CN206450890U - High magnification optical zoom lens - Google Patents

Abstract

The utility model discloses a high magnification optical zoom lens, which comprises a lens body, wherein the lens body comprises at least one group of lens group modules which are arranged on the lens body in a sliding way and a zooming driving mechanism which can drive the lens group modules to move, the zooming driving mechanism comprises a rotating driving device and a rotating part driven by the rotating driving device, a chute corresponding to the lens group modules is arranged on the rotating part, a sliding pin which can extend into the chute is arranged on the lens group modules, when the rotating part rotates, the chute slides relative to the sliding pin and drives the lens group modules to slide and focus through the sliding pin, the structure is simple and reasonable, the reliability is high, the optical design is simple, the production is easy, the manufacturing cost is reduced, the adjustment of focal length can be realized by adjusting the inclination of the chute, the stepless adjustment is realized, the zooming magnification is large, and the zooming magnification reaches more than 5.5 times, meanwhile, the wide-range visual angle change switching can be realized, and the shooting requirements of telephoto and wide angle are met.

Description

High magnification optical zoom lens

technical field

The utility model relates to a photographic equipment, in particular to a high-magnification optical zoom lens.

Background technique

Cameras, video cameras and other photographic or video equipment are usually equipped with lenses. Except for special fixed-focus shooting requirements, they are usually equipped with zoom lenses to adjust the zoom ratio and imaging angle. At present, most common zoom lenses use rotating rings and helical lenses. The cooperation of the slots is realized, and the driving device is built into the rotating ring, so the structure is complex, the cost is high, and the assembly is difficult.

Contents of the invention

In order to overcome the shortcomings of the prior art, the utility model provides a high-magnification optical zoom lens with simple structure and low manufacturing cost.

The technical scheme that the utility model solves its technical problem adopts is:

The high-magnification optical zoom lens includes a lens body, and the lens body includes at least one set of lens group modules that are slidably arranged on the lens body and a zoom drive mechanism that can drive the lens group modules to move, and the zoom drive mechanism includes a rotation drive device and a rotating member driven by a rotating drive device, the rotating member is provided with a chute corresponding to the mirror group module, the mirror group module is provided with a sliding pin that can extend into the chute, and the rotating member rotates At this time, the chute slides relative to the sliding pin and drives the lens group module to slide and adjust the focus through the sliding pin.

The rotating part is a cam or fan-shaped structure, and the slide groove is set away from the center of the rotating part.

The mirror group module is configured with two groups, namely the first mirror group module and the second mirror group module;

The chute is configured with two groups, which are a first chute and a second chute respectively corresponding to the first mirror group module and the second mirror group module.

The two ends of the chute are the near end and the far end respectively, and the distance between the first chute and the second chute gradually increases from the near end to the far end.

The rotation driving device is a motor mechanism, the rotation angle range of the motor mechanism is 60°, and the angle between the near end and the far end of the chute relative to the rotation center of the motor mechanism is greater than or equal to 60°.

The near end and the far end of the chute have an overtravel angle of 5° relative to the limit rotation position of the motor mechanism.

The chute is an arc groove.

The first lens group module includes a first lens barrel and a first lens group arranged in the first lens barrel, and the second lens group module includes a second lens barrel and a second lens arranged in the second lens barrel The lens body also includes a base and an outer lens barrel arranged on the base, the first lens group module and the second lens group module are arranged in the outer lens barrel, and a plurality of guide shafts are arranged on the base. The first lens barrel and the second lens barrel are respectively provided with guide holes slidingly fitted with the guide shafts.

The slide pins include first slide pins and second slide pins respectively provided on the first lens barrel and the second lens barrel.

The beneficial effects of the utility model are: the high-magnification optical zoom lens includes a lens body, and the lens body includes at least one set of lens group modules slidably arranged on the lens body and a zoom drive mechanism capable of driving the lens group modules to move. The zoom drive mechanism includes a rotating drive device and a rotating member driven by the rotating drive device. The rotating member is provided with a chute corresponding to the mirror group module. The mirror group module is provided with a chute that can extend into the chute Sliding pin, when the rotating member rotates, the chute slides relative to the sliding pin and drives the lens group module to slide and adjust the focus through the sliding pin, the structure is simple and reasonable, the reliability is high, the optical design is simple, easy to produce, and the manufacturing cost is reduced , and the adjustment of the focal length can be realized by adjusting the slope of the chute, stepless and stepless adjustment, the zoom ratio is large, reaching more than 5.5 times, and at the same time, it can realize a wide range of viewing angle changes and switching to meet the shooting requirements of telephoto and wide-angle.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the exploded schematic view of the utility model;

Fig. 3 is a structural schematic diagram of the utility model when the rotary drive device rotates clockwise to the limit position;

Fig. 4 is a schematic diagram of the structure of the rotary driving device of the present invention when it rotates counterclockwise to the extreme position.

