A lighting fixture with an adjustable light range

Abstract

The present invention discloses a lighting fixture with an adjustable light range, which relates to the technical field of lighting fixtures. The present invention includes components such as a driving motor, a reflector, a light-emitting LED lamp, a reflective condenser cover, etc. By rotating the reflector, the light irradiation range is adjusted to achieve the conversion from concentrated lighting to circular scanning. The lighting fixture is equipped with an efficient heat dissipation system, including a temperature-conducting lamp holder, heat sinks, and a smart-controlled cooling fan, ensuring the stable operation of the LED lamp. The automatic reset mechanism enables the reflector to automatically return to its initial position after stopping rotation, making the operation convenient. The optimized air flow design improves the heat dissipation efficiency.

Description

Technical Field

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

[0002] Currently, most lighting fixtures on the market adopt a design with a fixed light illumination range, that is, the irradiation angle and range of the light are basically unadjustable after installation. This design can meet the basic lighting needs in certain fixed scenarios, but it has great limitations in applications where the light range needs to be flexibly adjusted. For example, in places such as shopping malls, exhibition halls, and stage performances, different activities and display contents require different light distributions and brightness levels. However, traditional fixed-lighting fixtures cannot adjust the light range in real time according to actual needs, resulting in an unsatisfactory lighting effect, unable to highlight key points or create a specific atmosphere. In terms of heat dissipation, the heat dissipation method of traditional fixtures mainly relies on passive heat dissipation, relying on natural convection and the design of heat sinks to dissipate heat. However, with the development of LED technology, the power and brightness of fixtures have been continuously increasing, and the generated heat has also increased accordingly. The passive heat dissipation method is ineffective in high-power fixtures, with low heat dissipation efficiency and unable to effectively reduce the internal temperature of the fixtures. Long-term operation will cause the LED chips to overheat, accelerate light attenuation, shorten the service life, and even pose safety hazards. Summary of the Invention

[0003] To overcome the defects of the above-mentioned prior art, the present invention provides the following technical solution: A lighting fixture with an adjustable light range, including a top protective cover. At the center position of the inner wall top of the top protective cover, a driving motor is fixed. On the output shaft of the driving motor, an intermediate transmission shaft is fixed. At the bottom end of the intermediate transmission shaft, a reset guiding rotating rod is coaxially fixed. On the reset guiding rotating rod, a reflector hanger is fixed. A plurality of reflectors are movably installed in a circular array on the reflector hanger. On the side of all reflectors facing away from the reset guiding rotating rod, a reflective layer is provided; at the top end of the reset guiding rotating rod, a temperature-guiding lamp holder is fixed. On the temperature-guiding lamp holder, the same number of light-emitting LED lamps as the reflectors are fixed. The positions of the light-emitting LED lamps correspond to those of the reflectors, so that the reflectors can reflect the light emitted by the light-emitting LED lamps. Outside all the reflectors, a reflective condenser cover that can displace along the axial direction of the reset guiding rotating rod is sleeved, which is used to reflect the light of the light-emitting LED lamps reflected from the reflectors.

[0004] Preferably, heat sinks are fixed on the temperature-guiding lamp holder. At the center of the inner side of the heat sinks, a flow guiding cone is provided for guiding the flow of air. Above the heat sinks, a flow guiding cylinder is provided. There is no connection relationship between the flow guiding cylinder and the heat sinks. The flow guiding cylinder is fixed above the center of the supporting circular tabletop through an intermediate connecting frame in an overhead manner. The supporting circular tabletop is fixed at the bottom of the inner wall of the top protective cover.

[0005] Preferably, two screws are slidably arranged along the axial direction of the upper surface of the supporting annular tabletop. A nut gear is threadedly sleeved on each screw, and the nut gear is rotatably arranged between the nut gear and the supporting annular tabletop. The nut gear cannot be axially displaced along the axial direction of the supporting annular tabletop. The two nut gears are meshed and driven by an adjusting gear ring.

