CN220651039U - Zoom lens and imaging device - Google Patents

Abstract

The embodiment of the utility model relates to the technical field of optical imaging, and discloses a zoom lens and an imaging device. The zoom lens is connected with the rotating piece and the second lens seat through the transmission structure, and can convert the rotation of the rotating piece around the optical axis into the movement of the second lens seat along the optical axis direction, and when a user needs to adjust the focal length of the lens, the user only needs to rotate the rotating piece, and the adjusting process is simple, convenient and quick.

Description

Zoom lens and imaging device

Technical Field

The application belongs to the technical field of optical imaging, and particularly relates to a zoom lens and an imaging device.

Background

With the rapid development of industrial automation, machine vision has been widely used in the fields of manufacturing, quality inspection, logistics, medicine, scientific research, etc., and lenses have taken an important role as "eyes" of machine vision.

The existing lens can only move all lens groups at the same time to adjust the focal length, the partial lens groups cannot be adjusted, the flexibility of the lens is poor, the application range is small, the traditional lens is mainly adjusted in a mechanical adjustment mode at present, the distance between the lens groups of the lens is changed, the focal length adjustment of the lens is realized, but after the focal length of the lens is adjusted in a mechanical adjustment mode, each part is required to bear larger load, and irreversible structural damage is easily caused to the lens.

Disclosure of Invention

An object of the embodiment of the present application is to provide a zoom lens and an image pickup apparatus for solving the problem that the lens cannot be locked while adjusting a part of the lens group of the lens, resulting in unstable positions of the lens group.

To achieve the above object, according to one aspect of the present application, there is provided a zoom lens including:

a first lens base;

the second lens seat is positioned at the inner side of the first lens seat and is movably connected with the first lens seat along the optical axis;

the rotating piece is rotatably connected to the first lens seat around the optical axis;

the first end of the transmission structure is in driving connection with the rotating piece, the second end of the transmission structure is connected with the second lens seat, and the transmission structure is used for driving the second lens seat to move along the optical axis when the rotating piece rotates.

Optionally, the transmission structure includes the cam ring of connecting in the rotating member and connect in the guide post of second mirror seat, is provided with the guide way on the cam ring, and the guide post slides and sets up in the guide way.

Optionally, the first lens seat is provided with a waist-shaped groove, and the guide post is slidably arranged in the waist-shaped groove.

Optionally, a pressing ring is arranged on the first lens seat, the pressing ring and the first lens seat are surrounded to form a chute, and the cam ring is arranged in the chute in a sliding way.

Optionally, the plurality of transmission structures are provided, and the plurality of transmission structures are arranged at intervals along the circumferential direction of the second lens base.

Optionally, the rotating member is provided with a movable locking block, and the locking block may abut against the first lens seat.

Optionally, the rotating member is provided with a mounting hole, and the locking block is screwed in the mounting hole.

Optionally, the rotating member is provided with a plurality of scale marks along a circumferential direction of the first lens base, and the plurality of scale marks are arranged at intervals.

Optionally, the lens further comprises an elastic piece, wherein the first end of the elastic piece is connected to the first lens seat, and the second end of the elastic piece is connected to the second lens seat.

According to another aspect of the present utility model, there is also provided an image pickup apparatus including the zoom lens as above.

The zoom lens and the image pickup device provided by the application have the beneficial effects that: the zoom lens comprises a first lens seat, a second lens seat positioned at the inner side of the first lens seat, a rotating piece and a transmission structure, wherein the rotating piece and the transmission structure are rotatably connected to the first lens seat around an optical axis, the second lens seat is movably connected to the first lens seat along the optical axis, the first end of the transmission structure is in driving connection with the rotating piece, the second end of the transmission structure is connected with the second lens seat, and the transmission structure is used for driving the second lens seat to move along the optical axis when the rotating piece rotates. This zoom lens passes through transmission structure and connects rotating member and second mirror seat to can change the rotation of rotating member around the optical axis into the removal of second mirror seat along the optical axis direction, the user when needs adjust the focus of camera lens, only need rotate the rotating member can, its accommodation process is simple, convenient, swift, compare with traditional mechanical adjustment's mode, the flexibility of this application is better, application scope is bigger, and can promote the life of camera lens and user's use experience sense.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of the overall structure of a zoom lens according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an enlarged view at A of FIG. 2;

fig. 4 is a schematic overall structure of a first lens base according to an embodiment of the present application;

fig. 5 is a schematic overall structure of the cam ring of the embodiment of the present application.

