JP2018032678A - Housing for electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a housing for electronic equipment capable of preventing breakage of a case and a cover even when the cover is pulled frontward strongly in a state where upward movement of the cover to the case is restricted.SOLUTION: A housing for electronic equipment comprises a box-like case and a box-like cover 26 attached to the case by an attachment structure. The attachment structure has: a columnar projection and an attachment piece provided at an upper end part of the case; a screw hole provided on the attachment piece; a first hole 11 provided at an upper end part of the cover 26 and fitted with the columnar projection; a second hole 12 overlapped with the screw hole in a vertical direction; and a fixing screw screwed into the screw hole through the second hole 12. At the upper end part of the cover 26, a slit 27 starting from the second hole 12 and extending to an opening edge 34 of the cover 26 is formed. The slit 27 is formed in an arcuate shape using the first hole 11 as a center, in a downward view.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electronic device casing including a box-shaped case and a box-shaped cover.

  Conventionally, a housing of an electronic device is often formed such that an operation unit or a display unit is exposed on the front surface. As this type of housing, there is a housing that can be divided into two in the front-rear direction by a box-shaped case that accommodates a printed circuit board or an electronic component and a box-shaped cover that closes an opening of the case. In such a case, when the cover is disposed at the front end of the case, the cover is attached to and detached from the case from the front so that the maintenance of the components in the case can be easily performed from the front. It is desirable to adopt a configuration. Here, this type of conventional electronic device casing will be described with reference to FIG.

  The electronic device casing 1 shown in FIG. 7 includes a box-shaped case 2 that opens toward the front of the casing 1 and a box-shaped cover 3 that opens toward the case 2. The case 2 and the cover 3 are each made of a plastic material. The upper end portion of the case 2 is provided with a columnar columnar protrusion 4 protruding upward and a mounting piece 6 having a screw hole 5. The screw hole 5 is formed by embedding a female screw member 7 in the mounting piece 6.

A plurality of small protrusions 8 are provided on both sides of the opening 2 a of the case 2. These small protrusions 8 are provided at two locations arranged in the vertical direction on one side and the other side of the case 2, respectively.
A plurality of through holes 9 are formed at the lower end of the opening 2 a of the case 2.

  On the other hand, in the upper end portion of the cover 3 and the rear end portion (end portion close to the case 2), the first and second holes 11 and 12 are formed in a state of being aligned in the left-right direction. The columnar protrusion 4 described above is fitted into the first hole 11 when the cover is attached. In the second hole 12, a fixing screw is inserted from above when the cover is attached. This fixing screw is screwed into the screw hole 5 of the female screw member 7 described above.

In the opening 3 a of the cover 3, a plurality of guide plates 13 that are inserted into the opening of the case 2 along both sides of the case 2 are provided. The cover 3 shown in FIG. 7 is provided with four guide plates 13 arranged in the vertical direction on one side and the other side. An engagement hole 14 is formed between the upper two guide plates 13 and the lower two guide plates 13 among these guide plates 13. The engagement hole 14 is engaged with the small protrusion 8 described above, and is provided with an entrance / exit portion 14a that opens at the rear end (tip on the case 2 side) of the guide plate 13 and on the front side of the entrance / exit portion 14a. The extending engaging portion 14b is formed.
A plurality of projections 15 projecting downward are provided at the lower end portion of the opening 3 a of the cover 3. These protrusions 15 are fitted into the through holes 9 of the case 2 in a state where the cover 3 is attached to the case 2.

  In order to attach the cover 3 to the case 2 in the conventional electronic device casing 1 configured as described above, first, the cover 3 is shifted upward with respect to the case 2 as shown in FIG. The opening 3 a of the cover 3 is brought close to the opening 2 a of the case 2. Then, the guide plate 13 of the cover 3 is inserted into the opening 2a of the case 2, and the small protrusion 8 of the case 2 is inserted into the engaging portion 14b from the entrance / exit portion 14a of the engaging hole 14 as shown in FIG. . Next, the cover 3 is slid downward with respect to the case 2 in such a state that the opening 2 a of the case 2 and the opening 3 a of the cover 3 overlap each other.

