JP7628901B2 - Storage case and assembly method - Google Patents

Description

The present invention relates to a storage case and a method for assembling the storage case.

Conventionally, there are known assembly methods for reducing rattling caused by vibration and the resulting abnormal noises in storage cases that are mounted on moving objects such as vehicles and house printed circuit boards and the like, and for suppressing the generation of shavings when assembling the storage cases.

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 underside and is attached to the base so as to cover the upper 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 underside 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, which elastically deforms the circumferential wall of the cover inward to avoid contact between the open-side edge of the cover and the anti-rattle protrusion, 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 protrusion come into contact when positioning is completed. Finally, once the cover has been positioned, the crimping protrusion is bent toward the underside of the base plate to perform the crimping process.

JP 2005-340700 A

Since the chips generated during assembly can adversely affect the quality of the printed circuit boards and other items stored in the case, it is important to prevent the generation of chips in the case. In the conventional technology described above, in order to prevent the generation of chips, the cover peripheral wall is elastically deformed inward by the rattle prevention protrusions, and the generation of chips is avoided by preventing the rattle prevention protrusions and the cover peripheral wall from rubbing against each other during assembly.

There are other ways to avoid chipping. 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 creating chips. In a storage case with 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.; hereafter referred to as squeezing, etc.), and if the dimensional accuracy of the bent part in the direction of attaching and detaching the cover is not high, there will be a part between the bent part and the stopper part that cannot abut, resulting in a gap and a problem of rattling.

The present invention was devised in light of these circumstances, and provides a storage case and a method for assembling the storage case that reduces rattling and the resulting abnormal noises in a storage case that houses a printed circuit board or the like, and that suppresses the generation of shavings when assembling the storage case.

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.

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.

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.

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.

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.

As described above, the present invention provides a storage case and a method for assembling the storage case that reduces rattling and the resulting abnormal noises in a storage case that contains a printed circuit board or the like, and that suppresses the generation of shavings when assembling the storage case.

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 according to a first embodiment of the present invention. 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. 1A is a plan view, FIG. 1B is a front view, FIG. 1C is a rear view, FIG. 1D is a bottom view, FIG. 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. 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. 1A is a plan view, FIG. 1B is a front view, FIG. 1C is a rear view, FIG. 1D is a bottom view, FIG. 1A is a perspective view from above, and FIG. 1B is a perspective view from below of a cover according to a first embodiment of the present invention. 7A is a cross-sectional view of a cover of a first embodiment of the present invention taken along line G-G in FIG. 6 (a cross-sectional view including a bent portion), (B) is a cross-sectional view of line I-I in FIG. 6 (a cross-sectional view including a cut surface portion), (C) is an enlarged view of portion H, and (D) is an enlarged view of portion J. FIG. 2 is an exploded view of the storage case according to the first embodiment of the present invention, as viewed from above. FIG. 2 is an exploded view of the storage case according to the first embodiment of the present invention, as viewed from below. 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.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First embodiment>
1 to 11, a 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 substrate 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 storage case 1 is not limited thereto, and since it not only reduces rattling caused by vibration and abnormal noise caused by the rattling, but also suppresses the generation of shavings during assembly, it can be applied to any case that houses an electrically functioning printed circuit board therein.

As shown in Figs. 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 inside. The cover 20 is attached to the base 10 by engaging the claws 25 with the claw engagement parts 15 of the base 10. The bottom and sides 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 abutment part 14 of the base 10 are provided at corresponding positions, and the two are in abutment with each other.

As shown in Figs. 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 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.

The wall portion 12 rises from a position 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 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 so that the sides of the base 10 and the cover 20 are flush when the two are assembled, that is, by the thickness of the material of the cover 20.

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 below, 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.

The abutment portion 14 is formed so that the side of the cover 20 and the side of the abutment portion 14 are flush with each other when the base 10 and the cover 20 are assembled. One abutment portion 14 is provided on the front side having an area for connecting a connector to the side, and two on each of the other sides. 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 it is preferable that the upper surface be flat so that it abuts against the cut surface 24S over a wide area.

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 the 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. In other words, 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.

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 abutment 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 below.

6 to 8, the cover 20 has a rectangular top surface 21 in plan view that constitutes the top surface of the storage case 1, side portions 22 that extend from the periphery of the top surface 21 toward the base 10 and cover the periphery of the wall portion 12 of the base 10, and claw portions 25 that extend further toward the base 10 from the end portion 26 of the side portion 22 and engage 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 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 this is not limited thereto, and may be formed so as to extend from the cut surface portion 24.

