A telescopic zoom lens

Abstract

The invention discloses a telescopic zoom lens, comprising a housing, a mounting channel formed in the housing, one end of the mounting channel being an object side end, a first zoom assembly, a second zoom assembly, a focusing assembly and a third zoom assembly being arranged in the mounting channel and in sequence from the object side end; the first zoom assembly comprises a first zoom lens barrel and a first zoom lens arranged in the first zoom lens barrel; the second zoom assembly comprises a second zoom lens barrel and a second zoom lens arranged in the second zoom lens barrel; the focusing assembly comprises a focusing lens barrel and a focusing lens arranged in the focusing lens barrel; and the first zoom assembly comprises a third zoom lens barrel and a third zoom lens arranged in the third zoom lens barrel; the first zoom lens barrel, the second zoom lens barrel, the focusing lens barrel and the third zoom lens barrel are adjustable along the depth direction of the mounting channel. The lens barrel of the invention can be telescopic, which reduces the length of the device and also ensures a larger zoom ratio and light flux.

Description

Technical Field

[0001] The present invention relates to the technical field of optical lenses, and in particular to a telescopic zoom lens. Background Art

[0002] Currently, all mobile phones sold on the market are equipped with multiple optical camera modules. The optical system of traditional mobile phone camera modules is designed to be fixed-focus, and later zoom modules with movable lens groups were developed. The thickness of mobile phones is limited to a certain extent, which makes the movement range of movable lenses relatively limited. In order to overcome the disadvantage that the movement range of movable lens groups is limited by the thickness of mobile phones, R&D personnel proposed a zoom lens with a periscope structure. This structure introduces a right-angle reflecting prism as an optical element. The reflecting prism reflects the incident light to be transmitted perpendicular to the thickness of the mobile phone, which greatly lengthens the total length of the zoom lens system, expands the movement range of the zoom lens group, and thus increases the optical zoom ratio. However, in the periscope structure, the diameter of the lens is limited by the thickness of the mobile phone, making the lens diameter relatively small, which reduces the light flux of the zoom optical module and affects the imaging quality. Summary of the invention

[0003] The main purpose of the present invention is to provide a telescopic zoom lens, aiming to solve the problem that the zoom lens in the prior art has an excessively long total length and a small lens diameter.

[0004] To achieve the above object, the present invention provides a telescopic zoom lens, comprising a housing, wherein a mounting channel is formed in the housing, wherein one end of the mounting channel is an object side end, and the other end is an image side end, wherein the mounting channel is provided in sequence from the object side end to the image side end:

[0005] A first zoom assembly, the first zoom assembly comprising a first zoom lens barrel and a first zoom lens disposed in the first zoom lens barrel;

[0006] A second zoom assembly, the second zoom assembly comprising a second zoom lens barrel and a second zoom lens disposed in the second zoom lens barrel;

[0007] A focusing assembly, the focusing assembly comprising a focusing lens barrel and a focusing lens disposed in the focusing lens barrel; and

[0008] A third zoom assembly, the third zoom assembly comprising a third zoom lens barrel and a third zoom lens disposed in the third zoom lens barrel;

[0009] Wherein, the first zoom lens barrel, the second zoom lens barrel, the focus lens barrel and the third zoom lens barrel are adjustable along the depth direction of the installation channel.

[0010] Optionally, it further comprises a driving cylinder, wherein the driving cylinder is rotatably and adjustably mounted in the mounting channel;

[0011] The first zoom assembly and the second zoom assembly are both arranged on the inner side of the driving cylinder, and a first transmission mechanism is provided between the first zoom lens barrel, the second zoom lens barrel and the driving cylinder, and the first transmission mechanism is used to convert the rotation of the driving cylinder into the movement of the first zoom lens barrel or the second zoom lens barrel along the depth direction of the installation channel.

[0012] Optionally, the first transmission mechanism includes a driving bevel groove and a driving column that cooperate with each other, the driving bevel groove is arranged at an angle to the depth direction of the installation channel, one of the driving bevel groove and the driving column is arranged on the first zoom lens barrel or the second zoom lens barrel, and the other is arranged on the driving barrel, so that when the driving barrel rotates, the first zoom lens barrel and the second zoom lens barrel are driven to move along the depth direction of the installation channel.

[0013] Optionally, a fixing cylinder is also provided in the installation channel, and the fixing cylinder is located inside the driving cylinder, and a guide hole for accommodating the driving column is extended along the circumference of the fixing cylinder along the depth direction of the installation channel, and the driving column passes through the guide hole and is guided by the guide hole to limit the circumferential rotation of the guide column.

[0014] Optionally, a second transmission mechanism is arranged between the driving cylinder and the mounting channel, and the second transmission mechanism includes a sliding bevel and a sliding column, and the sliding bevel is arranged at an inclination with respect to the depth direction of the mounting channel, and one of the sliding bevel and the sliding column is arranged on the side wall of the mounting channel, and the other is arranged on the driving cylinder, so that when the driving cylinder rotates, it drives itself to move along the depth direction of the mounting channel.

[0015] Optionally, it further includes a first driving mechanism, which is installed on the shell and drives the driving cylinder to rotate through a third transmission mechanism.

[0016] Optionally, the first drive mechanism has a rotatable drive end;

[0017] The third transmission mechanism includes a gear ring arranged on the outer periphery of the driving cylinder and a gear set meshing with the gear ring, and the driving end is connected to a gear in the gear set so as to drive the gear set to mesh with the gear ring through the driving end.

[0018] Optionally, a second driving mechanism is further included, wherein the second driving mechanism is mounted on the housing, and the second driving mechanism drives the third zoom lens barrel to move along the depth direction of the mounting channel through a fourth transmission mechanism.

[0019] Optionally, the second driving mechanism has a rotatable driving shaft, and the driving shaft is arranged along the depth direction of the installation channel;

[0020] The fourth transmission mechanism includes a connecting portion extending outward from the outer circumference of the third zoom lens barrel and a screw connected to the driving shaft. The connecting portion is disposed in a threaded hole at one end away from the third zoom lens barrel, and the screw cooperates with the threaded hole.

[0021] Optionally, the focusing assembly includes a VCM motor, the VCM motor is installed on the third zoom lens barrel, and the driving end of the VCM motor is connected to the focusing lens barrel to drive the focusing lens barrel to move along the depth direction of the installation channel.

[0022] In the technical solution of the present invention, an installation channel is formed in the shell, and a first zoom assembly, a second zoom assembly, a focus assembly and a third zoom assembly are arranged in sequence from the object side end to the image side end in the installation channel, and the first zoom assembly, the second zoom assembly, the focus assembly and the third zoom assembly can be adjusted along the depth direction of the installation channel, that is, the first zoom assembly, the second zoom assembly, the focus assembly and the third zoom assembly can be telescopically arranged in the installation channel, and when a larger zoom ratio is required, the first zoom assembly and the second zoom assembly extend out of the shell, at this time, the first zoom assembly, the second zoom assembly and the third zoom assembly can be adjusted along the depth direction of the installation channel. The distance between the second zoom component and the third zoom component changes to achieve the zoom function, and the focusing component is also adjusted along the depth direction of the installation channel to achieve the focusing function. A larger zoom ratio can be obtained by jointly adjusting the first zoom component, the second zoom component, the focusing component and the third zoom component. Moreover, the diameter of the lens of the present invention is not limited by the thickness of the mobile phone, and the diameter of the lens can be increased to obtain a higher light flux. Because the first zoom component, the second zoom component, the focusing component and the third zoom component can be telescopically arranged, the total length of the entire zoom lens is greatly reduced, which is conducive to the miniaturization of the entire zoom lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 An exploded schematic diagram of an embodiment of a telescopic zoom lens of the present invention;

[0025] Figure 2 for Figure 1 A cross-sectional view of a telescopic zoom lens;

[0026] Figure 3 for Figure 1 A three-dimensional schematic diagram of the middle drive cylinder;

[0027] Figure 4 for Figure 1 A three-dimensional schematic diagram of the first zoom assembly;

[0028] Figure 5 for Figure 1 A three-dimensional schematic diagram of the second zoom assembly;

[0029] Figure 6 for Figure 1 A three-dimensional schematic diagram of the center focusing assembly;

[0030] Figure 7 for Figure 1 A three-dimensional schematic diagram of the third zoom assembly and the second driving mechanism;

[0031] Figure 8 for Figure 1 A three-dimensional schematic diagram of the first driving mechanism and the third transmission mechanism.

