Underwater pressure-resistant searchlight

Abstract

The utility model provides an underwater pressure-resistant searchlight, which relates to the technical field of lamps, and ensures the safety and reliability of electrical connection by adopting the straight cylindrical design of a shell, separating a light source cavity from a power supply cavity and utilizing a light source supporting plate to separate the two cavities. The lens is tightly matched with the front cover to seal the light source cavity, so that water is effectively prevented from entering, and the waterproof performance is enhanced. And the rear cover seals the power supply cavity and is provided with a watertight joint, so that the overall waterproof and sealing performance is further improved. The light source and the driving power supply are connected through a small hole in the middle of the light source supporting plate in a threading mode, the assembling process is simplified, and the stability of electrical connection is ensured. Besides, the design of the U-shaped rear cover is adopted, two sealing components are arranged, and a thread fixing mode is adopted, so that the sealing performance of the lamp is enhanced, the assembly process is simplified, and the waterproof capability of the lamp in the underwater environment is ensured.

Description

Technical Field

[0001] This utility model relates to the field of lighting technology, and in particular to an underwater pressure-resistant searchlight. Background Technology

[0002] The underwater environment is extremely harsh, placing extremely high demands on underwater lighting equipment. Traditional underwater lights, due to design and material limitations, struggle to meet the waterproofing requirements of underwater operations. Traditional lights often employ simple sealing methods, making them susceptible to water leakage under high pressure, leading to short circuits and damage. Furthermore, the light sources and drivers of traditional lights are easily damaged by temperature changes and vibrations, and their low luminous efficiency and high energy consumption result in poor stability when used in underwater environments. Summary of the Invention

[0003] The purpose of this invention is to provide an underwater pressure-resistant searchlight to solve one or more technical problems existing in the prior art, or at least provide a beneficial option or create conditions.

[0004] The solution to the technical problem of this utility model is as follows: This utility model provides an underwater pressure-resistant searchlight, including a housing, a lens, a front cover, a rear cover, a light source, and a driving power supply. The housing is cylindrical. The housing includes a light source cavity and a power supply cavity. A light source support plate is provided between the light source cavity and the power supply cavity.

[0005] The light source is disposed in the light source cavity, the lens is disposed opposite to the light emitting surface of the light source, the front cover is connected to the housing and abuts against the lens so that the lens seals the light source cavity; the end face of the housing that contacts the lens is provided with a first groove; a first sealing member is disposed in the first groove;

[0006] The driving power supply is disposed in the power supply cavity, and the rear cover closes the power supply cavity; a watertight connector is provided on the rear cover, and the watertight connector is connected to the driving power supply; the light source and the driving power supply are connected by a wire through a small hole in the middle of the light source support plate; the driving power supply is used to provide power to the light source.

[0007] The rear cover is U-shaped and matches the housing. The housing has a second groove and a third groove. A second sealing member is placed in the second groove, and a third sealing member is placed in the third groove. Both the second sealing member and the third sealing member abut against the inner wall surface of the housing.

[0008] The rear cover is also provided with internal threads, which cooperate with the external threads on the housing. The rear cover is fixed to the housing by tightening the threads.

[0009] Furthermore, the driving power supply includes: a fuse, a rectifier bridge, a first filter capacitor, a second filter capacitor, a constant current driving chip, a pulse width modulation module, a first temperature control switch, a second temperature control switch, a negative temperature coefficient thermistor, a varistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a sixth resistor.

[0010] The light source includes a first set of LED beads, a second set of LED beads, and a third set of LED beads; the constant current driver chip is model SM15103E;

[0011] The first end of the fuse is connected to the external live wire, and the second end of the fuse is connected to the input terminal of the rectifier bridge through the negative temperature coefficient thermistor and the varistor.

[0012] The positive output terminal of the rectifier bridge is connected to the positive terminal of the first filter capacitor. The first filter capacitor and the second filter capacitor are connected in parallel. The first terminal of the first resistor is connected to the positive output terminal of the rectifier bridge, and the second terminal of the first resistor is connected to the VDD terminal of the constant current driver chip. The DIM terminal of the constant current driver chip is connected to the pulse width modulation module through the second resistor.

[0013] The negative output terminal of the rectifier bridge, the negative terminal of the first filter capacitor, the negative terminal of the second filter capacitor, and the GND terminal of the constant current driver chip are all grounded; the REXT terminal of the constant current driver chip is grounded through the third resistor.

