Focusing device and lighting equipment

Abstract

The utility model provides a focusing device and lighting equipment, the lighting equipment comprises a light source, a lens assembly and the focusing device, the lens assembly and the light source are arranged in a spaced mode in the first direction, and the focusing device is connected with the lens assembly and used for adjusting the position of the lens assembly in the first direction. The focusing device comprises: an electric driving member; the input end of the connecting rod mechanism is connected with the output end of the electric driving part, and the output end of the connecting rod mechanism is used for being connected with a lens assembly; the connecting rod mechanism is used for driving the lens assembly to slide linearly under the driving of the electric driving piece so as to adjust the distance between the lens assembly and the light source. Through the arrangement of the electric driving part and the connecting rod mechanism, the focusing difficulty can be reduced, the focusing efficiency can be improved, and the occupied space is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of lighting, and more specifically, relates to a focusing device and a lighting device. Background Art

[0002] During the production of film and television dramas, advertisements, and videos, lighting equipment is required for lighting. Based on different usage scenarios, it is necessary to adjust the light spot and illuminance of the light, that is, to focus. When the lighting equipment is hoisted, manual focusing is very inconvenient. In the existing market, there is already a solution in which a motor drives a lens to move through a lead screw to achieve focusing. Although it can improve the convenience of focusing, the focusing structure is complex, occupies a large space, and due to the setting of the lead screw, the focusing action is not smooth enough, affecting the adjustment efficiency. Summary of the Utility Model

[0003] The purpose of the embodiments of this application is to provide a focusing device and a lighting device to solve the technical problem of low focusing efficiency of the focusing device in the existing lighting equipment.

[0004] To achieve the above object, the technical solution adopted in this application is: to provide a focusing device, including:

[0005] An electric drive member;

[0006] A linkage mechanism, the input end of the linkage mechanism is connected to the output end of the electric drive member, and the output end of the linkage mechanism is used to be connected to the lens assembly;

[0007] The linkage mechanism is used to drive the lens assembly to slide linearly under the drive of the electric drive member to adjust the distance between the lens assembly and the light source.

[0008] In one embodiment, the linkage mechanism includes:

[0009] A first link, the first link has a first end and a second end arranged oppositely, and the first link can be driven by the electric drive member to rotate and swing around the first end;

[0010] A second link, the second link has a third end and a fourth end arranged oppositely, the third end of the second link is hinged to the second end of the first link, and the fourth end of the second link is used to be hinged to the lens assembly.

[0011] In one embodiment, the linkage mechanism further includes:

[0012] A first guiding member, the first guiding member is hinged to the fourth end of the second link, and the first guiding member is arranged to be fixedly connected to the lens assembly;

[0013] A second guiding member, which is fixed relative to the light source and is slidably connected to the first guiding member to guide the linear movement of the first guiding member.

[0014] In one embodiment, the link mechanism further includes a slider, which is hinged to the fourth end of the second link;

[0015] The slider is fixedly connected to the first guiding member;

[0016] Alternatively, the slider is integrally connected to the first guiding member.

[0017] In one embodiment, the electric driving member is used to output a rotational motion, and a third link is connected between the electric driving member and the first link. One end of the third link is fixedly connected to the output end of the electric driving member, and the other end of the third link is slidably disposed in the first link.

[0018] In one embodiment, the first link is formed with a guiding groove extending along its length direction, the third link is convexly provided with a guiding post, and the guiding post is slidably disposed in the guiding groove and can rotate in the guiding groove.

[0019] In one embodiment, the output end of the electric driving member is fixedly connected to the first end of the first link;

[0020] Alternatively, the electric driving member is used to output a linear motion, and the output end of the electric driving member is hinged to the first link.

[0021] In one embodiment, the focusing device includes multiple groups of link mechanisms and at least one of the electric driving members. At least one of the electric driving members is used to drive the link mechanisms to move synchronously, and the output ends of the link mechanisms are respectively connected to different circumferential positions of the lens assembly.

[0022] In one embodiment, the focusing device further includes a connecting member, and the connecting member is connected between two relatively arranged first links;

[0023] And / or, the connecting member is connected between two relatively arranged second links.