Wherein, each reference sign in the figure:

100. a first lens base;

110. a waist-shaped groove;

120. a compression ring;

130. an annular groove;

200. a second lens base;

300. a rotating member;

310. a locking block;

320. a mounting hole;

330. an annular protrusion;

340. scale marks;

400. a transmission structure;

410. a cam ring; 411. a guide groove;

420. a guide post; 421. a stud; 422. a first cylinder; 423. a second cylinder;

500. an elastic member.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application 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 present application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

As described in the background art, the existing lens can only move all lens groups at the same time to adjust the focal length, and cannot adjust the positions of part of the lens groups, so that the flexibility of the lens is poor, the application range is small, although the traditional lens can be adjusted by changing the positions of all parts of the lens, namely, the lens is adjusted by changing the distances between all lens groups of the lens, so as to realize focal length adjustment of the lens, but after the focal length of the lens is adjusted by mechanical adjustment, all parts of the lens always need to bear larger load, and irreversible structural damage is easily caused to the lens.

In order to solve the above problems, according to one aspect of the present application, as shown in fig. 1 and 2, an embodiment of the present application provides a zoom lens including a first lens holder 100, a second lens holder 200, a rotation member 300, and a driving structure 400, the second lens holder 200 is positioned inside the first lens holder 100, and the second lens holder 200 is movably connected to the first lens holder 100 along an optical axis, the rotation member 300 is rotatably connected to the first lens holder 100 about the optical axis, a first end of the driving structure 400 is in driving connection with the rotation member 300, a second end of the driving structure 400 is connected to the second lens holder 200, and the driving structure 400 is used to drive the second lens holder 200 to move along the optical axis when the rotation member 300 rotates.

Specifically, the second lens holder 200 is movably connected to the first lens holder 100 along the optical axis, the rotating member 300 is rotatably connected to the first lens holder 100 around the optical axis, and the transmission structure 400 connects the rotating member 300 and the second lens holder 200, when the rotating member 300 rotates, the transmission structure 400 can drive the second lens holder 200 to move along the optical axis, that is, the rotation of the rotating member 300 around the optical axis is converted into the movement of the second lens holder 200 along the optical axis direction, so as to adjust the position of a part of the lens group of the lens, thereby realizing the focal length adjustment of the lens. The zoom lens of this application passes through transmission structure 400 and connects rotating member 300 and second lens holder 200 to turn into the rotation of rotating member 300 around the optical axis and follow the removal of optical axis direction with second lens holder 200, the user when needs adjust the focus of camera lens, only need rotate rotating member 300 can, its accommodation process is simple, convenient, swift, compare with traditional mechanical adjustment's mode, the flexibility of this application is good, application scope is big, and can avoid each spare part of camera lens to damage because of bearing too big load, promote the life of camera lens, can also avoid repeatedly dismouting bayonet socket simultaneously, promote the life and the user experience sense of camera lens.

In one embodiment, as shown in fig. 3 and 5, the driving structure 400 includes a cam ring 410 connected to the rotary member 300 and a guide post 420 connected to the second lens holder 200, the cam ring 410 is provided with a guide slot 411, and the guide post 420 is slidably disposed in the guide slot 411.

Specifically, the guide slot 411 extends spirally along the optical axis, and when the rotating member 300 drives the cam ring 410 of the transmission structure 400 to rotate, the guide post 420 can slide along the guide slot 411, so as to drive the second lens base 200 connected with the guide post 420 to move along the optical axis; the guide slot 411 is arranged to extend spirally along the optical axis direction, and the guide post 420 is arranged in the guide slot 411 in a sliding manner, so that a user can drive the second lens base 200 to move along the optical axis direction by rotating the rotating member 300, and focal length adjustment of the lens is realized.

