JP6614874B2 - Electronic equipment case - Google Patents

Description

  The present invention relates to an electronic device case that accommodates an electronic component therein and is used for a vehicle or the like.

  Japanese Patent Application Laid-Open No. H10-228667 describes an electronic device casing formed by fitting an upper cover and a lower cover. In the electronic device casing, fitting portions each including a flat portion and an inclined portion are formed on the peripheral portions of the upper cover and the lower cover, respectively. When the upper cover and the lower cover are tightened with screws, the inclined portions of the fitting portions of the upper cover and the lower cover are brought into pressure contact with each other. By forming a fitting portion on the entire peripheral edge of the upper cover and the lower cover, the upper cover and the lower cover are prevented from shifting when the upper cover and the lower cover are fixed with screws.

JP 11-251764 A

  In the case of the electronic device casing of Patent Document 1, since the peripheral portions of the upper cover and the lower cover are concavo-convexly fitted around the entire circumference, the fitting portion between the upper cover and the lower cover is weakly in contact with the portion that strongly contacts. There is a non-uniform contact state over the entire circumference, such as a portion that contacts or a portion where a gap is formed.

  For this reason, the fitting of the upper case and the lower case becomes unstable. For example, in the case of in-vehicle use, rubbing occurs between the upper case and the lower case at the fitting portion due to vibration of the automobile, and a squeak noise is generated. Problems that occur are likely to occur.

  The present invention solves the above-described conventional problems, and provides an electronic device case in which the first case and the second case can be stably fitted and squeak noise caused by vibration can be suppressed. It is aimed.

The electronic device case of the present invention is an electronic device case in which the first case and the second case are combined and fixed by a plurality of screwing portions.
On the side wall portion of the second case, a convex portion protruding toward the first case from a wall end surface facing the first case is locally formed at a position away from the screwing portion,
A concave portion facing the convex portion is formed in the side wall portion of the first case, and the concave portion is directed from the surface of the side wall portion of the first case facing the second case toward the inside of the side wall portion. Formed,
The convex portion has two outer peripheral surfaces that face each other in the plate thickness direction of the side wall portion of the second case, and the two outer peripheral surfaces both come closer to each other toward the first case. Tilt,
The concave portion has two inner peripheral surfaces facing each other in the thickness direction of the side wall portion of the first case, and the two inner peripheral surfaces are both separated from each other toward the second case. Tilt,
The inner angle formed by the two opposed inner peripheral surfaces is larger than the inner angle formed by the two opposed outer peripheral surfaces,
The convex part and the concave part are concavo-convexly fitted to form a fitting part, and in the fitting part, the convex part is in contact with each of the two inner peripheral surfaces of the concave part, The convex portion is restricted in the plate thickness direction of the side wall portions of the first case and the second case .

  In the electronic device case of the present invention, a local fitting portion is formed between the side wall portion of the first case and the side wall portion of the second case, and the side wall portion is restrained in the plate thickness direction by this fitting portion. ing. Therefore, the combination of the first case and the second case is stable, and it is difficult for the cases to rub and generate squeak noise.

  In the fitting portion, it is preferable that the convex portion is not constrained in the circumferential direction in which the side wall portion extends in the concave portion.

  In the above structure, the force when the first case and the second case are fixed by screwing acts so as to restrain the fitting portion only in the thickness direction of the side wall portion. The case is stably combined.

  In the present invention, in the portion where the fitting portion is not formed, a gap S2 in the combination direction of two cases is formed between the side wall portion of the first case and the side wall portion of the second case. It is preferable.

  In the above configuration, the convex portion and the concave portion can be strongly pressed against each other by a force when the first case and the second case are fixed by screwing.

  In the present invention, it is preferable that at least one of the first case and the second case is elastically deformed in a direction approaching the other with the fitting portion as a fulcrum when screwed.

  In the above configuration, an excessive force is not applied to the fitting portion and it is not damaged, and also loosening can be prevented.

  In the present invention, one of the side wall portion of the first case and the side wall portion of the second case is formed with an inner ridge portion, and the other is formed with an outer ridge portion facing the outside of the inner ridge portion. In the state where the convex portion and the concave portion are fitted, it is preferable that a gap S1 is formed between the inner ridge portion and the outer ridge portion.

