JP7159604B2 - Electronic device housing and unlocking jig - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing and an unlocking jig for an electronic device such as a communication device fixed to an installation surface such as an indoor or outdoor wall.

Communication devices fixed to installation surfaces are becoming smaller and more power-saving, and battery-driven systems are becoming the mainstream. Such communication equipment requires access to the internal circuit board assembly for periodic battery replacement. When work such as battery replacement occurs in communication equipment that is directly fixed to the installation surface such as a wall surface, the operator loosens the screw on the lid of the communication equipment and opens it to perform the replacement work, and screw the lid after the work is completed. Workability is poor because work is required. Also, in order to prevent the snap-fit type engagement piece of the upper case, which is a lid, from being damaged, there has been proposed a joint structure in which the engagement piece of the upper case is provided with a guide piece rib (Patent Document 1).

Japanese Patent Application Laid-Open No. 2000-223850

However, in the prior art, the housing can be easily unlocked by inserting a flat plate of a general tool or the tip of a flat-blade screwdriver into the through-hole of the upper case without a special jig for opening the upper case. Therefore, there is a problem in crime prevention that there is a possibility that a person other than a construction worker can open the housing by using a general tool.

The present invention has been devised in view of the above-described conventional problems, and is intended to improve the workability of maintenance workers while ensuring crime prevention in installed electronic equipment that requires opening and closing of the housing for periodic maintenance. An object of the present invention is to provide an electronic device housing and an unlocking jig that improve

The electronic device housing of the present invention includes a base portion and a lid portion which each have an opening and are joined to each other through the opening to define a storage space therein;
a locking part that spans the outer surfaces of the base part and the lid part and closes the opening,
The base has a bottom fixed to the installation surface on the side facing the opening,
The locking portion is fixed to the outer surface of the lid portion, extends toward the bottom portion along the outer surface of the base portion, and is detachable from a locking portion provided on the outer surface of the base portion. has a locking piece that engages with
The locking piece has a limiting end defining an access limiting gap between the locking piece and the mounting surface for limiting access between the locking piece and the outer surface of the base.

The unlocking jig of the present invention is an unlocking jig for unlocking the locking portion of the electronic device housing,
a rigid extension portion having at one end a fitting end portion detachably fitted to the limiting end portion and extending beyond the locking portion along the locking piece; and provided at the other end of the rigid extension portion. and a pressed pressing end.

According to the present invention, the limiting end of the locking piece defines an access limiting gap between the locking piece and the outer surface of the base portion to limit access between the locking piece and the outer surface of the base portion, It is possible to improve the workability of maintenance workers while ensuring crime prevention in installed electronic equipment.

