CN211183414U

CN211183414U - Spark protection device of hand warmer

Info

Publication number: CN211183414U
Application number: CN202020105686.1U
Authority: CN
Inventors: 关铭佳
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-02
Filing date: 2020-01-17
Publication date: 2020-08-04
Anticipated expiration: 2030-01-17

Abstract

The utility model particularly relates to a hand warmer spark protection device, including switching power supply circuit, detection circuitry, heating control circuit and switching circuit, wherein still be equipped with interconnection coupler, interconnection coupler includes utensil output socket and plug connector, and plug connector is equipped with N utmost point, P utmost point, L utmost point and S utmost point to N utmost point, P utmost point, L utmost point and S utmost point are connected respectively in detection circuitry, utensil output socket is equipped with first current-carrying bolt L1, second current-carrying bolt N1, third current-carrying bolt P1 and fourth signal bolt S1, and fourth signal bolt S1 is connected in the probe, and first current-carrying bolt L1, second current-carrying bolt N1, third current-carrying bolt P1 are connected respectively in heating control circuit.

Description

Spark protection device of hand warmer

Technical Field

The utility model relates to a hand warmer technical field, concretely a hand warmer spark protection device.

Background

The hand warmer is used as a portable heating appliance, needs to be connected with an external power supply when being electrified and heated, is disconnected with the power supply when being used, and is generally realized by adopting an interconnection coupler for realizing the purpose.

Most products in the market at present assemble the explosion-proof clamp with the interconnection coupler, and the circuit design is the normal open mode, and when using, under the condition of connecting external power supply, the plug connector is inserted into the appliance output socket and generates electric arc due to current, serious people can burn and melt, even burn and fire, and the power plug can be ignited by plugging the interconnection coupler first and then connecting the external power supply.

In order to solve the problems, the device is innovatively designed in structure and circuit.

Disclosure of Invention

An object of the utility model is to overcome above-mentioned prior art not enough, provide one kind and avoided the electric arc spark to produce, play the hand warmer spark protection device of safety protection effect.

The utility model discloses a hand warmer spark protection device of description, including switching power supply circuit, detection circuitry, heating control circuit and switch circuit, switching power supply circuit connects respectively in detection circuitry and switch circuit and for detection circuitry and switch circuit provide the electric energy, switch circuit is used for controlling detection circuitry's operating condition, wherein: the interconnection coupler is also arranged and comprises an appliance output socket and a plug connector;

the plug connector is provided with an N pole, a P pole, an L pole and an S pole, the N pole, the P pole and the L pole are the same in length, the S pole is shorter than the N pole, the P pole and the L pole, and each pole of the plug connector is connected with the detection circuit;

the appliance output socket is provided with a first current-carrying bolt L1, a second current-carrying bolt N1, a third current-carrying bolt P1 and a fourth signal bolt S1, wherein the first current-carrying bolt L1, the second current-carrying bolt N1 and the third current-carrying bolt P1 are respectively connected with the heating control circuit, and the fourth signal bolt S1 is connected with the probe;

when the interconnection coupler is coupled, the N pole of the plug connector is in contact communication with the second current-carrying pin N1 of the appliance output socket, the P pole of the plug connector is in contact communication with the third current-carrying pin P1 of the appliance output socket, the L pole of the plug connector is in contact communication with the first current-carrying pin L1 of the appliance output socket, and the S pole of the plug connector is in contact communication with the fourth signal pin S1 of the appliance output socket.

When the plug connector is inserted into the appliance output socket, the N pole, the P pole and the L pole contacts are firstly connected, then the S pole of the signal contact is connected, when the plug connector is pulled out of the appliance output socket, the S pole of the signal contact is firstly disconnected, and the N pole, the P pole and the L pole contact are then disconnected.