As the cover 3 slides downward, the columnar protrusion 4 is fitted into the first hole 11, and the small protrusion 8 enters the upper end of the engaging portion 14 b of the engaging hole 14 as shown in FIG. 10. Although not shown, the protrusion 15 at the lower end of the cover 3 is fitted in the through hole 9 of the case 2. In this state, a fitting-type attachment portion composed of the columnar protrusion 4 and the first hole 11, an attachment portion composed of the small protrusion 8 and the engagement hole 14, and an attachment composed of the through hole and the protrusion at the lower end portion. The cover 3 is attached to the case 2 by the part, and the cover 3 cannot be removed from the case 2 forward. In this state, the cover 3 is fixed to the case 2 by passing the fixing screw 16 through the second hole 12 and screwing it into the screw hole 5.
On the other hand, the cover 3 can be removed from the case 2 by removing the fixing screw 16 and pulling the cover 3 upward with respect to the case 2 and then pulling the cover 3 forward with respect to the case 2. it can.

  7 has a problem that the attachment piece 6 of the case 2 may be damaged when the cover 3 is pulled forward with respect to the case 2. The reason why the mounting piece 6 is damaged in this way is that the portion of the case 2 that is rigidly coupled to the cover 3 is only the mounting piece 6, and the tensile force applied to the cover 3 concentrates on the mounting piece 6. Because it ends up.

  The present invention has been made to solve such problems, and in an electronic device casing that is removed forward after the cover slides upward with respect to the case, the upward movement of the cover with respect to the case is performed. An object of the present invention is to provide an electronic device casing in which the case and the cover are not damaged even if the cover is pulled strongly forward in a restricted state.

  In order to achieve this object, an electronic device casing according to the present invention has an electronic device case formed in a box shape that opens forward, and an opening facing the opening of the case. A box-shaped cover that is detachably attached to the opening of the case by a fitting-type attachment structure, and the attachment structure is provided at the upper end of the case and is above the opening of the case A protrusion projecting toward the upper end of the case, and a mounting piece that overlaps the lower surface of the upper end of the cover with the cover attached to the case, and extends vertically in the mounting piece. A screw hole provided in the upper end of the cover, and a first hole that fits into the protrusion, and provided in the upper end of the cover. In the vertical direction with the screw hole And a fixing screw screwed into the screw hole through the second hole, the upper end of the cover from the second hole to the opening edge of the cover An extending slit is formed, and the slit is formed in an arc shape centered on the first hole as viewed from above.

  According to the present invention, in the electronic device casing, fine unevenness may be provided on an inner wall surface of the slit.

  In the electronic device casing according to the present invention, the protrusion of the case is fitted into the first hole of the cover, and the fixing screw passed through the second hole of the cover is screwed into the screw hole on the case side. The cover is attached to the case. When the cover is pulled forward with respect to the case in this mounted state, the upper end of the cover opening pushes the protrusion and the fixing screw forward, and the tensile force is pulled from the cover through the protrusion and the fixing screw. Transmitted to the side.

When the tensile force is excessively large, the upper end portion having the slit of the cover strongly presses the fixing screw, so that the fixing screw enters the slit while widening the gap of the slit. At this time, since the forward movement relative to the case is restricted by the protrusion, the cover is displaced in a direction along an arc centered on the protrusion. The slit is formed along the direction in which the cover is displaced in this way. For this reason, when an excessive tensile force is applied to the cover, the fixing screw advances along the slit in the slit, and the tensile force transmitted to the mounting piece via the fixing screw is relaxed. .
Therefore, according to the present invention, even when the cover is strongly pulled forward with respect to the case in a state where the upward movement of the cover with respect to the case is restricted, the case for the electronic device is not damaged. The body can be provided.

It is a perspective view of the electronic device provided with two or more cases for electronic devices concerning the present invention. It is a perspective view which shows the case and cover of the housing | casing for electronic devices which concern on this invention. It is a top view which shows the principal part of a cover. It is a longitudinal cross-sectional view of the principal part. FIG. 4 shows a state where a cover is attached to the case. It is a top view of the principal part which shows the state which the screw for fixing entered in the slit. It is a top view which shows the slit which has a fine unevenness | corrugation in a wall surface. It is a perspective view of the case and cover of the conventional housing | casing for electronic devices. It is a longitudinal cross-sectional view of a part of a conventional electronic device casing. FIG. 8 shows a state in the middle of bringing the cover close to the case. It is a longitudinal cross-sectional view of a part of a conventional electronic device casing. FIG. 9 shows a state where the opening of the case and the opening of the cover are in contact with each other. It is a longitudinal cross-sectional view of a part of a conventional electronic device casing. FIG. 10 shows a state where the cover is slid downward with respect to the case.

