阅读说明：本技术 调焦装置及照明装置 (Focusing device and lighting device ) 是由 唐荣 彭道友 于 2021-09-26 设计创作，主要内容包括：本申请提供一种调焦装置及照明装置；该调焦装置包括：第一透镜组件、连接架、第一齿轮组件、第二齿轮组件和第三齿轮组件,第一齿轮组件设置于第一透镜组件与连接架之间,第二齿轮组件与第一齿轮组件相互啮合,且与第一透镜组件连接,第三齿轮组件与第一齿轮组件相互啮合,且与连接架连接,第一齿轮组件用于驱动第二齿轮组件和第三齿轮组件以调节第一透镜组件和连接架之间的距离。本申请的调焦装置在调焦过程中,位于第一齿轮组件两侧的各机构的同步伸缩,增大了调焦距离,通过齿轮的配合缓解了大体积调焦装置在调焦过程中的卡顿问题,提高了调焦的流畅性和调焦效率,适用于大尺寸照明设备的调焦处理。(The application provides a focusing device and an illuminating device; the focusing apparatus includes: the first gear assembly is arranged between the first lens assembly and the connecting frame, the second gear assembly is meshed with the first gear assembly and is connected with the first lens assembly, the third gear assembly is meshed with the first gear assembly and is connected with the connecting frame, and the first gear assembly is used for driving the second gear assembly and the third gear assembly to adjust the distance between the first lens assembly and the connecting frame. The focusing device of the application is in the focusing process, synchronous extension and retraction of mechanisms on two sides of the first gear assembly are achieved, the focusing distance is increased, the blocking problem of the large-size focusing device in the focusing process is relieved through cooperation of gears, focusing smoothness and focusing efficiency are improved, and the focusing device is suitable for focusing of large-size lighting equipment.)

1. A focusing device having a light exit side (A), comprising:

a first lens assembly (10) arranged close to the light exit side (A);

a connecting frame (20) arranged on one side of the first lens component (10) far away from the light emergent side (A);

a first gear assembly (30) disposed between the first lens assembly (10) and the connecting frame (20), the first gear assembly (30) including a light-transmitting region (L) communicating with the light-emitting side (A);

a second gear assembly (40) disposed on a side of the first gear assembly (30) facing the light-transmitting region (L) and engaged with the first gear assembly (30), the second gear assembly (40) further connected with the first lens assembly (10); and

a third gear assembly (50) disposed at a side of the first gear assembly (30) facing the light transmission region (L) and engaged with the first gear assembly (30), the third gear assembly (50) further connected with the connecting frame (20), wherein the third gear assembly (50) and the second gear assembly (40) are disposed at intervals along a circumference of the first gear assembly (30), and the first gear assembly (30) is used for driving the second gear assembly (40) and the third gear assembly (50) to adjust a distance between the first lens assembly (10) and the connecting frame (20).

2. The focusing arrangement according to claim 1, wherein the first gear assembly (30) comprises an annular first gear wheel (301), said first gear wheel (301) being an internal gear wheel,

the second gear assembly (40) comprises a second gear (401) and a first transmission rod (402) which is rotationally connected with the second gear (401), one end of the first transmission rod (402) is fixedly connected with the first lens assembly (10), and the second gear (401) is meshed with the first gear (301);

the third gear assembly (50) comprises a third gear (501) and a second transmission rod (502) fixedly connected with the third gear (501), the connecting frame (20) is provided with a transmission part (503), the second transmission rod (502) is rotatably connected with the transmission part, and the third gear (501) is meshed with the first gear (301); the second gear (401) and the third gear (501) are arranged at intervals in the circumferential direction of the first gear (301) and are both external gears.

3. The focusing device according to claim 2, wherein the surface of the second gear (401) contacting the first transmission rod (402) is provided with a first internal thread, the surface of the first transmission rod (402) contacting the second gear (401) is provided with a first external thread, and the first internal thread is matched with the first external thread;

the surface of the transmission part (503) contacting with the second transmission rod (502) is provided with a second internal thread, the surface of the second transmission rod (502) contacting with the transmission part (503) is provided with a second external thread, and the second internal thread is matched with the second external thread;

the first internal thread rotates in a direction opposite to the second internal thread.

4. The focusing apparatus of claim 3, wherein the direction of rotation of the first internal thread and the direction of rotation of the first external thread are both right-handed and the direction of rotation of the second internal thread and the direction of rotation of the second external thread are both left-handed.

5. The focusing device according to claim 2, wherein the first gear assembly (30) further comprises a first limiting frame (302) and a second limiting frame (303) arranged at two opposite sides of the first gear (301), and the first gear (301) is rotatably connected with the first limiting frame (302) and the second limiting frame (303) respectively.

6. The focusing device according to claim 5, characterized in that a first groove is arranged on one side of the first limiting frame (302) facing the first gear (301), a first follower (305) is connected to one side of the first gear (301) facing the first limiting frame (302), and the first follower (305) is arranged in the first groove;

the second limiting frame (303) faces one side of the first gear (301) and is provided with a second groove, one side of the first gear (301) faces the second limiting frame (303) and is connected with a second follower (306), and the second follower (306) is arranged in the second groove.