The detection circuit comprises a first triode Q1, a fourth capacitor C4, a fifth resistor R5, a fifth capacitor C5, a sixth capacitor C6, an inclination angle switch K1, a seventh resistor R7, a third diode D3, a sixth resistor R6, an eighth resistor R8, a second triode Q2, a third triode Q3, a relay JQ and a current-carrying contact JK, wherein the collector of the first triode Q1 is connected with a D end, the base of the first triode Q1 is connected with the fourth capacitor C4, the emitter of the first triode Q1 is connected with the fifth capacitor C1, the fourth capacitor C1 is connected with the fifth resistor R1, the sixth capacitor C1, the inclination angle switch K1 and the seventh resistor R1 are sequentially connected, the collector of the second triode Q1 is connected with the base of the third triode Q1, the relay JQ is connected with the pole of the third triode Q1, the inclination angle switch K1 is connected with the base of the third diode JQ 366, the plug-in parallel with the power source plug-in-phase, and the plug-in-phase connector of the relay JQ 366.

The heating control circuit comprises a temperature controller K2, a fuse K3 and a heater, wherein one pole of the heater is connected with one end of the temperature controller K2 and leads out a common end P1, the other pole of the heater is connected with one end of the fuse K3, the other end of the fuse K3 is led out to be connected with a second current-carrying bolt N1, and the other end of the temperature controller K2 is led out to be connected with a first current-carrying bolt L1.

The switch circuit comprises an integrator IC2, a touch KEY KEY, a seventh capacitor C7 and an eighth capacitor C8, wherein the touch KEY KEY is connected with a pin 1 of the integrator IC2, a pin 2 and a pin 3 of the integrator IC2 are connected in parallel with an eighth capacitor C8, a pin 4 and a pin 5 of the integrator IC2 are connected in parallel with a seventh capacitor C7, a pin 6 of the integrator IC2 is connected with a D end,

and the mechanical switch SW is connected to the end D.

The switching power supply circuit comprises an integrator IC1, a first diode D1, a first capacitor C1, a second capacitor C2, a first resistor R1, a second resistor R2, a third resistor R3, a transformer T, a third capacitor C3, a fourth resistor R4 and a second diode D2; the first diode D1 and the first capacitor C1 are connected, common ends of the first diode D1 and the first capacitor C1 are respectively connected to a pin 5 and a pin 6 of the integrator IC1, an anode of the second capacitor C2 is connected to a pin 1 of the integrator IC1, one end of the first resistor R1 is connected with a cathode of the second capacitor C2 and then connected to a pin 8 of the integrator IC1, the other end of the first resistor R1 is connected with one end of the second resistor R2 and then connected to a pin 2 of the integrator IC1 and a cathode of an input end of the transformer T, the other end of the second resistor R2 is connected with one end of the third resistor R3 and then connected to a pin 3 of the integrator IC1, the other end of the third resistor R3 is connected to an anode of the input end of the transformer T, one side of the third capacitor C3 and the fourth resistor R4 is commonly connected to a cathode of the second diode D2, the other side of the third capacitor C3 and the other side of the fourth resistor R4 are commonly connected to an anode of the output end of the transformer T2.

The utility model has the advantages that: the structure combines the interconnection coupler, the detection circuit and the heating control circuit, so that no arc spark is generated when the plug connector is inserted into or pulled out of the appliance output socket, and the safety protection effect is realized on the product.

Drawings

Fig. 1 is a circuit diagram of the switching power supply of the present invention.

Fig. 2 is a connection diagram of the detection circuit and the heating control circuit of the present invention.

Fig. 3 is a circuit diagram of the switch of the present invention.

Fig. 4 is a circuit diagram of the mechanical switch SW.

Fig. 5 is a schematic structural diagram of the plug connector of the present invention.

Fig. 6 is a rear view of the structure of fig. 5.

Fig. 7 is a schematic diagram of an appliance outlet socket configuration.