[0024] On the other hand, the present application further provides an illumination device, including a light source, a lens assembly and the above-mentioned focusing device. The lens assembly is spaced from the light source in a first direction. The focusing device is connected to the lens assembly and is used to adjust the position of the lens assembly in the first direction.

[0025] The beneficial effects of the focusing device and the lighting device provided by this application are as follows: The electric driving member drives the linkage mechanism to drive the lens assembly to slide linearly, so as to adjust the distance between the lens assembly and the light source, thereby achieving focusing. Among them, since the electric driving member is a driving member that can be electrically controlled, the focusing device can realize electric adjustment, reducing the difficulty of focusing. In addition, the motion is transmitted through the linkage mechanism. The linkages in the linkage mechanism are all simply connected, and the motion transmission between the linkages is smooth, so that the focusing is smooth and the focusing effect is improved. In addition, the linkage mechanism is composed of linkages, with a simple structure and small space occupation. Brief Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 It is a schematic side view of some structures in the lighting device provided by the embodiment of this application, parallel to the axial direction of the lens assembly;

[0028] Figure 2 It is a schematic side view of the focusing device provided by the embodiment of this application, parallel to the axial direction of the lens assembly;

[0029] Figure 3 It is a schematic three-dimensional structure view of the lens assembly and the focusing device in the lighting device provided by the embodiment of this application;

[0030] Figure 4 It is a schematic side view perpendicular to the axial direction of the lens assembly of the lens assembly and the focusing device in the lighting device provided by the embodiment of this application;

[0031] Figure 5 It is an assembly schematic diagram of the lens assembly, the first guiding member and the second guiding member in the lighting device provided by another embodiment of this application;

[0032] Figure 6 It is a schematic side view of the focusing device in the lighting device provided by another embodiment of this application.

[0033] Among them, the reference numerals in the drawings are as follows:

[0034] 100. Focusing device; 110. Electric driving member; 120. Linkage mechanism; 121. First link; 1211. First end; 1212. Second end; 1213. Guide groove; 122. Second link; 1221. Third end; 1222. Fourth end; 123. Hinge seat; 124. First guiding member; 125. Second guiding member; 1251. Guide hole; 126. Slider; 130. Third link; 131. Fifth end; 132. Sixth end; 133. Guide post; 140. Connecting member; 150. Connecting rod; 200. Light source; 300. Lens assembly; 310. Lens; 320. Lens bracket; X. First direction. Detailed implementation manners

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following further details this application in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0037] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0039] Please refer to Figure 1, embodiments of the present application provide an illumination device, including a light source 200, a lens assembly 300, and a focusing device 100. The light source 200 and the lens assembly 300 are arranged at an interval along a first direction X. The focusing device 100 is connected to the lens assembly 300. The focusing device 100 is used to adjust the distance of the lens assembly 300 along the first direction X to adjust the distance between the lens assembly 300 and the light source 200, thereby achieving focusing.

[0040] Among them, the lens assembly 300 may include a Fresnel lens or a common lens.

[0041] Optionally, the lens assembly 300 may include one lens 310 or multiple lenses 310.

[0042] Optionally, the lens assembly 300 may further include a lens bracket 320. The lens 310 is installed and supported through the lens bracket 320, and a connection between the lens 310 and the focusing device 100 is formed through the lens bracket 320, that is, the lens bracket 320 is connected to the focusing device 100.

[0043] Please refer to Figures 1 to 3 , and now the focusing device 100 provided by the embodiments of the present application will be described.

[0044] The focusing device 100 includes an electric driving member 110 and a link mechanism 120. The input end of the link mechanism 120 is connected to the output end of the electric driving member 110, and the output end of the link mechanism 120 is used to be connected to the lens assembly 300; the link mechanism 120 is used to drive the lens assembly 300 to slide linearly under the drive of the electric driving member 110 to adjust the distance between the lens assembly 300 and the light source 200.

[0045] Regarding the electric driving member 110, it should be noted that the electric driving member 110 is a driving structure that can be electrically controlled, such as an electric motor, a cylinder, or an electric push rod, etc.