In a specific embodiment, as shown in fig. 3 and 4, the first lens holder 100 is provided with a waist-shaped groove 110, and the guide post 420 is slidably disposed in the waist-shaped groove 110.

Specifically, the waist-shaped groove 110 extends in the direction of the optical axis, and by slidably disposing the guide post 420 in the waist-shaped groove 110, the rotation of the guide post 420 about the optical axis can be restricted to ensure that the guide post 420 moves in the direction of the optical axis when the rotating member 300 rotates the cam ring 410.

In this embodiment, as shown in fig. 3, the guide post 420 includes a stud 421, a first cylinder 422 sleeved on the stud 421, and a second cylinder 423 sleeved on the first cylinder 422, the first cylinder 422 is slidably disposed in the waist-shaped slot 110, and the second cylinder 423 is slidably disposed in the guide slot 411; specifically, by sliding the first cylinder 422 sleeved on the stud 421 into the waist-shaped groove 110 and sliding the second cylinder 423 sleeved on the first cylinder 422 into the guide groove 411, friction between parts of the lens when the second lens holder 200 is driven to move along the optical axis direction during rotation of the rotating member 300 can be reduced, and the service life of the lens can be prolonged.

In another specific embodiment, as shown in fig. 2, the first lens holder 100 is provided with a pressing ring 120, the pressing ring 120 and the first lens holder 100 enclose a chute, and the cam ring 410 is slidably disposed in the chute.

Specifically, the cam ring 410 is slidably disposed in the slide groove formed by the compression ring 120 and the first lens holder 100, so that stability in rotation of the cam ring 410 can be ensured, and the position of the cam ring 410 can be restricted, thereby preventing the cam ring 410 from sliding away from the first lens holder 100 in rotation about the optical axis.

In one embodiment, the transmission structure 400 is provided in plurality, and the plurality of transmission structures 400 are arranged at intervals from each other in the circumferential direction of the second lens holder 200.

Specifically, when the rotating member 300 is rotated, the second lens holder 200 is driven to move along the direction of the optical axis by the plurality of transmission structures 400, so as to ensure that the rotation of the rotating member 300 can be converted into the movement of the second lens holder 200 along the direction of the optical axis, and the second lens holder 200 is driven to move along the direction of the optical axis by the plurality of transmission structures 400, and when any one of the transmission structures 400 is damaged, the second lens holder 200 can still be driven to move along the direction of the optical axis by the other transmission structure or structures 400; in the present embodiment, the transmission structure 400 is provided as three.

In one embodiment, as shown in fig. 1 and 2, the rotating member 300 is provided with a movable locking block 310, and the locking block 310 may abut against the first lens holder 100.

Specifically, by making the lock block 310 on the rotating member 300 abut against the first lens holder 100, the position of the rotating block and thus the position of the second lens holder 200 can be locked, so that the second lens holder 200 is prevented from moving in the direction of the optical axis when the lens is in use.

In one particular embodiment, as shown in FIG. 2, the swivel 300 is provided with a mounting hole 320, and the lock block 310 is threadedly coupled to the mounting hole 320.

Specifically, the locking block 310 is screwed into the mounting hole 320 of the rotating member 300, and when the position of the locking block 310 needs to be adjusted to make the locking block 310 prop against or separate from the first lens seat 100, a user only needs to rotate the locking block 310 clockwise or anticlockwise, so that the locking and unlocking processes of the rotating member 300 are simple and convenient.

In this embodiment, the rotating member 300 has an annular protrusion 330, the first lens holder 100 is provided with an annular groove 130 along the circumferential direction thereof, the annular protrusion 330 is slidably disposed in the annular groove 130, and by slidably disposing the annular protrusion 330 in the annular groove 130, it can provide guidance for the rotation of the rotating member 300, and the stability of the rotating member 300 during rotation is improved.

