JP2023003189A - Housing case and assembling method - Google Patents

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

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

Conventionally, in a storage case that is mounted on a mobile object such as a vehicle and houses printed circuit boards, etc., it is possible to reduce rattling caused by vibration and noise caused by vibration, and to suppress the generation of shavings when assembling the storage case. Assembly methods and the like for this are known.

For example, Patent Literature 1 discloses a method for assembling a storage case including a base having a substrate portion 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 portion. In this assembling method, at a plurality of places on the peripheral edge of the base plate, there are provided rattle-preventing projections that come into contact with the opening-side edge of the cover positioned at the mounting position with respect to the base from the outside. The peripheral wall of the cover is elastically deformed inward by pressing the edge on the opening side, and an inclined surface is formed on which a reaction force is applied in a direction in which the cover separates from the base portion. Next, on the edge of the cover on the opening side, there is formed a protrusion for crimping that is bent toward the lower surface of the base plate and holds the cover in the mounting position against the reaction force. Further, by pressing the outer surface of the edge of the opening side of the cover from the outside, the peripheral wall of the cover is elastically deformed inward to avoid contact between the edge of the cover on the opening side and the projections for preventing backlash while the cover is moved to the mounting position with respect to the base. , and positioning is performed so that the opening-side edge and the rattling-preventing projection are in contact with each other when the positioning is completed. Finally, crimping is performed by bending the projection for crimping of the cover positioned by positioning toward the lower surface side of the base plate.

Japanese Patent Application Laid-Open No. 2005-340700

Since shavings generated during assembly may adversely affect the quality of printed circuit boards and the like to be stored, it is important to avoid the generation of shavings in the storage case. In the above-described prior art, in order to avoid the generation of shavings, the cover peripheral wall is elastically deformed inward by the play-preventing projections to avoid rubbing between the play-preventing projections and the cover peripheral wall during assembly. This avoids the generation of shavings.

This is not the only way to avoid shavings, for example, by forming a bent fold with a slight outward curvature at the edge of the periphery of the cover that rubs against the base, so that the squarish edges of the cover rub against the base. Structures are also known that avoid the formation of shavings by shaving the sides. In a storage case with this structure, when the cover is assembled (attached) by pushing it into the base, the tip of the bent portion of the cover stops when it abuts against the stopper portion of the base, and in that state, the claw portion of the cover is bent and crimped. , both are assembled. However, with this method, the bent portion is often formed by press working other than shearing (for example, squeezing, bending, etc.; hereinafter referred to as squeezing, etc.). If the dimensional accuracy is not high, there is a portion that cannot be abutted between the bent portion and the stopper portion.

SUMMARY OF THE INVENTION The present invention has been devised in view of such circumstances. A restraining storage case and a method for assembling the storage case are provided.

In order to solve the above-described problems, a storage case includes a base on which a board is mounted and a cover attached to the base so as to house the board inside, wherein the cover extends from a top surface and from the top surface. a side portion covering the periphery of the base, a bent portion formed at the end of the side portion and bent with an outward curvature, and an end portion other than the bent portion with the cut surface facing the base and a claw extending from the end and engaging the base, the base having a base and walls upstanding from the base and fitting inside the sides; It has a sliding portion that is formed on the outer side surface of the wall portion and slides on the inner surface of the bent portion or the side portion when the cover is attached, and a contact portion that is formed on the outside of the wall portion and contacts the cut surface. A storage case is provided, wherein the pawl engages the base and the abutment abuts the cutting surface.
According to this, a bent portion that is bent outward with a curvature and a cut surface portion with high dimensional accuracy in the cover mounting direction are provided at the end portion of the cover, and the cut surface and the base come into contact with each other, thereby preventing rattling and the like. Provided is a storage case that reduces abnormal noise and the like and suppresses the generation of shavings during assembly.

Furthermore, the abutting portion protrudes from the base portion toward the cover outside the wall portion, and the length from the upper surface portion to the cut surface of the cut surface portion is shorter than the length from the upper surface portion of the bent portion to the tip of the bent portion. may be characterized.
According to this, by forming the abutting portion in a convex shape and making the length of the cut surface portion shorter than that of the bent portion, it is possible to easily secure the dimensional accuracy of the cut surface portion in the manufacturing process (during pressing of the cover). At the same time, when the cover is put on the base, the bent portion hits and is guided by the base earlier than the cut surface portion, so that the cut surface portion is less likely to generate shavings.