[0046] The input end of the link mechanism 120 is connected to the output end of the electric driving member 110. It may be that the input end of the link mechanism 120 is directly connected to the output end of the electric driving member 110, or a connection may be formed between the input end of the link mechanism 120 and the output end of the electric driving member 110 through other structures.

[0047] The link mechanism 120 can output a linear motion under the drive of the electric driving member 110. This linear motion is the linear motion in the above-mentioned first direction X, that is, the linear motion in the direction in which the lens assembly 300 and the light source 200 are spaced apart, so as to adjust the distance between the lens assembly 300 and the light source 200.

[0048] In the focusing device 100 according to the embodiment of the present application, the electric driving member 110 drives the link mechanism 120 to drive the lens assembly 300 to slide linearly, so as to adjust the distance between the lens assembly 300 and the light source 200, thereby realizing focusing. Among them, since the electric driving member 110 is a driving member that can be electrically controlled, the focusing device 100 can realize electric adjustment, reducing the focusing difficulty. In addition, the motion is transmitted through the link mechanism 120, and the connection between the links in the link mechanism 120 is simple, and the motion transmission between the links is smooth, so that the focusing is smooth and the focusing effect is improved. In addition, the link mechanism 120 is composed of links, with a simple structure and small occupied space.

[0049] In one embodiment, please refer to Figure 1 and Figure 2 , the link mechanism 120 includes a first link 121 and a second link 122. The first link 121 has a first end 1211 and a second end 1212 which are oppositely arranged. The first link 121 can be driven by the electric driving member 110 to rotate and swing around the first end 1211; the second link 122 has a third end 1221 and a fourth end 1222 which are oppositely arranged. The third end 1221 of the second link 122 is hinged to the second end 1212 of the first link 121, and the fourth end 1222 of the second link 122 is used for hinging with the lens assembly 300.

[0050] Among them, the third end 1221 of the second link 122 is hinged to the second end 1212 of the first link 121 through a pin shaft.

[0051] The fourth end 1222 of the second link 122 can be directly hinged to the lens assembly 300, or can be hinged to the lens assembly 300 through other structures.

[0052] When the electric driving member 110 drives the first link 121 to rotate, the first link 121 rotates around the first end 1211. As the first link 121 rotates, the second end 1212 of the first link 121 makes a circular motion, thereby driving the third end 1221 of the second link 122 to make a circular motion, and further driving the fourth end 1222 of the second link 122 to make a linear motion, so as to drive the lens assembly 300 to make a linear motion.

[0053] In one embodiment, please refer to Figure 1 and Figure 2 , a hinge seat 123 can be set. The position of the hinge seat 123 is fixed relative to the light source 200. For example, the hinge seat 123 is fixed on the housing bracket of the entire lighting device. The first end 1211 of the first link 121 is hinged to the hinge seat 123, so that when the first link 121 is driven to rotate, it can rotate around the first end 1211.

[0054] In one embodiment, please refer toFigures 1 to 3 The focusing device 100 also includes a first guide member 124 and a second guide member 125. The first guide member 124 is hinged to the fourth end 1222 of the second connecting rod 122, and the first guide member 124 is configured to be fixedly connected to the lens assembly 300; the position of the second guide member 125 is fixed relative to the light source 200, and the second guide member 125 is slidably connected to the first guide member 124 to guide the linear movement of the first guide member 124.

[0055] It should be noted that the first guide member 124 is hinged to the fourth end 1222 of the second connecting rod 122. The first guide member 124 and the fourth end 1222 of the second connecting rod 122 may be hinged directly or through other structures.

[0056] Regarding the fixed connection between the first guide member 124 and the lens assembly 300, the fixed connection refers to a connection method that allows the first guide member 124 and the lens assembly 300 to always remain relatively fixed without being disassembled and separated from each other, and does not produce relative movement, so that the first guide member 124 can drive the lens assembly 300 to move linearly. Specifically, the fixed connection can be screw locking, welding, interference fit connection, adhesive connection, etc.

