阅读说明：本技术 伸缩式变焦镜头 (Telescopic zoom lens ) 是由 王玉 李昆 王浩 肖明志 李敏德 吕祖文 姚洪辉 于 2021-07-02 设计创作，主要内容包括：本发明公开一种伸缩式变焦镜头,包括壳体、第一变焦组件、第二变焦组件、传动结构和驱动组件,壳体内形成有一安装通道,安装通道的一端为物侧端,另一端为像侧端：第一变焦组件设于安装通道,第一变焦组件包括第一变焦镜筒,第一变焦镜筒沿安装通道的深度方向可调节设置；第二变焦组件设置在第一变焦镜筒的内侧；传动结构包括能够传动耦合的第一齿轮和传动轮,第一齿轮与第一变焦镜筒驱动连接；驱动组件包括第一驱动结构和第二驱动结构,第二驱动结构驱动第二镜筒活动,第一驱动结构驱动连接传动轮；其中,第一驱动结构驱动传动轮转动时,第一齿轮能够与传动轮同步转动；第一变焦镜筒受外力回缩移动时,第一齿轮与传动轮能够相对转动。(The invention discloses a telescopic zoom lens, which comprises a shell, a first zoom component, a second zoom component, a transmission structure and a driving component, wherein an installation channel is formed in the shell, one end of the installation channel is an object side end, and the other end of the installation channel is an image side end: the first zooming component is arranged in the mounting channel and comprises a first zooming lens barrel, and the first zooming lens barrel is arranged in an adjustable manner along the depth direction of the mounting channel; the second zoom component is arranged at the inner side of the first zoom lens barrel; the transmission structure comprises a first gear and a transmission wheel which can be in transmission coupling, and the first gear is in driving connection with the first zoom lens barrel; the driving assembly comprises a first driving structure and a second driving structure, the second driving structure drives the second lens barrel to move, and the first driving structure is in driving connection with the driving wheel; when the first driving structure drives the driving wheel to rotate, the first gear can synchronously rotate with the driving wheel; when the first zoom lens barrel retracts and moves under the action of external force, the first gear and the transmission wheel can rotate relatively.)

1. A retractable zoom lens, comprising:

the device comprises a shell, wherein an installation channel is formed in the shell, one end of the installation channel is an object side end, and the other end of the installation channel is an image side end:

the first zoom component is arranged in the installation channel and comprises a first zoom lens barrel and a first zoom lens arranged in the first zoom lens barrel, and the first zoom lens barrel is arranged in an adjustable manner along the depth direction of the installation channel;

the second zoom assembly is arranged on the inner side of the first zoom lens barrel and comprises a first lens group and a second lens group which are arranged at intervals along the depth direction of the mounting channel, the first lens group comprises a first lens barrel and at least one first lens arranged in the first lens barrel, the second lens group comprises a second lens barrel and at least one second lens arranged in the second lens barrel, the first lens barrel is movably mounted on the second lens barrel along the depth direction of the mounting channel, and the second lens barrel is arranged in an adjustable manner along the depth direction of the mounting channel;

the transmission structure comprises a first gear and a transmission wheel which can be in transmission coupling, and the first gear is in driving connection with the first zoom lens barrel; and the number of the first and second groups,

the driving assembly comprises a first driving structure and a second driving structure, the second driving structure drives the second lens barrel to move, and the first driving structure is in driving connection with the driving wheel;

when the first driving structure drives the driving wheel to rotate, the first gear and the driving wheel can synchronously rotate;

when the first zoom lens barrel retracts and moves under the action of external force, the first gear and the transmission wheel can rotate relatively.

2. The telescopic zoom lens of claim 1, wherein said driving wheel is a worm wheel;

the first drive structure further comprises:

a drive motor; and the number of the first and second groups,

and one end of the worm is in driving connection with the driving motor, and the other end of the worm is meshed with the worm wheel.

3. The retractable zoom lens of claim 1, further comprising a driving cylinder rotatably and adjustably mounted in the mounting passage, and a first transmission mechanism is disposed between the first zoom lens barrel and the driving cylinder, the first transmission mechanism being configured to convert rotation of the driving cylinder into movement of the first zoom lens barrel in a depth direction of the mounting passage;

the outer surface of the driving cylinder is provided with a rack, and the rack is matched with the first gear to synchronously rotate with the first gear.

4. The telescopic zoom lens according to claim 3, wherein a second transmission mechanism is provided between the housing and the driving cylinder, the second transmission mechanism includes a plurality of sliding chutes and a plurality of driving slides that are engaged with each other, each sliding chute is disposed to be inclined with respect to a depth direction of the mounting passage, the plurality of sliding chutes are circumferentially spaced on an inner wall surface of the housing, and the plurality of driving slides are correspondingly disposed on an outer wall surface of the driving cylinder.

