CN108317483B - Focusing structure of zooming imaging lamp - Google Patents

Abstract

The invention relates to the technical field of zoom imaging lamps, in particular to a zoom imaging lamp focusing structure, which comprises a lens barrel, a zoom lens assembly and a focusing lens assembly, wherein the zoom lens assembly and the focusing lens assembly are arranged in the lens barrel and positioned on the same optical axis, the zoom imaging lamp focusing structure also comprises a movable bracket which is arranged in the lens barrel and is used for installing two lens assemblies, a strip-shaped opening is arranged on the side wall of the lens barrel, and a zoom adjusting device which penetrates through the strip-shaped opening, is connected with the movable bracket and is used for driving the movable bracket to move is arranged outside the lens barrel; the movable support is provided with a slide guiding device, the focusing lens assembly can slide along the slide guiding device, and a focusing adjusting device which penetrates through the strip-shaped opening and is connected with the focusing lens assembly and is used for driving the focusing lens assembly to move relative to the zooming lens assembly is further arranged outside the lens barrel. The zoom adjusting device can drive the movable support to move so as to realize linkage of the zoom lens assembly and the focus lens assembly, and the focus adjusting device can independently drive the focus lens assembly to move relative to the zoom lens assembly so as to realize focusing, so that focusing is accurate, irradiation effect is ensured, and operation is simple.

Description

Focusing structure of zooming imaging lamp

Technical Field

The invention relates to the technical field of zoom imaging lamps, in particular to a focusing structure of a zoom imaging lamp.

Background

The zoom imaging lamp is a lamp commonly used in stage theatres and various performance theatres, and in use, the lamp is often required to be zoomed and focused according to the light distribution requirement. The existing zoom lens component and the existing focusing lens component are generally arranged independently, and are adjusted by an independent focusing structure to move independently respectively so as to achieve the purposes of zooming and focusing, so that focusing is inaccurate, the irradiation effect is affected, and the operation is complex.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a focusing structure of a zoom imaging lamp, which not only can realize linkage of a zoom lens component and a focusing lens component to achieve the purpose of zooming, but also can independently adjust the movement of the focusing lens component to achieve the purpose of focusing, is accurate in focusing, ensures the irradiation effect and is simple to operate.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the zoom imaging lamp focusing structure comprises a lens barrel, a zoom lens assembly and a focusing lens assembly which are arranged in the lens barrel and positioned on the same optical axis, and a movable bracket which is arranged in the lens barrel and used for installing the two lens assemblies, wherein a strip-shaped opening is arranged on the side wall of the lens barrel, and a zoom adjusting device which penetrates the strip-shaped opening, is connected with the movable bracket and is used for driving the movable bracket to move is arranged outside the lens barrel; the movable support is provided with a slide guiding device, the focusing lens assembly can slide along the slide guiding device, and a focusing adjusting device which penetrates through the strip-shaped opening and is connected with the focusing lens assembly and is used for driving the focusing lens assembly to move relative to the zooming lens assembly is further arranged outside the lens barrel.

In the scheme, the zoom adjusting device can drive the movable support to move so as to realize linkage of the zoom lens assembly and the focus lens assembly to achieve the zoom purpose, and the focus adjusting device can independently drive the focus lens assembly to move relative to the zoom lens assembly to achieve the focus purpose, so that focusing is accurate, irradiation effect is guaranteed, and operation is simple.

Preferably, the zoom adjusting device comprises a gear rotary handle and a rack which are meshed with each other through teeth; the gear rotating handle is at least partially arranged on the outer side of the lens barrel, and the rack is fixedly arranged on the outer side wall or the inner side wall of the lens barrel; the gear rotating handle is internally provided with a connecting part connected with the movable bracket. When the gear rotating handle is rotated, the gear rotating handle moves along the teeth on the rack to drive the connecting part to transversely move, and the connecting part moves to drive the movable bracket to move so as to enable the zoom lens component and the focus lens component to be linked to achieve the zoom purpose; when the gear rotating handle rotates, the connecting part only transversely moves and does not rotate, so that the gear rotating handle is connected with the connecting part through the bearing.

Further preferably, the gear rotating handle is provided with silk-screen graduations. The user can rotate the gear rotating handle to the corresponding silk screen graduation according to actual needs, so that accurate zooming is facilitated.

