Lamp self-adaptive cut-off device and lamp

Abstract

The utility model relates to a lamp self-adaptive cut-off device and a lamp, the lamp self-adaptive cut-off device is provided with a servo circuit and a double-pole relay, the servo circuit is electrically connected with a coil of the double-pole relay, and two groups of contacts of the double-pole relay are respectively and correspondingly positioned on an external zero line and an external live line. The servo circuit is connected with an external zero line and an external live line. According to the utility model, after the control switch is switched off, the alternating current loop of the lamp is physically and completely switched off, that is, the power grid is completely cut off, that is, leakage current cannot be generated when the lamp is in a closed state, and the phenomenon of slight light cannot be generated. And meanwhile, after the external control switch is switched off, the power grid is completely cut off, so that no potential safety hazard exists even if the control switch is wrongly connected or a single switch is used for double-live-wire line voltage.

Description

Technical Field

[0001] The utility model relates to the technical field of lamps, and in particular to a lamp adaptive cutting device and a lamp with the lamp adaptive cutting device. Background Art

[0002] For lamps with metal shells, the lamp shell is grounded after installation. Because the light-emitting device of the lamp generates a lot of heat during the light-emitting process, the light-emitting module PCB inside the lamp is generally close to the shell to achieve the function of heat dissipation for the light-emitting module. However, in real life, it is easy to mistakenly connect the control switch to the neutral line or use dual live wires for power supply during the wiring process of lamps, that is, the line voltage power supply. The grid voltage is 100-127V, and in most cases only a single-cut switch is used. When the single-cut switch is turned off, the live wire of the AC power supply is still connected to the power supply inside the lamp. Taking LED lamps as an example, although the overall working circuit of the driving circuit inside the LED lamp has been disconnected, there is still a small leakage current of AC through the LED circuit board inside the lamp to the ground to form a loop, making the LED lamp appear slightly bright at night, and there are also some safety hazards if the lamp does not cut off the AC live wire. The mechanism of the generation of this slight brightness is that the lamp control switch S1 is connected to the neutral line or the working circuit of the double live wire single switch Figure 1-Figure 3 shown.

[0003] The above problems are very common in the LED industry, especially for lamps with metal structures. When the user's usage scenario meets the above conditions, this phenomenon will occur. To avoid this situation, the industry mostly adopts measures such as adding resistance or capacitance to both ends of the LED device to avoid the production of the dimming phenomenon. This is essentially to bypass the leakage current to the equivalent capacitor Co through the added resistance or capacitance, such as the application number 202021865134.7, to avoid the leakage current passing through the LED chip and causing the dimming phenomenon. However, such a solution does not eliminate the leakage current from the source, nor does it solve the safety hazard that the LED power supply and LED module are always energized after turning off the lights.

[0004] Therefore, in view of the shortcomings of the prior art, it is necessary to provide a lamp adaptive cutting-off device and a lamp having the lamp adaptive cutting-off device to solve the shortcomings of the prior art. Utility Model Content

[0005] One of the purposes of the utility model is to avoid the shortcomings of the prior art and provide a lamp self-adaptive cut-off device. The lamp self-adaptive cut-off device can physically and completely cut off the power grid when the control switch is turned off.

[0006] The above-mentioned purpose of the utility model is achieved through the following technical measures:

[0007] A lamp adaptive cutting device is provided, which is provided with a servo circuit and a double-pole relay, wherein the servo circuit is electrically connected to the coil of the double-pole relay, two groups of contacts of the double-pole relay are respectively located corresponding to an external neutral line and an external live line, and the servo circuit is respectively connected to the external neutral line and the external live line.

[0008] Preferably, the servo circuit is a linear regulator step-down circuit, a switching power supply or a capacitor step-down type voltage regulator circuit.

[0009] Preferably, the servo circuit is a capacitor step-down voltage stabilization circuit.

[0010] Preferably, the capacitor step-down voltage stabilizing circuit is provided with a resistor R1, a capacitor C1, a rectifier bridge D1, a coupling capacitor C2, a resistor R2, a resistor R3, a zener diode D2 and a diode D3, and the double-pole relay is defined as a relay K1, a connection end A of the rectifier bridge D1 is connected in series with the resistor R1 and the external live wire, a connection end A of the rectifier bridge D1 is also connected in series with the capacitor C1 and the external live wire, a connection end B of the rectifier bridge D1 is connected to the external neutral wire, and a connection end D of the rectifier bridge D1 is connected to the coupling capacitor C2. The positive electrode is connected, the negative electrode of the coupling capacitor C2 is connected to the connection end B of the rectifier bridge D1, the connection end D of the rectifier bridge D1 is also connected in series with a resistor R2 and connected to the connection end B, the connection end D of the rectifier bridge D1 is also connected in series with a resistor R3 and connected to one end of the coil of the relay K1, one end of the coil of the relay K1 is also connected to the negative electrode of the voltage-stabilizing diode D2 and the negative electrode of the diode D3 respectively, the other end of the coil of the relay K1, the positive electrode of the voltage-stabilizing diode D2 and the positive electrode of the diode D3 are respectively connected to the connection end B of the rectifier bridge D1.

