CN201748343U

CN201748343U - Focusing mechanism of LED spotlight

Info

Publication number: CN201748343U
Application number: CN201020507737XU
Authority: CN
Inventors: 甄何平; 孙红霞
Original assignee: Beijing Xingguang Film and TV Equipment Technologies Co Ltd
Current assignee: Beijing Xingguang Film and TV Equipment Technologies Co Ltd
Priority date: 2010-08-27
Filing date: 2010-08-27
Publication date: 2011-02-16
Anticipated expiration: 2020-08-27
Also published as: EP2610552B1; EP2610552A4; WO2012025068A1; EP2610552A1

Abstract

A focusing mechanism of an LED spotlight belongs to an illumination appliance and comprises an LED light source assembly with LEDs (4) integrated in one plane, a lens assembly and a motor drive device; wherein, the motor (13) in the motor drive device is provided with a motor shaft (12) with external screw threads, the motor with the external screw threads and a motor connecting tray (11) with internal screw threads are in the screwing connection; a lever connecting board (6) is fixedly connected with the motor connecting tray (11); one end of a guide post (15) is fixed on a motor support (14), the other end of the guide post (15) passes through a round hole of the lever connecting board (6); one end of the lever (9) is hinged with the lever connecting board (6), the other end of the lever (9) is hooked with a square hole on a fixing column (17); a spring (20) is sleeved on a positioning column (21) which is fixed with a light source housing (16); during focusing, the lens assembly moves along a central axis of the spotlight stably and exactly driven by the motor (13); the focusing mechanism of the utility model implements the exact and stable focusing of a high power LED spotlight, ensures the homogeneities of light spots irradiated by each LED (4), the light efficiency is good, the brightness is high, and the utility model is applicable to the manufacture of high power LED screen and video lamps.

Description

A kind of LED condenser lamp focusing mechanism

Technical field

The utility model belongs to ligthing paraphernalia, relates to a kind of LED condenser lamp focusing mechanism, and it is used for the great power LED spotlight.

Background technology

Traditional stage projector focus adjusting mechanism is made up of lens, light source, reflector, adopts following structure mostly: light source is installed on the lamp socket, and the lamp socket back is equipped with reflector, and light source is positioned on the reflector axis; Position between lens and base is relatively-stationary; Lamp socket is installed on the base, regulates making the lamp socket band light source with reflector moves forward and backward by leading screw, adjusts the spotlight focal length with the distance between change light source, reflector and the lens; Light source, and is adjusted the irradiates light spot diameter and is satisfied the performance needs to stage through reflector reflection, lens refractive illumination, and this kind method is suitable for adopting the focusing of spotlight of the spot light type of halogen tungsten lamp.

Yet, light source adopts the spotlight of LED then different, single power of LED is little, 1～5W only, wanting to make large-power lamp needs the plurality of LEDs integration mode to improve power, increase brightness, in one plane forms area source because of plurality of LEDs is integrated, because the light source area is big, to accomplish during focusing steadily to move, the focusing high conformity of each luminous point, error be the comparison difficulty for a short time, and be bigger to the LED spotlight difficulty more than the 200W, is LED video display spotlight lamp technical problem extremely to be solved.

Summary of the invention

The technical problem that solves:

A kind of LED condenser lamp focusing mechanism is provided, can realizes steadily focusing of high-power spotlight (400W), the focusing high conformity of each luminous point, brightness height.

The technical scheme that adopts:

A kind of LED condenser lamp focusing mechanism, comprise the led light source assembly that constitutes by the aluminium base circuit board that has welded plurality of LEDs, by the lens pressing plate will with above-mentioned plurality of LEDs one to one lens be fixed on lens subassembly, motor driver and the light source shell that constitutes on the lens carrier, it is characterized in that: the motor in the described motor driver is affixed by electric machine support and light source shell; Motor has externally threaded motor shaft and is spirally connected with the motor terminal pad that has internal thread; Lever connecting plate and motor terminal pad are affixed; Lead one end is fixed on the electric machine support, and the other end passes the circular hole of lever connecting plate; One end and the lever connecting plate of lever are hinged, the square hole clasp joint on the other end and the fixed leg; The fulcrum of lever and the bottom surface of light source shell is slideable contacts; Described fixed leg one end pass lens carrier, lens pressing plate and the cover back of being located by connecting with the female locking of locking, the other end passes behind aluminium base circuit board, the light source shell and the lever clasp joint; Spring housing is at one end affixed with light source shell, and the other end passes on the reference column of aluminium base circuit board, and is pressed in the groove of lens carrier and between the aluminium base circuit board.

Beneficial effect:

The utility model is simple in structure, and cost is low, has solved the inaccurate difficult point of great power LED condenser lamp focusing; Realize that integrated plurality of LEDs spotlight in one plane can steadily focus, and guaranteed that hot spot uniformity, error that each LEDs irradiates are little, light efficiency good, brightness is high, is applicable to the manufacturing of great power LED video display light fixture.

Description of drawings

Fig. 1, LED condenser lamp focusing mechanism decomposing schematic representation;

Fig. 2, press the A shown in Fig. 1 to view;

Fig. 3, press the A-A cutaway view shown in Fig. 2;

Fig. 4, press the B shown in Fig. 1 to view;

Fig. 5, press the part shown in Fig. 3 and amplify I figure.