7. The focusing device according to claim 6, wherein the first follower (305) comprises a bearing, and a bearing surface of the first follower (305) is in contact with a side surface of the first groove close to the first gear (301);

the bearing that the second follower (306) includes, the bearing surface of the second follower (306) contacts with a side surface of the second groove near the first gear (301).

8. The focusing apparatus of claim 5, further comprising an adjustment sleeve (304), a first housing (S1), and a second housing (S2);

the adjusting sleeve (304) is arranged along the outer circumferential surface of the first gear (301) and is fixedly connected with the first gear (301);

the first shell (S1) is fixedly connected with the second limiting frame (303), the second shell (S2) is fixedly connected with the connecting frame (20), and the connecting frame (20) is positioned in the second shell (S2); the first case (S1) is disposed outside the second case (S2) with a gap between the first case (S1) and the second case (S2).

9. The focusing device according to claim 8, characterized in that the surface of the adjusting sleeve (304) far away from the first gear (301) is provided with a plurality of large protrusions (T1) and a plurality of small protrusions (T2), a plurality of small protrusions (T2) are arranged between two adjacent large protrusions (T1), and the height of the large protrusions (T1) is higher than that of the small protrusions (T2).

10. The focusing device according to claim 1, characterized in that the first lens assembly (10) comprises a first lens (101) and a first lens frame (102) fixedly connected with the first lens (101), the first transmission rod (402) being fixedly connected with the first lens frame (102).

11. The focusing apparatus according to claim 10, further comprising a light shielding member (103) disposed between the first lens assembly (10) and the first gear assembly (30), wherein the light shielding member (103) is disposed circumferentially along an edge of the first lens (101), one end of the light shielding member (103) is fixedly connected to the first lens frame (102), and the opposite end of the light shielding member (103) extends to an inner side of the first gear assembly (30).

12. The focusing device according to claim 1, further comprising a second lens assembly fixedly connected with the connecting frame (20) and a clamping seat (70), wherein the second lens assembly is arranged at the center of the connecting frame (20), the clamping seat is connected with the connecting frame (20) or the second lens assembly and is positioned at one side of the second lens assembly, which is far away from the first lens assembly (10), and the clamping seat is used for being connected with a lamp body.

13. The focusing apparatus of claim 12, wherein the second lens assembly comprises a first convex lens (602) and a second convex lens (604), wherein the aperture radius of the first convex lens (602) is larger than the aperture radius of the second convex lens (604), and the first convex lens (602) and the second convex lens (604) are sequentially arranged along the direction from the first lens assembly (10) to the clamping seat (70).

14. The focusing apparatus according to claim 1, wherein the second gear assembly (40) is plural in number, the third gear assembly (50) is plural in number, and the plural second gear assemblies (40) and the plural third gear assemblies (50) are alternately arranged at intervals in a circumferential direction of the first gear assembly (30).

15. A lighting device comprising a focusing device as claimed in any one of claims 1 to 14, and a lamp body (02) fixedly connected to the focusing device;

the light emitting end of the lamp body (02) faces the light emitting side of the focusing device.

Technical Field

The application relates to the technical field of lighting, especially, relate to a focusing device and lighting device.

Background

Often need lamps and lanterns to polish at movie & TV drama, advertisement, video creation in-process, because the light-emitting effect of the lamp body itself of lamps and lanterns is limited, single light-emitting effect such as light-emitting angle undersize or too big can not satisfy various scene light filling demands, consequently needs extra annex setting in the light-emitting side of lamp body, this kind of annex can be equipped with focusing barrels such as fresnel lens or other condensing lens, realizes the accuse light of different effects through adjusting the annex.

With the improvement of a large manufacturing scene, light distribution with requirements of higher brightness, illumination and the like is also followed, so that the power requirement on the lamp is higher; due to various performance requirements such as heat dissipation and driving, the high-power lamp further increases the overall structure, and corresponding accessories (a focusing barrel and the like) arranged on the high-power lamp also need to be adjusted (increased) correspondingly. However, the focusing barrel applied to the large lamp body at present is obtained by amplifying and converting the size based on the design characteristics of the small lamp body, so that a user needs to use a large force when operating the focusing barrel, and the phenomenon of blocking easily occurs in the focusing process, which seriously affects the use efficiency of the user.

Therefore, the technical problem that the current focusing device has a blocking phenomenon in the focusing process is solved.

Disclosure of Invention

The application provides a focusing device and an illuminating device, which are used for relieving the technical problem that the blocking phenomenon occurs in the focusing process of the existing focusing device.