  In the above configuration, the gap S2 between the side wall portion of the first case and the side wall portion of the second case can be closed by the inner ridge portion and the outer ridge portion, and the inner ridge portion and the outer ridge portion. Therefore, it is possible to prevent a squeak noise caused by rubbing between the protrusions when external vibration is applied.

  In this case, it is preferable that a protrusion that fills the gap is formed on at least one of the inner protrusion and the outer protrusion at a location near the screwing portion.

  By forming the protrusion, when the fitting force by screwing acts on the first case and the second case, the inner ridge and the outer ridge are in contact with each other in a region where this force acts greatly. Can be prevented.

  In the present invention, it is preferable that the fitting portion is formed at an intermediate portion between the screwing portion and the screwing portion.

  In the above configuration, the convex portion and the concave portion can be reliably brought into pressure contact with a force that screws the first case and the second case.

  The electronic device case of the present invention can form a partially uneven fitting at the combination portion of the first case and the second case, and can stabilize the coupling between the first case and the second case. It becomes easy to prevent the occurrence of rubbing due to external vibration.

It is a disassembled perspective view of the electronic device case which concerns on embodiment of this invention. It is an external appearance perspective view of the electronic device case which concerns on embodiment of this invention. It is sectional drawing which cut | disconnected the fitting part shown in the enlarged view of FIG. 2 by the III-III line. It is sectional drawing which cut | disconnected the fitting part shown in the enlarged view of FIG. 2 by the IV-IV line. It is sectional drawing which cut | disconnected the outer side protrusion part and the inner side protrusion part shown in the enlarged view of FIG. 2 by the VV line. It is assembly explanatory drawing of the electronic device case which concerns on embodiment of this invention, and is sectional drawing which cut | disconnected the 1st case and 2nd case which were shown in FIG. 2 by the VI-VI line. It is the top view which looked at the 1st case shown in Drawing 1 from the 2nd case side, and shows the position of the projection arrange | positioned at a 1st case enclosed with the broken line. It is sectional drawing which cut | disconnected the processus | protrusion of the partially expanded view shown in FIG. 7 by the VIII-VIII line, and was seen from the plate | board surface direction.

  FIG. 1 is an exploded perspective view showing a configuration of an electronic device case 1 according to an embodiment of the present invention, and FIG. 2 is an external perspective view. An electronic device case 1 shown in FIG. 1 is used as an electronic device case for a vehicle that houses electronic devices such as electronic components of an imaging device equipped in various vehicles and is fixed to the vehicle with a belt or the like.

  As shown in FIGS. 1 and 2, the electronic device case 1 is a square box-shaped case made up of a first case 10 and a second case 20 made of synthetic resin. Each of the first case 10 and the second case 20 has an opening on one side as a whole, and is screwed at a plurality of locations in a state of facing each other so as to close each opening.

  In addition, although the case where the ceiling of the 2nd case 20 is dome shape is illustrated in this Embodiment, it is not restricted to this, For example, the ceiling of the 2nd case 20 may be flat form. . Moreover, although the case where the notch 25 for mounting | wearing with the connector for wiring etc. was formed in the edge part of the 2nd case 20, this notch 25 does not need to be provided.

As shown in FIGS. 1 and 2, the first case 10 has a side wall portion 11, and the side wall portion 11 surrounds the opening of the case. A wall end surface 11 a facing upward (Z2 side) is formed on the side wall portion 11. The wall end surface 11a is a plane parallel to the XY plane. Side walls 21 are formed in the second case 20. The side wall 21 surrounds the opening of the second case. A wall end face 21 a facing downward (Z1 side) is formed on the side wall 21. As shown in FIG. 3, the wall end surface 21a is a plane parallel to the XY plane.

