JP3111465U - Plug with safety protection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plug provided with a safety protection device.
A safety protection device is provided in the plug body, and the safety protection device includes a surge protector and a thermal fuse connected to the circuit. When the surge voltage increases suddenly in the circuit, the surge protector absorbs the surge voltage and converts it into thermal energy. When the thermal energy exceeds the cutting temperature set in the thermal fuse, the circuit is disconnected and safety protection is provided. To achieve the function. This disconnects the circuit when there is a risk that the surge voltage will melt and break the plug. Further, when the LED indication lamp is provided in the circuit and the thermal fuse is cut, the LED indication lamp is extinguished and indicates that the thermal fuse has been cut.
[Selection] Figure 1

Description

  The present invention relates to a plug having a kind of safety protection device, and more particularly to a plug having a safety protection device that uses a surge protector to absorb a surge voltage and convert it into thermal energy to control the cutting of a thermal fuse. .

  In general, when a well-known outlet becomes old, a conductive contact piece in the outlet causes a contact failure, and the plug is melted and broken by heat generation, thereby forming an electric wire fire.

  In order to prevent the occurrence of such danger, there are known inventions in which a fuse is attached to a plug, for example, Patent Documents 1, 2, and 3.

  In the above conventional technique, a fuse is directly attached on a circuit or between a conductive terminal and a wire conductive core. However, since such a technique determines whether or not to cut by the melting point of the fuse, there is a problem that it is inaccurate. Sometimes the heat generated due to poor contact of the conductive contact pieces is insufficient to blow the plug, but the fuse is already blown and may need to be replaced, which is troublesome enough.

  For this reason, the application to the plug of the safety protection device which controls cutting by temperature is a category to be discussed in the present invention.

Taiwan Patent Notice No.592398 specification Taiwan Patent Publication No. 572436 Specification Taiwan Patent Publication No. 555271 Specification

  The main object of the present invention is to provide a plug with a safety protection device, in which the safety protection device is designed in the plug body, which device has a surge protector and a thermal fuse connected to the circuit. It has. When the surge voltage increases suddenly in the circuit, the surge protector absorbs the surge voltage and converts it into thermal energy. When the thermal energy exceeds the cutting temperature set by the thermal fuse, the circuit is disconnected and safety protection is provided. Achieve function.

  Another object of the present invention is to provide a plug with a safety protection device, in which the surge protector converts the surge voltage into thermal energy and controls the thermal fuse to cut off the plug. The thermal fuse cannot be blown unless a surge voltage sufficient to blow it is determined, and is not cut when the temperature is insufficient to blow the plug. As a result, accurate security can be ensured, and there is no disadvantage that the fuse is always changed by mistakenly cut as in the known technique.

  It is another object of the present invention to provide a plug having a safety protection device, in which a receiving groove is designed in the plug body, and the surge protector and the thermal fuse are accommodated in the receiving groove so as to be adjacent to each other. . In addition, a cover is provided above the receiving groove, and the surface thereof is extended to the surface of the plug body, which is convenient for opening the cover and replacing the thermal fuse.

  In addition, in the present invention, an LED indicator lamp is provided on the circuit, and when the thermal fuse is blown, the LED indicator lamp is extinguished to indicate that the thermal fuse has been cut, so that the repairer observes the LED indicator lamp. And know the cause.

The device of claim 1 is a plug provided with a safety protection device.
A plug body comprising a pair of conductive terminals inserted into an electrical outlet to obtain a power source, and the conductive terminal pair and a wire forming a conductive connection;
When the surge protector is connected to the circuit and there is an instantaneous surge voltage surge in the circuit, the surge protector absorbs the surge voltage and converts it into thermal energy. A safety protection device that disconnects the circuit and achieves safety protection when the temperature of energy exceeds the cutting temperature set by the thermal fuse; and
It is a plug with a safety protection device, characterized by comprising
The invention of claim 2 is a plug comprising the safety protection device according to claim 1, wherein the plug body has an upper case and a lower case, the conductive terminal pair protrudes from the lower case, A housing groove is provided between the pair of conductive terminals to accommodate the surge protector and the thermal fuse so as to be adjacent to each other.
The invention of claim 3 is the plug provided with the safety protection device of claim 2, wherein the upper portion of the receiving groove is closed by a cover, and the surface of the cover is extended to the surface of the upper case so that it can be opened and closed. It features a plug with a safety protection device.
According to a fourth aspect of the present invention, there is provided a plug having the safety protection device according to the second aspect, wherein guide grooves are formed on both sides of the receiving groove, and a surge protector and a temperature fuse pin are assembled into the receiving groove from the guide groove. It is a plug with a safety protection device, characterized by being found.
The invention of claim 5 is a plug comprising the safety protection device according to claim 1, wherein an LED indicator lamp and a resistor are provided in the circuit of the safety protection device, and the LED indicator lamp is destroyed when the thermal fuse is cut. It is a plug with a safety protection device, characterized by lighting and indicating the thermal fuse blown.