5. The telescopic zoom lens according to claim 4, wherein each of the driving sliders has an abutting side surface, and two first correction protrusions are protruded from the abutting side surface at intervals in a depth direction of the mount passage, and the two first correction protrusions abut against a side wall surface of the slide chute.

6. The telescopic zoom lens system as claimed in claim 4, wherein a plurality of second correction protrusions are protruded from an outer wall surface of the driving cylinder, the plurality of second correction protrusions are spaced apart from the plurality of driving sliders, and the plurality of second correction protrusions are abutted against an inner wall surface of the driving cylinder.

7. The telescopic zoom lens according to claim 1, wherein the transmission structure further includes a connecting shaft extending in a depth direction of the mounting passage, the connecting shaft being fixedly mounted on an inner wall surface of the housing;

the first gear rotates and the driving wheel sequentially rotates to be sleeved on the outer surface of the connecting shaft.

8. The telescopic zoom lens according to claim 7, wherein an end surface of the first gear facing away from the driving wheel is provided with a mounting groove;

the transmission structure further includes:

the clamp spring is fixedly arranged on the connecting shaft and is positioned on one side of the first gear, which is far away from the driving wheel; and the number of the first and second groups,

and the two ends of the pre-tightening spring are respectively abutted against the snap spring and the bottom wall surface of the mounting groove.

9. The retractable zoom lens of claim 1, wherein the first zoom lens barrel is movable along the mounting channel to an inner upper wall surface thereof against the first lens barrel;

the second zooming component also comprises at least one compression spring, and the upper end and the lower end of the compression spring are respectively propped against the first lens cone and the second lens cone.

10. The retractable zoom lens of claim 1, wherein the second driving assembly further comprises a VCM motor or a piezoelectric motor, and a driving end of the VCM motor or the piezoelectric motor is connected to the second barrel for driving the second barrel to move the first barrel along the depth direction of the mounting channel.

Technical Field

The invention relates to the technical field of optical lenses, in particular to a telescopic zoom lens.

Background

Mobile phones sold in the market at present are equipped with a plurality of optical photographing modules, an optical system of the traditional mobile phone photographing module is designed into a fixed-focus mode, and then a zoom module with a movable lens group is developed successively. The thickness of the mobile phone has certain limitation, which makes the moving range of the movable lens relatively limited, in order to overcome the disadvantage that the moving range of the movable lens group is limited by the thickness of the mobile phone, research and development personnel propose the zoom lens with a periscopic structure, however, in the zoom lens with the periscopic structure, the diameter of the lens is limited by the thickness of the mobile phone, so that the diameter of the lens is relatively small, which reduces the light flux entering the zoom optical module and affects the imaging quality. Developing a zoom lens with high imaging quality is a technical problem that needs to be solved currently.

Disclosure of Invention

The invention mainly aims to provide a telescopic zoom lens, which can adjust the focal length in a telescopic mode and is not limited by the thickness of a mobile phone.

However, in the shooting process of the mobile phone, for example, in a place with dense crowds or a narrow space, the overall thickness of the extended lens is larger than that of the mobile phone, and the extended lens is easily damaged by being collided and scratched.

To achieve the above object, the present invention provides a telescopic zoom lens, including:

the device comprises a shell, wherein an installation channel is formed in the shell, one end of the installation channel is an object side end, and the other end of the installation channel is an image side end:

the first zoom component is arranged in the installation channel and comprises a first zoom lens barrel and a first zoom lens arranged in the first zoom lens barrel, and the first zoom lens barrel is arranged in an adjustable manner along the depth direction of the installation channel;

the second zoom assembly is arranged on the inner side of the first zoom lens barrel and comprises a first lens group and a second lens group which are arranged at intervals along the depth direction of the mounting channel, the first lens group comprises a first lens barrel and at least one first lens arranged in the first lens barrel, the second lens group comprises a second lens barrel and at least one second lens arranged in the second lens barrel, the first lens barrel is movably mounted on the second lens barrel along the depth direction of the mounting channel, and the second lens barrel is arranged in an adjustable manner along the depth direction of the mounting channel;

the transmission structure comprises a first gear and a transmission wheel which can be in transmission coupling, and the first gear is in driving connection with the first zoom lens barrel; and the number of the first and second groups,

the driving assembly comprises a first driving structure and a second driving structure, the second driving structure drives the second lens barrel to move, and the first driving structure is in driving connection with the driving wheel;

when the first driving structure drives the driving wheel to rotate, the first gear and the driving wheel can synchronously rotate;

when the first zoom lens barrel retracts and moves under the action of external force, the first gear and the transmission wheel can rotate relatively.