[0032] Label name Label name 100 Telescopic zoom lens 1 case 11 Installation channel 12 Object side 13 Image side 2 First zoom component 21 First zoom lens barrel 22 First zoom lens 3 Second zoom unit 31 Second zoom lens barrel 32 Second zoom lens 4 Focusing components 41 Focusing barrel 42 Focus lens 43 VCM Motor 5 The third zoom component 51 Third zoom lens 52 Third zoom lens 6 Drive cylinder 611 Drive chute 611a First drive chute 611b Second drive chute 612 Drive column 612a First drive column 612b Second drive column 621 Sliding chute 622 Sliding column 7 Fixed cylinder 71 Guide hole 8 The first driving mechanism 81 The third transmission mechanism 811 Ring gear 812 Gear Set 9 Second driving mechanism 91 Fourth transmission mechanism

[0033] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] Currently, all mobile phones sold on the market are equipped with multiple optical camera modules. The optical system of traditional mobile phone camera modules is designed to be fixed-focus, and later zoom modules with movable lens groups were developed. The thickness of mobile phones is limited to a certain extent, which makes the movement range of movable lenses relatively limited. In order to overcome the disadvantage that the movement range of movable lens groups is limited by the thickness of mobile phones, R&D personnel proposed a zoom lens with a periscope structure. This structure introduces a right-angle reflecting prism as an optical element. The reflecting prism reflects the incident light to be transmitted perpendicular to the thickness of the mobile phone, which greatly lengthens the total length of the zoom lens system, expands the movement range of the zoom lens group, and thus increases the optical zoom ratio. However, in the periscope structure, the diameter of the lens is limited by the thickness of the mobile phone, making the lens diameter relatively small, which reduces the light flux of the zoom optical module and affects the imaging quality.

[0038] In view of this, the present invention provides a telescopic zoom lens. Figures 1 to 8 An embodiment of a telescopic zoom lens provided by the present invention is described below with reference to specific drawings.

[0039] Please refer to Figure 1 to Figure 2The telescopic zoom lens 100 comprises a housing 1, wherein a mounting channel 11 is formed in the housing 1, wherein one end of the mounting channel 11 is an object side end 12, and the other end is an image side end 13, wherein a first zoom assembly 2, a second zoom assembly 3, a focus assembly 4 and a third zoom assembly 5 are sequentially arranged in the mounting channel 11 from the object side end 12 to the image side end 13; the first zoom assembly 2 comprises a first zoom lens barrel 21 and a first zoom lens 22 arranged in the first zoom lens barrel 21; the second zoom assembly 3 It includes a second zoom lens barrel 31 and a second zoom lens 32 arranged in the second zoom lens barrel 31; the focusing assembly 4 includes a focusing lens barrel 41 and a focusing lens 42 arranged in the focusing lens barrel 41; and the third zoom assembly 5 includes a third zoom lens barrel 51 and a third zoom lens 52 arranged in the third zoom lens barrel 51; wherein the first zoom lens barrel 21, the second zoom lens barrel 31, the focusing lens barrel 41 and the third zoom lens barrel 51 are adjustable along the depth direction of the installation channel 11.

[0040] In the technical solution of the present invention, an installation channel 11 is formed in the shell 1, and a first zoom assembly 2, a second zoom assembly 3, a focus assembly 4 and a third zoom assembly 5 are sequentially arranged in the installation channel 11 from the object side end 12 to the image side end 13, and the first zoom assembly 2, the second zoom assembly 3, the focus assembly 4 and the third zoom assembly 5 can be adjustable along the depth direction of the installation channel 11, that is, the first zoom assembly 2, the second zoom assembly 3, the focus assembly 4 and the third zoom assembly 5 can be telescopically arranged in the installation channel 11, and when a larger zoom ratio is required, the first zoom assembly 2 and the second zoom assembly 3 extend out of the shell 1, and at this time, the distance between the first zoom assembly 2, the second zoom assembly 3 and the third zoom assembly 5 changes to achieve a zoom ratio. The focusing function is realized, and the focusing component 4 can also be adjusted along the depth direction of the installation channel 11 to realize the focusing function, and the focusing component 4 is arranged between the second zoom component 3 and the third zoom component 5, which is beneficial to reducing the overall stacking volume, that is, the volume is smaller under the same zoom ratio. The present invention can obtain a larger zoom ratio by jointly adjusting the first zoom component 2, the second zoom component 3, the focusing component 4 and the third zoom component 5, and the lens diameter of the present invention is not limited by the thickness of the mobile phone, and the diameter of the lens can be increased to obtain a higher light flux. Because the first zoom component 2, the second zoom component 3, the focusing component 4 and the third zoom component 5 can be telescopically arranged, the total length of the entire zoom lens is greatly reduced, which is beneficial to the miniaturization of the entire zoom lens.

