A focusing lens

Abstract

The utility model relates to optical lens technical field, specifically is a focusing lens, including taper cylinder and fixedly connected on the main mirror of taper cylinder, one side of taper cylinder is equipped with the installation cylinder, the inside of installation cylinder is equipped with the adjusting lens barrel, and installation structure is equipped on taper cylinder and installation cylinder, and installation structure includes locating assembly and engagement assembly, two insertion blocks are fixedly connected on taper cylinder, two insertion holes are equipped on installation cylinder, and insertion block is inserted with insertion hole, fixedly connected with fixed link on installation cylinder, and the sliding connection with sliding plate is established on fixed link, and the fixed link with fixedly connected with the clamping block on sliding plate, and the clamping groove is equipped on insertion block, and the clamping block is engaged with the clamping groove, and the fixed link with installation cylinder between fixedly connected with spring, and the accurate centering is realized through locating assembly, and the coaxiality of optical axis is guaranteed, and the quick plugging and automatic locking of exempting from tools are realized through the cooperation of engagement assembly, and the convenient dismounting and reliable connection are achieved, and the whole structure is simple and practical, improves the assembly efficiency, and strengthens the stability and maintainability of lens connection.

Description

Technical Field

[0001] This utility model relates to a lens, specifically a focusing lens, and belongs to the field of optical lens technology. Background Technology

[0002] Focusing lenses are core components of optical imaging systems and are widely used in cameras, video cameras, microscopes, telescopes, and various industrial vision inspection equipment. Their basic function is to adjust the focal length of the entire optical system by changing the relative positions of the lens groups inside the lens, so that objects at different distances can be clearly imaged on the image sensor or photographic film.

[0003] However, existing focusing lenses typically use threaded connections, screw fixation, or glue bonding to secure the lens barrel to the mounting tube. While traditional threaded connections are simple to manufacture, they are prone to issues like overly tight or loose threads during mass production, affecting assembly efficiency and connection reliability. Screw fastening requires tools like screwdrivers, making assembly cumbersome, and screws are prone to loosening over time, causing the lens optical axis to shift and affecting image quality. Glue bonding, on the other hand, presents drawbacks such as difficulty in disassembly, hindering later maintenance and parts replacement. Utility Model Content

[0004] The purpose of this invention is to provide a focusing lens to solve the above problems. It achieves precise centering through a positioning component to ensure optical axis coaxiality. With the help of a locking component, it enables tool-free quick insertion and removal and automatic locking. It is easy to assemble and disassemble and the connection is reliable. The overall structure is simple and practical, which not only improves assembly efficiency, but also enhances the stability and maintainability of the lens connection.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a focusing lens, comprising a cone and a main lens fixedly connected to the cone, a mounting cylinder provided on one side of the cone, an adjusting lens cylinder provided inside the mounting cylinder, and a mounting structure provided on the cone and the mounting cylinder, the mounting structure comprising a positioning component and a locking component, wherein the positioning component realizes the mounting and positioning of the cone and the mounting cylinder, and the locking component realizes the locking and fixing of the cone and the mounting cylinder;

[0006] The engaging assembly includes an insert block, an insertion hole, a fixing rod, a sliding plate, a locking block, a locking groove, and a spring. Two insert blocks are fixedly connected to the conical cylinder, and two insertion holes are provided on the mounting cylinder. The insert blocks are inserted into the insertion holes. A fixing rod is fixedly connected to the mounting cylinder, and a sliding plate is slidably connected to the fixing rod. A locking block is fixedly connected to the sliding plate, and a locking groove is provided on the insert block. The locking block engages with the locking groove, and a spring is fixedly connected between the sliding plate and the mounting cylinder.

[0007] Preferably, the engaging assembly further includes a chamfer, the end of the insert block is chamfered, the cross-section of the end of the insert block is trapezoidal, and the cross-section of the fixing rod is T-shaped.

[0008] Preferably, the engaging assembly further includes a guide shaft and a pressing block. Two guide shafts are fixedly connected to the bottom end of the slide plate. The guide shafts are slidably connected to the mounting cylinder. The pressing block is fixedly connected to the slide plate.