[0006] Preferably, an adjusting drive motor is further fixed on the inner wall of the top protective cover. An adjusting driving gear meshed with the adjusting gear ring is fixedly installed on the output shaft of the adjusting drive motor. A plurality of first air holes and second air holes are formed 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 draft tube, and an electromagnet is coaxially fixed on the planet carrier support ring. The planet carrier is rotatably fitted on the planet carrier support ring by an embedding method. The planet carrier can only rotate within the planet carrier support ring and cannot be axially displaced within the planet carrier support ring. Two symmetrically arranged planet gears are rotatably installed on the planet carrier.

[0008] Preferably, a synchronous gear ring is also coaxially rotatably installed on the planet carrier support ring. The synchronous gear ring is fixedly fitted with the intermediate transmission shaft through a synchronous gear ring connecting rod. The electromagnet is magnetically fitted with the planet carrier. A central gear is also rotatably installed at the rotation center of the planet carrier. The central gear and the synchronous gear ring are meshed and driven by the planet gear. A heat dissipation fan is also coaxially fixed on the central gear.

[0009] Preferably, an outer protective cover is sleeved outside the reflection and condenser cover, and the outer protective cover is fixed on the top protective cover.

[0010] Preferably, a reset magnetic base is fixed at the bottom end of the reset guiding rotating rod. A reset pull rod connecting block is also slidably sleeved on the circumferential surface of the reset guiding rotating rod. The reset pull rod connecting block is movably connected with the bottom end of each reflecting plate facing the reset guiding rotating rod through a reset pull rod. A reset spring is fixed between the reset pull rod connecting block and the reset magnetic base, and the reset spring is arranged around the outer surface of the reset guiding rotating rod.

[0011] The present invention has the following beneficial effects compared with the prior art: (1) By driving the intermediate transmission shaft and the reset guiding rotating rod to rotate through the driving motor, the present invention adjusts the inclination angle of the reflector, realizing the range adjustment of the light from vertical direct irradiation to annular scanning. Users can choose concentrated lighting or large-range annular lighting according to different scene requirements, improving 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 intelligent-controlled radiator fan to form an active heat dissipation system. When the temperature of the illuminating LED lamp rises, the thermistor senses the temperature change, drives the electromagnet to attract the planet carrier, increases the rotation speed of the radiator fan, and accelerates the heat dissipation, avoiding the damage of the lamp caused by overheating and extending the service life of the product; (3) The setting of the diversion frustum and the diversion cylinder in the present invention guides the air flow path, and cooperates with the action of the radiator fan to form an efficient heat dissipation channel. Under the scouring of the air flow, the heat of 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 at the reflecting and condensing cover of the present invention.

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

[0015] Figure 4 It is a schematic diagram of the structure at the diversion frustum of the present invention.

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

[0017] In the figure: 101 - reflector hanger; 102 - reflector; 103 - reset pull rod; 104 - reset guiding rotating rod; 105 - reset spring; 106 - reset magnetic base; 107 - reset pull rod connecting block; 108 - illuminating LED lamp; 109 - temperature-conducting lamp holder; 110 - heat sink; 111 - diversion frustum; 112 - intermediate transmission shaft; 113 - outer protective cover; 114 - central gear; 115 - radiator fan; 116 - planet carrier support ring; 117 - diversion cylinder; 118 - electromagnet; 119 - synchronous tooth ring connecting rod; 120 - planet gear; 121 - synchronous tooth ring; 122 - planet carrier; 123 - intermediate connecting frame; 124 - supporting annular table top; 125 - screw; 126 - nut gear; 127 - adjusting tooth ring; 128 - reflecting and condensing cover; 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 OF THE INVENTION

[0018] The following will be combined with the attached Figures 1-5 drawings, and the technical solution of the present invention will be further described through specific embodiments.

