KR101157092B1 - Temperature Fuse Protection Device - Google Patents

Abstract

The present invention relates to a thermal fuse protection device, wherein the circuit is completed using a high melting point metal capable of riveting two separate terminals of the circuit to be electrically connected. When no external force is applied, a space exists between the two free ends of the two terminals. When electrical overloading or high temperature circuits occur, the high melting point metal is heated to melt and cut, thereby disconnecting the two free ends of the two terminals and turning the circuit "off".

High melting point metal, thermal fuse protectors, rivets

Description

Temperature Fuse Protection Device

1 is an assembled cross-sectional view showing an "on" state of a general circuit protection mechanism.

2 is an assembled cross-sectional view showing an "off" state of a general circuit protection mechanism.

3 is an exploded cross-sectional view according to a first embodiment of the present invention.

4 is an assembled sectional view according to the first embodiment of the present invention.

FIG. 5 is an assembled cross-sectional view showing a circuit of a high melting point metal broken, two free ends of two terminals, and a "off" state in the case of an electrical overloading or a high temperature circuit. FIG.

Figure 6 is a perspective perspective view showing another form of a high melting point metal according to an embodiment of the present invention.

7 is an assembled perspective view of the first embodiment according to the present invention;

8 is an exploded cross-sectional view showing a second embodiment of the present invention.

9 is an assembled sectional view according to the second embodiment of the present invention.

FIG. 10 is an assembled cross-sectional view showing a circuit of a high melting point metal broken, two free ends of two terminals, and a " off " state in the case of electrical overloading or a high temperature circuit. FIG.

11 is a perspective perspective view showing another form of the high melting point metal of the second embodiment;

12 is an assembled perspective view of a second embodiment according to the present invention;

13 is an exploded cross-sectional view showing a third embodiment of the present invention.

14 is an assembled perspective view of the third embodiment of the present invention;

15 is an assembled sectional view showing a third embodiment of the present invention.

FIG. 16 is an assembled cross-sectional view showing a circuit of a high melting point metal broken, two free ends of two terminals, and a "off" state in the case of electrical overloading or a high temperature circuit. FIG.

<Description of the symbols for the main parts of the drawings>

13: high melting point metal 11, 12: terminal

111, 121: through hole 131: loop-shaped recess

The present invention relates to a temperature protection device, and more particularly, to connecting two separate terminals in one circuit so that the two terminals are electrically connected to the circuit, so that the high melting point metal under heating and elevated temperature The invention relates to a temperature fuse protection device using a high melting point metal for riveting which causes the circuit to be turned off so that the circuit is turned off.

Electricity has become a necessity in modern society and is pervasive in all our lives. The IT industry, home, transportation, education, and entertainment all rely heavily on electricity. Therefore, the safe use of electricity has become even more important.

In general, the entire circuit is set with the main switch "on" in the power plant. In the case of electrical overloading, short circuits, or high temperature circuits, the fuse is melted or the circuit breaker is jumped to protect the safety of the electrical system.

In addition, the entire circuit further has switches for controlling the respective circuits in the "on" or "off" state with several branch circuits. To increase safety during operation, many switches have the ability to automatically jump off-line when overloading or high temperature circuits occur, which could result in electrical fires due to the inability of the fuses or circuit breakers to react in a timely manner. To prevent this.

In addition to using the above mentioned branch circuits, circuit breakers or switches in the entire circuits, and fuses for circuit protection when overloading occurs, many individual electrical appliances such as expensive electronics, data processing equipment or electrical heating appliances. The products are equipped with temperature sensing circuit breakers for circuit protection. When the entire circuit is overloaded or the circuit temperature is too high, the power is shut off by means of instantaneous temperature sensing, so that each individual electrical, electronic product or equipment is protected and saved from destruction, This prevents overloading or high temperature circuitry from occurring in the branch circuits to the extent that other electrical equipment cannot operate in the overall circuit.