Optionally, the first zoom lens barrel can move along the installation channel until the upper wall surface of the inner side of the first zoom lens barrel abuts against the first lens barrel;

the second zooming component also comprises at least one compression spring, and the upper end and the lower end of the compression spring are respectively propped against the first lens cone and the second lens cone.

Optionally, at least one convex column is convexly arranged on the outer side surface of the first lens barrel, and a guide hole extending along the depth direction of the installation channel is penetratingly arranged on the convex column;

a guide post is arranged on the second lens barrel corresponding to the guide hole and penetrates through the guide hole;

wherein, the compression spring is sleeved on the outer surface of the convex column.

Optionally, a plurality of guide posts, a plurality of guide holes and a plurality of convex posts are arranged in one-to-one correspondence;

the at least one compression spring is sleeved on one of the convex columns.

Optionally, a limiting groove is formed in the second lens barrel corresponding to the compression spring;

the lower end of the compression spring extends into the limiting groove and abuts against the bottom wall surface of the limiting groove.

Optionally, the second zoom assembly further includes a limiting structure, and the limiting structure includes:

the limiting column is arranged on the outer wall surface of the first lens barrel; and the number of the first and second groups,

the limiting frame comprises two supporting arms and a connecting arm for connecting one sides of the two supporting arms facing to the object side end, and one sides of the two supporting arms facing to the image side end are fixedly arranged on the second lens cone;

the limiting column is located between the two supporting arms, and moves to abut against the connecting arm to limit the movement stroke of the first lens barrel towards the object side end.

Optionally, a through hole extending along the depth direction of the mounting channel penetrates through the limiting column;

the limiting structure further comprises a guide rod, the guide rod is located between the two supporting arms, one end of the guide rod is connected with the second lens cone, and the other end of the guide rod penetrates through the through hole to be connected with the connecting arm.

Optionally, the limiting columns, the limiting frame, the through holes and the guide rods are in one-to-one correspondence to form limiting groups, and two limiting groups are arranged at intervals along the circumferential direction of the first lens barrel.

Optionally, the second driving structure further includes a VCM motor or a piezoelectric motor, and a driving end of the VCM motor or the piezoelectric motor is connected to the second barrel for driving the second barrel to drive the first barrel to move along the depth direction of the installation channel.

Optionally, the number of the first lenses is 3, and the first lenses are arranged at intervals along the depth direction of the installation channel;

the second lens is equipped with 2, and follows the depth direction interval of installation passageway sets up.

Optionally, the first gear and the driving wheel are oppositely arranged along the depth direction of the installation channel, the end face of the first gear facing the driving wheel is provided with a plurality of clamping grooves, and the plurality of clamping grooves are circumferentially arranged at intervals;

the drive wheel is correspondingly provided with a plurality of clamping protrusions, and the clamping protrusions can be correspondingly clamped and installed in the clamping grooves respectively.

Optionally, the transmission structure further includes a connecting shaft extending in a depth direction of the mounting channel, and the connecting shaft is fixedly mounted on an inner wall surface of the housing;

the first gear rotates and the driving wheel sequentially rotates to be sleeved on the outer surface of the connecting shaft.

Optionally, an end face of the first gear, which faces away from the driving wheel, is provided with a mounting groove;

the transmission structure further includes:

the clamp spring is fixedly arranged on the connecting shaft and is positioned on one side of the first gear, which is far away from the driving wheel; and the number of the first and second groups,

and the two ends of the pre-tightening spring are respectively abutted against the snap spring and the bottom wall surface of the mounting groove.

Optionally, the transmission wheel is a worm wheel;

the first drive structure further comprises:

a drive motor; and the number of the first and second groups,

and one end of the worm is in driving connection with the driving motor, and the other end of the worm is meshed with the worm wheel.

Optionally, the retractable zoom lens further includes a driving cylinder, the driving cylinder is rotatably and adjustably mounted in the mounting channel, and a first transmission mechanism is disposed between the first zoom lens barrel and the driving cylinder, and is configured to convert rotation of the driving cylinder into movement of the first zoom lens barrel along a depth direction of the mounting channel;

the outer surface of the driving cylinder is provided with a rack, and the rack is matched with the first gear to synchronously rotate with the first gear.

Optionally, the driving cylinder and the first gear are arranged at intervals along the depth direction of the mounting cylinder;

and a connecting gear is arranged between the driving cylinder and the first gear, and the connecting gear is respectively meshed with the rack and the first gear.