As shown in Figures 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 specified 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 outward rather than toward the base 10. The bent portion 23 is provided at a position corresponding to the sliding portion 13 of the base 10.

As shown in Figures 8 (B) and (D), the cut surface portion 24 is not bent at the end portion 26 other than the bent portion 23, and is formed in a state in which the cut surface 24S formed when the thin plate is cut faces the base 10. The cut surface portion 24 is provided at a position corresponding to the abutment portion 14 of the base 10. In other words, the bent portion 23 and the cut surface portion 24 are provided alternately at the end portion 26.

In addition, 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, if the abutting portion 14 is formed concave on the upper surface of the base portion 11, the lengths of the two are formed inversely. In other words, 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.

The storage case 1 is assembled as shown in Figures 9 to 11. First, the connector 40 and terminal block 41 are attached to the base 10 in a predetermined location. Next, the board 30 is fixed to the top 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 that they 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 abutment part 14 are aligned so that they correspond to each other.

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 the position corresponding to the bent portion 23 slides on the sliding portion 13.

In this way, when the inner surface of the folded portion 23 or the side portion 22 between the folded 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 an R portion 23R like the folded portion 23, it is preferable to avoid contact with the side portion 22 (non-sliding portion 13Z). By having the sliding portion 13 protrude 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, thereby suppressing the generation of shavings during assembly.

The cover 20 is pushed 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 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 way, 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 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 a cut surface portion 24 with 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 by it can be reduced.

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 contact portion 14 are in contact, but 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.

As described above, the end 26 of the cover 20 is provided with a bent portion 23 that is bent outward with a curvature, and a cut surface portion 24 that has high dimensional accuracy in the direction in which the cover 20 is attached. The cut surface 24S comes into contact with the abutment portion 14 of the base 10, thereby reducing rattling and the resulting abnormal noise, and providing a storage case 1 that suppresses the generation of chips during assembly.

In addition, an assembly method is provided in which the base 10 and cover 20 having the above-mentioned configuration are aligned so that the bent portion 23 corresponds to the sliding portion 13 and the cut surface portion 24 corresponds to the abutting portion 14, the cover 20 is pushed 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 when the cut surface 24S abuts against the abutting portion 14, the pushing is stopped and the claw portion 25 is engaged with the base 10.

This provides a method of assembling a storage case 1 that uses a cover 20 having a bent 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 the wall portion 12 against which the bent portion 23 and the like slide, and an abutting portion 14 on the outside of the wall portion 12 against which the cut surface 24S abuts. The bent portion 23 and the sliding portion 13, and the cut surface portion 24 and the abutting portion 14 are aligned so that they correspond to each other, and the bent portion 23 and the like are slid along the sliding portion 13 while being pushed in until the cut surface 24S abuts against the abutting portion 14, thereby reducing rattling and the resulting abnormal noise, and suppressing the generation of chips during assembly.

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, in which a bent portion 23 is formed at an end 26 of a side portion 22 that covers the periphery of the base 10, the end 26 other than the bent portion 23 is bent outward with a curvature, a cut surface portion 24 having a cut surface 24S facing the base 10, and a claw portion 25 extending from the end 26 that engages with the base 10, and in the base 10, a claw portion 25 is formed on the inside of the side portion 22 that rises from the base 11 and engages 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 against which the cut surface 24S abuts, 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, 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.

The present invention is not limited to the illustrated examples, but may be implemented in configurations that do not deviate from the contents of the claims. In other words, the present invention has been particularly illustrated and described primarily with respect to specific embodiments, but those skilled in the art may make various modifications to the above-described embodiments in terms of quantity and other detailed configurations without departing from the scope of the technical idea and purpose of the present invention.

REFERENCE SIGNS LIST 1 storage case 10 base 11 base portion 12 wall portion 13 sliding portion 14 abutment portion 14Z non-abutment portion 15 claw portion engagement portion 20 cover 21 upper surface portion 22 side portion 23 bent portion 23R R portion 23S end surface 24 cut surface portion 24S cut surface 25 claw portion 26 end portion 30 substrate 40 connector 41 terminal block

Claims (5)

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 that rises from the base portion and fits 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. 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. The storage case according to claim 1 or 2, characterized in that the sliding portion protrudes outward from the outer side surface of the wall portion that the cutting surface portion faces. 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;
How to assemble: 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;
How to assemble: