JP3082275U - Overload protector - Google Patents

Abstract

(57) [Summary] [Problem] To quickly connect with a switch unit or an outlet unit in an extension cord outlet,
Provided is an overload protector capable of eliminating a solder welding point. SOLUTION: A case 10 and a switch unit or an outlet unit 2 are mutually connected by connecting portions formed respectively, and an inner end of a power input piece 13 exposed to the outside of the case 10 has a sensor piece 1 which jumps up due to overheating.
4, one end of the sensor piece 14 is a free end and a contact point 14
2 are provided. In addition, the overload protector 1 further includes a tank path 114 penetrating outside from the contact point 142, and the fire wire conductive piece 21 is appropriately extended and positioned in the tank path 114, and is in normal contact with the contact point 142 of the sensor piece 14. I do. When the current is overloaded, the sensor piece 14 jumps up and separates from the conductive wire piece 21.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an overload protector, and in particular, it can simplify a contact structure of a kind of overload protector and can provide a simple connection method. The present invention relates to an overload protector for an extension cord outlet that can be quickly assembled and can eliminate a solder welding point.

[0002]

[Prior art]

 Conventional extension cord outlets are provided with a number of outlets in the base, plugs are inserted and used (for some extension cord outlets, a separate switch is installed and power cutoff is controlled) . In addition to being effectively extendable with respect to the supply of power, the conventional structure increases the number of outlets that were originally single, allowing the use of many electrical products.

However, if the number of plugs inserted into one outlet is excessive, the load on the extension cord outlet increases, and it is inevitable that overload is caused. For this reason, some extension cord outlets have overload protectors installed in the structure. When the temperature of the extension cord outlet exceeds the predetermined current and the temperature rises, the power supply is cut off automatically and the power supply is cut off to avoid danger. When the working temperature of the extension cord outlet returns to normal, the overload protector also automatically opens the circuit and returns to normal operation.

On the other hand, at present, the arrangement of the overload protector in many extension cord outlets is as shown in FIGS. In this system, the outlet 91 and the switch 92 are embedded in the upper case part 90 of the extension cord outlet 9. The overload protector 93 is installed at the end of the power cord 94. The overload protector 93 has a power input piece 931, a power output piece 932, and a button 933.

At the time of combination, the wire 941 in the power cord 94 is soldered to the power input piece 931, and the short conductive wire 95 is soldered to the power output piece 932 of the overload protector 93. The opposite end of the conductive wire 95 is soldered to the fire input end 921 of the switch 92, and the ground 942 in the power cord 94 is directly soldered to the ground end 922 of the switch 92.

In operation, when the working temperature exceeds a predetermined value, the overload protector 93 automatically cuts off the circuit. At this time, the button 933 is released. When the working temperature of the extension cord outlet 9 is restored to the normal position, the button 933 is pressed and restored to the original position, and the circuit of the overload protector 93 is opened again.

However, the above conventional structure has the following disadvantages. First, there are too many solder joints for installing the overload protector 93. As shown in FIG. 12, four solder joints 99A, 99B, 99C and 99D are required between the power cord 94 of the extension cord outlet 9 and the switch 92 of the overload protector 93. Excessive solder joints 99A, 99B, 99C, 99D not only increase the time and difficulty of assembling, but also require a great deal of manpower and time for quality control. 99A, 99B, 99C, 99D must be tested. In addition, the excessive solder joints 99A, 99B, 99C, and 99D also increase the rate of causing defects in the product, which adversely affects the yield rate.

Further, although the overload protector 93 is a separated solid, since the conductive wire 95 and the switch 92 are interconnected, the overload protector 93 is connected to the extension cord outlet 9. Occupies a certain space in. Therefore, it is difficult to reduce the size of the extension cord outlet 9.

Further, since the overload protector 93 is an independent component, it is difficult to further simplify the structure. Therefore, its parts and assembly costs are fixed, and it is difficult to reduce manufacturing costs. In addition, since the overload protector 93 and the switch 92 are connected by the conductive wire 95, there is a possibility that the two will fall off and be separated.