Optionally, the first transmission mechanism includes a plurality of driving chutes and a plurality of driving columns that are matched with each other, each driving chute is disposed in an inclined manner in a depth direction of the mounting channel, the plurality of driving chutes are circumferentially disposed on an inner wall surface of the driving cylinder at intervals, and the plurality of driving columns are correspondingly disposed on an outer wall surface of the first zoom lens barrel, so that when the driving cylinder rotates, the first zoom lens barrel is driven to move in the depth direction of the mounting channel.

Optionally, a second transmission mechanism is arranged between the casing and the driving cylinder, the second transmission mechanism includes a plurality of sliding chutes and a plurality of sliding columns which are matched with each other, each sliding chute is obliquely arranged with the depth direction of the installation channel, the plurality of sliding chutes are circumferentially arranged on the inner wall surface of the casing at intervals, and the plurality of sliding columns are correspondingly arranged on the outer wall surface of the driving cylinder.

Optionally, a fixed cylinder is further disposed in the installation channel, the fixed cylinder is located inside the driving cylinder, a guide hole for accommodating the driving column extends along the depth direction of the installation channel along the circumference of the fixed cylinder, and the driving column passes through the guide hole and is guided by the guide hole to limit circumferential rotation of the guide column.

Optionally, the second transmission mechanism includes a plurality of sliding chutes and a plurality of driving sliding strips, the sliding chutes and the mounting channel are mutually matched, each sliding chute is obliquely arranged in the depth direction, the sliding chutes are circumferentially arranged on the inner wall surface of the housing at intervals, and the driving sliding strips are correspondingly arranged on the outer wall surface of the driving cylinder.

Optionally, each driving slide bar has an attaching side surface, two first correction protrusions are convexly arranged on the attaching side surface and spaced apart from each other in the depth direction of the installation channel, and the two first correction protrusions abut against the side wall surface of the sliding chute.

Optionally, a plurality of second correction protrusions are convexly disposed on an outer wall surface of the driving cylinder, the plurality of second correction protrusions are disposed at intervals with the plurality of driving sliders, and the plurality of second correction protrusions abut against an inner wall surface of the driving cylinder.

In the technical scheme of the invention, an installation channel is formed in the shell, a first zooming component and a second zooming component are sequentially arranged in the installation channel from the object side end to the image side end, the first zooming component and the second zooming component can respectively perform telescopic motion integrally, meanwhile, in the second zooming component, a second lens group has a certain movable stroke relative to a first lens group, when a larger zooming magnification is needed, the first zooming component and the second zooming component extend out of the shell, the distance between the first zooming component and the second zooming component is changed to realize the zooming function, so that a larger zooming magnification is obtained through combined adjustment, in the normal use process, the transmission structure of the first driving structure rotates, and the transmission wheel drives the first gear to synchronously rotate, at the moment, the lens can be controlled to extend out and retract on the mobile phone, and in the process of extending out the lens for taking a picture, when the first zoom lens barrel is pressed by external force, the first zoom lens barrel retracts to drive the first gear to rotate reversely, and at the moment, the first driving structure is in a static state because the first driving structure does not receive a control command, and the driving wheel connected with the first driving structure is also in a static state, during the reverse rotation of the first gear, the coupling state of the first gear and the transmission wheel is separated, at the moment, the first gear can idle, thereby realizing that the first zoom lens barrel can automatically retract for a certain distance under the condition that a user does not control after being pressed by external force, the lens is protected, and meanwhile, the miniaturization of the zoom lens is met, the light flux is improved, and the effects of a protection mechanism which can be pressed and retracted in collision are increased.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of an embodiment of a retractable zoom lens provided in the present invention;

FIG. 2 is a schematic cross-sectional view of the second zoom assembly of FIG. 1 in an extended state;

fig. 3 is a perspective view illustrating the first barrel and the second barrel of fig. 1;

FIG. 4 is a perspective view of the transmission structure of FIG. 1

FIG. 5 is a cross-sectional schematic view of the transmission of FIG. 4;

FIG. 6 is a perspective view of the first gear of FIG. 4;

FIG. 7 is a perspective view of the drive wheel of FIG. 4;

FIG. 8 is a partial perspective view of the housing of FIG. 1;

fig. 9 is a perspective view of the first zoom lens barrel of fig. 1;

FIG. 10 is a perspective view of the drive cylinder (one embodiment) of FIG. 1;

fig. 11 is a perspective view of the drive cylinder of fig. 1 (another embodiment).

