JP6984878B2 - Protective cover - Google Patents

Description

The present invention relates to a protective cover that protects terminals of electrical equipment.

Currently, in an electric device such as a circuit breaker used in a control panel or the like, a configuration using a protective cover for protecting terminals and the like exposed to the outside is known (see, for example, Patent Documents 1 to 3).

Patent Document 1 discloses a technique of thermoforming a resin sheet to form a protective cover, and Patent Document 2 discloses a case opening of a cylindrical capacitor with a rubber cap as a protective cover. The technology is disclosed. Further, Patent Document 3 discloses a technique for forming a protective cover by molding a resin material.

Japanese Unexamined Patent Publication No. 09-306567 Japanese Unexamined Patent Publication No. 10-335184 Japanese Unexamined Patent Publication No. 11-096880

However, the protective cover described above is designed for each electrical device. Therefore, in the case of an electric device having a small sales quantity, if it is designed and manufactured for each electric device, the manufacturing cost becomes high.

Therefore, it is an object of the present invention to provide a protective cover that can be manufactured at low cost.

According to one aspect of the present invention, a protective cover formed by bending a sheet-shaped blank having an insulating property, the back wall, a top wall provided integrally with the back wall, and the back wall. Together with one of the top wall and the pair of side walls, each of which is provided with a pair of side walls provided integrally and a notch portion provided in an electric device into which a pair of protrusions having a tip larger than the middle portion are inserted. It is provided with a pair of front walls that engage with the other of the top wall and the pair of side walls.

The present invention can provide a protective cover that can be manufactured at low cost.

The perspective view which shows the structure of the protective cover which concerns on one Embodiment of this invention. The front view which shows the structure of the protective cover. Explanatory drawing showing the development of the protective cover. A side view showing an example of using the protective cover. The rear view which shows an example of the use of the protective cover. The front view which shows an example of the use of the protective cover. A side view showing an example of an electric device in which the protective cover is used. The rear view which shows an example of the electric device. Explanatory drawing which shows an example of manufacturing and use of the protective cover.

Hereinafter, the protective cover 1 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 9.
1 and 2 are views showing the configuration of the protective cover 1 according to the embodiment of the present invention in a perspective view and a front view. FIG. 3 is a plan view showing the configuration of the blank 2 in which the protective cover 1 is unfolded. 4 to 6 are views showing the state of being attached to the electric device 100 from the side surface, the back surface, and the front surface, respectively, as an example of the use of the protective cover 1. 7 and 8 are views showing an example of the electric device 100 on the side surface and the back surface. FIG. 9 is an explanatory diagram showing an example of manufacturing and use of the protective cover 1.

As shown in FIGS. 1 and 4, the protective cover 1 is attached to the electric device 100, and the tip of the protective cover 100 is engaged with a protrusion extending in a direction orthogonal to the axial direction from the middle portion. It is a cover that covers the terminal portion 111 of the electric device 100. First, the electric device 100 will be described with reference to FIGS. 7 and 8.

The electric device 100 is an electric device such as a circuit breaker used for a control panel or the like. The electric device 100 is a device including, for example, a terminal unit 111 such as a charging unit such as a voltmeter, an ammeter, a frequency meter, a switch, a circuit breaker, a switch, a terminal block, an inverter, and a motor. As shown in FIGS. 7 and 8, the electric device 100 has, for example, a case 110 having a display unit or the like provided on the front surface, and a terminal unit 111 provided on a part of the outer surface of the case 110. Further, in the electric device 100, when the terminal portion 111 is covered with the protective cover 1, the electric cable 130 is connected to the terminal portion 111.

The case 110 is configured to accommodate electrical components. Various shapes such as a rectangular shape and a cylindrical shape can be applied to the case 110 as long as it can accommodate electrical parts. The case 110 is provided with a terminal portion 111 on a part of the outer surface, for example, the back surface.

The terminal portion 111 has a pair of terminals 120 protruding from the outer surface of the case 110 and separated from each other at a predetermined interval. The pair of terminals 120 are protrusions arranged on the case 110 at predetermined intervals. The pair of terminals 120 are arranged in the horizontal direction, for example, when the electric device 100 is mounted on a control panel or the like. The pair of terminals 120 are composed of, for example, a male screw portion 120a and a female screw portion 120b such as two nuts, and are configured to be able to fix the electric cable 130. The terminal 120 is configured by the female screw portion 120b to be larger than the male screw portion 120a whose tip is in the middle.