[0010]

[Problems to be solved by the invention]

 The purpose of the present invention is that the structure of the contacts can be simplified and a simple connection method can be provided, so that they can be quickly combined in an extension cord outlet and solder welding points can be omitted. Is to provide an overload protector. Another object of the present invention is to provide an overload protector in which the connection between the overload protector and the switch unit (or the outlet unit) is quick and the solder welding point can be omitted.

[0011]

[Means for Solving the Problems]

 An overload protector according to the present invention for solving the above-mentioned problems is provided with a case, which is connected to a conductive wire which is appropriately extended from a switch unit (or an outlet unit) in an extension cord outlet and has a case. The case and the switch unit (or outlet unit) are connected to each other by connecting portions formed respectively. The overload protector has a power input piece exposed to the outside of the case, and a sensor piece that jumps up due to overheating at an inner end of the power input piece. One end of the sensor piece is a free end, and the end is provided with a contact point. The overload protector is provided with a tank passage which penetrates outside from the contact point. The caulked conductive strips are appropriately extended and positioned in the tank path and are in normal contact with the contact points of the sensor strips. When the current overloads, the sensor piece jumps up and separates from the conductive wire.

[0012]

[Embodiment of the invention]

 As shown in FIG. 1, the overload protector 1 according to the first embodiment of the present invention includes a case 10, a power input piece 13, a sensor piece 14, and a button 15 having working elasticity. The case 10 includes a lower case base 11 and an upper case base 12. The base of the lower case base 11 has a depressed space 111, and is provided with the power input piece 13, the sensor piece 14, and the button 15. In the lower case base 11, two protruding columns 112A and 112B are provided. Separately, a passage 113 is provided in the lower case base 11, whereby the push portion 151 of the button 15 extends to the lower case base 11. Furthermore, a tank path 114 is provided in the lower case base 11, whereby the fire wire conductive piece 21 of the external component is inserted and combined. A small number of coupling holes 115 are formed in the base wall of the lower case base 11, and the lower case base 11 has a connecting portion 116 separately. The connecting portion 116 is a fitting tank 116A in this embodiment.

The upper case table 12 corresponds to the lower case table 11. The upper case base is provided with projection columns 121A and 121B corresponding to the projection columns 112A and 112B of the lower case table 11, respectively. Separately, some coupling holes 122 are formed and coupled to the lower case base 11 using coupling components 16 (such as rivets).

The power input piece 13 is a rectangular conductive piece. A rivet connection hole 131 is provided at one end of the piece, and a localization hole 132 is provided near the rivet connection hole 131. At least one connection hole 133 is provided at the opposite end of the piece. The sensor piece 14 is a conductive piece (such as a bimetallic piece) having a property of being bent and deformed due to overheating, and has a rivet connection hole 141 at one end of the piece. It is fixed at the position 131. The free end of the sensor piece 14 has a contact point 142.

The button 15 has a push part 151 and a piece-shaped isolated end 152, and has a separate storage tank 153, and the elastic part 18 is accommodated therein to provide elasticity. In this embodiment, the outlet unit 2 has a continuous form. A large number of sets of outlets are provided in the outlet unit 2, and the outlet unit 2 has a fire wire conductive piece 21 and a ground conductive piece 22 extending to the outside. The conductive wire 21 has a positioning hole 211 and a contact point 212, and the ground conductive piece 22 has at least one connection hole 221.

In addition, a connection portion 23 corresponding to the connection portion 116 of the case 10 is provided separately from the outlet unit 2. The connecting portion 23 is a connecting tenon 23A in this embodiment. As shown in FIGS. 1 and 2, at the time of combination, the fitting tank 116A of the case 10 is connected to the connecting tenon 23A of the outlet unit 2, and the positioning post 132A of the lower case base 11 is The piece having the connection hole 133 extends out of the lower case base 11. The opposite end of the piece is connected to the sensor piece 14.