A traditional temperature sensing circuit breaker installed in an individual electronic product has the following structure (shown in FIGS. 1 and 2), which can be modified to bend in the opposite direction from the original shape and be deflected when heated. A contact spring 201 is provided. One end of the contact spring 201 is an attachment assembly in which the first terminal 202 is formed. The other end of the contact spring 201 is a preend, and the preend assembly is formed with a first conduction point 203. The attachment assembly at the second terminal 204 is formed with a second conduction point 205 that coincides with the first conduction point 203. During use, the contact spring 201 is bent in the direction of the second terminal such that the first conduction point 203 is located at the free end of the contact spring 201 so that the circuit is connected. Contact the second conduction point 205 at (FIG. 1). When electrical overloading occurs, the contact spring 201 is deflected due to high temperatures by bending in the opposite direction and deforming its original shape, the contact spring 201 being detached from the second conduction point 205. By placing the first conduction point 203 at the free end, the circuit is in the " off " state as shown in FIG. 2 to prevent the electrical appliance from being destroyed. However, the conventional temperature sensing circuit breaker has several drawbacks as follows.

(a) During manufacture of the contact springs 201, it is not possible to ensure that all the contact springs 201 have the same thickness, curvature and structural characteristics. Therefore, in the deflection due to the high temperature, it is difficult to control the reaction temperature in which the contact spring 201 is bent in the opposite direction to the original direction, so that the tolerance of the reaction temperature is substantially large.

(b) The degree of deformation or deformation accuracy of the contact springs when bent in the opposite direction as much as due to the high temperature is relatively low and thus prevents the electronics from timely damage during instantaneous electrical overloading. It becomes impossible.

(c) the contact spring 201 does not always deform as desired so that the protection mechanism is triggered during instantaneous electrical overloading, as it may not be fully bent or deflected, or may not be deflected in a timely manner; Thus, the terminals remain in an electrically conducting state, so that circuit temperatures of high temperature for the entire circuit and for each individual electronic product lead to dangerous operating conditions.

(d) When overloading occurs, the contact spring 201 partially bends or deflects to jump when hot and then reconnect the circuit when the contact spring temperature drops. Repeated " turn-on " and " turn-off " as described above are likely to cause sparks and can be dangerous. Because of the repeated turn on and off of the power circuit, the electronic electrical appliances experience unstable electrical currents, resulting in device destruction, or inoperable operation, reduced service life, and even complete failure.

It is therefore an object of the present invention to overcome the shortcomings of conventional temperature sensing circuit breakers for individual electronics, which cannot accurately and effectively set the reaction temperature for power cutoff, and to recover the contact springs to reconnect the circuit in several ways. Its purpose is to provide a thermal fuse protection device that prevents the low lifespan and unstable operation even leading to complete destruction.

According to an aspect of the present invention for achieving the above objects, there is provided a thermal fuse protection device using a high melting point metal that can be riveted and connected to two separate terminals of a circuit to be electrically connected. It is done. When no external force is applied, the space between the two free ends of the two terminals remains to be one space. In the case of electrical overloading or high temperature circuits, the circuit will be “off” by breaking the high melting point metal and disconnecting the two free ends of the two terminals. As a result, stability due to the use of electricity is ensured.

It is another object of the present invention to utilize the properties of the high melting point metal to ensure that it melts and breaks so that the circuit is reliably "off" so that the contact spring is bounced without worrying about fluctuations in circuit temperature. It is to avoid contact with the circuit to be connected by bouncing and deflecting again and again. As a result, the electricity use stability is again guaranteed.

Yet another object of the present invention is to provide a riveting method using a high melting point metal to connect two separate terminals of a circuit, thereby providing a simple structure, improved manufacturability, reduced volume, and cost efficiency. Has an advantage.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings and the following description are by way of example only and are intended to assist those of ordinary skill in the art to understand the present invention. Therefore, the following descriptions should not be used to limit the scope of the present invention.

