JP7158294B2 - Case - Google Patents

Description

TECHNICAL FIELD The present invention relates to a case attached to an object to be worn by an attachment.

Due to the recent progress in IoT (Internet Of Things) technology, electronic devices that are attached to livestock mainly in outdoor farms and are operated 24 hours a day have appeared. The basic components of this electronic device are an electronic circuit, a case containing it, and a belt (equipment) for attaching the case to livestock. The case must not open easily when attached to a livestock (attachment). This is to protect the electronic circuit from water. In addition, the case must be disassembleable so that the battery that drives the electronic circuit can be replaced.

A conventional case has a structure in which two shells (housings) constituting the case are firmly fastened with screws. Therefore, when a screw is dropped outdoors, it is difficult to recover the screw. In addition, there is a risk that the screws that fasten the case will rust and become fixed, or that the rust will expand, resulting in a decrease in waterproofness. Furthermore, there is a risk that dirt and excrement will enter and adhere to the screw hole and the screw itself, making it impossible to hang the tool.

Therefore, it is conceivable to construct a case by fitting two shells by a hook mechanism instead of screws. Patent Literature 1 describes an invention relating to a hook having a mechanism in which a hook can be hooked with a small force when engaging a part and is difficult to come off after engaging. In order to realize this, the mechanism for preventing disengagement of the engaging claw described in Patent Document 1 has a deformable first hook, and is formed of resin having a function of engaging parts with each other by the hook. The part has a second hook which is located in the deformation space of the first hook and is deformable in a direction substantially perpendicular to the deformation direction of the first hook.

JP 2006-210593 A

In the invention described in Patent Document 1, when the second hook receives external pressure and is damaged, the first hook may receive external pressure toward the second hook and disengage. Further, if mud, feces, etc. enter between the first hook and the second hook and are fixed, there is a possibility that the engagement cannot be released.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a case in which the fitting of the shell is not easily released when the case is attached to the object, and the fitting of the shell can be easily released when the case is removed from the object. do.

The case of the present invention includes a first shell having a hook with an overhanging claw, a first hole adjacent to the base of the hook, and a hook receiving portion that engages with the hook. A case constructed by fitting a second shell having two holes therein, wherein the first shell and the second shell are fitted to form the first hole and the second hole. They are connected to form a through hole through which the fitting is passed.

According to the present invention, when the case is attached to the object, the shell is not easily disengaged, and when the case is removed from the object, the case can be easily disengaged.

It is a perspective view showing a case in the first embodiment. FIG. 4 shows the first shell of the case; FIG. 4 shows a second shell of the case; It is a figure explaining fitting of a 1st shell and a 2nd shell. FIG. 4 is a cross-sectional view showing a case through which a belt is passed; FIG. 4 is a diagram showing a state in which a belt is passed through the neck of a cow and locked to the side of the neck. It is a front view which shows the case in 2nd Embodiment. It is a front view which shows the case in 3rd Embodiment. It is a sectional view showing a case in a 4th embodiment. It is a sectional view showing a case in a 5th embodiment. FIG. 20 is a right side view showing the first shell and the second shell of the case according to the sixth embodiment; Fig. 10 is a right side view showing a state in which the first shell and the second shell are correctly fitted; Fig. 10 is a right side view showing a state in which the first shell and the second shell are not correctly fitted; FIG. 11 is a cross-sectional view showing a case in a seventh embodiment;

EMBODIMENT OF THE INVENTION Henceforth, the form for implementing this invention is demonstrated in detail with reference to each figure.
In the case of this embodiment, a belt that is always used when using the case is used as a bar for the fitting portion of the case. As a result, the two shells forming the case are not easily disengaged when attached to the object, but can be easily disengaged when removed from the object.
For the sake of convenience, XYZ coordinate axes are written in each drawing, and the arrangement and movement of each part are explained based on these XYZ axes.

FIG. 1 is a perspective view showing a belt-equipped case according to the first embodiment.
As shown in FIG. 1, a case 1 has a hollow structure like monaka skin of Japanese confectionery or bivalve shell, and is constructed by fitting shells 2 and 3 together. The outer shape of the case 1 is a substantially rectangular parallelepiped with rounded ridges and vertices. The case 1 is the longest in the horizontal direction and the shortest in the height direction, and has a rectangular parallelepiped hollow portion inside.
These shells 2 and 3 are made of a material having predetermined elasticity and rigidity, such as resin.