[0011] Preferably, the resistor R1 is a discharge resistor of the capacitor C1.

[0012] Preferably, the resistor R3 is a blocking resistor.

[0013] Preferably, the diode D3 is a reverse discharge diode of the coil of the relay K1.

[0014] Preferably, the output voltage of the above-mentioned relay K1 is DC5~36V, the capacitor C1 is a thin film capacitor with a withstand voltage greater than 400V, the resistance value of the resistor R1 is 100 kiloohms~1 megohms, the withstand voltage range of the rectifier bridge D1 is 600V~1000V and the voltage is greater than 0.5A, the coupling capacitor C2 is an electrolytic capacitor or a chip resistor with a capacity of 1 microfarad~470 microfarads, the resistance value of the resistor R2 is 1 kiloohm~1 megohm, the resistance value of the resistor R3 is 0 ohm~1 kiloohm, the voltage stabilization value of the voltage regulator diode D2 is 5V~40V, and the reverse withstand voltage of the diode D3 is greater than 50V.

[0015] Another object of the utility model is to avoid the shortcomings of the prior art and provide a lamp with a lamp adaptive cut-off device. The lamp with the lamp adaptive cut-off device can physically and completely cut off the power grid when the control switch is turned off.

[0016] The above-mentioned purpose of the utility model is achieved through the following technical measures:

[0017] Provided is a lamp with a lamp adaptive cut-off device, which is provided with the above-mentioned lamp adaptive cut-off device, a wiring terminal, a driver and a light-emitting module, the wiring terminal is electrically connected to the lamp adaptive cut-off device, the input end of the driver is electrically connected to the lamp adaptive cut-off device, and the output end of the driver is electrically connected to the light-emitting module.

[0018] The lamp adaptive cut-off device and the driver are independent of each other;

[0019] or

[0020] The lamp adaptive cutting device is assembled inside the driver.

[0021] The lamp of the utility model is also provided with a shell and a cover, the shell and the cover are buckled with each other, the lamp adaptive cutting device, the wiring terminal and the driver are all assembled in the shell, and the light-emitting module is integrated in the cover.

[0022] Preferably, the driver is provided with a rectifier filter circuit and a constant current and constant voltage circuit, the rectifier filter circuit is electrically connected to the lamp adaptive cut-off device and the constant current and constant voltage circuit respectively, and the constant current and constant voltage circuit is electrically connected to the light-emitting module.

[0023] The utility model discloses an adaptive cut-off device for a lamp and a lamp with the adaptive cut-off device for a lamp, wherein the adaptive cut-off device for the lamp is provided with a servo circuit and a double-pole relay, the servo circuit is electrically connected to the coil of the double-pole relay, the two sets of contacts of the double-pole relay are respectively located at an external neutral line and an external live line, and the servo circuit is respectively connected to the external neutral line and the external live line. When the control switch of the utility model is disconnected, the AC circuit of the lamp is physically and completely disconnected, that is, the power grid is completely disconnected, that is, when the lamp is in the off state, leakage current can no longer be generated, and the dim light phenomenon will no longer occur. At the same time, after the external control switch is disconnected, the power grid is completely disconnected, and there will be no safety hazard even if the control switch is connected incorrectly or a single switch is used for the double live line voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0025] Figure 1The present invention is a working circuit in which the LED lamp control switch S1 is connected to a neutral line or a double live line single switch in the prior art.

[0026] Figure 2 It is a schematic diagram of the equivalent capacitance Co formed between the circuit board and the lamp housing in the LED light-emitting module in the prior art.

[0027] Figure 3 for Figure 2 Schematic diagram of the leakage current path in .

[0028] Figure 4 This is a circuit diagram of the lamp adaptive cut-off device of Example 1.

[0029] Figure 5 This is a circuit diagram of the lamp adaptive cut-off device of Example 2.

[0030] Figure 6 This is a circuit diagram of the lamp of Example 3.

[0031] Figure 7 This is a schematic diagram of the exploded structure of the lamp of Example 3.