1 is a perspective view showing the appearance of an electronic device that is Embodiment 1 according to the present invention, viewed from the lid portion side; FIG. FIG. 2 is a schematic exploded perspective view showing an electronic device housing and an unlocking jig of Example 1; 2 is a schematic cross-sectional view of the electronic device taken along line xx in FIG. 1; FIG. 4 is a schematic cross-sectional view enlarging a portion of the electronic device of Example 1 (broken line portion in FIG. 3); FIG. FIG. 4 is an enlarged schematic cross-sectional view showing a portion of the electronic device of Example 1 (broken line portion in FIG. 3 ) and an unlocking jig; 2 is a perspective view showing the appearance of the electronic device and the unlocking jig of Example 1, viewed from the lid side. FIG. 4 is a schematic side view showing the operation of the electronic device and the unlocking jig of Example 1. FIG. FIG. 5 is a perspective view showing the appearance of an electronic device that is Embodiment 2 according to the present invention, viewed from the lid side. FIG. 11 is an enlarged schematic cross-sectional view showing a part of the electronic device and the unlocking jig of Example 2; FIG. 11 is an enlarged schematic cross-sectional view showing part of an electronic device and an unlocking jig in a modification of Example 2; FIG. 10 is a perspective view showing the appearance of an electronic device that is Embodiment 3 according to the present invention, viewed from the lid side. FIG. 12 is an enlarged schematic cross-sectional view (part of the cross section of the plane including the xx line in FIG. 11) showing part of the electronic device and the unlocking jig of Example 3; FIG. 11 is a perspective view showing the appearance of an electronic device that is Embodiment 4 according to the present invention, viewed from the lid side. FIG. 14 is an enlarged schematic cross-sectional view (part of the cross section of the plane including the xx line in FIG. 13) showing part of the electronic device and the unlocking jig of Example 4; FIG. 11 is a perspective view showing the appearance of an electronic device that is Embodiment 5 according to the present invention, viewed from the lid side. FIG. 12 is an enlarged schematic side view showing a part of the electronic device and the unlocking jig of Example 5; FIG. 11 is a perspective view showing the appearance of an electronic device that is Embodiment 6 according to the present invention, viewed from the lid side. FIG. 18 is an enlarged schematic cross-sectional view (part of the cross section of the plane including the xx line in FIG. 17) showing part of the electronic device and the unlocking jig of Example 6; 7 is a schematic cross-sectional view showing an electronic device that is Embodiment 7 of the present invention; FIG. FIG. 11 is a schematic side view showing an electronic device and an unlocking jig of Example 7;

Hereinafter, with reference to the drawings, a housing for an electronic device according to an embodiment of the present invention will be described by taking a communication device as an example. In addition, the present invention is not limited to the following examples. Further, in the embodiments, constituent elements having substantially the same functions and configurations are denoted by the same reference numerals, thereby omitting redundant description.

(Description of configuration)
FIG. 1 is a perspective view showing the appearance of a housing 10 of a communication device according to the first embodiment, viewed from the lid side. FIG. 2 is a schematic exploded perspective view showing the housing 10 and the unlocking jig 20. As shown in FIG. FIG. 3 is a cross-sectional view of the plane including xx line in FIG. 1 showing the housing 10. As shown in FIG.

As shown in FIG. 1, the housing 10 has a substantially rectangular parallelepiped shape. The housing 10 is composed of a base portion 11 and a lid portion 12 that are fitted together.

A pair of locking portions 13 bridging between a pair of opposing portions of the outer side surfaces 11G and 12G of the base portion 11 and the lid portion 12 is provided. Inside the housing 10, a circuit board assembly 14 including electronic components or electronic devices is accommodated, as shown in FIG. A pair of screwing protrusions 11GP projecting from the opposite side surfaces of the remaining outer side surface 11G of the portion of the base portion 11 where the locking portion 13 is located is provided. The base portion 11 of the housing 10 is fixed to the installation surface T by fastening the screw projection 11GP to the installation surface T with screws Sc.

The locking portions 13 on both sides of the lid portion 12 in the short direction have lock pieces 13A extending from the lid portion 12 as connecting members for connecting the lid portion 12 and the base portion 11 . A concave portion 13D (through hole) is formed in the lock piece 13A so that the convex portion 11M near the opening of the base portion 11 is fitted.

Thermoplastic synthetic resin called general-purpose plastic is used as the material of the base portion 11 and the lid portion 12 of the housing 10 . General-purpose plastics include polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polystyrene (PS), polyurethane (PUR), acrylonitrile-butadiene-styrene resin (ABS), and acrylonitrile-styrene resin. (AS), acrylic resin (PMMA), polycarbonate (PC) and the like. Engineering plastics can also be used for the housing 10 . Also, the base portion 11 and the lid portion 12 may be formed using a metal material, or may be formed using an insert molding method for integrating metal and resin.

