CN213513297U

CN213513297U - Zooming mechanism of lamp

Info

Publication number: CN213513297U
Application number: CN202021586781.4U
Authority: CN
Inventors: 华正才
Original assignee: Guangzhou Omarte Lighting Co ltd
Current assignee: Guangzhou Omarte Lighting Co ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2021-06-22
Anticipated expiration: 2030-08-03

Abstract

The utility model relates to the technical field of stage lighting equipment, in particular to a zooming mechanism of a lamp, which comprises a fixed frame, a light source component, a lens component, a driving piece and a driving piece; the light source assembly is connected with the fixed frame; the driving piece is connected with the fixing frame and used for fixing the driving piece, the transmission piece is arranged along the optical axis direction of the lens assembly, the driving piece is further connected with the first end of the transmission piece, and the second end of the transmission piece is connected with the lens assembly. The utility model provides a technical scheme, drive assembly with the lens subassembly is connected, in order to drive the lens subassembly is followed the optical axis direction of lens subassembly for the mount with the displacement takes place for the light source subassembly to just can control the size of focus facula under the condition that removes less part.

Description

Zooming mechanism of lamp

Technical Field

The utility model relates to a stage lighting equipment technical field especially relates to a zoom mechanism of lamp.

Background

Threaded lens spotlights are widely used in cinematography and studio lighting. The optical system of such a spotlight consists of a screw lens and a spherical mirror.

The center of a luminous body of the light source of the screw lens spotlight lamp is positioned at the spherical center of the spherical reflector, and the light beam with continuously changed angle can be obtained by changing the front and back relative positions of the light source, the reflector and the screw lens in the optical axis direction through the facula zooming mechanism. The existing screw lens spot light generally adopts a mechanism that the screw lens is fixed and a light source and a reflector move together to realize the zooming of light spots. However, the weight of the light source together with the reflector is much greater than that of a screw lens, resulting in a complicated movement mechanism: to realize the function, a plurality of motors and motion guide parts which are symmetrically arranged with the center of an optical axis are generally needed; meanwhile, the design causes the movement mechanism to occupy large space and increases the processing and assembling cost of parts; the light source is moved to be not beneficial to arranging a heat dissipation window on the shell.

Therefore, it is necessary to change the moving part of the spot scaling mechanism into a screw lens, and on the premise of not affecting the use of the lamp, the number of motors used is reduced and the influence of the moving mechanism on the overall size of the lamp is reduced.

Therefore, there is a need for a lamp zoom mechanism with a simplified motion mechanism.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a simplified lamp zoom mechanism for a motion mechanism to solve the problem that the conventional screw lens spotlight generally adopts a fixed screw lens, and the light source and the reflector move together to realize the zooming of the light spot. However, the weight of the light source together with the reflector is much larger than that of the screw lens, resulting in a technical problem of complicating the moving mechanism.

In order to achieve the above object, the present invention provides a zoom mechanism for a lamp, the zoom mechanism comprising:

a fixed mount;

a light source assembly;

lens assembly, driving piece and driving piece;

the light source assembly is fixedly connected with the fixing frame; the fixed frame is connected with the driving piece and is used for fixing the driving piece; the transmission piece is arranged along the optical axis direction of the lens assembly, the first end of the transmission piece is connected with the driving piece, and the second end of the transmission piece is connected with the lens assembly; the driving piece drives the transmission piece to enable the lens assembly to displace relative to the fixed frame and the light source assembly along the optical axis direction of the lens assembly, so that the size of the light beam angle of the light source assembly is controlled.

Preferably, the mount includes the mounting panel and follows a plurality of fixed plates that the both sides of mounting panel set up perpendicularly, the driving medium is connected with a plurality of the fixed plate, and can be relative a plurality of the fixed plate is followed the displacement takes place for the optical axis direction of lens subassembly.