An electronic device (not shown) for monitoring the behavior of livestock and a battery for driving the electronic device are housed in a hollow portion formed inside the case 1 . The electronic device includes, for example, a GPS (Global Positioning System) device for measuring the position of livestock, an acceleration sensor and an angular acceleration sensor for detecting the movement of livestock, and the like.

Since the case 1 keeps the hollow portion waterproof by means of a rubber O-ring 8 (see FIG. 5 described later), the case 1 can accommodate electronic devices, batteries, and the like. In FIG. 1, shell 2 is located on the front side of FIG. 1, and shell 3 is located on the back side of FIG.

Holes 22 and 24 penetrating vertically are formed at both longitudinal ends of the shell 2 sandwiching the hollow portion. The belt 4 passes through these holes 22 and 24 . A protrusion 29 is formed in the outer center of the shell 2 . The case 1 is locked at a predetermined position on the belt 4 by fitting the projection 29 into one of the plurality of belt holes 44a to 44e. The hole 22 and the hole 24 are formed at two locations facing each other with the hollow portion of the case 1 interposed therebetween.

A buckle 41 and a belt loop 43 are attached to one end of the belt 4 , and a ring 42 is passed between the buckle 41 and the belt loop 43 . The other end of the belt 4 is obliquely cut, and five belt holes 44a to 44e are punched at predetermined intervals.

First, the other end of the belt 4 is passed through the hole 24 from the bottom surface of the case 1, then passed through the hole 22 from the top surface of the case 1, and the projection 29 is fitted into the belt hole 44d. Further, a ballast 7 (see FIG. 6 described later) is passed through and fixed to the belt 4 . In this state, the belt 4 is wrapped around the neck of the livestock. The other end of the belt 4 is passed through the buckle 41 , one of the belt holes 44 a to 44 e is hooked on the buckle 41 , and the other end of the belt 4 is passed through the belt loop 43 . As a result, the belt 4 and the case 1 are attached to the livestock. That is, the belt 4 functions as an attachment for attaching the case 1 to livestock or the like. It should be noted that the attachment of the case 1 to livestock or the like is not limited to the belt 4, and any belt-like or string-like attachment may be used.
Hereinafter, the structure of each part of the case 1 of FIG. 1 will be described with reference to FIGS. 2 to 5. FIG.

FIG. 2 shows the shell 2 of the case 1. FIG.
The shell 2 has a protrusion 29 formed in the center of the +Y side surface (upper surface). The shell 2 has a hook 21 in the -Y direction (downward) at the -X end (left end) of the -Y side (bottom surface), and a hook 21 in the -Y direction (downward) at the +X end (right end). 23 are formed. Hooks 21 and 23 each have a claw portion projecting to the outside of case 1 . At the base of the hook 21, a hole 22 adjacent to the hook 21 penetrates the shell 2 in the ±Y direction (vertical direction). At the base of the hook 23, a hole 24 adjacent to the hook 23 penetrates the shell 2 in the ±Y direction (vertical direction). That is, a hook 21 and a hole 22 (first hole) adjacent to the root of the hook 21 are formed at the left end of the shell 2 (first shell). A hook 23 and a hole 24 (first hole) adjacent to the base of the hook 23 are formed at the right end of the shell 2 (first shell).

The shell 2 (first shell) has a waterproof wall 26 formed on the -Y side (lower surface). By sandwiching an O-ring 8 (see FIG. 5) between the waterproof wall 26 and the waterproof wall 36 (see FIG. 3) of the shell 3, a waterproof hollow portion is formed inside the case 1. As shown in FIG.

FIG. 3 shows the shell 3 of the case 1. FIG.
The shell 3 (second shell) of the case 1 has a hole 32 (second hole) that penetrates the shell 3 at the -X end (left end) and a hole that penetrates the shell 3 at the +X end (right end). 34 (second hole) is formed.
A hook receiving portion 31 that engages with the hook 21 of FIG. 2 is formed inside the hole 32 . A hook receiving portion 33 that engages with the hook 23 of FIG. 2 is formed inside the hole 34 .

This hole 32 continues to the hole 22 (first hole) in a state in which the shells 3 and 2 are fitted together, so that the belt 4 shown in FIG. 1 can pass therethrough. That is, the holes 22 and 32 form through holes through which the belt 4 is passed.