Further, the sliding portion may be characterized in that the cut surface portion protrudes in the outer direction of the wall portion beyond the outer side surface of the wall portion facing the sliding portion.
According to this, since the cut surface portion protrudes in the outer direction of the wall portion from the outer side surface of the opposing wall portion, the bent portion and the inner surface of the side portion are pressed against the sliding portion when sliding on the sliding portion. The elastic deformation increases the clearance between the cut surface portion and the outer side surface of the wall portion, thereby more reliably avoiding contact with the cut surface portion.

In order to solve the above-described problems, there is provided a method for assembling a storage case comprising a base on which a substrate is mounted and a cover attached to the base so as to house the substrate inside, wherein the cover covers the periphery of the base. A bent portion that is bent outward with a curvature at the end of the portion, a cut surface portion facing the base at the end other than the bent portion, and a claw portion that engages with the base extending from the end In the base, a wall part that rises from the base part and fits inside the side part, a sliding part in which the bent part slides on the outer side surface of the wall part when the cover is attached, and the wall part A contact portion that contacts the cut surface is formed on the outside, and the bent portion and the sliding portion and the cut surface portion and the contact portion are aligned so that they correspond to each other, and the inner surface of the bent portion or the side portion is attached to the sliding portion. An assembly method is provided in which the cover is pushed into the base while being slid, the pushing is stopped when the cut surface comes into contact with the contact portion, and the claw portion is engaged with the base.
According to this, the bent portion bent outward with a curvature and the cut surface portion having high dimensional accuracy in the cover mounting direction are formed at the end portion of the cover, and the bent portion contacts the sliding portion and the cut surface portion. By aligning the parts so that the parts correspond to each other, sliding the bent part etc. on the sliding part and pushing it until the cut surface contacts the contact part, it reduces rattling and noise caused by it, and when assembling Provided is a method for assembling a storage case that suppresses the generation of shavings.

In order to solve the above problems, there is provided a method for assembling a storage case comprising a base on which a substrate is mounted and a cover attached to the base so as to house the substrate inside, wherein the cover has a top surface and a top surface. a side portion extending from and covering the perimeter of the base; a bent portion formed at the end of the side portion and bent with an outward curvature; The base has a facing cut surface portion and a claw portion extending from the end portion and engaging the base portion, the base portion having a base portion and a wall rising from the base portion and fitting inside the side portion. a sliding portion that is formed on the outer side surface of the wall portion and slides on the inner surface of the bent portion or the side portion when the cover is attached; a contact portion that is formed on the outside of the wall portion and contacts the cut surface; Align the bent portion with the sliding portion and the cut surface portion with the abutment portion so that they correspond to each other, and push the cover into the base while sliding the inner surface of the bent portion or the side portion against the sliding portion, and cut the cut surface An assembly method is provided in which the pushing is stopped when the tab abuts the abutment and the pawl engages the base.
According to this, the cover is provided with a bent portion bent outward with a curvature at the end portion and a cut surface portion with high dimensional accuracy in the cover mounting direction, and the bent portion and the like slide on the outer side surface of the wall portion. Using a base provided with a sliding portion and a contact portion that contacts the cut surface on the outside of the wall portion, the bent portion and the sliding portion and the cut surface portion and the contact portion are aligned so that they correspond, and the bent portion While sliding the etc. on the sliding part, push it until the cut surface contacts the contact part, thereby reducing rattling and noise caused by it, and suppressing the generation of shavings when assembling the storage case Assembly of the storage case A method is provided.

INDUSTRIAL APPLICABILITY As described above, according to the present invention, in a storage case that houses a printed circuit board or the like, rattling and noise caused by the rattling can be reduced, and the generation of scraps during assembly of the storage case can be suppressed. and a method for assembling the storage case.