In one embodiment, as shown in fig. 1, the rotary member 300 is provided with a plurality of graduation marks 340 along the circumferential direction of the first lens holder 100, and the plurality of graduation marks 340 are disposed at intervals from each other.

Specifically, by providing the rotary member 300 with a plurality of graduation marks 340 arranged along the circumferential direction of the first lens holder 100, it is possible to provide the user with easily identifiable position information, and the rotary member 300 can be rotated to a designated position according to the graduation marks 340 when the user uses next time.

In one embodiment, as shown in fig. 2, the lens module further includes an elastic member 500, wherein a first end of the elastic member 500 is connected to the first lens holder 100, and a second end of the elastic member 500 is connected to the second lens holder 200.

Specifically, the elastic member 500 can provide an elastic force to drive the second lens base 200 to move along the optical axis in a direction away from the first lens base 100, which can eliminate the problem of backlash caused by machining errors, and can also ensure the operation hand feeling of the user during use; in this embodiment, the elastic member 500 is provided as a spring, and the elastic force in the effective stroke thereof is controlled to be between 1.5 and 2.5 times the weight of the floating group.

According to another aspect of the present application, there is also provided an image pickup apparatus including a zoom lens.

It can be understood that, since the image capturing device includes the zoom lens described above, the second lens base 200 can be driven to move along the direction of the optical axis by rotating the rotating member 300, so as to adjust the position of a part of the lens group of the lens, thereby realizing the focal length adjustment of the lens.

In summary, implementing the zoom lens and the image pickup apparatus provided in this embodiment has at least the following beneficial technical effects:

the rotating member 300 and the second lens seat 200 are connected through the transmission structure 400, the rotation of the rotating member 300 around the optical axis is converted into the movement of the second lens seat 200 along the optical axis direction, when a user needs to adjust the focal length of the lens, the user only needs to rotate the rotating member 300, the adjusting process is simple, convenient and quick, compared with the traditional mechanical adjusting mode, the zoom lens is good in flexibility and wide in application range, parts of the lens can be prevented from being damaged due to overlarge load, the service life of the lens is prolonged, repeated dismounting bayonets can be avoided, and the service life and user experience of the lens are prolonged.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A zoom lens, characterized by comprising:

a first lens base;

the second lens seat is positioned at the inner side of the first lens seat and is movably connected with the first lens seat along the optical axis;

the rotating piece is rotatably connected to the first lens seat around the optical axis;

the first end of the transmission structure is in driving connection with the rotating piece, the second end of the transmission structure is connected with the second lens seat, and the transmission structure is used for driving the second lens seat to move along the optical axis when the rotating piece rotates.

2. The zoom lens according to claim 1, wherein the transmission structure includes a cam ring connected to the rotary member and a guide post connected to the second lens holder, the cam ring being provided with a guide groove, the guide post being slidably disposed in the guide groove.

3. The zoom lens of claim 2, wherein the first lens mount is provided with a waist-shaped groove, and the guide post is slidably disposed in the waist-shaped groove.

4. The zoom lens according to claim 2, wherein the first lens holder is provided with a pressing ring, the pressing ring and the first lens holder enclose a chute, and the cam ring is slidably disposed in the chute.

5. The zoom lens according to claim 1, wherein the transmission structure is provided in plural, and the transmission structures are arranged at intervals from each other in the circumferential direction of the second lens holder.

6. A zoom lens according to claim 1, wherein the rotary member is provided with a movable lock block, the lock block being adapted to abut against the first lens holder.

7. The zoom lens according to claim 6, wherein the rotary member is provided with a mounting hole, and the lock block is screwed into the mounting hole.

8. The zoom lens according to claim 1, wherein the rotary member is provided with a plurality of graduation marks along a circumferential direction of the first lens holder, the plurality of graduation marks being disposed at intervals from each other.

9. The zoom lens of any one of claims 1-8, further comprising an elastic member, a first end of the elastic member being coupled to the first lens mount, and a second end of the elastic member being coupled to the second lens mount.

10. An image pickup apparatus comprising the zoom lens according to any one of claims 1 to 9.