Next, the protective cover 1 that covers the terminal portion 111 of the electric device 100 will be described with reference to FIGS. 1 to 7.

The protective cover 1 is formed by bending a blank 2 made of an insulating resin material or a paper material, and is formed in a rectangular box shape with an opening on the lower surface side. As a specific example, the protective cover 1 is integrated with the back wall 11, the pair of side walls 12 integrally provided with the back wall 11, the top wall 13 integrally provided with the back wall 11, and the pair of side walls 12, respectively. A pair of front walls 14 provided in the above.

The back wall 11 is formed in a rectangular shape in which the X direction is longer than the Z direction, for example, in the X, Y, and Z directions orthogonal to each other in FIG. 1, in which one direction is longer than the other direction. The width of the back wall 11 in the longitudinal direction is formed to be larger than the distance from one terminal 120 to the other terminal 120.

The side wall 12 is formed, for example, in a rectangular shape in which the Y direction is shorter than the Z direction in FIG. 1 in which one direction is shorter than the other direction. The width of the side wall 12 in the lateral direction is larger than the height from the outer surface of the case 110 provided with the pair of terminals 120 to the tip of the pair of terminals 120. The side wall 12 is formed so that one side portion along the longitudinal direction is integrally formed with one side portion along the lateral direction of the back wall 11.

The top wall 13 is formed, for example, in a rectangular shape in which one direction is longer than the other direction and the X direction is longer than the Y direction in FIG. The width in the longitudinal direction of the top wall 13 is formed to be the same as the width in the longitudinal direction of the back wall 11. The top wall 13 is formed so that one of the two side portions along the longitudinal direction, that is, one of the two side portions in the lateral direction is integrally formed with one side portion along the longitudinal direction of the back wall 11. To.

The top wall 13 is formed so that the length direction in the lateral direction is longer than the length in the lateral direction of the side wall 12, and the width is gradually increased from the side portion of the top wall 13 on the center side of the other side portion along the longitudinal direction. Has a trapezoidal notch 13a that spreads out. In other words, the top wall 13 is formed so that the length direction in the lateral direction is the same as the length in the lateral direction of the side wall 12, and a pair is formed at both ends of the other side portion along the longitudinal direction, and the tip thereof is formed. It has a trapezoidal first protrusion 13b that protrudes toward the center of the side.

The front wall 14 is formed, for example, in a substantially rectangular shape in which one is shorter than the other direction, the X direction is shorter than the X direction in FIG. 1, and a part is notched. The front wall 14 has a second protrusion 14a extending upward and engaging with the first protrusion 13b at the tip of the upper side portion in the lateral direction. Further, the front wall 14 has a substantially L-shaped notch 14b extending from the lower end to the middle portion along the longitudinal direction of the front wall 14 and extending from the middle portion to the side wall 12 side.

The second protrusion 14a is formed in a trapezoidal shape in which the width gradually increases from the upper side portion of the front wall 14. The second protrusion 14a fixes the front wall 14 to the top wall 13 by engaging with the first protrusion 13b of the top wall 13. That is, the protective cover 1 has a configuration in which two or three surfaces are engaged and integrally assembled in a box shape. In the present embodiment, the protective cover 1 has two front walls 14 fixed to the top wall 13. Consists of.

The width of the notch portion 14b in the extending direction is configured so that the male screw portion 120a, which is an intermediate portion of the terminal 120, can pass through the notch portion 14b. The width of the notch portion 14b may be the same as that of the female screw portion 120b which is the tip of the terminal 120, or may be smaller than that of the female screw portion 120b.

Further, the width between the pair of notches 14b provided on the pair of front walls 14 is larger than the width between the pair of terminals 120 at the portion extending toward the top wall 13 when the protective cover 1 is assembled. It is composed of a slightly smaller width. More preferably, the width between the pair of notches 14b is larger than the width between the male screw portions 120a, which is the middle portion of the pair of terminals 120, at the portion extending toward the top wall 13 when the protective cover 1 is assembled. Is also configured with a slightly smaller width.