(A) Plan view, (B) Front view, (C) Rear view, (D) Bottom view, (E) Right side view, (F) Left side view of the storage case of the first embodiment according to the present invention . The perspective view from (A) upper part of the storage case of 1st Example which concerns on this invention, (B) The perspective view from the lower part. (A) Plan view, (B) front view, (C) rear view, (D) bottom view, (E) right side view, (F) left side view of the base of the first embodiment according to the present invention. (A) Perspective view from above, (B) Perspective view from below of the base of the first embodiment according to the present invention. (A) an enlarged view of part A, (B) an enlarged view of part B, (C) an enlarged view of part C, and (D) an enlarged view of part D in FIG. 3 of the base of the first embodiment according to the present invention. In the figure, (E) enlarged view of part E, (F1) enlarged view of part F, and (F2) part F, lines indicating the outer shape of the contact part and the base are drawn so that the difference in thickness of the sliding part can be easily understood. Erased enlarged view. (A) 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 the cover of the first embodiment of the present invention. (A) Perspective view from above, (B) Perspective view from below of the cover of the first embodiment according to the present invention. (A) Cross-sectional view taken along the GG cross section (cross section including the bent portion) in FIG. 6, (B) the II cross section (cross section including the cut surface portion) in FIG. 6 of the cover of the first embodiment according to the present invention. , (C) an enlarged view of portion H, and (D) an enlarged view of portion J. FIG. 1 is an exploded assembly view of a storage case according to a first embodiment of the present invention, viewed from above; FIG. 1 is an exploded view of a storage case according to a first embodiment of the present invention, viewed from below; FIG. (A) An exploded assembly view from above when aligning the storage case of the first embodiment according to the present invention so that the bent portion and the sliding portion and the cut surface portion and the contact portion correspond to each other, (B) ) exploded view from below.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
<First embodiment>
A storage case 1 according to the present embodiment will be described with reference to FIGS. 1 to 11. FIG. The storage case 1 is mounted on a moving object such as a vehicle, and is a case for housing a substrate 30 and the like therein. Unit). However, the storage case 1 is not limited to this, and the storage case 1 not only reduces rattling due to vibration and abnormal noise caused by vibration, but also suppresses the generation of shavings during assembly. It can be applied to any case containing a printed circuit board that functions as a

As shown in FIGS. 1, 2 and 11A, the storage case 1 comprises 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. be. The cover 20 is attached to the base 10 by engaging the claws 25 with the claw engaging portions 15 of the base 10 . A connector 40 for electrically connecting the substrate 30 to the outside, a terminal block 41 for protecting the connector cable, and the like are provided on the bottom and side surfaces of the housing case 1 . The cut surface portion 24 of the cover 20 and the contact portion 14 of the base 10 are provided at corresponding positions and are in contact with each other.

As shown in FIGS. 3 to 5, the base 10 is configured to receive the substrate 30. The base 11 is rectangular in plan view, and the wall rises upward from the base 11 so as to surround the substrate 30. As shown in FIGS. It is composed of a portion 12 and a contact portion 14 formed outside the wall portion 12 . A female screw for screwing the substrate 30 is appropriately provided on the upper surface of the base portion 11 (the surface inside the storage case 1 when the assembly is completed). On the lower surface of the base portion 11 (the surface that will be the outside of the storage case 1 when the assembly is completed), claw portion engaging portions 15 are formed at positions corresponding to the claw portions 25 on the outer peripheral portion. A recess is formed.

The wall portion 12 rises from slightly inside the outer periphery of the base portion 11 to a height that roughly surrounds the substrate 30 when the substrate 30 is attached, and the outer side surface of the wall portion 12 fits inside the cover 20 . formed to fit. The wall portion 12 is formed so that the side surfaces of the base 10 and the cover 20 are flush with each other when the base 10 and the cover 20 are assembled. .

The contact portion 14 is flush with the side surface of the base 10 outside the wall portion 12 and is lower than the height of the wall portion 12 and higher than the base portion 11 (non-contact portion 14Z) where the contact portion 14 is not formed. It is formed in height, that is, it protrudes from the upper surface of the base portion 11 toward the cover 20 . As will be described later, the contact portion 14 may be lower than the base portion 11 (the non-contact portion 14Z) where the contact portion 14 is not formed, that is, may be recessed.

Further, the contact portion 14 is formed so that the side surface of the cover 20 and the side surface of the contact portion 14 are flush with each other when the base 10 and the cover 20 are assembled. One contact portion 14 is provided on the side surface of the front side having an area for connecting a connector on the side surface, and two contact portions 14 are provided on each of the other side surfaces. The length of one contact portion 14 in plan view is appropriately determined. The upper surface of the contact portion 14 contacts a cut surface 24S of the cover 20, which will be described later, when assembled, and is preferably flat so as to contact the cut surface 24S over a wide range.

