CN218585077U

CN218585077U - Zooming structure of large-caliber high-zoom-ratio continuous zoom lens

Info

Publication number: CN218585077U
Application number: CN202221837579.3U
Authority: CN
Inventors: 钟兆铨; 黄灯辉; 屈立辉; 黄伟奇; 陈秀秀
Original assignee: Fujian Forecam Tiantong Optics Co Ltd
Current assignee: Fujian Forecam Tiantong Optics Co Ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2023-03-07
Anticipated expiration: 2032-07-18

Abstract

The utility model relates to a heavy-calibre, high zoom ratio zoom structure of zoom in succession, including the camera lens structure, the focusing subassembly that the camera lens structure set gradually from left to right, zoom subassembly and after-fixing subassembly, the focusing subassembly includes by outer focusing cam that sets gradually to interior, focusing main lens cone and focusing lens cone, install focusing group lens in the focusing lens cone, be equipped with the straight line orbit straight flute on the focusing main lens cone, be equipped with the focusing cam groove on the focusing cam, it leads the nail subassembly to be equipped with the focusing on the focusing lens cone, the focusing is led the nail subassembly and is passed inside the straight line orbit straight flute extends to the focusing cam groove, focusing cam and focusing main lens cone normal running fit. The utility model discloses simple structure, reasonable in design, the precision is high, thereby through the structural style of suitable change zoom balladeur train and compensation balladeur train in heavy-calibre zoom system, thereby the stability of whole continuous zoom process optical system is guaranteed to the even as far as possible of atress in the motion process of messenger's balladeur train in the main lens cone.

Description

Zooming structure of large-caliber high-zoom-ratio continuous zoom lens

Technical Field

The utility model relates to a heavy-calibre, high zoom ratio zoom lens structure that zooms in succession.

Background

In order to accurately position a far target and a near target, the zoom stroke of a system is very long due to the high zoom ratio in the use process of the traditional large-caliber high-zoom-ratio continuous zoom lens, so that the precision of the lens in the zooming process is low, and the optical axis repetition precision is tested.

SUMMERY OF THE UTILITY MODEL

The utility model discloses improve above-mentioned problem, promptly the to-be-solved technical problem of the utility model is to provide a heavy-calibre, high zoom ratio zoom structure in succession of zoom is favorable to solving the problem that traditional heavy-calibre zoom lens optical axis repeatability is not high around the process of zooming.

The utility model discloses a constitute like this, it includes the camera lens structure, focusing subassembly, the subassembly and the after-fixing subassembly that the camera lens structure set gradually from left to right, the focusing subassembly includes by outer focusing cam, focusing main lens cone and the focusing lens cone that sets gradually to interior, install focusing group lens in the focusing lens cone, be equipped with the straight line orbit straight flute on the focusing main lens cone, be equipped with the focusing cam groove on the focusing cam, it leads nail subassembly to be equipped with the focusing on the focusing lens cone, the focusing is led nail subassembly and is passed inside the straight line orbit straight flute extends to the focusing cam groove, focusing cam and focusing main lens cone normal running fit are used for leading nail subassembly to drive the focusing lens cone through the focusing and do the round and go linear motion of law in the focusing main lens cone.

Furthermore, a focusing motor, a focusing potentiometer and two first micro switches are arranged outside the focusing main lens barrel, the two first micro switches are respectively located at two ends of the focusing cam groove, the focusing potentiometer is connected with the focusing main lens barrel through a focusing potentiometer frame, the focusing motor is connected with the focusing main lens barrel through a focusing motor frame, a focusing cam tooth part is arranged outside the right side of the focusing cam, a focusing motor gear meshed with the focusing cam tooth part is arranged at the output end of the focusing motor, and a focusing potentiometer gear meshed with Jiao Chibu is also arranged at the output end of the focusing potentiometer.

