CN220207969U

CN220207969U - Focusing lens

Info

Publication number: CN220207969U
Application number: CN202320771483.XU
Authority: CN
Inventors: 鲍海江; 黄文俊; 高博; 李伟娜
Original assignee: Zhongshan Liantuo Optical Co ltd
Current assignee: Zhongshan Liantuo Optical Co ltd
Priority date: 2023-04-08
Filing date: 2023-04-08
Publication date: 2023-12-19
Anticipated expiration: 2033-04-08

Abstract

The utility model relates to the technical field of lenses, in particular to a focusing lens. The focusing lens comprises a lens seat, a focusing cylinder, a driving mechanism and a position sensor, wherein the focusing cylinder is connected to the lens seat and can axially move relative to the lens seat, the driving mechanism is connected with the focusing cylinder and used for driving the focusing cylinder to move, and the position sensor is used for detecting the position of the focusing cylinder. According to the utility model, the focusing cylinder is driven to move through the driving mechanism so as to focus, and the position of the focusing cylinder is determined through the position sensor so as to accurately focus; the utility model has simple structure, reliable technology, small volume and light weight, and is particularly suitable for being used on products with particularly strict weight requirements; the utility model adopts the reflector turn-back technology, reduces the volume, reduces the using space of the lens, and achieves the purposes of weight reduction and space saving for some unmanned aerial vehicles and other projects.

Description

Focusing lens

Technical Field

The utility model relates to the technical field of lenses, in particular to a focusing lens.

Background

Optical zoom is produced by the change in position of the lens, object and focus. When the imaging surface moves in the horizontal direction, vision and focal length change, and a scene farther away becomes clearer, so that people feel like an object progressive feeling. It is apparent that the focal length of the lens can be changed to change the angle of view. With photography, this is optical zoom. The focal length of the lens is changed by changing the relative position of each lens in the zoom lens. The focusing structure design of the lens is various, and common structures comprise threads, a straight groove cylinder, a CAM cylinder, a straight groove cylinder and the like. The screw thread and straight groove drum are common focusing structures, and the device has the advantages of simple structure, low cost, easiness in processing and the like. The CAM cylinder and the straight groove cylinder have the advantages of low cost, simple assembly and the like.

The above-mentioned focusing structure is generally zoomed through manual regulation mode, and focusing is inconvenient enough, and in addition, camera lens overall structure is great, can't satisfy miniaturized demand.

Disclosure of Invention

The utility model aims to at least solve one of the technical problems in the prior art and provides a focusing lens.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a focusing lens, includes lens holder, focusing section of thick bamboo, actuating mechanism, position sensor, the focusing section of thick bamboo is connected on the lens holder and can be relative lens holder axial displacement, actuating mechanism is connected with the focusing section of thick bamboo for drive the focusing section of thick bamboo and remove, position sensor is used for detecting the position of focusing section of thick bamboo.

Further, the lens base comprises a transverse axis lens base and a vertical axis lens base, the transverse axis lens base is perpendicular to the vertical axis lens base, and the focusing cylinder is arranged on the transverse axis lens base.

Further, a first lens group is arranged in the focusing barrel, and a second lens group is arranged in the vertical axis lens seat.

Further, a reflecting mirror is arranged between the horizontal axis mirror seat and the vertical axis mirror seat, the reflecting mirror is used for turning an optical path, and an optical axis of the first mirror group is overlapped with an optical axis of the second mirror group after being turned by the reflecting mirror.

Further, a placing groove for placing the reflecting mirror is formed in the mirror base.

Further, a sensing point matched with the position sensor is arranged on the focusing cylinder.

Further, the position sensor is a photoelectric positioning sensor.

Further, the driving mechanism comprises a driving motor, a screw rod and a screw rod connecting claw, wherein the driving motor is arranged on the lens seat and used for driving the screw rod to rotate, the screw rod is matched with the screw rod connecting claw and used for driving the screw rod connecting claw to axially move along the focusing barrel, and the screw rod connecting claw is arranged on the focusing barrel.

Further, the driving motor is a stepping motor.

Further, the screw rod connecting claw is a triangular claw, and threads meshed with the screw rod are arranged on the triangular claw.

