WO2012025068A1

WO2012025068A1 - Focusing mechanism for led spotlight

Info

Publication number: WO2012025068A1
Application number: PCT/CN2011/079077
Authority: WO
Inventors: 甄何平; 李泽青; 孙红霞
Original assignee: 北京星光影视设备科技股份有限公司
Priority date: 2010-08-27
Filing date: 2011-08-29
Publication date: 2012-03-01
Also published as: EP2610552B1; EP2610552A4; EP2610552A1; CN201748343U

Abstract

A focusing mechanism for an LED spotlight comprises a lens assembly (1 to 3), a light source assembly (4, 5), lever connectors (6, 9) and an electric motor drive device (11, 13, 14) axially disposed in succession along an electric motor shaft. The electric motor drive device is connected to the lever connectors. The lever connectors have at least three connection parts (c) connected to one side of a light source shell and at least three coordination parts (b) connected to the lens assembly. The connection parts of the lever connectors are located in the same plane perpendicular to the axial direction and evenly disposed in the same plane, and the coordination parts are located in another plane perpendicular to the axial direction and evenly disposed in the other plane. By application of the lever principle, the focusing mechanism for the LED spotlight achieves fine and stable focusing of a high power LED spotlight and ensures the evenness of the light spot illuminated by the large power LED spotlight with low focusing error, good lighting effects, and high brightness.

Description

LED spotlight focusing mechanism

The invention relates to an LED spotlight focusing mechanism, in particular to an LED spotlight focusing mechanism which can realize smooth focusing, and belongs to the field of stage film and television lighting.

Background technique

Conventional stage spotlights mostly use a point source type tungsten halogen lamp. The common tungsten halogen lamp focusing mechanism consists of a lens, a light source and a reflective bowl. Most of the following structures are used: The light source is mounted on the lamp holder, and a reflective bowl is mounted behind the lamp holder. The light source is located on the axis of the reflective bowl; between the lens and the base The position is relatively fixed; the lamp holder is mounted on the base, and the lamp holder is moved forward and backward with the light source and the reflective bowl by the screw adjustment to change the distance between the light source and the reflective bowl and the lens to adjust the focal length of the spotlight; The reflection and the lens are refracted to the stage, and the diameter of the illumination spot is adjusted to meet the performance needs.

However, due to the large gap between the lamp holder perforation and the focusing screw and the sliding rod during the movement of the lamp holder, when the focus is adjusted, the rotation of the focusing screw may cause the sliding plate to be unevenly moved during the movement. The air stroke is large, causing the light source components to tilt and vibrate during the focusing process, which results in the bulb center positioning in the light source assembly is not accurate enough, which affects the accuracy of focusing. Therefore, this method is only suitable for the adjustment of the point source type spotlight. focal.

LED (Light Emitting Diode) is a semiconductor that converts electrical energy into visible light. It has the advantages of long life, high luminous efficiency, no radiation and low power consumption. LED lighting sources have gradually become Future development direction. Therefore, the spotlight with LED as the light source will become an important lamp in the stage lighting. Since the power of a single LED is small, only 1~5W, it is usually necessary to integrate multiple LEDs into the luminaire to increase power and increase brightness. A surface light source formed by integrating a plurality of LEDs on one plane, because the light source area is large, the light source assembly and the lens assembly must be smoothly moved during focusing, and the focus adjustment of each light-emitting point is kept and the error is small. Affects the focusing effect of the spotlight to meet the requirements of use.

In the Chinese utility model patent with the patent number ZL 200820233726. X, the applicant discloses a zoom LED film and television stage spotlight with a focusing mechanism. The light source adopts an LED array module, and the light source is mounted on the fixing base. The fixing base is mounted on the light source bracket, and the movement of the light source on the lead screw is adjusted by the sliding seat, the lead screw and the adjusting button to realize focusing. The utility model adopts an aspherical lens and a threaded lens at the same time, and the scattered light of the surface light source is concentrated by irradiating the aspherical lens on the front surface of the LED array module, and then irradiated to the front threaded lens; by adjusting the light source component and the thread The relative distance of the lens to change the beam angle to achieve concentrating and astigmatism. This kind of focusing mechanism uses two lenses to achieve the focusing consistency, which makes the structure of the spotlight complicated. On the other hand, it is limited to the spotlight with the LED module as the light source and the power below 200W. The LED spotlight still can't achieve smooth focusing, so that the LEDs are in focus. Summary of the invention

In order to solve the above technical problem, the present invention provides an LED spotlight focusing mechanism, which has a simple structure. The high-power LED spotlight can be smoothly adjusted, and the focus of each light-emitting point is good, and the brightness is high.