Further preferably, the gear rotating handle is arranged at the outer side of the lens barrel, and the rack is fixedly arranged at the outer side wall of the lens barrel; a pressing plate is arranged between the lens cone and the gear rotating handle, and the connecting part is fixed on the pressing plate; the position of the pressing plate, which is opposite to the rack, is provided with a bending structure for shielding the rack, the pressing plate is provided with a slotted hole, and the gear rotating handle penetrates through the slotted hole to be meshed with the rack. The gear rotating handle is arranged on the outer side of the lens barrel, and the rack is arranged on the outer side wall of the lens barrel, so that the gear rotating handle is convenient to install; the arrangement of the pressing plate can prevent the rack from being exposed outside, so that the attractiveness of the focusing structure is improved; because the connecting part is fixed on the pressing plate, when the gear is rotated to rotate the handle, the pressing plate moves along with the handle.

Still further preferably, the lens barrel is provided with a first chute for sliding the pressing plate. When the movable support moves, the pressing plate slides along the first sliding groove, so that the stability of movement of the movable support is improved, and the accuracy of zooming is improved.

Preferably, a zoom fastening device is further included for fixing the relative position of the gear rotary handle and the rack. The setting can lock the zoom position to be motionless so as to ensure the irradiation effect.

Still preferably, the zoom fastening device includes a screw rotating handle and a screw fixing seat which are disposed outside the lens barrel and coaxially disposed with the gear rotating handle, the screw rotating handle and the screw fixing seat are connected by threads, the screw rotating handle is disposed outside the screw fixing seat, and the screw fixing seat is connected with the connecting portion; one part of the screw rotating handle is positioned in the gear rotating handle, and the other part of the screw rotating handle is positioned outside the gear rotating handle; the screw rotating handle is used for controlling the degree of adhesion between the pressing plate and the outer side wall of the lens cone. When zooming in place, the screw rotating handle is rotated, and the screw rotating handle moves along the screw fixing seat through threads to press the pressing plate and the outer side wall of the lens cone, so that the pressing plate cannot move relative to the outer side wall of the lens cone, and the position of the movable support is kept motionless to achieve the purpose of locking the zooming position.

Still more preferably, the platen is a plastic structure. The friction force between the pressing plate and the outer side wall of the lens barrel can be increased, so that the zooming position can be locked better.

The focus adjusting device has two schemes: the first is that the screw rotating handle is coaxially arranged, the coaxial arrangement can fully utilize the space, and the cost is saved; the second is not arranged coaxially with the screw rotating handle.

In a first aspect, a focus adjustment device includes a pulley handle, a pulley, and a belt; the belt pulley handle is coaxially arranged on the outer side of the screw rotating handle, the belt pulley is rotationally arranged on the movable support, the belt pulley handle is provided with a rotating shaft, the rotating shaft penetrates through the screw fixing seat and the connecting portion and then is connected with the belt pulley, the belt is sleeved on the belt pulley, and the focusing lens assembly is fixedly arranged on one side edge of the belt. After the zooming position is locked, the belt pulley handle is rotated to enable the rotating shaft to rotate, the rotating shaft rotates to drive the belt pulley to rotate, and the belt pulley rotates to drive the belt to rotate so that the focusing lens assembly moves relative to the zooming lens assembly, and therefore the focusing purpose is achieved. Preferably, the rotating shaft, the belt pulley handle and the screw rotating handle are coaxially arranged; the arrangement is convenient for a user to operate so as to finish focusing as soon as possible.

In a second scheme, the focusing adjustment device comprises a belt pulley handle, a belt pulley and a belt; the belt pulley handle is arranged on the outer side of the lens barrel, the belt pulley is rotationally arranged on the movable support, a rotating shaft connected with the belt pulley is arranged on the belt pulley handle, the belt is sleeved on the belt pulley, and the focusing lens assembly is fixedly arranged on one side edge of the belt. Preferably, the rotating shaft and the pulley handle are coaxially arranged.

Further preferably, the lens assembly further comprises a belt pressing block, and the focusing lens assembly is fixedly arranged on one side edge of the belt through the belt pressing block.

Preferably, focusing fastening means are also included for locking the pulley handle to stop rotation of the pulley. The focusing position can be locked and fixed by the arrangement, so that the irradiation effect is ensured.

Further preferably, the focusing fastening device is a locking screw provided on the pulley handle. When focusing is in place, the locking screw can be inserted into the screw rotating handle or the hole on the outer side wall of the lens cone, so that the belt pulley handle can not rotate continuously.

