CN218828294U - Rotary socket - Google Patents

Abstract

The utility model relates to a rotary socket includes base subassembly, panel components and protection component. The base assembly is used for being electrically connected with a power supply; the panel component is rotatably connected to the base component and can be electrically connected with the base component, the panel component comprises a jack, and the jack is used for providing a jack for the electrical connection of the electrical appliance plug and the panel component; the protection element is arranged on the panel assembly and is electrically connected with the panel assembly; the resistance value of the protection element is increased according to the temperature rise of the panel assembly, and when the temperature of the panel assembly is higher than a preset value, the resistance value of the protection element tends to be not large. Through structural style as above, not only can reduce the risk that the socket temperature that leads to because of the winding of internal line risees, rotatory socket has the overheat protection function simultaneously to can reduce because potential safety hazards such as conflagration that the socket temperature is too high to lead to, with the practical security of improvement rotatory socket.

Description

Rotary socket

Technical Field

The utility model relates to a financial bank uses socket technical field, especially relates to a rotary socket.

Background

In actual work scenes such as present bank outlets, all kinds of computer rooms, internode, the fixed position is installed when all decorating to the socket that uses, direction adjustment can't be realized, the socket also does not have the overheat protection function, and there are a large amount of high-Power equipment in the bank, for example, the air conditioner, uninterrupted Power Supply (Uninterruptable Power Supply, english abbreviation UPS), large capacity storage equipment, internal and external network equipment, server integrated equipment etc. socket orientation is fixed and is leaded to the plug orientation distortion, the circuit confusion has been caused, this kind of high-Power equipment is three hole plugs, power is big, easily generate heat, the circuit distortion probably leads to inside electric wire winding, plug and socket temperature risees, very easily arouse the conflagration, cause great loss.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide a rotary socket for solving the technical problem in the related art that the fixed position of the socket is likely to cause the line distortion.

A rotary socket, the rotary socket comprising:

a base assembly for electrical connection with a power source;

the panel component is at least partially rotatably connected to the base component and can be electrically connected with the base component, and the panel component comprises a jack which is used for providing a plug hole for the electrical connection of an electrical appliance plug and the panel component;

the protection element is arranged on the panel assembly and is electrically connected with the panel assembly;

when the temperature of the panel assembly is higher than a preset value, the resistance value of the protection element is increased to enable the panel assembly and the base assembly to be isolated in an insulating mode.

In one embodiment, the panel assembly comprises:

the base plate comprises a fixed part and a rotating part, the protection element is fixed on the rotating part plate, the rotating part is rotatably connected with the fixed part, and the fixed part is fixedly connected with the base assembly;

the first annular conducting strip is fixedly connected to the rotating part, and the protection element is electrically connected with the first annular conducting strip;

the first elastic gasket is fixedly connected to the side face, deviating from the first annular conducting strip, of the rotating part, electrically connected with the protection element, and used for being electrically connected with a zero line corresponding to the electric appliance plug.

In one embodiment, the panel assembly further comprises:

the second annular conducting strip is fixedly connected to the substrate and is positioned on the same side face as the first annular conducting strip, and the protection element is electrically connected with the second annular conducting strip;

and the second elastic gasket is fixedly connected with the rotating part and is positioned on the same side face as the first elastic gasket, the second elastic gasket is electrically connected with the protection element, and the second elastic gasket is used for being electrically connected with the corresponding live wire of the electric appliance plug.

In one embodiment, the base assembly comprises:

the base is fixedly connected with the fixing part;

the first conductor is fixedly connected to the base and can be electrically connected with the first annular conducting strip;

and the second conductor is fixedly connected to the base and is positioned on the same side surface of the base as the first conductor, and the second conductor can be electrically connected with the second annular conducting strip.

In one embodiment, the first and second electrical conductors are each an annular structure.

In one embodiment, the base assembly further includes a protective casing, the protective casing is fixedly connected to the base, an interlayer space is defined between the protective casing and the base, and the first conductor and the second conductor are disposed in the interlayer space.

In one embodiment, the protective shell and the base are made of materials with insulating property.

In one embodiment, the base assembly further comprises a base plug fixedly connected to the protective housing, the base plug electrically connected to the first and second electrical conductors, and the base plug adapted to electrically connect to the power source.

In one embodiment, the protective panel comprises a fixed plate and a rotating plate, wherein the rotating plate is rotatably connected with the fixed plate, the fixed plate is fixedly connected with the fixed part, and the rotating plate is rotatably connected with the rotating part; the jack is arranged on the rotating plate;

the substrate and the protection panel are made of materials with insulating property.