The conductive wire 21 of the outlet unit 2 is accommodated in the tank path 114 of the lower case base 11, and a projection 112 B opposite to the lower case base 11 is fitted into a positioning hole 211 of the conductive wire 21. Localized. As a result, the contact point 212 of the conductor wire 21 contacts the free end of the sensor piece 14.

The button 15 is provided below the sensor piece 14, the push portion 151 is exposed, and the isolated end 152 is stocked at the contact point 142 of the sensor piece 14 by the elastic piece 18. Finally, the upper case base 12 is put on the lower case base 11, and the combination of the overload protectors is completed. Thereafter, when the upper case body 61 and the lower case body 62 of the extension cord outlet are closed and the power cord 63 is connected, the extension cord outlet is completed.

Subsequently, as shown in FIGS. 3 and 4, after the combination, the outlet unit 2 and the overload protector 1 are connected simultaneously, and there is no need for any solder welding between them. At this time, the connection hole 133 on the power input piece 13 in the overload protector 1 is connected and welded and fixed to the power wire 631 of the extension cord outlet, and is connected to the ground conductive piece 22 in the outlet unit 2. The connection hole 221 is connected and welded and fixed to the power ground 632 of the extension cord outlet.

Further, as shown in FIGS. 5 and 6, when the current is overloaded, when the current is overloaded, the sensor piece 14 jumps up, and the elastic piece 18 drives the movement of the isolation piece 152, so that the sensor piece 14 is free. The end contact point 142 is severed, and the power line is cut off. When the coco color overload disappears and the working temperature returns to a normal state, the sensor piece 14 returns to its original position by elasticity. At this time, the button 15 is pushed, the isolated end 152 is restored to the original position, and the free end of the sensor piece 14 is restored to the original state. Thus, the conduction of the power line is restored (see FIGS. 3 and 4).

The button 15 and the elastic part 18 of the overload protector 1 are optional parts. If the parts are not installed, an implementation as shown in FIG. 7 is possible. That is, when the current is overloaded, the sensor piece 14 jumps up, and the contact point 142 at the free end is separated from the contact point 212 of the wire conductor piece 21 of the outlet unit 2 and the passage is cut off. When the overload disappears and the working temperature returns to normal, the free end of the sensor piece 14 returns to its original state, and the continuity is restored.

As shown in FIG. 8, the switch outlet unit 3 in the second embodiment of the present invention replaces the outlet unit 2 described above. The switch outlet unit 3 has a plurality of switches 31, and each switch 31 is provided with a pair of outlet conductive pieces 32A and 32B which are directly extended and used for inserting and connecting a plug. Each switch 31 independently controls energization and disconnection of the corresponding outlet conductive pieces 32A, 32B.

The switch outlet unit 3 has a fire wire conductive piece 33 and a ground conductive piece 34 extending to the outside. The conductive wire 33 has a localization hole 331 and a contact point (not shown), and the ground conductive piece 34 has at least one or more connection hole 341.

In addition, the switch outlet unit 3 corresponds to the connecting portion 116 of the case 10, and a connecting portion 35 is provided. The connecting portion 35 is a connecting tenon 35A in this embodiment. The connection between the overload protector 1 and the switch outlet unit 3 is the same as in the previous example.

In the embodiments shown in FIGS. 2 to 8, the outlet unit 2 and the switch outlet unit 3 both take the form of a continuous stand. On the other hand, the outlet or switch of the non-seated type shown in FIG. 9 is provided with a separate connecting portion 41 on the case of the switch 4 (or outlet) of the overload protector 1 and the overload protector 1. The switch 4 (or outlet) is connected to the wire conductive piece 42 and is appropriately extended. Further, a localization hole 421 and a contact point (not shown) are formed at the extended end. The wire conductive strips 42 are correspondingly combined in the overload protector 1 of the present invention, and the same effect is achieved.

