Lighting lamp with adjustable light range

Abstract

The invention discloses a lighting lamp with an adjustable light range, and relates to the technical field of lighting lamps. The device comprises a driving motor, a reflecting plate, a light-emitting LED lamp, a reflecting light-gathering cover and the like. The light irradiation range is adjusted by rotating the reflecting plate, and conversion from concentrated illumination to annular scanning is achieved. The lamp is provided with an efficient heat dissipation system which comprises a temperature conduction lamp holder, heat dissipation fins and an intelligent control heat dissipation fan, and stable work of the LED lamp is guaranteed. The automatic reset mechanism enables the reflector to automatically recover to the initial position after stopping rotating, and operation is convenient and fast. The optimized air flow design improves the heat dissipation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of lighting fixtures, and in particular to a lighting fixture with an adjustable light range. Background Art

[0002] At present, most lighting fixtures on the market adopt a fixed illumination range design, that is, the angle and range of light cannot be adjusted after installation. This design can meet basic lighting needs in some fixed scenes, but it is very limited in applications where the illumination range needs to be flexibly adjusted. For example, in shopping malls, exhibition halls, stage performances and other places, different activities and display contents require different light distribution and brightness. However, traditional fixed lighting fixtures cannot adjust the illumination range in real time according to actual needs, resulting in unsatisfactory lighting effects, unable to highlight key points or create a specific atmosphere. In terms of heat dissipation, the heat dissipation method of traditional lamps mainly relies on passive heat dissipation, relying on natural convection and heat sink design to dissipate heat. However, with the development of LED technology, the power and brightness of lamps are constantly improving, and the heat generated is also increasing. Passive heat dissipation seems to be inadequate in high-power lamps, with low heat dissipation efficiency and inability to effectively reduce the internal temperature of the lamp. Long-term operation will cause LED chips to overheat, accelerate light attenuation, shorten service life, and even cause safety hazards. Summary of the invention

[0003] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: a lighting fixture with adjustable light range, comprising a top protective cover, a driving motor is fixed at the center position of the top of the inner wall of the top protective cover, an intermediate transmission shaft is fixed on the output shaft of the driving motor, a reset guide rotating rod is coaxially fixed to the bottom end of the intermediate transmission shaft, a reflector hanger is fixed on the reset guide rotating rod, a plurality of reflectors are movably installed in a circular array on the reflector hanger, and a reflective layer is provided on a side of all reflectors facing away from the reset guide rotating rod; a temperature conducting lamp holder is fixed on the top of the reset guide rotating rod, and the temperature conducting lamp holder is fixed with the same number of luminous LED lamps as the reflectors, and the positions of the luminous LED lamps and the reflectors correspond, so that the reflectors can reflect the light emitted by the luminous LED lamps, and a reflective condenser that can be displaced along the axial direction of the reset guide rotating rod is provided on the outer side of all reflectors for reflecting the light of the luminous LED lamp reflected from the reflectors.

[0004] Preferably, a heat sink is fixed on the temperature-conducting lamp frame, and a guide cone is provided at the inner center of the heat sink to guide the flow of air. A guide tube is provided above the heat sink. There is no connection between the guide tube and the heat sink. The guide tube is fixed above the center of the supporting annular table through an intermediate connecting frame, and the supporting annular table is fixed to the bottom of the inner wall of the top protective cover.

[0005] Preferably, two screws are provided on the upper surface of the supporting annular table surface so as to slide along its own axial direction, and a nut gear is provided on each screw rod with a threaded transmission sleeve. The nut gear and the supporting annular table surface are rotatably arranged, and the nut gear cannot be displaced along the axial direction of the supporting annular table surface. The two nut gears are meshed and transmitted by adjusting the gear ring.

[0006] Preferably, an adjustment drive motor is fixed on the inner wall of the top protective cover, and an adjustment active gear meshing with the adjustment gear ring is fixedly installed on the output shaft of the adjustment drive motor. A plurality of first air holes and second air holes are opened on the circumferential surface of the top protective cover to facilitate the flow of air.

[0007] Preferably, a planet carrier support ring is coaxially fixed on the guide cylinder, and an electromagnet is coaxially fixed on the planet carrier support ring, wherein the planet carrier support ring is rotatably matched with the planet carrier by being embedded, and the planet carrier can only rotate within the planet carrier support ring and cannot axially displace within the planet carrier support ring, wherein two symmetrically arranged planetary gears are rotatably mounted on the planet carrier.

