JPS6021902Y2 - Fixing devices for electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plug-shaped fixing device for electrical equipment that supplies power to a load, which has a built-in earth leakage breaker.

Conventionally, electrical equipment bodies such as plugs with built-in earth leakage circuit breakers are used by inserting the plug blade into an outlet that protrudes from one side of the electrical equipment body, but the electrical equipment bodies are relatively heavy. If you just plug the plug blade into an outlet, the plug blade will come off and the electrical device will fall.

Therefore, when fixing the main body of an electrical device, use the mounting screw part of the plate in front of the outlet, remove this screw once, attach the fixing frame for fixing the main body of the electrical device to the plate first, and then attach the plate to the outlet. After attaching the device to the front of the device with screws, the main body of the electrical device was fixed with a fixing frame.

However, there was a problem that it could not be used for screwless plates.

The present invention has been proposed in view of the above-mentioned points, and provides a fixing device for electrical equipment, which is capable of fixing even a screwless plate outlet to an electrical equipment body plugged into the outlet using a fixing frame. It is something.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an exploded perspective view of an indoor type electrical equipment body 1 having a built-in earth leakage breaker.

Reference numeral 2 denotes a flat rectangular body with an open top surface, and a main body cover 3 and a terminal cover 4 are arranged and covered on the top surface of the body 2.

A lower step portion 5a having a flat upper surface and projecting laterally is formed on the outer edge of the upper surface of the body 2.

An upper step portion 5b corresponding to the lower step portion 5a is protruded from the outer peripheral edge of the lower surface of the main body cover 3 and the terminal cover 4, respectively.

The opposing surfaces of the lower and upper parts 5a and 5b are both flat,
Lower, upper section 5a.

A U-shaped elastic waterproof packing 6 is attached between the parts 5b to make the electrical equipment main body 1 waterproof, and protrudes from the center around the electrical equipment main body 1 as shown in FIG. It has the shape of the stepped section 5.

In addition, since the lower and upper portions 5a and 5b have a wide width that projects laterally, the waterproof gasket 6 also has a wider width, thereby further improving waterproofness.

Reference numeral 8 denotes a power terminal board, and one end thereof is integrally formed with a plug blade 7 that protrudes from the bottom surface of the body 2 and is inserted into an outlet.
An elastic contact spring 9 is integrally formed at the other end.

The power terminal plate 8 is fixed to the body 2 with screws 45.

A movable contact 10 is fixed to the lower surface of the contact spring 9.

A fixed contact 12 corresponds to the movable contact 10 and is fixed to the upper surface of the fixed terminal plate 11.

14 is a load terminal board connected to the power supply line 27 on the load side;
The load terminal plate 14 and the fixed terminal plate 11 are connected to the zero-phase current transformer 1.
They are connected by a lead wire 13 with a lead wire 5 interposed therebetween.

The zero-phase current transformer 15 detects electrical leakage, and its secondary output is input to the amplifier block 16.

Reference numeral 2B denotes a notch cut out at the end of the body 2 and the terminal cover 4, and is used for inserting the power line 27. In the case of the type with the plug blade 7 protruding, one notch 28 is not used, so the end cap 29 is not used. Keep it covered.

17 is a trip block, and the trip mechanism is insulated body 1
8 is placed in the frame 19.

When the trip mechanism is in a so-called set state, the contact plate 20 moves downward and presses the contact spring 9, thereby fixing the movable contact 10 and the fixed contact 12.

Reference numeral 21 denotes a tripping coil. The tripping coil 21 is excited by the output of the amplifier block 16, and by attracting and driving the plunger, the tripping plate 30 is driven to perform a tripping operation.

When the tripping operation is performed, the abutment plate 20 moves upward, the contact spring 9 returns, and both contacts 10, 12 open.

22 is a set button, which sets the trip mechanism in a set state, and 23 is a test button.

This test button 23 is for forcibly exciting the tripping coil 21, and is used to test the tripping mechanism.

The set button 22 and the test button 23 are inserted and held through opening windows 25 and 26 of the holding cover 24 which is held between the ends of the terminal cover 4 and the main body cover 3.

In FIG. 2, reference numeral 37 denotes a fixed frame made of elastic synthetic resin, which is composed of a U-shaped arm portion 34 for holding the electrical equipment main body 1, and a pedestal 36 for fixing the fixed frame 37 itself. ing.

The arm portion 34 and the base 36 are integrally formed, and the arm portion 34 has three claw portions 38a and 38 on both sides, respectively.
b is provided protrudingly.

One upper claw part 38a is formed with a semicircular cross section, and two lower claw parts 38b are formed with a triangular cross section.

The upper and lower claw portions 38 a and 38 b engage with the stepped portion 5 protruding from the peripheral side of the electrical equipment main body 1 .

The dimensional height H2 of the arm part 34 of the fixed frame 37 is lower than the dimensional height H□ of the electrical equipment main body 1, or is equal to the dimensional height H2.

