WO2014082605A1

WO2014082605A1 - Manually reset overload and overtemperature protection power socket

Info

Publication number: WO2014082605A1
Application number: PCT/CN2013/089628
Authority: WO
Inventors: 马永红; 张宗宁
Original assignee: 东莞市凯恩电子科技有限公司
Priority date: 2012-11-30
Filing date: 2013-12-17
Publication date: 2014-06-05
Also published as: CN102957061B; CN102957061A

Abstract

A manually reset overload and overtemperature protection power socket, comprising a socket body (10); the socket body is internally provided with a manual power-off reset protection unit (20) for automatically disconnecting a load circuit in case of load overtemperature, an alarm unit (30), and a rectifier filter unit (40); the input end and output end of the manual power-off reset protection unit are respectively connected to the live wire and load of the socket body; the alarm unit and the rectifier filter unit are connected in parallel; the rectifier filter unit is connected in parallel between the input end and load of the manual power-off reset protection unit; the manual power-off reset protection unit automatically disconnects the load circuit in case of overload and overtemperature, and simultaneously the alarm unit sends an alarm signal; after the load circuit is disconnected, the manual power-off reset protection unit can regain conductivity only by manually disconnecting the power. The manually reset overload and overtemperature protection power socket sends an alarm signal in case that overload and overtemperature occur to an electric device, provides sustained open-circuit protection, and can be manually reset after a fault is confirmed to be resolved.

Description

Manual reset overload over temperature protection power socket

[Technical Field]

The invention relates to an overload over-temperature protection device for an electric appliance, in particular to an overload over-temperature protection power socket with a manual reset with overload over-temperature alarm and manual reset protection.

【Background technique】

Various types of power outlets are widely used in people's lives to connect electrical or electronic products to a power source. When people use power outlets, they not only pay attention to their functions, but also pay more attention to their safety. When a fault occurs in various components or electronic circuits that use electrical loads, the load may be heated. When the temperature exceeds the normal value, the load may be faulty, which may affect the normal use of the device. The various electrical loads and the power source are connected through a power plug and a socket. Traditional power outlets are well known. They only have simple power transfer and connection functions, and do not have an overload over-temperature alarm and a continuous power-off protection function for the load, which makes it impossible to overload the load when it is over-temperature. The power is turned off in time to cause damage to the equipment. Some power transfer devices have overload over-temperature protection function, but due to the lack of alarm function and manual power-off reset function, people can not know and eliminate the hidden troubles in time, and some devices have been automatically reset without eliminating the hidden troubles. Therefore, there is a possibility of a failure and a safety hazard. [Summary of the Invention]

The invention aims to solve the above problems, and provides an overload over-temperature protection capable of issuing an alarm signal to the overload and over-temperature of the electric equipment and performing permanent disconnection protection, and manually resetting the manual reset on the premise that the fault has been eliminated. Power outlet.

In order to achieve the above object, the present invention provides a manually reset overload over-temperature protection power socket, which includes a socket body, wherein a manual power-off of an automatic disconnection load circuit when a load is over-temperature is provided in the socket body. a reset protection unit, an alarm unit, and a rectification and filtering unit, wherein The input end and the output end of the manual power-off reset protection unit are respectively connected with the power line and the load of the socket body, the alarm unit is connected with the rectification and filtering unit, and the rectification and filtering unit is connected to the manual power-off reset protection unit. Between the input and the load, and

The manual power-off reset protection unit automatically disconnects the load circuit when the load is overloaded, and the alarm unit sends an alarm signal. After the load circuit is disconnected, the manual power-off reset protection unit can be turned back on only by manually disconnecting the power supply.

The manual power-off reset protection unit comprises a base, a metal temperature sensitive sheet, a static contact, a movable contact, an insulating sheet, an electrical connecting piece, a PTC heating piece, a PTC fixing piece and a sleeve, wherein the metal temperature sensing piece One end is fixed to the inner side of the base, and the other end of the metal heat sensitive sheet is a free end. The movable end of the metal heat sensitive sheet is provided with a movable contact, and the electrical connecting piece is disposed on the upper part of the base, and the moving The corresponding part of the contact is provided with a static contact, and a PTC heating piece is arranged on the upper part of the electrical connection piece. The electrodes of the PTC heating piece are respectively connected with the power line and the rectifying and filtering unit, and the PTC heating piece is fixed by the PTC fixing piece, and the PTC fixing piece is fixed. The PTC fixing piece and the base and the electrical connecting piece are separated by an insulating sheet, and the sleeve is sleeved on the outside of the base and the PTC fixing piece.