In order to achieve the above object of the invention, the present invention adopts the following technical solutions:

An LED spotlight focusing mechanism comprises a light source housing, a light source assembly and a lens assembly located in the light source housing, and a motor driving device located outside the light source housing and having a motor shaft, wherein:

The LED spotlight focusing mechanism further includes a lever connector located outside the light source housing,

The lens assembly, the light source assembly, the lever connecting member and the motor driving device are axially distributed along a motor shaft in the motor driving device, and the motor driving device is connected to the lever connecting member. The lever connector has at least three connecting portions connected to one side of the light source housing, and at least three mating portions connected to the lens assembly, the connecting portion of the lever connecting member being perpendicular to The same plane of the axial direction is evenly distributed in the same plane, and the mating portion is located in another plane perpendicular to the axial direction and uniformly distributed in the other plane.

Preferably, the lever connecting member comprises a lever connecting plate and at least three levers of the same shape, the lever is evenly distributed on the lever connecting plate centered on an axis, the lever includes a first end point, a first a second end point and a fulcrum, wherein the first end point is connected to the lever connecting plate; the second end point is connected as the mating portion to the lens assembly through a connecting rod; the fulcrum serves as the connecting portion The surface of the light source housing is in contact.

The LED spotlight focusing mechanism provided by the invention uses a guiding column to limit the rotation of the motor connecting plate screwed with the motor shaft, so that when the focusing is performed, the lever connecting plate fixedly connected thereto is moved in the axial direction; The difference between the upper force point and the force point to the fulcrum achieves fine adjustment of the focal length of the lens. The LED spotlight focusing mechanism uses a plurality of levers to simultaneously move the lens assembly along the axis, so that the movement of the lens assembly is more stable, thereby ensuring the focusing consistency of the surface light source in the LED spotlight.

The invention is suitable for a plurality of low-power LEDs integrated in a single spotlight, in particular, a film and television stage spotlight with a large diameter and high power of the surface light source. The invention has the advantages of simple structure and low cost, solves the technical problem that the high-power LED spotlight is inaccurately adjusted, realizes the smooth focusing of the spotlight integrated with the LED on one plane, and ensures the uniformity of the spot of each LED. The focusing error is small, the light effect is good, and the brightness is high.

DRAWINGS

The invention will be further described in detail below with reference to the drawings and specific embodiments.

1 is an exploded perspective view of the focusing mechanism of the LED spotlight;

Figure 2 is an A-direction view of the focusing mechanism shown in Figure 1;

Figure 3 is a cross-sectional view taken along line A-A of the focusing mechanism shown in Figure 1;

Figure 4 is a partial enlarged view of the cross-sectional view taken along line A-A of Figure 3;

Figure 5 is a B-direction view of the focusing mechanism shown in Figure 1;

Figure 6 is a partial enlarged view of I ' shown in Figure 1;

Figure 7 is an enlarged schematic view of the lever connecting plate.

Number in the figure: 1: lens; 2: lens platen; 3: lens holder; 4: LED; 5: aluminum base board; 6: lever connection plate; 7: lock nut; 8: spring; 9: lever; 10: positioning post; 11 : motor lands; 12 : motor shaft; 13 : motor; 14: motor bracket; 15 : guide post; 16 : light source housing; 17 : connecting post; 18 : lever connecting hole; 19 : guide post connecting hole; : Positioning hole; 21 : Threaded hole.

detailed description

As shown in FIG. 1 , the embodiment provides an LED spotlight focusing mechanism, including a light source housing 16 , a light source assembly and a lens assembly located in the light source housing 16 , and a motor driving device and a lever located outside the light source housing 16 . Connector. Wherein, the lens assembly, the light source assembly, the lever connecting member and the motor driving device are sequentially distributed axially along the motor shaft 12 in the motor driving device, that is, sequentially arranged from left to right in the 0-0' direction shown in FIG. The motor drive unit moves the lens assembly axially relative to the light source assembly via a lever connection member rotatably coupled thereto.