As shown in FIG. 2, the base portion 11 has a bottom portion 11S (screwed protrusions 11GP) fixed to the installation surface T on the side facing the opening portion 11K, and four peripheral walls erected from the bottom portion 11S. It has a substantially rectangular tubular box shape in plan view with an outer side surface 11G. The lid portion 12 also has a tubular box shape that is substantially rectangular in plan view and has outer surfaces 12G of four peripheral walls erected from the top surface of the lid portion 12 . Note that the housing 10 is not limited to a substantially rectangular parallelepiped shape, and may have a cylinder box shape of a cylinder or prism.

As shown in FIG. 2, the openings 11K and 12K of the base portion 11 and the lid portion 12 are provided with complementary shaped stepped opening portions ST that can be fitted to each other. By fitting or joining the open stepped portions ST to each other, as shown in FIG. A housing space SP is demarcated. Also, a sealing material (not shown) such as an O-ring may be interposed between the opening step portion ST of the base portion 11 and the lid portion 12 . By providing the sealing material, it is possible to improve the moisture resistance of the circuit board assembly 14 housed in the housing 10 .

As shown in FIGS. 1 to 4, each locking piece 13A of the locking portion 13 is fixed to the outer surface 12G of the lid portion 12 and extends along the outer surface 11G of the base portion 11 toward the bottom portion 11S. It is formed integrally with the portion 12 . The locking portion 13 also includes a convex portion 11M which is a locking portion provided on the outer side surface 11G of the base portion 11 . Each convex portion 11M of the base portion 11 is formed integrally with the outer side surface 11G, and the locking piece 13A is configured to be detachably engaged with the convex portion 11M.

More specifically, as shown in FIG. 4, the locking piece 13A is provided with a limiting end portion 13R on the tip side thereof, and when facing downward, the limiting end portion 13R is the lowest end. Limiting edge 13R is an edge extending along outer surface 11G having a rectangular cross-section. The locking piece 13A has an extending portion 13C that protrudes outward between the base end 13B of the lid portion 12 and the limiting end portion 13R. It is designed to That is, in this embodiment, the convex portion 11M is formed to have a triangular cross-sectional shape with the tip facing downward, and the lower surface of the convex portion 11M and the upper surface of the concave portion 13D are latched. As a result, the concave portion 13D is detachably engaged with and connected to the convex portion 11M projecting outward from the outer side surface 11G of the base portion 11. As shown in FIG.

The limiting end portion 13R of the locking piece 13A defines an access limiting gap ARC with the installation surface T between the locking piece 13A and the outer surface 11G of the base portion 11 . The access restriction gap ARC is a space that restricts the access of a person's finger, screwdriver, etc. between the lock piece 13A and the outer surface 11G, and the height of the lowest end of the restriction end 13R from the installation surface T is, for example, 1 mm to 6 mm. It is a gap of degree. In this embodiment, the restricting end 13R prevents a person's finger from entering the gap between the restricting end 13R of the locking piece 13A and the equipment installation surface T in the installed state. A space into which the tip of the fitting end 20F of the unlocking jig 20 is inserted is provided between the limiting end 13R of the locking piece 13A and the outer surface 11G.

In this embodiment, when the communication device is installed, the lock piece 13A cannot be unlocked by a person's finger or the like, and the lock piece 13A cannot be unlocked unless the fixing wood screw Sc is removed. That is, if the fixing wood screw Sc is removed every time maintenance is performed, the wall surface will be full of holes, which is not practical. unlock the

As shown in FIG. 5, the unlocking jig 20 for unlocking the lock piece 13A of the lock portion 13 of the electronic device housing consists of a substantially plate-like rigid extension portion 20LM, one end of which is attached to the limit end portion 13R of the lock piece 13A. It has a fitting end portion 20F that is detachably fitted. Further, the unlocking jig 20 has a substantially U-shaped protrusion 20D on the inner surface of the rigid extending portion 20LM. The fitting end portion 20F is a groove portion having a shape complementary to the restricting end portion 13R of the locking piece 13A. The rigid extension portion 20LM contacts along the lock piece 13A and extends beyond the convex portion 11M (the outer surface 11G of the base portion 11), and has a pressing end portion 20PH provided at the other end. The pressing end portion 20PH is provided with a linear concave/convex portion as a finger contact portion in parallel with the groove portion. The projecting portion 20D is configured to come into contact with the edge of the recessed portion 13D when the locking piece 13A is removed from the projecting portion 11M of the base portion 11. As shown in FIG.