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indication is involved in the embodiment of the present invention, the directional indication is only used for explaining the relative positional relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Fig. 1 to 11 illustrate an embodiment of a zoom lens according to the present invention.

Referring to fig. 1 to 2, the retractable zoom lens 100 includes a housing, a first zoom assembly, a second zoom assembly, a transmission structure and a driving assembly, wherein an installation channel is formed in the housing, one end of the installation channel is an object-side end, and the other end is an image-side end: the first zoom component is arranged in the mounting channel and comprises a first zoom lens barrel and a first zoom lens arranged in the first zoom lens barrel, and the first zoom lens barrel is arranged in an adjustable manner along the depth direction of the mounting channel; the second zoom assembly is arranged on the inner side of the first zoom lens barrel, the second zoom assembly comprises a first lens group and a second lens group which are arranged at intervals along the depth direction of the mounting channel, the first lens group comprises a first lens barrel and at least one first lens arranged in the first lens barrel, the second lens group comprises a second lens barrel and at least one second lens arranged in the second lens barrel, the first lens barrel is movably mounted on the second lens barrel along the depth direction of the mounting channel, and the second lens barrel is arranged along the depth direction of the mounting channel in an adjustable manner; the transmission structure comprises a first gear and a transmission wheel which can be in transmission coupling, and the first gear is in driving connection with the first zoom lens barrel; the driving assembly comprises a first driving structure and a second driving structure, the second driving structure drives the second lens barrel to move, and the first driving structure is in driving connection with the driving wheel; when the first driving structure drives the driving wheel to rotate, the first gear and the driving wheel can synchronously rotate; when the first zoom lens barrel retracts and moves under the action of external force, the first gear and the transmission wheel can rotate relatively.

In the technical scheme of the invention, an installation channel is formed in the shell, a first zooming component and a second zooming component are sequentially arranged in the installation channel from the object side end to the image side end, the first zooming component and the second zooming component can respectively perform telescopic motion integrally, meanwhile, in the second zooming component, a second lens group has a certain movable stroke relative to a first lens group, when a larger zooming magnification is needed, the first zooming component and the second zooming component extend out of the shell, the distance between the first zooming component and the second zooming component is changed to realize the zooming function, so that a larger zooming magnification is obtained through combined adjustment, in the normal use process, the transmission structure of the first driving structure rotates, and the transmission wheel drives the first gear to synchronously rotate, at the moment, the lens can be controlled to extend out and retract on the mobile phone, and in the process of extending out the lens for taking a picture, when the first zoom lens barrel is pressed by external force, the first zoom lens barrel retracts to drive the first gear to rotate reversely, and at the moment, the first driving structure is in a static state because the first driving structure does not receive a control command, and the driving wheel connected with the first driving structure is also in a static state, during the reverse rotation of the first gear, the coupling state of the first gear and the transmission wheel is separated, at the moment, the first gear can idle, thereby realizing that the first zoom lens barrel can automatically retract for a certain distance under the condition that a user does not control after being pressed by external force, the lens is protected, and meanwhile, the miniaturization of the zoom lens is met, the light flux is improved, and the effects of a protection mechanism which can be pressed and retracted in collision are increased.

The optical structure requires that the two parts of the first lens group and the second lens group are separated by a certain distance, and the two parts are overlapped when the lenses are in a compressed state, so in an embodiment, referring to fig. 2 to 3, the first zoom lens barrel 21 can move along the installation channel until the inner upper wall surface of the first zoom lens barrel abuts against the first lens barrel 311; the second zoom assembly further includes at least one compression spring 33, and upper and lower ends of the compression spring 33 respectively abut against the first barrel 311 and the second barrel 321. When the first zoom lens barrel 21 is in a compressed state, the first zoom lens barrel 21 abuts against the first lens barrel 311, so that the compression spring is compressed, the first lens barrel 311 is attached to the second lens barrel 321, when the lens is extended, the first zoom lens barrel 21 is driven by a driving force to move towards an object side end, the compression spring 33 gradually rebounds, at this time, the second lens barrel 321 and the first lens barrel 311 are influenced by the first zoom lens to generate relative displacement, when the compression spring 33 is fully extended, the maximum distance which can be reached in a focusing process is between the first lens barrel 311 and the second lens barrel 321, the first lens barrel 311 and the second lens barrel 321 are kept relatively stable, when the second zoom assembly is driven to move, the first lens barrel 311 and the second lens barrel 321 synchronously move, and the arrangement structure is simple, the occupied space is small.

In other embodiments, the first lens barrel 311 and the second lens group are provided with a pop-up structure so that the first lens barrel 311 can move relative to the second lens barrel 321, and the pop-up structure can be implemented in a manner of matching an elastic sheet or a disc spring with a cylinder, which is not described herein again.

