JP2008305869A - Accommodation case - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an accommodation case which can improve a performance of mounting a lid to a warped main body of the case. <P>SOLUTION: In a resin-made accommodation case 1 having a main body 2 and a lid 3 to be mounted to the main body 2, the lid 3 has a flange 31 to be inserted within the main body 2 when mounted to the main body 2, and the width of the flange 31 at both ends of the lid 3 in its longitudinal direction is made longer than the width of the flange at its center part in the longitudinal direction so that, when the lid 3 is fitted to the main body 2, the flange 31 is inserted within the main body 2 from the both ends of the longitudinal direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a storage case that stores electronic components such as an ECU mounted on a vehicle.

It is known that a resin molded body manufactured by an injection molding method is likely to be warped due to a residual stress in the resin.
In particular, in a box-shaped molded body having an opening as shown in FIG. 1, a large warp occurs in the opening. When the lid is assembled to the case in which such warpage occurs, the lid collar shown in FIG. 1 comes into contact with a large warp portion of the case opening, and the lid cannot be closed.

  In Patent Document 1, a storage case having a case body and a cap is provided with a fitting cylinder portion for externally fitting the cap on the entrance / exit side of the case body, and before the long side portion of the entrance / exit of the fitting cylinder portion is formed. The wall and the rear wall are formed as outer bulges. This prevents the front and rear walls from being deformed in a concave shape inside the case due to strain stress during molding.

JP-A-5-124690

As mentioned above, when the lid is attached to the housing, if the housing is warped, it becomes difficult to attach the lid to the opening due to the warpage, or a jig for assembly is required. become.
The technology disclosed in Patent Document 1 is also a technology for preventing the concave deformation of the fitting tube portion, and does not disclose a technology for improving the assembling property of the lid to the case body in which warpage occurs.

  This invention is made | formed in view of the said situation, and it aims at providing the storage case which improved the assembly | attachment property of the lid | cover.

In order to achieve this object, the storage case of the present invention is a storage case having a case main body and a lid portion attached to the case main body, and the lid portion is attached to the case main body when the case is attached. A flange portion to be inserted into the body, wherein the length of the flange portion in the insertion direction is longer at both ends in the longitudinal direction than the longitudinal center portion of the lid portion, and the lid portion is formed in the case. When it attaches to a main body, it has the structure which the said collar part was inserted in the said case main body from the both ends of the said longitudinal direction.
Even if the case main body is warped and the attachment port for attaching the lid portion is small, the flange of the lid portion is inserted from both ends of the small sled to push back the sled generated in the case main body. Therefore, it is possible to insert the brim into the case body without difficulty even at a location where the warp of the central portion is large.

Moreover, in the said storage case, it is good to make the thickness of the said collar part thicker in the both ends of the said longitudinal direction rather than the center part of the longitudinal direction of the said cover part. Furthermore, the contact surface of the collar portion with the case main body has an inclined surface inclined toward the tip from the connecting portion side with the lid portion, and the inclination angle of the inclined surface is determined in the longitudinal direction of the lid portion. You may make it larger in the both ends of the said longitudinal direction rather than the center part.
Therefore, it is possible to insert the collar of the lid portion from both ends of the small sledge, and to easily insert the collar into the case body even at a location where the sledge of the central portion is large.

Moreover, the said storage case WHEREIN: The said collar part is good to have a left-right symmetric shape with respect to the longitudinal direction of the said cover part.
Therefore, the strength of the storage case can be maintained in the longitudinal direction of the lid.

  In the storage case, a substrate on which an electronic device is mounted may be stored in the storage case.

  ADVANTAGE OF THE INVENTION According to this invention, the assembly | attachment property of the lid | cover to the case main body which the curvature produced can be improved.

  The best embodiment of the present embodiment will be described with reference to the accompanying drawings.

  In FIG. 2, the structure of the storage case 1 of a present Example is shown. The present embodiment includes a storage case main body 2, a lid portion 3 serving as a lid of the storage case main body 2, and a substrate 4 stored in the storage case 1.

The storage case body 2 is a resin case formed by injection molding. The storage case body 2 is a box-shaped molded body having an opening 5 for storing the substrate 4 therein.
Since the storage case main body 2 is formed by injection molding, the opening 5 is warped as shown in FIG. The warp generated in the opening 5 is large at the central portion in the longitudinal direction of the opening 5 and decreases toward the end. On the end side, the generated warp is small because the case body 2 is a support, and a large warp is generated because there is no support in the central portion. That is, the warp is greatly generated on the surface of the case body including the long side of the opening 5.

  As shown in FIG. 2, the lid 3 includes a collar 31 stored in the storage case main body 2 when assembled to the storage case main body 2, and a hook member 32 for fixing the lid 3 to the storage case main body 2. have. The lid 3 is fixed to the storage case body 2 by engaging the hook member 32 with the claw 21 provided on the storage case body 2 side.

  Mounted on the substrate 4 are ECU electronic components (not shown) for controlling the vehicle, connectors 41 for connecting the ECU and other electronic devices, and the like.

4A to 4C are top views of the lid 3 as viewed from above. The collar 31 provided on the lid 3 has a shape that is wide at the end in the longitudinal direction of the lid 3 and narrow at the center.
5A shows the cross-sectional shape cut along the line AA ′ shown in FIGS. 4A to 4C, and FIG. 5B shows BB ′ shown in FIGS. 4A to 4C. The shape of the cross section cut | disconnected by the line is shown. As apparent from a comparison between FIG. 5A and FIG. 5B, the width of the collar 31 at the end in the longitudinal direction of the lid 3 is wider than the width of the collar 31 at the center.
The shape of the collar 31 may be an arc shape shown in FIG. 4B as long as it is wide at the longitudinal end of the lid 3 and narrow at the center. An obliquely cut shape shown in 4 (C) may be used.
Moreover, it is preferable that the shape of the collar 31 is left-right symmetric in the longitudinal direction of the collar 31 as shown in FIGS. This is because the collar 31 plays a role of maintaining the strength of the storage case when the collar 31 is inserted into the storage case body 2.