3 and 4 are exploded cross sectional and assembled cross sectional views showing a first embodiment constructed according to the present invention, respectively. FIG. 5 is an assembled cross-sectional view showing a circuit of a high melting point metal broken, two free ends of two terminals, and an "off" state in the case of an electrical overloading or a high temperature circuit. The thermal fuse protection device according to the invention comprises two terminals 11, 12 and a high melting point metal 13. The attachment assembly for the two terminals 11, 12 can be installed in the circuit, and the free ends of the two terminals 11, 12, respectively, which are kept in space ΔS1 between them when no external force is applied, respectively. Through holes 111 and 121 that can be formed are formed. The through hole may have a closed or open structure, and at least one of the terminals is made of an elastic electrically conductive material to have elasticity.

The high melting point metal is in the form of a strip and has braking properties (rupture properties) at heated or elevated temperatures. The composition of the high melting point metal may vary depending on the required high melting point breaking temperature. The middle portion of the high melting point metal 13 is formed with at least one loop-concave neck portion 131 and the cross section of the recess 131 is smaller than the cross section of the other portion. It is.

When assembled, a suitable length of the high melting point metal passes through the through holes 111, 121 of the free ends of the two terminals 11, 12. Then, using an impacting riveting method, both ends of the high melting point metal will have to be expanded. The high melting point metal then reliably connects the free ends of the two terminals 11 and 12 which are electrically connected, which are separated and are not in contact with each other. There is still a space ΔS2 between the free ends of the two terminals 11, 12, which is shorter than the space ΔS1 (shown in FIG. 4).

In the event of an overloading or high temperature circuit, the high melting point metal 13 will heat up to reach a setting temperature. Since the loop-shaped concave portion 131 has the smallest cross section and the highest temperature, it melts and breaks first, which causes the two terminals 11 and 12 to be disconnected and the circuit is “off”. (Shown in FIG. 5).

Referring to FIG. 6, FIG. 6 has a high melting point metal having an end cap having an extended cap shape and an intermediate part having at least one loop-shaped recess 141 having the same effect as described in FIG. 3. 14 shows another form.

8 and 9 are exploded cross-sectional and assembled cross-sectional views showing a second embodiment of the present invention. Fig. 10 is an assembled cross-sectional view showing a circuit of the high melting point metal, the two free ends of the two terminals and the "off" state in the case of electrical overloading or a high temperature circuit. The principle of operation for this embodiment is similar to that of the first embodiment above.

The thermal fuse protection device comprises two terminals 11, 12 and a high melting point metal 15. The attachment assembly for the two terminals 11, 12 can be installed in the circuit and between the free ends of the two terminals 11, 12, which are kept in space ΔS3 between them when no external force is applied. The through holes 111 and 121 are formed to penetrate, respectively. The through hole may have a closed or open structure, at least one of the terminals being made of an elastic electrically conductive material to have elastic properties, or an elastic unit (not shown in the drawing), the two terminals It is mounted on at least one of the two terminals using the elasticity of the elastic unit for maintaining the separation elasticity between the free ends of 11 and 12.

The high melting point metal is in the form of a strip and has braking properties (rupture properties) at heated or elevated temperatures. The composition of the high melting point metal may vary depending on the required high melting point breaking temperature.

When assembled, a suitable length of the high melting point metal 15 passes through the through holes 111, 121 of the free ends of the two terminals 11, 12. Later, while the high melting point metal 15 is being supported to electrically connect the free ends of the two separate terminals 11 and 12, impacts both ends of the high melting point metal 15 to expand. A riveting method is applied.

The free ends of the two terminals 11, 12 are adjacent to each other inward, so that there is elasticity separating them outwardly (shown in FIG. 9).

12, FIG. 12 is an assembled perspective perspective view of a second embodiment according to the present invention.

Referring to FIG. 11, FIG. 11 is a perspective perspective view showing another form of the high melting point metal 16 of the second embodiment, one end having an expanded cap shape and the assembly mode of which is the high melting point of FIG. Same as metal.

When electrical overloading or high temperature circuits occur, the high melting point metal 15 will melt and break when reaching the set temperature. The free ends of the two terminals 11, 12 lose the riveting force given by the high melting point metal 15 and are then separated from each other because of the counteracting force by the elastic force so that they are disconnected from each other and the circuit is " Off "state (shown in FIG. 10).