[0041] For further information, please refer to Figures 3 to 5In order to allow the first zoom lens 21 and the second zoom lens barrel 31 to be adjustable along the depth direction of the installation channel 11, the telescopic zoom lens 100 also includes a driving tube 6, and the driving tube 6 is rotatably and adjustably installed in the installation channel 11; the first zoom assembly 2 and the second zoom assembly 3 are both arranged on the inner side of the driving tube 6, and a first transmission mechanism is provided between the first zoom lens barrel 21 and the second zoom lens barrel 31 and the driving tube 6, and the first transmission mechanism is used to convert the rotation of the driving tube 6 into the movement of the first zoom lens barrel 21 or the second zoom lens barrel 31 along the depth direction of the installation channel 11, and the first zoom lens barrel 21 and the second zoom lens barrel 31 can be driven to move simultaneously through the driving tube 6, with higher synchronization, and it is beneficial to reduce the driving device.

[0042] There is no limitation on the specific form of transmission realized by the first transmission mechanism, which may be achieved by means of internal and external thread matching or by means of a cam mechanism. Specifically, in the present embodiment, the first transmission mechanism is a cam mechanism, i.e., the first transmission mechanism includes a driving bevel 611 and a driving column 612 that cooperate with each other, and the driving bevel 611 is arranged at an angle to the depth direction of the installation channel 11. One of the driving bevel 611 and the driving column 612 is arranged on the first zoom lens barrel 21 or the second zoom lens barrel 31, and the other is arranged on the driving tube 6, so that when the driving tube 6 rotates, the first zoom lens barrel 21 and the second zoom lens barrel 31 are driven to move in the depth direction of the installation channel 11. More specifically, the driving inclined groove 611 includes a first driving inclined groove 611a and a second driving inclined groove 611b arranged on the inner wall of the driving cylinder 6, and the driving column 612 includes a first driving column 612a arranged on the outer periphery of the first zoom lens barrel 21 and a second driving column 612b arranged on the outer periphery of the second zoom lens barrel 31, the first driving inclined groove 611a cooperates with the first driving column 612a, and the second driving inclined groove 611b cooperates with the second driving column 612b, and when the driving cylinder 6 rotates, the first driving column 612a is in the first driving inclined groove. The first zoom lens barrel 21 and the second zoom lens barrel 31 are driven to move by the sliding of the driving column 612 in the driving inclined groove 611, and the first driving column 611a and the first driving column 611a are provided with three groups, and the second driving inclined groove 611b and the second driving column 611b are also provided with three groups in order to enhance the stability of the first zoom lens barrel 21 and the second zoom lens barrel 31 moving along the depth direction of the installation channel 11.

[0043] In the present embodiment, the telescopic zoom lens 100 is further provided with a protective device, wherein the first zoom lens barrel 21 comprises a barrel body and a connecting member, wherein the barrel body is provided with a first zoom lens 22, and a first driving column 612a is provided on the periphery of the connecting member, wherein the barrel body can be elastically and telescopically installed on the connecting member so that the barrel body has an active stroke along the depth direction of the mounting channel 11, and when the telescopic zoom lens 100 is subjected to strong external pressure, falls or is hit, the barrel body moves toward the connecting member, causing the captured image to become blurred, and transmits a signal to the control system, and the control system controls the driving mechanism to retract the entire zoom assembly into the housing 1, thereby achieving the purpose of protecting the telescopic zoom lens 100.

[0044] Specifically, in order to ensure that the first zoom lens barrel 21 and the second zoom lens barrel 31 do not rotate with the driving cylinder 6 when they move along the depth direction of the installation channel 11 under the drive of the driving cylinder 6, a fixed cylinder 7 is also provided in the installation channel 11. The fixed cylinder 7 is located on the inner side of the driving cylinder 6, and the fixed cylinder 7 extends circumferentially along the depth direction of the installation channel 11 to provide a guide hole 71 for accommodating the driving column 612. The driving column 612 passes through the guide hole 71 and is guided by the guide hole 71 to limit the circumferential rotation of the guide column 612, so that the first zoom lens barrel 21 and the second zoom lens barrel 31 can only move along the depth direction of the installation channel 11, thereby improving the movement accuracy of the first zoom lens barrel 21 and the second zoom lens barrel 31 and achieving the effect of accurately adjusting the zoom ratio.