As can be seen from the above description of the present utility model, compared with the prior art, the focusing lens of the present utility model at least includes one of the following advantages:

according to the utility model, the focusing cylinder is driven to move through the driving mechanism so as to focus, and the position of the focusing cylinder is determined through the position sensor so as to accurately focus;

the utility model has simple structure, reliable technology, small volume and light weight, and is particularly suitable for being used on products with particularly strict weight requirements;

the utility model adopts the reflector turn-back technology, reduces the volume, reduces the use space of the lens, and achieves the purposes of weight reduction and space saving for some unmanned aerial vehicles and other projects;

the utility model uses a unique screw rod fixing triangle claw technology, has a more stable structure, plays a role in preventing screw rods from locking, prevents the lens barrel screw teeth from being broken, does not block movement, and ensures that the screw rods are more smoothly adjusted and have longer service life.

Drawings

FIG. 1 is an exploded view of a focus lens according to a preferred embodiment of the present utility model;

FIG. 2 is a schematic view of a focusing lens according to a preferred embodiment of the present utility model;

FIG. 3 is a schematic view of a focusing barrel according to a preferred embodiment of the present utility model;

the reference numerals in the figures illustrate: 1. a lens base; 2. a focusing barrel; 3. a driving mechanism; 4. a position sensor; 5. a first lens group; 6. a second lens group; 11. a cross-axis lens base; 12. a vertical axis mirror base; 13. a reflecting mirror; 21. sensing points; 31. a driving motor; 32. a screw rod; 33. the screw rod is connected with the claw.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-3, a focusing lens of a preferred embodiment of the present utility model comprises a lens holder 1, a focusing barrel 2, a driving mechanism 3, and a position sensor 4, wherein the focusing barrel 2 is connected to the lens holder 1 and can move axially relative to the lens holder 1, the driving mechanism 3 is connected to the focusing barrel 2 for driving the focusing barrel 2 to move, and the position sensor 4 is used for detecting the position of the focusing barrel 2.

The utility model drives the focusing cylinder 2 to move through the driving mechanism 3 so as to focus, and the position of the focusing cylinder 2 is determined through the position sensor 4 so as to accurately focus; the utility model has simple structure, reliable technology, small volume and light weight, and is particularly suitable for being used on products with particularly strict weight requirements; the utility model adopts the reflector 13 turning-back technology, reduces the volume, reduces the use space of the lens, and achieves the purposes of reducing weight and saving space for some unmanned aerial vehicles and other projects; the utility model uses a unique technology of fixing the triangular claw by the screw rod 32, has a more stable structure, plays a role in preventing the screw rod 32 from locking, prevents the lens barrel screw teeth from being damaged by disorder teeth, does not cause the movement to be blocked, and ensures that the screw rod 32 is more smoothly regulated and has longer service life.

As a preferred embodiment of the utility model, it may also have the following additional technical features:

in this embodiment, the lens base 1 includes a horizontal axis lens base 11 and a vertical axis lens base 12, the horizontal axis lens base 11 is perpendicular to the vertical axis lens base 12, and the focusing barrel 2 is disposed on the horizontal axis lens base 11. The lens base 1 is arranged into a turning type lens barrel structure of a transverse axis lens base 11 and a vertical axis lens base 12 so as to reduce the length of a lens and realize the miniaturization requirement, and the focusing barrel 2 is arranged on the transverse axis lens base 11 so as to focus.

In this embodiment, the focusing barrel 2 is provided with a first lens group 5, and the vertical axis lens base 12 is provided with a second lens group 6. The focusing cylinder 2 and the first lens group 5 and the second lens group 6 in the vertical axis lens seat 12 are responsible for imaging.

In this embodiment, a reflecting mirror 13 is disposed between the horizontal axis mirror seat 11 and the vertical axis mirror seat 12, the reflecting mirror 13 is used for turning an optical path, and an optical axis of the first lens group 5 is turned by the reflecting mirror 13 and then coincides with an optical axis of the second lens group 6. The reflecting mirror 13 is arranged between the transverse axis mirror seat 11 and the vertical axis mirror seat 12 to realize the turning of the light path, so that the optical axes of the first mirror group 5 and the second mirror group 6 are overlapped.

In this embodiment, a placement groove for placing the reflecting mirror 13 is provided in the mirror base 1. The mirror 13 is placed by a placement groove to fix the mirror 13.