[0008] Preferably, a synchronous gear ring is coaxially rotatably installed on the planet carrier support ring, and the synchronous gear ring is fixedly matched with the intermediate transmission shaft through a synchronous gear ring connecting rod, wherein the electromagnet cooperates with the magnetic force of the planet carrier, and a central gear is also rotatably installed at the rotation center of the planet carrier, and the central gear and the synchronous gear ring are meshed and transmitted through the planetary gears, wherein a cooling fan is also coaxially fixed on the central gear.

[0009] Preferably, an outer protective cover is provided on the outer side of the reflective condenser, and the outer protective cover is fixed on the top protective cover.

[0010] Preferably, a reset magnetic base is fixed to the bottom end of the reset guide rotating rod, and a reset rod connecting block is also slidably sleeved on the circumferential surface of the reset guide rotating rod. The reset rod connecting block and the bottom end of each reflector facing the reset guide rotating rod are movably connected through the reset rod, and a reset spring is fixed between the reset rod connecting block and the reset magnetic base, and the reset spring is arranged around the outer surface of the reset guide rotating rod.

[0011] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention drives the intermediate transmission shaft and the reset guide rotating rod to rotate through the driving motor, thereby adjusting the inclination angle of the reflector, and realizing the range adjustment of light from vertical direct to circular scanning. Users can choose centralized lighting or large-scale circular lighting according to different scene requirements, which improves the applicability and practicality of the lamp; (2) The present invention adopts a combination of a temperature-conducting lamp holder, a heat sink and an intelligently controlled heat dissipation fan to form an active heat dissipation system. When the temperature of the luminous LED lamp rises, the thermistor senses the temperature change, drives the electromagnet to attract the planetary holder, increases the speed of the heat dissipation fan, accelerates heat dissipation, avoids damage to the lamp due to overheating, and extends the service life of the product; (3) The setting of the guide cone and the guide tube of the present invention guides the air flow path, cooperates with the function of the heat dissipation fan, and forms an efficient heat dissipation channel. Under the flushing of the airflow, the heat sink is quickly taken away, ensuring the stable operation of the LED lamp and improving the overall heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0013] Figure 2 It is a schematic diagram of the structure of the reflective condenser of the present invention.

[0014] Figure 3 It is a schematic diagram of the structure of the planet carrier support ring of the present invention.

[0015] Figure 4 It is a schematic diagram of the structure of the guide cone of the present invention.

[0016] Figure 5 It is a structural schematic diagram of the reset pull rod of the present invention.

[0017] In the figure: 101-reflector hanger; 102-reflector; 103-reset pull rod; 104-reset guide rotating rod; 105-reset spring; 106-reset magnetic base; 107-reset pull rod connecting block; 108-luminous LED lamp; 109-heat conduction lamp holder; 110-heat sink; 111-flow guide cone; 112-intermediate transmission shaft; 113-outer protective cover; 114-central gear; 115-cooling fan; 116-planet carrier support ring; 117-guide Flow tube; 118-electromagnet; 119-synchronous gear ring connecting rod; 120-planetary gear; 121-synchronous gear ring; 122-planetary carrier; 123-intermediate connecting frame; 124-supporting annular table; 125-screw; 126-nut gear; 127-adjusting gear ring; 128-reflective condenser; 129-top protective cover; 130-first air hole; 131-second air hole; 132-driving motor; 133-adjusting driving motor; 134-adjusting driving gear. DETAILED DESCRIPTION

[0018] The following is combined with Figure 1-5 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0019] The present invention provides a lighting fixture with adjustable light range, comprising a top protective cover 129, a driving motor 132 is fixed at the center of the top of the inner wall of the top protective cover 129, an intermediate transmission shaft 112 is fixed on the output shaft of the driving motor 132, a reset guide rotating rod 104 is coaxially fixed to the bottom end of the intermediate transmission shaft 112, a reflector hanger 101 is fixed on the reset guide rotating rod 104, a plurality of reflectors 102 are movably installed in a circular array on the reflector hanger 101, and all the reflectors 102 are facing away from the reset guide rotating rod 104. A reflective layer is provided; a heat-conducting lamp holder 109 is fixed to the top of the reset guide rotating rod 104, and the heat-conducting lamp holder 109 is fixed with the same number of luminous LED lamps 108 as the reflective plate 102, and the positions of the luminous LED lamps 108 and the reflective plate 102 correspond to each other, so that the reflective plate 102 can reflect the light emitted by the luminous LED lamps 108, and a reflective condenser 128 that can be displaced along the axial direction of the reset guide rotating rod 104 is sleeved on the outer side of all reflective plates 102, which is used to reflect the light of the luminous LED lamps 108 reflected from the reflective plate 102.