[0032] Figure 8 This is a schematic diagram of the exploded structure of the lamp of Example 4.

[0033] exist Figures 1 to 8 Including:

[0034] Lamp adaptive cutting device 10, servo circuit 110,

[0035] Driver 20, rectifier filter circuit 210, constant current and constant voltage circuit 220,

[0036] The connecting terminal 30 , the light emitting module 40 , the housing 50 , and the cover 60 . DETAILED DESCRIPTION

[0037] The technical solution of the utility model is further described in conjunction with the following embodiments.

[0038] Example 1

[0039] A lamp adaptive cut-off device, such as Figure 4 As shown, a servo circuit 110 and a double-pole relay are provided, the servo circuit 110 is electrically connected to the coil of the double-pole relay, the two sets of contacts of the double-pole relay are respectively located at the external neutral line and the external live line, and the servo circuit 110 is respectively connected to the external neutral line and the external live line. The servo circuit 110 of the utility model is a linear regulator step-down circuit, a switching power supply or a capacitor step-down type voltage regulator circuit. The double-pole relay in this embodiment is defined as relay K1.

[0040] This embodiment is described by taking the control switch S1 being connected to the neutral line incorrectly as an example. Figure 4 As shown, when the control switch S1 is closed, the servo circuit 110 starts to work and turns the relay K1 from a normally open state to an on state, and the AC power is normally supplied to the rear lamp through the relay K1; when the control switch S1 is disconnected, the servo circuit 110 of the relay K1 stops working due to the circuit being cut off, and the relay K1 is changed from a closed state to a normally open state, and the AC power supply and the electrical connection in the lamp are completely blocked by physical disconnection, so that the AC power supply cannot enter the interior of the lamp, thereby avoiding leakage current from the circuit to the ground, and the phenomenon of the lamp being dimly lit after turning off the light is also eliminated simultaneously.

[0041] The lamp adaptive cut-off device 10 is used in the front stage of the internal power supply of the lamp, that is, the AC input end. When the circuit is connected, the lamp adaptive cut-off device 10 will form a loop between LN or the input line voltage, and the relay K1 in the circuit changes from the normally open state to the closed state, and the circuit is connected to make the lamp work normally; when the control switch S1 is disconnected, the loop between LN or the line voltage in the lamp adaptive cut-off device 10 is also disconnected, and the relay K1 in the circuit automatically resets to the normally open state. In this way, the AC circuit of the lamp is completely disconnected physically, and the power grid is completely cut off. The lamp cannot generate leakage current when it is turned off, so there will be no LED light dimming phenomenon. At the same time, the complete disconnection of the power grid also eliminates the safety hazards caused by the user's wrong control switch connection or the double live line voltage supplying a single switch.

[0042] It should be noted that the lamp of the present invention may be an LED lamp, and may also be applicable to other types of lamps such as incandescent lamps, halogen lamps, fluorescent lamps and energy-saving lamps. The lamp of the present invention is described using an LED lamp as an example.

[0043] The adaptive lamp cut-off device 10 physically completely cuts off the AC circuit of the lamp when the control switch is turned off, that is, completely cuts off the power grid, that is, when the lamp is in the off state, no leakage current can be generated, and the dimming phenomenon will no longer occur. At the same time, the power grid is completely cut off after the external control switch is turned off, and there will be no safety hazards even if the control switch is connected incorrectly or a single switch is used for double live line voltage.

[0044] Example 2

[0045] A lamp adaptive cut-off device, such as Figure 5 As shown, other features are the same as those of the first embodiment, and the servo circuit 110 of the present embodiment is specifically a capacitor step-down type voltage stabilizing circuit.

[0046] The capacitor step-down voltage stabilizing circuit is provided with a resistor R1, a capacitor C1, a rectifier bridge D1, a coupling capacitor C2, a resistor R2, a resistor R3, a zener diode D2 and a diode D3. The double-pole relay is defined as a relay K1. The connection terminal A of the rectifier bridge D1 is connected in series with the resistor R1 and the external live wire. The connection terminal A of the rectifier bridge D1 is also connected in series with the capacitor C1 and the external live wire. The connection terminal B of the rectifier bridge D1 is connected to the external neutral wire. The connection terminal D of the rectifier bridge D1 is connected to the positive electrode of the coupling capacitor C2. , the negative electrode of coupling capacitor C2 is connected to connection terminal B of rectifier bridge D1, connection terminal D of rectifier bridge D1 is also connected in series with resistor R2 and connection terminal B, connection terminal D of rectifier bridge D1 is also connected in series with resistor R3 and one end of coil of relay K1, one end of coil of relay K1 is also connected to the negative electrode of voltage zener diode D2 and the negative electrode of diode D3 respectively, the other end of coil of relay K1, the positive electrode of voltage zener diode D2 and the positive electrode of diode D3 are respectively connected to connection terminal B of rectifier bridge D1. Among them, resistor R1 is the discharge resistor of capacitor C1; resistor R3 is the blocking resistor; diode D3 is the reverse discharge diode of coil of relay K1.

