Double-view-field lens adjusting mechanism

Abstract

The invention provides a double-view-field lens adjusting mechanism which has the axial front-back direction and comprises a main lens cone, a focusing set, a zooming set, a focusing hand wheel and a zooming hand wheel, the focusing set and the zooming set are arranged in the main lens cone in the axial direction and are mutually crossed and avoided, and the zooming hand wheel is rotatably arranged outside the main lens cone and is mutually staggered with the zooming set in the axial direction. And the focusing hand wheel is rotatably arranged outside the main lens cone, is staggered with the focusing group in the axial direction, and is used for driving the focusing group to move back and forth in the axial direction. According to the invention, the focusing group and the zooming group are designed to intersect with each other, so that the axial movement strokes of the focusing group and the zooming group avoid each other and do not interfere with each other, thereby achieving the cross placement of the independent cross-type movement mechanism, the zooming hand wheel and the focusing hand wheel, and meeting the optical characteristics and product requirements. Focusing and zooming can be manually and independently controlled and do not interfere with each other, large and small view fields can be rapidly switched, local virtual focus is avoided, and the shooting quality and the product quality are improved.

Description

Technical Field

[0001] The present application relates to the technical field of optical lenses, and in particular to a dual-field-of-view lens adjustment mechanism. Background Art

[0002] At present, there are two main types of dual-field lenses on the market: electrically adjustable and manually adjustable. Among them, the electrically adjustable lens has an external motor drive, so the overall size of the lens is larger and is mostly used in handheld products; the manually adjustable lens is more used in sighting products due to its advantages of lightness, convenience, and high reliability. Among the existing manually adjustable dual-field lenses, there are those that integrate the zoom and focus, and realize the field of view switching and focusing in steps by rotating and pressing; there are also those that set the focus on the zoom wheel. When the zoom wheel rotates, the focusing hand wheel and lens will also rotate, such as the existing patents CN218332126U, CN218298632U, and CN216561163U. For some non-spherical or eccentric lenses with high requirements, the above-mentioned designs of integrating the zoom and focus or setting the focus on the zoom wheel are prone to cause local defocus. Therefore, how to design a dual-field lens in which the focus and zoom are manually and independently controlled and do not interfere with each other is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0003] In view of this, the present application provides a dual-field-of-view lens adjustment mechanism, which can effectively solve the problem that the existing dual-field-of-view lens is prone to causing local out-of-focus.

[0004] The present application provides a dual-field lens adjustment mechanism, which has an axial front-to-back direction, and comprises a main lens barrel, a focusing group, a magnification group, a focusing hand wheel and a magnification hand wheel, wherein the focusing group and the magnification group are axially arranged in the main lens barrel and cross and avoid each other; the magnification hand wheel is rotatably mounted outside the main lens barrel and is staggered with the magnification group in the axial direction, so as to drive the magnification group to move forward and backward in the axial direction; the focusing hand wheel is rotatably mounted outside the main lens barrel and is staggered with the focusing group in the axial direction, so as to drive the focusing group to move forward and backward in the axial direction.

[0005] In one embodiment, the zoom hand wheel is correspondingly arranged on the radial outer side of the focusing group, and the focusing hand wheel is correspondingly arranged on the radial outer side of the zoom group.

[0006] In one embodiment, the magnification hand wheel is rotatably mounted outside the main lens barrel, and the magnification hand wheel is coaxially arranged with the main lens barrel; the focusing hand wheel is rotatably mounted on one side of the main lens barrel, and the rotation axis of the focusing hand wheel is perpendicular to the central axis of the main lens barrel.

[0007] In one embodiment, the focusing group includes a first slide, a first lens fixed to the first slide, and a first slide arm connected to the first slide and extending to the rear side; the magnification group includes a second slide, a second lens fixed to the front end of the second slide, a third lens fixed to the rear end of the second slide, and a second slide arm connected to the second slide and extending to the front side; the first slide arm and the second slide arm cross and avoid each other.

[0008] In one embodiment, the zoom hand wheel extends toward the rear side to form a convex plate, the convex plate is provided with a driving inclined groove, and the second sliding arm is provided with a first guide column, and the first guide column can be slidably matched with the driving inclined groove.