Similarly, the hole 34 continues to the hole 24 (first hole) in a state where the shell 3 is fitted with the shell 2 so that the belt 4 of FIG. 1 can pass therethrough. That is, the holes 24 and 34 form through holes through which the belt 4 is passed.
A waterproof wall 36 is formed on the shell 3 (second shell). An O-ring 8 (see FIG. 5) is fitted to the waterproof wall 36, and further a waterproof wall 26 (see FIG. 2) of the shell 2 (first shell) is fitted to form a waterproof hollow portion inside. It is formed.

4A and 4B are diagrams for explaining the fitting between the shell 2 and the shell 3. FIG.
Case 1 is formed by fitting shells 2 and 3 together, and a waterproof hollow portion is formed therein.
The hook 21 is inserted into the hole 32 and engaged with the hook receiving portion 31 . The hook 23 is also inserted into the hole 34 and engaged with the hook receiving portion 33 . This allows the shell 2 to fit into the shell 3 .

The shell 2 excluding the hooks 21 and 23 and the shell 3 excluding the hook receiving portions 31 and 33 are symmetrical with respect to the fitting surface. As a result, the case 1 is less likely to break even when an external force is applied in the vertical or horizontal direction, so that the waterproofness of the hollow portion can be maintained.

FIG. 5 is a sectional view showing the case 1 through which the belt 4 is passed.
The case 1 is constructed by fitting a shell 3 to a shell 2, and a belt 4 is passed through the case 1 to be attached to an object such as a cow 5 (see FIG. 6). An object to be worn such as a cow 5 is in contact with the -Y side (lower side) of the case 1 . As a result, the electronic device inside the case 1 can sense the activity of the cow 5 or the like using an acceleration sensor or an angular acceleration sensor.
The protrusion 29 is fitted in the belt hole 44d, and the case 1 is locked at a predetermined position on the belt 4. As shown in FIG.
The hook 21 protrudes toward the shell 3 when the shells 3 and 2 are engaged with each other, and constitutes part of the periphery of the through hole formed by the holes 22 and 32 .

The hole 32 continues to the hole 22 when the shell 3 is fitted with the shell 2 . These holes 32, 22 form through holes through which the belt 4 is passed. The hook receiving portion 31 is engaged with the hook 21 inside the hole 32 . The claws of the hooks 21 protrude outside the holes 32, but when the belt 4 is passed through the holes 22, 32, the thickness of the belt 4 prevents the hooks 21 from coming off.

The hole 34 continues to the hole 24 when the shell 3 is fitted with the shell 2 . These holes 34, 24 form through holes through which the belt 4 is passed. The hook receiving portion 33 is engaged with the hook 23 inside the hole 34 . The claws of the hooks 23 protrude outside the holes 34, but when the belt 4 is passed through the holes 24, 34, the thickness of the belt 4 prevents the hooks 23 from coming off. In other words, the belt 4 functions as a bolt for attaching the case 1 to the neck of the cow 5 and preventing the hooks 21 and 23 from being released due to its thickness.

Furthermore, tension in the ±X direction (lateral direction) is applied to the belt 4 to urge the hooks 21 and 23 outwardly of the case 1 . Thereby, the hook 21 is further urged so as not to come off the hook receiving portion 31 . The hook 23 is also biased so as not to come off the hook receiving portion 33 . As a result, even if the thickness of the belt 4 is insufficient or the belt 4 is stretched and thinned, the case 1 can maintain its fitted state.

The O-ring 8 is fitted to the waterproof wall 36 of the shell 3 when the shell 3 is fitted with the shell 2 . By fitting the waterproof wall 26 of the shell 2 (first shell) into this, the gap between the waterproof wall 36 and the waterproof wall 26 is sealed, and a waterproof hollow portion is formed inside. As a result, it is possible to prevent the electronic device installed inside the case 1 from being splashed with water.

When the belt 4 is removed, the claw of the hook 21 projecting outside the hole 32 and the claw of the hook 23 projecting outside the hole 34 appear. By pushing the claw of the hook 21 toward the inside of the case 1, the hook 21 can be easily removed from the hook receiving portion 31. - 特許庁Similarly, the hook 23 can be easily removed from the hook receiving portion 33 by pushing the claw of the hook 23 toward the inside of the case 1 .

FIG. 6 shows a state in which the belt 4 is passed around the neck of the cow 5 and the case 1 is attached to the side of the neck.
A belt 4 is passed through both ends of the case 1 . The case 1 is attached to the side of the neck of the cow 5 by passing the belt 4 around the neck of the cow 5 .