Further, the width between the pair of notched portions 14b is such that when the protective cover 1 is assembled, the portion extending toward the side wall 12 has a width equal to or larger than the width of the pair of terminals 120. That is, the pair of notched portions 14b interferes with the pair of terminals 120 at the portion facing the top wall 13 in the assembled protective cover 1, and the pair of terminals 120 can be arranged at the portion facing the side wall 12. ..

Next, the blank 2 of the protective cover 1 having such a configuration will be described. The blank 2 is formed by punching a sheet made of an insulating resin material into a predetermined shape using a Thomson mold.

In the blank 2, a pair of side walls 12 and a top wall 13 are integrally formed on the back wall 11, and a front wall 14 is integrally formed on each of the pair of side walls 12. Further, the blank 2 is an indentation forming a fold line during bending processing between the back wall 11 and the side wall 12, between the back wall 11 and the top wall 13, and between the side wall 12 and the front wall 14. Has 2a.

Next, an example of a method of manufacturing and a method of using the protective cover 1 configured as described above will be described with reference to FIG.

As shown in FIG. 9, first, a sheet made of a resin material is punched using a Thomson mold to form a blank 2 having a predetermined shape as shown in FIG. 3 (step ST1). At this time, the indentation 2a is also formed on the blank 2. The indentation 2a is formed at the time of punching, for example, by providing a protrusion in the shape of the indentation 2a on the Thomson mold.

Next, the blank 2 is bent along the indentation 2a (step ST2). Next, the bent blank 2 is assembled into the shape of the protective cover 1 (step ST3). Specifically, the second protrusion 14a of the pair of side walls 12 is engaged with the first protrusion 13b of the top wall 13, respectively. As a result, the protective cover 1 is formed.

Next, the protective cover 1 is directed so that the opening faces the terminal portion 111 of the electric device 100 on the opposite side, and the notch portion 14b of the pair of front walls 14 faces the pair of terminals 120 (step ST4). Next, the protective cover 1 is moved to cover the pair of terminals 120 until the pair of terminals 120 abut on the end of the notch 14b (step ST5).

At this time, since the width of the notch 14b of the pair of front walls 14 is smaller than the width of the pair of terminals 120, the pair of notches 14b are separated from each other when the terminals 120 pass through. The pair of front walls 14 are pressed by the terminals 120, and the front walls 14 move slightly so that the pair of notches 14b expand.

As a result, the pair of terminals 120 move through the pair of notched portions 14b, and the terminals 120 pass through the notched portions 14b. When the terminals 120 move to the end of the notch 14b, the front wall 14 moves to its original position and the pair of terminals 120 are located at the end of the notch 14b. Therefore, when the protective cover 1 is moved from the pair of terminals 120 in the direction in which the protective cover 1 is removed, the bent portion of the notch portion 14b comes into contact with the pair of terminals 120, and the movement of the protective cover 1 is restricted. That is, when the protective cover 1 moves in a direction away from the pair of terminals 120, the notch portion 14b is caught by the pair of terminals 120.

The protective cover 1 configured in this way is easy and easy because the blank 2 is formed by an inexpensive Thomson mold and then bent to form a box shape by engaging a plurality of surfaces. , Can be manufactured at low cost.

Further, the protective cover 1 has an L-shaped notch 14b in which the terminal 120 is arranged, and a terminal extending in a direction for moving the protective cover 1 when the pair of terminals 120 are inserted into the pair of notches 14b. The structure is such that the 120 and the front wall 14 provided with the notch 14b interfere with each other. Further, the protective cover 1 is configured such that the width of the pair of cutout portions 14b at the end portion of the notch portion 14b is equal to or larger than the width of the pair of terminals 120. As a result, when the protective cover 1 is attached to the pair of terminals 120, the bent portion of the L-shaped notch 14b restricts the relative movement of the protective cover 1 and the pair of terminals 120 from the terminal 120. As described above, the protective cover 1 can be configured to be able to easily prevent the protective cover 1 from falling off from the electric device 100.