As shown in FIGS. 1 and 3, the light source assembly includes a plurality of LEDs 4 and an aluminum-based circuit board 5 on which a plurality of LEDs 4 are soldered. The aluminum-based circuit board 5 is fastened within the light source housing 16. The light source housing 16 is provided with three through holes uniformly distributed. It will be understood that the present invention is not limited to aluminum-based circuit boards, and other circuit boards may be employed depending on the use environment and functional requirements. The number in the embodiment is merely an example, and a plurality of them may be selected according to actual conditions, and are not limited to three.

The aluminum-based circuit board 5 is also provided with three connecting posts 17, and the arc (120 degrees) is evenly distributed on the circular aluminum-based circuit board 5. One end of the connecting post 17 (the left end in Fig. 1) extends from the surface of the aluminum-based circuit board 5 toward the lens holder 3; the other end (the right end in Fig. 1) extends from the other surface of the aluminum-based circuit board 5 toward the lever connecting plate 6. One end of the connecting post 17 has a thread for mating with the lock nut 7, and the other end has a hook for hooking with the lever connecting plate 6.

As shown in Figs. 1 to 3, the lens assembly includes a lens 1 corresponding to a plurality of LEDs 4, a lens platen 2, and a lens holder 3. The lens holder 3 has a plurality of grooves one-to-one corresponding to the LED 4 and the lens 1, and a through hole through which the connecting post 17 is passed. The hole position on the lens platen 2 corresponds to the hole position on the lens holder, and corresponds to the LED soldered on the aluminum-based circuit board. The lens 1 is fixed in the groove of the lens holder 3 through the lens platen 2. The lens platen 2 is fastened to the lens holder 3 by the lock nut 7, so that the lens 1, the lens platen 2 and the lens holder 3 are integrated to ensure that each of the LEDs 4 corresponds to one lens 1, and the light emitted by the LED 4 Can be projected forward to the center of the lens 1. In addition, instead of the aforementioned three-piece lens assembly, the lens assembly may also be a two-piece lens module including a lens holder (corresponding to the lens platen 2 and the lens holder 3) and a plurality of lenses 1 distributed on the lens holder. The position of the lens 1 in the lens module corresponds to a plurality of LEDs 4 in the light source assembly.

Referring to Figures 1, 6 and 7, the lever link comprises a lever link 6 and three identically shaped levers 9 of approximately triangular plates. The lever connecting plate 6 has a three-bladed substrate uniformly distributed in the same plane, and a bent portion that is vertically connected to each of the blades. When mounted on the motor shaft, the substrate is perpendicular to the motor shaft and the three bends are parallel to the motor shaft axis. Each of the bent portions is provided with a lever connecting hole 18, a lever The connecting hole 18 is a through hole for connecting the lever 9. Since the substrates are evenly distributed, the levers 9 mounted on the bent portions are also evenly distributed, so that the three levers 9 can be made to have the same force and the same deformation. A guide post connecting hole 19 is also formed in a substrate of the lever connecting plate 6 to cooperate with the guide post 15.

The lever 9 has a triangular plate shape including three end points at the three corners of the triangular plate. The first end point (point a) is provided with a hole for screwing connection with the lever connecting hole 18 of the lever connecting plate 6 to realize a relatively rotatable connection between the lever 9 and the lever connecting plate 6. The second end point (point b) is elastically coupled to the lens assembly in a relatively rotatable manner (described later in detail); the fulcrum (point c) is a fulcrum projecting outward from the edge of the triangular plate as a connecting portion, and the light source housing 16 The side away from the lens assembly abuts and can slide relative to each other. At the second end point (point b) of each of the lever connecting plates 6, BP, a connecting hole is formed in the radial direction of the motor shaft and away from the motor shaft. The distance from the fulcrum to the light source housing 16 is less than the distance from the first end point and the second end point to the light source housing 16. It can be understood that the lever 9 and the lever connecting plate 6 can be connected by a separate screw (rotating shaft), or can be matched with the lever connecting hole 18 by providing an outward protrusion on the first end a of the lever 9 to realize the lever. The first end point a of the 9 is rotatable within the lever connecting hole 18.

The three fulcrums in this embodiment are connected as a connecting portion to one side of the light source assembly, and all three fulcrums are located on the same plane. The three second end points in this embodiment serve as a mating portion through the connecting post 17 and the lens assembly. Connected, all three second endpoints are located in another plane.