[0057] In addition, the position of the second guide member 125 is fixed relative to the light source 200, which means that during the transportation of the lighting device or during the focusing process of the focusing device 100, the position of the second guide member 125 is always relatively fixed to the position of the light source 200. When the first guide member 124 slides under the drive of the second connecting rod 122, it can drive the lens assembly 300 to move linearly relative to the light source 200, thereby achieving focusing. At the same time, due to the guiding effect of the first guide member 124 and the second guide member 125, it is ensured that the lens assembly 300 can slide along a straight line and slide smoothly.

[0058] In one embodiment, see Figure 3 The first guide member 124 is in the shape of a long rod, and one end of the first guide member 124 is fixedly connected to the lens assembly 300. The second guide member 125 has a guide hole 1251, and the first guide member 124 is slidably arranged in the guide hole 1251, thereby forming a sliding guide connection between the first guide member 124 and the second guide member 125. It can be understood that in other embodiments of the present application, please refer to Figure 5 Alternatively, the guide hole 1251 may be formed on the first guide member 124 , and then one end of the second guide member 125 may be slidably inserted into the guide hole 1251 . Similarly, the sliding of the first guide member 124 may be guided by the second guide member 125 .

[0059] In one embodiment, see Figure 3, the number of the second guiding members 125 is two. The two second guiding members 125 are arranged at intervals along the axial direction of the first guiding member 124, and the two second guiding members 125 are symmetrically located on both sides of the connection between the first guiding member 124 and the second connecting rod 122, so as to ensure the smooth sliding of the first guiding member 124.

[0060] In one embodiment, the second guiding member 125 is a bearing, and the two bearings are respectively used to support the relative two ends of the first guiding member 124, so as to ensure the smooth sliding of the first guiding member 124. It can be understood that in other embodiments of the present application, the above-mentioned second guiding member 125 may not be a bearing, but a common support block with a guiding hole 1251, which is not uniquely limited here.

[0061] In one embodiment, please refer to Figures 1 to 3 , the linkage mechanism 120 further includes a slider 126. The slider 126 is hinged to the fourth end 1222 of the second connecting rod 122, and the slider 126 is integrally connected to the first guiding member 124. In this embodiment, by arranging the slider 126 between the first guiding member 124 and the second connecting rod 122, the hinge between the first guiding member 124 and the second connecting rod 122 is realized through the slider 126, which can improve the hinge stability between the first guiding member 124 and the second connecting rod 122.

[0062] Specifically, the slider 126 is in a block structure, and the surface of the slider 126 in contact with the second connecting rod 122 is a plane, so as to be able to guide the swing of the fourth end 1222 of the second connecting rod 122 to ensure the hinge stability between the second connecting rod 122 and the slider 126.

[0063] Optionally, the slider 126 is the middle part of the first guiding member 124 along the axial direction, and the slider 126 is integrally formed with the first guiding member 124. It can be understood that in other embodiments of the present application, the slider 126 can also be fixedly connected to the first guiding member 124. For example, the slider 126 and the first guiding member 124 can be fixed by screwing or interference socketing.

[0064] In another embodiment of the present application, please refer to Figure 6 , there are two groups of first connecting rods 121 and second connecting rods 122 distributed along the first direction X on the first guiding member 124. The two first connecting rods 121 are arranged in parallel at intervals and are connected by a connecting rod 150. The two second connecting rods 122 are arranged in parallel at intervals. The electric driving member 110 can synchronously drive the two groups of first connecting rods 121 and second connecting rods 122 to drive the first guiding member 124 to slide, so as to ensure the smooth sliding of the first guiding member 124.

[0065] In one embodiment, please refer to Figures 1 to 3, the electric driving member 110 is used to output a rotational motion. A third link 130 is connected between the electric driving member 110 and the first link 121. One end of the third link 130 is fixedly connected to the output end of the electric driving member 110, and the other end of the third link 130 is slidably disposed in the first link 121.

[0066] For the convenience of description, let the opposite ends of the third link 130 be the fifth end 131 and the sixth end 132 respectively. The fifth end 131 of the third link 130 is fixedly connected to the output end of the electric driving member 110, and the sixth end 132 of the third link 130 is slidably disposed in the first link 121. When the electric driving member 110 outputs a rotational motion, it can drive the third link 130 to rotate around the third end 1221, so as to drive the sixth end 132 of the third link 130 to move in a circular trajectory, and further drive the first link 121 to swing around its first end 1211.

