JP2020088036A - Protection construction and protection method of electric box - Google Patents

Abstract

To provide a protection construction and a protection method of a highly reliable electric box that prevents unauthorized access to the inside of the electric box.SOLUTION: A protection construction of an electric box 1 includes a security switch 7 provided on the electric box 1, and an operation portion 3a1 provided in a unit 3a arranged adjacent to the electric box 1. When the unit 3a is located adjacent to the electric box 1, the operation portion 3a1 keeps the security switch 7 inactive, and when the unit 3a is located away from the electric box 1, the security switch 7 released from the interference of the operation portion 3a1 operates.SELECTED DRAWING: Figure 8

Description

The present invention relates to a protection structure and a protection method for an electric box.

An electric/electronic device such as a projector generally has a box-shaped device in which various parts such as electric parts and optical parts are built in a housing. Such a device is called an electric box. Then, for example, various units such as a cooling unit having a fan for preventing overheating of various components in the electric box and a board unit for electrically connecting various components in the electric box to an external member are the electric boxes. Is located adjacent to.

In recent years, protection of data processed by various components inside an electric box may be required. For example, it may be necessary to prevent illegal acquisition of video data processed by the projector. In such cases, it is desirable to have no free access to the inside of the electrical box. In particular, an opening may be formed in a portion of the electric box where the unit is mounted. Therefore, when the unit is removed, the opening of the electric box is exposed, and the inside of the electric box can be easily accessed through the opening, which poses a serious security problem.

Patent Document 1 discloses a structure in which a security switch is attached and the cover cannot be disassembled unless the cover is removed in order.

JP, 2004-172455, A

In the structure described in Patent Document 1, if the covers are removed in order, the security switch can be disassembled without working, so that the data and the like in the electric box cannot be sufficiently protected.

Therefore, an object of the present invention is to provide a highly reliable electric box protection structure and method for preventing unauthorized access to the inside of the electric box.

An electric box protection structure of the present invention includes a security switch provided in the electric box and an operation unit provided in a unit arranged adjacent to the electric box, and the unit is adjacent to the electric box. In the state where the unit is located, the operating unit keeps the security switch in the non-operating state, and in the state where the unit is located away from the electric box, the security switch released from the interference of the operating unit operates.

According to the method for protecting an electric box of the present invention, a unit is arranged adjacent to the electric box, and an operation section provided on the unit is brought into contact with a security switch provided on the electric box to deactivate the security switch. Maintaining the condition, moving the unit away from the electrical box, moving the controls away from the security switch, and activating the security switch.

According to the protection structure and the protection method of the electric box of the present invention, the reliability of preventing unauthorized access to the inside of the electric box is high.

1 is a perspective view of a projector including a protective structure for an electric box according to an exemplary embodiment of the present invention. 1A is a perspective view of an electric box and a unit of the projector shown in FIG. 1, and FIG. 1B is a perspective view showing one unit and its surroundings, as viewed from an angle different from FIG. FIG. 2 is a perspective view showing a fan unit, a board fixing bracket, and a plate of the projector shown in FIG. 1. 3A is a perspective view of the board fixing member shown in FIG. 3, FIG. 3B is a perspective view seen from an angle different from FIG. 3A, and FIG. 3C is a perspective view showing a security switch and its periphery. FIG. 4 is a perspective view of the plate shown in FIG. 3. FIG. 4 is a perspective view of one fan unit shown in FIG. 3. It is a perspective view of the other fan unit shown in FIG. (A) is a perspective view showing a process of removing one fan unit from the electric box shown in FIG. 2, (b) is a perspective view showing an engagement state of one fan unit and a plate, and (c) is the other fan unit. It is a perspective view which shows the engagement state of a plate. FIG. 3 is a perspective view showing a process of removing a fan unit from the electric box shown in FIG. 2. FIG. 3A is a perspective view showing the electric box shown in FIG. 2 with a fan unit removed, and FIG. 3B is a perspective view seen from an angle different from FIG. (A) A perspective view of a server including a protection structure for an electric box according to another embodiment of the present invention, (b) a perspective view of one computer included in the server shown in (a), and (c) (b). 3 is a perspective view of an electric box and a unit included in the computer shown in FIG. (A) is a schematic diagram showing a state in which a unit is adjacent to an electric box in a protection structure for an electric box according to still another embodiment of the present invention, and (b) is a unit separated from the electric box. It is the schematic which shows a state typically.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a projector 2 including an electric box 1 of the present invention. Although not shown, the projector 2 is a device that incorporates a light source, an optical component, an electrical component, and the like, and projects an image or video to the outside based on the supplied data. Some of various components inside the projector 2 are built in the electric box 1 shown in FIG. The electric box 1 is normally exposed from the opening 9a of the rear panel 9. In FIG. 1, the arrangement portion of the electric box 1 is shown by a chain double-dashed line for the sake of clarity. As shown in FIG. 2, the projector 2 has fan units 3a and 3b for cooling various components contained in the electric box 1 and a connecting portion for electrically connecting with external members. The board unit 4 is arranged. These units (fan units 3a and 3b and substrate unit 4) are attached to any of the surfaces of the electric box 1.