[0047] The principles of this embodiment are as follows: when the control switch S1 is closed, the AC power is stepped down by the capacitor C1, rectified by the rectifier bridge D1 and filtered by the coupling capacitor C2 to become DC power, which is driven by the resistor R3 to make the internal coil of the relay K1 close the double-pole normally closed circuit, turning on the lamp to make it work normally; when the control switch S1 is opened, the servo circuit 110 stops working due to the circuit being cut off, and the relay K1 changes from a closed state to a normally open state, physically cutting off the AC power supply of the driver 20 in the lamp.

[0048] The output voltage of the relay K1 in this embodiment is DC5-36 V. The capacitor C1 is a film capacitor with a withstand voltage greater than 400 V, preferably an X2 capacitor with safety production standard certification such as VDE UL CCC, to ensure its safety and long-term reliability.

[0049] The resistance value of resistor R1 is 100 kilo ohms to 1 megohm, the withstand voltage range of rectifier bridge D1 is 600V to 1000V and the voltage is greater than 0.5A, coupling capacitor C2 is an electrolytic capacitor or a chip resistor and the capacity is 1 microfarad to 470 microfarad. The resistance value of resistor R3 is 0 ohm to 1 kilo ohm. The resistance value of resistor R2 is 1 kilo ohm to 1 megohm, the voltage value of voltage regulator diode D2 is 5V to 40V, and the reverse withstand voltage of diode D3 is greater than 50V.

[0050] It should be noted that the resistor R2 of the utility model can also be a dummy load and may not be installed, or it can be a resistor of 1 kilo ohm to 1 megohm. The voltage regulator diode D2 can select a voltage regulator diode with a corresponding voltage regulator value according to the relays with different driving voltages. The diode D3 of this embodiment can support any form of diode, as long as the reverse withstand voltage is greater than 50V. The relay K1 can be selected to meet national safety standards such as VDE UL PSE CCC, and have corresponding safety production specification certification.

[0051] Compared with the first embodiment, the capacitor step-down voltage stabilizing circuit of the present embodiment has the advantages of simple circuit and low cost compared with the linear regulator step-down circuit and the switching power supply circuit.

[0052] Example 3

[0053] A lamp, such as Figure 6 to Figure 7 As shown, the lamp adaptive cut-off device 10, the connection terminal 30, the driver 20, the light-emitting module 40, the housing 50 and the cover 60 are provided as in Example 2, the connection terminal 30 is electrically connected to the adaptive cut-off device, the input end of the driver 20 is electrically connected to the lamp adaptive cut-off device 10, and the output end of the driver 20 is electrically connected to the light-emitting module 40. The housing 50 and the cover 60 are buckled with each other, the lamp adaptive cut-off device 10, the connection terminal 30 and the driver 20 are all assembled in the housing 50, and the light-emitting module 40 is integrated in the cover 60. The lamp adaptive cut-off device 10 and the driver 20 are independent of each other.

[0054] The driver 20 of this embodiment is provided with a rectifier filter circuit 210 and a constant current and constant voltage circuit 220. The rectifier filter circuit 210 is electrically connected to the lamp adaptive cut-off device 10 and the constant current and constant voltage circuit 220 respectively. The constant current and constant voltage circuit 220 is electrically connected to the light-emitting module 40. Figure 6 shown.

[0055] It should be noted that the rectifier filter circuit 210 and the constant current and constant voltage circuit 220 in this embodiment are common lamp drive circuits, which are common knowledge for those skilled in the art, and the specific circuits of the rectifier filter circuit 210 and the constant current and constant voltage circuit 220 are not the invention focus of the utility model, so they will not be described one by one here. The housing 50 of the utility model is grounded. The wiring terminal 30 of the utility model is used to connect an alternating current power supply, that is, input AC. The input end and output end of the driver 20 of the utility model are the AC input end and the DC output end.

[0056] When the control switch of the lamp is turned off, the AC circuit of the lamp is completely disconnected physically, that is, the power grid is completely cut off, that is, when the lamp is turned off, no leakage current can be generated, and the dimming phenomenon will no longer occur. At the same time, the power grid is completely cut off after the external control switch is turned off, and there will be no safety hazards even if the control switch is connected incorrectly or a single switch is used for double live line voltage.