Preferably, a second chute for sliding the movable bracket is arranged on the inner wall of the lens barrel. The stability that the movable support removed can be improved to the setting like this, and then improves the degree of accuracy that zooms.

Preferably, the sliding guide device is a sliding rod arranged on the movable support, and the focusing lens assembly is sleeved on the sliding rod.

Further preferably, a fixed bracket is fixedly arranged on the focusing lens assembly, the fixed bracket is sleeved on the sliding rod, and a sliding sleeve is arranged at the contact position of the fixed bracket and the sliding rod. The sliding sleeve can prevent the fixed support from sliding back and forth along the sliding rod to damage the sliding rod, so that the service life of the sliding rod is ensured.

Preferably, the zoom lens component is fixed at one end of the movable support, the other end of the movable support is provided with a mounting plate, and two ends of the sliding rod are respectively fixed on the zoom lens component and the mounting plate.

Preferably, shock absorbing glue and a clamp spring are arranged at the contact positions of the two ends of the sliding rod and the zoom lens assembly and the mounting plate, and the clamp spring is positioned at the end part of the sliding rod.

Compared with the prior art, the invention has the beneficial effects that:

according to the focusing structure of the zoom imaging lamp, the zoom adjusting device can drive the support to move so as to realize linkage of the zoom lens component and the focusing lens component to achieve the purpose of zooming, and the focusing adjusting device can independently drive the focusing lens component to move relative to the zoom lens component to achieve the purpose of focusing, so that focusing is accurate, irradiation effect is guaranteed, and operation is simple.

Drawings

Fig. 1 is an exploded view of a focusing structure of a zoom imaging lamp according to the present embodiment.

Fig. 2 is a schematic diagram of a focusing structure of a zoom imaging lamp according to the present embodiment, in which part of the components are in a disassembled state.

Fig. 3 is a sectional view of a focusing structure of a zoom imaging lamp according to the present embodiment.

Fig. 4 is a schematic diagram illustrating connection between two lens assemblies and a movable bracket in the present embodiment.

Fig. 5 is a schematic diagram illustrating another angle connection between two lens assemblies and a movable bracket in the present embodiment.

Detailed Description

The invention is further described below in connection with the following detailed description. Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.

Examples

The embodiment of a focusing structure of a zoom imaging lamp, as shown in fig. 1 to 5, comprises a lens barrel 1, a zoom lens assembly 3 and a focusing lens assembly 9 which are arranged in the lens barrel 1 and positioned on the same optical axis, and a movable bracket 2 which is arranged in the lens barrel 1 and used for installing two lens assemblies, wherein a strip-shaped opening is arranged on the side wall of the lens barrel 1, and a zoom adjusting device which penetrates the strip-shaped opening, is connected with the movable bracket 2 and used for driving the movable bracket 2 to move is arranged outside the lens barrel 1; the movable bracket 2 is provided with a slide guiding device, the focusing lens assembly 9 can slide along the slide guiding device, and the lens barrel 1 is also provided with a focusing adjusting device which penetrates the strip-shaped opening and is connected with the focusing lens assembly 9 and is used for driving the focusing lens assembly 9 to move relative to the zoom lens assembly 3.

When the focusing structure is used, the movable support 2 is driven to move through the zooming adjusting device, and as the zooming lens component 3 and the focusing lens component 9 are arranged on the movable support 2, the two lens components can move together along with the movable support 2, so that the purpose of zooming is achieved in a linkage mode, the focusing lens component 9 is independently driven to slide along the sliding guide device through the focusing adjusting device, the focusing lens component 9 moves relative to the zooming lens component 3 to achieve the purpose of focusing, the focusing structure is accurate in focusing, the irradiation effect is guaranteed, and the operation is simple.

Wherein the zoom adjusting device comprises a gear rotary handle 12 and a rack 13 which are meshed with each other through teeth; the gear rotating handle 12 is at least partially arranged on the outer side of the lens cone 1, and the rack 13 is fixedly arranged on the outer side wall or the inner side wall of the lens cone 1; the gear rotating handle 12 is provided with a connecting part 31 connected with the movable bracket 2. When the gear rotating handle 12 is rotated, the gear rotating handle 12 moves along the teeth on the rack 13 to drive the connecting part 31 to transversely move, and the connecting part 31 moves to drive the movable bracket 2 to move so as to enable the zoom lens component 3 and the focus lens component 9 to be linked to achieve the zoom purpose; when the gear rotating handle 12 rotates, the connecting part 31 only moves transversely and does not rotate, so that the gear rotating handle 12 can be connected with the connecting part 31 through a bearing.