Specifically, the point c of the fulcrum serves as a connection portion that interferes with one side (the right side in FIG. 1) of the light source housing 16, and always maintains the connection portion in the same plane during the axial movement, thereby supporting the light source assembly. And the smoothness of the lens assembly during the movement, that is, the axial movement relative to the motor shaft without deflection. This ensures that the distance between all of the LEDs 4 and the lens 1 is equal, and the uniformity of the emitted light is not affected by the movement of the light source assembly or the lens assembly.

As previously mentioned, the first end of the lever 9 is rotatably coupled to the lever link 6 with its relative rotational direction being perpendicular to the motor shaft. Taking the lowermost lever 9 in Fig. 1 as an example, the relative rotation direction of the first end point a and the lever connecting plate 6 is perpendicular to the plane of the paper (i.e., perpendicular to the motor shaft direction). In addition, the a end of the lever 9 and the lever connecting plate 6 can be connected in a relatively rotatable manner by screwing, movable riveting, sleeve and shaft connection.

As shown in FIG. 4, the second end point b of the lever 9 is elastically coupled to the lens holder 3 and the lens platen 2 via a connecting post 17 fixed to the aluminum-based circuit board 5. The connecting post 17 passes through the through hole in the lens holder 3 and the through hole in the lens pressing plate 2, and protrudes to the outside of the side of the lens pressing plate 2 remote from the lens holder 3. The coupling post 17 connects the lens holder 3 and the lens platen 2 together by the cooperation of the lock nut 7 and the connecting post 17. Further, at a portion between the aluminum-based circuit board 5 and the lens holder 3, a positioning post 10 is axially disposed, and a spring 8 is disposed around the positioning post 10. The positioning post 10 extends through the lens holder 3 and the lens platen 2 to cooperate with the lock nut 7. The spring 8 is interposed between the aluminum-based circuit board 5 and the lens holder 3 with a certain pre-pressure so that pressure can be applied to the aluminum-based circuit board 5 and the lens holder 3. One end of the connecting post 17 extends toward the light source housing 16 to a hollow region in the middle of the positioning post 10 (as shown in FIG. 4), and is connected to the lock nut 7 through the positioning post 10. The other end of the connecting post 17, the hook portion, is hooked into the connecting hole of the second end point b of the lever connecting plate 6 through a through hole provided in the light source housing 16. By hooking, when the lens assembly is moved axially along the motor shaft, the lever link plate 6 can be rotated relative to the connecting post 17 in a plane containing the axial direction of the motor shaft. The second end point b of the lever 9 is rotatably coupled to the connecting post 17, and its relative rotational direction is perpendicular to the motor shaft, which is the same as the relative rotational direction of the first end of the lever 9 and the lever connecting plate 6 (ie, 1 in the direction perpendicular to the paper). Taking the lowermost lever 9 in Fig. 1 as an example, the relative rotational direction of the second end point b of the lever 9 and the connecting post 17 is perpendicular to the plane of the paper. It can be understood that the manner of hooking can also be replaced by movable riveting, etc., as long as the lever connecting plate 6 can be ensured that the connecting post 17 can be advanced in the axial direction of the motor shaft through the rotatable connection with the connecting post 17. The force of retreat.

The fulcrum point c of the lever 9 is slidably contacted with the bottom surface of the light source housing 16. The point c protrudes from the ends a and b to be large enough so that the point of the fulcrum c interferes with the bottom surface of the light source housing 16 throughout the rotation of the lever 9 in a plane containing the axial direction of the motor shaft, and is always It is closer to the bottom surface of the light source housing 16 than the other portions of the lever 9.

In addition, the distance from the a end to the point c of the fulcrum is greater than the distance from the b end to the c point of the fulcrum. As shown in Fig. 1, the ratio of the distance from the a end of the lever 9 to the point c of the fulcrum and the distance from the b end to the c point of the fulcrum is between 6 and 7 times. When the a end of the lever 9 is moved a large distance, the b end moves a small distance, which is only about 1/6 of the former, thereby achieving the purpose of finely adjusting the movement of the lens assembly.

