JPH0567093U - Grounding hinge on electrical device cover - Google Patents

Abstract

(57) [Abstract] [Purpose] As a structure for improving the electrical connection between two mounting plates that form a hinge, an electrical device that does not require a separate ground wire and allows the cover to be assembled easily. Provide a ground connection hinge for the cover. In a hinge for connecting a movable cover 1 to a fixed cover 2 of an electric device in an openable and closable manner, two mounting plates 3, which are relatively variable in angle with a pin 7 of the hinge as an axis.
4, a part of the blade spring 8 is integrally fixed to the surface of the mounting surface of at least one of the mounting plates, and the relative angle of the two mounting plates 3 and 4 is approximately 90 degrees (or 180 °), the other part of the leaf spring 8 is pressed against and comes into contact with the surface of the other mounting plate facing at that time.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a hinge used in a box body of an electric device, and more particularly to a ground connection hinge that makes good ground connection between divided box bodies.

[0002]

[Prior Art]

 Conventionally, this type of hinge structure generally uses a pin as a common rotation axis, and the ends of two mounting plates are alternately wound around the pin while avoiding the notches at the ends to form two plates. Are configured so that they can be rotated independently, and mounting holes are appropriately formed in the two plates. When used, one mounting plate is attached to the fixed cover and the other mounting plate is attached to the movable cover to connect the divided parts of the box of the electric device.

[0003]

[Problems to be solved by the device]

 In this conventional hinge structure, if the two mounting plates are allowed to move smoothly, the electrical contact between the fixed cover and the movable cover is inevitably insufficient. In order to secure the earth connection there, a separate earth wire 6 is prepared as shown in FIG. 4, and the fixing screws 5 and 6 of the hinge (pin 17 and two plates 13 and 14). Troublesome work such as tightening with or fixing it to another part is required, and there is a drawback such as having to secure a margin of movement range of the ground wire when opening and closing the movable cover. there were.

An object of the present invention is to solve the above-mentioned drawbacks and to provide an electric ground connection between the fixed cover and the movable cover, which allows the cover to be easily assembled without requiring a separate ground wire connection. To provide a ground connection hinge for the device cover.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the earth connection hinge of the electric device cover of the present invention is a hinge for connecting the movable cover 1 to the fixed cover 2 of the electric device so that the movable cover 1 can be opened and closed. Of the two mounting plates 3 and 4 whose angle is variable, at least one mounting plate 4 has a mounting surface on which a part of the leaf spring 8 processed into a blade shape is integrally fixed. When the relative angles of the mounting plates 3 and 4 become approximately 90 degrees, the other part of the leaf spring 8 is pressed against and comes into contact with the surface of the other mounting plate 3 facing at that time.

In order to achieve the above-mentioned object, the earth connection hinge of the electric device cover of the present invention is a hinge for connecting the movable cover 1 to the fixed cover 2 of the electric device so that the movable cover 1 can be opened and closed. Of the two attachment plates 3 and 4 whose angle is relatively variable with respect to the axis, at least one attachment plate 4 is integrally fixed with a part of the leaf spring 8 processed into a blade shape on the surface of the attachment surface. When the relative angle between the two mounting plates 3 and 4 becomes approximately 180 degrees, another part of the leaf spring 8 is pressed against the surface of the other mounting plate 3 facing at that time and comes into contact therewith. To do.

[0007]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side sectional view showing an embodiment of the present invention together with a part of a cover attached to the same. 2 is a side sectional view showing a state in which the embodiment of FIG. 1 is attached to an electric device cover. As shown in FIG. 1, in the hinge of this embodiment, the base of the leaf spring 8 which is the feature of the present invention is attached in addition to the pin 17 and the two attachment plates 13 and 14 which are the same as the conventional rotary shaft. It is integrally fixed to the surface of the plate 4.