[0009] In one embodiment, two second sliding arms are symmetrically arranged, the two second sliding arms are respectively arranged with the first guide column, two driving inclined grooves are arranged, the two first guide columns can be slidably matched with the corresponding driving inclined grooves, and the inclination directions of the two driving inclined grooves are opposite.

[0010] In one embodiment, the zoom hand wheel is provided with an internal thread, the second sliding arm is provided with an external thread, and the internal thread is threadably connected to the external thread.

[0011] In one embodiment, a second guide post is provided on the outer wall of the first sliding arm, an eccentric groove is provided on the inner side of the focusing hand wheel, and the second guide post can be slidably matched with the eccentric groove.

[0012] In one embodiment, a first axial slide and a second axial slide are provided on the inner wall of the main lens barrel, the focusing group can be slidably set on the first axial slide, and the magnification group can be slidably set on the second axial slide; and / or, the dual-field lens adjustment mechanism includes a calibration ring, which is fixedly mounted on the outside of the main lens barrel and cooperates with the circumferential limit of the magnification hand wheel to limit the rotation angle of the magnification hand wheel.

[0013] In one embodiment, the dual-field-of-view lens adjustment mechanism also includes a lens cover assembly or a magnification hand wheel pressure ring, and the lens cover assembly or the magnification hand wheel pressure ring is fixedly connected to the front end of the main lens barrel and limits the magnification hand wheel; and / or, a toggle portion is provided on the outer wall of the magnification hand wheel.

[0014] In summary, the present application provides a dual-field lens adjustment mechanism having an axial front-to-back direction, comprising a main lens barrel, a focusing group, a magnification group, a focusing handwheel and a magnification handwheel, wherein the focusing group and the magnification group are axially arranged in the main lens barrel and cross and avoid each other, the magnification handwheel is rotatably mounted outside the main lens barrel and axially interlaced with the magnification group for driving the magnification group to move forward and backward in the axial direction, and the focusing handwheel is rotatably mounted outside the main lens barrel and axially interlaced with the focusing group for driving the focusing group to move forward and backward in the axial direction. The present application designs the focusing group and the magnification group to cross each other, so that the axial movement strokes between the two avoid each other and do not interfere with each other, thereby realizing an independent cross-type motion mechanism. At the same time, the magnification handwheel and the magnification group are cross-staggered in the axial direction, and the focusing handwheel and the focusing group are cross-staggered in the axial direction, which meets the optical characteristics and product requirements, and realizes that the focusing and magnification can be manually and independently controlled without interfering with each other, and the large and small fields of view can be quickly switched, thereby avoiding problems such as local out of focus, and improving shooting and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of a dual-field-of-view lens adjustment mechanism at an angle in one embodiment of the present application.

[0016] Figure 2 for Figure 1 A three-dimensional schematic diagram of the dual-field-of-view lens adjustment mechanism at another angle.

[0017] Figure 3 for Figure 1 A side cross-sectional view of the dual-field lens adjustment mechanism at the focus hand wheel.

[0018] Figure 4 for Figure 1 A cross-sectional view of the dual-field lens adjustment mechanism at the focusing hand wheel.

[0019] Figure 5 for Figure 1 A cross-sectional view of the dual-field-of-view lens adjustment mechanism at the limit block.

[0020] Figure 6 for Figure 1 Schematic diagram of the exploded view of the dual-field lens adjustment mechanism.

[0021] Figure 7 for Figure 1 Schematic diagram of the exploded view of the zoom handwheel and calibration ring.

[0022] Figure 8 for Figure 1 Schematic diagram of the exploded view of the center rear housing and focusing hand wheel.

[0023] Fig. 9 for Figure 1Schematic diagram of the optical system structure of the dual-field lens adjustment mechanism.

[0024] Fig.10 It is a three-dimensional schematic diagram of a dual-field-of-view lens adjustment mechanism in another embodiment of the present application.

[0025] Fig.11 for Fig.10 A side cross-sectional view of the dual-field lens adjustment mechanism at the focus hand wheel.

[0026] Fig.12 for Fig.10 Schematic diagram of the exploded view of the dual-field lens adjustment mechanism.