The application provides a focusing device, it has the light-emitting side, the focusing device includes:

a first lens assembly disposed proximate the light exit side;

the connecting frame is arranged on one side, far away from the light emitting side, of the first lens assembly;

the first gear assembly is arranged between the first lens assembly and the connecting frame and comprises a light transmitting area communicated with the light emitting side;

the second gear assembly is arranged on one side of the first gear assembly, which faces the light transmission area, is meshed with the first gear assembly, and is also connected with the first lens assembly; and

the third gear assembly is arranged on one side of the first gear assembly, which faces the light transmission area, is meshed with the first gear assembly, and is also connected with the connecting frame, wherein the third gear assembly and the second gear assembly are arranged at intervals along the circumferential direction of the first gear assembly, and the first gear assembly is used for driving the second gear assembly and the third gear assembly so as to adjust the distance between the first lens assembly and the connecting frame.

Wherein the first gear assembly comprises an annular first gear which is an internal gear,

the second gear assembly comprises a second gear and a first transmission rod which is connected with the second gear in a rotating mode, one end of the first transmission rod is fixedly connected with the first lens assembly, and the second gear is meshed with the first gear;

the third gear assembly comprises a third gear and a second transmission rod fixedly connected with the third gear, the connecting frame is provided with a transmission part, the second transmission rod is rotatably connected with the transmission part, and the third gear is meshed with the first gear; the second gear and the third gear are arranged at intervals along the circumferential direction of the first gear and are both external gears.

The surface of the second gear, which is in contact with the first transmission rod, is provided with a first internal thread, the surface of the first transmission rod, which is in contact with the second gear, is provided with a first external thread, and the first internal thread is matched with the first external thread;

the surface of the transmission part, which is contacted with the second transmission rod, is provided with a second internal thread, the surface of the second transmission rod, which is contacted with the transmission part, is provided with a second external thread, and the second internal thread is matched with the second external thread,

the first internal thread rotates in a direction opposite to the second internal thread.

The rotating direction of the first internal thread and the rotating direction of the first external thread are both right-handed, and the rotating direction of the second internal thread and the rotating direction of the second external thread are both left-handed.

The first gear assembly further comprises a first limiting frame and a second limiting frame which are arranged on two opposite sides of the first gear, and the first gear is rotatably connected with the first limiting frame and the second limiting frame respectively.

A first groove is formed in one side, facing the first gear, of the first limiting frame, a first follower is connected to one side, facing the first limiting frame, of the first gear, and the first follower is arranged in the first groove;

the second groove is formed in one side, facing the first gear, of the second limiting frame, the second follower is connected to one side, facing the second limiting frame, of the first gear, and the second follower is arranged in the second groove.

The first follower comprises a bearing, and the bearing surface of the first follower is in contact with one side surface of the first groove close to the first gear;

the bearing that the second follower includes, the bearing surface of second follower with the second recess be close to one side surface contact of first gear.

The focusing device further comprises an adjusting sleeve, a first shell and a second shell;

the adjusting sleeve is arranged along the outer circumferential surface of the first gear and is fixedly connected with the first gear;

the first shell is fixedly connected with the second limiting frame, the second shell is fixedly connected with the connecting frame, and the connecting frame is positioned in the second shell; the first housing is disposed outside the second housing with a gap therebetween.

The surface of the adjusting sleeve, which is far away from the first gear, is provided with a plurality of large bulges and a plurality of small bulges, a plurality of small bulges are arranged between every two adjacent large bulges, and the height of each large bulge is higher than that of each small bulge.

The first lens assembly comprises a first lens and a first lens frame fixedly connected with the first lens, and the first transmission rod is fixedly connected with the first lens frame.

The focusing device further comprises a light shielding component arranged between the first lens component and the first gear component, the light shielding component is arranged along the edge circumference of the first lens, one end of the light shielding component is fixedly connected with the first lens frame, and the other opposite end of the light shielding component extends to the inner side of the first gear component.

The focusing device further comprises a second lens assembly and a clamping seat, wherein the second lens assembly is fixedly connected with the connecting frame, the second lens assembly is arranged at the center of the connecting frame, the clamping seat is connected with the connecting frame or the second lens assembly, the clamping seat is located on one side, deviating from the first lens assembly, of the second lens assembly, and the clamping seat is used for being connected with the lamp body.

The second lens component comprises a first convex lens and a second convex lens, the aperture radius of the first convex lens is larger than that of the second convex lens, and the first convex lens and the second convex lens are sequentially arranged along the direction from the first lens component to the clamping seat.

The number of the second gear assemblies is multiple, the number of the third gear assemblies is multiple, and the multiple second gear assemblies and the multiple third gear assemblies are alternately arranged at intervals along the circumferential direction of the first gear.

The application also provides a lighting device, which comprises the focusing device and a lamp body fixedly connected with the focusing device;

the light emitting end of the lamp body faces the light emitting side of the focusing device.

