Novel safety lighting fixture
By incorporating anti-electric shock circuits and detection circuits within the lighting fixtures, and utilizing a microwave detection module to automatically shut off the power and trigger a buzzer to indicate a fault, the risk of electric shock to users and the problem of fault detection are solved, thereby improving safety and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI AITE LIGHTING DESIGN CO LTD
- Filing Date
- 2024-10-23
- Publication Date
- 2026-06-16
AI Technical Summary
Existing lighting fixtures lack protective functions, posing a risk of electric shock to users, and the inability to detect faults without turning on the power switch affects normal use.
The lighting fixture is equipped with an anti-electric shock circuit and a detection circuit, including a microwave detection module and a relay. The microwave detection module automatically shuts off the power when a user approaches, and the detection circuit alerts the user to the fault via a buzzer.
It reduces the risk of electric shock to users during maintenance and can provide early warning of faults without turning on the power switch, ensuring reliable operation of lighting fixtures.
Smart Images
Figure CN224368019U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lighting equipment technology, and in particular to a new type of safety lighting fixture. Background Technology
[0002] With the advancement of lighting technology, the functions and styles of lighting fixtures have also developed. The authorized patent in my country, patent number "201720728455.4" and titled "Equipment Lighting Lamp," states that "this utility model has the advantages of simple structure and the ability to adjust color temperature and brightness."
[0003] As can be seen from the above, although the comparative patent achieves the technical effects described in its invention, it still has the following technical drawbacks due to structural limitations, similar to other lighting fixture technologies in this field. First, it lacks a protective function. When users or electricians forget to turn off the main power switch while repairing the fixture, there is a chance of accidental electric shock from touching conductive parts inside the fixture, posing a certain safety hazard. Second, it lacks a self-diagnostic function for lighting faults. That is, users can only determine if there is a fault by checking if the light is on after turning on the power switch. During the day, or in public areas where lights have not been turned on for a long time at night, users cannot immediately know if the lighting fixture is faulty, causing inconvenience to normal use (for example, if a public area needs lighting for an event one night, but the lights are damaged, and the damaged lights are not replaced beforehand, replacing them only when the event is about to take place will have a negative impact on the event). Finally, due to the low product differentiation among existing lighting fixture manufacturers, competition between different manufacturers is increasingly fierce. Therefore, it is necessary to provide a lighting fixture that can effectively prevent users from getting electric shocks while repairing the fixtures and can actively indicate faults. Utility Model Content
[0004] To overcome the shortcomings of existing lighting fixtures due to structural limitations, as described in the background art, this utility model provides a new type of safe lighting fixture based on the lighting fixture body. With the joint action of related mechanisms, it can actively shut off the main power supply when the user forgets to turn off the main power switch during maintenance, reducing the chance of electric shock. Furthermore, it can proactively remind the user to replace the lighting fixture in advance if it malfunctions without the user turning on the power switch. This brings convenience to the user and ensures the reliable operation of the lighting fixture.
[0005] The technical solution adopted by this utility model to solve its technical problem is:
[0006] A novel safety lighting fixture includes a lighting fixture body and a storage battery. Its distinguishing feature is that it further comprises an anti-electric shock circuit and a detection circuit. The anti-electric shock circuit includes a microwave detection module and a relay. The storage battery, the anti-electric shock circuit, and the detection circuit are installed within the lighting fixture body. The power input terminals of the detection circuit and the anti-electric shock circuit are electrically connected to the two poles of the AC power supply. The power input terminals of the detection circuit and the anti-electric shock circuit are electrically connected to the two poles of the storage battery. The power output terminal of the anti-electric shock circuit is electrically connected to the power input terminal of the lighting fixture body. The two signal terminals of the detection circuit and the two control terminals of the anti-electric shock circuit are electrically connected.
[0007] Furthermore, in the microwave detection module and the relay, the power output terminal of the microwave detection module and the power input terminals of the first relay are electrically connected respectively, and the two power input terminals of the second relay and the two control power input terminals of the first relay are electrically connected respectively.
[0008] Furthermore, the detection circuit includes an electrically connected relay, resistor, transistor, and buzzer. The first normally closed contact of the first relay is connected to one end of the first resistor, the positive power input terminal of the buzzer, and one end of the fourth resistor. One end of the second resistor, one end of the third resistor, and the base of the first transistor are connected. The other end of the third resistor is connected to the emitter of the first transistor, the emitter of the second transistor, and the second normally closed contact of the first relay. The collector of the second transistor is connected to the negative power input terminal of the buzzer. The collector of the first transistor, the base of the second transistor, and the other end of the fourth resistor are connected.