This has a good appearance as there is no protruding part that exceeds the height of the terminal cover 4 of the electrical equipment main body 1, and even when a display element is provided on the top surface of the terminal cover 4, the arm part 34
It cannot be hidden by

The pedestal 36 is formed in a triangular shape, and a screw hole 35 for screw insertion is bored in the center thereof.

Reference numeral 31 denotes an outlet provided in the construction material, which has an outlet 33 in the center and a plate 32 attached to the front.

The rear surface of the pedestal 36 of the fixed frame 37 comes into contact with the front surface of the construction material below the plate 32 and is screwed into the construction material through the screw hole 35, thereby fixing the fixed frame 37 to the construction material.

Here, when the plug blade 7 of the electrical equipment main body 1 is inserted into the outlet 33 of the outlet 31, the stepped portion 5 of the electrical equipment main body 1 climbs over the claw portion 38a of the fixing frame 37, and the lower surface of the stepped portion 5 is directed downward. As shown in FIG. The electrical equipment main body 1 is supported by the fixing frame 37 and fixed.

Reference numeral 39 denotes a notch 39 with an open top surface for allowing the power supply line 27 to escape.

The electrical device main body 1 can be easily attached to and detached from the fixed frame 37 because the fixed frame 37 is made of synthetic resin.

FIG. 4 shows a circuit diagram of the electrical equipment main body 1, A shows a leakage detection block, a zero-phase current transformer 15 and an amplifier block 1.
It consists of 6.

Normally, the contact spring 9 is pressed and power is supplied from the plug blade 7 to the load connected via the load terminal plate 14.

40 is a surge absorber, and 41 is an energizing lamp.

When a leakage occurs, an output is generated on the secondary side of the zero-phase current transformer 15, turning on the thyristor 42 and driving the tripping coil 21.

Then, the contact spring 9 is returned to its original position to cut off the power supply.

As described above, the present invention forms a step that protrudes laterally on the outer surface of the electrical equipment main body, and is opened along the outer peripheral surface of the electrical equipment main body in a direction substantially perpendicular to the protruding direction of the plug blade. A fixing frame is formed of a roughly U-shaped arm and a pedestal that is formed integrally with the arm and has a screw hole for screwing into the construction material to which the outlet is attached. Since a claw part that engages with the stepped part is protruded from the inner surface of the arm part of the fixed frame, relatively heavy electrical components can be stored, and the plug blade can be protruded from one end of the main body of the electrical equipment. By supporting the main body of the electrical device with the fixing frame when the electrical device is plugged into the outlet, it is possible to prevent the main body of the electrical device from being installed at an angle with respect to the outlet. Since it is fixed to the construction material by screws that are screwed through and into the construction material, in the case of an outlet with two or more outlets, the plug blade of the electrical equipment main body can be inserted into any outlet. It is good, and as a result,
This has the advantage that the electric device can be attached without tilting the main body of the electric device and without blocking unused outlets in the main body of the electric device, and the outlets can be used effectively.

In addition, when the fixed frame is fixed to construction materials, the screw holes are exposed without being hidden by the electrical equipment body, so the mounting position of the fixed frame can be adjusted according to the outlet into which the electrical equipment is inserted. This has the advantage that the fixed frame can be fixed to the construction material after the fixing, and the mounting position of the fixed frame can be set at an optimal position.

Further, the stepped portion on the outside of the electrical equipment main body engages with the claw portion on the inner surface of the arm of the fixed frame, and this engagement holds and fixes the electrical equipment main body to the fixed frame. The fixing frame has the advantage that it is not necessary to use the mounting screws of the outlet plate as in the past, and the fixing frame can be used regardless of the screws on the plate. Since no extra force is applied to the plate, there is no chance of the outlet becoming loose due to loosening of the plate, and since the main body of the electrical equipment is fixed with a fixed frame, even relatively heavy items will not fall from the outlet. It has the advantage of being safe to use.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the main body of an electrical device according to an embodiment of the present invention;
FIG. 2 is an exploded perspective view of the same as the above, FIG. 3 is a sectional view showing a state in which the main body of the above electric device and a fixed frame are held, and FIG. 4 is a circuit diagram of the main body of the above electric device. Reference numeral 1 designates the main body of the electric device, 5 a stepped portion, 7 a plug blade, 31 an outlet, 34 an arm portion, 35 a screw hole, 36 a pedestal, 37 a fixing frame, and 38 a claw portion.

Claims (1)

[Scope of utility model registration request] An electrical device in which a plug blade is provided protruding from one side of the electrical device body, the plug blade is inserted into an outlet formed in a construction material, and power is supplied from the outlet to the electrical device body through the plug blade. , a substantially U-shaped chest with a stepped portion projecting laterally on the outer surface of the electrical equipment main body, and an approximately U-shaped chest opening along the outer peripheral surface of the electrical equipment main body in a direction substantially perpendicular to the protruding direction of the plug blade. The inner surface of the arm of this fixed frame forms a fixed frame, which is formed integrally with this arm and has a pedestal with screw holes for screwing into the construction material to which the outlet is attached. A fixing device for an electrical device, characterized in that a claw portion protruding from the step portion engages with the stepped portion.