[0057] Example 4

[0058] A lamp, such as Figure 8 As shown, other features are the same as those of Embodiment 3, except that the lamp adaptive cut-off device 10 of this embodiment is assembled inside the driver 20 .

[0059] Compared with the third embodiment, the lamp adaptive cut-off device 10 of the present embodiment is directly integrated into the driver 20, thereby reducing the difficulty of wiring during use.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the protection scope of the utility model. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A lamp adaptive cut-off device, characterized in that: A servo circuit and a double-pole relay are provided, wherein the servo circuit is electrically connected to the coil of the double-pole relay, two groups of contacts of the double-pole relay are respectively located correspondingly to the external neutral line and the external live line, and the servo circuit is respectively connected to the external neutral line and the external live line.

2. The lamp adaptive cut-off device according to claim 1, characterized in that: The servo circuit is a linear regulator step-down circuit, a switching power supply or a capacitor step-down type voltage regulator circuit.

3. The lamp adaptive cut-off device according to claim 1, characterized in that: The servo circuit is a capacitor step-down voltage stabilization circuit.

4. The lamp adaptive cut-off device according to claim 3, characterized in that: The capacitor step-down voltage stabilizing circuit is provided with a resistor R1, a capacitor C1, a rectifier bridge D1, a coupling capacitor C2, a resistor R2, a resistor R3, a voltage stabilizing diode D2 and a diode D3. The double-pole relay is defined as a relay K1. The connection end A of the rectifier bridge D1 is connected in series with the resistor R1 and the external live wire. The connection end A of the rectifier bridge D1 is also connected in series with the capacitor C1 and the external live wire. The connection end B of the rectifier bridge D1 is connected to the external neutral wire. The connection end D of the rectifier bridge D1 is connected to the positive electrode of the coupling capacitor C2. The negative electrode of the coupling capacitor C2 is connected to the connection end B of the rectifier bridge D1, the connection end D of the rectifier bridge D1 is also connected in series with a resistor R2 and connected to the connection end B, the connection end D of the rectifier bridge D1 is also connected in series with a resistor R3 and connected to one end of the coil of the relay K1, one end of the coil of the relay K1 is also respectively connected to the negative electrode of the Zener diode D2 and the negative electrode of the diode D3, the other end of the coil of the relay K1, the positive electrode of the Zener diode D2 and the positive electrode of the diode D3 are respectively connected to the connection end B of the rectifier bridge D1.

5. The lamp adaptive cut-off device according to claim 4, characterized in that: The resistor R1 is the discharge resistor of the capacitor C1; The resistor R3 is a blocking resistor; The diode D3 is a reverse discharge diode of the coil of the relay K1.

6. The lamp adaptive cut-off device according to claim 4, characterized in that: The output voltage of relay K1 is DC5~36V, capacitor C1 is a film capacitor with a withstand voltage greater than 400V, the resistance value of resistor R1 is 100 kiloohms~1 megohms, the withstand voltage range of rectifier bridge D1 is 600V~1000V and the voltage is greater than 0.5A, coupling capacitor C2 is an electrolytic capacitor or a chip resistor with a capacity of 1 microfarad~470 microfarads, the resistance value of resistor R2 is 1 kiloohm~1 megohm, the resistance value of resistor R3 is 0 ohm~1 kiloohm, the voltage stabilization value of voltage regulator diode D2 is 5V~40V, and the reverse withstand voltage of diode D3 is greater than 50V.

7. A lamp, characterized in that: A lamp adaptive cut-off device, a wiring terminal, a driver and a light-emitting module as described in any one of claims 1 to 6 are provided, the wiring terminal is electrically connected to the lamp adaptive cut-off device, the input end of the driver is electrically connected to the lamp adaptive cut-off device, and the output end of the driver is electrically connected to the light-emitting module.

8. The lamp according to claim 7, characterized in that: The lamp adaptive cut-off device and the driver are independent of each other; or The lamp adaptive cutting device is assembled inside the driver.

9. The lamp according to claim 8, characterized in that: A shell and a cover are also provided, the shell and the cover are buckled with each other, the lamp adaptive cutting device, the connection terminal and the driver are all assembled in the shell, and the light-emitting module is integrated in the cover.

10. The lamp according to claim 9, characterized in that: The driver is provided with a rectifier and filter circuit and a constant current and constant voltage circuit. The rectifier and filter circuit are electrically connected to the lamp adaptive cut-off device and the constant current and constant voltage circuit respectively. The constant current and constant voltage circuit is electrically connected to the light-emitting module.

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