A sliding portion 13 on which the inner surface of the cover 20 slides when the cover 20 is attached is provided on the outer side surface of the wall portion 12 . 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 contact portion 14 is not formed. For example, on the left side, the right side, and the rear side, a sliding portion 13 is provided approximately in the center of the wall portion 12, and two abutting portions 14 are provided on both sides of the sliding portion 13. As shown in FIG. That is, the sliding portions 13 and the contact portions 14 are provided alternately. Although there is only one contact portion 14 on the front side due to space limitations, the sliding portion 13 is provided at a position corresponding to the non-contact portion 14Z. The sliding portion 13 and the contact portion 14 are provided at positions that do not overlap in the direction in which the cover 20 is attached to the base 10 .

In addition, the sliding portion 13 is located closer to the wall portion 12 than the outer side surface (non-sliding portion 13Z) of the wall portion 12 corresponding to the portion where the contact portion 14 is formed (that is, the wall portion 12 facing the cut surface portion 24). 12 may protrude in the outward direction. As shown in FIG. 5(F2), the thickness (L1) of the sliding portion 13 is equal to the thickness L2 of the wall portion 12 where the sliding portion 13 is not formed (the thickness L2 in the non-sliding portion 13Z). It is formed thicker on the outer side. As will be described later, this has the effect of expanding the side portions 22 of the cover 20 outward when the cover 20 is attached to the base 10 .

As shown in FIGS. 6 to 8, the cover 20 has a rectangular upper surface portion 21 forming the upper surface of the storage case 1 and a wall portion of the base 10 extending from the periphery of the upper surface portion 21 toward the base 10 . It has a side portion 22 for covering the periphery of the base 12 and a claw portion 25 extending further from the end portion 26 of the side portion 22 toward the base 10 and engaged with the claw portion engaging portion 15 of the base 10 . As shown in FIG. 7B, the end portion 26 of the side portion 22 is formed with a bent portion 23 and a cut surface portion 24 in addition to the claw portion 25 . Although the claw portion 25 is formed to extend from the bent portion 23 in this embodiment, the claw portion 25 is not limited to this and may be formed to extend from the cut surface portion 24 .

As shown in FIGS. 8A and 8C, the bent portion 23 is provided with an R portion 23R having a curvature so as to face the wall portion 12, and is bent outward. In the cover 20, the side portion 22 is formed by pressing after cutting a thin plate to a predetermined size. facing outwards. The bent portion 23 is provided at a position corresponding to the sliding portion 13 of the base 10 .

As shown in FIGS. 8B and 8D, the cut surface portion 24 is not bent at an end portion 26 other than the bent portion 23, and the cut surface 24S formed when cutting the thin plate faces the direction of the base 10. is formed by The cut surface portion 24 is provided at a position corresponding to the contact 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 .

Also, the length L3 from the upper surface portion 21 to the cut surface 24S in the cut surface portion 24 is formed shorter than the length L4 from the upper surface portion 21 to the tip of the bent portion 23 in the bent portion 23 . This corresponds to the contact portion 14 protruding from the upper surface of the base portion 11 toward the cover 20 in this embodiment. In this way, by forming the contact portion 14 in a convex shape and making the length of the cut surface portion 24 shorter than that of the bent portion 23, the dimensional accuracy of the cut surface portion 24 can be easily secured in the manufacturing process (during pressing of the cover 20). can be manufactured by In addition, when the contact portion 14 is formed to be recessed on the upper surface of the base portion 11, the lengths of both are reversed. That is, the length L3 from the upper surface portion 21 to the cut surface 24S in the cut surface portion 24 may be longer than the length L4 from the upper surface portion 21 to the tip of the bent portion 23 in the bent portion 23 .

The storage case 1 is assembled as shown in FIGS. 9-11. First, the connector 40 and the terminal block 41 are attached to the base 10 at predetermined locations. Next, the substrate 30 is fixed to the upper surface of the base 10 with male screws and electrically connected to the connector 40 . Next, the claw portion 25 of the cover 20 and the claw portion engaging portion 15 of the base 10 are aligned so as to correspond (dotted arrow in FIG. 11A), and the end portion 26 of the side portion 22 of the cover 20 is attached to the base. It fits near the top of wall 12 of 10 . In this case, the bent portion 23 and the sliding portion 13 and the cut surface portion 24 and the contact portion 14 are aligned so as to correspond to each other.