[0027] Reference numerals: 2-dual-field-of-view lens adjustment mechanism; 10-main lens barrel; 12-focusing group; 14-zooming group; 16-focusing hand wheel; 18-zooming hand wheel; 20-rear housing; 22-first slide; 24-first lens; 26-first slide arm; 28-second slide; 30-second lens; 32-third lens; 34-second slide arm; 36-convex plate; 38-driving inclined groove; 40-first guide column; 42-internal thread; 44-external thread; 46-second guide column; 48 -eccentric groove; 50-first axial slide; 52-second axial slide; 54-calibration ring; 56-lens cover assembly; 58-zoom handwheel pressure ring; 60-sliding part; 62-limiting block; 63-top screw; 64-limiting groove; 66-handwheel clamp; 68-handwheel inner ring; 70-axial limiting sliding hole; 72-mounting seat; 74-rotating cover; 76-fixing part; 78-rotating wheel; 80-limiting part; 82-enclosing wall; 84-step; 86-infrared focal plane array. DETAILED DESCRIPTION

[0028] Before describing the embodiments in detail, it should be understood that the present application is not limited to the detailed structure or component arrangement described below or in the drawings in the present application. The present application may be an embodiment implemented in other ways. Moreover, it should be understood that the words and terms used herein are only used for descriptive purposes and should not be interpreted restrictively. The words "including", "comprising", "having" and the like used herein are meant to include the items listed thereafter, their equivalents and other additional items. In particular, when describing "a certain element", the present application does not limit the number of the element to one, but may also include multiple elements.

[0029] This application is based on the excellent self-developed optical design (CN 117539038A). Different from the traditional structure, only the three-piece structure realizes the dual-field switching function, and has the advantages of light weight and continuous clear imaging during focusing. Based on the optical characteristics, the optical focusing group is in the front and the optical zoom group is in the back, but in order to meet product requirements and facilitate users to operate quickly and accurately, the adjustment structure is required to be inverted, which inevitably requires the adjustment structure to achieve cross avoidance and independent movement.

[0030] Please also refer to Figures 1 to 12 As shown, the present application provides a dual-field lens adjustment mechanism 2, which has an axial front-to-back direction. It should be understood that the axial direction of the dual-field lens adjustment mechanism 2 is the optical axis direction. The dual-field lens adjustment mechanism 2 includes a main lens barrel 10, a focusing group 12, a zoom group 14, a focusing hand wheel 16, and a zoom hand wheel 18. The focusing group 12 and the zoom group 14 are arranged in the main lens barrel 10 along the axial direction and cross each other. The zoom hand wheel 18 is rotatably mounted outside the main lens barrel 10 and intersects with the zoom group 14 in the axial direction, and is used to drive the zoom group 14 to move forward and backward in the axial direction. The focusing hand wheel 16 is rotatably mounted outside the main lens barrel 10 and intersects with the focusing group 12 in the axial direction, and is used to drive the focusing group 12 to move forward and backward in the axial direction. The overall scheme principle of the present application is based on the idea of ​​a continuous zoom lens slide structure. By designing the focusing group and the magnification group to cross each other, the axial moving strokes between the two are avoided and do not interfere with each other, thereby realizing an independent cross-type motion mechanism. At the same time, the magnification handwheel and the magnification group are cross-staggered in the axial direction, and the focusing handwheel and the focusing group are cross-staggered in the axial direction, which meets the optical characteristics and product requirements. That is, the motion structure (focusing handwheel 16 and magnification handwheel 18) cannot be radially outside the corresponding optical components (focusing group 12 and magnification group 14), and must be placed crosswise, so that the focusing and magnification can be manually controlled independently and without interfering with each other, and the large and small fields of view can be quickly switched, thereby avoiding problems such as local out of focus, and improving shooting and product quality.

[0031] Preferably, if Figure 3 As shown, the magnification handwheel 18 is correspondingly arranged on the radially outer side of the focusing group 12, and the focusing handwheel 16 is correspondingly arranged on the radially outer side of the magnification group 14, that is, the focusing group 12 is located on the front side of the magnification group 14, and the magnification handwheel 18 is located on the front side of the focusing handwheel 16. The magnification handwheel 18 and the focusing group 12 are arranged correspondingly in the radial direction, and the focusing handwheel 16 and the magnification group 14 are arranged correspondingly in the radial direction, thereby realizing the cross-staggered placement of the motion structure and the corresponding optical components, and at the same time making the overall structure of the lens compact and the design ingenious.