(Description of operation)
First, as shown in FIG. 1, the housing 10 that houses the circuit board assembly 14 is fixed to the installation surface T by fastening the screw-fastening protrusions 11GP of the base portion 11 to the installation surface T with screws Sc. be.

Next, when opening the lid portion 12 for maintenance or the like, the fitting ends 20F of the unlocking jig 20 are moved to the limiting ends of the lock pieces 13A on both sides of the housing as indicated by white arrows BA shown in FIG. It is hooked and pinched so as to slip into the portion 13R (Fig. 7(A)). Then, as shown by the arrows in FIG. 7B, by pushing the pressing ends 20PH of the two unlocking jigs 20 toward the communication device, the projection 20D comes into contact with the edge of the recess 13D and is locked by the principle of leverage. The lock pieces 13A can be removed from the projections 11M of the base portion 11 by elastically deforming the pieces 13A outward. Thereby, the lid portion 12 can be removed from the base portion 11 . As described above, in this embodiment, since it is necessary to expand the lock pieces 13A on both sides outward at the same time, the unlocking of the lock pieces 13A cannot be performed without the special unlocking jig 20. FIG.

Next, when closing the lid portion 12 after the work, by pressing the lid portion 12 downward against the base portion 11 so as to align the openings of each other, the locking piece 13A and the convex portion 11M of the base portion 11 are locked. By fitting them together, they can be fixed together.

As described above, according to the present embodiment, screws are not required for fitting the lid portion 12 and the base portion 11 made of resin. Therefore, it is not necessary to increase the size of the communication device, and the cost can be reduced. Furthermore, since only the lock piece 13A of the lid portion 12 and the convex portion 11M of the base portion 11 are engaged with each other, the lock can be easily released by the unlocking jig 20, which improves the workability of the construction worker. do. Further, when the communication device is installed, it can be set so that there is no gap between the limit end portion 13R of the lock piece 13A of the lid portion 12 and the device installation surface T so that a finger can be inserted. Since the unlocking jig 20 is essential, security can be ensured.

(Description of configuration)
In this embodiment, in addition to the pair of locking pieces 13A provided on the opposing side walls of the base portion 11 of the first embodiment, as shown in FIGS. The configuration is the same as that of the first embodiment, except that a projecting portion PT projecting from the outer surface 11G is provided between the installation surface T and the installation surface T. FIG.

(Description of operation)
According to this embodiment, the same effect as in Embodiment 1 can be obtained, and the access limiting gap ARC between the limiting end portion 13R of the locking piece 13A and the installation surface T can be further narrowed. is obtained.

Furthermore, as shown in FIG. 10, the projecting portion PT can be provided as part of a separate plate material PP projecting from the outer side surface 11G interposed between the installation surface T and the outside surface 11G. For example, the base portion 11 may be configured such that the plate member PP is fixed to the curved installation surface T such as a telegraph pole by means of a mounting bracket 17 fastened by screws Sc or the like. In this case, the plate material PP and the mounting bracket 17 are fixed to the curved installation surface T in advance. According to this modification, the degree of freedom of the installation location of the device is increased.

(Description of configuration)
In this embodiment, instead of the pair of screwing projections 11GP provided on the opposing side walls of the base portion 11 of the first embodiment, as shown in FIGS. 13R and the mounting surface T, except that a projecting portion PT projecting from the outer surface 11G is provided between the mounting surface T and the bottom portion 11S is fixed to the mounting surface T via a screw Sc penetrating the projecting portion PT. Identical to 1.