The beneficial effect of this application is: the application provides a focusing device and lighting device, this focusing device includes: the first lens assembly, the connecting frame, a first gear assembly positioned between the first lens assembly and the connecting frame, a second gear assembly positioned between the first lens assembly and the first gear assembly, and a third gear assembly positioned between the first gear assembly and the connecting frame, wherein the second gear assembly and the third gear assembly are positioned on the inner side of the first gear assembly, the second gear assembly is connected with the first lens assembly, and the third gear assembly is connected with the connecting frame; thereby first gear assembly and second, the intermeshing of tricycle gear assembly can drive second, the tricycle gear assembly simultaneously, and then realize first lens subassembly with distance adjustment between the link, focusing device is at the focusing in-process, is located the synchronous flexible of each mechanism of first gear both sides, has increased the focusing distance, has alleviated the card of bulky focusing device in the focusing in-process through the cooperation of gear and has stopped up the problem, has improved the smoothness nature and the focusing efficiency of focusing, is applicable to jumbo size lighting apparatus's focusing and handles.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

FIG. 1 is a partially exploded view of a focusing apparatus according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a first lens assembly provided in an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a second gear assembly provided in an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a second gear provided in an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a first gear assembly provided in an embodiment of the present application.

FIG. 6 is a schematic structural diagram of a third gear assembly provided in embodiments of the present application.

Fig. 7 is a schematic structural diagram of a third gear provided in an embodiment of the present application.

Fig. 8 is a schematic structural diagram of a transmission part connected with a connecting frame according to an embodiment of the present application.

FIG. 9 is a first view of a focusing apparatus in a retracted state according to an embodiment of the present application.

FIG. 10 is a second view of a focusing apparatus in a retracted state according to an embodiment of the present application.

FIG. 11 is a cross-sectional view of a focusing apparatus in a collapsed state according to an embodiment of the present application.

Fig. 12 is a partially enlarged view of a region Z in fig. 11.

Fig. 13 is a view of a focusing apparatus provided in an embodiment of the present application in an extended state.

FIG. 14 is a cross-sectional view of a focusing apparatus according to an embodiment of the present application in an extended state.

Fig. 15 is a partial structural view of a focusing apparatus in an extended state according to an embodiment of the present application.

FIG. 16 is a partial perspective view of a focusing apparatus provided in accordance with an embodiment of the present application.

Fig. 17 is a schematic structural diagram of a lighting device provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1-17, fig. 1 is a partially exploded view of a focusing apparatus according to an embodiment of the present disclosure. It should be understood that the explosion diagram omits parts of the components and allows the internal components to leak out, for convenience of description and understanding, so that the user can more clearly see the internal related components, but it should not be understood that the actual product is the same. The focusing apparatus includes a first lens assembly 10, a second gear assembly 40, a first gear assembly 30, a third gear assembly 50, and a connecting frame 20. Wherein, the second gear assembly 40 is disposed between the first lens assembly 10 and the first gear assembly 30, the second gear assembly 40 is connected to the first gear assembly 30, the gears of the second gear assembly 40 and the first gear assembly 30 are engaged with each other, the second gear assembly 40 is further connected to the first lens assembly 10, and the second gear assembly 40 is used for adjusting the distance between the first lens assembly 10 and the first gear assembly 30, for example, the first lens assembly 10 gradually approaches or gradually moves away from the first gear assembly 30. The third gear assembly 50 is disposed between the first gear assembly 30 and the connecting frame 20, the third gear assembly 50 is connected to the first gear assembly 30, gears of the third gear assembly 50 and the first gear assembly 30 are engaged with each other, the third gear assembly 50 is further connected to the connecting frame 20, and the third gear assembly 50 is used for adjusting a distance between the first gear assembly 30 and the connecting frame 20, such as gradually approaching or gradually departing the connecting frame 20 relative to the first gear assembly 30. The first lens assembly 10 has a light emitting side, and the first gear assembly 30 includes a light transmitting region L communicated with the light emitting side a, it is understood that the first gear assembly 30 may be annular, and the center thereof is hollow to form the light transmitting region L, and light can be irradiated to the light emitting side a from the light transmitting region L. The second gear assembly 40 and the third gear assembly 50 are simultaneously disposed at a circumferential inner side of the first gear assembly 30, i.e., a side facing the light transmission region L, and the third gear assembly 50 and the second gear assembly 40 are spaced apart along a circumferential direction of the first gear assembly 30, the first gear assembly 30 being used to drive the second gear assembly 40 and the third gear assembly 50 to adjust a distance between the first lens assembly 10 and the coupling frame 20. Because the second gear assembly 40 is fixedly connected with the first lens assembly 10 and is positioned at the first end of the first gear assembly 30, and the second gear assembly 40 is meshed with the first gear assembly 30; the third gear assembly 50 is fixedly connected to the connecting frame 20 and located at the second end of the first gear assembly 30, the first end and the second end are opposite ends of the first gear assembly, and the third gear assembly 50 is meshed with the first gear assembly 30, so that when the first gear assembly 30 is rotated in the first direction, the second gear and the third gear are driven to rotate at the same time, the first lens assembly 10 and the connecting frame 20 are driven to approach each other, and when the first gear assembly 30 is rotated in the second direction, the second gear and the third gear are driven to rotate at the same time, and the first lens assembly 10 and the connecting frame 20 are driven to move away from each other; wherein the second direction is opposite to the first direction, e.g. one of which is clockwise and one of which is counter-clockwise.