Further, the lower case base 11 and the upper case base 12 of the overload protector 1 are respectively formed as an upper case part 20 A and a lower case part 20 B (see FIG. 2) integrally formed with the outlet unit 2, or extended. An upper case body 61 and a lower case body 62 are formed integrally with the cord outlet.

As shown in FIG. 10, the overload protector 1 can be fixed at the time of assembly without using the connecting portion 41. At this time, stereotactic projection walls 611 and 612 are formed in the upper case body 61 and the lower case body 62 of the extension cord outlet according to the contour of the overload protector 1. The overload protector 1 is fixed and connected using the stereotactic projection walls 611 and 612.

[0028]

[Effect of the invention]

 As described above, there is no need to separately connect the outlet unit of the present invention and the overload protector using a conductive wire, so that it is easy to assemble. In addition, the overload protector can be quickly connected to other parts by the connecting portion of the case or the positioning protrusion walls of the upper and lower case bodies of the extension cord outlet, so that fixing and assembling are quick. . Also, since the overload protector is space-saving, the extension cord outlet can be reduced in size. In addition, since the components of the overload protector can be simplified, cost reduction can be promoted.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an overload protector according to a first embodiment of the present invention.

FIG. 2 is an external perspective view showing a combined state of the overload protector according to the first embodiment of the present invention.

FIG. 3 is a top view illustrating a state where the free ends of the sensor pieces of the overload protector according to the first embodiment of the present invention are in contact with each other;

FIG. 4 is a cross-sectional view illustrating a state where the free ends of the sensor pieces of the overload protector according to the first embodiment of the present invention are in contact with each other.

FIG. 5 is a top view showing a state in which the free end of the sensor piece of the overload protector according to the first embodiment of the present invention is jumped up.

FIG. 6 is a cross-sectional view showing a state in which a free end of a sensor piece of the overload protector according to the first embodiment of the present invention is jumped up.

FIG. 7 is a top view illustrating an overload protector according to a second embodiment of the present invention.

FIG. 8 is an exploded perspective view illustrating an overload protector according to a third embodiment of the present invention.

FIG. 9 is an exploded perspective view showing an overload protector according to a fourth embodiment of the present invention.

FIG. 10 is an exploded perspective view showing an overload protector according to a fifth embodiment of the present invention.

FIG. 11 is an external perspective view showing a state where a conventional extension cord outlet overload protector is combined.

FIG. 12 is an external perspective view showing a solder welding point of an overload protector used for a conventional extension cord outlet.

[Explanation of symbols]

 2 Outlet unit 10 Case 13 Power input piece 14 Sensor piece 15 Button 18 Elastic part 21 Fire wire conductive piece 114 Tank way 142 Contact point 151 Push part 152 Isolated end

Claims (5)

[Utility model registration claims] 1. A case, a power input piece exposed outside the case, and a tank path, wherein an inner end of the power input piece has a sensor piece that jumps up due to overheating, and one end of the sensor piece is A contact point is provided at a free end, and in the extension cord outlet, fire wire conductive pieces appropriately extended from the switch unit or the outlet unit are appropriately extended and positioned in the tank path and connected to each other, An overload protector characterized by being in normal contact with the contact point of the sensor piece. 2. A button is provided, said button having a one-piece isolated end, and a push part exposed to the outside, said button having a working elasticity by an elastic part, and said one-piece isolated end. 2. The overload protector according to claim 1, wherein the work elasticity is appropriately stored at a contact point of the free end of the sensor piece. 3. The overload protector according to claim 1, further comprising a connecting portion integrally formed on the main body together with the switch unit or the outlet unit, and being connected to each other by the connecting portion. 4. The overload protector according to claim 1, wherein the case is integrally formed on a body of the switch unit or the outlet unit. 5. The overload protector according to claim 1, wherein the case is integrally formed inside the case of the extension cord outlet.