[0020] A heat sink 110 is fixed on the heat conducting lamp frame 109, and a guide cone 111 is provided at the inner center of the heat sink 110 to guide the flow of air. A guide cylinder 117 is provided above the heat sink 110. There is no connection between the guide cylinder 117 and the heat sink 110. The guide cylinder 117 is fixed above the center of the support annular table 124 through an intermediate connecting frame 123, and the support annular table 124 is fixed to the bottom of the inner wall of the top protective cover 129. Two screw rods 125 are slidably arranged on the upper surface of the support annular table 124 along its axial direction, and each screw rod 125 is provided with a nut gear 126 on a threaded transmission sleeve. The nut gear 126 is rotatably arranged with the support annular table 124, and the nut gear 126 cannot be displaced along the axial direction of the support annular table 124. The two nut gears 126 are meshed and transmitted by adjusting the gear ring 127. An adjusting drive motor 133 is also fixed on the inner wall of the top protective cover 129, and an adjusting driving gear 134 meshing with the adjusting gear ring 127 is fixedly installed on the output shaft of the adjusting drive motor 133. A plurality of first air holes 130 and second air holes 131 are provided on the circumferential surface of the top protective cover 129 to facilitate the flow of air.

[0021] A planet carrier support ring 116 is coaxially fixed on the guide tube 117, and an electromagnet 118 is coaxially fixed on the planet carrier support ring 116. A planet carrier 122 is rotatably matched with the planet carrier support ring 116 by embedding. The planet carrier 122 can only rotate in the planet carrier support ring 116 and cannot be axially displaced in the planet carrier support ring 116. Two symmetrically arranged planetary gears 120 are rotatably mounted on the planet carrier 122. A synchronous gear ring 121 is also coaxially rotatably mounted on the planet carrier support ring 116. The synchronous gear ring 121 is fixedly matched with the intermediate transmission shaft 112 through a synchronous gear ring connecting rod 119. The electromagnet 118 is magnetically matched with the planet carrier 122. A central gear 114 is also rotatably mounted at the rotation center of the planet carrier 122. The central gear 114 and the synchronous gear ring 121 are meshed and transmitted through the planetary gear 120. A cooling fan 115 is also coaxially fixed on the central gear 114. An outer protective cover 113 is sleeved on the outer side of the reflective condenser 128, and the outer protective cover 113 is fixed on the top protective cover 129. A reset magnetic base 106 is fixed to the bottom end of the reset guide rotating rod 104, and a reset pull rod connecting block 107 is also slidably sleeved on the circumferential surface of the reset guide rotating rod 104. The reset pull rod connecting block 107 and the bottom end of each reflector 102 facing the reset guide rotating rod 104 are movably connected through the reset pull rod 103. A reset spring 105 is fixed between the reset pull rod connecting block 107 and the reset magnetic base 106, and the reset spring 105 is arranged around the outer surface of the reset guide rotating rod 104.

[0022] The working principle of a lighting fixture with adjustable light range disclosed in the present invention is as follows: the light-emitting LED lamp 108 is started, and the light emitted by the light-emitting LED lamp 108 will directly irradiate vertically downward, and at the same time, part of the scattered light will be refracted to the bottom through the reflective condenser 128. If the irradiation range of the light of the light-emitting LED lamp 108 is adjusted (annular scanning irradiation), the output shaft of the driving motor 132 is controlled to rotate, and the output shaft of the driving motor 132 drives the intermediate transmission shaft 112 and the reset guide rotating rod 104 to rotate. The rotation of the reset guide rotating rod 104 will drive all the reflectors 102 to rotate through the reflector hanger 101, and the rotation of all the reflectors 102 will cause themselves to swing outward under the action of centrifugal force. , thereby swinging itself from a vertical state (or a state parallel to the axial direction of the reset guide rotating rod 104) to a tilted state. During this process, the reflector 102 will slide on the reset guide rotating rod 104 by pulling the reset rod connecting block 107 through the reset rod 103, and compress the reset spring 105 at the same time. When the reflector 102 stops rotating, all the reflectors 102 can be reset under the action of the reset spring 105. If the lamp is installed vertically, a lamp without the reset rod 103, the reset guide rotating rod 104, and the reset spring 105 accessories can be selected, and the reset magnetic base 106 can be directly matched with the bottom magnetic force of the reflector 102 (it can still be reset under the cooperation of gravity and magnetism). The light emitted by the luminous LED lamp 108 will first shine on the inclined reflector 102, and then the reflector 102 will reflect the light to the ground. As the rotation speed of the reflector 102 increases, the inclination angle of the reflector 102 will gradually increase. At this time, the diameter of the ring light on the ground will gradually increase and then shrink. This is because, as the inclination angle of the reflector 102 increases, the light reflected by the reflector 102 will be reflected on the reflective condenser 128, and then reflected by the reflective condenser 128 for a second time, reflecting the light toward the axis of the reflective condenser 128 (reflecting inward). When the reflector 102 swings to the maximum angle, the reflector 102 reflects the light emitted by the luminous LED lamp 108 to the top of the reflective condenser 128, and then the reflective condenser 128 reflects it to the center of the circle on the ground, realizing the effect of light gathering (similar to focusing), which can improve the brightness of the light directly below the lamp. The effect of the light reflected on the ground by different swinging angles of the reflector 102 can be adjusted by controlling the movement of the reflective condenser 128, specifically, by adjusting the driving motor 133 to drive the adjusting active gear 134 to rotate, the adjusting active gear 134 drives the adjusting gear ring 127 to rotate, the adjusting gear ring 127 drives the two nut gears 126 to rotate, the two nut gears 126 drive the two screws 125 to move along their own axial direction, and then drive the reflective condenser 128 to move, so as to adjust the position of the reflective condenser 128, so that the final light spot position on the ground can be changed without changing the swinging angle of the reflector 102.