In one embodiment, the protection element is a thermistor.

The utility model has the advantages that:

the technical scheme of the utility model a rotary socket is provided, wherein, base subassembly mainly used realizes the electricity with the power and is connected, with panel assembly and base subassembly rotatable coupling to connect panel assembly and base subassembly electricity, so that panel assembly can the relative base subassembly rotate. And through setting up the jack on the panel components, when electrical apparatus needs to be connected with the power, through in inserting the jack on the panel components with the electrical apparatus plug to realize electrical apparatus plug and panel components's electricity and be connected, it is fixed to the plug block through the jack on the panel components simultaneously, in order to guarantee electrical apparatus plug and panel electricity connected stability. Through the rotation of panel components relative base subassembly, make the direction of electrical apparatus plug can not twisted to make the circuit cleaner and tidier, with the winding risk of the inside electric wire that reduces to lead to because of the circuit distortion. Set up the protection component on the panel subassembly, when the temperature on the panel subassembly is higher than the default, the resistance value of protection component increases to make panel subassembly and electrical apparatus plug disconnection electricity be connected, thereby realize protecting electrical apparatus component, also can prevent simultaneously that rotatory socket is overheated to lead to damaging. Through structural style as above, not only can reduce the risk that the socket temperature that leads to because of the winding of internal line risees, rotatory socket has the overheat protection function simultaneously to can reduce because potential safety hazards such as conflagration that the socket temperature is too high to lead to, with the practical security of improvement rotatory socket.

Drawings

Fig. 1 is an exploded schematic view of a rotary socket according to an embodiment of the present invention;

fig. 2 is a schematic structural view illustrating a connection between a protection element and a rotating portion in a rotary plug according to an embodiment of the present invention;

fig. 3 is a schematic structural view illustrating a connection between a rotating portion and an elastic gasket of the rotary plug according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a protective panel according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a substrate in a rotary plug according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a base in a rotary plug according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a protective shell in a rotary plug according to an embodiment of the present invention.

Reference numerals:

a base assembly 100; a base 110; a first electrical conductor 120; a second electrical conductor 130; a protective case 140; a base plug 150; an annular electrical conductor 160;

a panel assembly 200; a protection element 210; a substrate 220; a fixing portion 221; a rotating portion 222; a first annular conductive sheet 230; a first resilient pad 240; a second annular conductive sheet 250; a second resilient pad 260; a conductive rod 270; a protective panel 280; a fixing plate 281; a rotating plate 282; a socket 2821; a third resilient pad 290.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Due to the fact that a large number of high-power devices exist in bank outlets, jacks in sockets in related technologies are relatively fixed, the direction of an electric appliance plug cannot be changed, and therefore potential safety hazards such as fire caused by cable chaos and even winding can be caused.

To this end, an embodiment of the present invention provides a rotary plug, referring to fig. 1 to 7, an embodiment of the present invention provides a rotary socket, which includes a base assembly 100, a panel assembly 200 and a protection element 210. The base assembly 100 is for electrical connection to a power source; the panel assembly 200 is at least partially rotatably connected to the base assembly 100, the panel assembly 200 can be electrically connected to the base assembly 100, the panel assembly 200 includes a socket 2821, the socket 2821 is used for providing a plug hole for electrically connecting an electrical plug and the panel assembly 200; the protection element 210 is arranged on the panel assembly 200, and the protection element 210 is electrically connected with the panel assembly 200; the resistance value of the protection element 210 increases with the temperature of the panel assembly 200, and when the temperature of the panel assembly 200 is higher than a preset value, the resistance value of the protection element 210 increases to insulate and isolate the panel assembly from the base assembly.