[0009] Compared with the prior art, the advantages of this utility model are: (1) Based on the lighting fixture body, the anti-electric shock circuit can actively turn off the main power supply of the lighting fixture when the user forgets to turn off the main power switch during maintenance, thus reducing the probability of electric shock (such as contact with the wiring terminal of the lighting fixture or the conductive part inside the lamp holder); (2) The detection circuit can actively prompt the user to replace the lighting fixture in advance by buzzer when the lighting fixture malfunctions without the user turning on the power switch, thereby bringing convenience to the user and ensuring that the lighting fixture can work reliably. Attached Figure Description
[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0012] Figure 2 This is the circuit diagram of this utility model. Detailed Implementation
[0013] Figure 1 ,2 As shown, the new type of safety lighting fixture includes a lighting fixture body 1, a storage battery G1, a power module Y1, and also has an anti-electric shock circuit 2 and a detection circuit 3; the anti-electric shock circuit includes a microwave detection module Y2 and relays J1 and J2, and the storage battery G1, power module Y1, anti-electric shock circuit 2, and detection circuit 3 are installed on a circuit board inside the lighting fixture body 1.
[0014] Figure 1 , 2 As shown, in the microwave detection module Y2 and relays J1 and J2, the power output terminals 3 and 2 of the microwave detection module Y2 are connected to the power input terminals of the first relay J1 via wires. Similarly, the two power input terminals of the second relay J2 are connected to the two control power input terminals of the first relay J1 via wires. The detection surface of the microwave detection module Y2 is located outside the lower rear part of the lampshade 101 of the lamp body. The detection circuit includes a relay J3 and resistors R1, R2, R3, and R4 connected via circuit board wiring, transistors Q1 and Q2, and a buzzer B. The first normally closed contact of the first relay J3 is connected to one end of the first resistor R1, the positive power input terminal of the buzzer B, and one end of the fourth resistor R4. One end of the second resistor R2 and one end of the third resistor R3 are connected to the base of the first transistor Q1. The other end of the third resistor R3 is connected to the emitter of the first transistor Q1, the emitter of the second transistor Q2, and the second normally closed contact of the first relay J3. The collector of the second transistor Q2 is connected to the negative power input terminal of the buzzer B. The collector of the first transistor Q1, the base of the second transistor Q2, and the other end of the fourth resistor R4 are connected.
[0015] Figure 1 , 2 As shown, the power input terminals 1 and 2 of the power module Y1, the two power input terminals of the relay J3 in the detection circuit, and the two power input terminals of the relay J2 in the anti-electric shock circuit are connected to the two poles of the 220V AC power supply (i.e., the power output from the wall switch) via wires. The power output terminals 3 and 4 of the power module Y1 are connected to the two poles of the battery G1, the power input terminals of the anti-electric shock circuit, the microwave detection module Y2 (pins 1 and 2), and the two control power input terminals of the relay J3 in the detection circuit via wires. The two normally closed contacts of the relay J1 in the anti-electric shock circuit are connected to the two input terminals of the lighting lamp H1 in the lighting fixture body via wires (the power supply part of the lighting lamp H1 is installed in the lamp holder of the lighting lamp H1). The other end of the resistor R1 is connected to the control power input terminal of the relay J2 via wires. The normally closed contacts of the relay J2, the other end of the resistor R2, and the two normally closed contacts of the relay J1 are connected via wires. Figure 2As shown, power module Y1 is a finished product of AC 220V to DC 12V switching power supply module (standby current is only about 10mA); battery G1 is a 12V / 5Ah lithium battery; resistors R1, R2, R3, and R4 have resistance values of 10K, 10K, 1K, and 100k respectively; transistors Q1 and Q2 are NPN transistors of model 9013; relays J1, J2, and J3 are DC12V (standby current of J1, J2, and J3 is about 20mA); microwave detection module Y2 is a finished product of human body microwave radar induction switch of model TCZ3802 (standby current is only about 6mA, and the detection range in this example is adjusted to about 1 meter in a circle), which has two power input terminals and two power output terminals (the negative power output terminal and the negative power input terminal are shared); buzzer B is an active continuous sound buzzer alarm of model MF12. The components used in this new invention are all mature products, so their working principles will not be described in detail.
[0016] Figure 1 , 2 As shown, this new invention is based on the lighting fixture body 1. After the main power switch of the lighting fixture body 1 is turned on, relays J2 and J3 are energized and their control power input terminals and normally closed contacts are opened. 220V power enters the power input terminal of the lighting lamp H1 through the two control power input terminals and two normally closed contacts of relay J1, and the lighting lamp H1 (50W) is powered on normally to provide illumination. Because relays J2 and J3 are energized and their control power input terminals and normally closed contacts are opened, the 220V power will not enter the other end of resistor R1 or the emitter of transistor Q2. After the 220V AC power enters the power input terminal of the power module Y1, the power output terminal of the power module Y1 outputs a stable DC 12V power to the power input terminals of the battery G1 (normally the battery G1 is floating-charged, and the related circuits can still work normally after a power outage), the anti-electric shock circuit, and the detection circuit. When a user performs maintenance on the lamp body 1 without turning off the power switch, the user approaches the detection head range of the microwave detection module Y1 (approximately 1 meter). Power is output from pins 3 and 2 of the microwave detection module Y1 to the power input terminal of relay J1. Relay J1 is energized, opening its control power input terminal and normally closed contact. As a result, the lamp H1 in the lamp body 1 loses power and stops illuminating. This reduces the chance of electric shock when the user touches conductive parts inside the lamp holder during lamp replacement or maintenance. When the user finishes maintenance on the lamp body 1 and leaves the detection head range of the microwave detection module Y1, pins 3 and 2 of the microwave detection module Y1 stop outputting power, and the lamp body 1 resumes normal power supply.