The base is a U-shaped metal trough body, and one end end thereof is provided with an electrical connection terminal extending outward. One end of the metal temperature sensitive sheet is fixed to the inner bottom of the base, and the upper end of the free end of the metal temperature sensitive sheet is provided with a movable contact.

The metal temperature sensing piece is a nickel manganese metal piece, and the static contact and the moving contact are silver alloy contacts.

One end of the electrical connecting piece is provided with an outwardly extending electrical connection terminal, and a static contact is provided on the lower side of the electrical connecting piece.

The alarm unit is a light-emitting diode D2, a buzzer or a combination thereof.

The rectifying and filtering unit is formed by serially connecting the diode D1, the capacitor C1 and the diode D3, and the input end of the diode D1 is connected to the input end of the power-off reset protection unit, and the diode D3 is connected between the power-off reset protection unit and the load. .

The contribution of the present invention is that it effectively solves the problem of multiple protections of overloading with electrical load overload. Because the invention is provided with an alarm unit and a manual power-off reset protection unit, and the manual power-off reset protection The unit provides a permanent open circuit protection for the electrical load, so that when the overloaded over temperature occurs, the alarm signal can be sent in real time for early maintenance and elimination of the fault point. At the same time, since the socket must be reset to be turned on, it is ensured that the cause of the disconnection circuit or the fault point has been eliminated, and the reset can be performed. The above double protection can effectively ensure the safe use of the electric equipment. The invention can be widely applied to overload over temperature protection of various household appliances and electronic products.

[Description of the Drawings]

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the outline of the present invention

Figure 2 is a schematic view of the structure of the present invention.

Figure 3 is a cross-sectional view showing the structure of the manual power-off reset protection unit of the present invention.

4 is an exploded perspective view showing the components of the manual power-off reset protection unit of the present invention.

Figure 5 is a circuit schematic of the present invention.

【detailed description】

The following examples are intended to further illustrate and illustrate the invention and are not to be construed as limiting.

Referring to Figure 1, the manually reset overload over-temperature protection power socket of the present invention includes a socket body 10, a manual power-off reset protection unit 20, an alarm unit 30, and a rectification filtering unit 40.

The socket body 10 can be any known three-hole power socket. As shown in Fig. 1, in the embodiment, the socket body 10 is formed by screwing the upper cover 11 and the lower cover 12 by screws. A plurality of sets of three-eye jacks 111 are provided on the upper cover 11, and a power plug for connecting a load can be inserted therein. A manual power-off reset protection unit 20, an alarm unit 30, and a rectification and filtering unit 40 are provided in the socket body 10. As shown in FIG. 2, the manual power-off reset protection unit 20, the alarm unit 30, and the rectification filter unit 40 are installed in the flat casing 50, and the casing 50 is fixed to the inner side of the upper cover 11 of the socket body by the power line. Introduce one end.