[0014] The OUT1 terminal of the constant current drive chip is connected to the first terminal of the first temperature control switch through the fourth resistor, and the second terminal of the first temperature control switch is connected to the cathode of the first group of LED beads; the OUT2 terminal of the constant current drive chip is connected to the first terminal of the second temperature control switch through the fifth resistor, and the second terminal of the second temperature control switch is connected to the cathode of the second group of LED beads; the OUT3 terminal of the constant current drive chip is connected to the cathode of the third group of LED beads through the sixth resistor.

[0015] The anode terminals of the first group of LED beads, the second group of LED beads, and the third group of LED beads are all grounded.

[0016] Furthermore, the first sealing member, the second sealing member, and the third sealing member are all O-rings.

[0017] Furthermore, the light source support plate is fixed inside the housing by screws, and the light source is fixed to the light source support plate by screws.

[0018] Furthermore, the watertight connector is fixed to the rear cover by threads.

[0019] Furthermore, the power supply cavity is provided with potting compound to seal the drive power supply.

[0020] Furthermore, the light source is an LED light source.

[0021] Furthermore, the lens is a glass component.

[0022] Furthermore, the housing, the rear cover, and the front cover are all alloy metal components.

[0023] Furthermore, the surfaces of the housing, the rear cover, and the front cover are coated with a layer of anti-corrosion material.

[0024] The beneficial effects of this utility model are as follows: This utility model provides an underwater pressure-resistant searchlight. By adopting a cylindrical shell design and separating the light source cavity and power supply cavity, and using a light source support plate to separate the two cavities, the safety and reliability of the electrical connection are ensured. The lens fits tightly with the front cover, sealing the light source cavity and effectively preventing water ingress, thus enhancing waterproof performance. The rear cover seals the power supply cavity and is equipped with a watertight connector, further improving the overall waterproof and sealing performance. The light source and the driving power supply are connected by wires through a small hole in the middle of the light source support plate, simplifying the assembly process and ensuring the stability of the electrical connection. In addition, this utility model adopts a "U"-shaped rear cover design, which enhances the sealing performance of the lamp by setting two sealing components and using threaded fixing, simplifies the assembly process, and ensures the waterproof capability of the lamp in underwater environments. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of the present invention, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0026] Figure 1 This is a structural schematic diagram of an underwater pressure-resistant searchlight;

[0027] Figure 2 This is an exploded view of the underwater pressure-resistant searchlight;

[0028] Figure 3 This is the circuit diagram of the driving power supply for an underwater pressure-resistant searchlight. Detailed Implementation

[0029] The following will clearly and completely describe the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connections / linkages mentioned herein do not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this invention can be combined interactively without contradicting each other.

[0030] refer to Figure 1 , Figure 2 and Figure 3 The underwater pressure-resistant searchlight provided by this utility model includes a housing 100, a lens 102, a front cover 101, a rear cover 202, a light source 103, and a driving power supply 201; the housing 100 is cylindrical; the housing 100 includes a light source cavity and a power supply cavity; a light source support plate 104 is provided between the light source cavity and the power supply cavity.

[0031] The underwater pressure-resistant searchlight provided by this utility model adopts a cylindrical housing 100 design, which not only reduces the weight of the searchlight, but also ensures the safety and stability of the internal electronic components of the searchlight by separating independent light source chambers and power supply chambers inside the housing 100. The setting of the light source support plate 104 not only realizes the electrical connection between the light source 103 and the driving power supply 201, but also strengthens the overall sealing performance of the searchlight through its structural design, ensuring that it can maintain good waterproof performance in the high-pressure underwater environment.

[0032] The light source 103 is disposed in the light source cavity, and the lens 102 is disposed opposite to the light emitting surface of the light source 103. The front cover 101 is connected to the housing 100 and abuts against the lens 102 so that the lens 102 seals the light source cavity. The end face of the housing 100 that contacts the lens 102 is provided with a first groove. A first sealing member is disposed in the first groove.

[0033] Lens 102 transmits light emitted from light source 103, ensuring that the light can pass smoothly and illuminate the target area. The high light transmittance of lens 102 effectively reduces light loss and improves the illumination efficiency of the searchlight. Lens 102 covers the front of light source 103, providing physical protection, extending the lifespan of light source 103, and ensuring the long-term stable operation of the searchlight. Lens 102 can be designed in various ways (such as flat, convex, or concave) to adjust the light distribution, achieve specific lighting effects, optimize light distribution, improve the uniformity and directionality of illumination, and meet the needs of different application scenarios. Lens 102 fits tightly with front cover 101. The end face of housing 100 that contacts lens 102 has a first groove, within which a first sealing member is installed, forming a closed light source cavity. This ensures the waterproof performance of the light source cavity, prevents water ingress, protects internal electronic components from damage, and improves the reliability of the searchlight in high-pressure underwater environments.