In the case of FIGS. 1 and 2, there is a horizontal bent portion at the upper edge of the fixed cover 2 below the electric device cover, and the present embodiment is provided between the bent portion and the upper movable cover 1. It is an example using the example hinge. The hinge is mainly attached to a portion which will be a back surface of the apparatus, and is attached to the movable cover 1 and the fixed cover 2 by screws 5 and 6. In this case, the relative angle between the hinge mounting plates 3 and 4 when the movable cover 1 is closed is 90. There is no problem even if the mounting plate 4 to which the leaf spring 8 is fixed is attached to the movable cover 1 side and the other mounting plate 3 is attached to the fixed cover 2 side.

In the state shown in FIG. 1 and FIG. 2, since the vicinity of the tip of the leaf spring 8 is pressed against the surface of the opposing mounting plate 3 by the bias of the leaf spring 8, the fixed cover 2 and the movable cover 1 are The ground connection is securely made via the hinge of this embodiment. In FIG. 2, when the movable cover 1 is opened in the direction of the arrow, the vicinity of the tip of the leaf spring 8 is separated from the mounting plate 3 which is opposed.

FIG. 3 is an explanatory diagram showing an operation when the two mounting plates of the embodiment of FIG. 1 are set to a relative angle of 90 degrees from a state where they are horizontally opened. As shown in FIG. 3, when the mounting plate 3 is raised, it comes into contact with the vicinity of the tip of the leaf spring 8 at a certain point, and the vicinity of the tip of the leaf spring 8 is attached from there to an angle of 90 degrees. The surface of the plate 3 is rubbed to reach the position shown by the chain double-dashed line in the figure. In this way, when the leaf spring touches, the contact surface is always rubbed and the contact surface is polished, so that the electrical connection is extremely reliable.

1 to 3 show an example in which two hinge mounting plates are grounded at a relative angle of 90 degrees, the ground connection is made at a relative angle of 180 degrees, although not shown. It can be configured in the same manner. In this case, if the leaf spring 8 has a cross section close to one-quarter strength as shown in FIGS. Good. Further, the number of leaf springs 8 is not limited to one, and the number may be increased if necessary in order to improve the ground connection. Further, not only the leaf springs are fixed to one side but also to both mounting plates. Alternatively, they may be alternately brought into contact with the other mounting plate.

[0012]

[Effect of the device]

 As described above, according to the present invention, a leaf spring, which comes into contact with the surface of a mating mounting plate when the movable cover is closed, is integrally fixed to at least one of the mounting plates of the hinge, thereby connecting the hinges. This has the effect that the ground connection between the fixed cover and the movable cover can be reliably and stably made only by the hinge. Therefore, by using this example, the cable installation work is less troublesome than the conventional ground connection with a cable, and it is also useful in reducing costs.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment according to the present invention.

FIG. 2 is a side sectional view showing a usage example of the embodiment of FIG.

FIG. 3 is an explanatory diagram showing an operating state of the embodiment of FIG.

FIG. 4 is a side sectional view showing an example of a conventional hinge for an electric device cover.

[Explanation of symbols]

 1 movable cover 2 fixed cover 3,4,13,14 mounting plate 7,17 pin 8 leaf spring

Claims (2)

[Scope of utility model registration request] 1. A hinge for connecting a movable cover to a fixed cover of an electric device in an openable and closable manner, wherein at least one of the two mounting plates whose angle is relatively variable with a pin of the hinge as an axis. When a part of the leaf spring machined into a blade shape is integrally fixed to the surface of the mounting surface, and when the relative angle of the two mounting plates becomes approximately 90 degrees, another part of the leaf spring is At this time, the earth connection hinge of the electric device cover is configured so that it is pressed against and comes into contact with the surface of the other mounting plate that faces it. 2. A hinge for connecting a movable cover to a fixed cover of an electric device in an openable and closable manner, wherein at least one of the two mounting plates whose angle is relatively variable with a pin of the hinge as an axis. When a part of the leaf spring machined into a blade shape is integrally fixed to the surface of the mounting surface and the relative angle of the two mounting plates reaches approximately 180 degrees, the other part of the leaf spring is At this time, the earth connection hinge of the electric device cover is configured so that it is pressed against and comes into contact with the surface of the other mounting plate that faces it.