Further, in the process that the compression spring 33 ejects the first lens barrel 311, in order to ensure the stability of the moving stroke of the first lens barrel 311, at least one convex column 341 is convexly arranged on the outer side surface of the first lens barrel 311, and a guide hole extending along the depth direction of the installation channel is penetratingly arranged on the convex column 341; the second lens barrel 321 is provided with a guide column 342 corresponding to the guide hole, and the guide column 342 is arranged in the guide hole in a penetrating manner; wherein, the compression spring 33 is sleeved on the outer surface of the guide column 342. The guide post 342 and the guide hole limit the linear motion track of the first barrel 311 relative to the second barrel 321, and the compression spring 33 is on the outer surface of the convex post 341, so that the structure is more compact, and the position of the compression spring 33 is limited to prevent the compression spring 33 from falling off.

It should be noted that a plurality of the guide posts 342, the guide holes, and the convex posts 341 are correspondingly arranged one by one; the at least one compression spring 33 is sleeved on one of the convex columns 341. The device is reasonably set according to actual size requirements to ensure stability.

In other embodiments, in order to limit the position of the compression spring 33, a limit groove 3211 is disposed on the second barrel 321 corresponding to the compression spring 33; the lower end of the compression spring 33 extends into the limiting groove 3211 and abuts against the bottom wall surface of the limiting groove 3211. Thereby preventing the compression spring 33 from falling off between the first barrel 311 and the second barrel 321 during compression and extension.

In order to limit the relative displacement between the first barrel 311 and the second barrel 321, the second zoom assembly further includes a limiting structure 35, the limiting structure 35 includes a limiting column 351 and a limiting frame, and the limiting column 351 is disposed on the outer wall surface of the first barrel 311; the limiting frame comprises two supporting arms 3521 and a connecting arm 3522 for connecting one side of the two supporting arms 3521 facing to the object side end, and one side of the two supporting arms 3521 facing to the image side end is fixedly arranged on the second lens cone 321; the position-limiting column 351 is located between the two support arms 3521, and the position-limiting column 351 moves to abut against the connecting arm 3522 to limit the movement stroke of the first lens barrel 311 towards the object side end. That is, when the compression spring 33 rebounds to abut against the first barrel 311 and the connecting arm 3522, the maximum stroke is reached.

Moreover, a through hole extending along the depth direction of the mounting channel is arranged on the limiting column 351 in a penetrating manner; the limiting structure 35 further includes a guide rod 353, the guide rod 353 is located between the two support arms 3521, one end of the guide rod 353 is connected to the second lens barrel 321, and the other end of the guide rod 353 passes through the through hole and is connected to the connecting arm 3522. The guide 353 is provided to limit the linear stroke of the first barrel 311.

It should be noted that the limiting columns 351, the limiting frames, the through holes and the guide rods 353 correspond to limiting groups one by one, and two limiting groups are arranged at intervals along the circumferential direction of the first lens barrel 311. The two limiting groups are symmetrically arranged, so that the first lens barrel 311 is prevented from being tilted away from one side of the limiting frame when the first lens barrel is singly arranged, and the focusing effect is prevented from being influenced.

The invention is not limited to the driving structure for implementing the integral telescopic driving of the second zoom component, and specifically, the second driving structure may be a VCM motor or a piezoelectric motor, and a driving end of the VCM motor or the piezoelectric motor is connected to the second barrel 321 to drive the first barrel 311 to move along the depth direction of the installation channel. The VCM Motor is VioceCoil Motor for short, namely voice coil Motor, and the VCM Motor is in under the effect of yoke and magnetite, can order about second lens cone 321 follows the depth direction of installation passageway removes, has low noise, advantages such as low power dissipation, better satisfying market demand and the higher and higher requirement of customer. The piezoelectric motor is an electric motor that performs electromechanical energy conversion by utilizing the piezoelectric reverse effect of a piezoelectric body. The vibration part consists of two parts, namely a vibration part and a moving part, and has no winding, magnet and insulating structure. The power density is much higher than that of the common motor, but the output power is limited, and the motor is preferably made into a light, thin and short type. The output of the device is mostly low-speed large thrust, direct drive load can be realized, and the influence on external electromagnetic interference and noise is small.

In addition, in the embodiment of the invention, in order to realize a better focusing effect, 3 first lenses are arranged and are arranged at intervals along the depth direction of the mounting channel; the second lens is equipped with 2, and follows the depth direction interval of installation passageway sets up. It should be noted that each of the first lenses and each of the second lenses are different, and more lenses may be provided according to actual requirements.