The reference numbers are as follows:

a switching power supply circuit 1, a detection circuit 2, a heating control circuit 3, a heater 301, a switching circuit 4, an appliance output socket 5, a plug connector 6, an N pole 601, a P pole 602, an L pole 603, and an S pole 604.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 to 6, the utility model discloses a hand warmer spark protection device of description, including switching power supply circuit 1, detection circuitry 2, heating control circuit 3 and switching circuit 4, switching power supply circuit 1 connects respectively in detection circuitry 2 and switching circuit 4 and for detection circuitry 2 and switching circuit 4 provide the electric energy, and switching circuit 4 is used for controlling the operating condition of detection circuitry 2, wherein: an interconnection coupler is also provided, the interconnection coupler comprising an appliance output socket 5 and a plug connector 6;

the plug connector 6 is provided with an N pole 601, a P pole 602, an L pole 603 and an S pole 604, the N pole 601, the P pole 602 and the L pole 603 are the same in length, the S pole 604 is shorter than the N pole 601, the P pole 602 and the L pole 603, and each pole of the plug connector is connected with a detection circuit;

the appliance output socket 5 is provided with a first current-carrying bolt L1, a second current-carrying bolt N1, a third current-carrying bolt P1 and a fourth signal bolt S1, wherein the first current-carrying bolt L1, the second current-carrying bolt N1 and the third current-carrying bolt P1 are respectively connected with the heating control circuit 3, and the fourth signal bolt S1 is connected with the probe;

when the interconnection coupler is coupled, the N pole 601 of the plug connector 6 is in contact communication with the second current carrying pin N1 of the appliance output socket 5, the P pole 602 of the plug connector is in contact communication with the third current carrying pin P1 of the appliance output socket 5, the L pole 603 of the plug connector 6 is in contact communication with the first current carrying pin L1 of the appliance output socket 5, and the S pole 604 of the plug connector 6 is in contact communication with the fourth signal pin S1 of the appliance output socket 5.

The structure combines the interconnection coupler, the detection circuit 2 and the heating control circuit 3, when the appliance output socket 5 and the plug connector 6 are connected or separated, the heating control circuit 3 is powered off firstly, arc sparks are avoided, and a safety protection effect is achieved.

The utility model discloses a detection circuitry 2 includes first triode Q1, fourth electric capacity C4, fifth resistance R5, fifth electric capacity C5, sixth electric capacity C6, dip angle switch K1, seventh resistance R7, third diode D3, sixth resistance R6, eighth resistance R8, second triode Q2, third triode Q3, relay JQ and current-carrying contact JK, the D end is connected to the collector of first triode Q1, the base of first triode Q1 is connected with fourth electric capacity C4, the emitter of first triode Q1 is connected with fifth electric capacity C1, fourth electric capacity C1 is connected with fifth resistance R1, sixth electric capacity C1, dip angle switch K1 and seventh resistance R1 link gradually, the collector of second triode Q1 is connected with the base of third triode Q1, JQ 1 is connected with the JQ 1' S, JQ is connected with the JQ 366 of the JQ and the JQ 1 of the current-carrying contact of the JK, the JQ 1 is connected with the JQ switch, the JQ 366 power source of the JQ 366 is connected with the JQ plug-in parallel connection of the power source, the JQ 366 is connected with the power source of the JQ 366, the JQ plug-in parallel connection of the JQ switch, the JQ 366 of the JQ 1, the JQ 366, the JQ.

The heating control circuit 3 comprises a temperature controller K2, a fuse K3 and a heater 301, one pole of the heater 301 is connected with one end of the temperature controller K2 and leads out a common end P1, the other pole of the heater 301 is connected with one end of the fuse K3, the other end of the fuse K3 is led out to be connected with a second current-carrying bolt N1, and the other end of the temperature controller K2 is led out to be connected with a first current-carrying bolt L1.

The switch circuit 4 comprises an integrator IC2, a touch KEY, a seventh capacitor C7, an eighth capacitor C8 and a mechanical switch SW, wherein the touch KEY is connected to pin 1 of the integrator IC2, pin 2 and pin 3 of the integrator IC2 are connected in parallel to form an eighth capacitor C8, pin 4 and pin 5 of the integrator IC2 are connected in parallel to form a seventh capacitor C7, pin 6 of the integrator IC2 is connected with a D terminal, and the mechanical switch SW is connected to the D terminal.