  In the electronic device case 1, the four corners P of the first case 10 and the second case 20 are screwed in a state where the wall end surface 11a of the first case 10 and the wall end surface 12a of the second case face each other. ing. The first case 10 is provided with a boss 12 integrally formed on the inside from the side wall portion 11 in each of the four corner portions P, and a through hole 12a through which the screw 2 is passed is formed in each boss 12. . In the second case 20, bosses 22 are formed at positions facing the bosses 12, and the bosses 22 are integrally formed inside the side wall portion 21. Each boss 22 is formed with a female screw hole 22a. By screwing the screw 2 into the female screw hole 22a of the boss 22 of the second case 20 through the through hole 12a of the boss 12 of the first case 10, the first case 10 and the second case 20 are screwed in four corners. Stopped and fixed.

  Fitting portions 40, 40 are formed at opposing portions of the wall end surface 11 a of the first case 10 and the wall end surface 21 a of the second case 20. The fitting portions 40 and 40 are portions extending in the X direction of the side wall portions 11 and 21 and are formed at locations that are not screwed. That is, each fitting part 40 and 40 is arrange | positioned between the screwing part by the screw 2 arrange | positioned at intervals in the X direction, and the screwing part, Preferably it is arrange | positioned in the intermediate point.

  The fitting parts 40 and 40 are for fitting the first case 10 and the second case 20 locally. As shown in the enlarged views of FIGS. 1 and 2, in the fitting portions 40 and 40, the concave portion 41 and the convex portion 42 are concavo-convexly fitted.

  In order to make the configuration easy to understand, in the enlarged view of FIG. 2, the second case 20 is cut at the surface of the wall end surface 21 a and the configuration other than the convex portion 42 and the inner ridge portion 24 is omitted.

  As shown in the enlarged view of the first case 10 in FIG. 1, the first case 10 is formed with a thick portion 43 in which a part of the side wall portion 11 is thick, and a surface 43 a of the thick portion 43. A recess 41 is formed in the bottom. The concave portion 41 has a long shape whose long side faces in the circumferential direction (X direction) in which the side wall portion 11 extends.

  As shown in the enlarged view of the second case 20 in FIG. 1, a convex portion 42 is integrally formed on a portion of the wall end surface 21 a of the side wall portion 21 that faces the concave portion 41. The convex part 42 protrudes toward the first case 10. The convex part 42 has a long shape with long sides facing in the circumferential direction (X direction) in which the side wall part 21 extends.

  When the first case 10 and the second case 20 are screwed, the convex portion 42 is inserted into the concave portion 41 and is fitted to each other. At this time, the first case 10 and the second case 20 are elastically deformed in a direction approaching each other with the fitting portion 40 as a fulcrum.

Hereinafter, the concave portion 41 and the convex portion 42 of the present embodiment will be described in more detail. FIG. 3 is a cross-sectional view of the concave portion 41 and the convex portion 42 (fitting portion 40) shown in the enlarged view of FIG. 2 taken along the line III-III . 4 is a cross-sectional view of the concave portion 41 and the convex portion 42 shown in the enlarged view of FIG. 2 taken along line IV-IV .

  As shown in FIG. 3, when the concave portion 41 is viewed from the X direction, the inner peripheral surface 41a of the concave portion 41 along the plate surface direction (X direction) is inclined with respect to the wall end surface 11a. And When the convex portion 42 is viewed from the X direction, the outer peripheral surface 42a of the convex portion 42 along the plate surface direction (X direction) is inclined with respect to the wall end surface 21a, and the inclination angle is θ2.

The inclination angle θ2 of the outer peripheral surface 42a of the convex portion 42 is larger than the inclination angle θ1 of the inner peripheral surface 41a of the concave portion 41. Therefore, as shown in FIG. 3, when the convex portion 42 is fitted in the concave portion 41, a part G of the outer peripheral surface 42 a of the convex portion 42 contacts the inner peripheral surface 41 a of the concave portion 41. Thereby, the first case 10 and the second case 20 are restrained in the plate thickness direction (Y direction) of the wall end surfaces 11a and 21a . On the other hand, since a gap S is formed between the surface 43a on the Z2 side (the upper side in the drawing) of the boss 43 of the first case 10 and the wall end surface 21a of the second case 20, the boss 43 is not restrained. In addition, although the case where the inclination of the recessed part 41 and the convex part 42 was formed in the both sides of a Y direction was illustrated here, it is not restricted to this, The inclination of the recessed part 41 and the convex part 42 is only one side of a Y direction. You may form in.