[0023] When the light-emitting LED lamp 108 works for a long time, it will generate a lot of heat. Then the heat of the light-emitting LED lamp 108 will be transferred to the heat sink 110 through the temperature-conducting lamp holder 109, and then the heat sink 110 will cool the light-emitting LED lamp 108. In order to ensure the heat dissipation efficiency of the heat sink 110 to the light-emitting LED lamp 108, it is necessary to dissipate heat from the heat sink 110. Therefore, a thermistor is set in the light-emitting LED lamp 108 or the heat sink 110, and the thermistor is connected in series with a fixed resistor (or a potentiometer with adjustable resistance, which can adjust the trigger threshold) in a DC power supply, and then the two ends of the fixed resistor are connected to the base and emitter of an NPN transistor (high potential is connected to the base, and low potential is connected to the emitter), and then the collector and emitter of the NPN transistor and the electromagnet 118 are connected in series in another DC circuit. When the temperature of the light-emitting LED lamp 108 is too high, the resistance of the thermistor will decrease, thereby causing the voltage at both ends of the fixed resistor to increase and reach the trigger voltage of the NPN transistor. At this time, the electromagnet 118 starts to be energized to generate magnetic force, and the electromagnet 118 will attract and constrain the planet carrier 122. At the beginning, the rotation of the intermediate transmission shaft 112 will drive the synchronous gear ring 121 to rotate through the synchronous gear ring connecting rod 119. The synchronous gear ring 121 cannot drive the central gear 114 to rotate through the planetary gear 120 (without considering the friction force, it will actually drive it to rotate at a low speed, because the central gear 114 is connected to the cooling fan 115, and the rotation of the cooling fan 115 needs to overcome air resistance). This is because the planet carrier 122 is free to rotate in the planet carrier support ring 116 when there is no magnetic force constraint of the electromagnet 118. Therefore, when the rotation of the planet carrier 122 is restricted, the revolution of the planetary gear 120 on the planet carrier 122 will be restricted, so more power will be transmitted from the intermediate transmission shaft 112 to the cooling fan 115 and the central gear 114, and the speed of the cooling fan 115 will increase (overcoming air resistance). Because the NPN transistor has the function of amplifying current, as the temperature of the light-emitting LED lamp 108 increases, the potential difference between the base and the emitter of the NPN transistor will increase, thereby causing the current passing between the collector and the emitter to increase. At this time, the magnetic force of the electromagnet 118 will increase, and thus the restraining force on the planet carrier 122 will increase, thereby increasing the transmission efficiency between the intermediate transmission shaft 112 and the cooling fan 115, and thus increasing the rotation speed of the cooling fan 115. The increase in the rotation speed of the cooling fan 115 will drive more air to flow, and the cooling fan 115 drives the air to flow toward the heat sink 110 under the guidance of the guide cone 111, thereby dissipating the heat from the heat sink 110.