[0034] The driving power supply 201 is located in the power supply cavity, and the rear cover 202 seals the power supply cavity. A watertight connector 203 is provided on the rear cover 202, and the watertight connector 203 is connected to the driving power supply 201. The light source 103 and the driving power supply 201 are connected by a wire through a small hole in the middle of the light source support plate 104. The driving power supply 201 is used to provide power to the light source 103.

[0035] The driver power supply 201 is housed within the power supply cavity to provide a stable current to the light source 103, improving lighting performance and extending the lifespan of the light source 103. The rear cover 202 seals the power supply cavity, preventing moisture and other substances from the external environment from entering, ensuring the normal operation of electronic components, and improving the reliability and lifespan of the searchlight. A watertight connector 203 is provided on the rear cover 202 for connecting an external power cord, ensuring the connection point of the power cord has good waterproof performance, preventing moisture from entering the power supply cavity through the power cord, and further improving the searchlight's waterproof performance.

[0036] The watertight connector 203 is connected to the drive power supply 201 to ensure that the power cord can transmit power safely and reliably, guarantee the electrical connection stability of the power cord, prevent short circuits or open circuits caused by poor connection, and improve the electrical safety and reliability of the searchlight.

[0037] By sealing the power supply cavity and watertight connector 203 with the rear cover 202, the stable operation of the drive power supply 201 and other electronic components in the underwater high-pressure environment is ensured, improving the reliability and safety of the searchlight and ensuring the efficient, stable and reliable operation of the underwater pressure-resistant searchlight in extreme environments.

[0038] The light source support plate 104 physically isolates the light source cavity and the power supply cavity, and achieves necessary electrical connections through small holes. This prevents interference between electrical and optical components, ensuring that the light source 103 can obtain the required current from the drive power supply 201 for normal operation, thus improving the stability and safety of the searchlight. The design of the small holes not only ensures electrical connections while minimizing the risk of moisture ingress, but also reduces complex wiring and connecting components, making the searchlight design more compact and simple, and facilitating production and maintenance.

[0039] The rear cover 202 is U-shaped and matches the housing 100. The housing 100 has a second groove and a third groove. A second sealing member is placed in the second groove, and a third sealing member is placed in the third groove. Both the second and third sealing members abut against the inner wall surface of the housing 100. The rear cover 202 also has an internal thread that mates with the external thread on the housing 100. The rear cover 202 is fixed to the housing 100 by tightening the thread.

[0040] The rear cover 202 is designed in a "U" shape, fitting snugly with the housing 100 to ensure the searchlight's sealing and structural stability under high-pressure underwater conditions. The housing 100 has a second groove and a third groove. A second sealing member is placed in the second groove, and a third sealing member is placed in the third groove. Both the second and third sealing members abut against the inner wall of the housing 100, forming a double seal. This effectively enhances the searchlight's waterproof performance, prevents moisture from entering the power supply chamber, and ensures the safety of internal electronic components.

[0041] The rear cover 202 is also designed with internal threads that mate with the external threads on the housing 100, allowing the rear cover 202 to be securely fixed to the housing 100 by tightening the threads. This threaded connection not only provides reliable mechanical fixation but also makes the installation and removal of the rear cover 202 very convenient, facilitating the maintenance and repair of the searchlight. When it is necessary to open the rear cover 202 for battery replacement or circuit inspection, simply unscrew the rear cover 202 without the need for special tools, effectively improving the convenience of operation and work efficiency.

[0042] Furthermore, the "U"-shaped design of the rear cover 202 takes into account various complex situations that the searchlight may encounter during underwater operations. For example, in an underwater environment, due to pressure changes, the searchlight may be subjected to varying degrees of compression and stretching, and the "U"-shaped design can provide a certain buffer space, reducing the impact of external pressure on the internal structure of the searchlight. At the same time, this design also helps to disperse the contact stress between the rear cover 202 and the housing 100, further improving the overall durability and reliability of the searchlight.

[0043] In a further embodiment of this utility model, the housing 100, the rear cover 202, and the front cover 101 are all alloy metal components.

[0044] The housing 100, rear cover 202, and front cover 101 are all made of alloy metal materials, ensuring the searchlight's high strength and corrosion resistance in underwater high-pressure environments. Alloy metal materials possess excellent mechanical properties, enabling them to withstand underwater high pressure and impacts, thus guaranteeing the searchlight's structural stability and long-term reliability.

