 Substrate 40 Connectors 41 Terminal block

Claims

1. A storage case including a base on which a substrate is mounted and a cover attached to the base so as to house the substrate therein, The cover is An upper surface portion; A side portion extending from the top surface portion and surrounding the base; a bent portion formed at an end of the side portion and bent with an outward curvature; a cut surface portion formed at the end portion other than the bent portion and having a cut surface facing the base; a claw portion extending from the end portion and engaging with the base; having The base is The base and a wall portion rising from the base portion and fitting inside the side portion; a sliding portion formed on an outer side surface of the wall portion, against which the bent portion or the inner surface of the side portion slides when the cover is attached; a contact portion formed on the outer side of the wall portion and contacting the cut surface; having The claw portion engages with the base, The abutment portion abuts against the cut surface. Storage case.

2. The abutment portion protrudes from the base portion toward the cover on an outer side of the wall portion, 2. The storage case according to claim 1, wherein a length from the upper surface to the cut surface at the cut surface portion is shorter than a length from the upper surface to a tip of the bent portion at the bent portion.

3. 3. The storage case according to claim 1, wherein the sliding portion protrudes outward from the outer side surface of the wall portion that faces the cut surface portion.

4. A method for assembling a storage case including a base on which a substrate is mounted and a cover attached to the base so as to house the substrate therein, comprising the steps of: The cover is provided with a bent portion at an end of a side portion that covers the periphery of the base and is bent outward with a curvature, a cut surface portion at the end other than the bent portion and having a cut surface facing the base, and a claw portion extending from the end to engage with the base, The base is provided with a wall portion that rises from a base portion and fits inside the side portion, a sliding portion on an outer side surface of the wall portion against which the bent portion slides when the cover is attached, and an abutment portion on an outer side of the wall portion that abuts against the cut surface, The bending portion and the sliding portion, and the cutting surface portion and the abutting portion are aligned so as to correspond to each other; The cover is pushed onto the base while sliding the inner surface of the bent portion or the side portion against the sliding portion; When the cut surface comes into contact with the contact portion, the pushing is stopped. Engaging the claw portion with the base; Assembly method.

5. A method for assembling a storage case including a base on which a substrate is mounted and a cover attached to the base so as to house the substrate therein, comprising the steps of: The cover is An upper surface portion; A side portion extending from the top surface portion and surrounding the base; a bent portion formed at an end of the side portion and bent with an outward curvature; a cut surface portion formed at the end portion other than the bent portion and having a cut surface facing the base; a claw portion extending from the end portion and engaging with the base; having The base is The base and a wall portion rising from the base portion and fitting inside the side portion; a sliding portion formed on an outer side surface of the wall portion, against which the bent portion or the inner surface of the side portion slides when the cover is attached; a contact portion formed on the outer side of the wall portion and contacting the cut surface; having The bending portion and the sliding portion, and the cutting surface portion and the abutting portion are aligned so as to correspond to each other; The cover is pushed onto the base while sliding the inner surface of the bent portion or the side portion against the sliding portion; When the cut surface comes into contact with the contact portion, the pushing is stopped. Engaging the claw portion with the base; Assembly method.

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