13 to 15 are exploded cross sectional views, an assembled perspective perspective view, and an assembled sectional view, respectively, illustrating a third embodiment of the present invention. FIG. 16 is an assembled cross-sectional view showing the circuit of the high melting point metal, the separation of the two free ends of the two terminals and the "off" state in the case of an electrical overloading or a high temperature circuit. The principle of operation for this embodiment is similar to that of the second embodiment.

The thermal fuse protection device according to the third embodiment of the present invention includes two terminals 11 and 12, a high melting point metal 15, and an elastic connection unit 18. The attachment assembly for the two terminals 11, 12 can be installed in one circuit, and a through hole 121 is formed through which at least one free end of the two terminals can pass. For this embodiment, the through hole 121, which may be in an open or closed configuration, is located at the free end of the first terminal 12. An attachment piece 112 is formed at the free end of the second terminal 11, and is maintained in the space ΔS4 between the two free ends of the terminals 11 and 12 when no external force is applied. .

The high melting point metal is in the form of a strip and has braking properties (rupture properties) at heated or elevated temperatures. The high melting point metal 17 can have one end with an extended cap shape, and the composition of the high melting point metal can be varied as required for different high melting point breaking temperatures.

The elastic connection unit 18 is used to electrically connect the two terminals 11 and 12. The elastic connecting unit 18 is made of a conductive material and consists of two connecting bars 181, 182. At least one end of the two connecting bars is formed with one open hole to allow penetration. For this third embodiment the open hole 1810 is located at the end of the first connecting bar 181. The second connecting bar 182 is in the form of a strip.

When assembled, a suitable length of the high melting point metal 15 is through hole 121 at the open end 1810 at the end of the first connecting bar 181 and at the preend of the first terminal 12. Through) Using a riveting method of impacting both ends of the high melting point metal, the two ends will be extended, and the preend of the first terminal 12 will be connected to the first connecting bar of the elastic connecting unit 18. 181 is connected. In addition, when the second connecting bar 182 of the elastic connecting unit 18 is pressed against the first connecting bar 181, it is tightly fitted. The attachment piece 112 at the free end of the second terminal 11 is used to connect the end of the second connecting bar 181 by enclosing the perimeter to fit snugly and to be coupled together. . Both terminals 11, 12 are then electrically connected and the ends of both connecting bars 181, 182 of the elastic connection unit 18 support each other to generate an elastic force outwardly (shown in FIG. 16).

Referring to FIG. 15, when electrical overloading or high temperature circuits occur, the high melting point metal 17 will melt and break when reaching the set temperature. The first connecting bar 181 of the elastic connecting unit 18 loses the riveting force generated by the high melting point metal 17 and the two terminals 11 and 12 and then uses an elastic force acting outward to each other. As they separate they will be disconnected from each other and the circuit will be in the "off" state (shown in Figure 16).

Based on the above, the above-described embodiments of the modular structure and the dynamic relations should not only have various practical effects but also be the effect and progress of an unprecedented new design. Owns elements consistent with patent law

Although the present invention has been described with reference to the above preferred embodiments, it will be apparent that various modifications and changes may be made without departing from the scope of the invention as intended by the claims appended hereto. It will be apparent to those skilled in the art.

As described above, in the case of the electrical overloading or the high temperature circuit, the high melting point metal is broken so that the two free ends of the two separated terminals are disconnected, thereby ensuring the stability due to the use of the electric circuit. Stability of the electricity is also ensured without worrying about temperature fluctuations or by the contact springs bouncing and deflecting again and again so that the circuits are not reconnected. Providing a riveting method using a melting point metal thus has advantages and effects in simple structure, improved manufacturability, reduced volume, and cost efficiency.