[0045] Preferably, the housing 100 is machined from a hollow alloy metal cylinder. Traditional underwater searchlights use solid materials and CNC machining to form the pressure-resistant body of the lamp housing, which is not only wasteful of materials but also costly. Using a hollow alloy metal cylinder for the housing 100 reduces the complexity and time of CNC machining, lowers manufacturing costs, and also helps improve the overall portability and ease of installation of the lamp.

[0046] In a further embodiment of the present invention, the surfaces of the housing 100, the rear cover 202, and the front cover 101 are coated with an anti-corrosion material layer.

[0047] The surfaces of the housing 100, rear cover 202, and front cover 101 are coated with an anti-corrosion material layer, further enhancing the searchlight's corrosion resistance, preventing moisture from corroding the metal surface, and extending the searchlight's service life. This design not only improves the searchlight's pressure resistance and corrosion resistance in underwater environments but also ensures its aesthetics and durability, enabling it to operate stably for extended periods under extreme conditions.

[0048] In a further embodiment of this utility model, the driving power supply 201 includes: a fuse F1, a rectifier bridge BD1, a first filter capacitor C1, a second filter capacitor C2, a constant current driving chip U1, a pulse width modulation module PWM, a first temperature control switch S1, a second temperature control switch S2, a negative temperature coefficient thermistor RT1, a varistor RV1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6;

[0049] The light source 103 includes a first group of LED beads string LED1, a second group of LED beads string LED2, and a third group of LED beads string LED3; the constant current drive chip U1 is model SM15103E;

[0050] Fuse F1 is the first line of protection in the circuit. When the current in the circuit exceeds a predetermined value, fuse F1 will quickly melt and cut off the power supply to prevent overcurrent from damaging the circuit and the searchlight.

[0051] The rectifier bridge BD1 converts the input AC power to DC power, ensuring a stable DC power supply for the LED string. This step is necessary because the LED string can only operate under DC power, and the use of the rectifier bridge BD1 improves the stability and reliability of the circuit.

[0052] The first filter capacitor C1 and the second filter capacitor C2 are used to smooth the rectified DC voltage, reduce voltage fluctuations, and provide a more stable power supply. This helps eliminate noise and ripple in the circuit, ensures stable brightness of the LED string, and extends its lifespan.

[0053] The negative temperature coefficient thermistor RT1, varistor RV1, first resistor R1, second resistor R2, third resistor R3, fourth resistor R4, fifth resistor R5, and sixth resistor R6 play different roles in the circuit, such as current limiting, voltage division, and temperature compensation, ensuring the stability and safety of the circuit. The negative temperature coefficient thermistor RT1 is used for temperature compensation, the varistor RV1 is used for overvoltage protection, and the other resistors are used for voltage division and current limiting.

[0054] The constant current driver chip U1 provides a constant current output, ensuring that the LED string receives a stable current under different load and temperature conditions. This avoids brightness variations and shortened lifespan caused by current fluctuations, improving the reliability and energy efficiency of the LED string.

[0055] The pulse width modulation (PWM) module precisely controls the brightness of the LED string by adjusting the duty cycle of the output current. This allows users to adjust the brightness of the spotlight according to actual needs, meeting the lighting requirements of different application scenarios while improving energy efficiency.

[0056] The grouping design of the first group of LED beads (LED1), the second group of LED beads (LED2), and the third group of LED beads (LED3) not only improves the brightness of the searchlight but also increases the reliability of the system through redundancy. Even if one group of LED beads fails, the other groups can continue to work, ensuring continuous lighting.

[0057] The first temperature control switch S1 and the second temperature control switch S2 are used to monitor the internal temperature of the searchlight. When the temperature exceeds a preset threshold, the temperature control switch will automatically disconnect the corresponding LED string to reduce power output and prevent the searchlight from overheating and being damaged. When the temperature returns to normal, the temperature control switch will automatically reset, restoring the searchlight to normal operation and ensuring its long-term stable operation.

[0058] The first terminal of fuse F1 is connected to the external live wire L, and the second terminal of fuse F1 is connected to the input terminal of rectifier bridge BD1 through negative temperature coefficient thermistor RT1 and varistor RV1. This design ensures the safety and stability of the circuit in several ways. First, fuse F1, as the first line of defense, can quickly melt and cut off the power supply when the current in the circuit exceeds a predetermined value, preventing overcurrent from damaging subsequent circuits and the searchlight. Second, the negative temperature coefficient thermistor RT1 provides a high initial resistance when the circuit starts up, and the resistance gradually decreases as the temperature rises, playing a role in current limiting and temperature compensation, protecting the circuit from large current surges at startup. Varistor RV1 is used to absorb transient voltage spikes and surge voltages, preventing overvoltage damage to rectifier bridge BD1 and other sensitive electronic components. Through this combined design, not only is the circuit's anti-interference capability and reliability improved, but the lifespan of electronic components is also extended, ensuring the stable operation of the underwater pressure-resistant searchlight in high-pressure underwater environments.