As described above, since the storage case body 2 is formed by injection molding, a warp that is bent inside the case occurs in the opening 5 of the storage case body 2. The warp generated in the opening 5 is large at the central portion of the opening 5 and decreases toward the end.
For this reason, in this embodiment, the shape of the collar 31 of the lid portion 3 is made wide at the longitudinal end portion of the lid portion 3 and narrow at the center portion as shown in FIG. When attaching to the storage case main body 2, the collar 31 is inserted into the storage case main body 2 from the end side of the opening 5 having a small warp.
When the lid 3 is assembled to the storage case body 2, the collar 31 of the lid 3 is aligned with the opening 5 of the storage case body 2, and the lid 3 is pressed toward the storage case body 2. Since the collar 31 has a wide width at the end portion in the longitudinal direction of the lid portion 3, as shown in FIG. 6, when the lid portion 3 is attached, it is inserted into the storage case body 2 from the end portion side. FIGS. 6A to 6C sequentially show how the lid portion 3 is pressed toward the storage case body 2 and the collar 31 is inserted into the storage case body 2. The collar 31 inserted into the opening 5 from the end side pushes back the sled generated in the opening 5, so that the collar 31 can be inserted into the storage case body 2 without difficulty even at a location where the warp in the central portion is large. it can. For this reason, the lid 3 can be easily assembled to the storage case body 2 without using a jig or the like. Therefore, the assembling property of the lid 3 to the storage case main body 2 can be improved.
Moreover, since the sled generated in the storage case main body 2 can be pushed back by the lid portion 3 having the above-described shape, the standard of the sled generated in the storage case main body 2 can be relaxed. Therefore, it is possible to improve the productivity of the storage case 1 by reducing the cost of correcting the mold and shortening the development period.
Further, when the collar 31 of the lid 3 is inserted into the storage case main body 2, it is pressed in the vertical direction by the warp of the storage case main body 2 as shown in FIG. It is possible to prevent rattling from occurring when

Moreover, the structure of the collar 31 of the cover part 3 is not limited to FIG. 4 (A)-(C). For example, in the lid portion 3 shown in FIGS. 8A and 8B, the thickness of the collar 31 is changed between the end portion in the longitudinal direction of the lid portion 3 and the central portion. At the end where the warp is small, the thickness of the collar 31 is increased as shown in FIG. 8A, and at the center portion where the warp is large, the thickness of the collar 31 is decreased as shown in FIG. 8B.
8 (C) and 8 (D), the contact surface of the collar 31 that contacts the storage case main body 2 is inclined, and this inclination is inclined at the end portion and the central portion of the lid portion 3 in the longitudinal direction. It has changed. At the end portion where the warp is small, the contact surface of the collar 31 is gently inclined as shown in FIG. 8C, and at the central portion where the warp is large, the contact surface is inclined as shown in FIG. 8D. Increase
Even in the lid portion 3 having the collar 31 having such a structure, it is possible to improve the assembling property to the storage case main body 2 where the warp has occurred.

The embodiment described above is a preferred embodiment of the present invention. However, the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention.
For example, although the embodiment has been described based on a resin case formed by injection molding, other molding methods may be used.
Further, the present invention can be applied to the case material amount as long as the case is warped in addition to the resin as the main raw material.

It is a figure which shows the structure of the conventional storage case. It is a figure which shows the whole structure of the storage case of an Example. It is a figure which shows the storage case main body and the sled which arises in the opening. It is a top view of a cover part. (A) is sectional drawing which shows the shape of the cross section cut | disconnected by the AA 'line shown in FIG. 4, (B) is sectional drawing which shows the shape of the cross section sheared by the BB' line shown in FIG. It is a figure which shows a mode when attaching a cover part to a storage case main body. It is a figure which shows the state which assembled | attached the cover part to the storage case main body. It is a figure which shows the other form of a cover part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Storage case 2 Storage case main body 3 Cover part 4 Board | substrate 21 Claw 31 Collar 32 Hook member 41 Connector

Claims (5)

A storage case having a case main body and a lid attached to the case main body,
The lid portion has a collar portion that is inserted into the case body when attached to the case body,
When the length of the flange portion in the insertion direction is made longer at both end portions in the longitudinal direction than the center portion in the longitudinal direction of the lid portion, both end portions in the longitudinal direction are attached when the lid portion is attached to the case body. A storage case, wherein the collar portion is inserted into the case main body.   The storage case according to claim 1, wherein a thickness of the collar portion is made thicker at both end portions in the longitudinal direction than a central portion in the longitudinal direction of the lid portion. The contact surface of the collar portion with the case main body has an inclined surface inclined toward the tip from the connecting portion side with the lid portion,
The storage case according to claim 1, wherein an inclination angle of the inclined surface is made larger at both ends in the longitudinal direction than in a central portion in the longitudinal direction of the lid.   The storage case according to any one of claims 1 to 3, wherein the collar portion has a symmetrical shape with respect to the longitudinal direction of the lid portion.   The storage case according to any one of claims 1 to 4, wherein a substrate on which an electronic device is mounted is stored in the storage case.

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