[0045] The distance between the lenses can affect the zoom ratio of the lens, so in order to obtain a larger zoom ratio and make the first zoom lens barrel 21 and the second zoom lens barrel 31 obtain more telescopic amount, a second transmission mechanism is arranged between the driving cylinder 6 and the mounting channel 11, and the second transmission mechanism includes a sliding bevel 621 and a slide column 622, and the sliding bevel 621 is arranged at an angle with respect to the depth direction of the mounting channel 11, and one of the sliding bevel 621 and the slide column 622 is arranged on the side wall of the mounting channel 11, and the other is arranged on the driving cylinder 6, so that when the driving cylinder 6 rotates, it drives itself to move in the depth direction of the mounting channel 11. Specifically, in the present embodiment, the sliding bevel 621 is arranged on the side wall of the mounting channel 11, and the slide column 622 is arranged On the outer circumference of the driving cylinder 6, three sliding grooves 621 are evenly arranged, and similarly, three sliding posts 622 are also arranged. The sliding posts 622 are arranged in the driving grooves 621. When the driving cylinder 6 rotates, the sliding posts 622 slide in the sliding grooves 621, so that the driving cylinder 6 moves along the depth direction of the mounting channel 11. That is, when the driving cylinder 6 rotates, the driving cylinder 6 can move along the depth direction of the mounting channel 11, and the first zoom lens barrel 21 and the second zoom lens barrel 31 also move along the depth direction of the mounting channel 11. By extending and retracting the driving cylinder 6 in the direction of the mounting channel 11, the distance between the first zoom lens barrel 21 and the second zoom lens barrel 31 relative to the third zoom lens barrel 51 can be increased, so that a larger zoom ratio can be obtained.

[0046] Please refer to Figure 8 Since the driving cylinder 6 can rotate in the installation channel 11, the telescopic zoom lens 100 also includes a first driving mechanism 8, which is installed on the housing 1. The first driving mechanism 8 drives the driving cylinder 6 to rotate through the third transmission mechanism 81. The driving cylinder 6 is driven to rotate by the first driving mechanism 8, which effectively reduces the number of driving devices and the size of the zoom lens, thereby reducing the difficulty and requirements of controlling multiple zoom components, and can achieve coordinated linkage of multiple zoom components to realize follow-up and clearing during the zoom process.

[0047] Furthermore, the first driving mechanism 8 has a rotatable driving end; the third transmission mechanism 81 includes a gear ring 811 disposed on the outer periphery of the driving cylinder 6 and a gear set 812 meshing with the gear ring 811, and the driving end is connected to a gear in the gear set 812, so as to drive the gear set 812 to mesh with the gear ring 811 through the driving end. In this embodiment, the first driving mechanism 8 is a stepping motor, and the main shaft of the stepping motor is arranged toward the depth direction of the installation channel 11, the main shaft of the stepping motor is connected to the gear at the head end of the gear set 812, and the gear ring 811 meshes with the gear at the tail end of the gear set 812, so as to drive the driving cylinder 6 to rotate through the stepping motor.

[0048] Please refer to Figure 7 Because the third zoom lens barrel 51 can also move along the depth direction of the installation channel 11, the telescopic zoom lens 100 also includes a second driving mechanism 9, which is installed on the housing 1. The second driving mechanism 9 drives the third zoom lens barrel 51 to move along the depth direction of the installation channel 11 through a fourth transmission mechanism 91.

[0049] Furthermore, the second driving mechanism 9 has a rotatable driving shaft, and the driving shaft is arranged along the direction of the depth 11 of the installation channel; the fourth transmission mechanism 91 includes a connecting portion extending outward from the outer periphery of the third zoom lens barrel 51 and a screw rod connected to the driving shaft, and the connecting portion is penetrated by a threaded hole at one end away from the third zoom lens barrel 51, and the screw rod cooperates with the threaded hole.

[0050] Please refer to Figure 6 The focusing assembly 4 can also move along the depth direction of the installation channel 11, so the focusing assembly 4 also includes a VCM motor 43. The VCM motor 7 is the abbreviation of Vioce Coil Motor, that is, a voice coil motor. The VCM motor 43 is installed on the third zoom lens barrel 51. The driving end of the VCM motor 43 is connected to the focusing lens barrel 41 to drive the focusing lens barrel 41 to move along the depth direction of the installation channel 11. In this embodiment, the VCM motor 43 includes a coil, a yoke and a magnet. The yoke is penetrated by a through hole, the magnet is arranged on one side of the through hole, and the yoke is installed on the third zoom lens barrel 51. The coil is nested with the yoke and is located on the opposite side of the magnet. The coil is installed on the focus lens barrel 41. When the coil is energized, under the action of the yoke and the magnet, the focus lens barrel 41 can move along the depth direction of the installation channel 11. The VCM motor 43 has the advantages of no wear, no step-out, low noise, low power consumption, etc., and can better meet the market demand and the increasingly high requirements of customers.