[0032] The slide of the present application is longer than the common slide structure, and the transmission and locking methods are also slightly more complicated. Figure 3-5As shown, the zoom hand wheel 18 is rotatably mounted outside the main lens barrel 10, and the zoom hand wheel 18 is coaxially arranged with the main lens barrel 10; the dual-view lens adjustment mechanism 2 includes a rear shell 20, which is mounted outside the rear end of the main lens barrel 10, for example, the rear shell 20 and the main lens barrel 10 are fixed by screws, and the focus hand wheel 16 is rotatably mounted on the rear shell 20, and the rotation axis of the focus hand wheel 16 is perpendicular to the central axis of the main lens barrel 10. It should be understood that in other embodiments, the focus hand wheel 16 can also be rotatably mounted on one side of the main lens barrel 10. In this case, the dual-view lens adjustment mechanism 2 can be provided with a rear shell 20, which is mounted outside the rear end of the main lens barrel 10 and is located at the rear side of the focus hand wheel 16, or the dual-view lens adjustment mechanism 2 can also be provided with no rear shell 20.

[0033] Among them, the focusing group 12 includes a first slide 22, a first lens 24 fixed on the first slide 22, and a first slide arm 26 connected to the first slide 22 and extending to the rear side. The first lens 24 serves as an optical focusing group, and axial movement realizes focusing and temperature compensation; the zoom group 14 includes a second slide 28, a second lens 30 fixed at the front end of the second slide 28, a third lens 32 fixed at the rear end of the second slide 28, and a second slide arm 34 connected to the second slide 28 and extending to the front side. Preferably, the second slide arm 34 extends from the rear end of the second slide 28 toward the front end. The second lens 30 and the third lens 32 serve as an optical zoom group, and the overall axial movement realizes zooming. The first slide arm 26 and the second slide arm 34 cross and avoid each other, for example, the first slide arm 26 corresponds to the empty space on one side of the second slide arm 34, and the second slide arm 34 corresponds to the empty space on one side of the first slide arm 26, or the first slide arm 26 and the second slide arm 34 are staggered in the radial direction, so that the focusing group 12 and the zoom group 14 can avoid each other during the axial movement without interference. Optionally, the number of the first slide arm 26 and the second slide arm 34 can be set to two respectively, and the two first slide arms 26 and the two second slide arms 34 cross and avoid each other to achieve two-claw avoidance; or the number of the first slide arm 26 and the second slide arm 34 can be set to three respectively, and the three first slide arms 26 and the three second slide arms 34 cross and avoid each other to achieve three-claw avoidance. It should be pointed out that the first slide arm 26 and the second slide arm 34 can be set to be equal or unequal in number, and the present application does not limit the specific number of the first slide arm 26 and the second slide arm 34, as long as the first slide arm 26 and the second slide arm 34 can meet the requirement of cross and avoidance.

[0034] like Fig. 9As shown, the first lens 24, the second lens 30 and the third lens 32 are all infrared lenses, forming a three-piece dual-field infrared thermal imaging optical system, and the optical system also includes an infrared focal plane array (FPA) 86, wherein the positions of the first lens 24 and the infrared focal plane array 86 are relatively fixed, that is, the distance between the two remains unchanged, and when the zoom and focus group composed of the second lens 30 and the third lens 32 moves in the axial direction, the air interval between the second lens 30 and the third lens 32 in the axial direction remains unchanged. The first lens 24 can be a positive meniscus lens, and the material of the first lens 24 can be a germanium single crystal; the second lens 30 can be a biconcave lens or a negative meniscus lens, and the material of the second lens 30 can be a chalcogenide glass; the third lens 32 can be a positive meniscus lens, a biconvex lens or a plano-convex lens, and the material of the third lens 32 can be a germanium single crystal. The present application adopts a three-piece optical structure (a first lens 24, a second lens 30 and a third lens 32), and its optical structure adopts a "positive-negative-positive" optical focal separation type, and the "negative-positive" group is a whole, and the two maintain a fixed air interval and move together axially. Through the principle of object-image conjugate exchange, under the condition of a fixed total length, the dual-field design is realized by using optical zoom and optical lens linkage, that is, it can ensure that the image is clear at two focal length positions, so that the axial length can be greatly reduced. In addition, due to the simultaneous movement of the "negative-positive" group, while realizing the dual-field switching, the moving group can also be used as a focusing group to achieve the focus clarity of the target at different observation distances, or for focusing compensation of thermal defocus caused by changes in ambient temperature. At the same time, the optical system adopts this optical structure to effectively balance the aberrations, so that the light transitions as smoothly as possible, thereby suppressing the generation of high-order aberrations and improving the imaging quality.