detailed description

Referring to Fig. 1 to Fig. 4, Fig. 1 to Fig. 4 is a structural schematic view of a specific embodiment of the present invention, as shown in the figure, the high-magnification optical zoom lens includes a lens body, and the lens body includes at least one set of sliding settings The lens group module on the lens body and the zoom drive mechanism capable of driving the lens group module to move, the zoom drive mechanism includes a rotating drive device and a rotating member 31 driven by the rotating drive device, and the rotating member 31 is provided with The chute corresponding to the mirror group module. The mirror group module is provided with a sliding pin that can extend into the chute. When the rotating member 31 rotates, the chute slides relative to the sliding pin and drives the mirror group through the sliding pin. The module slides the focus, the structure is simple and reasonable, the reliability is high, the optical design is simple, easy to produce, and reduces the manufacturing cost, and the adjustment of the focal length can be realized by adjusting the slope of the chute, stepless and stepless adjustment, and the zoom ratio is large. It can reach more than 5.5 times, and at the same time, it can realize a wide range of viewing angle switching, meeting the shooting requirements of telephoto and wide-angle.

In the utility model, the mirror group modules can be configured as a group, and can be used in conjunction with a fixed mirror group, and can also perform the function of zooming.

Preferably, in this embodiment, the mirror group modules are configured with two groups, namely the first mirror group module and the second mirror group module; , the first chute 311 and the second chute 312 corresponding to the second lens group module, so as to realize the adjustment of the distance between the first lens group module and the second lens group module, thereby realizing the adjustment of focus and viewing angle.

Preferably, the two ends of the chute are the near end and the far end respectively, and the distance between the first chute 311 and the second chute 312 gradually increases from the near end to the far end, so that the two groups of near ends The sliding pins of the mirror group modules can slide to the near end or the far end at the same time, so as to realize the linear adjustment of the distance between the first mirror group module and the second mirror group module.

Preferably, the first lens group module includes a first lens barrel 11 and a first lens group 12 arranged in the first lens barrel 11, and the second lens group module includes a second lens barrel 21 and a first lens group 12 arranged in the second lens barrel 11. The second lens group 22 in the lens barrel 21, the lens body also includes a base 41 and an outer lens barrel 42 arranged on the base 41, the first lens group module and the second lens group module are arranged in the outer lens barrel 42 , the base 41 is provided with a number of guide shafts 43, the first lens barrel 11 and the second lens barrel 21 are respectively provided with guide holes 44 that are slidably fitted with the guide shafts 43, and the sliding pins include The first sliding pin 13 and the second sliding pin 23 on the first lens barrel 11 and the second lens barrel 21 are provided with holes on the outer lens barrel 42 for the first sliding pin 13 and the second sliding pin 23 to protrude from, The first sliding pin 13 and the second sliding pin 23 cooperate with the first sliding groove 311 and the second sliding groove 312 respectively, so as to realize the sliding adjustment of the first lens barrel 11 and the second lens barrel 21 .

As shown in the figure, a sensor 411 is disposed on the base 41. In the present invention, the lenses of the first lens group 12 and the second lens group 22 are designed based on the specific chief ray incident angle range of the sensor 411, That is to say, the optical design of the lens group satisfies the angle range of the forming chief ray at each zoom end, ensuring that there will be no local uneven luminosity on the imaging surface.

Preferably, in this embodiment, the first lens group 12 and the second lens group 22 are double-lens lens groups, and the double-lens lenses can be spaced double-lens lenses or a combination of cemented double-lens lenses, and are pressed by pressing Tightly fit into the corresponding lens barrel.

Preferably, in this embodiment, each lens group includes two groups of aspheric or aspheric/diffractive element composite optical lenses glued together to form an achromatic optical lens group.

Preferably, in this embodiment, an infrared cut-off filter 412 is disposed in front of the sensor 411, and the infrared cut-off filter 412 is arranged at a position where the incident angle of the light in different zoom segments changes the least, and the infrared cut-off filter 412 passes through the infrared cut-off filter. 412 can effectively prevent any residual dust in the lens barrel from falling on the surface of the sensor, resulting in bad black dot images.

Further, the infrared cut-off filter 412 is provided with a multi-layer film system, benefiting from a small incident angle of light, which can effectively reduce the number of layers of the film system, and also obtain an effective filtering effect.

Preferably, in this embodiment, the rotation driving device is a motor mechanism 30, the rotating member 31 is a cam or fan-shaped structure, and the chute is set away from the center of the rotating member 31. Preferably, in this embodiment In an example, the chute is an arc-shaped groove, and the center of the arc-shaped slit deviates from the rotation center of the motor mechanism 30 , so that when the sliding pin and the chute slide relative to each other, the sliding pin and the mirror group module can be driven to slide back and forth.

Certainly, in the specific implementation process, the said rotary drive device can be a manual rotary device, a steering gear, a servo motor, a combination of a motor and a sensor, or a combination of a motor and a transmission, etc., which can also realize the rotary drive function. In addition, the The chute can also be set as a linear groove, a parabolic groove or the like, which will not be described in detail here.