In the rotary socket provided in the present embodiment, the base assembly 100 is mainly used for electrically connecting with a power supply, rotatably connecting the panel assembly 200 with the base assembly 100, and electrically connecting the panel assembly 200 with the base assembly 100, so that the panel assembly 200 can rotate relative to the base assembly 100. And through set up jack 2821 on panel components 200, when electrical apparatus needs to be connected with the power, through in inserting the electrical apparatus plug to jack 2821 on panel components 200 to realize electrical apparatus plug and panel components 200's electric connection, it is fixed to the plug block through jack 2821 on panel components 200 simultaneously, with the stability of guaranteeing electrical apparatus plug and panel electricity to be connected. The direction of the electrical plug is not twisted by the rotation of the panel assembly 200 relative to the base assembly 100, so that the line is tidier, and the risk of winding of the internal electric wire caused by line twisting is reduced. The protection element 210 is arranged on the panel assembly 200, when the temperature of the panel assembly 200 is higher than a preset value, the resistance of the protection element 210 is increased to enable the panel assembly 200 and the base assembly 100 to be isolated in an insulating mode, the panel assembly 200 is electrically disconnected from an electrical appliance plug, accordingly, the electrical appliance element is protected, and meanwhile, damage caused by overheating of a rotary socket can be prevented. Through structural style as above, not only can reduce the risk that the socket temperature that leads to because of the winding of internal line risees, rotatory socket has the overheat protection function simultaneously to can reduce because potential safety hazards such as conflagration that the socket temperature is too high to lead to, with the practical security of improvement rotatory socket.

In one embodiment, as shown in FIG. 2, the protection element 210 is a thermistor. The thermistor has the advantages of high sensitivity, wide working temperature range, small volume, convenient use, good stability and the like. The thermistor is provided in the panel assembly 200, and the rotary socket is overheat-protected by the thermistor, thereby improving safety of the rotary plug. In this embodiment, the protection device 210 is made of a posistor or a semiconductor material, and has a working temperature of-55 ℃ to 75 ℃ and a resistance value of 25 Ω at normal temperature.

In one embodiment, as shown in fig. 5, the panel assembly 200 includes a substrate 220, a first annular conductive sheet 230, and a first resilient gasket 240. The substrate 220 includes a fixing portion 221 and a rotating portion 222, the rotating portion 222 is rotatably connected to the fixing portion 221, the fixing portion 221 and the base assembly 100 are fixedly connected to the protection component 210 and fixed on the rotating portion 222; the first annular conductive sheet 230 is fixedly connected to the rotating part 222, and the protection element 210 is electrically connected to the first annular conductive sheet 230; the first elastic pad 240 is fixedly connected to a side surface of the rotating portion 222 away from the first annular conductive sheet 230, the first elastic pad 240 is electrically connected to the protection element 210, and the first elastic pad 240 is used for electrically connecting to a neutral wire corresponding to an electrical appliance plug. In this embodiment, the fixing portion 221 of the substrate 220 is configured to be fixedly connected to the base assembly 100, and the rotating portion 222 is configured to support the first annular conductive sheet 230 and the first elastic pad 240, and the first annular conductive sheet 230 and the first elastic pad 240 are driven to rotate by the rotation of the rotating portion 222. The first annular conductive sheet 230 and the first elastic pad 240 are electrically connected by electrically connecting the protection element 210 to the first annular conductive sheet 230 and the first elastic pad 240. The first elastic gasket 240 is connected to and disconnected from the first annular conductive sheet 230 by the change of the resistance value in the protection element 210, so that the overheating protection of the rotary socket is realized.

In one embodiment, as shown in fig. 5, the panel assembly 200 further includes a second annular conductive sheet 250 and a second elastic pad 260, the second annular conductive sheet 250 is fixedly connected to the rotating portion 222 and located at the same side as the first annular conductive sheet 230, and the protection element 210 is electrically connected to the second annular conductive sheet 250; the second elastic pad 260 is fixedly connected to the rotating portion 222 and located on the same side as the first elastic pad 240, the second elastic pad 260 is electrically connected to the protection element 210, and the second elastic pad 260 is used for electrically connecting to a corresponding live wire of an electrical appliance plug. The second annular conductive sheet 250 and the second elastic pad 260 are fixed on the rotating portion 222, so that the rotating portion 222 drives the second annular conductive sheet 250 and the second elastic pad 260 to rotate relative to the base assembly 100. The second elastic pad 260 is electrically connected to the second annular conductive sheet 250 by electrically connecting the protection element 210 to the second elastic pad 260 and the second annular conductive sheet 250. The second elastic gasket 260 is connected with and disconnected from the second annular conductive sheet 250 through the change of the resistance value in the protection element 210, so that the overheating protection of the rotary socket is realized.