[0035] In the illustrated embodiment, a toggle portion 60 is provided on the outer wall of the zoom hand wheel 18 , and the toggle portion 60 can be used as a wrench for the user to toggle to achieve the rotation of the zoom hand wheel 18 , which can facilitate user operation and mark the rotation position.

[0036] In such Figure 1-8In the illustrated embodiment, the power changing hand wheel 18 extends toward the rear side to form a convex plate 36, which is, for example, an arc shape adapted to the power changing hand wheel 18, and a driving inclined groove 38 is provided on the convex plate 36, and the inclination of the driving inclined groove 38 is, for example, set to 60°, and the second sliding arm 34 is provided with a first guide column 40, which extends radially outward and can be slidably fitted in the driving inclined groove 38. The convex plate 36 and the focusing group 12 are radially offset from each other to avoid interference. The first guide column 40 is driven in cooperation with the driving bevel groove 38. When the zoom hand wheel 18 is turned, the driving bevel groove 38 rotates circumferentially. The main lens barrel 10 limits the zoom group 14 circumferentially, so that the zoom group 14 can only move axially relative to the main lens barrel 10 but cannot rotate circumferentially. Therefore, when the driving bevel groove 38 rotates circumferentially, it will exert an axial interaction force on the first guide column 40, driving the zoom group 14 to move axially back and forth, thereby realizing rapid switching between large and small fields of view.

[0037] In the prior art, since the direction of the focus hand wheel is uncertain, it is not the best choice for left-handed users and the time required for manual operation. Figure 6-8 As shown, two second sliding arms 34 are symmetrically arranged, and two second sliding arms 34 are respectively provided with a first guide column 40, for example, the two first guide columns 40 are arranged symmetrically in the horizontal direction; correspondingly, two convex plates 36 are arranged symmetrically in the horizontal direction, two driving inclined grooves 38 are arranged, and the two driving inclined grooves 38 are respectively arranged on the corresponding convex plates 36, and the two first guide columns 40 can slide and match the corresponding driving inclined grooves 38, and the two driving inclined grooves 38 have opposite inclination directions, for example, in the front-back direction, one driving inclined groove 38 extends from bottom to top, and the other driving inclined groove 38 extends from top to bottom. Such a setting can make the zoom hand wheel 18 have two adjustment areas with opposite directions and the same zoom effect, so that the adjustment direction of the zoom hand wheel 18 is determined, and the zoom hand wheel 18 can realize the axial movement of the zoom group 14 when turning left or right, which is compatible with left-handed users, and at the same time, it can also realize that the toggle part 60 and the focus hand wheel 16 are always located directly above the lens, which is convenient for users to clearly understand the rotation position of the zoom hand wheel 18 and the operation of the zoom hand wheel 18.