Furthermore, the zooming component comprises a main lens cone, a zooming component arranged inside the left side of the main lens cone and a compensating component arranged inside the right side of the main lens cone, a zooming cam is arranged outside the main lens cone, the zooming component comprises a zooming carriage, a zooming lens cone and a zooming group lens, the zooming carriage, the zooming lens group lens and the zooming group lens are sequentially arranged from outside to inside, the compensating component comprises a compensating carriage, a compensating lens cone and a compensating group lens, the compensating group lens is sequentially arranged from outside to inside, the compensating group lens is arranged in the compensating lens cone, a straight groove is formed in the main lens cone, a zooming curve groove and a compensating curve groove are respectively formed in two sides of the zooming cam, a zooming guide pin component penetrating through the straight groove and extending into the zooming curve groove is formed in the zooming carriage, and a compensating guide pin component penetrating through the straight groove and extending into the compensating curve groove is formed in the compensating carriage.

Furthermore, a zooming motor is arranged on the outer side of the zooming cam, a zooming cam tooth part is arranged on the outer portion of the left side of the zooming cam, and a zooming motor gear meshed with the zooming cam tooth part is arranged at the output end of the zooming motor.

Furthermore, the end points of the two sides of the zooming curve slot and the compensation curve slot are provided with second micro switches for in-place power-off protection of the mechanism.

Furthermore, a zooming potentiometer is arranged outside the zooming cam, and a zooming potentiometer gear meshed with the zooming cam gear is arranged at the output end of the zooming potentiometer.

Furthermore, a connecting bottom plate is arranged below the lens structure, and the focusing assembly, the zooming assembly, the rear fixing assembly and the connecting bottom plate are connected through flanges.

Compared with the prior art, the utility model discloses following beneficial effect has: the device has simple structure and reasonable design, and ensures that the stress of the sliding frame is uniform as much as possible in the movement process of the sliding frame in the main lens cone by properly changing the structural forms of the zooming sliding frame and the compensating sliding frame in the large-caliber zooming system so as to ensure the stability of the optical system in the whole continuous zooming process; simultaneously, a zooming and compensating curve groove is additionally arranged on the excircle of the zooming cam and is connected with the sliding frame through a guide nail, the zooming and compensating sliding frame has the function of assisting in supporting the zooming system to further ensure the stability of the zooming process, the zooming and compensating sliding frame adopts a 4-claw structural form, so that the loads are uniformly distributed in the moving process of the zooming and compensating sliding frame in the main lens cone, and meanwhile, the zooming curve groove and the compensating curve groove are additionally arranged on the zooming cam to assist in driving the zooming sliding frame and the compensating sliding frame, so that the loads are further uniformly distributed.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

FIG. 2 is a perspective view of an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a focusing assembly in accordance with an embodiment of the present invention;

FIG. 4 is a perspective view of a focusing assembly according to an embodiment of the present invention;

FIG. 5 is a side view of a focusing assembly in accordance with an embodiment of the present invention;

FIG. 6 is an elevation view of a focusing assembly in accordance with an embodiment of the present invention;

fig. 7 is a perspective view of a zoom assembly according to an embodiment of the present invention;

figure 8 is a side view of a zoom assembly in accordance with an embodiment of the present invention;

figure 9 is a cross-sectional view of a zoom assembly in accordance with an embodiment of the present invention;

in the figure: 1-a focusing assembly; 11-focusing group lens; 12-a focus lens barrel; 13-a focusing guide pin assembly; 14-a focusing cam; 15-a focus-adjusting main barrel; 16-focusing cam teeth, 17-first microswitch; 18-a focus motor gear; 19-focusing potentiometer gear; 110-a focus motor; 111-a focusing potentiometer; 112-a focusing motor mount; 113-focusing potentiometer frame; 114-focus cam slot; 2-a zoom assembly; 21-zooming potentiometer frame; 22-a variable-magnification potentiometer; 23-a zoom potentiometer gear; 24-a zooming motor frame; 25-a zoom motor; 26-a zoom motor gear; 27-a zoom limit bracket; 28-a second microswitch; 29-variable power group lenses; 210-a zoom lens barrel; 211-zooming guide pin assembly; 212-zoom carriage; 213-main barrel; 214-a zoom cam; 215-compensation group lens; 216-a compensation barrel; 217-compensation carriage; 218-connecting the backplane; 219-zooming curve slot; 220-compensation curve slot; 221-variable magnification cam teeth; 3-rear fixing component.