In one embodiment, as shown in FIG. 6, the base assembly 100 includes a base 110, a first conductor 120, and a second conductor 130, the base 110 being fluidly coupled to a fixture on a substrate 220; the first conductor 120 is fixedly connected to the base 110, and the first conductor 120 can be electrically connected to the first annular conductive sheet 230; the second conductive body 130 is fixedly connected to the base 110 and located on the same side of the base 110 as the first conductive body 120, and the second conductive body 130 can be electrically connected to the second annular conductive sheet 250. The base 110 is used for supporting the first conductor 120 and the second conductor 130, and the first conductor 120 is electrically connected with the first annular conducting strip 230, and the second conductor 130 is electrically connected with the second annular conducting strip 250, so as to realize the electrical connection between the base assembly 100 and the panel assembly 200, because the first annular conducting strip 230 and the second annular conducting strip 250 are annular structures, when the panel assembly 200 rotates relative to the base assembly 100, the panel assembly 200 and the base assembly 100 can be electrically connected all the time, thereby improving the stability of the use of the rotary socket.

In one embodiment, the first conductor 120 and the second conductor 130 are both annular structures. The first conductor 120 and the second conductor 130 are also configured to be ring-shaped structures, so that the first conductor 120 and the first conducting ring 230, and the second conductor 130 and the second conducting ring 250 can be electrically connected no matter how the panel assembly 200 rotates, thereby ensuring the stability of the use of the rotary socket.

In one embodiment, as shown in fig. 7, the base assembly 100 further includes a protective housing 140, the protective housing 140 is fixedly connected to the base 110, an interlayer space is defined between the protective housing 140 and the base 110, and the first conductor 120 and the second conductor 130 are disposed in the interlayer space. The protective shell is used to protect the parts inside the panel assembly 200. The first conductor 120 and the second conductor 130 are accommodated by enclosing an interlayer space between the protective housing 140 and the base 110.

In one embodiment, the protective housing 140 and the base 110 are made of insulating materials. Specifically, polycarbonate is used for both the protective housing 140 and the base 110. The protective housing 140 and the base 110 are made of an insulating material to improve the safety of the base assembly 100.

In one embodiment, as shown in fig. 7, the base assembly 100 further comprises a base plug 150, the base plug 150 is fixedly connected to the protective housing 140, the base plug 150 is electrically connected to the first conductor 120 and the second conductor 130, and the base plug 150 is used for electrically connecting to a power source. The electrical connection of the plug base 110 to the first and second electrically conductive sheets 230 and 250 is achieved by providing a base plug 150 on the protective housing 140 and electrically connecting the base plug 150 to the first and second electrical conductors 120 and 130. The rotary socket provided by the embodiment can plug the base plug 150 into the power supply so as to realize the electric connection between the rotary socket and the power supply, and the rotary socket is small in size and more convenient to use.

In one embodiment, as shown in FIG. 4; the panel assembly 200 further comprises a protective panel 280 and a rotating plate 282, including a fixing plate 281 and a rotating plate 282, the rotating plate 282 is rotatably connected with the fixing plate 281, the fixing plate 281 is fixedly connected with the fixing portion 221, and the rotating plate 282 is rotatably connected with the rotating portion 222; the insertion hole 2821 is formed in the rotating plate 282; the substrate 220 and the protection panel 280 are made of insulating materials. The first elastic pad 240, the second elastic pad 260 and the thermistor fixed on the substrate 220 are protected by providing a protection panel 280 on the panel assembly 200. By rotationally connecting the fixing plate 281 and the rotating plate 282, so that the rotating plate 282 can rotate relative to the fixing plate 281, and by fixedly connecting the fixing plate 281 and the fixing portion 221, the rotating plate 282 is fixedly connected with the rotating portion 222, so that the rotating plate 282 can drive the rotating portion 222 to rotate. And set up the jack 2821 on the rotating plate 282, when the electrical apparatus plug inserts the jack 2821, the electrical apparatus plug and first resilient pad 240 and second resilient pad 260 butt, and then realize the electrical connection of electrical apparatus plug and first resilient pad 240 and second resilient pad 260. Meanwhile, the direction of the electrical appliance plug can be changed by rotating the rotating plate 282.

It should be noted that, as shown in fig. 2 to fig. 7, the rotating socket provided in this embodiment may also be a triple-socket, and when the rotating socket is a triple-socket, the panel assembly 200 further includes a conductive rod 270 disposed at a middle position of the substrate 220. An annular conductor 1602802821 is disposed on the base 110, and the conductive rod 270 can be inserted into the inner hole of the annular conductor 160 to electrically connect the conductive rod 270 and the annular conductor 160. The conductive rod 270 is electrically connected to a third elastic pad 290 fixed to the other side surface of the rotating portion 222, and the third elastic pad 290 is electrically connected to a ground line to protect the electric appliance.