[0051] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A telescopic zoom lens, characterized in that: The invention comprises a shell, wherein a mounting channel is formed in the shell, wherein one end of the mounting channel is an object side end, and the other end is an image side end, and wherein the mounting channel is provided in sequence from the object side end to the image side end: A first zoom assembly, the first zoom assembly comprising a first zoom lens barrel and a first zoom lens disposed in the first zoom lens barrel; A second zoom assembly, the second zoom assembly comprising a second zoom lens barrel and a second zoom lens disposed in the second zoom lens barrel; A focusing assembly, the focusing assembly comprising a focusing lens barrel and a focusing lens arranged in the focusing lens barrel; A third zoom assembly, the third zoom assembly comprising a third zoom lens barrel and a third zoom lens disposed in the third zoom lens barrel; as well as, A driving cylinder, the driving cylinder is rotatably and adjustably mounted in the mounting channel; Wherein, the first zoom lens barrel, the second zoom lens barrel, the focus lens barrel and the third zoom lens barrel are adjustable along the depth direction of the installation channel; The first zoom assembly and the second zoom assembly are both arranged on the inner side of the driving cylinder, and a first transmission mechanism is arranged between the first zoom lens barrel, the second zoom lens barrel and the driving cylinder, and the first transmission mechanism is used to convert the rotation of the driving cylinder into the movement of the first zoom lens barrel and the second zoom lens barrel along the depth direction of the installation channel; A second transmission mechanism is provided between the driving cylinder and the mounting channel, the second transmission mechanism comprising a sliding inclined groove and a sliding column, the sliding inclined groove is arranged at an inclination with respect to the depth direction of the mounting channel, one of the sliding inclined groove and the sliding column is arranged on the side wall of the mounting channel, and the other is arranged on the driving cylinder, so that when the driving cylinder rotates, it drives itself to move along the depth direction of the mounting channel; The first zoom lens barrel comprises a barrel body and a connecting piece, wherein the barrel body can be elastically and telescopically mounted on the connecting piece so that the barrel body has a movable stroke along the depth direction of the mounting channel.

2. The telescopic zoom lens according to claim 1, wherein: The first transmission mechanism includes a driving bevel groove and a driving column that cooperate with each other. The driving bevel groove is arranged at an angle to the depth direction of the installation channel. One of the driving bevel groove and the driving column is arranged on the first zoom lens barrel or the second zoom lens barrel, and the other is arranged on the driving barrel, so that when the driving barrel rotates, the first zoom lens barrel and the second zoom lens barrel are driven to move along the depth direction of the installation channel.

3. The telescopic zoom lens according to claim 2, wherein: A fixing cylinder is also provided in the installation channel. The fixing cylinder is located inside the driving cylinder, and a guide hole for accommodating the driving column is extended along the circumference of the fixing cylinder along the depth direction of the installation channel. The driving column passes through the guide hole and is guided by the guide hole to limit the circumferential rotation of the driving column.

4. The telescopic zoom lens according to claim 1, wherein: It also includes a first driving mechanism, which is installed on the shell and drives the driving cylinder to rotate through a third transmission mechanism.

5. The telescopic zoom lens according to claim 4, wherein: The first drive mechanism has a rotatable drive end; The third transmission mechanism includes a gear ring arranged on the outer periphery of the driving cylinder and a gear set meshing with the gear ring, and the driving end is connected to a gear in the gear set so as to drive the gear set to mesh with the gear ring through the driving end.

6. The telescopic zoom lens according to claim 1, wherein: It also includes a second driving mechanism, which is installed on the housing and drives the third zoom lens barrel to move along the depth direction of the installation channel through a fourth transmission mechanism.

7. The telescopic zoom lens according to claim 6, wherein: The second driving mechanism has a rotatable driving shaft, and the driving shaft is arranged along the depth direction of the installation channel; The fourth transmission mechanism includes a connecting portion extending outward from the outer circumference of the third zoom lens barrel and a screw connected to the driving shaft. The connecting portion is disposed in a threaded hole at one end away from the third zoom lens barrel, and the screw cooperates with the threaded hole.

8. The telescopic zoom lens according to claim 1, wherein: The focusing assembly includes a VCM motor, which is installed on the third zoom lens barrel. The driving end of the VCM motor is connected to the focusing lens barrel to drive the focusing lens barrel to move along the depth direction of the installation channel.

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