As shown in FIG. 3 and FIG. 4, the manual power-off reset protection unit 20 includes a base 21 and a metal. The temperature sensing sheet 22, the stationary contact 23, the movable contact 24, the insulating sheet 25, the electrical connecting piece 26, the PTC heating piece 27, the PTC fixing piece 28, and the sleeve 29. As shown in FIG. 4, the base 21 is an open-shaped U-shaped metal groove-like body, and a bottom portion thereof protrudes outward to form an electrical connection piece receiving groove 212. One end of the base is provided with an outwardly extending electrical connection. The terminal 211, the power line of the socket body J1 is connected to the electrical connection terminal 211. The metal temperature sensing sheet 22 is a metal sheet which is expandable and deformable with a change in temperature. In the embodiment, the metal temperature sensing sheet 22 is an elliptical metal sheet made of a nickel manganese alloy. As shown in FIG. 3, one end of the metal temperature sensing sheet 22 is riveted and fixed in the electrical connection piece receiving groove 212 of the base, and the other end of the metal temperature sensing piece is a free end, and the metal temperature sensing piece is upwardly curved in an arc shape, and The stationary contact 23 on the electrical connection piece 26 is in contact closure. A movable contact 24 is fixed to the upper side of the free end. The electrical connecting piece 26 is a metal sheet-like body, and is disposed on an upper portion of the base 21, and a static contact 23 is fixedly fastened to a portion corresponding to the movable contact 24 on a lower side of the electrical connecting piece 26, and the static contact is fixed. 23 is closed by contact with the movable contact 24 through the insulating sheet 25. One end of the electrical connection piece 26 is provided with an outwardly extending electrical connection terminal 261 to which a power supply line connected to the load J2 is connected. In this embodiment, the static contact 23 and the movable contact 24 are silver alloy contacts. In FIG. 3, a PTC heating element 27 is disposed on the upper portion of the electrical connection piece 26, and an upper portion of the PTC heating piece 27 is pressed and fixed by the PTC fixing piece 28, and the electrodes of the PTC heating piece 27 and the power supply line of the socket main body J1 are rectified and filtered. Unit 40 is connected. When the temperature or the load current exceeds the normal value, the metal temperature sensing sheet 22 induces a jump, so that the stationary contact 23 and the movable contact 24 are separated to cut off the power. At this time, a voltage is generated at both ends of the PTC heating element 27, and the generated heat keeps the metal temperature sensing sheet 22 from rebounding to maintain a continuous power-off action. As shown in Fig. 4, the PTC fixing piece 28 is a downwardly-shaped metal groove-like body corresponding to the shape of the base 21, and the top thereof is provided with a downward projection for pressing the PTC heating piece 27. Both sides of the PTC fixing piece 28 are press-fitted to the outside of the electrical connection piece accommodating groove 212 of the susceptor to form an electrical connection. As shown in FIG. 4, the PTC fixing piece 28 and the base 21 and the electrical connecting piece 26 are separated by an insulating sheet 25. In this embodiment, the insulating sheet 25 is an insulating paper which is folded and fixed between the PTC fixing piece 28 and the base 21 and the electrical connecting piece 26 to provide an insulating function. A sleeve 29 is sleeved on the outside of the connected base 21 and the PTC fixing piece 28, and the sleeve is a nipple, which serves to insulate and protect the device. As shown in FIG. 5, the alarm unit 30 may be a light-emitting diode D2, a buzzer (not shown), or a combination of a light-emitting diode D2 and a buzzer. The light-emitting diode D2 is an alarm light-emitting diode, which is connected with the diodes D1, D3 and the capacitor C1 of the rectifying and filtering unit 40 to realize a flashing alarm, and can be alarmed by a red-blue double-flashing method when an alarm occurs. The buzzer can realize an audible alarm. In this embodiment, the alarm unit 30 is a combination of the light-emitting diode D2 and the buzzer, which can emit a flashing and buzzing sound when the load is overloaded and over-temperature, thereby realizing the sound and light alarm of the overload and over-load of the load, so that the user can Timely check and repair faults that cause load overload and over temperature.

As shown in FIG. 5, the rectifying and filtering unit 40 is formed by serially connecting a diode D1, a capacitor C1, and a diode D3. The input end of the diode D1 is connected to the power line of the socket body J1 at the input end of the manual power-off reset protection unit 20. The diode D3 is connected in parallel with the load, and the other end is connected to the LED D2 and the capacitor C1. The rectifying and filtering unit 40 is configured to convert the AC of the socket body J1 into DC power for use by the manual power-off reset protection unit 20 and the alarm unit 30.

The working principle of the present invention is as shown in FIG. 5. When the load J2 (which may be a household appliance or an electronic product) connected to the manually reset overload over-temperature protection power socket of the present invention works normally, the manual power-off in the power socket The static contact 23 and the movable contact 24 of the reset protection unit 20 are in a closed state, the voltage between the input terminal and the output terminal of the manual power-off reset protection unit 20 is zero, and the PTC heater chip 27 is in an inoperative state. When the load reaches the set temperature due to overload or other reasons, the flashing alarm signal is first sent by the alarm unit 30, or a buzzer sound is sounded by the buzzer (not shown). The metal temperature sensing sheet 22 induces a bouncing, so that the movable contact 24 and the stationary contact 23 are immediately disconnected, and the load power source is cut off. Under the action of the power supply voltage, the PTC heating element 27 starts to generate heat and maintains the metal temperature sensing sheet 22 at a constant temperature. Since the PTC heating element 27 is in a high resistance state, the load circuit is equivalent to an open circuit, and the load stops working, thereby obtaining safety. protection. Even if the abnormal temperature has returned to normal, since the metal temperature sensitive sheet 22 is heated by the PTC heating sheet 27, it is still in an off state to prevent the movable contact 24 and the stationary contact 23 from being closed before the failure has been eliminated, resulting in load damage. Only manually cut off the power supply (ie unplug the manual reset overload over temperature protection After the power socket is removed and the fault is removed, the PTC heating element 27 is restored to the normal temperature state, and the movable contact 24 and the stationary contact 23 can be closed, so that the manual power-off reset protection unit 20 is restored to conduction. In addition, at the moment when the movable contact 24 and the stationary contact 23 are disconnected, the load current can still form a loop through the PTC heating fin 27 to avoid arcing on the movable contact 24 of the metal heat sensitive sheet 22, thereby prolonging the metallic feeling. The life of the temperature film.