Claims (20)

A thermal fuse protection device comprising two terminals and a high melting point metal; An attachment assembly for the two terminals is installed in the circuit and each of the free ends of the two terminals is formed with one through hole to allow penetration and between the free ends of the two terminals when no external force is applied. Space is maintained, The high melting point metal is in the form of a strip and has characteristics of breaking at heated or elevated temperatures, When assembled, the high melting point metal penetrates the through hole in the free ends of the two terminals and is separated by allowing the high melting point metal to be fixed using a riveting method that impacts the high melting point metal. Electrically connecting the preends of the two terminals, And a space exists without contact between the preends of the two terminals. The method of claim 1, And said through holes of said two terminals have a closed structure. The method of claim 1, And said through holes of said two terminals have an open structure. The method of claim 1, At least one of said two terminals is made of an elastic electrically conductive material such that said terminals are elastic. The method of claim 1, Wherein said high melting point metal composition is varied in accordance with a desired high melting point metal burst temperature. The method of claim 1, The intermediate portion of the high melting point metal thermal fuse protection device, characterized in that formed at least a loop-shaped recess. The method of claim 1, One end of the high melting point metal has an extended cap shape. A thermal fuse protection device comprising two terminals and a high melting point metal; An attachment assembly for the two terminals is installed in the circuit and each of the free ends of the two terminals is formed with one through hole to allow penetration and between the free ends of the two terminals when no external force is applied. Space is maintained, The high melting point metal is in the form of a strip and has a breaking property (breaking property) at a heated or elevated temperature, When assembled, the high melting point metal penetrates through the through hole in the free ends of the two terminals, and then the high melting point metal is fixed by using a riveting method that impacts the high melting point metal, thereby separating it. Electrically connect the preends of the two terminals, And said preends of said two terminals have an elastic force inwardly contacting each other and separating outwardly therebetween. 9. The method of claim 8, And said through holes of said two terminals have a closed structure. 9. The method of claim 8, And said through holes of said two terminals have an open structure. 9. The method of claim 8, At least one of said two terminals is made of an elastic electrically conductive material such that said terminals are elastic. 9. The method of claim 8, At least one of the two terminals is formed with an elastic unit for utilizing the elastic force of the elastic unit such that the free ends of the two terminals maintain opposite elasticity therebetween. 9. The method of claim 8, Wherein said high melting point metal composition is varied in accordance with a desired high melting point metal burst temperature. 9. The method of claim 8, One end of the high melting point metal has an extended cap shape. A thermal fuse protection device comprising two terminals, a high melting point metal and an elastic connection unit; An attachment assembly for the two terminals is installed in the circuit, and at least one free end of the two terminals is each formed with one through hole allowing the penetration and between the free ends of the two terminals when no external force is applied. Space is preserved, The high melting point metal is in the form of a strip and has a breaking property (breaking property) at a heated or elevated temperature, The elastic connection unit includes two connection bars and connects the two terminals to be electrically connected, at least one of the two connection bars is formed with an open hole therethrough; When assembled, the length of the high melting point metal is passed through the open hole at the end of the first connecting bar and the through hole at the free end of the first terminal, Using a riveting method of impacting the high melting point metal, the two ends of the high melting point metal are extended and connect the preend of the first terminal to the first connecting bar of the elastic connecting unit, Pressing the second connecting bar against the first connecting bar tightly fits and couples together, and the terminals of both connecting bars of the elastic connecting unit and the ends of the connecting bar of the elastic connecting unit to form an electrical connection adjacent to each other and to the outside elastic force Thermal fuse protector, characterized in that the action. The method of claim 15, The free end of the second terminal of the two terminals is formed with an attachment piece, the second connecting bar of the elastic connecting unit is in the form of a strip, and the second connecting bar of the elastic connecting unit against the first connecting bar. A tight fit is achieved by pressing and using a mounting piece of the second terminal to surround and fix the end of the second connecting bar. The method of claim 15, And the through hole of the first terminal of the two terminals has a closed structure. The method of claim 15, And the through hole of the first terminal of the two terminals has an open structure. The method of claim 15, Wherein said high melting point metal composition is varied in accordance with a desired high melting point metal burst temperature. The method of claim 15, The elastic connection unit is a thermal fuse protection device, characterized in that made of an elastic conductive material.

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