[0038] Further, the dual-field lens adjustment mechanism 2 also includes a lens cover assembly 56 and a calibration ring 54, wherein the lens cover assembly 56 is fixedly connected to the front end of the main lens barrel 10, for example, the lens cover assembly 56 is fixedly connected to the front end of the main lens barrel 10 by a threaded connection, which can play a role in protecting the lens. The calibration ring 54 is fixedly sleeved outside the main lens barrel 10 and cooperates with the circumferential limit of the zoom hand wheel 18 to limit the rotation angle of the zoom hand wheel 18, thereby playing a role in optical parfocality and calibrating the field of view. Specifically, the calibration ring 54 is located between the zoom hand wheel 18 and the focusing hand wheel 16, and the zoom hand wheel 18 is located between the lens cover assembly 56 and the calibration ring 54, and the calibration ring 54 cooperates with the lens cover assembly 56 to axially limit the zoom hand wheel 18 without affecting the rotation of the zoom hand wheel 18. The calibration ring 54 is provided with a calibration mechanism, through which the parfocality of the large and small fields of view switching is achieved, and the large and small fields of view switching no longer require focusing, and the use process is fast and convenient. After the position of the calibration ring 54 is determined, the top screw 63 can be used to lock it, so that the calibration ring 54 is fixed relative to the main lens barrel 10 or the rear shell 20. Figure 7 As shown, the calibration mechanism is, for example, a limit block 62, which is arranged on the side of the calibration ring 54 opposite to the focusing hand wheel 16, that is, directly below in the figure, and the limit block 62 extends from the calibration ring 54 toward the front, and a limit groove 64 is correspondingly provided on the inner wall of the rear end of the magnification hand wheel 18, and the limit block 62 is limited and fitted in the limit groove 64. Since the calibration ring 54 is fixed relative to the main lens barrel 10, the magnification hand wheel 18 can only rotate within a certain angle range, for example, the one-way rotation angle of the magnification hand wheel 18 is 35° or 40°.

[0039] In such Figure 10-12 In the illustrated embodiment, the zoom hand wheel 18 is provided with an internal thread 42, and the second slide arm 34 is provided with an external thread 44, and the internal thread 42 is threadedly connected with the external thread 44. In this embodiment, for example, three first slide arms 26 and three second slide arms 34 are provided, and the second slide arms 34 are located radially outside the first slide arm 26, and the external thread 44 is provided on the outer side wall of the end of the second slide arm 34. The zoom hand wheel 18 includes a fixedly connected hand wheel clamp 66 and a hand wheel inner ring 68, for example, the hand wheel inner ring 68 is fixedly connected to the inner wall of the hand wheel clamp 66 by adhesive, the internal thread 42 is provided on the inner wall of the hand wheel inner ring 68, and the toggle part 60 is provided on the outer wall of the hand wheel clamp 66, so that the toggle part 60 is always located directly above the lens during the entire zoom process, so as to facilitate user operation.

[0040] Preferably, the dual-field lens adjustment mechanism 2 further includes a zoom hand wheel pressing ring 58, which is fixedly connected to the front end of the main lens barrel 10, for example, the zoom hand wheel pressing ring 58 is threadedly connected and fixed to the main lens barrel 10, and the zoom hand wheel pressing ring 58 cooperates with the main lens barrel 10 to realize axial limitation of the zoom hand wheel 18 without affecting the rotation of the zoom hand wheel 18, so that the zoom hand wheel 18 can only perform rotational movement relative to the main lens barrel 10. Through the threaded connection relationship between the internal thread 42 and the external thread 44, when the zoom hand wheel 18 is rotated, the zoom group 14 can be driven to move forward and backward in the axial direction, thereby realizing rapid switching of the large and small fields of view.

[0041] In the illustrated embodiment, please also refer to Figure 3 and Figure 8 As shown, the focusing hand wheel 16 is drivingly connected to the focusing group 12, a second guide post 46 is provided on the outer wall of the first sliding arm 26, an eccentric groove 48 is provided on the inner side of the focusing hand wheel 16, the second guide post 46 can be slidably matched in the eccentric groove 48, the main barrel 10 and the rear shell 20 are respectively provided with axial limiting sliding holes 70 corresponding to the second guide post 46, the second guide post 46 can be slidably penetrated into the two axial limiting sliding holes 70, and the end thereof extends into the eccentric groove 48, so as to realize the driving cooperation between the second guide post 46 and the eccentric groove 48, the axial limiting sliding hole 70 plays a role of avoiding the second guide post 46 on the one hand, and plays a role of limiting the second guide post 46 on the other hand, thereby limiting the focusing group 12 to only be able to move axially forward and backward but not rotate.