  The protective measures within the plug of the present invention are controlled using temperature and therefore have accurate cutting timing and are more accurate than known techniques. The present invention fully satisfies the requirements for utility model registration.

  As shown in FIGS. 1 to 3, the present invention comprises two parts, a plug body and a safety protection device.

  Among them, the plug body includes an upper case 10 and a lower case 20. A conductive terminal pair 30 is provided in a closed case formed by the upper case and the lower case, and the ends thereof are inserted into the outlet through the lower case 20 to acquire power. The conductive terminal pair 30 is fixed to the insulating base 40 to ensure non-contact of the terminals. The electric wire 50 is connected from the rear end of the case, and the conductive core wire and the terminal form a conductive connection. A screw 60 is screwed from below the lower case 20 to couple the upper case 10 and the lower case 20 together.

  According to the present invention, a safety protection device is provided between the conductive terminal pair 30 and the electric wire 50 in the case. The safety protection device comprises a surge protector 70 and a thermal fuse 80. The surge protector 70 and the thermal fuse 80 are provided in a receiving groove 90 extending from the inside of the lower case 20, and the surge protector 70 and the thermal fuse 80 are attached so as to be adjacent to each other.

  As shown in FIGS. 1 and 3, a cover 91 is provided above the accommodation groove 90 to seal the accommodation groove 90. The surface of the cover 91 is extended into the hole 101 on the surface of the upper case 10, and the temperature fuse 80 can be replaced by opening the cover 91. In addition, guide grooves 92 are formed on both sides of the housing groove 90, and the pins of the surge protector 70 and the thermal fuse 80 are assembled into the housing groove 90 from the guide groove 92. With such a design, the cover 91 can be opened and closed on the outer surface of the upper case 10, which is convenient for replacing the thermal fuse 80.

  It should be noted that: In the present invention, the surge protector 70 and the thermal fuse 80 are mounted adjacent to each other using the receiving groove 90. When the surge voltage increases suddenly in the circuit, the surge protector 70 absorbs the surge voltage and converts it into thermal energy. When the thermal energy exceeds the cutting temperature set by the thermal fuse 80, the circuit is disconnected. Achieve the safeguarding function. Please refer to the electrical circuit diagram of FIG. The electrical circuit of the present invention is provided with an LED indicator lamp 81 and a resistor 82, and when the thermal fuse 80 is cut, the LED indicator lamp 81 is extinguished to indicate that the thermal fuse 80 has been cut. The cause can be known by observing the LED indicator lamp.

  The cutting temperature of the thermal fuse 80 can be set to 139 degrees Celsius, which is lower than the melting point temperature of the plastic case, and can ensure safety. When the temperature of the thermal energy generated by the surge voltage exceeds the set temperature, the thermal fuse 80 cuts the circuit, thereby achieving an accurate control result.

  In addition, the pins of the surge protector 70 and the thermal fuse 80 are assembled into the housing groove 90 from the guide groove 92 by the guide grooves 92 opened on both sides of the housing groove 90. This design is convenient enough to replace the thermal fuse 80.

It is an exploded view of the present invention. FIG. It is sectional drawing of this invention. It is an electric circuit diagram of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Upper case 20 Lower case 30 Conductive terminal pair 40 Insulation base 50 Electric wire 60 Screw 70 Surge protector 80 Thermal fuse 81 LED indicator lamp 82 Resistance 90 Housing groove 91 Cover 92 Guide groove

Claims (5)

For plugs with safeguards,
A plug body comprising a pair of conductive terminals inserted into an electrical outlet to obtain a power source, and the conductive terminal pair and a wire forming a conductive connection;
When the surge protector is connected to the circuit and there is an instantaneous surge voltage surge, the surge protector absorbs the surge voltage and converts it into thermal energy. A safety protection device that disconnects the circuit and achieves safety protection when the temperature of energy exceeds the cutting temperature set by the thermal fuse; and
A plug with a safety protection device, characterized by comprising   2. The plug having the safety protection device according to claim 1, wherein the plug body includes an upper case and a lower case, the conductive terminal pair protrudes from the lower case, is in the lower case, and is accommodated between the electric wire and the conductive terminal pair. A plug provided with a safety protection device, characterized in that a surge protector and a thermal fuse are accommodated adjacent to each other with a groove.   3. The plug having the safety protection device according to claim 2, wherein the upper portion of the housing groove is closed by a cover, and the surface of the cover is extended to the surface of the upper case so as to be freely opened and closed. With a plug.   3. The plug having the safety protection device according to claim 2, wherein guide grooves are provided on both sides of the housing groove, and a surge protector and a temperature fuse pin are assembled into the housing groove from the guide groove. Plug with safety protection device. The plug having the safety protection device according to claim 1, wherein when the LED indicator lamp and the resistor are provided in the circuit of the safety protection device and the thermal fuse is cut, the LED indication lamp is extinguished and the thermal fuse is cut. A plug equipped with a safety protection device, characterized by displaying.

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