A ballast 7 is also attached to the belt 4 . Due to the weight of the ballast 7, the case 1 is always mounted on the side of the neck of the cow 5. Further, the weight of the ballast 7 causes the belt 4 to have a predetermined tension. The tension of the belt 4 urges the hooks 21, 23 shown in FIG. Thereby, even if the thickness of the belt 4 is not sufficient for regulating the hooks 21 and 23, the hooks 21 and 23 can be urged by the tension of the belt 4.例文帳に追加

The case 1 of the first embodiment locks the two shells together without relying on screws, thus minimizing the number of components. This reduces the production cost of the belt 4, the case 1, and the electronic device, improves robustness, and reduces the number of man-hours required for user operation.
Furthermore, since the structure of the case 1 is simplified, the degree of freedom in shape is improved. As a result, the case 1 can be easily fitted to a living body (livestock such as cattle) and can be shaped to prevent dirt from adhering to it.

The fitting structure portion of the case 1 of the first embodiment is covered with the belt 4 and is less likely to be exposed. As a result, gaps for dirt to enter are reduced, and sticking and the like are less likely to occur.
Further, by removing the belt 4, the dirt can be easily removed.

<<Second embodiment>>
The number of fitting structure portions between the first shell and the second shell is not limited to two. In the second embodiment, the first shell and the second shell have a single fitting structure.

FIG. 7 is a front view showing case 1A in the second embodiment.
Case 1A is configured by fitting shell 2A and shell 3A. The shell 2A has a -X end (left end) hole 22 and a hook 21 formed therein. The shell 3A has a hole 32 and a hook receiving portion 31 formed at the -X end (left end). The hook 21 and the hook receiving portion 31 are arranged inside the holes 22 and 32 while the shell 3A and the shell 2A are fitted together. As a result, the case 1A can maintain the fitting between the shells 3A and 2A as long as the belt 4 of FIG. 1 passes through the holes 22 and 32 of the case 1A. Furthermore, by removing the belt 4 from the case 1A and pushing the claws of the hooks 21 into the case 1A, the fitting between the shells 3A and 2A can be released.

A hinge 11 is formed at the +X end (right end) of shell 2A and shell 3A. A hole 25 penetrating through the shell 2 is formed on the −X side (inner side) of the hinge 11 of the shell 2A. A hole 38 penetrating the shell 3 is formed on the −X side (inner side) of the hinge 11 of the shell 3A. With the shell 3A fitted with the shell 2A, the hole 25 continues with the hole 38 so that the belt 4 of FIG. 1 can pass therethrough. As a result, through-holes for passing the belt 4 are formed at two locations facing each other across the hollow portion of the case 1A, so that the case 1A can be securely attached to the object.

<<Third Embodiment>>
In the third embodiment, hooks and hook receiving portions are alternately provided on the right and left sides of the first shell and the second shell.
FIG. 8 is a front view showing case 1B in the third embodiment.
The case 1B has a hole 22 and a hook 21 formed on the −X end (left end) of the shell 2B, and a hole 25 formed on the +X side (right side). Further, the case 1B has a hook receiving portion 31 formed inside the hole 32 of the shell 3B and a hook 37 formed at the +X end (right end). A hook receiving portion 27 formed inside the hole 25 engages with the hook 37 . A hook receiving portion 31 formed inside the hole 32 engages with the hook 21 . In this manner, hooks and hook receiving portions may be alternately formed on the shell 2B and the shell 3B.

As a result, no matter what direction the belt 4 is passed through the case 1B, the hook in one of the holes is urged in a direction to maintain engagement by the tension of the belt 4 . It is also possible to manufacture the shell 2B and the shell 3B with the same mold.

<<Fourth embodiment>>
In the fourth embodiment, by forming through-holes in oblique directions at both ends of the case, the direction in which the belt is to be passed is indicated to the user.
FIG. 9 is a cross-sectional view showing the case in the fourth embodiment.
The case 1C has holes 22, 24 and hooks 21, 23 formed in the shell 2C, a hook receiving portion 31 formed in the hole 32 of the shell 3C, and a hook receiving portion 33 formed in the hole 34 of the shell 3C.

The holes 22 and 24 are inclined so that the distance between the holes 22 and 24 increases in the -Y direction (downward), that is, as the shell 3C is approached. The holes 32 and 34 are also slanted so that the distance between the holes 32 and 34 increases in the -Y direction (downward), that is, as the distance from the shell 2C increases. That is, the holes 22, 32 (through holes) through which the belt 4 is passed and the holes 24, 34 (through holes) are inclined so as to separate in the -Y direction (downward).