In this embodiment, the gear rotary handle 12 is provided with silk-screened graduations. The user can rotate the gear rotary handle 12 to the corresponding silk-screen graduation according to actual needs, so as to facilitate accurate zooming.

In addition, the gear rotating handle 12 is arranged on the outer side of the lens barrel 1, and the rack 13 is fixedly arranged on the outer side wall of the lens barrel 1; a pressing plate 19 is arranged between the lens cone 1 and the gear rotary handle 12, and a connecting part 31 is fixed on the pressing plate 19; the position of the pressing plate 19, which is opposite to the rack 13, is in a bending structure to shield the rack 13, a slotted hole is formed in the pressing plate 19, and the gear rotating handle 12 penetrates through the slotted hole to be meshed with the rack 13. The gear rotating handle 12 is arranged on the outer side of the lens barrel 1, and the rack 13 is arranged on the outer side wall of the lens barrel 1, so that the gear rotating handle 12 is convenient to install; the arrangement of the pressing plate 19 can prevent the rack 13 from being exposed outside, so that the attractive appearance of the focusing structure is improved; since the connecting portion 31 is fixed to the pressing plate 19, the pressing plate 19 moves as the handle 12 is rotated by the rotation gear.

In the present embodiment, the lens barrel 1 is provided with a first chute 32 for sliding the pressing plate 19. When the movable support 2 moves, the pressing plate 19 slides along the first sliding groove 32, which helps to improve the stability of movement of the movable support 2, and further improves the accuracy of zooming.

Wherein, a zoom fastening device is also included for fixing the relative position of the gear rotary handle 12 and the rack 13. The setting can lock the zoom position to be motionless so as to ensure the irradiation effect.

In this embodiment, the zoom fastening device includes a screw rotating handle 15 and a screw fixing seat 14, which are disposed outside the lens barrel 1 and coaxially disposed with the gear rotating handle 12, and are connected by threads, the screw rotating handle 15 is disposed outside the screw fixing seat 14, and the screw fixing seat 14 is connected with the connecting portion 31; a part of the screw rotating handle 15 is positioned in the gear rotating handle 12, and the other part is positioned outside the gear rotating handle 12; the screw rotating handle 15 is used for controlling the degree of adhesion between the pressing plate 19 and the outer side wall of the lens barrel 1. When zooming is in place, the screw rotating handle 15 is rotated, and the screw rotating handle 15 moves along the screw fixing seat 14 through threads to press the pressing plate 19 and the outer side wall of the lens barrel 1, so that the pressing plate 19 cannot move relative to the outer side wall of the lens barrel 1, and the position of the movable support 2 is kept motionless to achieve the purpose of locking the zooming position.

In addition, the pressing plate 19 is of a plastic structure. This arrangement can increase the friction between the pressure plate 19 and the outer side wall of the lens barrel 1 to better lock the zoom position.

The focusing adjustment device has two schemes: the first is that the screw rotating handle 15 is coaxially arranged, so that the space can be fully utilized by the coaxial arrangement, and the cost is saved; the second is not coaxially arranged with the screw rotation handle 15.

In a first version, the focus adjustment means comprises a pulley handle 16, a pulley 10 and a belt 11; the pulley handle 16 is coaxially arranged at the outer side of the screw rotating handle 15, the pulley 10 is rotatably arranged on the movable bracket 2, the pulley handle 16 is provided with a rotating shaft 40, the rotating shaft 40 passes through the screw fixing seat 14 and the connecting part 31 and then is connected with the pulley 10, the belt 11 is sleeved on the pulley 10, and the focusing lens assembly 9 is fixedly arranged on one side edge of the belt 11. After the zooming position is locked, the pulley handle 16 is rotated to enable the rotating shaft 40 to rotate, the rotating shaft 40 rotates to drive the pulley 10 to rotate, and the pulley 10 rotates to drive the belt 11 to rotate so as to enable the focusing lens assembly 9 to move relative to the zooming lens assembly 3, so that the focusing purpose is achieved. At this time, the rotation shaft 40, the pulley handle 16 and the screw rotation handle 15 may be coaxially provided; the arrangement is convenient for a user to operate so as to finish focusing as soon as possible.