[0067] In this embodiment, the rotational motion of the electric driving member 110 is converted into the swinging motion of the first link 121 through the third link 130. That is, the connection positions and respective lengths of the first link 121 and the third link 130 can be designed to satisfy that when the electric driving member 110 rotates one circle, the first link 121 can swing by a preset angle, so that the fourth end 1222 of the second link 122 just realizes a linear reciprocating motion, that is, the lens 310 realizes a linear reciprocating motion, which not only makes the focusing smooth but also improves the focusing efficiency.

[0068] In one embodiment, please refer to Figure 2 , the first link 121 is formed with a guide groove 1213. The guide groove 1213 extends along the length direction of the first link 121. The third link 130 is convexly provided with a guide post 133. The guide post 133 is slidably disposed in the guide groove 1213, and the guide post 133 can rotate in the guide groove 1213.

[0069] Specifically, the guide post 133 is convexly provided at the sixth end 132 of the third link 130. When the third link 130 makes a circular motion driven by the electric driving member 110, the guide post 133 repeatedly slides in the guide groove 1213, thereby pushing the first link 121 to make a reciprocating swinging motion. Specifically, when the guide post 133 is at the bottom end of the guide groove 1213, the first link 121 is in the middle position. When the guide post 133 slides to the top end of the guide groove 1213, it can push the fourth end 1222 of the second link 122 to slide to the leftmost extreme position or the rightmost extreme position.

[0070] In one embodiment, the electric driving member 110 is a stepper motor. Each time the stepper motor rotates one circle, it can drive the first connecting rod 121 to swing reciprocally once, so as to drive the fourth end 1222 of the second connecting rod 122 and the lens assembly 300 to move reciprocally once. At the same time, due to the setting of the stepper motor, the stepper motor is an open-loop control motor that converts an electric pulse signal into an angular displacement or a linear displacement. It has high precision, can divide a circular motion into multiple unit angular motions, and can stay at any unit angle. Each unit angle of the stepper motor corresponds to each unit displacement of the lens assembly 300, so that the lens assembly 300 can stay at the position of any unit displacement, thereby realizing precise adjustment of the position of the lens assembly 300 and ensuring the stability of the position of the lens assembly 300 after each focusing. It can be understood that in other embodiments of the present application, the above electric driving member 110 can also be a rotary cylinder or a servo motor, etc., and is not limited uniquely here.

[0071] In another embodiment of the present application, the output end of the electric driving member 110 can also be fixedly connected to the first end 1211 of the first connecting rod 121 directly, that is, the output end of the electric driving member 110 is fixedly connected to the first end 1211 of the first connecting rod 121, so as to be able to directly drive the first connecting rod 121 to rotate and swing through the electric driving member 110. Specifically, the swing angle of the first connecting rod 121 can be controlled by controlling the swing angle of the electric driving member 110. Among them, the electric driving member 110 can be a stepper motor, a rotary cylinder or a servo motor, etc.

[0072] In yet another embodiment of the present application, the electric driving member 110 is used to output a linear motion, and the output end of the electric driving member 110 is hinged to the first connecting rod 121. Specifically, the output end of the electric driving member 110 is hinged to the position between the two ends of the first connecting rod 121. The output end of the electric driving member 110 extends and retracts linearly, thereby pushing the hinge point of the first connecting rod 121 to move up and down, and further driving the first connecting rod 121 to swing repeatedly. Among them, the electric driving member 110 can be a linear cylinder, a linear motor or an electric push rod, etc.

[0073] In one embodiment, the focusing device 100 includes multiple sets of link mechanisms 120 and at least one electric driving member 110. The at least one electric driving member 110 is used to drive each link mechanism 120 to move synchronously, and the output ends of each link mechanism 120 are respectively connected to different circumferential positions of the lens assembly 300. Among them, through the setting of multiple sets of link mechanisms 120, multiple sets of lens assemblies 300 can be used to push different circumferential positions of the lens assembly 300, so that the lens assembly 300 moves smoothly and the focusing accuracy of the lens assembly 300 is improved.