This prevents the user from confusing how the belt 4 should be passed through the holes 22 and 32 and the holes 24 and 34 . Therefore, the hooks 21 and 23 of the case 1C are urged by the tension of the belt 4 in the direction to maintain the fitting.

<<Fifth Embodiment>>
In the fifth embodiment, after the first shell and the second shell are fitted together, the portion integrated with the first shell is pushed into the hole of the case and used as a bolt.
FIG. 10 is a cross-sectional view showing the case in the fifth embodiment.
Case 1D is formed by fitting shell 3D and shell 2D. Bars 6L and 6R are made of a flexible material and are bonded to the top of shell 2D to be integrated with shell 2D.

With the shell 3D fitted with the shell 2D, the hole 32 is connected to the hole 22 and the bar 6L is passed therethrough. The hook receiving portion 31 is engaged with the hook 21 inside the hole 32 .
Further, the hole 34 is connected to the hole 24, and the bar 6R is passed therethrough. The hook receiving portion 33 is engaged with the hook 23 inside the hole 32 .

A hole 61L is drilled at the end of the bar 6L. A hole 61R is drilled at the end of the bar 6R. The belt 4 is passed through these holes 61L and 61R so that the case 1D is locked to the belt 4. As shown in FIG. In this manner, the case 1D may be indirectly locked to the belt 4 via the bars 6L and 6R without passing the belt 4 directly. Moreover, since the bar part is integrated with the first shell, the number of parts can be reduced and the labor for management can be saved.

<<Sixth embodiment>>
The sixth embodiment explicitly shows the fitting state of the first shell and the second shell.
FIG. 11 is a right side view showing the first shell and the second shell of the case according to the sixth embodiment.
A hook 23 and a hole 24 adjacent to the base of the hook 23 are formed on the right side of the shell 2E. Furthermore, a green marker 231 and a red marker 232 are attached to the side surface of the hook 23 to indicate the mated state.

On the right side of the shell 3E, a window 331 for visually confirming the fitting state and a hole 32 passing through the shell 3E in the ±Y direction (vertical direction) are formed. The window portion 331 is transparent, and the shell 3E other than the window portion 331 is opaque.

FIG. 12 is a right side view showing a state in which shell 2E and shell 3E are correctly fitted.
Case 1E is configured by fitting shell 2E and shell 3E. Only the green marker 231 is visible through the window 331 when the shell 2E and the shell 3E are correctly fitted. This allows the user to easily visually confirm that the case 1E is properly fitted.

FIG. 13 is a right side view showing a state in which the shells 2E and 3E are not correctly fitted.
The shell 2E and the shell 3E are not properly fitted, and a gap S is generated. In addition to the green marker 231 , the red marker 232 is also visible through the window 331 when the shell 2</b>E and the shell 3</b>E are not properly fitted. Thereby, the user can easily visually recognize that the fitted state of the case 1E is not correct.

<<Seventh embodiment>>
In the seventh embodiment, instead of the first shell, a hook is provided on the second shell, the claws of this hook are directed inward, and the hook receiving portion of the first shell is provided on the hollow portion side of the hole. .
FIG. 14 is a cross-sectional view showing the case in the seventh embodiment.
The case 1F is constructed by fitting the shell 3F with the shell 2F. The shell 3F is a first shell in which a hook 35 and a hole 32 (first hole) adjacent to the base of the hook 35 are formed. A claw of the hook 35 protrudes toward the inside of the case 1F. The shell 3F is formed with a hook 39 and a hole 34 (first hole) adjacent to the root of the hook 39 . A claw of the hook 39 protrudes toward the inside of the case 1F.
Holes 22 and 24 are formed in the shell 2F. A hook receiving portion 28 is formed inside the hole 22 . A hook receiving portion 20 is formed inside the hole 24 .

The hole 32 continues to the hole 22 while the shell 3F is fitted with the shell 2F. These holes 32, 22 form through holes through which the belt 4 is passed. The hook receiving portion 28 is engaged with the hook 35 inside the hole 22 . A claw of the hook 35 protrudes outside the hole 22 . A claw of the hook 39 protrudes outside the hole 24 .