On the other hand, as shown in FIG. 4, when the concave portion 41 and the convex portion 42 are viewed from the Y direction, the length L1 of the concave portion 41 is the length of the convex portion 42 in the plate surface direction (X direction) of the wall end surface 11a. Longer than L2. The length L1 of the recess 41 in this case is the length of the surface 43a of the boss 43, the length L2 of the protrusion 42 is the length of the wall end surface 21 a. Looking at the recess 41 from the Y-direction, the inner peripheral surface 41b of the recessed portion 41 along the thickness direction (Y-direction) is inclined relative to the wall end face 11a. Looking at the convex portion 42 from the Y-direction, the outer peripheral surface 42b of the convex portion 42 along the thickness direction (Y-direction) is inclined relative to the wall end face 21a. The inclination angle of the outer peripheral surface 42b of the convex portion 42 is also larger Ri by the inclination angle of the inner circumferential surface 41b of the recess 41.

According to this structure, as shown in FIG. 4, the convex portion 42 is fitted in the recess 41, in the plate surface direction, the outer peripheral surface 42b of the convex portion 42, the inner peripheral surface of the recessed portion 41 41b Never touch. Thus, the first case 10 and the second case 20 are not restrained in the plate surface direction (X direction) of the wall end surfaces 11a and 21a .

  As shown in FIG. 1, an outer ridge 14 is formed on the wall end surface 11 a of the first case 10 on substantially the entire circumference other than the boss 43 where the recess 41 is formed. On the wall end surface 21a of the second case 20, an inner ridge portion 24 is formed on substantially the entire circumference other than the boss 43 where the convex portion 42 is formed. When the second case 20 is fixed to the first case 10, the inner ridge 24 is disposed inside the outer ridge 14.

FIG. 5 is a cross-sectional view of the outer ridge 14 and the inner ridge 24 shown in the enlarged view of FIG. 2 taken along the line V-V and viewed from the plate surface direction (X2 direction). As shown in FIG. 5, the outer ridge 14 is a thin portion that stands up in the Z2 direction (upward in the drawing) from the surface 11a of the wall end surface 11a. The outer peripheral surface 14b of the outer ridges 14, an outer peripheral surface 11b flush with the first casing 10. Moreover, as shown in the enlarged view of FIG. 2, the surface 14a on the Z2 side of the outer ridge 14 is flush with the surface 43a on the Z2 side of the boss 43 where the recess 41 is formed, and is continuous. .

As shown in FIG. 5, the inner ridge 24 is a thin portion which is erected wall end surface 21 a or al Z1 direction (in the drawing below). A gap S1 is formed between the inner peripheral surface 14c of the outer ridge 14 and the outer peripheral surface 24c of the inner ridge 24 so as not to contact. Further, when the second case 20 is fixed to the first case 10, the gap S formed by the concave portion 41 and the convex portion 42 shown in FIG. 3 is formed as described above. Therefore, the Z1 direction of the surface of the first case 10 (the surface 14a of the wall end surface 11 a and the outer ridge portion 14), the Z2 direction of the second case 10 surface (wall end surface 21 a and the inner protrusions 24 A gap S2 is also formed between the surface 24a).

  On both side surfaces of the first case 10, a belt mounting portion 13 having a belt through hole 13a through which a fixing belt is passed is formed. Two belt mounting portions 13 are formed on one side surface. By winding the belt around the belt through holes 13a, the electronic device case 1 can be firmly fixed to the vehicle.

The effect of the electronic device case 1 according to the present embodiment having such a configuration will be described. FIG. 6 is an operation explanatory view of the electronic device case 1 according to the embodiment of the present invention, and is a cross-sectional view of the first case 10 and the second case 20 shown in FIG. 2 cut along the VI-VI line. FIG. 6A shows a state before the second case 20 is screwed to the first case 10, and FIG. 6B shows a state after the second case 20 is screwed to the first case 10. Indicates the state.