[0074] Specifically, the linkage mechanism 120 can be two groups, three groups, four groups, five groups, six groups, etc. When the number of the linkage mechanisms 120 is two groups, four groups or six groups, one, two or three electric driving members 110 can be provided, and each electric driving member 110 is used to drive two groups of the linkage mechanisms 120 to move synchronously. Moreover, when multiple electric driving members 110 are provided, the electric driving members 110 are also set to move synchronously, so that the linkage mechanisms 120 driven by the electric driving members 110 also move synchronously. In addition, when the number of the linkage mechanisms 120 is three groups or five groups, one electric driving member 110 can be provided corresponding to each linkage mechanism 120, or two groups or four groups of the electric driving members 110 can be used to drive synchronously.

[0075] In one embodiment, the linkage mechanisms 120 are evenly spaced along the circumferential direction of the lens assembly 300. In this way, the acting forces of the linkage mechanisms 120 on the lens assembly 300 in the circumferential direction are evenly distributed, so that the linear motion of the lens assembly 300 is stable and no rollover phenomenon will occur.

[0076] In one embodiment, please refer to Figure 3 and Figure 4 , the focusing device 100 further includes a connecting member 140, and the connecting member 140 is connected between two first linkages 121 arranged oppositely; and / or, the connecting member 140 is connected between two second linkages 122 arranged oppositely.

[0077] Specifically, one connecting member 140 can be provided, and the connecting member 140 is connected between two first linkages 121 or between two second linkages 122. Or, two connecting members 140 can also be provided, and the two connecting members 140 are respectively connected between two first linkages 121 and between two second linkages 122.

[0078] In this embodiment, by connecting the connecting member 140 between two first linkages 121 and / or two second linkages 122 of two linkage mechanisms 120, the two linkage mechanisms 120 can move synchronously.

[0079] In one embodiment, the electric driving member 110 is connected to the first linkage 121 of one of the linkage mechanisms 120 through a third linkage 130, and the two first linkages 121 arranged oppositely are synchronously connected through the connecting member 140, so that two linkage mechanisms 120 can be driven to move synchronously by the same electric driving member 110.

[0080] Preferably, please refer to Figure 4, the connecting line of the two link mechanisms 120 synchronously driven by the same electric driving member 110 intersects with the center line of the lens assembly 300, that is, the connecting line of the connection points where the two link mechanisms 120 are connected to the lens assembly 300 passes through the center of the lens assembly 300. In this way, it can be ensured that the acting forces of the two link mechanisms 120 on the lens assembly 300 are symmetrically arranged, ensuring the smooth linear movement of the lens assembly 300 and preventing the phenomenon of tipping over due to uneven acting forces.

[0081] Preferably, please refer to Figure 4 , the two link mechanisms 120 are symmetrically distributed, the connecting member 140 is strip-shaped, the length extension direction of the connecting member 140 is perpendicular to the sliding direction of the lens assembly 300, and the opposite ends of the connecting member 140 are respectively connected to the same position of the two first linkages 121, and / or connected to the same position of the two second linkages 122 to ensure the synchronization of the two link mechanisms 120. It can be understood that in other embodiments of the present application, the connecting member 140 can also be set to a non-strip-shaped but bent and extended structure, as long as it is ensured that the opposite ends of the connecting member 140 are respectively connected to the same position of the two first linkages 121, and there is no unique limitation here.

[0082] Optionally, the opposite ends of the connecting member 140 are respectively connected to the first linkage 121 by interference plugging. In other embodiments, they can also be connected by welding or screw locking.

[0083] In one embodiment, please refer to Figure 1 , the lens assembly 300 includes a lens 310 and a lens bracket 320. The lens bracket 320 is annular, the lens bracket 320 is spaced from the light source 200 along the first direction X, and the center line of the lens bracket 320 coincides with the center line of the light source 200. The lens 310 is installed on the side of the lens bracket 320 facing away from the light source 200, and one peripheral edge of the lens 310 is attached to the side of the lens bracket 320 facing away from the light source 200. The two first guiding members 124 are respectively connected to the peripheral edge of the lens bracket 320 facing away from the lens 310.