It should be noted that the first annular conductive plate 230, the second annular conductive plate 250, the conductive rod 270, the first conductor 120, the second conductor 130, and the annular conductor 160 in the rotary socket according to the embodiment of the present invention are made of cymbal copper alloy. And the base plug 150 on the base assembly 100 is a copper alloy.

The utility model provides a rotatory socket is when using, inserts the socket of required position with base plug 150, forms the coupling by panel components 200 and base subassembly 100 and is connected to through first annular conducting strip 230 and the coupling of first electric conductor 120, second annular conducting strip 250 and the coupling of second electric conductor 130, and conducting rod 270 and the coupling of annular electric conductor 160, realize that the slip is electrically conductive, realized panel components 200360 rotatory, other insert electrical apparatus insert the panel can. The embodiment of the utility model provides an annular conducting strip, electric conductor all adopt cymbal copper alloy material, are used for the sealed in space to the contact surface to provide high shielding effect, have excellent crushing resistance, resilience and corrosion resistance. Through adopting the semiconductor thermistor electricity to connect between annular conducting strip and the elastic gasket, can automatic disconnection when meetting plug overheated (surpass 75 ℃), prevent that the conflagration from taking place, after the temperature descends, still can the circular telegram continue to use, improve security, convenience greatly in the use.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A rotary socket, comprising:

a base assembly for electrical connection with a power source;

the panel component is at least partially rotatably connected with the base component and can be electrically connected with the base component, and the panel component comprises a jack which is used for providing a plug hole for the electrical connection of an electrical appliance plug and the panel component;

the protection element is arranged on the panel assembly and is electrically connected with the panel assembly;

when the temperature of the panel assembly is higher than a preset value, the resistance value of the protection element is increased to enable the panel assembly and the base assembly to be isolated in an insulating mode.

2. The rotary jack of claim 1, wherein the panel assembly comprises:

the base plate comprises a fixed part and a rotating part, the rotating part is rotatably connected with the fixed part, the fixed part is fixedly connected with the base assembly, and the protection element is fixed on the rotating part;

the first annular conducting strip is fixedly connected to the rotating part, and the protection element is electrically connected with the first annular conducting strip;

the first elastic gasket is fixedly connected to the side face, deviating from the first annular conducting strip, of the rotating part, electrically connected with the protection element, and used for being electrically connected with a zero line corresponding to the electric appliance plug.

3. The rotary socket according to claim 2, wherein the panel assembly further comprises:

the second annular conducting strip is fixedly connected to the rotating part and is positioned on the same side face as the first annular conducting strip, and the protection element is electrically connected with the second annular conducting strip;

and the second elastic gasket is fixedly connected with the rotating part and is positioned on the same side face as the first elastic gasket, the second elastic gasket is electrically connected with the protection element, and the second elastic gasket is used for being electrically connected with the corresponding live wire of the electric appliance plug.

4. The rotary socket according to claim 3, wherein said base assembly comprises:

the base is fixedly connected with the fixing part;

the first conductor is fixedly connected to the base and can be electrically connected with the first annular conducting strip;

and the second conductor is fixedly connected to the base and is positioned on the same side surface of the base as the first conductor, and the second conductor can be electrically connected with the second annular conducting strip.

5. The rotary socket of claim 4, wherein the first electrical conductor and the second electrical conductor are both ring-shaped structures.

6. The rotary jack of claim 4, wherein the base assembly further comprises a shield housing, the shield housing is fixedly connected to the base, an interlayer space is defined between the shield housing and the base, and the first and second conductors are disposed in the interlayer space.

7. The rotary socket of claim 6, wherein the protective housing and the base are made of insulating materials.

8. The rotary socket assembly according to claim 6, further comprising a base plug fixedly connected to the protective housing, the base plug being electrically connected to the first and second electrical conductors, the base plug being adapted to be electrically connected to the power source.

9. The rotary socket according to claim 2, wherein the panel assembly further comprises:

the protective panel comprises a fixed plate and a rotating plate, the rotating plate is rotatably connected with the fixed plate, the fixed plate is fixedly connected with the fixed part, and the rotating plate is rotatably connected with the rotating part;

the jack is arranged on the rotating plate;

the substrate and the protection panel are made of materials with insulating property.

10. A rotary jack according to any one of claims 1-9 wherein the protective element is a thermistor.

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