As shown to Fig.6 (a), the 1st case 10 and the 2nd case 20 are match | combined and screwed so that the convex part 42 of the fitting part 40 may be inserted in the recessed part 41. FIG. Then, as shown in FIG. 6 (b), the convex portion 42 is inserted into the concave portion 41 and is engaged with the concave and convex portions. Thereby, between the wall end surface 11a of the 1st case 10 and the wall end surface 21a of the 2nd case 20, only the recessed part 41 and the convex part 42 of the fitting parts 40 and 40 contact, and a clearance gap exists in other parts. Arise. As described above, according to the present embodiment, the wall end surfaces 11a and 21a of the first case 10 and the second case 20 are locally unevenly fitted in the fitting portions 40 and 40 at locations that are not screwed. Therefore, the contact area between the first case 10 and the second case 20 can be greatly reduced. Thereby, when it fixes to a vehicle etc., the squeak by vibration can be suppressed effectively.

  Further, when the first case 10 and the second case 20 are screwed, the first case 10 and the second case 20 are elastically deformed in a direction approaching each other with the fitting portion 40 as a fulcrum, and the concave portion 41 and the convex portion 42 are pressed against each other by the elastic force at this time. To maintain the contacted state. Therefore, an excessive force is not applied and it is not damaged, and also loosening can be prevented.

In addition, the first case 10 and the second case 20 are restrained in the plate thickness direction (Y direction) of the wall end surfaces 11a and 21a by the concave portions 41 and the convex portions 42. For this reason, even when the belt is wound around the width direction of the electronic device case 1, that is, in the plate thickness direction (Y direction) of the wall end surfaces 11 a and 21 a and fixed to the vehicle, deformation in the plate thickness direction can be effectively suppressed. Since the first case 10 and the second case 20 are not restrained in the plate surface direction (X direction), when the convex portion 42 is inserted into the concave portion 41, the first case 10 and the second case 20 are not brought into contact with the plate surface direction (X direction). , And can be brought into contact with the plate thickness direction (Y direction).

  In the present embodiment, as shown in FIG. 5, a gap S <b> 1 is formed between the inner peripheral surface 14 c of the outer ridge 14 and the outer peripheral surface 24 c of the inner ridge 24 so as not to contact. . For this reason, if the screw 2 is strongly tightened when screwed, the inner ridge 24 of the second case 20 may be spread outward and deformed at the four corners P that are the screwing points. is there. Therefore, for example, as shown in FIG. 1, protrusions 15 for suppressing deformation of the second case 20 may be provided in the first case 10 in the vicinity of the four corner portions P.

FIG. 7 is a plan view of the first case 10 shown in FIG. 1 as viewed from the second case 20 side (Z1 direction), and shows the position of the protrusion 15 disposed on the first case 10 surrounded by a broken line. It is. FIG. 8 is a cross-sectional view of the projection 15 in the partially enlarged view shown in FIG. 7 taken along line VIII-VIII and viewed from the plate surface direction. In the partially enlarged view of FIG. 7 and FIG. 8, the inner ridge 24 is also indicated by a one-dot chain line.

  As shown in FIG. 7, the first case 10 is formed with one protrusion 15 in each of the X and Y directions of the four corner portions P to be screwed. As shown in the enlarged view of FIG. 7 and FIG. 8, the protrusion 15 protrudes on the inner peripheral surface 14 c of the outer protrusion 14 so as to be pointed from the inner peripheral surface 14 c toward the inner protrusion 24. The protrusion 15 is continuous from the surface 11a of the wall end surface 11a to the surface 14a of the outer ridge 14. The protrusion 15 is configured integrally with the first case 10. However, the protrusion 15 may be configured separately from the first case 10.

  In the portion where the projection 15 is disposed, the gap S1 between the inner peripheral surface 14c of the outer ridge 14 and the outer peripheral surface 24c of the inner ridge 24 shown in FIG. Even if the tightening of the screw 2 is strong, the deformation of the second case 20 can be suppressed at the four corners P which are screwing points.

  Here, the case where the protrusion 15 is formed on the inner peripheral surface 14c of the outer ridge portion 14 of the first case 10 is illustrated, but the present invention is not limited to this, and the protrusion 15 is connected to the inner side of the second case 20. You may form in the outer peripheral surface 24c of the protrusion part 24. FIG.