Thereby, the present invention can ensure the reset of the device under the premise that the fault has been completely eliminated by the protection of the manual power-off reset protection unit 20 and the alarm unit 30, so as to effectively protect the safety of the powered device.

Although the present invention has been disclosed by the above embodiments, the scope of the present invention is not limited thereto, and variations, substitutions, and the like of the above components will fall within the scope of the present invention. Within the scope of the claims.

Claims

Rights request

1. A manual reset overload and over-temperature protected power socket, including a socket body (10), characterized in that a manual power-off reset is provided in the socket body (10) to automatically disconnect the load circuit when the load is over-temperature. Protection unit (20), alarm unit (30) and rectification and filtering unit (40), wherein the input end and output end of the manual power-off reset protection unit (20) are respectively connected to the power live wire and load of the socket body (10) are connected, the alarm unit (30) is connected in parallel with the rectifier and filter unit (40), and the rectifier and filter unit (40) is connected in parallel between the input end of the manual power-off reset protection unit (20) and the load, and

The manual power-off reset protection unit (20) automatically disconnects the load circuit when the load is overloaded and over-temperature, and at the same time the alarm unit (30) sends an alarm signal. After the load circuit is disconnected, manual power-off reset can only be achieved by manually disconnecting the power supply. The protection unit (20) returns to conduction.

2. The manually reset overload and overtemperature protected power socket according to claim 1, characterized in that the manual power-off reset protection unit (20) includes a base (21), a metal temperature sensing sheet (22), a static Contact (23), moving contact (24), insulating piece (25), electrical connecting piece (26), PTC heating piece (27), PTC fixed piece (28) and sleeve (29), wherein, the One end of the metal temperature sensing piece (22) is fixed to the inside of the base (21), and the other end of the metal temperature sensing piece is a free end. A moving contact (24) is provided at the free end of the metal temperature sensing piece, and the electrical connection The piece (26) is provided on the upper part of the base (21), and a static contact (23) is provided on the part corresponding to the movable contact (24). A PTC heating piece is provided on the upper part of the electrical connection piece (26). (27), the electrodes of the PTC heating piece (27) are connected to the power live wire and the rectifier filter unit (40) respectively, the PTC heating piece (27) is fixed by the PTC fixing piece (28), and the PTC fixing piece (28) is connected to the base (21) are connected, the PTC fixed piece (28) and the base (21) are separated from the electrical connection piece (26) by an insulating piece (25), and the sleeve (29) is placed on the base (21) and the outside of the PTC retainer (28).

3. The manually reset overload and overtemperature early warning protection device according to claim 2, characterized in that the base (21) is a U-shaped metal trough-shaped body, one end of which is provided with an electrical connection extending outward. Connect terminal (211).

4. The manually reset overload and overtemperature early warning protection device according to claim 2, characterized in that one end of the metal temperature sensing sheet (22) is fixed to the inner bottom of the base (21), and the metal temperature sensing sheet (22) ) is provided with a movable contact (24) on the upper side of the free end.

5. The manually reset overload and overtemperature early warning protection device according to claim 4, characterized in that the metal temperature sensing sheet (22) is a nickel-manganese alloy metal sheet, and the static contact (23) and the moving contact ( 24) are silver alloy contacts.

6. The manually reset overload and overtemperature early warning protection device according to claim 2, characterized in that one end of the electrical connection piece (26) is provided with an outwardly extending electrical connection terminal (261), The lower side of the connecting piece is provided with a static contact (23).

7. The manually reset overload and overtemperature early warning protection device according to claim 1, characterized in that the alarm unit (30) is a light-emitting diode D2, a buzzer or a combination thereof.

8. The manually reset overload and overtemperature early warning protection device according to claim 1, characterized in that the rectification and filtering unit (40) is composed of a diode D1, a capacitor Cl, and a diode D3 connected in series in sequence, and the diode D1 The input terminal is connected in parallel to the input terminal of the manual power-off reset protection unit (20), and the diode D3 is connected in parallel between the manual power-off reset protection unit (20) and the load.