Furthermore, the hole 34 continues to the hole 24 . These holes 34, 24 form through holes through which the belt 4 is passed. The hook receiving portion 20 engages the hook 39 inside the hole 24 . The belt 4 functions as an attachment for attaching the case 1 to the neck of the cow and restricting release of the hooks 35 and 39 .

A tension in the ±X direction (lateral direction) is applied to the belt 4 to urge the hooks 35 and 39 inward. Thereby, the hook 35 is regulated so as not to come off the hook receiving portion 28 and the hook 39 is regulated so as not to come off the hook receiving portion 20 . Furthermore, since the belt 4 covers the fitting portion, external force does not act on the hooks 35 and 39, making it difficult for them to come off.

The O-ring 8 is sandwiched between the waterproof wall 26 and the waterproof wall 36 in a state where the shell 3F is fitted with the shell 2F. It is possible to prevent the installed electronic equipment from being splashed with water.

When the belt 4 is removed, the claws of the hooks 35,39 are exposed outside the holes 22,24. Therefore, the hook 35 can be easily removed from the hook receiving portion 28 by pulling the claw of the hook 35 to the outside of the case 1 . Similarly, the hook 39 can be easily removed from the hook receiving portion 20 by pulling the claw of the hook 39 to the outside of the case 1 .

(Modification)
The present invention is not limited to the above-described embodiments, and can be modified without departing from the scope of the present invention. For example, there are the following (a) to (f).

(a) Objects to which cases are attached are not limited to livestock such as cattle. It may be a person such as a child, an elderly person, or an adult, a mobile object such as a bicycle, a motorcycle, an automobile, or a railroad vehicle, or a fixed object such as a building.
(b) The number of holes in which hooks and hook receiving portions are formed is not limited to one or two.
(c) The means for attaching the case to the object is not limited to the belt. For example, the case may be attached to the object with a rope or the like.
(d) The method of indicating that the first and second shells are properly mated is not limited to the combination of markers and windows. For example, when the hook gets over the hook receiving portion, it may collide with the tuning fork, and the tuning fork may emit a sound.
(e) The direction of the claws of the hook is not limited to outward and inward directions of the case. It may be in the circumferential direction of the case or in any direction. Alternatively, the outward claw of the case may be provided at one end of the case, and the inward claw of the case may be provided at the other end of the case.
(f) The holes through which the belt is passed are not limited to two holes facing each other across the hollow portion of the case, but may be formed at four, six, or eight holes.

1, 1A, 1B, 1C, 1D, 1E, 1F Case 11 Hinge 2, 2A, 2B, 2C, 2D, 2E Shell (first shell)
2F shell (second shell)
21, 23 Hook 231 Green marker 232 Red marker 22, 24 Hole (1st hole)
25 Hall (2nd Hall)
26 waterproof walls 27, 28, 20 hook receiving portion 29 projections 3, 3A, 3B, 3C, 3D, 3E shell (second shell)
3F shell (1st shell)
31, 33 hook receiving parts 32, 34 hole (second hole)
38 hole 331 window 36 waterproof wall 35, 37, 39 hook 4 belt (locking tool)
41 Buckle 42 Ring 43 Belt loops 44a-44e Belt hole 5 Cow (Object)
6L, 6R Bar 7 Ballast 8 O-ring

Claims (7)

A hook with an overhanging claw, a first shell formed with a first hole adjacent to the base of the hook, and a second hole formed inside with a hook receiving portion that engages with the hook are formed. A case configured by fitting the second shell with
The first shell and the second shell are fitted so that the first hole and the second hole are connected to form a through hole through which the mounting tool is passed,
A case characterized by: In a state where the first shell and the second shell are fitted together, the claw of the hook protrudes outside the through-hole,
The case according to claim 1, characterized in that: The through hole, the hook, and the hook receiving portion are formed in at least two locations facing each other across the hollow portion of the case.
3. Case according to claim 1 or 2, characterized in that: one pair of the plurality of through-holes facing each other is inclined so as to separate as one of the first shell and the second shell is approached;
4. The case according to claim 3, characterized in that: The first shell excluding the hook and the second shell excluding the hook receiving portion are symmetrical with respect to the fitting surface,
The case according to claim 1, characterized in that: A hole is drilled in the mounting device,
At least one of the first shell and the second shell is formed with a projection that fits into a hole of the mounting device,
The case according to claim 1, characterized in that: A window is formed to indicate a fitting state between the first shell and the second shell.
The case according to claim 1, characterized in that:

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