[0059] The positive output terminal of rectifier bridge BD1 is connected to the positive terminal of the first filter capacitor C1. The first filter capacitor C1 and the second filter capacitor C2 are connected in parallel. The first terminal of the first resistor R1 is connected to the positive output terminal of rectifier bridge BD1, and the second terminal of the first resistor R1 is connected to the VDD terminal of constant current driver chip U1.

[0060] First, the rectifier bridge BD1 converts AC to DC. The output DC voltage undergoes initial filtering by the first filter capacitor C1 to remove high-frequency ripple and noise, providing a smoother DC voltage. The first filter capacitor C1 and the second filter capacitor C2 are connected in parallel to further enhance the filtering effect, ensuring the purity and stability of the output voltage and reducing the impact of voltage fluctuations on subsequent circuits.

[0061] Secondly, the first resistor R1 is connected between the positive output terminal of the rectifier bridge BD1 and the VDD terminal of the constant current driver chip U1, serving to limit current and regulate voltage. This not only protects the constant current driver chip from damage caused by excessive input voltage, but also ensures that the chip receives a stable power supply, improving the reliability and stability of the circuit.

[0062] Overall, through multi-stage filtering and current limiting measures, high-quality power output is ensured, providing stable power support for LED bead strings and circuits, extending the lifespan of electronic components, and ensuring the efficient and stable operation of the underwater pressure-resistant searchlight in the underwater environment.

[0063] The DIM terminal of the constant current drive chip U1 is connected to the pulse width modulation module PWM through the second resistor R2.

[0064] First, the Pulse Width Modulation (PWM) module precisely controls the brightness of the LED string by adjusting the duty cycle of the output current. When the duty cycle of the PWM signal changes, the constant current driver chip U1 adjusts the output current according to this signal, thereby changing the brightness of the LED string. This dimming method not only meets the lighting needs of different application scenarios but also reduces power consumption and extends battery life when full brightness is not required.

[0065] Secondly, the second resistor R2 serves as a current limiter and protector between the DIM terminal and the pulse width modulation (PWM) module. It ensures that the current received by the DIM terminal remains within a safe range, preventing excessive current from damaging the constant current driver chip U1. Furthermore, the second resistor R2 can filter out high-frequency noise in the pulse width modulation signal, improving signal purity and ensuring the stability and reliability of dimming.

[0066] Overall, the dimming and current limiting protection of the pulse width modulation module (PWM) not only improves the energy efficiency and flexibility of the searchlight, but also enhances the stability and reliability of the circuit, ensuring the efficient operation of the underwater pressure-resistant searchlight in various complex environments.

[0067] The negative output terminal of rectifier bridge BD1, the negative terminal of the first filter capacitor C1, the negative terminal of the second filter capacitor C2, and the GND terminal of constant current driver chip U1 are all grounded; the REXT terminal of constant current driver chip U1 is grounded through the third resistor R3.

[0068] First, the negative output terminal of the rectifier bridge BD1, the negative terminal of the filter capacitor, and the GND terminal of the constant current driver chip are all grounded together, forming a common ground reference point. This not only ensures that all components in the circuit have a unified reference potential, but also reduces the potential difference between ground lines, avoids interference and noise caused by potential differences, and improves the stability and anti-interference capability of the circuit.

[0069] Secondly, the REXT terminal of the constant current driver chip U1 is grounded through the third resistor R3. This design is used to set the output current of the constant current driver chip. The external resistance value of the REXT terminal determines the constant current output value of the chip. By adjusting the resistance value of the third resistor R3, the driving current of the LED string can be precisely controlled, ensuring that the LED string can obtain a stable current supply under different operating conditions, and avoiding brightness changes and shortened lifespan caused by current fluctuations.

[0070] Overall, this grounding and resistance configuration design not only improves the stability and reliability of the circuit, but also ensures constant current drive and precise dimming of the LED string, extends the lifespan of electronic components, and ensures the efficient and stable operation of the underwater pressure-resistant searchlight in the underwater environment.