When the cover 20 is pushed into the base 10 in this state, since the bent portion 23 is longer than the cut surface portion 24 , it hits the outer side surface of the wall portion 12 before the cut surface portion 24 . Since the R portion 23R is provided on the side, the wall portion 12 is not damaged, and as a result, the generation of shavings can be suppressed. In addition, since the bent portion 23 hits and is guided earlier than the cut surface portion 24, the bent portion 23 is slightly pushed outward. In particular, since the sliding portion 13 protrudes in the outer direction of the wall portion 12 more than the non-sliding portion 13Z, the bent portion 23 is further pushed outward. This pressing effect is obtained not only when the bent portion 23 slides on the sliding portion 13, but also when the inner surface of the side portion 22 at the position corresponding to the bent portion 23 slides in the process of gradually pushing the cover 20 in order to attach it. It also plays when the part 13 is slid.

In this way, when the bent portion 23 or the inner surface of the side portion 22 between the bent portion 23 and the top portion 21 slides on the sliding portion 13 and the side portion 22 is pushed outward, the cut surface portion 24 and the top portion 21 slide. The middle side portion 22 of 21 is also elastically deformed 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 bent portion 23, it is preferable to avoid contact with the side portion 22 (non-sliding portion 13Z). The contact between the wall portion 12 and the cut surface portion 24 is more reliably avoided by the sliding portion 13 protruding outward from the outer side surface (non-sliding portion 13Z) of the wall portion 12 facing the cut surface portion 24. Therefore, it is possible to suppress 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 comes into contact with the contact portion 14, the pushing is stopped. The claw portion 25 is engaged with the base 10 . Thus, in the storage case 1, the contact portion 14 and the cut surface 24S are in contact. Since the cut surface 24S is formed (sheared) at the time of cutting the thin plate, the dimensional accuracy in the cover mounting direction is higher than that of the tip of the bent portion 23 formed by squeezing or the like. Therefore, by providing the cut surface portion 24 with high dimensional accuracy in the mounting direction of the cover 20 and by bringing the cut surface 24S into contact with the contact portion 14 of the base 10, rattling and 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 with each other as long as the cut surface 24S and the contact portion 14 are in contact with each other. Although they do not have to be in contact with each other, 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 with each other.

As described above, the end portion 26 of the cover 20 is provided with the bent portion 23 that is bent outward with a curvature and the cut surface portion 24 with high dimensional accuracy in the mounting direction of the cover 20, and the cut surface 24S and the base 10 are in contact with each other. It is possible to provide the storage case 1 that reduces rattling and noise caused by the contact portion 14 and suppresses the generation of chips during assembly.

Further, in the base 10 and the cover 20 having the above-described configurations, the bent portion 23 and the sliding portion 13 and the cut surface portion 24 and the contact portion 14 are aligned so as to correspond to each other, and the inner surface of the bent portion 23 or the side portion 22 is aligned. is pushed into the base 10 while sliding the cover 20 on the sliding portion 13, and when the cut surface 24S comes into contact with the contact portion 14, the pushing is stopped and the claw portion 25 is engaged with the base 10. be done.

According to this, the cover 20 is provided with a bent portion 23 bent outward with a curvature at the end portion 26 and a cut surface portion 24 with high dimensional accuracy in the mounting direction of the cover 20, and the outer side surface of the wall portion 12. The base 10 is provided with a sliding portion 13 on which the bent portion 23 slides, and a contact portion 14 on the outside of the wall portion 12 that contacts the cut surface 24S. 24 and the contact portion 14 are aligned so that they correspond to each other, and while sliding the bent portion 23 and the like on the sliding portion 13, the cut surface 24S is pushed in until the contact portion 14 contacts the contact portion 14. Provided is a method for assembling the storage case 1 that reduces noise and the like and suppresses the generation of shavings during assembly.