(Description of operation)
According to this embodiment, the same effect as in Embodiment 1 can be obtained, and the access limiting gap ARC between the limiting end portion 13R of the locking piece 13A and the installation surface T can be further narrowed. Since the whole device cannot be removed unless it is released, the crime prevention effect can be further enhanced.

(Description of configuration)
13 and 14, instead of the pair of screw-fastening projections 11GP provided on the opposing side walls of the base portion 11 of the first embodiment, the base portion 11 of the present embodiment has a storage space SP. The configuration is the same as that of the first embodiment except that the bottom portion 11S is fixed to the installation surface T via a screw penetrating through the bottom portion 11S.

(Description of operation)
According to this embodiment, the same effect as in Embodiment 1 can be obtained, and since the whole device cannot be removed unless the lock piece 13A is released and the cover portion 12 is removed, the crime prevention effect can be enhanced. be done.

(Description of configuration)
In this embodiment, as shown in FIGS. 15 and 16, access between the lock piece 13A and the outer surface 11G of the base portion 11 is restricted at the outer surface 11G of the base portion 11 on which the lock piece 13A is provided. , the configuration is the same as that of the first embodiment, except that an extension projecting portion PT2 that projects and extends along the locking piece 13A is provided.

(Description of operation)
According to this embodiment, the same effect as in the first embodiment can be obtained, the lock piece 13A can be easily guided to the outer surface 11G (projection 11M) of the base portion 11, and the lock piece 13A and the base can be easily guided. Since the gap with the portion 11 (outer surface 11G) is partially closed, it is possible to prevent a driver from entering from the side, thereby enhancing the crime prevention effect.

(Description of configuration)
17 and 18, instead of the convex portion 11M of the engaging portion of the base portion 11 and the concave portion 13D fitted to the convex portion 11M of the lock piece 13A of the first embodiment, the present embodiment has a base The configuration is the same as that of the first embodiment except that the engaging portion of the portion 11 is the concave portion 11D, and the locking piece 13A is provided with the convex portion 13M that fits into the concave portion 11D. The same effects as those of the first embodiment can also be obtained by the present embodiment. Further, since a plurality of protrusions 13M can be provided on the surface of the lock piece 13A facing the base portion 11, and no through hole is provided in the lock piece 13A, an effect of enhancing the crime prevention effect can be obtained.

(Description of configuration and operation)
As shown in FIG. 3 of Embodiment 1, in this embodiment, at least a pair of locking portions 13 are arranged so as to face each other across the storage space SP. Alternatively, as shown in FIGS. 19 and 20, at the other end of the outer surface 11G2 corresponding to one end of the outer surface 11G provided with one locking portion 13, a hinge connecting the base portion 11 and the lid portion 12 The configuration is the same as that of the first embodiment except that the mechanism HG is provided. The same effects as those of the first embodiment can also be obtained by the present embodiment.

Although not shown in the above embodiment, a part of the peripheral wall of the base portion 11 is provided with a wiring for passing wiring such as an external power supply cable and an input/output cable for driving the housed circuit board assembly 14. A connection hole may be provided.

Further, any of the above embodiments may be combined with each other as appropriate.

10... Housing 11... Base portion 11
11M... Protruding part 11S... Bottom part 11GP... Screwing protrusion part 12... Lid part 13... Locking part 13A... Locking piece 13D... Recessed part 13R... Limiting end part 14... Circuit board assembly 20... Unlocking jig ARC... Access limiting gap T... Installation surface Sc...Screw SP...Accommodating space PT...Protruding part PT2...Extension protruding part