[0084] Specifically, the end of the first guiding member 124 is attached to the end face of the lens bracket 320, and the first guiding member 124 and the lens bracket 320 are locked together by screws, so as to ensure the connection reliability between the first guiding member 124 and the lens bracket 320 and facilitate disassembly and maintenance. It can be understood that in other embodiments, the first guiding member 124 and the lens bracket 320 can also be connected by interference plugging or welding.

[0085] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A focusing device (100), characterized in that, Comprising: An electric driving member (110); A link mechanism (120), an input end of the link mechanism (120) is connected to an output end of the electric driving member (110), and an output end of the link mechanism (120) is for connecting with a lens assembly (300); The link mechanism (120) is configured to drive the lens assembly (300) to slide linearly under the drive of the electric driving member (110) so as to adjust a distance between the lens assembly (300) and a light source (200); The link mechanism (120) includes: A first link (121), the first link (121) has a first end (1211) and a second end (1212) which are oppositely arranged, and the first link (121) can be driven by the electric driving member (110) to rotate and swing around the first end (1211); A second link (122), the second link (122) has a third end (1221) and a fourth end (1222) which are oppositely arranged, the third end (1221) of the second link (122) is hinged to the second end (1212) of the first link (121), and the fourth end (1222) of the second link (122) is for being hinged to the lens assembly (300).

2. The focusing device (100) according to claim 1, wherein The link mechanism (120) further includes: A first guiding member (124), the first guiding member (124) is hinged to the fourth end (1222) of the second link (122), and the first guiding member (124) is arranged to be fixedly connected to the lens assembly (300); A second guiding member (125), the second guiding member (125) is fixed relative to the light source (200), and the second guiding member (125) is slidably connected to the first guiding member (124) to guide a linear movement of the first guiding member (124).

3. The focusing device (100) according to claim 2, characterized in that, The link mechanism (120) further includes a slider (126), the slider (126) is hinged to the fourth end (1222) of the second link (122); The slider (126) is fixedly connected to the first guiding member (124); Or, the slider (126) is integrally connected to the first guiding member (124).

4. The focusing device (100) according to any one of claims 1 to 3, characterized in that, The electric driving member (110) is configured to output a rotational motion, and a third link (130) is connected between the electric driving member (110) and the first link (121), one end of the third link (130) is fixedly connected to the output end of the electric driving member (110), and the other end of the third link (130) is slidably disposed in the first link (121).

5. The focusing device (100) according to claim 4, wherein The first link (121) is formed with a guiding groove (1213) extending along its length direction, the third link (130) is protruded with a guiding post (133), the guiding post (133) is slidably disposed in the guiding groove (1213), and the guiding post (133) can rotate in the guiding groove (1213).

6. The focusing device (100) according to any one of claims 1 to 3, characterized in that, The output end of the electric driving member (110) is fixedly connected to the first end (1211) of the first link (121); Alternatively, the electric drive member (110) is configured to output linear motion, and an output end of the electric drive member (110) is hinged to the first link (121).

7. The focusing device (100) according to any one of claims 1 to 3, characterized in that, The focusing device (100) includes a plurality of link mechanisms (120) and at least one of the electric drive members (110). The at least one electric drive member (110) is configured to drive the link mechanisms (120) to move synchronously, and output ends of the link mechanisms (120) are respectively connected to different circumferential positions of the lens assembly (300).

8. The focusing device (100) according to claim 7, characterized in that, The focusing device (100) further includes a connecting member (140), and the connecting member (140) is connected between two relatively arranged first links (121). And / or, the connecting member (140) is connected between two relatively arranged second links (122).

9. A lighting device, characterized in that, Comprising a light source (200), a lens assembly (300) and a focusing device (100) according to any one of claims 1 to 8, the lens assembly (300) is spaced apart from the light source (200) along a first direction (X), the focusing device (100) is connected to the lens assembly (300) and is configured to adjust the position of the lens assembly (300) in the first direction (X).

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