Specifically, referring to fig. 2, fig. 2 is a schematic structural diagram of a first lens assembly according to an embodiment of the present disclosure. The first lens assembly 10 includes a first lens 101 and a first lens frame 102 fixedly connected to the first lens 101, the first lens 101 may be a circular or oval lens, the first lens frame 102 includes a central through hole, and the first lens 101 may be disposed on the through hole, thereby allowing the first lens assembly 10 to emit light. The first lens frame 102 may be disposed circumferentially along an edge of the first lens 101, and the first lens frame 102 serves to fix and protect the edge of the first lens 101 and to achieve connection between the first lens 101 and other members.

Alternatively, the first lens 101 may be a lens having a function of adjusting the exit direction of light, such as a fresnel lens having a focusing function. Of course, the optical lens may be an optical lens having light condensing or softening properties such as a plano-convex lens, a diffusion sheet, and a fly eye.

The focusing device has a light inlet side and a light outlet side a, light of the lamp body can enter from the light inlet side and is output from the light outlet side a, the light outlet surface of the first lens 101 faces the light outlet side a, and the first gear assembly 30 and the connecting frame 20 are both arranged on one side of the first lens assembly 10 away from the light outlet side a.

Optionally, the focusing apparatus further includes a light shielding member 103 disposed between the first lens 101 and the first gear assembly 30, the light shielding member 103 is disposed along a circumferential direction of an edge of the first lens 101 and extends in a direction away from the first lens 101, one end of the light shielding member 103 is fixedly connected to the first lens frame 102, and the opposite end of the light shielding member 103 extends to an inner side of the first gear assembly 30. The light shielding member 103 may be made of a flexible material, so that when the focusing apparatus is in a contracted state, the light shielding member 103 is folded between the first lens 101 and the first gear assembly 30; the light blocking member 103 may also be made of a hard material, in which case the light blocking member 103 retracts into the internal space of the focus mount when the focus mount is in a retracted state.

Referring to fig. 3 and 4, fig. 3 is a schematic structural diagram of a second gear assembly according to an embodiment of the present disclosure, and fig. 4 is a schematic structural diagram of a second gear according to an embodiment of the present disclosure. The second gear assembly 40 includes a second gear 401 and a first driving lever 402 rotatably connected to the second gear 401. One end of the first transmission rod 402 is fixedly connected to the first lens assembly 10, and particularly to the first lens frame 102 in the first lens assembly 10. The second gear 401 is cooperatively connected with the first gear assembly 30.

Further, the second gear 401 is an external gear, the second gear 401 has a circumferential first hole K1 therein, and the first transmission rod 402 is inserted into the first hole K1. The surface that second gear 401 and first drive lever 402 contact is provided with first internal thread, and the surface that first drive lever 402 and second gear 401 contact is provided with first external screw thread, first internal thread with first external screw thread cooperatees to realize second gear 401 and the rotation of first drive lever 402 and be connected, and in the rotation process, through screw thread transmission cooperation relation, realize the shuttle motion of first drive lever 402 in first hole K1, and then drive first lens subassembly 10 and keep away from or be close to for first gear assembly 30.

Referring further to fig. 5, fig. 5 is a schematic structural diagram of the first gear assembly 30 according to the present embodiment. The first gear assembly 30 includes a first gear 301, and a first spacing bracket 302 and a second spacing bracket 303 disposed on opposite sides of the first gear 301, wherein the first gear 301 is respectively connected to the first spacing bracket 302 and the second spacing bracket 303, that is, the first gear 301 is rotatable between the first spacing bracket 302 and the second spacing bracket 303.

The first gear 301 is a circular ring structure, a cavity surrounded by the first gear 301 is a light-transmitting area L, and light is emitted from the light-inlet side to the light-outlet side a through the light-transmitting area L. Specifically, the first gear 301 is an internal gear, the tooth structure of the first gear 301 faces the light-transmitting area L, and the first gear 301 and the second gear 401 realize transmission through meshing.

Optionally, the first gear assembly 30 further includes an adjusting sleeve 304 fixedly connected to the first gear 301, the adjusting sleeve 304 is disposed along the outer circumferential surface of the first gear 301, a surface of the adjusting sleeve 304 away from the first gear 301 is provided with a plurality of large protrusions T1 and a plurality of small protrusions T2, a plurality of small protrusions T2 are disposed between two adjacent large protrusions T1, a height of the large protrusions T1 is greater than a height of the small protrusions T2, and a height of the large protrusions T1 protruding out of the outer circumferential surface of the first gear 301 is greater than a height of the small protrusions T2 protruding out of the outer circumferential surface of the first gear 301. Wherein the large protrusions T1 may be equally spaced apart on the outer circumferential surface of the first gear 301, and the plurality of small protrusions T2 located between adjacent two large protrusions T1 may be equally spaced apart on the outer circumferential surface of the first gear 301. Alternatively, the shape of the large protrusion T1 may be an elongated protrusion or a circular arc protrusion, and the shape of the small protrusion T2 may be an elongated protrusion or a circular arc protrusion. The large protrusion T1 and the small protrusion T2 provided on the adjustment sleeve 304 are for facilitating a user to apply a rotational force to the first gear 301. It will be appreciated that since the present focus mount is bulky and requires a large amount of force for adjustment, the user's hand may abut against the large protrusion T1 and the other part may abut against the small protrusion T2, thereby greatly increasing the frictional force during adjustment.