Also, in the method of assembling the storage case 1 comprising the base 10 on which the board 30 is mounted and the cover 20 attached to the base 10 so as to accommodate the board 30 inside, A bent portion 23 bent outward with a curvature at an end portion 26 of the covering side portion 22 , a cut surface portion 24 with a cut surface 24S directed toward the base 10 at the end portion 26 other than the bent portion 23 , and the end portion 26 a wall portion 12 that rises from the base portion 11 and fits inside the side portion 22 in the base 10; A sliding portion 13 in which the bent portion 23 slides when the cover 20 is attached, and a contact portion 14 in contact with the cut surface 24S are formed on the outer side of the wall portion 12. The surface portion 24 and the contact portion 14 are aligned so that they correspond to each other, and 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, so that the cut surface 24S becomes the contact portion. An assembly method is provided in which the pushing is stopped when the pawl 25 abuts against 14 and the pawl 25 engages the base 10 . According to this, it is possible to provide a method for assembling the storage case 1 that reduces rattling and noise caused by it, and suppresses the generation of shavings during assembly.

It should be noted that the present invention is not limited to the exemplified embodiments, and can be implemented with a configuration that does not deviate from the content described in each item of the claims. That is, although the present invention has been particularly illustrated and described primarily with respect to particular embodiments, there may be modifications, quantities, Various modifications can be made to other detailed configurations by those skilled in the art.

1 storage case 10 base 11 base portion 12 wall portion 13 sliding portion 14 contact portion 14Z non-contact portion 15 claw portion engaging 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 26 End 30 Board 40 Connector 41 Terminal block

Claims (5)

A storage case comprising a base on which a board is mounted and a cover attached to the base so as to house the board inside,
The cover is
an upper surface;
side portions extending from the top portion and surrounding the base;
a bent portion formed at the end of the side portion and bent outward with a curvature;
a cut surface portion formed at the end portion other than the bent portion, the cut surface facing the base;
a pawl extending from the end and engaging the base;
has
The base is
a base;
a wall portion that rises from the base portion and fits inside the side portion;
a sliding portion formed on the outer side surface of the wall portion, in which the bent portion or the inner surface of the side portion slides when the cover is attached;
a contact portion formed outside the wall portion and in contact with the cut surface;
has
the pawl engages the base;
The contact portion contacts the cut surface,
storage case. the contact portion protrudes from the base portion toward the cover outside the wall portion;
2. The storage case according to claim 1, wherein the length from the upper surface portion to the cut surface of the cut surface portion is shorter than the length from the upper surface portion of the bent portion to the tip of the bent portion. 3. The storage case according to claim 1, wherein the sliding portion protrudes in the outer direction of the wall portion from the outer side surface of the wall portion facing the cut surface portion. A method for assembling a storage case comprising a base on which a substrate is mounted and a cover attached to the base so as to house the substrate inside, the method comprising:
In the cover, a bent portion that is bent outward with a curvature at an end portion of a side portion that covers the periphery of the base, and a cut surface portion that faces the base at the end portion other than the bent portion. a pawl extending from the end and engaging the base;
In the base, a wall portion erected from a base portion and fitted to the inner side of the side portion, a sliding portion in which the bent portion slides on the outer side surface of the wall portion when the cover is attached, and Forming a contact portion that contacts the cut surface on the outside,
Aligning so that the bent portion and the sliding portion and the cut surface portion and the contact portion correspond,
pushing the cover into the base while sliding the inner surface of the bent portion or the side portion on the sliding portion;
stop pushing when the cut surface abuts against the abutting portion;
engaging the pawl with the base;
Assembly method. A method for assembling a storage case comprising a base on which a substrate is mounted and a cover attached to the base so as to house the substrate inside, the method comprising:
The cover is
an upper surface;
side portions extending from the top portion and surrounding the base;
a bent portion formed at the end of the side portion and bent outward with a curvature;
a cut surface portion formed at the end portion other than the bent portion, the cut surface facing the base;
a pawl extending from the end and engaging the base;
has
The base is
a base;
a wall portion that rises from the base portion and fits inside the side portion;
a sliding portion formed on the outer side surface of the wall portion, in which the bent portion or the inner surface of the side portion slides when the cover is attached;
a contact portion formed outside the wall portion and in contact with the cut surface;
has
Aligning so that the bent portion and the sliding portion and the cut surface portion and the contact portion correspond,
pushing the cover into the base while sliding the inner surface of the bent portion or the side portion on the sliding portion;
stop pushing when the cut surface abuts against the abutting portion;
engaging the pawl with the base;
Assembly method.

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