  Hereinafter, an embodiment of an electronic device casing according to the present invention will be described in detail with reference to FIGS. In these drawings, members that are the same as or equivalent to those described with reference to FIGS. 7 to 10 are denoted by the same reference numerals, and detailed description thereof is omitted as appropriate.

An electronic device 21 shown in FIG. 1 includes modules 22 as a plurality of electronic devices arranged in the horizontal direction, and a plate-like base unit 23 that detachably supports these modules 22. The module 22 is configured using an electronic device casing 24 (see FIG. 2) according to the present invention.
As shown in FIG. 2, the electronic device casing 24 includes an electronic device case 2 and a box-like cover 26 that is detachably attached to the opening 2 a of the case 2 by a fitting-type attachment structure 25. ing. The cover 26 is different from the conventional cover shown in FIG. 7 in that a later-described slit 27 is provided between the second hole 12 and the rear end, and the other configurations are the same. Has been.

  The attachment structure 25 includes a first attachment portion 31 provided at the upper end portions of the case 2 and the cover 26, a second attachment portion 32 provided at both side portions, and a third attachment portion provided at the lower end portion. 33 or the like.

  The first attachment portion 31 includes a columnar protrusion 4 of the case 2, an attachment piece 6 having a screw hole 5, first and second holes 11 and 12 provided in the upper end portion of the cover 26, and fixing screws. 16 or the like.

The columnar protrusion 4 is provided at the upper end of the case 2 and protrudes upward and forward from the opening of the case 2.
The screw hole 5 is formed in the female screw member 7 embedded in the mounting piece 6 by insert molding, and is provided so as to extend in the vertical direction.
The attachment piece 6 is provided at the upper end portion of the case 2 and overlaps the lower surface of the upper end portion of the cover 26 in a state where the cover 26 is attached to the case 2 as shown in FIG.

The first hole 11 and the second hole 12 are provided at the upper end portion of the cover 26 and in the vicinity of the opening portion 26a. The first hole 11 is fitted to the columnar protrusion 4 in a state where the cover 26 is attached to the case 2. As shown in FIG. 4, the second hole 12 overlaps the screw hole 5 in the vertical direction with the cover 26 attached to the case 2. The second hole 12 is a through hole formed so that the hole diameter is constant from the upper end to the lower end. The hole diameter of the second hole 12 is a hole diameter through which the screw portion 16a of the fixing screw 16 can be inserted.
The fixing screw 16 is screwed into the screw hole 5 through the second hole 12 when the cover 26 is attached to the case 2. The fixing screw 16 according to this embodiment has a structure in which the head portion 16 b protrudes upward from the upper surface 26 b of the cover 26.

The second mounting portion 32 includes the small protrusion 8 of the case 2, the guide plate 13 and the engagement hole 14 of the cover 26, and the like.
The third attachment portion 33 is configured by the through hole 9 at the lower end portion of the case 2, the protrusion 15 at the lower end portion of the cover 26, and the like.

  As shown in FIG. 4, the slit 27 of the cover 26 penetrates the upper end of the cover 26 in the vertical direction. As shown in FIG. 3, the slit 27 of the cover 26 starts from the second hole 12 and reaches the opening edge 34 of the cover 26. It extends. For this reason, the second hole 12 is opened to the rear of the cover 26 through the slit 27. As shown in FIG. 3, the planar shape of the slit 27 is an arc shape having a radius R with the first hole 11 as the center.

  The width A (see FIG. 3) of the slit 27 is defined based on the size (screw diameter) of the fixing screw 16 so as to satisfy a predetermined condition. The predetermined condition is that when the front end of the slit 27 is pressed against the screw portion 16 a of the fixing screw 16 with a predetermined force, the upper end portion of the cover 26 is widened with the slit 27 as a center. It is to deform in the left-right direction. The width A can be, for example, about 1/3 to about 1/2 of the hole diameter (screw diameter) of the second hole 12.