[0042] The cam 78 is provided with a plurality of locking members 72 disposed on the rear edge of the cam 76. The cam 78 is provided with a plurality of locking members 72 disposed on the rear edge of the cam 76. The plurality of locking members 72 are provided with plurality of locking members 72 disposed on the rear edge of the cam 76. The plurality of locking members 72 are provided with plurality of locking members 72 disposed on the rear edge of the cam 76. The lower part of the rotating wheel 78 protrudes out of the rotating cover 74 and is located inside the mounting seat 72. The eccentric groove 48 is provided on the lower bottom surface of the rotating wheel 78. The eccentric groove 48 is set to deviate from the center of the rotating wheel 78. The upper end of the second guide post 46 can be slidably matched in the eccentric groove 48, so that when the rotating cover 74 rotates, it drives the rotating wheel 78 to rotate and drives the second guide post 46 and the focusing group 12 to move axially forward and backward through the eccentric matching structure. The limit member 80 is located between the surrounding wall 82 and the inner side wall of the rotating cover 74, and the mounting seat 72 is located between the limit member 80 and the inner side wall of the rotating cover 74, and the limit member 80 is limitedly connected between the rotating cover 74 and the mounting seat 72, for example, by limiting the rotation through a concave and convex limiting structure, so as to limit the rotating cover 74 in the up and down directions, so that the rotating cover 74 can only rotate relative to the mounting seat 72 but cannot move up and down, thereby preventing the rotating cover 74 from detaching from the mounting seat 72.

[0043] In the embodiment shown, Figure 3 As shown, a first axial slide 50 and a second axial slide 52 are provided on the inner wall of the main lens barrel 10. For example, a step 84 is provided on the inner wall of the main lens barrel 10, and the step 84 divides the space inside the main lens barrel 10 into the first axial slide 50 and the second axial slide 52. The focusing group 12 can be slidably set on the first axial slide 50, and the zoom group 14 can be slidably set on the second axial slide 52. At the same time, the focusing group 12 and the zoom group 14 are cross-staggered and arranged with each other. Preferably, the first axial slide 50 and the second axial slide 52 are also provided with an axial limiting structure to axially limit the focusing group 12 and the magnification group 14, so that the focusing group 12 and the magnification group 14 can only slide within a preset sliding stroke; a circumferential limiting structure is also provided between the first axial slide 50 and the focusing group 12 and between the second axial slide 52 and the magnification group 14 to circumferentially limit the focusing group 12 and the magnification group 14 to prevent the focusing group 12 and the magnification group 14 from circumferential rotation.

[0044] Based on the optical design characteristics, this application realizes the cross-type field of view switching and focusing structure layout, which is compact and easy to operate. Whether switching the field of view or focusing, the lens will not rotate and always moves along the optical axis to ensure the consistency of optical performance. Moreover, the cross-distributed field of view switching and focusing form of this application is not only applicable to the combination of cam and eccentric wheel (such as Figure 1-8 The embodiment shown), a multi-start thread and an eccentric wheel combination can also be used (such as Figure 10-12 Embodiment shown).

[0045] In summary, the present application provides a dual-field lens adjustment mechanism having an axial front-to-back direction, comprising a main lens barrel, a focusing group, a magnification group, a focusing handwheel and a magnification handwheel, wherein the focusing group and the magnification group are axially arranged in the main lens barrel and cross and avoid each other, the magnification handwheel is rotatably mounted outside the main lens barrel and axially interlaced with the magnification group for driving the magnification group to move forward and backward in the axial direction, and the focusing handwheel is rotatably mounted outside the main lens barrel and axially interlaced with the focusing group for driving the focusing group to move forward and backward in the axial direction. The present application designs the focusing group and the magnification group to cross each other, so that the axial movement strokes between the two avoid each other and do not interfere with each other, thereby realizing an independent cross-type motion mechanism. At the same time, the magnification handwheel and the magnification group are cross-staggered in the axial direction, and the focusing handwheel and the focusing group are cross-staggered in the axial direction, which meets the optical characteristics and product requirements, and realizes that the focusing and magnification can be manually and independently controlled without interfering with each other, and the large and small fields of view can be quickly switched, thereby avoiding problems such as local out of focus, and improving shooting and product quality.

[0046] The concepts described herein may be implemented in other forms without departing from their spirit and characteristics. The specific embodiments disclosed should be considered illustrative rather than restrictive. Therefore, the scope of this application is determined by the appended claims rather than by the preceding description. Any changes within the literal meaning and equivalent scope of the claims should fall within the scope of these claims.