In the second embodiment, the focus adjustment device comprises a pulley handle 16, a pulley 10 and a belt 11; the pulley handle 16 is arranged on the outer side of the lens barrel 1, the pulley 10 is rotatably arranged on the movable support 2, a rotating shaft 40 connected with the pulley 10 is arranged on the pulley handle 16, the belt 11 is sleeved on the pulley 10, and the focusing lens assembly 9 is fixedly arranged on one side edge of the belt 11. In this case, the rotation shaft 40 and the pulley handle 16 may be coaxially disposed.

In this embodiment, the focus adjustment apparatus preferentially uses the first scheme.

In addition, the belt press block 18 is further included, and the focusing lens assembly 9 is fixedly arranged on one side edge of the belt 11 through the belt press block 18.

A focus fastening means is included for locking pulley handle 16 to stop pulley 10 from rotating. The focusing position can be locked and fixed by the arrangement, so that the irradiation effect is ensured.

In this embodiment, the focusing fastening device is a locking screw 17 provided on the pulley handle 16. When the focusing adjustment device adopts the first scheme, when focusing is in place, the locking screw 17 can be inserted into the hole of the screw rotating handle 15, so that the pulley handle 16 cannot rotate continuously; when the second scheme is used for the focusing adjustment device, when focusing is in place, the locking screw 17 can be inserted into the hole on the outer side wall of the lens barrel 1, so that the pulley handle 16 cannot rotate continuously.

In addition, a second chute 30 for sliding the movable bracket 2 is provided on the inner wall of the lens barrel 1. This arrangement can improve the stability of movement of the movable bracket 2, and thus improve the accuracy of zooming.

The sliding guide device is a sliding rod 6 arranged on the movable support 2, and the focusing lens assembly 9 is sleeved on the sliding rod 6.

In this embodiment, the focusing lens assembly 9 is fixedly provided with a fixing bracket 8, the fixing bracket 8 is sleeved on the sliding rod 6, and a sliding sleeve 7 is arranged at the contact position of the fixing bracket 8 and the sliding rod. The sliding sleeve 7 can prevent the fixed bracket 8 from sliding back and forth along the sliding rod 6 to damage the sliding rod 6 so as to ensure the service life of the sliding rod 6.

In addition, the zoom lens component 3 is fixed at one end of the movable support 2, the other end of the movable support 2 is provided with a mounting plate, and two ends of the slide bar 6 are respectively fixed on the zoom lens component 3 and the mounting plate.

In this embodiment, the contact position between the two ends of the slide bar 6 and the zoom lens assembly 3 and the mounting plate is provided with a damping rubber 4 and a clamping spring 5, and the clamping spring 5 is located at the end of the slide bar 6.

It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims (17)

1. The zoom imaging lamp focusing structure comprises a lens barrel (1), a zoom lens assembly (3) and a focusing lens assembly (9) which are arranged in the lens barrel (1) and positioned on the same optical axis, and is characterized by further comprising a movable bracket (2) which is arranged in the lens barrel (1) and used for installing two lens assemblies, wherein a strip-shaped opening is arranged on the side wall of the lens barrel (1), and a zoom adjusting device which penetrates through the strip-shaped opening, is connected with the movable bracket (2) and is used for driving the movable bracket (2) to move is arranged outside the lens barrel (1); a slide guiding device is arranged on the movable bracket (2), the focusing lens assembly (9) can slide along the slide guiding device, and a focusing adjusting device which penetrates into the strip-shaped opening to be connected with the focusing lens assembly (9) and is used for driving the focusing lens assembly (9) to move relative to the zoom lens assembly (3) is also arranged outside the lens barrel (1);

the zoom adjusting device comprises a gear rotary handle (12) meshed with the teeth and a rack (13); the gear rotating handle (12) is at least partially arranged at the outer side of the lens barrel (1), and the rack (13) is fixedly arranged at the outer side wall or the inner side wall of the lens barrel (1); a connecting part (31) connected with the movable bracket (2) is arranged in the gear rotating handle (12);

a pressing plate (19) is arranged between the lens cone (1) and the gear rotating handle (12), and a connecting part (31) is fixed on the pressing plate (19);

the zoom fastening device is used for fixing the relative positions of the gear rotary handle (12) and the rack (13);

the zooming fastening device comprises a screw rotating handle (15) and a screw fixing seat (14) which are arranged outside the lens cone (1) and are coaxially arranged with the gear rotating handle (12), the screw rotating handle (15) and the screw fixing seat are connected through threads, the screw rotating handle (15) is positioned at the outer side of the screw fixing seat (14), and the screw fixing seat (14) is connected with the connecting part (31); one part of the screw rotating handle (15) is positioned in the gear rotating handle (12), and the other part is positioned outside the gear rotating handle (12); the screw rotating handle (15) is used for controlling the degree of adhesion between the pressing plate (19) and the outer side wall of the lens cone (1).