It should be noted that the focusing accuracy can be made higher by providing a displacement sensor to detect the position accuracy.

Further, the coupling connection manner between the first gear 41 and the driving wheel 42 is not limited in the present invention, in this embodiment, referring to fig. 6 to 7, the first gear 41 and the driving wheel 42 are oppositely disposed along the depth direction of the installation channel, the end surface of the first gear 41 facing the driving wheel 42 is provided with a plurality of slots 411, and the slots 411 are circumferentially spaced; the driving wheel 42 is correspondingly provided with a plurality of clamping protrusions 421, and the clamping protrusions 421 can be correspondingly clamped and mounted in the clamping grooves 411 respectively. In a natural state, the locking projections 421 are connected with the locking grooves 411 in a buckling manner, so that the first gear 41 and the driving wheel 42 can synchronously rotate, when the first gear is retracted and moved by an external force, the locking projections 421 are separated from the locking grooves 411 and are not in limited connection at the moment, the first gear 41 can idle, the arrangement mode is simple in structure and can meet design requirements, it needs to be explained that when the locking projections 421 and the locking grooves 411 need to be buckled again after dislocation, fine adjustment can be carried out through corresponding driving structures, the locking projections 421 in the invention are the same, the locking grooves 411 are also the same, the locking projections 421 and the locking grooves 411 are not designated in matching, and the locking projections 421 can be moved to be matched with each locking groove 411.

It should be noted that, in other embodiments, other ejection structures may be further provided to enable relative rotation between the first gear 41 and the transmission wheel 42, which will not be described in detail again.

Referring to fig. 4 to 5, in order to facilitate the motion guidance between the first gear 41 and the transmission wheel 42, the transmission structure 4 further includes a connection shaft 43 extending along the depth direction of the installation channel, and the connection shaft 43 is fixedly installed on the inner wall surface of the housing 1; the first gear 41 and the transmission wheel 42 are sequentially sleeved on the outer surface of the connecting shaft 43 in a rotating manner. The connecting shaft 43 enables the two to rotate along the same axis all the time, and the coaxial effect is guaranteed.

Because there are two states between the first gear 41 and the transmission wheel 42, in this embodiment, an end surface of the first gear 41 facing away from the transmission wheel 42 is provided with a mounting groove 412; the transmission structure 4 further comprises a clamp spring 44 and a pre-tightening spring 45, wherein the clamp spring 44 is fixedly arranged on the connecting shaft 43 and is positioned on one side of the first gear 41, which is far away from the transmission wheel 42; the pre-tightening spring 45 is located in the mounting groove 412, and two ends of the pre-tightening spring 45 respectively abut against the snap spring 44 and the bottom wall surface of the mounting groove 412. When the locking protrusion 421 and the locking groove 411 are in a corresponding locked state, the first gear 41 always has a pressing force toward the driving wheel 42 under the cooperation of the locking spring 44 and the pre-tightening spring 45, so as to ensure the relative positions of the two.

In order to make the structure more compact and occupy less space, the first driving structure may be horizontally placed when being arranged, and specifically, the driving wheel 42 is a worm wheel; the first driving structure further comprises a driving motor and a worm, one end of the worm is in driving connection with the driving motor, the other end of the worm is meshed with the worm wheel, and the transmission of driving force in different directions is achieved through the mutual matching of the worm wheel and the worm.

Referring to fig. 10, in order to drive the first zoom lens barrel 21, the retractable zoom lens 100 further includes a driving cylinder 5, the driving cylinder 5 is rotatably and adjustably installed in the installation channel, and a first transmission mechanism is disposed between the first zoom lens barrel 21 and the driving cylinder 5, and is configured to convert the rotation of the driving cylinder 5 into a movement of the first zoom lens barrel 21 along a depth direction of the installation channel; wherein, the outer surface of the driving cylinder 5 is provided with a rack 51, and the rack 51 is matched with the first gear 41 to rotate synchronously with the first gear 41. The driving cylinder 5 and the first transmission mechanism are matched, so that driving devices can be reduced, and the complex structure is simplified.

Since there may be a certain distance between the driving cylinder 5 and the first gear 41 in terms of spatial layout, in an embodiment of the present invention, the driving cylinder 5 and the first gear 41 are arranged at intervals along the depth direction of the installation cylinder; a connecting gear 46 is arranged between the driving cylinder 5 and the first gear 41, and the connecting gear 46 is respectively meshed with the rack 51 and the first gear 41. The connecting gear 46 is a cylindrical gear having a height greater than the first gear 41, mainly for the purpose of using the drive cylinder 5 and the first drive structure and also for the spatial distance.