[0019] The present invention provides a lighting fixture with an adjustable light range, including a top protective cover 129. At the center position of the inner wall top of the top protective cover 129, a driving motor 132 is fixed. On the output shaft of the driving motor 132, an intermediate transmission shaft 112 is fixed. At the bottom end of the intermediate transmission shaft 112, a reset guiding rotating rod 104 is coaxially fixed. On the reset guiding rotating rod 104, a reflector hanger 101 is fixed. A plurality of reflectors 102 are movably installed in a circular array on the reflector hanger 101. On the side of all the reflectors 102 facing away from the reset guiding rotating rod 104, a reflective layer is provided; at the top end of the reset guiding rotating rod 104, a temperature guiding lamp holder 109 is fixed. On the temperature guiding lamp holder 109, the same number of light-emitting LED lamps 108 as the reflectors 102 are fixed. The positions of the light-emitting LED lamps 108 correspond to those of the reflectors 102, so that the reflectors 102 can reflect the light emitted by the light-emitting LED lamps 108. Outside all the reflectors 102, a reflection and condensing cover 128 that can displace along the axial direction of the reset guiding rotating rod 104 is sleeved, which is used to reflect the light of the light-emitting LED lamps 108 reflected from the reflectors 102.

[0020] On the temperature guiding lamp holder 109, a heat sink 110 is fixed. At the inner center of the heat sink 110, a flow guiding conical platform 111 is provided for guiding the flow of air. Above the heat sink 110, a flow guiding cylinder 117 is provided. There is no connection relationship between the flow guiding cylinder 117 and the heat sink 110. The flow guiding cylinder 117 is fixed above the center of the supporting annular table surface 124 through an intermediate connecting frame 123 in an overhead manner. The supporting annular table surface 124 is fixed at the bottom of the inner wall of the top protective cover 129. On the upper surface of the supporting annular table surface 124, two screw rods 125 are slidably matched along its axial direction. On each screw rod 125, a nut gear 126 is threadedly sleeved. The nut gear 126 is rotatably matched with the supporting annular table surface 124, and the nut gear 126 cannot displace along the axial direction of the supporting annular table surface 124. The two nut gears 126 are meshed and driven through an adjusting gear ring 127. On the inner wall of the top protective cover 129, an adjusting driving motor 133 is also fixed. On the output shaft of the adjusting driving motor 133, an adjusting driving gear 134 meshed with the adjusting gear ring 127 is fixedly installed. On the circumferential surface of the top protective cover 129, a plurality of first air holes 130 and second air holes 131 are opened to facilitate the flow of air.

[0021] A planet carrier support ring 116 is coaxially fixed on the draft tube 117, and an electromagnet 118 is coaxially fixed on the planet carrier support ring 116. Among them, a planet carrier 122 is rotationally fitted on the planet carrier support ring 116 in an embedded manner. 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. Among them, two symmetrically arranged planet gears 120 are rotatably installed on the planet carrier 122. A synchronous gear ring 121 is also rotatably installed coaxially on the planet carrier support ring 116. The synchronous gear ring 121 is fixedly fitted with the intermediate transmission shaft 112 through a synchronous gear ring connecting rod 119. Among them, the electromagnet 118 is magnetically fitted with the planet carrier 122. A central gear 114 is also rotatably installed at the rotation center of the planet carrier 122. The central gear 114 and the synchronous gear ring 121 are meshed and driven through the planet gears 120. Among them, 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 reflection and condenser cover 128, and the outer protective cover 113 is fixed on the top protective cover 129. The bottom end of the reset guiding rotating rod 104 is fixed with a reset magnetic base 106. A reset pull rod connecting block 107 is also slidably sleeved on the circumferential surface of the reset guiding rotating rod 104. The reset pull rod connecting block 107 is movably connected with the bottom end of each reflector 102 facing the reset guiding rotating rod 104 through 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. The reset spring 105 is wound around the outer surface of the reset guiding rotating rod 104.