The electric box 1 of the present embodiment has a board fixing member 5 shown in FIGS. The board fixing fittings 5 are located on three side surfaces of the electric box 1. The fan units 3a and 3b are attached to two side surface portions of the board fixing member 5 which face each other. Notches 5a and 5b are provided at the bottoms of the side surfaces. An elongated strip-shaped plate 6 shown in FIGS. 3 and 5 is arranged at the bottom of the electric box 1. Bent portions 6a and 6b are formed at both ends of the plate 6, respectively, and the bent portions 6a and 6b are arranged inside the cutout portions 5a and 5b, respectively. The distance between the bent portions 6a and 6b of the plate 6 is longer than the distance between the cutout portions 5a and 5b of the board fixing member 5, and the plate 6 can slide smoothly in the longitudinal direction below the board fixing member 5.

As shown in FIG. 6, the fan unit 3a attached to the board fixing member 5 has a slit 3a2 and a convex insertion portion 3a1 that is an operation portion located side by side with the slit 3a2. As shown in FIG. 7, the fan unit 3b is provided with a bent portion 3b1. As shown in FIG. 8, the bent portion 6a at one end of the plate 6 is inserted into the slit 3a2 of the fan unit 3a. The bent portion 6b at the other end of the plate 6 has a role of engaging with the other fan unit 3b and holding the fan unit 3b so as not to move upward. The bent portion 3b1 of the fan unit 3b is inserted into the recessed portion of the bottom portion of the board fixing member 5, and in this state, the movement of the fan unit 3b is restricted in a direction other than the vertical direction.

As shown in FIGS. 4 and 8A, a security switch 7 is attached to the electric box 1. The security switch 7 of the present embodiment has a displaceable contact piece 7a, and is switched on and off by pressing and releasing the contact piece 7a. Then, when the security switch 7 of the present embodiment is activated, the operation of the electric parts inside the electric box 1 is stopped, and the electric box 1 becomes inoperable. In the present embodiment, when the fan unit 3a is attached to the electric box 1, the insertion portion 3a1 contacts the contact piece 7a to keep the security switch 7 in the inoperative state. The periphery of the security switch 7 is covered with a cover-like protective metal fitting 8 so that the security switch 7 can be operated intentionally or unintentionally from outside by a method other than the insertion portion 3a1 of the fan unit 3a. It is preventing. The security switch 7 of the present invention is not limited to the configuration having the contact piece 7a, and any configuration can be used as long as it is switched on and off by being engaged with and disengaged from the insertion portion 3a1. May be Further, the configuration is not limited to the configuration in which the electric box 1 is inoperable when the security switch 7 is activated, and a configuration that emits a sound or a warning display indicating an abnormality, or a configuration that temporarily suspends or changes the operation of the electrical box. You may.

As described above, in the present embodiment, the fan units 3a and 3b are attached to the board fixing fittings 5 that form the side surfaces of the electric box 1. The bent portion 6a is inserted into the slit 3a2 of the fan unit 3a so that the fan unit 3a and the plate 6 can slide integrally. The bent portion 6b of the plate 6 is engaged with the fan unit 3b, and the bent portion 3b1 of the fan unit 3b is engaged with the plate 6. The insertion portion 3a1 of the fan unit 3a is in contact with the contact piece 7a of the security switch 7. In this state, the security switch 7 does not operate, and various parts inside the electric box 1 can operate normally.

In order to take out the electric box 1 from this state, it is necessary to remove the fan units 3a and 3b. This is because when the fan units 3a and 3b are located adjacent to the electric box, the screw 10 (see FIG. 9) that fixes the electric box 1 is hidden by the fan units 3a and 3b and cannot be removed. Therefore, when the fan units 3a and 3b are fixed to the board fixing member 5 by using fixing members (not shown) such as screws, these fixing members are first removed. Then, as shown by an arrow A1 in FIG. 8A, the fan unit 3a is moved along the longitudinal direction of the plate 6 so as to be separated from the side surface portion of the board fixing member 5. At this time, the insertion portion 3a1 of the fan unit 3a is separated from the contact piece 7a of the security switch 7, and the security switch 7 released from the interference of the insertion portion 3a1 operates. As a result, the power supply to the electric box 1 is cut off, the respective parts inside the electric box 1 become inoperable, a part of their operation is temporarily stopped or changed, and a warning sound or Security processing is performed, such as issuing a warning display to notify an abnormality.