The switching power supply circuit 1 comprises an integrator IC1, a first diode D1, a first capacitor C1, a second capacitor C2, a first resistor R1, a second resistor R2, a third resistor R3, a transformer T, a third capacitor C3, a fourth resistor R4 and a second diode D2; the first diode D1 and the first capacitor C1 are connected, common ends of the first diode D1 and the first capacitor C1 are respectively connected to a pin 5 and a pin 6 of the integrator IC1, an anode of the second capacitor C2 is connected to a pin 1 of the integrator IC1, one end of the first resistor R1 is connected with a cathode of the second capacitor C2 and then connected to a pin 8 of the integrator IC1, the other end of the first resistor R1 is connected with one end of the second resistor R2 and then connected to a pin 2 of the integrator IC1 and a cathode of an input end of the transformer T, the other end of the second resistor R2 is connected with one end of the third resistor R3 and then connected to a pin 3 of the integrator IC1, the other end of the third resistor R3 is connected to an anode of the input end of the transformer T, one side of the third capacitor C3 and the fourth resistor R4 is commonly connected to a cathode of the second diode D2, the other side of the third capacitor C3 and the other side of the fourth resistor R4 are commonly connected to an anode of the output end of the transformer T2.

When the touch is effective, the output voltage of the end D is loaded to the collector of the first triode Q1 to drive the detection circuit 2, and the detection circuit 2 is switched on to heat the heater 301 through the relay JQ.

In addition, the mechanical switch SW is of a self-locking type: one end of the mechanical switch SW is connected with VCC, the normally open contact is connected to the end D and then connected with the collector of the detection triode Q1, the switch SW contact is pressed to be switched on, and due to the self-locking function, VCC voltage is loaded to the collector of the first triode Q1 to drive the detection circuit 2, and then the heater 301 is switched on to heat through the relay JQ.

When the plug connector 6 is completely inserted into the appliance output socket 5 and then connected with an external power supply, the power supply is switched off under the control of the switch, the heating control circuit 2 is not electrified, the power supply is switched on after the switch is started, the heating control circuit 3 is electrified, and the heater 301 is heated.

The present invention is not limited to the above preferred embodiments, and any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a hand warmer spark protection device, includes switching power supply circuit (1), detection circuitry (2), heating control circuit (3) and switch circuit (4), switching power supply circuit (1) is connected respectively in detection circuitry (2) and switch circuit (4) and for detection circuitry (2) and switch circuit (4) provide the electric energy, switch circuit (4) are used for controlling the operating condition of detection circuitry (2), its characterized in that: an interconnection coupler is also provided, the interconnection coupler comprises an appliance output socket (5) and a plug connector (6);

the plug connector (6) is provided with an N pole (601), a P pole (602), an L pole (603) and an S pole (604), the N pole (601), the P pole (602) and the L pole (603) are the same in length, the S pole (604) is shorter than the N pole (601), the P pole (602) and the L pole (603), and each pole of the plug connector (6) is connected with the detection circuit (2);

the appliance output socket (5) is provided with a first current-carrying bolt L1, a second current-carrying bolt N1, a third current-carrying bolt P1 and a fourth signal bolt S1, wherein the first current-carrying bolt L1, the second current-carrying bolt N1 and the third current-carrying bolt P1 are respectively connected with the heating control circuit (3), and the fourth signal bolt S1 is connected with the probe;

when the interconnection coupler is coupled, the N pole (601) of the plug connector (6) is in contact communication with the second current-carrying pin N1 of the appliance output socket (5), the P pole (602) of the plug connector is in contact communication with the third current-carrying pin P1 of the appliance output socket (5), the L pole (603) of the plug connector (6) is in contact communication with the first current-carrying pin L1 of the appliance output socket (5), and the S pole (604) of the plug connector (6) is in contact communication with the fourth signal pin S1 of the appliance output socket (5);

when the plug connector (6) is inserted into the appliance output socket (5), the contacts of the N pole, the P pole and the L pole are firstly switched on, and then the contacts of the signal terminal are connected with the S pole, when the plug connector (6) is pulled out of the appliance output socket (5), the contacts of the signal terminal are firstly switched off, and the contacts of the N pole, the P pole and the L pole are then switched off.