[0022] The working principle of a lighting fixture with an adjustable light range disclosed by the present invention is as follows: When the light-emitting LED lamp 108 is started, the light emitted by the light-emitting LED lamp 108 will directly irradiate vertically downward. At the same time, part of the scattered light will be refracted to directly below through the reflective condenser cover 128. If the irradiation range of the light of the light-emitting LED lamp 108 (circular scanning irradiation) is adjusted, the output shaft of the driving motor 132 will be controlled to rotate. The output shaft of the driving motor 132 drives the intermediate transmission shaft 112 and the reset guiding rotating rod 104 to rotate. When the reset guiding rotating rod 104 rotates, it will drive all the reflector plates 102 to rotate through the reflector hanger 101. When all the reflector plates 102 rotate, they will swing outward under the action of centrifugal force, so that they swing from the vertical state (or the state parallel to the axial direction of the reset guiding rotating rod 104) to the inclined state. During this process, the reflector plate 102 will pull the reset connecting block 107 of the reset pull rod to slide on the reset guiding rotating rod 104 through the reset pull rod 103, and at the same time compress the reset spring 105. When the reflector plate 102 stops rotating, all the reflector plates 102 can be reset under the action of the reset spring 105. If the lighting fixture is vertically installed, a lighting fixture without the accessories of the reset pull rod 103, the reset guiding rotating rod 104, and the reset spring 105 can be selected, and the reset magnetic base 106 can be directly magnetically matched with the bottom of the reflector plate 102 (it can still be reset under the cooperation of gravity and magnetism). The light emitted by the light-emitting LED lamp 108 will first irradiate on the inclined reflector plate 102, and then the reflector plate 102 will reflect the light to the ground. As the rotation speed of the reflector plate 102 increases, the inclination angle of the reflector plate 102 will gradually increase. At this time, the diameter of the circular light on the ground will gradually increase and then decrease. This is because as the inclination angle of the reflector plate 102 increases, the light reflected by the reflector plate 102 will be reflected onto the reflective condenser cover 128, and then the reflective condenser cover 128 will perform a secondary reflection, reflecting the light towards the axis of the reflective condenser cover 128 (reflecting inward). When the reflector plate 102 swings to the maximum angle, the reflector plate 102 reflects the light emitted by the light-emitting LED lamp 108 to the top of the reflective condenser cover 128, and then the reflective condenser cover 128 reflects it to the center of the ground, achieving the effect of light focusing (similar to focusing), so as to improve the light brightness directly below the lighting fixture. The effects of different swinging angles of the reflector plate 102 reflected on the ground can be adjusted by controlling the movement of the reflective condenser cover 128. Specifically, by adjusting the driving motor 133 to drive the adjusting driving gear 134 to rotate, the adjusting driving 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 screw rods 125 to move along their own axial directions, and then drive the reflective condenser cover 128 to move, so as to adjust the position of the reflective condenser cover 128. In this way, the position of the final light spot on the ground can be changed without changing the swinging angle of the reflector plate 102.

[0023] When the light-emitting LED lamp 108 works for a long time, it will generate a large amount of heat by itself. Then, the heat of the light-emitting LED lamp 108 will be transferred to the heat sink 110 through the heat-conducting lamp holder 109, and then the heat sink 110 will cool down the light-emitting LED lamp 108. In order to ensure the heat dissipation efficiency of the heat sink 110 for the light-emitting LED lamp 108, the heat sink 110 needs to be cooled. Therefore, a thermistor is set inside 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 value, which can adjust the trigger threshold) in a DC power supply. Then, the two ends of the fixed resistor are connected to the base and emitter of an NPN transistor (the high potential is connected to the base, and the low potential is connected to the emitter). 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 value of the thermistor will decrease at this time, resulting in an increase in the voltage across the fixed resistor and reaching 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 restrain the planet carrier 122. At first, 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 friction, in fact, it will drive its low-speed rotation because the central gear 114 is connected to the radiator fan 115, and the rotation of the radiator fan 115 needs to overcome air resistance). This is because the planet carrier 122 rotates freely within the planet carrier support ring 116 when there is no magnetic force restraint from 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 transferred from the intermediate transmission shaft 112 to the radiator fan 115 and the central gear 114. At this time, the rotation speed of the radiator 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 emitter of the NPN transistor will increase, resulting in an increase in the current passing between the collector and emitter. At this time, the magnetic force of the electromagnet 118 will increase. Therefore, the binding force on the planet carrier 122 will increase, and then the transmission efficiency between the intermediate transmission shaft 112 and the radiator fan 115 will increase, which also increases the rotation speed of the radiator fan 115. The increased rotation speed of the radiator fan 115 will drive more air to flow. The radiator fan 115 drives the air to flow towards the heat sink 110 under the guidance of the diversion cone 111, thereby dissipating heat from the heat sink 110.