  The electronic device casing 24 thus configured can be assembled in the same manner as the conventional electronic apparatus casing 1 shown in FIG. When the cover 26 is pulled forward with respect to the case 2 in a state where the electronic device casing 24 is assembled, the upper end portion of the opening 26a of the cover 26 pushes the columnar protrusion 4 and the fixing screw 16 forward, A tensile force is transmitted from the cover 26 to the case 2 side through the columnar protrusion 4 and the fixing screw 16.

  When the tensile force is excessively large, the upper end portion of the cover 26 having the slit 27 strongly presses the fixing screw 16 so that the fixing screw 16 enters the slit 27 while widening the gap of the slit 27. Become. At this time, since the forward movement with respect to the case 2 is restricted by the columnar protrusion 4, the cover 26 is displaced in a direction along an arc centered on the columnar protrusion 4 as shown in FIG. 5. The slit 27 is formed in an arc shape having a radius R centering on the columnar protrusion 4 (first hole 11) so as to extend in the direction in which the cover 26 is displaced at this time.

For this reason, when an excessive tensile force is applied to the cover 26, the fixing screw 16 enters the slit 27 and the cover 26 moves relative to the fixing screw 16. The tensile force transmitted to the attachment piece 6 via the pressure is alleviated.
Therefore, according to this embodiment, even if the cover 26 is strongly pulled forward with respect to the case 2 in a state where the upward movement of the cover 26 with respect to the case 2 is restricted, the case 2 is damaged. It is possible to provide a housing for electronic equipment that does not occur.

In the electronic device casing 24 according to this embodiment, since the slit 27 is formed in an arc shape with the first hole 11 as the center, compared to a case where the slit 27 is formed in a linear shape extending in the front-rear direction, The force transmitted to the case 2 side via the fixing screw 16 is reduced. For this reason, according to this embodiment, damage to the attachment piece 6 can be reliably prevented.
When the fixing screw 16 enters the slit 27, the cover 26 is pushed backward with respect to the fixing screw 16 so that the fixing screw 16 is positioned in the second hole 12. The cover 26 can be returned and used again.

<Modified example of slit>
The slit can be formed as shown in FIG. In FIG. 6, members that are the same as or equivalent to those described with reference to FIGS. 1 to 5 are given the same reference numerals, and detailed descriptions thereof are omitted as appropriate.

A large number of fine irregularities 41 are provided on the inner wall surface of the slit 27 shown in FIG. The unevenness 41 is formed over the entire inner wall surface, and provides resistance when the fixing screw 16 advances in the slit 27.
According to this embodiment, since the fixing screw 16 that has entered the slit 27 is difficult to advance in the slit 27, the fixing screw 16 passes through the slit 27 when an excessive tensile force is applied to the cover 26. Can be prevented. If the fixing screw 16 passes through the slit 27, the movement of the cover 26 cannot be restricted and the cover 26 can be easily detached from the case 2. However, according to this embodiment, since the fixing screw 16 stays in the slit 27, the state where the cover 26 is assembled to the case 2 can be maintained.

  DESCRIPTION OF SYMBOLS 2 ... Case, 2a, 26a ... Opening part, 4 ... Columnar protrusion, 5 ... Screw hole, 6 ... Mounting piece, 7 ... Female screw member, 11 ... 1st hole, 12 ... 2nd hole, 16 ... Fixing screw 24 ... Housing for electronic equipment, 25 ... Mounting structure, 26 ... Cover, 27 ... Slit, 41 ... Uneven.

Claims (2)

A case for electronic equipment formed in a box shape opening toward the front;
A box-like cover having an opening facing the opening of the case, and detachably attached to the opening of the case by a fitting-type attachment structure;
The mounting structure is
A protrusion provided at the upper end of the case and protruding upward and forward from the opening of the case;
An attachment piece that is provided at the upper end of the case and overlaps the lower surface of the upper end of the cover with the cover attached to the case;
A screw hole provided in the mounting piece so as to extend in the vertical direction;
A first hole provided at an upper end portion of the cover and fitted with the protrusion;
A second hole that is provided at an upper end of the cover and that overlaps the screw hole in a vertical direction in a state where the cover is attached to the case;
A fixing screw screwed into the screw hole through the second hole;
A slit extending from the second hole to the opening edge of the cover is formed at the upper end of the cover,
The slit for the electronic device is formed in an arc shape centering on the first hole as viewed from above. The electronic device casing according to claim 1,
A casing for electronic equipment, wherein fine irregularities are provided on an inner wall surface of the slit.

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