JPS6021903Y2 - Structure of electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of an electrical device that is plug-shaped and has a built-in earth leakage breaker and supplies power to a load.

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 electrical equipment main body, a U-shaped fixing frame is used to engage the electrical equipment main body from the top surface.

Therefore, since the central part of the U-shaped fixing frame comes into contact with the top surface of the electrical equipment body, there is a problem that if there is a display section on the top surface, it is partially hidden and cannot be seen, and the top surface of the electrical equipment body There was a problem in that the hooks on both arms of the fixed frame were partially protruding and were inferior in terms of design.

The present invention has been proposed in view of the above-mentioned points, and even if a fixing frame is used to prevent the electrical equipment itself from falling when it is plugged into an outlet, it will still look good in terms of appearance and design. The purpose is to provide a structure for electrical equipment that does not hide the

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 that is divided into two parts and has an open top surface, and a main body cover 3 and a terminal cover 4 are placed side by side on the top surface of the body 2.

The body 2, main body cover 3, and terminal cover 4 constitute a case of the electrical equipment main body 1.

A lower step portion 5a, which is a flange with a flat upper surface and projects laterally, is formed on the outer edge of the upper surface of the body 2.

An upper step portion 5b serving as a flange corresponding to the lower step portion 5a is provided projecting 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 portions 5a and 5b are both flat, and are wider than the thicknesses of the body 2, main cover 3, and terminal cover 4.

A U-shaped elastic waterproof packing 6 is interposed between the lower and upper parts 5a and 5b.
The width is the lower and upper part 5a.

It is approximately the same as the opposing surface of 5b.

The waterproof gasket 6 is provided with screw fixing portions 44 at five locations, each corner and the center of the central piece, in order to ensure more complete waterproofing. 44 under the double force bar 3.4, the upper part 5
The opposing surfaces of a and 5b are brought into close contact.

In this way, the electrical equipment main body 1 is made waterproof, and the waterproof gasket 6, lower and upper parts 5a and 5b have a stepped portion 5 protruding from the periphery center of the electrical equipment main body 1 as shown in FIG. is formed.

Further, since the lower and upper portions 5a and 5b are formed to be wide and protrude laterally, the waterproof gasket 6 also has a correspondingly wider width, thereby further enhancing 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.

Power terminal plate 8 is fixed to 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 28 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 a 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 34 for holding the electrical equipment main body 1, and a pedestal 36 for fixing the fixed frame 37 itself. has been done.

The arm portion 34 and the base 36 are integrally formed, and each side of the arm portion 34 has three claw portions 38a:
3ab 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 38a and 38b 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 part that protrudes beyond the height of the terminal cover 4 of the main body of the electrical equipment, and even if a display element is provided on the top surface of the terminal cover 4, it will not be hidden by the arm portion 34. be.

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 is a notch opening at the top for allowing the power 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, and 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 mentioned above, the present invention has a plug blade protruding from one side of the electrical equipment body, inserts the plug blade into a socket made of construction material, and supplies power to the electrical equipment body from the outlet through the plug blade. In the electrical equipment to be supplied, the case of the main body of the electrical equipment is divided into two parts, and a flange protruding outward is formed on the opposing circumferential edge of the body and the case, and a waterproof packing is provided on the opposing face of the flange. Attach one end to the construction material provided with the electrical outlet, engage the flange of the electrical equipment main body with the substantially U-shaped arm of the other end, and connect both sides of the electrical equipment main body. It takes the form of a fixed frame that holds and fixes the electrical equipment main body, and the height of the arms of the fixed frame is equal to or smaller than the thickness of the electrical equipment main body, so the electrical equipment main body The case is divided into two parts, and a flange protruding outward is formed on the opposing circumferential edges of the case and the body, and a waterproof packing is interposed on the opposing surface of this flange. When closing the case, the opposing peripheral edges of the body and case protrude outwards, making the width wider. Therefore, the waterproof gasket can also be made wider, increasing waterproofness and making it wider. This has the advantage of making it easier to sandwich the waterproof gasket, and by engaging and holding the flange of the electrical equipment body with the arms of the fixed frame, the flange can be used not only for waterproofing purposes, but also for holding purposes. The flange is functional;
In this way, one flange has the advantage of having two functions: waterproofing and holding.

In addition, one end is attached to a construction material provided with an outlet, and the approximately U-shaped arms at the other end are used to form a fixing frame that holds and secures both sides of the electrical equipment body. The height of the arm of the fixed frame is made to be equal to or smaller than the thickness of the main body, so even if the fixed frame is used to prevent the main body of an electrical device plugged into an outlet from falling, the fixed frame Since the upper portions of both arms do not protrude above the upper part of the electrical equipment main body, it is aesthetically pleasing and has the advantage that even if the display part is provided on the upper surface of the electrical equipment main body, the display part will not be hidden.

[Brief explanation of drawings]

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. 1 is the main body of the electric device, 2 is the body, 3 is the main body cover, 4 is the terminal cover, 6 is the waterproof gasket, 7 is the plug blade, 31 is the outlet, 34 is the arm, and 37 is the fixing frame.

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 electric device body through the plug blade, A structure in which an outwardly protruding flange is formed on the opposing circumferential edges of the body and the case, in which the case of the main body of the electrical equipment is divided into two, and a waterproof gasket is interposed on the opposing surface of the flange, and an outlet is provided. Attach one end to the material, engage the flange of the electrical equipment main body with the substantially U-shaped arm of the other end, and hold and fix the electrical equipment main body by holding both sides of the electrical equipment main body. A structure of an electrical device, characterized in that the height of the arms of the fixed frame is equal to or smaller than the thickness of the main body of the electrical device forming the fixed frame.