Detailed Description

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

Example (b): referring to fig. 1 to 9, in this embodiment, a zoom structure of a large-aperture high-zoom-ratio zoom lens is provided, which includes a lens structure, and the lens structure includes, from left to right, a focusing assembly 1, a zooming assembly 2, and a rear fixing assembly 3, which are sequentially disposed.

In this embodiment, the focusing assembly 1 includes a focusing cam 14, a focusing main barrel 15 and a focusing barrel 12, which are sequentially arranged from outside to inside, the focusing barrel is internally installed with a focusing lens 11, the focusing main barrel is provided with a straight track straight slot, the focusing cam is provided with a focusing cam slot, the focusing barrel is provided with a focusing guide pin assembly 13, the focusing guide pin assembly passes through the straight track straight slot and extends into the focusing cam slot 114, and the focusing cam is in running fit with the focusing main barrel to drive the focusing barrel to do regular back-and-forth linear motion in the focusing main barrel through the focusing guide pin assembly.

The focusing main lens barrel is externally provided with a focusing motor 110, a focusing potentiometer 111 and two first micro switches 17, the two first micro switches are respectively positioned at two ends of a focusing cam groove, the focusing potentiometer is connected with the focusing main lens barrel through a focusing potentiometer frame 113, the focusing motor is connected with the focusing main lens barrel through a focusing motor frame 112, a focusing cam tooth part 16 is arranged outside the right side of the focusing cam, the output end of the focusing motor is provided with a focusing motor gear 18 engaged with the focusing cam tooth part, and the output end of the focusing potentiometer is provided with a focusing potentiometer gear 19 also engaged with Jiao Chibu.

The focusing motor 110 drives the focusing cam 14 to make circular motion on the focusing main barrel 15 and drives the focusing lens barrel 12 to make regular reciprocating linear motion in the focusing main barrel 15 under the limitation of a linear track straight slot of the focusing main barrel 15 through the focusing guide pin assembly 13.

The above-described focus cam 14 is provided with first microswitch 17 protection at both ends of the focus cam groove 114.

The focusing potentiometer 111 performs input and output of the focusing amount through the control board after sampling at an appropriate stepping point.

The focusing lens set adjusts the air space through the corresponding focusing space ring and is locked by the focusing pressing ring.

The focusing lens barrel is arranged in the focusing main lens barrel by controlling a matching gap through manual grinding; the focusing main lens barrel controls the gap between the focusing cams through steel balls and is locked by a focusing cam pressing ring to form a ball bearing structure.

The focusing guide pin assembly is connected with the focusing lens barrel in a threaded manner, and a first focusing roller and a second focusing roller are arranged on the focusing guide pin assembly and are respectively matched with a straight track straight groove on the focusing main lens barrel and a focusing cam groove on the focusing cam through a grinding control gap.

The focusing lens barrel and the focusing cam are respectively arranged in the focusing main lens barrel after being matched with the focusing main lens barrel in a grinding way, the focusing cam mills a linear chute to form a focusing cam groove according to the requirement of an optical system on the focusing amount, and the focusing main lens barrel mills a linear track straight groove; when the focusing of far and near targets is finished, the focusing potentiometer gear drives the focusing potentiometer shaft to rotate by meshing with the focusing cam tooth part, so that the resistance value of the focusing potentiometer changes, the change value of the focusing potentiometer can be read out through a proper sampling circuit and is transmitted to a control center, and the display of the focusing distance value is realized; on the contrary, the real-time control of the focusing distance value can be realized by giving a command through the control center.