  Moreover, in the said embodiment, although the case where the fitting parts 40 and 40 were arrange | positioned near the center of two sides extended in a X direction was illustrated, it is not restricted to this. The fitting portions 40, 40 may be provided in a portion other than the center of the two sides extending in the X direction, or two or more may be provided on each side. Furthermore, you may make it arrange | position the fitting parts 40 and 40 to two sides extended in a Y direction. Moreover, in the said embodiment, although the case where the screwing location was provided in the four corner parts P was illustrated, it is not restricted to this. For example, the screwing location may be formed near the center of all sides in the X and Y directions. In this case, the fitting portion 40 may be arranged at the four corner portions P.

DESCRIPTION OF SYMBOLS 1 Electronic device case 2 Screw 10 1st case 11 Opposing edge part 11a Surface 11b Outer peripheral surface 12 Boss 12a Through hole 13 Belt mounting part 13a Belt through hole 14 Outer protrusion 14a Surface 14b Outer peripheral surface 14c Inner peripheral surface 15 Protrusion 20 First 2 cases 21 Opposing edge 21a Surface 22 Boss 22a Through hole 24 Inner ridge 24a Surface 24c Outer peripheral surface 25 Notch 40 Fitting portion 41 Recess 41a Inner peripheral surface 42 Convex portion 42a Outer peripheral surface 43 Boss 43a Surface

Claims (8)

In the electronic device case in which the first case and the second case are combined and fixed by a plurality of screwing portions,
On the side wall portion of the second case, a convex portion protruding toward the first case from a wall end surface facing the first case is locally formed at a position away from the screwing portion,
A concave portion facing the convex portion is formed in the side wall portion of the first case, and the concave portion is directed from the surface of the side wall portion of the first case facing the second case toward the inside of the side wall portion. Formed,
The convex portion has two outer peripheral surfaces facing each other in the plate thickness direction of the side wall portion of the second case, and the two outer peripheral surfaces are in a direction in which they approach each other as they go to the first case. Tilt,
The concave portion has two inner peripheral surfaces facing each other in the thickness direction of the side wall portion of the first case, and the two inner peripheral surfaces are both separated from each other toward the second case. Tilt,
The inner angle formed by the two opposed inner peripheral surfaces is larger than the inner angle formed by the two opposed outer peripheral surfaces,
The convex part and the concave part are concavo-convexly fitted to form a fitting part, and in the fitting part, the convex part is in contact with each of the two inner peripheral surfaces of the concave part, The electronic device case , wherein the convex portion is constrained in the thickness direction of the side wall portions of the first case and the second case.   2. The electronic device case according to claim 1, wherein, in the fitting portion, the convex portion is not restrained in the circumferential direction in which the side wall portion extends in the concave portion.   In a portion where the fitting portion is not formed, a gap S2 in the combination direction of the two cases is formed between the side wall portion of the first case and the side wall portion of the second case. Item 3. The electronic device case according to Item 1 or 2.   The electronic device case according to claim 3, wherein at least one of the first case and the second case is elastically deformed in a direction approaching the other with the fitting portion as a fulcrum when screwed.   An inner ridge portion is formed on one of the side wall portion of the first case and the side wall portion of the second case, and an outer ridge portion facing the outside of the inner ridge portion is formed on the other side. 5. The electronic device case according to claim 1, wherein a gap S <b> 1 is formed between the inner ridge portion and the outer ridge portion in a state where the portion and the concave portion are fitted. .   The electronic device case according to claim 5, wherein a protrusion that fills the gap is formed on at least one of the inner protrusion and the outer protrusion at a location close to the screwing portion.   The electronic device case according to claim 1, wherein the fitting portion is formed at an intermediate portion between the screwing portion and the screwing portion. Each of the side wall portion of the first case and the side wall portion of the second case is provided with a wall end surface facing each other in the fitting portion, and the wall end surface of the first case and the second case electronic device case according to any one of the to wall end surface and the claims 1 face each other through the clearance S 7 of.

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