Referring further to fig. 6 and 7, fig. 6 is a schematic structural diagram of a third gear assembly provided in the present application, and fig. 7 is a schematic structural diagram of a third gear provided in the present application. The third gear assembly 50 comprises a third gear 501 and a second transmission rod 502, wherein the third gear 501 is fixedly connected with the second transmission rod 502; the third gear 501 is an external gear, and the third gear 501 is meshed with the first gear 301 to realize transmission.

Optionally, the third gear 501 has a second hole K2, the second hole K2 is a non-circumferential hole, one end of the second transmission rod 502 has a non-circumferential surface matched with the second hole K2, the second transmission rod 502 is inserted into the second hole K2 to achieve a fixed connection, and the second transmission rod 502 is non-rotatable relative to the third gear 501.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a transmission portion connected to a connecting frame according to an embodiment of the present disclosure. One end of the second transmission rod 502 far from the third gear 501 is rotatably connected with a transmission part 503 on the connecting frame 20. Specifically, the transmission part 503 has a third hole K3 with a circular shape, the second transmission rod 502 is inserted into the third hole K3, a second internal thread is disposed on a surface of the transmission part 503 contacting the second transmission rod 502, a second external thread is disposed on a surface of the second transmission rod 502 contacting the transmission part 503, the second internal thread is matched with the second external thread to realize the rotational connection between the transmission part 503 and the second transmission rod 502, and in the rotating process, the shuttle motion of the second transmission rod 502 in the second hole K2 is realized through the thread transmission matching relationship, so as to drive the connecting frame 20 to move away from or close to the first gear assembly 30.

Wherein, the following relation exists about the thread turning directions of the internal thread and the external thread: the rotating direction of the first internal thread is opposite to that of the second internal thread, the rotating direction of the first external thread is opposite to that of the second external thread, the rotating direction of the first internal thread is the same as that of the first external thread, and the rotating direction of the second internal thread is the same as that of the second external thread, so that the mechanisms on two sides of the first gear member 30 stretch out and draw back synchronously in the rotating process of the first gear 301.

Optionally, the rotation direction of the first internal thread and the rotation direction of the first external thread are both right-handed, and the rotation direction of the second internal thread and the rotation direction of the second external thread are both left-handed.

Referring further to fig. 9 to 12, fig. 9 is a first view of a focus adjustment apparatus provided in an embodiment of the present application in a contracted state, fig. 10 is a second view of the focus adjustment apparatus provided in the embodiment of the present application in the contracted state, fig. 11 is a cross-sectional view of the focus adjustment apparatus provided in the embodiment of the present application in the contracted state, and fig. 12 is a partially enlarged view of a region Z in fig. 11.

When the focusing device is in a contracted state, the first lens assembly 10 is closest to the first gear assembly 30, and the connecting frame 20 is also closest to the first gear assembly 30; at this time, the second gear assembly 40 is in a contracted state, and the first lens assembly 10 and the first gear assembly 30 are drawn close; the third gear assembly 50 is also in a retracted state, drawing the connecting frame 20 closer to the first gear assembly 30.

The connecting frame 20 is provided with a through hole H for allowing the first driving rod 402 of the second gear assembly 40 to pass through during the contraction of the focusing apparatus, so as to prevent position interference.

The second gear 401 in the second gear assembly 40 and the third gear 501 in the third gear assembly 50 are respectively matched with the first gear 301 in the first gear assembly 30 to realize rotation transmission, the second gear 401 is clamped between the first limiting frame 302 and the second limiting frame 303 in the first gear assembly 30, the third gear 501 is clamped between the first limiting frame 302 and the second limiting frame 303 in the first gear assembly 30, and the positions of the second gear 401 and the third gear 501 are not overlapped, so that the positions of the second gear 401 and the third gear 501 are limited.

The focusing device further comprises a first shell S1 and a second shell S2, wherein the first shell S1 is fixedly connected with a second limiting frame 303 in the first gear assembly 30, the second shell S2 is fixedly connected with the connecting frame 20, the connecting frame 20 can be located in the second shell S2, and the first shell S1 can slide relative to the second shell S2. The size of the first housing S1 is larger than that of the second housing S2, it can be understood that the first housing S1 is outside, the second housing S2 is inside, and a gap is formed between the first housing S1 and the second housing S2, and when the focusing device is in a contracted state, the second housing S2 is contracted into the space inside the first housing S1.