In this embodiment, the zoom assembly 2 includes a main barrel 213, a zoom assembly disposed inside the left side of the main barrel, and a compensation assembly disposed inside the right side of the main barrel, a zoom cam 214 is disposed outside the main barrel, the zoom assembly includes a zoom carriage 212, a zoom barrel 210, and a zoom group lens 29 installed inside the zoom barrel, which are sequentially disposed from outside to inside, and the zoom group lens 29 is disposed inside the zoom barrel 210 at an interval by adjusting air through a spacer and locked by a pressing ring.

The compensation assembly comprises a compensation sliding frame 217, a compensation lens barrel 216 and a compensation group lens 215, wherein the compensation sliding frame 217, the compensation lens barrel 216 and the compensation group lens are sequentially arranged from outside to inside, a straight groove is formed in the main lens barrel, a zooming curve groove 219 and a compensation curve groove 220 which have an optical zooming relation are respectively processed on two sides of the zooming cam, a zooming guide pin assembly 211 which penetrates through the straight groove and extends into the zooming curve groove is arranged on the zooming sliding frame, and a compensation guide pin assembly which penetrates through the straight groove and extends into the compensation curve groove is arranged on the compensation sliding frame.

The zoom lens barrel and the compensation lens barrel are respectively arranged on the zoom sliding frame and the compensation sliding frame.

The variable-power nail guiding component 211 and the compensation nail guiding component are matched with the straight groove of the main lens barrel, the variable-power curve groove 219 and the compensation curve groove 220, and are finally locked on the variable-power and compensation sliding frame in a threaded connection mode.

The outer side of the zooming cam is provided with a zooming motor 25, the outer part of the left side of the zooming cam is provided with a zooming cam tooth part 221, and the output end of the zooming motor is provided with a zooming motor gear 26 engaged with the zooming cam tooth part. The zooming motor is arranged on the upper side part of the connecting bottom plate through a zooming motor frame 24.

The end points of the two sides of the zooming curve slot and the compensation curve slot are provided with second micro switches 28 for in-place power-off protection of the mechanism. The second microswitch is arranged on the upper side part of the connecting bottom plate through a zooming limit bracket 27.

The outside of the variable-magnification cam is also provided with a variable-magnification potentiometer 22, and the output end of the variable-magnification potentiometer is provided with a variable-magnification potentiometer gear 23 which is meshed with the variable-magnification cam gear. The zooming potentiometer is installed on the upper side part of the connecting bottom plate through a zooming potentiometer frame 21.

The zoom potentiometer 22 performs input and output of focal length through the control board after appropriate stepping point sampling.

The variable power lens 29 is arranged in the variable power lens barrel 210 by adjusting the air space through the variable power spacer ring and locked by the variable power pressing ring.

The zoom carriage 212 and the compensation carriage 217 are arranged in the main barrel 213 by controlling the fit clearance through manual grinding;

the variable magnification cam 214 described above forms a ball bearing mechanism by a steel ball and a variable magnification cam pressing ring.

The zooming motor 25 drives the zooming motor gear 26 to drive the zooming cam 214 to do circular motion, and the zooming cam 214 drives the zooming and compensating carriage to do corresponding reciprocating linear motion under the limitation of the straight groove of the main lens barrel through the circular motion, so that the position relation required by optical zooming is met.

The zooming sliding frame and the compensating sliding frame are matched in the middle of the main lens cone in a sliding mode along the axial direction, and the zooming cam drives the zooming sliding frame and the compensating sliding frame to move back and forth along the axial direction through the zooming guide pin component and the compensating zooming guide pin component respectively.

In this embodiment, a connection bottom plate 218 is disposed below the lens structure, and the focusing assembly, the zooming assembly, the rear fixing assembly and the connection bottom plate are all flange-connected, so that a cantilever phenomenon is reduced as much as possible spatially, the overall natural frequency is reduced substantially structurally, local amplitude superposition and the like are prevented, and the overall anti-vibration strength is effectively improved.

Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effects which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.

Also, above-mentioned the utility model discloses if disclose or related to mutually fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.

In addition, the terms used in any technical aspect of the present disclosure as described above for indicating the positional relationship or the shape include the state or the shape similar, analogous or approaching thereto unless otherwise stated.

The utility model provides an arbitrary part both can be formed by a plurality of solitary component parts equipment, also can be for the solitary part that the integrated into one piece technology made out.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims

1. The utility model provides a heavy-calibre, high zoom ratio zoom structure of continuous zoom, a serial communication port, including the camera lens structure, focusing subassembly, the back fixed subassembly that the camera lens structure set gradually from left to right, the focusing subassembly includes from outer to interior focusing cam, focusing main barrel and the focusing lens cone that sets gradually, install focusing group lens in the focusing lens cone, be equipped with the straight line orbit straight flute on the focusing main barrel, be equipped with the focusing cam groove on the focusing cam, it leads nail subassembly to be equipped with the focusing on the focusing lens cone, the focusing is led nail subassembly and is passed inside the straight line orbit straight flute extends to the focusing cam groove, focusing cam and focusing main barrel normal running fit for lead the nail subassembly through the focusing and drive the reciprocating linear motion that the focusing lens cone was the rule in the main barrel.

2. The structure of claim 1, wherein a focusing motor, a focusing potentiometer and two first microswitches are disposed outside the focusing main barrel, the two first microswitches are respectively disposed at two ends of the focusing cam slot, the focusing potentiometer is connected to the focusing main barrel through a focusing potentiometer frame, the focusing motor is connected to the focusing main barrel through a focusing motor frame, a focusing cam tooth portion is disposed outside a right side of the focusing cam, a focusing motor gear engaged with the focusing cam tooth portion is disposed at an output end of the focusing motor, and a focusing potentiometer gear also engaged with Jiao Chibu is disposed at an output end of the focusing potentiometer.

3. The structure of claim 1, wherein the zoom assembly comprises a main barrel, a zoom assembly disposed inside the left side of the main barrel, and a compensation assembly disposed inside the right side of the main barrel, the main barrel is externally provided with a zoom cam, the zoom assembly comprises a zoom carriage, a zoom barrel, and zoom group lenses installed inside the zoom barrel, the compensation assembly comprises a compensation carriage, a compensation barrel, and compensation group lenses installed inside the compensation barrel, the zoom carriage and the compensation barrel are sequentially disposed from outside to inside, the main barrel is provided with a straight slot, the two sides of the zoom cam are respectively provided with a zoom curved slot and a compensation curved slot, the zoom carriage is provided with a zoom guide pin assembly extending into the zoom curved slot through the straight slot, and the compensation carriage is provided with a compensation guide pin assembly extending into the compensation curved slot through the straight slot.

4. A zoom structure of a large-aperture high-zoom-ratio zoom lens as claimed in claim 3, wherein the outside of the zoom cam is provided with a zoom motor, the outside of the left side of the zoom cam is provided with a tooth portion of the zoom cam, and the output end of the zoom motor is provided with a gear of the zoom motor for engaging with the tooth portion of the zoom cam.

5. A structure as claimed in claim 3, wherein the second micro-switches are disposed at the end points of the two sides of the zooming curve slot and the compensation curve slot for protecting the mechanism from power failure.

6. A large caliber high magnification ratio zoom lens structure according to claim 3, wherein the outside of the zoom cam is further provided with a zoom potentiometer, and the output end of the zoom potentiometer is provided with a zoom potentiometer gear engaged with the teeth of the zoom cam.

7. The structure of claim 1, wherein a connecting base plate is disposed below the lens structure, and the focusing assembly, the zooming assembly, the rear fixing assembly and the connecting base plate are connected by flanges.