[0009] Preferably, the positioning component includes positioning posts and positioning sleeves, four positioning posts are fixedly connected to the cone cylinder, and four positioning sleeves are fixedly connected to the mounting cylinder, with the positioning posts and positioning sleeves being inserted into each other.

[0010] Preferably, the outer surface of the cone is provided with multiple reinforcing ribs, which are arranged alternately in the circumferential and axial directions.

[0011] Preferably, the mounting cylinder and the adjusting lens cylinder are provided with a focusing structure, the focusing structure including a fixing ring, a fixing block and a sliding groove, the adjusting lens cylinder is fixedly connected to the fixing ring, the fixing ring is fixedly connected to the fixing block, the mounting cylinder is provided with a sliding groove, and the fixing block is slidably connected to the sliding groove.

[0012] Preferably, the focusing structure further includes a screw and a driving component. The screw is rotatably connected to the mounting cylinder, and the screw is threadedly connected to the fixing block. The driving component is fixedly connected to the mounting cylinder, and the output end of the driving component is fixedly connected to the screw.

[0013] Preferably, the focusing structure further includes a guide rod, and the guide rod is fixedly connected inside the mounting cylinder, and the fixing block is slidably connected to the guide rod.

[0014] Preferably, the focusing structure further includes a protective cylinder, a protective cover, and screws. The protective cylinder is fixedly connected to the mounting cylinder, the protective cylinder covers the outside of the driving component, and the protective cover is fixedly connected to the protective cylinder by screws.

[0015] The beneficial effects of this utility model are as follows: A mounting cylinder is provided on one side of the cone cylinder, and an adjusting lens cylinder is provided inside the mounting cylinder. The cone cylinder and the mounting cylinder are equipped with a mounting structure, which includes a positioning component and a locking component. Two insert blocks are fixedly connected to the cone cylinder, and two insertion holes are provided on the mounting cylinder. The insert blocks are inserted into the insertion holes. A fixing rod is fixedly connected to the mounting cylinder, and a sliding plate is slidably connected to the fixing rod. A locking block is fixedly connected to the sliding plate, and a locking groove is provided on the insert block. The locking block engages with the locking groove. A spring is fixedly connected between the sliding plate and the mounting cylinder. Precise alignment is achieved through the positioning component, ensuring the coaxiality of the optical axis. With the assistance of the locking component, tool-free quick insertion and removal and automatic locking are achieved. Disassembly and assembly are convenient and the connection is reliable. The overall structure is simple and practical, improving assembly efficiency and enhancing the stability and maintainability of the lens connection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the connection structure between the mounting cylinder and the focusing structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the connection structure between the cone and the mounting structure of this utility model;

[0019] Figure 4 for Figure 3 The diagram shown is an enlarged view of the structure of part A.

[0020] Figure 5 This is a schematic diagram of the connection structure between the screw and the fixing block of this utility model.

[0021] In the diagram: 1. Conical cylinder; 2. Mounting cylinder; 3. Focusing structure; 301. Fixing ring; 302. Fixing block; 303. Slide groove; 304. Screw; 305. Guide rod; 306. Driving component; 307. Protective cylinder; 308. Protective cover; 309. Screw; 4. Mounting structure; 401. Positioning post; 402. Positioning sleeve; 403. Insertion block; 404. Insertion hole; 405. Fixing rod; 406. Slide plate; 407. Locking block; 408. Locking groove; 409. Spring; 410. Guide shaft; 411. Pressing block; 412. Chamfer; 5. Primary lens; 6. Reinforcing rib; 7. Adjusting lens barrel. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-5 As shown, a focusing lens includes a cone 1 and a primary lens 5 fixedly connected to the cone 1. A mounting tube 2 is provided on one side of the cone 1, and an adjusting lens tube 7 is provided inside the mounting tube 2. A mounting structure 4 is provided on the cone 1 and the mounting tube 2. The mounting structure 4 includes a positioning component and a locking component. The positioning component realizes the mounting and positioning of the cone 1 and the mounting tube 2, and the locking component realizes the locking and fixing of the cone 1 and the mounting tube 2.