A plurality of penetrating hole structures are arranged on the first shell S1 and the second shell S2, so that the heat dissipation capacity of the focusing device is improved. The hole structures of the first casing S1 and the second casing S2 may be arranged in a circumferential array along the casing, the hole structure on the first casing S1 is the same as and corresponding to the hole structure on the second casing S2, and when the focusing apparatus is in a fully retracted state, the hole structure on the first casing S1 and the hole structure on the second casing S2 are aligned with each other. Alternatively, the hole structures on the first case S1 and the second case S2 are both oval in shape. Of course, the shape of the heat dissipation hole may also be, for example, a circle, a hexagon, an octagon, etc., and is not particularly limited herein as long as heat dissipation can be achieved.

The focusing apparatus further includes a second lens assembly fixedly connected to the connecting frame 20 and a clamping seat 70. The second lens assembly is disposed at the center of the connecting frame 20, and the clamping seat 70 is connected to the connecting frame 20 or the second lens assembly, it is understood that the clamping seat 70 can be directly and fixedly connected to the connecting frame 20, but the clamping seat 70 can also be directly connected to the lens assembly without being directly connected to the connecting frame 20, for example, the clamping seat 70 is fixedly connected to the peripheral fixing frame of the lens assembly. The snap-in socket 70 is located on a side of the second lens assembly facing away from the first lens assembly 10, and the snap-in socket 70 is used for connecting with the lamp body.

The second lens assembly may include a first convex lens 602 and a second convex lens 604, a caliber radius of the first convex lens 602 is greater than a caliber radius of the second convex lens 604, and the first convex lens 602 and the second convex lens 604 are sequentially disposed along a direction from the first lens assembly 10 to the card socket 70. It is understood that the second lens assembly may further include a second lens frame 601, the second lens frame 601 is fixedly connected with the connection frame 20 and is located at the center of the connection frame 20, and the first convex lens 602 is fixed on the second lens frame 601; the central axis of the first convex lens 602 coincides with the central axis of the first lens 101. Further, the second lens assembly further comprises: a third lens frame 603 fixedly connected to the second lens frame 601, and a second convex lens 604 fixedly connected to the third lens frame 603, and a central axis of the second convex lens 604 coincides with a central axis of the first convex lens 602; the second convex lens 604 is close to the bayonet socket 70, the first convex lens 602 is located on a side of the second convex lens 604 far away from the bayonet socket 70, and the first convex lens 602 is not in contact with the second convex lens 604. Of course, in other embodiments, the first convex lens 602 and the second convex lens 604 may be replaced by other types of lenses, such as all concave lenses or all concave-convex lenses, or a combination of the above lenses, and so on.

The bayonet is arranged on the bayonet seat 70 and used for connecting the lamp body, and light emitted by the lamp body is emitted from the bayonet seat 70 and sequentially emitted to the third lens 604, the second lens 602 and the first lens 101, so that the adjustment of the focal length of the light is realized.

Referring further to fig. 13 to 16, fig. 13 is a view of a focusing apparatus provided in an embodiment of the present application in an extended state, fig. 14 is a cross-sectional view of the focusing apparatus provided in the embodiment of the present application in the extended state, fig. 15 is a partial structural view of the focusing apparatus provided in the embodiment of the present application in the extended state, and fig. 16 is a partial perspective view of the focusing apparatus provided in the embodiment of the present application.

When the focusing device is in an extended state, the distances between the first lens assembly 10 and the first gear assembly 30 reach the maximum, and the distances between the connecting frame 20 and the first gear assembly 30 also reach the maximum; at this time, the second gear assembly 40 is in an extended state, increasing the distance between the first lens assembly 10 and the first gear assembly 30; the third gear assembly 50 is also in an extended state, increasing the distance between the connecting frame 20 and the first gear assembly 30. The light shielding member 103 is extended or protruded inside the focusing apparatus to shield the gap between the first lens assembly 10 and the first gear assembly 30, thereby preventing light leakage in the region. And the second housing S2 is protruded from the inner space of the first housing S1 in the extended state of the focus adjustment apparatus.

The second gear 401 in the second gear assembly 40 and the third gear 501 in the third gear assembly 50 are respectively matched with the first gear 301 in the first gear assembly 30 to realize rotation transmission; the second gear 401 and the third gear 501 are both of a circular external gear structure, and the first gear 301 is of a circular internal gear structure, so that rotation transmission is realized through the meshing relationship of an internal gear and an external gear.

One side of the first limiting frame 302 facing the first gear 301 is provided with a first groove, one side of the first gear 301 facing the first limiting frame 302 is provided with a first follower 305, the first follower 305 is arranged in the first groove of the first limiting frame 302, and the first follower 305 moves along one side surface of the first groove and along the first gear 301, so that the movement path of the first gear 301 is limited.

One side of the second limiting frame 303 facing the first gear 301 is provided with a second groove, one side of the first gear 301 facing the second limiting frame 303 is provided with a second follower 306, the second follower 306 is arranged in the second groove of the second limiting frame 303, and the second follower 306 moves along one side surface of the second groove and along with the first gear 301, so that the movement path of the first gear 301 is limited. Under the combined action of the first limiting frame 302, the second limiting frame 303, the first follower 305 and the second follower 306, a rotating space of the first gear 301 is defined, and the first gear 301 is ensured to stably rotate at a fixed position.