Further, since the protective cover 1 has a structure in which it is die-cut with a Thomson mold, bent by bending, and a plurality of surfaces are engaged to form a box shape, if such a process is possible, it is protected. The material forming the cover 1 can be appropriately set. That is, since there are various materials that can be die-cut and bent and that can protect the terminal portion 111, the material used for the protective cover 1 has a high degree of freedom and is easy to design.

As described above, according to the protective cover 1 according to the embodiment of the present invention, the terminal portion 111 of the electric device 100 can be protected, and can be easily and inexpensively manufactured.

The present invention is not limited to the above embodiment. In the above-mentioned example, the protective cover 1 has described the configuration in which the pair of terminals 120 are arranged in the notch 14b of the front wall 14, but the protective cover 1 is not limited thereto. That is, the protective cover 1 may cover the terminal portion 111, and for example, the pair of protrusions of the electric device 100 having the same pair of protrusions as the pair of terminals 120 described above may be provided with the pair of notches 14b. It may be configured to be arranged in. In such a configuration, the protective cover 1 may be configured such that the terminal portions 111 are arranged between the pair of front walls 14, and further openings and notches are provided in the front walls to cover the terminal portions 111. It may have the configuration of 14.

Further, in the above-mentioned example, the blank 2 of the protective cover 1 has been described so as to be die-cut with a Thomson mold, but it is sufficient if the blank 2 can be constructed at the same low cost as the Thomson mold. It may be manufactured.

Further, in the above-mentioned example, in the protective cover 1 and the blank 2, the front wall 14 is integrally formed with the side wall 12, and the second protrusion 14a of the front wall 14 is engaged with the first protrusion 13b of the top wall 13. The configuration to be combined has been explained, but the present invention is not limited to this. For example, the protective cover 1 and the blank 2 have a configuration in which the front wall 14 is integrally formed with the top wall 13, and a first protrusion is provided on the side wall 12 so that the protrusions of the front wall 14 and the side wall 12 are engaged with each other. May be.

That is, the present invention is not limited to the above embodiment, and can be variously modified at the implementation stage without departing from the gist thereof. In addition, each embodiment may be carried out in combination as appropriate, in which case the combined effect can be obtained. Further, the above-described embodiment includes various inventions, and various inventions can be extracted by a combination selected from a plurality of disclosed constituent requirements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, if the problem can be solved and the effect is obtained, the configuration in which the constituent elements are deleted can be extracted as an invention.

1 ... protective cover, 2 ... blank, 2a ... indentation, 11 ... back wall, 12 ... side wall, 13 ... top wall, 13a ... notch, 13b ... first protrusion, 14 ... front wall, 14a ... second protrusion , 14b ... Notch, 100 ... Electrical equipment, 110 ... Case, 111 ... Terminal, 120 ... Terminal (projection), 120a ... Male screw, 120b ... Female screw, 130 ... Electric cable.

Claims (7)

A protective cover formed by bending a sheet-like blank having insulating properties.
With the back wall
The top wall provided integrally with the back wall and
A pair of side walls provided integrally with the back wall,
The top wall and the pair of side walls are provided integrally with one of the top wall and the pair of side walls, each of which is provided with a notch for inserting a pair of protrusions having a tip larger than the middle portion of the electric device. A pair of front walls that engage the other of the side walls,
Protective cover with. The top wall or the pair of side walls has a first protrusion.
The protective cover according to claim 1, wherein the front wall has a second protrusion that engages with the first protrusion. The notch extends toward the top wall and the end extends toward the side wall.
The protective cover according to claim 1, wherein the pair of notches is configured such that the width of a portion extending toward the top wall is smaller than the width of the middle portion of the pair of protrusions. The protective cover according to claim 1, wherein the blank is formed by punching with a Thomson mold. The protective cover according to claim 1, wherein the blank has an indentation for bending between the back wall, the top wall, the pair of side walls, and the pair of front walls. The protective cover according to any one of claims 1 to 5, wherein the pair of protrusions is a pair of terminals. The protective cover according to any one of claims 1 to 6, wherein the electric device is a voltmeter, an ammeter, a frequency meter, a switch, a circuit breaker, a switch, a terminal block, an inverter or a motor.

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