[0024] The engaging assembly includes an insert block 403, an insertion hole 404, a fixing rod 405, a sliding plate 406, a locking block 407, a locking groove 408, and a spring 409. Two insert blocks 403 are fixedly connected to the cone cylinder 1, and two insertion holes 404 are provided on the mounting cylinder 2. The insert blocks 403 are inserted into the insertion holes 404. A fixing rod 405 is fixedly connected to the mounting cylinder 2, and a sliding plate 406 is slidably connected to the fixing rod 405. A locking block 407 is fixedly connected to the sliding plate 406. A locking groove 408 is provided on the insert block 403, and the locking block 407 engages with the locking groove 408. A spring 409 is fixedly connected between the sliding plate 406 and the mounting cylinder 2.

[0025] As a technical optimization of this utility model, the engaging assembly also includes a chamfer 412, a guide shaft 410, and a pressing block 411. The end of the insert block 403 is integrally formed with a chamfer 412. The end section of the locking block 407 is designed as a trapezoidal inclined surface structure. The fixing rod 405 adopts a T-shaped cross-section. During assembly, when the insert block 403 is pushed in along the insertion hole 404, the chamfer 412 facilitates the insertion of the insert block 403 into the insertion hole 404. The insert block 403 will press against the trapezoidal inclined surface of the locking block 407, which can automatically push the slide plate 406 downward, without the need for manual manipulation of the slide plate 406. The T-shaped fixing rod 405 can vertically limit the slide plate 406, preventing... The slide plate 406 is designed to prevent vertical displacement and the locking block 407 from misaligning, ensuring smooth and stable engagement. Two guide shafts 410 are vertically fixed at the bottom of the slide plate 406. The guide shafts 410 slide in conjunction with the pre-drilled holes on the outer wall of the mounting cylinder 2. An integrally formed pressing block 411 is formed on the outer side of the slide plate 406. The two guide shafts 410 and the fixing rod 405 form a double-axis limiting structure, which restricts the slide plate 406 to slide only vertically, preventing the slide plate 406 from tilting due to force on one side. The pressing block 411 protrudes outward from the outer side of the cylinder wall, allowing the operator to press the pressing block 411 directly with one hand to slide the slide plate 406, quickly releasing the locking engagement between the locking block 407 and the slot 408 without the need for any disassembly tools.

[0026] As a technical optimization of this utility model, the positioning component includes positioning posts 401 and positioning sleeves 402; four positioning posts 401 are evenly fixed on the mating end face of the cone cylinder 1, and four positioning sleeves 402 are fixed on the corresponding end face of the mounting cylinder 2. The positioning posts 401 and the positioning sleeves 402 are precisely fitted together with a gap; the four positioning posts 401 are symmetrically distributed at the four corners of a rectangle, and radial and circumferential positioning can be completed simultaneously during assembly to achieve four-point coaxial centering, eliminate the optical axis offset gap after the cone cylinder 1 and the mounting cylinder 2 are assembled, greatly improve the concentricity of the lens imaging, and avoid edge distortion and blurring of the image.

[0027] As a technical optimization of this utility model, the outer wall of the cone 1 is integrally formed with multiple reinforcing ribs 6. All reinforcing ribs 6 are divided into two types: circumferential ribs and axial straight ribs. The two types of ribs intersect to form a grid reinforcement layer. The grid structure can significantly improve the structural rigidity of the cone 1 wall. Under the conditions of high-frequency vibration of industrial equipment and lens hoisting, it can effectively suppress the deformation of the wall, avoid the internal primary lens 5 from being displaced by force, and improve the overall shock resistance and service life of the lens.