Preferably, the zoom mechanism further comprises a guide mechanism, the guide mechanism is fixedly connected with the fixing frame, and the guide mechanism is used for limiting the movement of the transmission member in a first direction, wherein the first direction is perpendicular to the optical axis direction of the lens assembly.

Preferably, the guide mechanism is a plurality of through holes formed in a plurality of fixing plates, and the transmission member passes through the plurality of through holes to limit the movement of the transmission member in the first direction.

Preferably, the guiding mechanism further comprises a sliding sleeve detachably connected in each through hole, and the transmission member passes through the sliding sleeve and is in sliding connection with the sliding sleeve.

Preferably, the zoom mechanism further comprises a spring, two ends of the spring are respectively connected with the two sliding sleeves along the optical axis direction of the lens assembly, and the spring is still in a compressed state and is used for supporting the two sliding sleeves connected with the spring.

Preferably, the driving piece includes step motor, hold-in range and follows the driving wheel, step motor with follow the driving wheel all with the mount is connected, the hold-in range with step motor all with follow the driving wheel and connect, the hold-in range still with the driving medium is connected.

Preferably, the driving medium includes a main transmission shaft and a secondary transmission shaft, the main transmission shaft and the secondary transmission shaft both pass through the guide mechanism and are in sliding connection with the guide mechanism, and the main transmission shaft and the synchronous belt are detachably connected.

Preferably, the lens assembly comprises a screw thread lens, a first clamping plate which is overlapped with the screw thread lens and is connected with a first end face of the screw thread lens, and a second clamping plate which is arranged at an interval with the first clamping plate and is connected with a second end face of the screw thread lens;

the end, close to the lens component, of the main transmission shaft and the end, close to the lens component, of the auxiliary transmission shaft penetrate through the second clamping plate and are detachably connected with the first clamping plate.

The technical scheme provided by the utility model, following advantage has:

the driving assembly is connected with the lens assembly to drive the lens assembly to displace relative to the fixed frame and the light source assembly along the optical axis direction of the lens assembly, so that the size of the beam angle of the light source assembly can be controlled under the condition of moving few parts.

Drawings

Fig. 1 is a schematic perspective view of a zoom mechanism of a lamp according to the present invention;

fig. 2 is a partially exploded view of another view angle of the zoom mechanism of the lamp according to the present invention.

In the figure: 100. a fixed mount; 110. mounting a plate; 111. a fixing plate; 112. a guide mechanism; 120. a sliding sleeve; 130. a support spring; 140. a stepping motor; 150. a synchronous belt; 160. a synchronous belt guide wheel; 170. A travel switch; 180. the stepping motor drives the circuit board; 190. a synchronous pulley; 200. a lens assembly; 210. a threaded lens; 220. a first splint; 230. a second splint; 300. a slide bar; 310. a first slide bar; 320. a second slide bar; 400. a synchronous belt fixing block;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1 and 2, an embodiment of the present invention provides a zoom mechanism of a lamp, the zoom mechanism includes a fixing frame 100, a light source assembly (not shown in the figure), a lens assembly 200, a driving member and a transmission member, the transmission member is arranged along the optical axis direction of the lens assembly 200, the fixing frame 100 is fixedly connected with the light source assembly and the driving member, and is used for fixing the driving member and the light source assembly, the lens assembly 200 is connected with the transmission member, the driving member is slidably connected with the fixing frame 100, and the driving member drives the lens assembly 200 to displace relative to the fixing frame 100 and the light source assembly along the optical axis direction of the lens assembly 200, so as to control the size.

Specifically, the light source assembly includes a light source and a reflective mirror, both of which are fixedly connected to the fixing frame 100.

Specifically, a first end of the driving member is connected to a driving end of the driving member, a second end of the driving member is fixedly connected to the lens assembly 200, and the driving member drives the driving member to enable the lens assembly 200 to displace relative to the fixing frame 100 and the light source assembly along the optical axis direction thereof.