Preferably, in this embodiment, the rotation angle range of the motor mechanism 30 is 60°, that is, the rotation angle of the motor mechanism 30 is ±60 degrees, and the near end and the far end of the chute are relative to the rotation center of the motor mechanism 30. The included angle is greater than or equal to 60°.

Preferably, as shown in the figure, in this embodiment, the near end and the far end of the chute have an overtravel angle of 5° relative to the limit rotation position of the motor mechanism 30, so as to prevent the motor mechanism 30 from overtraveling. As a result, the sliding pin collides with the chute and damages the entire adjustment structure, improving the reliability of the mechanism.

In this embodiment, the zoom ratio is designed to be 5.5X, the aperture is F/2.8-F/4, and the shooting angle is 110° to 29°. The zoom effect can be achieved by configuring two groups of movable mirror modules. , as shown in Figure 3, Figure 3 is a schematic diagram of the position of the first sliding pin 13 and the second sliding pin 23 when the motor mechanism 30 of the present invention rotates clockwise to -60°, in Figure 3, the first mirror group module The distance from the second lens group module is the farthest. At this time, the focal length becomes smaller and the viewing angle becomes larger. In this embodiment, the viewing angle is 110°, which realizes the effect of wide-angle shooting; as shown in Figure 4, Figure 4 is the When the motor mechanism 30 of the utility model rotates counterclockwise to 60°, the schematic diagram of the position of the first sliding pin 13 and the second sliding pin 23. In FIG. 4, the distance between the first mirror group module and the second mirror group module is the closest. At this time, The focal length becomes larger, and the viewing angle becomes smaller at the same time. In this embodiment, the viewing angle is 29°, and the zoom ratio is 5.5X, which achieves the shooting effect of telephoto zoom.

The preferred implementation of the present utility model has been specifically described above. Of course, the present utility model can also adopt forms different from the above-mentioned embodiments, and those skilled in the art can make equivalent transformations or modifications without violating the spirit of the present invention. Corresponding changes should all belong to the protection scope of the present utility model.

Claims (9)

1. high magnification Zoom optic lens, including camera lens body, it is characterised in that：The camera lens body includes at least one set of cunning The dynamic microscope group module being arranged on camera lens body and the zoom drive mechanism that microscope group module can be driven to move, the zoom drive Mechanism includes a device of rotation driving and a tumbler driven by device of rotation driving（31）, the tumbler（31）On open up Have and be provided with the sliding pin that can extend into chute, the tumbler in chute corresponding with microscope group module, the microscope group module （31）During rotation, chute slip relative with sliding pin simultaneously drives microscope group module to slide focusing by sliding pin.

2. high magnification Zoom optic lens according to claim 1, it is characterised in that：The tumbler（31）For a cam Or sector structure, the chute deviation tumbler（31）It is centrally disposed.

3. high magnification Zoom optic lens according to claim 1 or 2, it is characterised in that：

The microscope group module is configured with two groups, respectively the first microscope group module and the second microscope group module；

The chute is configured with two groups, for the first chute corresponding with the first microscope group module, the second microscope group module respectively（311）、 Second chute（312）.

4. high magnification Zoom optic lens according to claim 3, it is characterised in that：The two ends of the chute are respectively phase Near-end and remote end, the first chute（311）With the second chute（312）Between spacing distance by phase near-end to away from end gradually increase Greatly.

5. high magnification Zoom optic lens according to claim 4, it is characterised in that：The device of rotation driving is an electricity Machine mechanism（30）, the motor mechanism（30）Angle range be 60 °, the phase near-end of the chute and away from end relative to motor Mechanism（30）The angle of center of rotation is more than or equal to 60 °.

6. high magnification Zoom optic lens according to claim 5, it is characterised in that：The phase near-end of the chute and remote End is relative to motor mechanism（30）Extreme rotational position there is 5 ° of excess of stroke angle.

7. high magnification Zoom optic lens according to claim 3, it is characterised in that：The chute is a deep-slotted chip breaker.

8. high magnification Zoom optic lens according to claim 3, it is characterised in that：The first microscope group module includes the One lens barrel（11）And it is arranged on the first lens barrel（11）The first interior microscope group（12）, the second microscope group module include the second lens barrel （21）And it is arranged on the second lens barrel（21）The second interior microscope group（22）, the camera lens body is also including a base（41）And be arranged on Base（41）Upper outer lens barrel（42）, the first microscope group module and the second microscope group module are arranged on outer lens barrel（42）It is interior, the bottom Seat（41）On be provided with some axis of guides（43）, first lens barrel（11）With the second lens barrel（21）It is upper to offer and be oriented to respectively Axle（43）The pilot hole being slidably matched（44）.

9. high magnification Zoom optic lens according to claim 8, it is characterised in that：The sliding pin includes setting respectively In the first lens barrel（11）With the second lens barrel（21）On the first sliding pin（13）With the second sliding pin（23）.