Claims

1. A lighting fixture with adjustable light range, characterized in that: The invention comprises a top protective cover (129), a driving motor (132) being fixed at the center position of the top of the inner wall of the top protective cover (129), an intermediate transmission shaft (112) being fixed on the output shaft of the driving motor (132), a reset guide rotating rod (104) being coaxially fixed on the bottom end of the intermediate transmission shaft (112), a reflector hanger (101) being fixed on the reset guide rotating rod (104), a plurality of reflectors (102) being movably mounted in a circular array on the reflector hanger (101), and a reflective layer being provided on a side of all the reflectors (102) facing away from the reset guide rotating rod (104); A heat conducting lamp holder (109) is fixed to the top end of the reset guide rotating rod (104), and the heat conducting lamp holder (109) is fixed with the same number of light emitting LED lamps (108) as the reflective plate (102). The positions of the light emitting LED lamps (108) and the reflective plate (102) correspond to each other, so that the reflective plate (102) can reflect the light emitted by the light emitting LED lamps (108). A reflective condenser (128) that can be displaced along the axial direction of the reset guide rotating rod (104) is sleeved on the outer side of all the reflective plates (102) and is used to reflect the light of the light emitting LED lamps (108) reflected from the reflective plate (102).

2. The lighting fixture with adjustable light range according to claim 1, characterized in that: A heat sink (110) is fixed on the temperature-conducting lamp frame (109); a flow-guiding cone (111) is provided at the inner center of the heat sink (110) for guiding the flow of air; a flow-guiding cylinder (117) is provided above the heat sink (110); there is no connection between the flow-guiding cylinder (117) and the heat sink (110); the flow-guiding cylinder (117) is fixed in the air above the center of the supporting annular table (124) via an intermediate connecting frame (123); and the supporting annular table (124) is fixed to the bottom of the inner wall of the top protective cover (129).

3. The lighting fixture with adjustable light range according to claim 2, characterized in that: Two screw rods (125) are slidably arranged on the upper surface of the supporting annular table (124) along its axial direction, and a nut gear (126) is provided on each screw rod (125) through a threaded transmission sleeve. The nut gear (126) and the supporting annular table (124) are rotatably arranged, and the nut gear (126) cannot be displaced along the axial direction of the supporting annular table (124). The two nut gears (126) are meshed and transmitted via an adjusting gear ring (127).

4. The lighting fixture with adjustable light range according to claim 3, characterized in that: An adjusting drive motor (133) is also fixed on the inner wall of the top protective cover (129), and an adjusting driving gear (134) meshing with the adjusting gear ring (127) is fixedly mounted on the output shaft of the adjusting drive motor (133). A plurality of first air holes (130) and second air holes (131) are provided on the circumferential surface of the top protective cover (129) to facilitate air flow.

5. The lighting fixture with adjustable light range according to claim 4, characterized in that: A planet carrier support ring (116) is coaxially fixed to the guide tube (117), and an electromagnet (118) is coaxially fixed to the planet carrier support ring (116), wherein the planet carrier support ring (116) is rotatably matched with a planet carrier (122) by way of embedding, and the planet carrier (122) can only rotate within the planet carrier support ring (116) and cannot axially displace within the planet carrier support ring (116), wherein two symmetrically arranged planetary gears (120) are rotatably mounted on the planet carrier (122).

6. The lighting fixture with adjustable light range according to claim 5, characterized in that: A synchronous gear ring (121) is coaxially rotatably mounted on the planet carrier support ring (116). The synchronous gear ring (121) is fixedly matched with the intermediate transmission shaft (112) via a synchronous gear ring connecting rod (119), wherein the electromagnet (118) and the planet carrier (122) are magnetically matched, and a central gear (114) is rotatably mounted at the rotation center of the planet carrier (122). The central gear (114) and the synchronous gear ring (121) are meshed and driven via a planetary gear (120), wherein a cooling fan (115) is coaxially fixed on the central gear (114).

7. The lighting fixture with adjustable light range according to claim 6, characterized in that: An outer protective cover (113) is sleeved on the outer side of the reflective condenser cover (128), and the outer protective cover (113) is fixed on the top protective cover (129).

8. The lighting fixture with adjustable light range according to claim 7, characterized in that: A reset magnetic base (106) is fixed to the bottom end of the reset guide rotating rod (104), a reset pull rod connecting block (107) is slidably sleeved on the circumferential surface of the reset guide rotating rod (104), the reset pull rod connecting block (107) and the bottom end of each reflector (102) facing the reset guide rotating rod (104) are movably connected via a reset pull rod (103), a reset spring (105) is fixed between the reset pull rod connecting block (107) and the reset magnetic base (106), and the reset spring (105) is arranged around the outer surface of the reset guide rotating rod (104).

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