[0071] The OUT1 terminal of the constant current drive chip U1 is connected to the first terminal of the first temperature control switch S1 through the fourth resistor R4, and the second terminal of the first temperature control switch S1 is connected to the cathode terminal of the first LED string LED1; the OUT2 terminal of the constant current drive chip U1 is connected to the first terminal of the second temperature control switch S2 through the fifth resistor R5, and the second terminal of the second temperature control switch S2 is connected to the cathode terminal of the second LED string LED2; the OUT3 terminal of the constant current drive chip U1 is connected to the cathode terminal of the third LED string LED3 through the sixth resistor R6.

[0072] First, through resistors R4, R5, and R6, a current-limiting protection is formed between the output of the constant current driver chip U1 and the temperature control switch and LED string, preventing excessive current from damaging the LED string and temperature control switch. These resistors also act as voltage dividers, ensuring that each LED string receives an appropriate drive current, improving the brightness consistency and lifespan of the LED string.

[0073] Secondly, the first temperature control switch S1 and the second temperature control switch S2 are used to monitor the internal temperature of the searchlight. When the temperature exceeds a preset threshold, the first temperature control switch S1 and the second temperature control switch S2 will automatically disconnect the corresponding LED string to reduce power output and prevent the searchlight from overheating and being damaged. When the temperature returns to normal, the temperature control switches will automatically reset, restoring the searchlight to normal operation. This overheat protection mechanism significantly improves the reliability and safety of the searchlight in high-pressure underwater environments, ensuring its long-term stable operation.

[0074] The anode terminals of LED1 in the first LED string, LED2 in the second LED string, and LED3 in the third LED string are all grounded. Grounding the anode terminals of each LED string not only improves the stability and safety of the circuit but also simplifies wiring and installation, ensuring the efficient and reliable operation of the underwater pressure-resistant searchlight in underwater environments.

[0075] Preferably, the first group of LED beads string LED1, the second group of LED beads string LED2, and the third group of LED beads string LED3 are all soldered onto the same substrate in a surface mount package form to form the light source 103; the first temperature control switch S1 and the second temperature control switch S2 are also soldered onto the same substrate in a surface mount package form, and the substrate is installed inside the light source cavity.

[0076] Preferably, the substrate is an aluminum substrate.

[0077] During operation, the heat generated by each string of LEDs is first transferred to the aluminum substrate, then conducted through an efficient heat conduction path to the metal casing of the lamp, and finally dissipated into the water. The first temperature control switch S1 and the second temperature control switch S2 continuously monitor the temperature of the aluminum substrate in real time to ensure the stability and safety of the light source system.

[0078] During normal operation, the first temperature control switch S1 and the second temperature control switch S2 are closed, and the three constant current ports of the constant current driver chip U1 output current normally, causing all LED strings to light up. When the first temperature control switch S1 and the second temperature control switch S2 sense that the temperature exceeds the preset threshold, they open, interrupting the current output of the OUT1 and OUT2 ports of the constant current driver chip U1. LED1 in the first group of LED strings and LED2 in the second group of LED strings turn off, with only the OUT3 port continuing to output current. LED3 in the third group of LED strings lights up normally, achieving low-power output. When the temperature returns to a safe range, the first temperature control switch S1 and the second temperature control switch S2 automatically reset, and all LED strings resume normal operation.

[0079] Therefore, searchlights have good heat dissipation when used underwater, and their temperature generally does not get too high. However, if the searchlight leaves the water environment or malfunctions, the temperature may rise rapidly, causing damage. The over-temperature protection function, through the cooperation of the first temperature control switch S1 and the second temperature control switch S2, promptly cuts off the current to part of the LED bead string, reducing the total power of the searchlight and preventing damage from high temperatures. When the temperature returns to a safe range, the first and second temperature control switches S1 and S2 automatically reset, and the searchlight resumes normal operation. This design not only improves the reliability and safety of the searchlight but also simplifies the maintenance process, ensuring the long-term stable operation of the underwater searchlight.

[0080] In summary, underwater searchlights are primarily designed for underwater environments and possess excellent waterproof performance. However, when the searchlight is used on the surface, heat dissipation conditions deteriorate significantly, and the temperature can rise rapidly, potentially causing overheating and damage. Therefore, the searchlight incorporates an over-temperature protection function. This invention, through the coordinated design of the first temperature control switch S1 and the second temperature control switch S2, ensures that the user operates the searchlight only underwater, avoiding prolonged operation on the surface and thus extending its lifespan.

[0081] In a further embodiment of this utility model, the first sealing member, the second sealing member, and the third sealing member are all O-rings.