[0028] As a technical optimization of this utility model, a focusing structure 3 is provided on the mounting cylinder 2 and the adjusting lens cylinder 7. The focusing structure 3 includes a fixing ring 301, a fixing block 302, and a sliding groove 303. The fixing ring 301 is fixedly connected to the adjusting lens cylinder 7, and the fixing ring 301 is tightly fitted to the outer side of the adjusting lens cylinder 7. The fixing block 302 is fixedly connected to the outer wall of the fixing ring 301. The mounting cylinder 2 has an elongated sliding groove 303 along the axial direction. The fixing block 302 passes through the sliding groove 303 and slides linearly along the sliding groove 303. The sliding groove 303 forms a basic guide for the fixing block 302, restricting the adjusting lens cylinder 7 to move only back and forth along the axis, thus initially avoiding the problem of lens cylinder rotation and tilting during focusing.

[0029] As a technical optimization of this utility model, the focusing structure 3 further includes a screw 304, a driving component 306, and a guide rod 305. The screw 304 is rotatably supported at both ends of the mounting cylinder 2, and the body of the screw 304 is threadedly engaged with the threaded hole in the fixing block 302. The driving component 306 is fixedly installed on the outside of the mounting cylinder 2. The driving component 306 is a micro geared motor, and the motor output shaft is rigidly fixed coaxially with the end of the screw 304. After the equipment is powered on, the driving component 306 receives external control signals to achieve forward and reverse rotation, driving the screw 304 to rotate synchronously, and driving the fixing block 302 through threaded transmission. The axial displacement of the lens barrel 7 is adjusted, and the transmission stroke of the screw 304 is linearly controllable, which can accurately lock any focal length position to meet the high-precision focusing requirements of machine vision. The guide rod 305 is fixed in parallel inside the inner cavity of the mounting cylinder 2. The guide rod 305 passes through the inside of the fixing block 302 and slides with the fixing block 302. The guide rod 305 and the slide groove 303 form an inner and outer double guide limit structure, which double-constrains the movement trajectory of the fixing block 302, further reducing the shaking and deflection of the lens barrel 7 during focusing, reducing the wear of the fixing block 302 on one side, and improving the repeated focusing accuracy of the lens during long-term use.

[0030] As a technical optimization of this utility model, the focusing structure 3 also includes a protective cylinder 307, a protective cover 308, and screws 309. The protective cylinder 307 is fixedly welded to the outer wall of the mounting cylinder 2. The protective cylinder 307 completely encloses the driving component 306. The outer inspection port of the protective cylinder 307 is locked with the protective cover 308 by multiple screws 309. The protective cylinder 307 can isolate workshop dust, water vapor, and cutting fluid, and prevent the motor of the driving component 306 and the threads of the screw 304 from rusting and jamming. During inspection and maintenance, only the screws 309 need to be unscrewed and the protective cover 308 removed to directly clean the impurities of the screw 304 and inspect the motor circuit, without disassembling the lens optical body, thus reducing the difficulty of maintenance.

[0031] When using this utility model, first hold the cone cylinder 1 and push the four positioning pins 401 horizontally into the positioning sleeve 402 of the mounting cylinder 2 to complete the four-point centering; the synchronous insertion block 403 enters the insertion hole 404, the insertion block 403 squeezes the trapezoidal locking block 407 to push the slide plate 406 down, the spring 409 is compressed, after the insertion block 403 is fully in place, the spring 409 rebounds and pulls the slide plate 406 to reset, and the locking block 407 is locked into the slot 408 to complete the automatic locking;

[0032] When focusing, the power supply of the drive unit 306 is turned on, and the host computer sends a focusing command to control the motor to rotate forward and reverse. The screw 304 rotates and drives the fixed block 302 to slide smoothly along the slide groove 303 and the guide rod 305. The adjusting lens barrel 7 moves back and forth synchronously, changing the distance between the main lens 5 and the rear lens group inside the adjusting lens barrel 7, thus completing the focus adjustment.