Alternatively, the first follower 305 may be a bearing or a rotating member formed by connecting a rotating ring and a fixed shaft, and a bearing surface of the first follower 305 contacts with a side surface of the first groove on the first stopper bracket 302 close to the first gear 301, preferably a side surface of the first groove close to the adjusting sleeve 304. The second follower 306 may be a bearing or a rotating member formed by connecting a rotating ring and a fixed shaft, and a bearing surface of the second follower 306 contacts with a side surface of the second groove of the second limit stop 303 close to the first gear 301, preferably a side surface of the second groove close to the adjusting sleeve 304.

In some embodiments, the focusing apparatus includes a plurality of second gear assemblies 40, a plurality of third gear assemblies 50, and a plurality of second gear assemblies 40 and a plurality of third gear assemblies 50 alternately arranged along the circumference of the first gear assembly 30, and one third gear assembly 50 is disposed between every two adjacent second gear assemblies 40. Alternatively, the plurality of second gear assemblies 40 and the plurality of third gear assemblies 50 are equally spaced along the inner circumferential surface of the first gear assembly 30, i.e., the distance between each adjacent second gear assembly 40 and third gear assembly 50 is equal.

The number of the first followers 305 located on one side, close to the first limiting frame 302, of the first gear 301 is multiple, and the first followers are distributed at equal intervals along the circumferential direction of the first gear 301; the number of the second followers 306 located on the side of the first gear 301 close to the second limit bracket 303 is also multiple, and the second followers are distributed at equal intervals along the circumferential direction of the first gear 301. Alternatively, the number of first followers 305 is equal to the number of second gear assemblies 40 and the number of second followers 306 is equal to the number of third gear assemblies 50.

In other embodiments, the focusing apparatus includes three second gear assemblies 40 and three third gear assemblies 50, and the three second gear assemblies 40 and the three third gear assemblies 50 are alternately distributed along the inner circumferential surface of the first gear 301, and one third gear assembly 50 is disposed between every two adjacent second gear assemblies 40. Alternatively, the three second gear assemblies 40 and the three third gear assemblies 50 are equally spaced along the inner circumferential surface of the first gear 301, i.e. the distance between each adjacent second gear assembly 40 and third gear assembly 50 is equal.

Optionally, the number of the first followers 305 located on one side of the first gear 301 close to the first limit frame 302 is three, and the first followers are distributed at equal intervals along the circumferential direction of the first gear 301; the number of the second followers 306 located on the side of the first gear 301 close to the second limit bracket 303 is also three, and the second followers are distributed at equal intervals along the circumferential direction of the first gear 301.

To sum up, the focusing apparatus provided by the embodiment of the present application includes: the lens assembly comprises a first lens assembly 10, a connecting frame 20, a first gear assembly 30 positioned between the first lens assembly 10 and the connecting frame 20, a second gear assembly 40 positioned between the first lens assembly 10 and the first gear assembly 30, and a third gear assembly 50 positioned between the first gear assembly 30 and the connecting frame 20, wherein the first gear assembly 30 comprises a first gear 301, the second gear assembly 40 comprises a second gear 401 rotationally connected with the first gear 301 and a first transmission rod 402 fixedly connected with the first lens assembly 10, the second gear 401 is rotationally connected with the first transmission rod 402, the third gear assembly 50 comprises a third gear 501 rotationally connected with the first gear 301 and a second transmission rod 502 rotationally connected with the connecting frame 20, and the third gear 501 is fixedly connected with the second transmission rod 502. According to the embodiment of the application, the second gear 401 and the first transmission rod 402 are arranged in a rotating fit manner, the second transmission rod 502 and the connecting frame 20 are arranged in a rotating fit manner, the rotating transmission relationship between the first gear 301 and the second gear 401 and the rotating transmission relationship between the third gear 501 are combined, the focusing device is realized in the focusing process, the mechanisms on two sides of the first gear 301 are synchronously stretched, the focusing distance is increased, the problem of blocking in the focusing process is solved, the focusing fluency and focusing efficiency are improved, and the focusing device is suitable for focusing treatment of large-size lighting equipment.

An embodiment of the present application further provides an illumination device, please refer to fig. 17, where the illumination device includes a focusing device 01 and a lamp body 02 fixedly connected to the focusing device 01, the focusing device 01 is selected from the focusing devices described in the above embodiments of the present application, and a light emitting end of the lamp body 02 faces a light emitting side of the focusing device 01. The lighting device provided by the embodiment comprises the focusing device provided by the application, so that the lighting design scheme with large size and high power can be met, the focusing process of the lighting device is stable, and the focusing efficiency is high.

It should be noted that, although the present application has been described with reference to specific examples, the above-mentioned examples are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be limited by the appended claims.