[0017] Figure 1 , 2As shown, when the user does not use the lighting unit 1 during the day or turns off its power switch, relays J2 and J3 will be de-energized successively. Thus, the 220V terminals will not enter the power input terminals of the lighting unit H1. The positive terminal of the 12V power supply will enter one of the power input terminals of the lighting unit H1 via the first control power input terminal and the first normally closed contact of relay J3, resistor R1, the first control power input terminal and the first normally closed contact of relay J2, and then enter the other end of resistor R2 via the other power input terminal of the lighting unit H1 (forming a power circuit). When the lighting unit H1 (for example, if the filament is not broken, or if the primary winding of the transformer in the LED lighting unit is not open) does not have an open circuit fault, the 12V power supply will enter the base of transistor Q1 through the voltage divider of resistors R1, R2, and R3. Transistor Q1 will conduct, and its collector will output a low level, which will enter the base of transistor Q2. Transistor Q2 will not conduct. Therefore, buzzer B will not be energized and will not sound, indicating that the lighting unit H1 is normal and has no fault. When a lighting fixture H1 experiences an open-circuit fault (e.g., a broken filament or an open circuit in the primary winding of the LED lighting fixture's transformer), the 12V power supply no longer flows through resistors R1, R2, and R3 to the base of transistor Q1. Transistor Q1 is cut off, and its collector no longer outputs a low level to the base of transistor Q2. Transistor Q2's base receives a suitable forward bias voltage through resistor R4 for voltage reduction and current limiting, allowing it to conduct. Consequently, the collector of transistor Q2 outputs a low level to the negative power input of buzzer B, energizing and sounding the buzzer, indicating an open-circuit fault in lighting fixture H1. Through this, the new design can proactively shut off the main power supply to the lighting fixtures when the user forgets to turn off the main power switch during maintenance, reducing the chance of electric shock (e.g., from touching the lighting fixture's terminals or socket). Furthermore, it can proactively alert the user via buzzer when a lighting fixture malfunctions without the user turning on the power switch, thus providing convenience and ensuring reliable operation of the lighting fixtures. It should be noted that this application cannot be all-encompassing. The protection against electric shock mainly prevents users from touching the conductive parts inside the lamp holder or the lamp that are leaking electricity. The fault detection of the lamp mainly detects whether it is open circuit, but does not detect or indicate whether it is short circuit.
[0018] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.
[0019] Furthermore, it should be understood that although this specification describes the embodiments, the embodiments do not necessarily contain only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A novel safety lighting fixture, comprising a lighting fixture body and a storage battery, characterized in that, It also features an anti-electric shock circuit and a detection circuit; the anti-electric shock circuit includes a microwave detection module and a relay, and the battery, anti-electric shock circuit, and detection circuit are installed inside the lighting fixture body; the power input terminal of the detection circuit and the anti-electric shock circuit are electrically connected to the two poles of the AC power supply respectively; the power input terminal of the detection circuit and the anti-electric shock circuit are electrically connected to the two poles of the battery respectively; the power output terminal of the anti-electric shock circuit is electrically connected to the power input terminal of the lighting fixture body; the two signal terminals of the detection circuit and the two control terminals of the anti-electric shock circuit are electrically connected respectively.
2. The novel safety lighting fixture according to claim 1, characterized in that, In the microwave detection module and the relay, the power output terminal of the microwave detection module and the power input terminals of the first relay are electrically connected respectively, and the two power input terminals of the second relay and the two control power input terminals of the first relay are electrically connected respectively.
3. The novel safety lighting fixture according to claim 1, characterized in that, The detection circuit includes an electrically connected relay, resistor, transistor, and buzzer. The first normally closed contact of the first relay is connected to one end of the first resistor, the positive power input terminal of the buzzer, and one end of the fourth resistor. One end of the second resistor, one end of the third resistor, and the base of the first transistor are connected. The other end of the third resistor is connected to the emitter of the first transistor, the emitter of the second transistor, and the second normally closed contact of the first relay. The collector of the second transistor is connected to the negative power input terminal of the buzzer. The collector of the first transistor, the base of the second transistor, and the other end of the fourth resistor are connected.