Further, the plate 6 slides in the longitudinal direction integrally with the fan unit 3a, and the bent portion 6b of the plate 6 separates from the fan unit 3b. This allows the fan unit 3b to move in the vertical direction. Therefore, the fan unit 3a that has moved away from the side surface of the board fixing member 5 and the fan unit 3b that has been released from the regulation by the bent portion 6b of the plate 6 are moved upward as shown by arrow A2 in FIG. To move. In this way, the fan units 3a and 3b are removed from the board fixing member 5. As shown in FIG. 10, when the fan units 3a and 3b are removed, the screw 10 is exposed. Therefore, the screw 10 is removed and the electric box 1 is removed. At this time, since the security switch 7 away from the insertion portion 3a1 is in operation, normal operation of the electric box cannot be performed or an abnormality is reported. As a result, it becomes impossible to acquire the data processed by the parts in the electrical box, and the person in charge of the abnormality takes measures to prevent fraud. Can be prevented.

FIG. 11 shows an example in which the present invention is applied to a server as another embodiment of the present invention. The server housed in the casing 11 shown in FIG. 11A has a computer 12 shown in FIG. 11B. The electric box 13 and the fan unit 14 shown in FIG. 11C are built in the computer 12. The protection structure and the protection method for the electric box 13 are the same as those in the above-described embodiment of the projector, and thus the description thereof will be omitted.

FIG. 12 schematically shows a simpler embodiment of the present invention. The electric box protection structure of the present embodiment includes a security switch 16 provided in the electric box 15 and an operation unit 18 provided in a unit 17 arranged adjacent to the electric box 15. In the state where the unit 17 is located adjacent to the electric box 15 as shown in FIG. 12A, the operation portion 18 keeps the security switch 16 in the inoperative state, and the unit 17 is kept in the inactive state as shown in FIG. In a state in which the security switch 16 is located away from the electric box 15, the security switch 16 released from the interference of the operation unit 18 operates.

Then, in the method of protecting the electric box of the present embodiment, the unit 17 is arranged adjacent to the electric box 15, and the operation portion 18 provided in the unit 17 is applied to the security switch 16 provided in the electric box 15. Contacting them to keep the security switch 16 in an inoperative state, moving the unit 17 away from the electric box 15, separating the operating portion 18 from the security switch 16, and activating the security switch 16. including.

As described above, the present invention proposes a novel structure and method in which the security switch is operated in association with the removal of the unit arranged adjacent to the electric box. Although the specific operation of the security switch is not limited, the operation of the security switch disables or restricts access to data and the like processed by the components built in the electric box. This makes it possible to prevent problems such as illegal acquisition of data. The electric box may be built in or mounted in the projector, the server, and various other electronic/electrical devices as described above. The unit adjacent to the electric box is not limited to the fan unit or the board unit, and may be a unit having various uses and configurations. It is desirable that each unit does not have an opening in consideration of security, but it may be provided with an opening for cooling or the like.

1 Electric Box 2 Projectors 3a, 3b Fan Unit 3a1 Insertion Section (Operation Section)
3a2 Slit 3b1 Bent portion 4 Board unit 5 Board fixing metal fittings 5a, 5b Cutout portion 6 Plates 6a, 6b Bending portion 7 Security switch 7a Contact piece 8 Protective metal fitting 9 Rear panel 9a Opening portion 10 Screw 11 Casing 12 Computer 13 Electrical box 14 Fan unit 15 Electric box 16 Security switch 17 Unit 18 Operation part

Claims (7)

A security switch provided on the electric box, and an operation unit provided on a unit arranged adjacent to the electric box,
When the unit is located adjacent to the electric box, the operation section keeps the security switch inactive, and when the unit is located away from the electric box, the operation section is free from interference. The protective structure of the electric box, wherein the security switch is activated. The electric box protection structure according to claim 1, wherein the operation section is an insertion section that extends from the unit toward the electric box and contacts the security switch. The two units are respectively arranged on side surfaces of the electric box that face each other,
Having a plate that is movable integrally with one of the units,
In a state where one of the units is located adjacent to the electric box, a part of the plate engages with the other unit to restrict movement of the other unit in one direction, The electric box protection structure according to claim 1 or 2, wherein the restriction of movement of the other unit in the one direction is released in a state where the unit is located away from the electric box. The electric box according to any one of claims 1 to 3, wherein a screw for fixing the electric box is covered with the unit when the unit is located adjacent to the electric box. Protective structure. The electric box protection structure according to any one of claims 1 to 4, wherein the electric box is provided inside a projector, and the unit is a fan unit. The electric box protection structure according to claim 1, wherein the electric box is provided inside a server computer, and the unit is a fan unit. Arranging the unit adjacent to the electric box, keeping the security switch inactive by abutting an operating portion provided on the unit with a security switch provided on the electric box; Moving the unit away from the electric box, moving the operating section away from the security switch, and activating the security switch.

Images