In this embodiment, referring to fig. 8 to 10, the first transmission mechanism includes a plurality of driving chutes 61 and a plurality of driving columns 62 that are matched with each other, each of the driving chutes 61 is disposed in an inclined manner with respect to the depth direction of the mounting channel, the driving chutes 61 are circumferentially disposed on the inner wall surface of the driving cylinder 5 at intervals, and the driving columns 62 are correspondingly disposed on the outer wall surface of the first zoom lens barrel 21, so that when the driving cylinder 5 rotates, the first zoom lens barrel 21 is driven to move along the depth direction of the mounting channel. When the driving cylinder 5 rotates, the driving column 62 slides in the driving chute 61 to drive the first zoom lens barrel 21 to move through the driving column 62, and in order to enhance the stability of the movement of the first zoom lens barrel 21 along the depth direction of the installation channel, a plurality of sets of the driving chutes 61 and the driving column 62 are provided, the invention does not limit the specific shape of the driving column 62 to be cylindrical or square, and the driving chutes 61 are correspondingly provided.

Further, a second transmission mechanism is arranged between the housing 1 and the driving cylinder 5, the second transmission mechanism comprises a plurality of sliding chutes 71 and a plurality of sliding columns 72 which are matched with each other, each sliding chute 71 and the depth direction of the installation channel are obliquely arranged, the plurality of sliding chutes 71 are circumferentially arranged on the inner wall surface of the housing 1 at intervals, and the plurality of sliding columns 72 are correspondingly arranged on the outer wall surface of the driving cylinder 5. When the driving cylinder 5 rotates, the sliding column 72 slides in the sliding chute 71, so that the driving cylinder 5 moves in the mounting channel depth direction, that is, when the driving cylinder 5 rotates, the driving cylinder 5 can move in the mounting channel depth direction, and the first zoom lens barrel 21 also moves in the mounting channel depth direction, the total moving stroke is larger, and a larger zoom magnification can be obtained.

The slide chute 71 is inclined linearly or nearly linearly.

Compared with the prior art, the invention has the advantages that the transmission structure 4 is arranged, after a certain force is applied, the first gear 41 and the transmission wheel 42 are separated, the holding force of the driving motor cannot be transmitted to the driving cylinder 5, and simultaneously the first zooming component and the second zooming component are both linearly movable parts, so that when the first zooming component is pressed and retracted by an external force, the second zooming component can be forced to return to a compressed state.

In another embodiment, referring to fig. 11, the second transmission mechanism includes a plurality of sliding chutes 71 and a plurality of driving sliding strips 73 that are matched with each other, each sliding chute 71 is arranged in an inclined manner with respect to the depth direction of the installation channel, the plurality of sliding chutes 71 are arranged on the inner wall surface of the housing at intervals along the circumferential direction, and the plurality of driving sliding strips 73 are correspondingly arranged on the outer wall surface of the driving cylinder 5. The drive slide 73 is provided in a form having a larger contact area than the slide column 72, and can be guided doubly in cooperation with the slide chute 71. In this embodiment, the number of the slide chutes 71 and the drive slide 43 is set to 6.

Further, each driving slide bar 43 has an attaching side surface, two first correcting protrusions 731 arranged at intervals along the depth direction of the installation channel are convexly arranged on the attaching side surface, and the two first correcting protrusions 731 abut against the side wall surface of the sliding chute 71. A correction plane is formed between the two first correction protrusions 731, and the thickness of each first correction protrusion 731 is adjusted, so that the fit clamping stagnation of the sliding chute 71 and the driving slider 73 caused by machining errors is eliminated, and the process of sliding up and down is smoother.

In the manufacturing process, under the influence of processing errors, after the assembly is completed, there may be a large deviation in the coaxiality between the driving cylinder 5 and the housing inner cylinder, and for this purpose, the outer wall surface of the driving cylinder 5 is provided with a plurality of second correction protrusions 52 in a protruding manner, the plurality of second correction protrusions 52 are arranged at intervals from the plurality of driving slides 73, and the plurality of second correction protrusions 52 abut against the inner wall surface of the housing inner cylinder. The second correcting lugs 52 are distributed in a row, are respectively arranged in two circles at intervals along the outer wall surface of the driving cylinder 5 and avoid the driving slide bar 73, the second correcting lugs 52 are arranged to protrude out of the outer wall surface of the driving cylinder 5 to form a correcting surface together, and the coaxiality between the driving cylinder 5 and the inner cylinder of the shell can be adjusted by adjusting the thickness of each second correcting lug 52, so that a better matching effect is achieved.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.