[0033] During disassembly and maintenance, after the lens is powered off, press the pressing blocks 411 on both sides with both hands. The sliding plate 406 will slide downwards against the elastic force of the spring 409, and the locking block 407 will disengage from the locking slot 408 and be released. The two parts can be separated by pulling the cone 1 outwards, which is convenient for cleaning the main lens 5 and inspecting the internal adjustment tube 7. When maintaining the drive component 306, unscrew the screw 309, remove the protective cover 308, clean the dust from the screw 304, inspect the motor circuit, and then put the protective cover 308 back on and tighten the screw 309.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A focusing lens, comprising a cone (1) and a primary lens (5) fixedly connected to the cone (1), characterized in that: The cone (1) has a mounting cylinder (2) on one side, and the mounting cylinder (2) has an adjusting mirror cylinder (7) inside. The cone (1) and the mounting cylinder (2) are provided with a mounting structure (4). The mounting structure (4) includes a positioning component and a locking component. The positioning component is used to position the cone (1) and the mounting cylinder (2), and the locking component is used to lock and fix the cone (1) and the mounting cylinder (2). The engaging assembly includes a plug (403), a socket (404), a fixing rod (405), a sliding plate (406), a locking block (407), a locking groove (408), and a spring (409). Two plugs (403) are fixedly connected to the cone (1), and two sockets (404) are provided on the mounting cylinder (2). The plugs (403) are inserted into the sockets (404). A fixing rod (405) is fixedly connected to the mounting cylinder (2). A sliding plate (406) is slidably connected to the fixing rod (405). A locking block (407) is fixedly connected to the sliding plate (406). A locking groove (408) is provided on the plug (403). The locking block (407) engages with the locking groove (408). A spring (409) is fixedly connected between the sliding plate (406) and the mounting cylinder (2).

2. A focusing lens according to claim 1, characterized in that: The locking assembly also includes a chamfer (412), the end of the insert (403) is provided with a chamfer (412), the end of the locking block (407) has a trapezoidal structure, and the cross-section of the fixing rod (405) has a T-shaped structure.

3. A focusing lens according to claim 1, characterized in that: The engaging assembly also includes a guide shaft (410) and a pressing block (411). The bottom end of the slide plate (406) is fixedly connected to two guide shafts (410). The guide shafts (410) are slidably connected to the mounting cylinder (2). The pressing block (411) is fixedly connected to the slide plate (406).

4. A focusing lens according to claim 1, characterized in that: The positioning component includes positioning posts (401) and positioning sleeves (402). Four positioning posts (401) are fixedly connected to the cone (1), and four positioning sleeves (402) are fixedly connected to the mounting cylinder (2). The positioning posts (401) and positioning sleeves (402) are inserted into each other.

5. A focusing lens according to claim 1, characterized in that: The cone (1) is provided with multiple reinforcing ribs (6) on its outside, and the multiple reinforcing ribs (6) are arranged alternately in the circumferential and axial directions.

6. A focusing lens according to claim 1, characterized in that: The mounting cylinder (2) and the adjusting lens cylinder (7) are provided with a focusing structure (3). The focusing structure (3) includes a fixing ring (301), a fixing block (302) and a sliding groove (303). The adjusting lens cylinder (7) is fixedly connected to the fixing ring (301), and the fixing block (302) is fixedly connected to the fixing ring (301). The mounting cylinder (2) is provided with a sliding groove (303), and the fixing block (302) and the sliding groove (303) are slidably connected.

7. A focusing lens according to claim 6, characterized in that: The focusing structure (3) also includes a screw (304) and a drive (306). The screw (304) is rotatably connected to the mounting cylinder (2). The screw (304) is threadedly connected to the fixing block (302). The drive (306) is fixedly connected to the mounting cylinder (2). The output end of the drive (306) is fixedly connected to the screw (304).

8. A focusing lens according to claim 6, characterized in that: The focusing structure (3) also includes a guide rod (305), and the guide rod (305) is fixedly connected inside the mounting cylinder (2). The fixing block (302) is slidably connected to the guide rod (305).

9. A focusing lens according to claim 7, characterized in that: The focusing structure (3) also includes a protective cylinder (307), a protective cover (308) and a screw (309). The protective cylinder (307) is fixedly connected to the mounting cylinder (2). The protective cylinder (307) covers the outside of the driving component (306). The protective cover (308) is fixedly connected to the protective cylinder (307) by the screw (309).

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