As shown in Figs. 1 and 6, the motor drive unit includes a motor 13, a motor bracket 14 and a motor lands 11. The motor 13 is fixed to the light source housing 16 via the motor bracket 14. The motor shaft 12 with external threads in the motor 13 is screwed to the motor lands 1 1 with internal threads to convert the rotation of the motor shaft of the motor 13 into the axial movement of the motor lands 11.

Figures 6 and 7 show the structure of the lever connecting plate 6 and its connection with the motor drive unit. The projections on the motor connecting plate 11 pass through the positioning holes 20 of the lever connecting plate 6, and are fastened with screws to the threaded holes 21 of the motor connecting plate, thereby fixing the motor connecting plate 11 and the lever connecting plate 6 together. When the motor 13 is rotated, the motor lands 1 1 are driven by the motor shaft to move in the forward and backward directions (axial movement) in the axial direction of the motor shaft, and the lever connecting plate fixed to the motor lands 11 is pushed or pulled. 6 Perform the same direction of motion.

At the same time, the cylindrical guide post 15 is axially disposed, one end of which is fixed to the motor bracket 14 and the other end is fixed by the guide post connecting hole 19 on the lever connecting plate 6. When the lever connecting plate 6 is axially moved by the motor connecting plate 11, the guiding post 15 can restrict the rotational movement of the lever connecting plate 6 along the motor rotating shaft to ensure that the lever connecting plate 6 is reliably axially along the motor rotating shaft. Exercise without rotating. Further, since the motor lands 11 and the lever connecting plate 6 are fixed together, the guide post 15 can also restrict the motor lands 11 from moving only axially when the motor shaft 12 rotates. As the motor 13 rotates, the motor shaft 12 is also rotated, causing the motor lands 11 that are screwed to the motor shaft 12 to move axially. The lever connecting plate 6 fixed to the motor connecting plate 1 1 performs the same axial movement correspondingly, and the first end point (a end) of the lever 9 screwed to the lever connecting plate 6 is axially moved, and the lever is simultaneously The fulcrum of the 9 (c end) also slides along the side of the light source housing 16 in the radial direction of the motor shaft. The lever 9 moves with the fulcrum (c end) as a fulcrum, and the first end point and the second end point move in opposite directions. Specifically, when the first end (a end) of the motor lands 1 1 , the lever connecting plate 6 and the lever 9 are advanced toward the left side of FIG. 1 , the second end (b end) of the lever 9 is in the opposite direction, The right side of Figure 1 is moving. When the second end point (b end) of the lever 9 is moved to the right side of Fig. 1, the pulling force to the right side of Fig. 1 is applied to the lens assembly through the connecting post 17 hooked to the second end point and connected to the lens assembly. At this time, the lens assembly applies pressure to the spring 8, and the spring 8 compresses. The lens assembly moves in a direction opposite to the direction in which the motor lands 1 1 and the lever connecting plate 6 move.

On the other hand, when the first end (a end) of the motor lands 1 1 , the lever connecting plate 6 and the lever 9 are advanced toward the right side of FIG. 1, the second end (b end) of the lever 9 is directed to FIG. Left side movement. The connecting post 17 no longer applies pressure to the lens assembly. The spring releases the lens assembly, and under the elastic force of the spring 8, the lens assembly is applied to the force on the left side of Fig. 1. In this way, the movement of the lens assembly in the left and right directions is realized, so that the distance with respect to the light source 4 is changed, and the focusing function is realized.

During the axial movement of the motor lands 1 1 and the lever connecting plate 6, the guide post 15 functions to prevent the motor lands from rotating and converting into axial movement.

The joints (three fulcrums) on the lever 9 for connection with the light source assembly are located in the same plane and are evenly distributed in the plane. The mating portions (three second end points) on the lever 9 for connection with the lens assembly are located on the other plane and are evenly distributed in the plane. Based on the above structural features, when the lever connecting plate 6 is moved in the axial direction, the three end points of the connecting portion can always maintain the same movement, thereby ensuring that the light source assembly is always in a plane perpendicular to the axial direction of the motor shaft, and there is no relative axis. The skew of the direction. Similarly, when the lever connecting plate 6 is moved in the axial direction, the three end points of the engaging portion can also always have the same movement, thereby ensuring that the lens assembly is always in the plane perpendicular to the axial direction of the motor shaft, without the relative axial direction. Skew.