[0082] The first, second, and third sealing components are all O-rings, ensuring the airtightness of the power supply cavity and the light source cavity. This effectively prevents moisture and external impurities from entering, protecting the internal electrical and optical components and extending the searchlight's lifespan. The elastic properties of the O-rings also absorb external impacts and vibrations, improving the searchlight's impact resistance and stability. This design not only improves the searchlight's waterproof performance and reliability in high-pressure underwater environments but also ensures the cleanliness of the light source and power supply cavities, maintaining the light output and illumination efficiency of the light source 103, while protecting the safety and reliability of the electrical components within the power supply cavity. The uniform pressure distribution of the O-rings further enhances the sealing effect, preventing seal failure caused by uneven local pressure and ensuring the long-term stable operation of the searchlight.

[0083] In a further embodiment of the present invention, the light source support plate 104 is fixed inside the housing 100 by screws, and the light source 103 is fixed on the light source support plate 104 by screws.

[0084] The light source support plate 104 is fixed inside the housing 100 with screws, and the light source 103 is fixed to the light source support plate 104 with screws. The screw fixation of the light source support plate 104 to the housing 100 ensures a secure and reliable electrical connection between the light source 103 and the power supply cavity, avoiding the risk of loosening or detachment in harsh environments. The screw fixation of the light source 103 to the light source support plate 104 facilitates installation and replacement, simplifying the maintenance process. Overall, this design optimizes the performance of the underwater pressure-resistant searchlight, improving its reliability and practicality in underwater operations.

[0085] In a further embodiment of this utility model, the watertight connector 203 is fixed to the rear cover 202 by threads.

[0086] The watertight connector 203 is secured to the rear cover 202 with threads, a design that ensures reliable sealing and stable electrical connections for the searchlight in underwater environments. This threaded fixing not only provides a robust mechanical connection but also allows the watertight connector 203 to maintain excellent sealing performance underwater, effectively preventing moisture intrusion into the power supply chamber and protecting internal electronic components from damage. Simultaneously, this fixing method facilitates installation and disassembly, simplifying maintenance and repair processes and improving operational convenience. Furthermore, the tightness and reliability of the threaded connection enhance the overall structural integrity of the searchlight, ensuring it maintains high performance and a long lifespan even during extended use.

[0087] In a further embodiment of this utility model, the power supply cavity is provided with potting compound to seal the drive power supply 201.

[0088] The power supply cavity is sealed with potting compound to encapsulate the drive power supply 201. This design significantly improves the performance and reliability of the underwater pressure-resistant searchlight in several ways. First, the potting compound completely fills the gaps within the power supply cavity, forming a sealed whole that effectively prevents the intrusion of moisture and corrosive substances, protecting the internal electronic components from damage and ensuring long-term stable operation in high-pressure underwater environments. Second, the potting compound has excellent thermal conductivity, improving the power supply's heat dissipation, reducing heat buildup, and extending the lifespan of electronic components. Furthermore, the potting compound enhances the mechanical strength of the power supply cavity, reducing the impact of external shocks and vibrations on the internal circuitry and improving the overall structural stability. In summary, this design not only improves the searchlight's waterproof, moisture-proof, and corrosion-resistant capabilities but also enhances its reliability and durability in extreme environments, ensuring high-efficiency performance in underwater operations.

[0089] In a further embodiment of this utility model, the light source 103 is an LED light source.

[0090] The light source 103 utilizes an LED light source, a design that significantly enhances the performance and practicality of the underwater pressure-resistant searchlight in several ways. Firstly, LED light sources are highly energy efficient, providing high-brightness illumination with low energy consumption, extending battery life, and reducing energy consumption. Secondly, LED light sources have a long lifespan, typically reaching tens of thousands of hours, reducing the need for frequent replacements of the light source 103, thus lowering maintenance costs and workload. Furthermore, the small size and light weight of LED light sources help reduce the overall size and weight of the searchlight, improving portability and ease of operation. LED light sources also possess excellent shock resistance and impact resistance, maintaining stable operation in high-pressure and highly corrosive underwater environments. Finally, LED light sources have a fast start-up speed, reaching maximum brightness almost instantly, adapting to rapidly changing lighting needs. Overall, the use of LED light sources not only improves the energy efficiency and reliability of the searchlight but also enhances its practicality and durability in underwater operations.

[0091] In a further embodiment of this utility model, the lens 102 is a glass component.

[0092] First, the lens 102 should be made of a material with high pressure resistance, such as reinforced special glass, to ensure effective protection of the light source 103 under high-pressure underwater conditions, preventing damage to the light source 103 from external pressure and thus extending the searchlight's service life. Second, the lens 102 should preferably be made of transparent material to maximize light output, ensuring light transmittance and illumination efficiency to meet the high illumination requirements of underwater operations. Furthermore, the lens 102 can also use coating technology to change the color of the light, achieving specific lighting effects for different application scenarios and improving the searchlight's versatility and adaptability. Through these designs, the lens 102 not only enhances the searchlight's optical and protective performance but also ensures its reliability and safety in high-pressure underwater environments.