2. A zoom imaging lamp focusing arrangement according to claim 1, characterized in that the gear wheel rotary handle (12) is provided with silk-screened graduations.

3. The focusing structure of the zoom imaging lamp according to claim 1, wherein the gear rotating handle (12) is arranged on the outer side of the lens barrel (1), and the rack (13) is fixedly arranged on the outer side wall of the lens barrel (1); the position of the pressing plate (19) right against the rack (13) is in a bending structure to shield the rack (13), a slotted hole is formed in the pressing plate (19), and the gear rotating handle (12) penetrates through the slotted hole to be meshed with the rack (13).

4. A zoom imaging lamp focusing structure according to claim 1, characterized in that the lens barrel (1) is provided with a first chute (32) for sliding the pressing plate (19).

5. A zoom imaging lamp focusing arrangement according to claim 1, characterized in that the pressure plate (19) is of plastic construction.

6. A zoom imaging lamp focusing structure according to claim 1, wherein the focus adjusting means comprises a pulley handle (16), a pulley (10) and a belt (11); the belt pulley handle (16) is coaxially arranged on the outer side of the screw rotating handle (15), the belt pulley (10) is rotationally arranged on the movable support (2), the belt pulley handle (16) is provided with a rotating shaft (40), the rotating shaft (40) penetrates through the screw fixing seat (14) and the connecting portion (31) and then is connected with the belt pulley (10), the belt (11) is sleeved on the belt pulley (10), and the focusing lens assembly (9) is fixedly arranged on one side edge of the belt (11).

7. A zoom imaging lamp focusing arrangement as claimed in claim 6, wherein the rotation shaft (40), pulley handle (16) and screw rotation handle (15) are coaxially arranged.

8. A zoom imaging lamp focusing structure according to claim 1, wherein the focus adjusting means comprises a pulley handle (16), a pulley (10) and a belt (11); the pulley handle (16) is arranged on the outer side of the lens barrel (1), the pulley (10) is rotationally arranged on the movable support (2), a rotating shaft (40) connected with the pulley (10) is arranged on the pulley handle (16), the belt (11) is sleeved on the pulley (10), and the focusing lens assembly (9) is fixedly arranged on one side edge of the belt (11).

9. A zoom imaging lamp focusing arrangement as claimed in claim 8, wherein the rotation shaft (40) and the pulley handle (16) are coaxially arranged.

10. A zoom imaging lamp focusing structure according to claim 6 or 8, further comprising a belt press block (18), wherein the focusing lens assembly (9) is fixedly arranged on one side edge of the belt (11) through the belt press block (18).

11. A zoom imaging lamp focusing configuration as claimed in claim 6 or 8, further comprising focusing fastening means for locking the pulley handle (16) to stop rotation of the pulley (10).

12. A zoom imaging lamp focusing arrangement as claimed in claim 11, wherein the focus fastening means is a locking screw (17) provided on a pulley handle (16).

13. The zoom imaging lamp focusing structure according to claim 1, wherein a second chute (30) for sliding the movable bracket (2) is provided on the inner wall of the lens barrel (1).

14. The focusing structure of a zoom imaging lamp according to claim 1, wherein the slide guiding device is a slide bar (6) arranged on the movable support (2), and the focusing lens assembly (9) is sleeved on the slide bar (6).

15. The zoom imaging lamp focusing structure according to claim 14, wherein a fixed support (8) is fixedly arranged on the focusing lens assembly (9), the fixed support (8) is sleeved on the sliding rod (6), and a sliding sleeve (7) is arranged at the contact position of the fixed support and the sliding rod.

16. The zoom imaging lamp focusing structure according to claim 14, wherein the zoom lens assembly (3) is fixed at one end of the movable support (2), the other end of the movable support (2) is provided with a mounting plate, and two ends of the slide bar (6) are respectively fixed on the zoom lens assembly (3) and the mounting plate.

17. The zoom imaging lamp focusing structure according to claim 16, wherein shock absorbing glue (4) and a snap spring (5) are arranged at the contact position of the two ends of the slide rod (6) with the zoom lens assembly (3) and the mounting plate, and the snap spring (5) is located at the end part of the slide rod (6).