As shown in the above structure, when focusing is required, the motor 13 rotates forward or reverse to drive the motor shaft 12 to rotate, so that the motor connecting plate 11 moves with the lever connecting plate 6 in the axial direction of the motor shaft 12; 6 to move the a end of the lever 9; the principle of the lever moves the b end of the lever 9 in a direction opposite to the direction of movement of the a end, and causes the connecting post 17 to move in the same axial direction as the direction of the b end, thereby also making the lens The components move in the same direction. The lever 9 fulcrum c acts on the bottom surface of the light source housing 16. When the a end of the lever 9 moves a large distance, the b end outside the fulcrum c moves a small distance, which is only about 1 / 6 of the former, thereby achieving fine adjustment. The purpose of the displacement of the lens assembly.

During the focusing process, the lens assembly can be moved by the lever 9 by the three-point positioning, and the three connecting posts 17 move along the axial direction without tilting or deformation, thereby achieving focusing. Consistent The property is better, and the focusing structure is more stable. In addition, the lever 9 drives the lens assembly to move axially relative to the light source assembly through the connecting post 17. The pair of oppositely applied forces applied to the lens assembly by the connecting post 17 and the spring 8 ensure that the distance between the LED 4 in the light source assembly and the lens 1 corresponding to the LED 4 is consistent during the focusing process, that is, The consistency of the focus.

It can be seen that in the present embodiment, the principle of the three-point support plane is utilized, and the three levers 9 are used to keep the lens assembly and the light source assembly stable during the movement, without the axial deflection of the motor shaft. Moreover, a pair of opposing forces applied to the lens assembly by the spring 8 and the connecting post 17 results in a smoother movement of the lens assembly relative to the axial direction of the light source assembly.

The focusing mechanism realizes the smooth fine focusing of the high-power LED spotlight, ensures the uniformity of the spot illuminated by each LED4, has good light effect and high brightness, and is suitable for the manufacture of high-power LED film and television lamps.

The above embodiments illustrate the preferred embodiments of the present invention in detail, and are not intended to limit the present invention. For example, the number of levers and the shape of the lever can be adjusted according to the size of the LED surface light source. Any obvious changes made to the invention without departing from the spirit of the invention will constitute an infringement of the patent right of the present invention and will bear corresponding legal liabilities.

Claims

Rights request

What is claimed is: 1. An LED spotlight focusing mechanism comprising a light source housing, a light source assembly and a lens assembly located in the light source housing, and a motor driving device located outside the light source housing and having a motor shaft, wherein:

The LED spotlight focusing mechanism further includes a lever connector located outside the light source housing, wherein the lens assembly, the light source assembly, the lever connecting member and the motor driving device are sequentially along the motor driving device The motor shaft is axially distributed, the motor driving device is connected to the lever connecting member, the lever connecting member has at least three connecting portions connected to one side of the light source housing, and at least three and a mating portion of the lens assembly, the connecting portion of the lever connecting member is located in a same plane perpendicular to the axial direction and uniformly distributed in the same plane, and the mating portion is located in another plane perpendicular to the axial direction And evenly distributed in the other plane;

The lever connector includes a lever connecting plate and at least three levers of the same shape, and the lever is evenly distributed on the lever connecting plate centered on the axis;

The lever includes a first end point, a second end point, and a fulcrum, the first end point is coupled to the lever connecting plate; the second end point is coupled to the lens assembly as the mating portion; As the connecting portion, in contact with the surface of the light source housing;

The first end point, the second end point, and a fulcrum are distributed in a triangle, and a distance from the fulcrum to the light source housing is smaller than a distance between the first end point and the second end point to the light source housing. The distance from the first end point to the fulcrum is greater than the distance from the second end point to the fulcrum;

The fulcrum is slidably coupled to a side of the light source housing remote from the lens assembly; the first end point is rotatably coupled to the lever connecting plate, and the first end point is The relative rotational direction of the lever connecting plate is perpendicular to the motor shaft; the second end point is rotatable relative to the lens assembly, and the direction of rotation is perpendicular to the motor shaft;

The lever is a triangular plate, and the first end point, the second end point and the fulcrum are respectively located at three corners of the triangular plate, and the first end point is opened for the lever and the a hole in which the lever connecting plates are rotatably coupled together; the second end is provided with a hole for connecting the lever and the lens assembly, the fulcrum protruding from the corner to the light source housing ;

The lever connecting plate has a substrate of at least three blades uniformly distributed in the same plane, and an equal number of bent portions corresponding to the blades, the bent portions being vertically connected to the corresponding one of the blades and parallel In the axial direction of the motor shaft, a lever connecting hole for connecting the first end of the lever is opened on the bent portion.