[0093] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. An underwater pressure-resistant searchlight, characterized in that, The device includes a housing, a lens, a front cover, a rear cover, a light source, and a driving power supply. The housing is cylindrical. The housing includes a light source cavity and a power supply cavity. A light source support plate is disposed between the light source cavity and the power supply cavity. The light source is disposed in the light source cavity, the lens is disposed opposite to the light emitting surface of the light source, the front cover is connected to the housing and abuts against the lens so that the lens seals the light source cavity; the end face of the housing that contacts the lens is provided with a first groove; a first sealing member is disposed in the first groove; The driving power supply is disposed in the power supply cavity, and the rear cover closes the power supply cavity; a watertight connector is provided on the rear cover, and the watertight connector is connected to the driving power supply; the light source and the driving power supply are connected by a wire through a small hole in the middle of the light source support plate; the driving power supply is used to provide power to the light source. The rear cover is U-shaped and matches the housing. The housing has a second groove and a third groove. A second sealing member is placed in the second groove, and a third sealing member is placed in the third groove. Both the second sealing member and the third sealing member abut against the inner wall surface of the housing. The rear cover is also provided with internal threads, which cooperate with the external threads on the housing. The rear cover is fixed to the housing by tightening the threads.

2. The underwater pressure-resistant searchlight as described in claim 1, characterized in that, The driving power supply includes: a fuse, a rectifier bridge, a first filter capacitor, a second filter capacitor, a constant current driving chip, a pulse width modulation module, a first temperature control switch, a second temperature control switch, a negative temperature coefficient thermistor, a varistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a sixth resistor. The light source includes a first set of LED beads, a second set of LED beads, and a third set of LED beads; the constant current driver chip is model SM15103E; The first end of the fuse is connected to the external live wire, and the second end of the fuse is connected to the input terminal of the rectifier bridge through the negative temperature coefficient thermistor and the varistor. The positive output terminal of the rectifier bridge is connected to the positive terminal of the first filter capacitor. The first filter capacitor and the second filter capacitor are connected in parallel. The first terminal of the first resistor is connected to the positive output terminal of the rectifier bridge, and the second terminal of the first resistor is connected to the VDD terminal of the constant current driver chip. The DIM terminal of the constant current driver chip is connected to the pulse width modulation module through the second resistor. The negative output terminal of the rectifier bridge, the negative terminal of the first filter capacitor, the negative terminal of the second filter capacitor, and the GND terminal of the constant current driver chip are all grounded; the REXT terminal of the constant current driver chip is grounded through the third resistor. The OUT1 terminal of the constant current drive chip is connected to the first terminal of the first temperature control switch through the fourth resistor, and the second terminal of the first temperature control switch is connected to the cathode of the first group of LED beads; the OUT2 terminal of the constant current drive chip is connected to the first terminal of the second temperature control switch through the fifth resistor, and the second terminal of the second temperature control switch is connected to the cathode of the second group of LED beads; the OUT3 terminal of the constant current drive chip is connected to the cathode of the third group of LED beads through the sixth resistor. The anode terminals of the first group of LED beads, the second group of LED beads, and the third group of LED beads are all grounded.

3. The underwater pressure-resistant searchlight as described in claim 1, characterized in that, The first sealing member, the second sealing member, and the third sealing member are all O-rings.

4. The underwater pressure-resistant searchlight as described in claim 1, characterized in that, The light source support plate is fixed inside the housing with screws, and the light source is fixed to the light source support plate with screws.

5. The underwater pressure-resistant searchlight as described in claim 1, characterized in that, The watertight connector is fixed to the rear cover by threads.

6. The underwater pressure-resistant searchlight as described in claim 1, characterized in that, The power supply cavity is filled with potting compound to seal the drive power supply.

7. The underwater pressure-resistant searchlight as described in claim 1, characterized in that, The light source is an LED light source.

8. The underwater pressure-resistant searchlight as described in claim 1, characterized in that, The lens is a glass component.

9. The underwater pressure-resistant searchlight as described in claim 1, characterized in that, The housing, the rear cover, and the front cover are all made of alloy metal materials.

10. The underwater pressure-resistant searchlight as described in claim 1, characterized in that, The surfaces of the housing, the rear cover, and the front cover are coated with a layer of anti-corrosion material.

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