In this embodiment, the focusing barrel 2 is provided with a sensing point 21 cooperating with the position sensor 4. The sensing point 21 and the position sensor 4 are arranged on the focusing barrel 2 to sense so as to determine the position of the focusing barrel 2, and specifically, the sensing point 21 is the origin position.

In this embodiment, the position sensor 4 is a photoelectric positioning sensor. And the photoelectric positioning sensor is adopted for positioning, so that the positioning is more sensitive.

In this embodiment, the driving mechanism 3 includes a driving motor 31, a screw rod 32, and a screw rod connection claw 33, where the driving motor 31 is disposed on the lens base 1 and is used to drive the screw rod 32 to rotate, the screw rod 32 is matched with the screw rod connection claw 33 and is used to drive the screw rod connection claw 33 to move along the axial direction of the focusing barrel 2, and the screw rod connection claw 33 is disposed on the focusing barrel 2. The driving mechanism 3 drives the screw rod 32 to rotate through the driving motor 31, and then drives the screw rod connecting claw 33 to axially move so as to drive the focusing cylinder 2 to axially move, and the position of the focusing cylinder 2 is adjusted to finish focusing.

In this embodiment, the driving motor 31 is a stepping motor. The high-precision miniature stepping motor is used for controlling the lens barrel to move within the range of +/-0.5 mm, so that the zoom adjustment of the object distance from 1m to infinity can be realized.

In this embodiment, the screw connecting claw 33 is a triangular claw, and a thread engaged with the screw 32 is provided on the triangular claw. The screw rod connecting claw 33 is a triangular claw, and a unique screw rod 32 triangular claw fixing technology is used, so that the structure is more stable, the screw rod 32 is anti-lock, the lens barrel screw teeth are prevented from being broken, the movement cannot be blocked, the screw rod 32 is adjusted more smoothly, and the service life is longer

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical solution and the modified concept thereof, within the scope of the present utility model.

Claims

1. A focusing lens, characterized in that: the device comprises a lens seat (1), a focusing barrel (2), a driving mechanism (3) and a position sensor (4), wherein the focusing barrel (2) is connected to the lens seat (1) and can axially move relative to the lens seat (1), the driving mechanism (3) is connected with the focusing barrel (2) and is used for driving the focusing barrel (2) to move, and the position sensor (4) is used for detecting the position of the focusing barrel (2).

2. The focus lens according to claim 1, wherein: the lens seat (1) comprises a transverse axis lens seat (11) and a vertical axis lens seat (12), the transverse axis lens seat (11) is perpendicular to the vertical axis lens seat (12), and the focusing cylinder (2) is arranged on the transverse axis lens seat (11).

3. A focus lens according to claim 2, wherein: a first lens group (5) is arranged in the focusing barrel (2), and a second lens group (6) is arranged in the vertical axis lens seat (12).

4. A focus lens according to claim 3, wherein: a reflecting mirror (13) is arranged between the transverse axis mirror seat (11) and the vertical axis mirror seat (12), the reflecting mirror (13) is used for turning an optical path, and an optical axis of the first mirror group (5) is overlapped with an optical axis of the second mirror group (6) after being turned by the reflecting mirror (13).

5. The focus lens according to claim 4, wherein: a placing groove for placing the reflecting mirror (13) is arranged in the mirror base (1).

6. The focus lens according to claim 1, wherein: the focusing cylinder (2) is provided with a sensing point (21) matched with the position sensor (4).

7. The focus lens according to claim 1, wherein: the position sensor (4) is an optoelectronic positioning sensor.

8. The focus lens according to claim 1, wherein: the driving mechanism (3) comprises a driving motor (31), a screw rod (32) and a screw rod connecting claw (33), wherein the driving motor (31) is arranged on the lens base (1) and used for driving the screw rod (32) to rotate, the screw rod (32) is matched with the screw rod connecting claw (33) and used for driving the screw rod connecting claw (33) to axially move along the focusing barrel (2), and the screw rod connecting claw (33) is arranged on the focusing barrel (2).

9. The focus lens according to claim 8, wherein: the driving motor (31) is a stepping motor.

10. The focus lens according to claim 8, wherein: the screw rod connecting claw (33) is a triangular claw, and threads meshed with the screw rod (32) are arranged on the triangular claw.