2. An LED spotlight focusing mechanism, comprising a light source housing, a light source assembly and a lens assembly located in the light source housing, and a motor driving device located outside the light source housing and having a motor shaft, wherein:

The LED spotlight focusing mechanism further includes a lever connector located outside the light source housing, wherein the lens assembly, the light source assembly, the lever connecting member and the motor driving device sequentially follow the motor a motor shaft axially distributed in the driving device, the motor driving device being connected to the lever connecting member, the lever connecting member having at least three connecting portions connected to one side of the light source housing, and at least three a mating portion connected to the lens assembly, the connecting portion of the lever connecting member is located in a same plane perpendicular to the axial direction and uniformly distributed in the same plane, and the mating portion is located perpendicular to the axial direction The other plane is evenly distributed in the other plane.

3. The LED spotlight focusing mechanism according to claim 2, wherein:

The lever connector includes a lever connecting plate and at least three levers of the same shape, the lever being evenly distributed on the lever connecting plate centered on the axis,

The lever includes a first end point, a second end point, and a fulcrum, the first end point is coupled to the lever connecting plate; the second end point is coupled to the lens assembly as the mating portion; The connecting portion is in contact with the surface of the light source housing.

4. The LED spotlight focusing mechanism according to claim 3, wherein:

The first end point, the second end point and a fulcrum are distributed in a triangle, and the distance from the fulcrum to the light source housing is smaller than the distance between the first end point and the second end point to the light source housing.

5. The LED spotlight focusing mechanism according to claim 3, wherein:

The fulcrum is slidably coupled to a side of the light source housing remote from the lens assembly.

6. The LED spotlight focusing mechanism according to claim 3, wherein:

The first end point is rotatably coupled to the lever connecting plate, and a relative rotational direction of the first end point and the lever connecting plate is perpendicular to the motor shaft.

7. The LED spotlight focusing mechanism according to claim 6, wherein:

The second end point rotates relative to the lens assembly and the direction of rotation is perpendicular to the motor shaft.

8. The LED spotlight focusing mechanism according to claim 3, wherein:

The distance from the first end point to the fulcrum is greater than the distance from the second end point to the fulcrum.

9. The LED spotlight focusing mechanism according to claim 3, wherein:

The lever is a triangular plate, and the first end point, the second end point and the fulcrum are respectively located at three corners of the triangular plate, and the first end point is opened for the lever and the a hole in which the lever connecting plates are rotatably coupled together; the second end is provided with a hole for connecting the lever and the lens assembly, the fulcrum protruding from the corner to the light source housing .

10. The LED spotlight focusing mechanism according to claim 3, wherein:

1 1. The LED spotlight focusing mechanism according to claim 3, wherein:

The LED spotlight focusing mechanism further includes a connecting post, the connecting post connecting the second end of the lever Point and the lens assembly.

12. The LED spotlight focusing mechanism according to claim 11, wherein:

Between the light source assembly and the lens assembly, a spring and a positioning post having the same number as the connecting post are further included; the spring is sleeved on the periphery of the positioning post, and one end of the spring is pressed against the light source On the assembly, the other end is pressed against the lens assembly.

13. The LED spotlight focusing mechanism according to claim 12, wherein:

The LED spotlight focusing mechanism further includes a lock nut that passes through the positioning post and the lens assembly and is coupled to the lock nut.

14. The LED spotlight focusing mechanism according to claim 3, wherein:

The motor driving device includes a motor, a motor bracket and a motor connecting plate, wherein the motor is fixed to the light source housing through the motor bracket, and a motor shaft of the motor is screwed to the motor connecting disc, the motor The connecting plate is fixed to the lever connecting plate, and the motor connecting plate and the lever connecting plate are sleeved on the motor shaft.

15. The LED spotlight focusing mechanism according to claim 14, wherein:

The LED spotlight focusing mechanism further includes a guide post disposed axially along the motor shaft, one end of the guide post being fixed to the motor bracket, and the other end being fixed to the lever connecting plate.

An LED spotlight characterized by having the LED spotlight focusing mechanism according to any one of claims 1 to 15.