Specifically, the fixing frame 100 includes a mounting plate 110 and a plurality of fixing plates 111 vertically disposed along two sides of the mounting plate 110, and the transmission member is connected to the plurality of fixing plates 111 and can displace along the optical axis direction of the lens assembly 200 relative to the plurality of fixing plates 111; in this application, mounting panel 110 and fixed plate 111 are the panel beating, can form the convenient assembly debugging of modularization.

The zoom mechanism further includes a guiding mechanism 112, the guiding mechanism 112 is fixedly connected to the fixing frame 100, and the guiding mechanism 112 is configured to limit movement of the transmission member in a first direction, where the first direction is perpendicular to an optical axis direction of the lens assembly 200.

Specifically, the guiding mechanism 112 is a plurality of through holes formed in a plurality of fixing plates 111, and the transmission member passes through the plurality of through holes to limit the movement of the transmission member in a first direction; in the present application, the number of the fixing plates 111 is two.

Specifically, the guiding mechanism 112 further includes a sliding sleeve 120 detachably connected in each of the through holes, and the transmission member passes through the sliding sleeve 120 and is slidably connected to the sliding sleeve 120.

Specifically, the zoom mechanism further includes a spring, two ends of the spring are respectively connected to the two sliding sleeves 120 along the optical axis direction of the lens assembly 200, and the spring is still in a compressed state and is used for supporting the two sliding sleeves 120 connected to the spring.

The driving member comprises a stepping motor 140, a synchronous belt 150 and a driven wheel, the stepping motor 140 and the driven wheel are both connected with the fixing frame 100, the synchronous belt 150 and the stepping motor 140 are both connected with the driven wheel, and the synchronous belt 150 is also connected with the transmission member; in the present application, a synchronous pulley 190 is mounted on a shaft of the stepping motor 140, the driven pulley is a synchronous belt guide wheel 160, the synchronous pulley 190 and the synchronous belt guide wheel 160 are both arranged along the optical axis direction of the lens assembly 200, an oblong hole for locking the stepping motor 140 is provided on the fixed bracket, and the distance between the stepping motor 140 and the synchronous belt guide wheel 160 can be adjusted through the oblong hole to tension the synchronous belt 150; the zoom mechanism further comprises a stepping motor driving circuit board 180 and a travel switch 170 which are arranged on the fixed frame 100; the transmission part comprises a main transmission shaft and a secondary transmission shaft, the main transmission shaft and the secondary transmission shaft both penetrate through the guide mechanism 112 and are in sliding connection with the guide mechanism 112, and the main transmission shaft is detachably connected with the synchronous belt 150; in the present application, the transmission member is a slide bar 300, the slide bar 300 includes a first slide bar 310 and a second slide bar 320, the first slide bar 310 is a main transmission shaft, and the second slide bar 320 is a secondary transmission shaft; the sliding rod 300 penetrates through the guide mechanism 112 and is connected with the guide mechanism 112 in a sliding manner; more specifically, one end of the sliding rod 300 close to the lens assembly 200 is provided with an internal thread, and the first clamping plate 220 can be fixed on the sliding rod 300 through a screw; during the use, thereby step motor drive circuit board 180 drive step motor 140 rotates and drives the motion of hold-in range 150, is fixed in hold-in range 150 with first slide bar 310, is fixed in hold-in range 150 with the final drive shaft, and the final drive shaft can obtain the linear motion of hold-in range 150 to drive lens subassembly 200 and remove, and the initial position that the second splint 230 of fixed lens subassembly 200 touched travel switch 170 locatable movement.

In order to save the space occupied by the zoom mechanism in the lamp, the transmission member is biased to one side of the lens assembly 200; in order to increase the fixing strength of the transmission member and the lens assembly 200, the transmission member passes through the second clamping plate 230 of the lens assembly 200 tightly fitted with the transmission member and then is locked with the first clamping plate 220, so that after the transmission member is locked with the first clamping plate 220, the transmission member can be clamped by the second clamping plate 230 to increase the fixing strength.