Number in the figure: 1 lens; 2 lens pressing plates; 3 lens carriers; 4LED; 5 aluminium base circuit boards; 6 lever connecting plates; 7 lockings are female; 8 springs; 9 levers; 10 reference columns; 11 motor terminal pads; 12 motor shafts; 13 motors; 14 electric machine supports; 15 leads; 16 light source shells; 17 fixed legs; 18 covers that are located by connecting.

The specific embodiment

Further explanation in detail in conjunction with the accompanying drawings:

Shown in Fig. 1～5, a kind of LED condenser lamp focusing mechanism comprise the led light source assembly that constitutes by the aluminium base circuit board 5 that has welded plurality of LEDs 4, by lens pressing plate 2 will with above-mentioned plurality of LEDs 4 one to one lens 1 be fixed on lens subassembly, motor driver and the light source shell 16 that constitutes on the lens carrier 3; The aluminium base circuit board 5 usefulness screws that are welded with LED4 are fastened in the light source shell 16 corresponding holes; Lens 1 scioptics pressing plate 2 is fixed in the groove of lens carrier 3, become one with fastening lens 1, lens pressing plate 2, the lens carrier 3 of making of screw, and with aluminium base circuit board 5 between have lead 15 to be connected, can move axially simultaneously; Motor 13 in the described motor driver is affixed by electric machine support 14 and light source shell 16; Motor 13 has externally threaded motor shaft 12 and is spirally connected with the motor terminal pad 11 that has internal thread; Lever connecting plate 6 is affixed with motor terminal pad 11; Lead 15 axially is provided with, and the one end is fixed on the electric machine support 14, and the other end passes the circular hole on the lever connecting plate 6; The effect of lead 15 is to stop motor terminal pad 11 to rotate when motor shaft 12 rotation, and motor terminal pad 11 can moving axially along motor shaft 12 with lever connecting plate 6; Lever 9 has three, and the ratio of a end of lever 9 and the b end of distance between fulcrum c and lever 9 and the distance between fulcrum c is between 6～7; The a end of lever 9 is hinged with lever connecting plate 6, the square hole clasp joint on b end and the fixed leg 17; Slideable the contacting in bottom surface of the fulcrum c of lever 9 and light source shell 16; Described fixed leg 17 and lever 9 supporting and axial settings, one end pass lens carrier 3, lens pressing plate 2 and cover 18 backs that are located by connecting female 7 lockings of locking, and the b end hook that the other end passes aluminium base circuit board 5, light source shell 16 backs and lever 9 connects; Spring 8 covers at one end are fixed together with light source shell 16, and the other end passes on the reference column 10 of aluminium base circuit board 5, is pressed in the groove of lens carrier 3; When needs are focused, motor 13 just or counter-rotating drive motor shaft 12 rotations, thereby make motor terminal pad 11 with lever connecting plate 6 moving axially along motor shaft 12, lever connecting plate 6 and then moves a end of lever 9, because lever principle makes the b end of lever 9 do the counter motion of holding with a, and make fixed leg 17 move axially, thereby make that also lens subassembly moves axially; Lever 9 fulcrum c act on the bottom surface of light source shell 16, and when the mobile big distance of a of lever 9 end, the then mobile very small distance of b end that fulcrum c is outer only is about the former 1/6, has just reached the purpose of the displacement of meticulous adjusting lens subassembly; Utilize the supported at three point principle to make simultaneously to move axially more steady.

The utility model focus adjusting mechanism has been realized the steady meticulous focusing of great power LED spotlight, has guaranteed the hot spot uniformity that each LEDs 4 irradiates, and light efficiency is good, and the brightness height is applicable to the manufacturing of great power LED video display light fixture.

Describedly axially be meant perpendicular to the direction shown in the center line O-O ' of the bottom surface of aluminium base circuit board 5, lens pressing plate 2 and light source shell 16, be in the present invention motor shaft 12 axially.

Claims

1. LED condenser lamp focusing mechanism, comprise the led light source assembly that constitutes by the aluminium base circuit board that has welded plurality of LEDs, by the lens pressing plate will with above-mentioned plurality of LEDs one to one lens be fixed on lens subassembly, motor driver and the light source shell that constitutes on the lens carrier, it is characterized in that: the motor in the described motor driver is affixed by the back side of electric machine support and light source shell; Motor has externally threaded motor shaft and is spirally connected with the motor terminal pad that has internal thread; Lever connecting plate and motor terminal pad are affixed; Lead one end is fixed on the electric machine support, and the other end passes the circular hole of lever connecting plate; Lever has three, and an end and the lever connecting plate of lever are hinged, the square hole clasp joint on the other end and the fixed leg, the fulcrum of lever and the bottom surface of light source shell is slideable contacts; Described fixed leg one end pass lens carrier, lens pressing plate and the cover back of being located by connecting with the female locking of locking, the other end passes behind aluminium base circuit board, the light source shell and the lever clasp joint; Spring housing is at one end affixed with light source shell, and the other end passes on the reference column of aluminium base circuit board, and is pressed in the groove of lens carrier and between the aluminium base circuit board.