Claims

1. A dual-field lens adjustment mechanism having a front-to-rear direction in an axial direction, characterized in that: The invention comprises a main lens barrel (10), a focusing group (12), a magnification group (14), a focusing hand wheel (16) and a magnification hand wheel (18); the focusing group (12) and the magnification group (14) are arranged in the main lens barrel (10) along the axial direction and cross each other; the magnification hand wheel (18) is rotatably mounted outside the main lens barrel (10) and intersects with the magnification group (14) in the axial direction, and is used to drive the magnification group (14) to move forward and backward in the axial direction; the focusing hand wheel (16) is rotatably mounted outside the main lens barrel (10) and intersects with the focusing group (12) in the axial direction, and is used to drive the focusing group (12) to move forward and backward in the axial direction.

2. The dual-field lens adjustment mechanism according to claim 1, characterized in that: The zoom hand wheel (18) is correspondingly arranged on the radial outer side of the focusing group (12), and the focusing hand wheel (16) is correspondingly arranged on the radial outer side of the zoom group (14).

3. The dual-field lens adjustment mechanism according to claim 2, characterized in that: The zoom hand wheel (18) is rotatably mounted outside the main lens barrel (10), and the zoom hand wheel (18) and the main lens barrel (10) are coaxially arranged; the focusing hand wheel (16) is rotatably mounted on one side of the main lens barrel (10), and the rotation axis of the focusing hand wheel (16) is perpendicular to the central axis of the main lens barrel (10).

4. The dual-field lens adjustment mechanism according to claim 3, characterized in that: The focusing group (12) comprises a first slide (22), a first lens (24) fixedly mounted on the first slide (22), and a first slide arm (26) connected to the first slide (22) and extending toward the rear side; the zoom group (14) comprises a second slide (28), a second lens (30) fixedly mounted on the front end of the second slide (28), a third lens (32) fixedly mounted on the rear end of the second slide (28), and a second slide arm (34) connected to the second slide (28) and extending toward the front side; the first slide arm (26) and the second slide arm (34) cross and avoid each other.

5. The dual-field lens adjustment mechanism according to claim 4, characterized in that: The zoom hand wheel (18) extends toward the rear side to form a convex plate (36), the convex plate (36) is provided with a driving inclined groove (38), and the second sliding arm (34) is provided with a first guide column (40), and the first guide column (40) can be slidably matched with the driving inclined groove (38).

6. The dual-field lens adjustment mechanism according to claim 5, characterized in that: Two second sliding arms (34) are symmetrically arranged, and each of the two second sliding arms (34) is provided with a first guide column (40). Two driving inclined grooves (38) are arranged, and the two first guide columns (40) can be slidably matched with the corresponding driving inclined grooves (38), and the inclination directions of the two driving inclined grooves (38) are opposite.

7. The dual-field lens adjustment mechanism according to claim 4, characterized in that: The variable power hand wheel (18) is provided with an internal thread (42), the second sliding arm (34) is provided with an external thread (44), and the internal thread (42) is threadably connected to the external thread (44).

8. The dual-field lens adjustment mechanism according to claim 4, characterized in that: The outer wall of the first sliding arm (26) is provided with a second guide column (46), the inner side of the focusing hand wheel (16) is provided with an eccentric groove (48), and the second guide column (46) can be slidably matched with the eccentric groove (48).

9. The dual-field lens adjustment mechanism according to claim 1, wherein: A first axial slideway (50) and a second axial slideway (52) are provided on the inner wall of the main lens barrel (10); the focusing group (12) can be slidably arranged on the first axial slideway (50); and the zoom group (14) can be slidably arranged on the second axial slideway (52); and / or the dual-field lens adjustment mechanism (2) includes a calibration ring (54); the calibration ring (54) is fixedly sleeved on the outside of the main lens barrel (10) and cooperates with the zoom hand wheel (18) in a circumferential limiter to limit the rotation angle of the zoom hand wheel (18).

10. The dual-field lens adjustment mechanism according to claim 1, wherein: The dual-field lens adjustment mechanism (2) further comprises a lens cover assembly (56) or a zoom hand wheel pressure ring (58), wherein the lens cover assembly (56) or the zoom hand wheel pressure ring (58) is fixedly connected to the front end of the main lens barrel (10) and limits the zoom hand wheel (18); and / or, a toggle portion (60) is provided on the outer wall of the zoom hand wheel (18).

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