Claims

1. An illumination lamp with an adjustable light range, characterized in that: It includes a top protective cover (129). At the center of the top inner wall of the top protective cover (129), a driving motor (132) is fixed. On the output shaft of the driving motor (132), an intermediate transmission shaft (112) is fixed. At the bottom end of the intermediate transmission shaft (112), a reset guiding rotating rod (104) is coaxially fixed. On the reset guiding rotating rod (104), a reflector hanger (101) is fixed. On the reflector hanger (101), a plurality of reflectors (102) are movably installed in a circular array. On the side of all the reflectors (102) facing away from the reset guiding rotating rod (104), a reflective layer is provided. The output shaft of the driving motor (132) drives the intermediate transmission shaft (112) and the reset guiding rotating rod (104) to rotate. The rotation of the reset guiding rotating rod (104) will drive all the reflectors (102) to rotate through the reflector hanger (101). The rotation of all the reflectors (102) will cause them to swing outwards under the action of centrifugal force, so that they swing from the vertical state or the state parallel to the axial direction of the reset guiding rotating rod (104) to the inclined state; At the top end of the reset guiding rotating rod (104), a temperature guiding lamp holder (109) is fixed. On the temperature guiding lamp holder (109), the same number of light-emitting LED lamps (108) as the reflectors (102) are fixed. The positions of the light-emitting LED lamps (108) correspond to those of the reflectors (102), so that the reflectors (102) can reflect the light emitted by the light-emitting LED lamps (108). Outside all the reflectors (102), a reflection and condensing cover (128) that can displace along the axial direction of the reset guiding rotating rod (104) is sleeved, which is used to reflect the light of the light-emitting LED lamps (108) reflected from the reflectors (102).

2. The lighting fixture with an adjustable light range according to claim 1, wherein: On the temperature guiding lamp holder (109), a heat sink (110) is fixed. At the center of the inner side of the heat sink (110), a flow guiding frustum (111) is provided, which is used to guide the flow of air. Above the heat sink (110), a flow guiding cylinder (117) is provided. There is no connection between the flow guiding cylinder (117) and the heat sink (110). The flow guiding cylinder (117) is fixed above the center of the supporting circular tabletop (124) through an intermediate connecting frame (123). The supporting circular tabletop (124) is fixed at the bottom of the inner wall of the top protective cover (129).

3. The lighting fixture with an adjustable light range according to claim 2, wherein: On the upper surface of the supporting circular tabletop (124), two screw rods (125) are slidably arranged along its axial direction. On each screw rod (125), a nut gear (126) is threadedly sleeved. The nut gear (126) is rotatably arranged with the supporting circular tabletop (124), and the nut gear (126) cannot displace along the axial direction of the supporting circular tabletop (124). The two nut gears (126) are meshed and driven through an adjusting gear ring (127).

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

5. The lighting fixture with an adjustable light range according to claim 4, characterized in that: A planet carrier support ring (116) is coaxially fixed on the draft tube (117). An electromagnet (118) is coaxially fixed on the planet carrier support ring (116). The planet carrier support ring (116) is rotationally fitted with a planet carrier (122) in an embedded manner. 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). Two symmetrically arranged planet gears (120) are rotatably installed on the planet carrier (122).

6. The lighting fixture with an adjustable light range according to claim 5, wherein: A synchronous gear ring (121) is also rotatably installed coaxially on the planet carrier support ring (116). The synchronous gear ring (121) is fixedly fitted with the intermediate transmission shaft (112) through a synchronous gear ring connecting rod (119). The electromagnet (118) is magnetically fitted with the planet carrier (122). A central gear (114) is also rotatably installed at the rotation center of the planet carrier (122). The central gear (114) and the synchronous gear ring (121) are meshed and driven through the planet gears (120). A heat dissipation fan (115) is also coaxially fixed on the central gear (114).

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

8. An illuminating fixture with an adjustable light range according to claim 7, characterized in that: A reset magnetic base (106) is fixed at the bottom end of the reset guiding rotating rod (104). A reset pull rod connecting block (107) is also slidably sleeved on the circumferential surface of the reset guiding rotating rod (104). The reset pull rod connecting block (107) is movably connected to the bottom end of each reflecting plate (102) facing the reset guiding rotating rod (104) through 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). The reset spring (105) is wound around the outer surface of the reset guiding rotating rod (104).

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