Claims (10)

a base portion and a lid portion each having an opening and joined to each other through the opening to define a storage space therein;
a locking part that spans the outer surfaces of the base part and the lid part and closes the opening,
The base has a bottom fixed to the installation surface on the side facing the opening,
The locking portion is fixed to the outer surface of the lid portion, extends toward the bottom portion along the outer surface of the base portion, and is detachable from a locking portion provided on the outer surface of the base portion. has a locking piece that engages with
The locking piece has a limiting end that defines a gap with the installation surface, and the limiting end limits access from the gap to between the locking piece and the outer surface of the base. formed so as to
The base portion has a projecting portion projecting from the outer surface between the limiting end portion of the locking piece and the installation surface.
An electronic device housing characterized by: a base portion and a lid portion each having an opening and joined to each other through the opening to define a storage space therein;
a locking part that spans the outer surfaces of the base part and the lid part and closes the opening,
The base has a bottom fixed to the installation surface on the side facing the opening,
The locking portion is fixed to the outer surface of the lid portion, extends toward the bottom portion along the outer surface of the base portion, and is detachable from a locking portion provided on the outer surface of the base portion. has a locking piece that engages with
The locking piece has a limiting end that defines a gap with the installation surface, and the limiting end limits access from the gap to between the locking piece and the outer surface of the base. formed so as to
An extension projecting portion is provided on the outer surface of the base portion on which the locking piece is provided and extends along the locking piece to limit access between the locking piece and the outer surface of the base portion. An electronic device housing characterized by being a base portion and a lid portion each having an opening and joined to each other through the opening to define a storage space therein;
a locking part that spans the outer surfaces of the base part and the lid part and closes the opening,
The base has a bottom fixed to the installation surface on the side facing the opening,
The locking portion is fixed to the outer surface of the lid portion, extends toward the bottom portion along the outer surface of the base portion, and is detachable from a locking portion provided on the outer surface of the base portion. has a locking piece that engages with
The locking piece has a limiting end that defines a gap with the installation surface, and the limiting end limits access from the gap to between the locking piece and the outer surface of the base. formed so as to
the locking portion of the base portion includes a recess,
An electronic device housing, wherein the locking piece has a convex portion that fits into the concave portion of the locking portion . a base portion and a lid portion each having an opening and joined to each other through the opening to define a storage space therein;
a locking part that spans the outer surfaces of the base part and the lid part and closes the opening,
The base has a bottom fixed to the installation surface on the side facing the opening,
The locking portion is fixed to the outer surface of the lid portion, extends toward the bottom portion along the outer surface of the base portion, and is detachable from a locking portion provided on the outer surface of the base portion. has a locking piece that engages with
The locking piece has a limiting end that defines a gap with the installation surface, and the limiting end limits access from the gap to between the locking piece and the outer surface of the base. formed so as to
At least a pair of the locking portions are arranged so as to face each other with the storage space interposed therebetween. In the electronic device housing according to claim 1 ,
The electronic device housing, wherein the base portion is fixed to the installation surface at the bottom portion via a screw penetrating the protruding portion. In the electronic device housing according to claim 1 ,
The electronic device housing, wherein the protruding portion is provided as part of a separate plate material protruding from the outer side surface interposed between the mounting surface and the mounting surface. In the electronic device housing according to any one of claims 1 and 3 to 6 ,
An extension projecting portion is provided on the outer surface of the base portion on which the locking piece is provided and extends along the locking piece to limit access between the locking piece and the outer surface of the base portion. An electronic device housing characterized by being In the electronic device housing according to any one of claims 1, 2 and 4 to 6 ,
the locking portion of the base portion includes a recess,
The electronic device housing, wherein the locking piece has a convex portion that fits into the concave portion of the locking portion . In the electronic device housing according to any one of claims 1 to 3 and 5 to 6 ,
At least a pair of the locking portions are arranged so as to face each other with the storage space interposed therebetween. An unlocking jig for unlocking the locking portion of the electronic device housing according to any one of claims 1 to 9,
a rigid extension portion having at one end a fitting end portion detachably fitted to the limiting end portion and extending beyond the locking portion along the locking piece; and provided at the other end of the rigid extension portion. an unlocking jig, comprising: a pressed push end;

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