2. The spark protection device of the hand warmer according to claim 1, wherein the detection circuit (2) comprises a first transistor Q1, a fourth capacitor C4, a fifth resistor R5, a fifth capacitor C5, a sixth capacitor C6, a tilt switch K1, a seventh resistor R7, a third diode D3, a sixth resistor R6, an eighth resistor R8, a second transistor Q2, a third transistor Q3, a relay JQ and a current-carrying contact JK, wherein the collector of the first transistor Q1 is connected to the D terminal, the base of the first transistor Q1 is connected to the fourth capacitor C4, the emitter of the first transistor Q1 is connected to the fifth capacitor C1, the fourth capacitor C1 is connected to the fifth resistor R1, the sixth capacitor C1, the tilt switch K1 and the seventh resistor R1 are connected in sequence, the collector of the second transistor Q1 is connected to the base of the third transistor Q1, the collector of the third transistor JQ 1 is connected to the base of the external current-carrying contact JQ plug connector (S) and the external current-carrying contact (JQ) is connected to the external current-carrying contact (JQ 366) of the external plug-carrying relay (JQ 1, the external current-carrying contact (JQ) and the external plug-carrying contact (JQ) is connected to the external plug-connected to the power supply terminal of the external plug-connected to the transistor Q1.

3. The spark protection device for the hand warmer of claim 1, wherein the heating control circuit (3) comprises a temperature controller K2, a fuse K3 and a heater (301), one pole of the heater (301) is connected with one end of the temperature controller K2 and leads out a common end P1, the other pole of the heater (301) is connected with one end of the fuse K3, the other end of the fuse K3 is led out to be connected with a second current-carrying pin N1, and the other end of the temperature controller K2 is led out to be connected with a first current-carrying pin L1.

4. The hand warmer spark protection device of claim 1, wherein: the switch circuit (4) comprises an integrator IC2, a touch KEY KEY, a seventh capacitor C7 and an eighth capacitor C8, wherein the touch KEY KEY is connected to a pin 1 of the integrator IC2, a pin 2 and a pin 3 of the integrator IC2 are connected in parallel with an eighth capacitor C8, a pin 4 and a pin 5 of the integrator IC2 are connected in parallel with a seventh capacitor C7, and a pin 6 of the integrator IC2 is connected with a D end.

5. The hand warmer spark protection device of claim 1, wherein: and the mechanical switch SW is connected to the end D.

6. The hand warmer spark protection device of claim 1, wherein: the switching power supply circuit (1) comprises an integrator IC1, a first diode D1, a first capacitor C1, a second capacitor C2, a first resistor R1, a second resistor R2, a third resistor R3, a transformer T, a third capacitor C3, a fourth resistor R4 and a second diode D2; the first diode D1 and the first capacitor C1 are connected, common ends of the first diode D1 and the first capacitor C1 are respectively connected to a pin 5 and a pin 6 of the integrator IC1, an anode of the second capacitor C2 is connected to a pin 1 of the integrator IC1, one end of the first resistor R1 is connected with a cathode of the second capacitor C2 and then connected to a pin 8 of the integrator IC1, the other end of the first resistor R1 is connected with one end of the second resistor R2 and then connected to a pin 2 of the integrator IC1 and a cathode of an input end of the transformer T, the other end of the second resistor R2 is connected with one end of the third resistor R3 and then connected to a pin 3 of the integrator IC1, the other end of the third resistor R3 is connected to an anode of the input end of the transformer T, one side of the third capacitor C3 and the fourth resistor R4 is commonly connected to a cathode of the second diode D2, the other side of the third capacitor C3 and the other side of the fourth resistor R4 are commonly connected to an anode of the output end of the transformer T2.