In order to fix the timing belt 150 on the first slide bar 310, a circular boss is disposed at one end of the first slide bar 310 away from the lens assembly 200 for fixing the rectangular timing belt fixing block 400, and the timing belt 150 can be fixed by locking the timing belt fixing block 400 with a clamping plate.

Because the sliding rod 300 moves to drive the lens assembly 200 to zoom, and the cantilever movement mode is that a longer sliding sleeve 120 is used for guiding to reduce swing, two pairs of sliding sleeves 120 supported by a spring in the middle are used as the guiding sleeves of the sliding rod 300, preferably, the sliding sleeve 120 is a short sliding sleeve 120, which can reduce the problems of difficulty in control of concentricity processing caused by the long sliding sleeve 120, large friction force with the sliding rod 300 and higher cost, the sliding sleeves 120 are provided with two pairs in total, and each pair is arranged on the upper and lower bending edges of the fixing frame 100 up and down and supported by the spring in the middle.

Specifically, the lens assembly 200 includes a screw lens 210, a first clamping plate 220 stacked on the screw lens 210 and connected to a first end surface of the screw lens 210, and a second clamping plate 230 spaced from the first clamping plate 220 and connected to a second end surface of the screw lens 210, such that the screw lens 210 is clamped in the middle by the first clamping plate 220 and the second clamping plate 230; the ends of the master and slave transmission shafts close to the lens assembly 200 both pass through the second clamping plate 230 and are detachably connected to the first clamping plate 220.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A zoom mechanism for a lamp, the zoom mechanism comprising:

a fixed mount;

a light source assembly;

lens assembly, driving piece and driving piece;

2. The zoom mechanism of claim 1, wherein: the mount includes the mounting panel and follows a plurality of fixed plates that the both sides of mounting panel set up perpendicularly, the driving medium is with a plurality of the fixed plate is connected, just can be a plurality of relatively the fixed plate is followed the displacement takes place for the optical axis direction of lens subassembly.

3. The zoom mechanism of claim 2, wherein: the zoom mechanism further comprises a guide mechanism, the guide mechanism is fixedly connected with the fixing frame, and the guide mechanism is used for limiting the movement of the transmission piece in a first direction, wherein the first direction is perpendicular to the optical axis direction of the lens assembly.

4. The zoom mechanism of claim 3, wherein: the guide mechanism is a plurality of through holes formed in the fixing plates, and the transmission piece penetrates through the through holes to limit the movement of the transmission piece in the first direction.

5. The zoom mechanism of claim 4, wherein: the guiding mechanism further comprises a sliding sleeve detachably connected in each through hole, and the transmission piece penetrates through the sliding sleeve and is in sliding connection with the sliding sleeve.

6. The zoom mechanism of claim 5, wherein: the zoom mechanism further comprises a spring, two ends of the spring are respectively connected with the two sliding sleeves along the optical axis direction of the lens assembly, and the spring is still in a compressed state and used for supporting the two sliding sleeves connected with the spring.

7. The zoom mechanism of claim 6, wherein: the driving piece comprises a stepping motor, a synchronous belt and a driven wheel, the stepping motor and the driven wheel are connected with the fixing frame, the synchronous belt is connected with the stepping motor and the driven wheel, and the synchronous belt is further connected with the transmission piece.

8. The zoom mechanism of claim 7, wherein: the driving medium includes final drive shaft and follows the transmission shaft, final drive shaft with follow the transmission shaft and all pass guiding mechanism and with guiding mechanism sliding connection, final drive shaft with the connection can be dismantled to the hold-in range.

9. The zoom mechanism of claim 8, wherein: the lens component comprises a threaded lens, a first clamping plate and a second clamping plate, wherein the first clamping plate is overlapped with the threaded lens and is connected with the first end face of the threaded lens, and the second clamping plate is arranged at an interval with the first clamping plate and is connected with the second end face of the threaded lens;