Automatic focusing mechanical structure for lens

Abstract

The invention discloses an automatic focusing mechanical structure for a lens, which comprises a main frame, an adjusting frame, a telephoto frame, a rotating disc and a linkage mechanism, an air cylinder is mounted on one side of the main frame, and the automatic process that the air cylinder drives a clamping mechanism to open and close and a servo motor drives rotary focusing is adopted, so that the single operation time is shortened, and the production efficiency is improved; moreover, errors caused by human factors are eliminated, the repeated precision of each focusing action and the consistency of results are ensured, the stability of the product quality is remarkably improved, the rotating disc is driven to rotate through the servo motor, the synchronous belt and the like, the clamped lens is subjected to 360-degree stepless rotation, and the design allows the lens to be continuously clamped under the condition that the lens is not assembled and disassembled again. Different angles of the lens are tested, or different installation postures are simulated, so that the flexibility and coverage range of the test are greatly enhanced.

Description

Technical Field

[0001] This invention relates to the field of lens testing and adjustment, and in particular to a mechanical structure for automatic focusing of lenses. Background Technology

[0002] In recent years, with the rapid improvement of industrial automation in my country, industrial vision technology has been increasingly widely used in fields such as detection, identification, and positioning. The market demand for industrial lenses has been increasing, and higher requirements have been put forward for their performance and testing efficiency.

[0003] In the lens production and quality inspection process, focusing, that is, adjusting the lens focal length to obtain a clear image, is a key process.

[0004] The traditional mainstream method relies on the operator to place the lens on a simple clamp and fix it, then observe the imaging effect with the naked eye and manually rotate the lens barrel or adjustment mechanism to complete the focusing.

[0005] This model has significant drawbacks: the focusing effect is highly dependent on the operator's experience and subjective judgment. Different people, and even the same person, have different judgment standards under different conditions, which leads to poor consistency of focusing results, inability to guarantee accuracy, and large fluctuations in product quality.

[0006] Finally, for scenarios requiring multi-angle testing or use with accessories such as teleconverters, traditional fixtures often cannot achieve flexible and stable rotational adjustment, and are prone to obstructing the lens field of view, affecting the comprehensiveness and accuracy of the test.

[0007] Therefore, we propose a mechanical structure for automatic focusing of lenses to solve the above problems. Summary of the Invention

[0008] The purpose of this invention is to provide a mechanical structure for automatic focusing of a lens, so as to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a mechanical structure for automatic focusing of a lens, comprising:

[0010] The main frame has a cylinder mounted on one side;

[0011] The adjusting frame moves relative to the main frame under the drive of the cylinder;

[0012] The distance from the lens frame is mounted on the adjustment bracket;

[0013] A rotating disk is rotatably connected to the main frame, and an adjusting disk is slidably provided on the rotating disk, with a gripper installed on the adjusting disk;

[0014] A linkage mechanism, connected between the lens mount and the rotating disk, is configured to drive the two adjusting disks to move so that the grippers release or hold the lens when the adjusting frame moves the lens mount.

[0015] The rotating disk rotates within the main frame, and the lens held by the grippers on it rotates relative to the teleconverter on the teleconverter mount.

[0016] Preferably, a first fixed frame is installed on the main frame, and the cylinder is installed on the first fixed frame. A first guide rail is provided in the first fixed frame, and a first slider is slidably connected to the outer periphery of the first guide rail. The first slider is fixedly connected to one end of the connector frame, and the other end of the connector frame is connected to the output end of the cylinder. The first guide rail is connected to one end of the adjusting rod, and the other end of the adjusting rod is connected to the adjusting frame.

[0017] Preferably, the adjustment frame has a semi-circular structure with a connecting seat in the middle, the connecting seat being connected to the adjustment rod, and docking seats at both ends of the adjustment frame, and mounting seats connected to the docking seats are provided on the lens frame.

[0018] Preferably, the main frame is provided with a second fixing frame corresponding to the docking seat, the second fixing frame is provided with a second guide rail, and a second slider that is fixedly connected to the docking seat is slidably connected to the second guide rail.

[0019] Preferably, the rotating disk is equipped with two sets of third guide rails, and each set of third guide rails is slidably connected to two sets of third sliders. The third sliders are fixedly connected to the two adjusting disks respectively, and a reset member, which is a tension spring, is provided between the two third sliders.

[0020] Preferably, the linkage mechanism includes:

[0021] The third fixing frame is installed on the main frame;

[0022] The fourth slider is slidably connected to the third fixing frame;

[0023] A pusher seat is installed on the fourth slider and connected to the distance frame. The pusher seat is provided with two sets of guide surfaces.

[0024] Preferably, each end of the adjustment disk is provided with a contact block, and the two sets of guide surfaces of the push seat respectively contact the opposite contact blocks on the two sets of adjustment disks.

[0025] Preferably, there are two push seats, symmetrically arranged on opposite sides of the two adjustment discs, and the guide surface is an inclined surface or an arc surface.

[0026] Preferably, a servo motor is installed on the other side of the main frame, a transmission wheel is installed on the output shaft of the servo motor, at least two synchronous wheels are symmetrically installed on the side of the main frame near the transmission wheel, and a synchronous belt is fitted on the transmission wheel and the synchronous wheel and is connected to the outer peripheral wall of the rotating disk.

[0027] Preferably, the surface of the gripper is covered with an elastic material layer.

[0028] The technical effects and advantages of this invention are as follows:

[0029] The automated process of opening and closing the clamping mechanism driven by a cylinder and rotating the focus driven by a servo motor shortens the time of each operation, improves production efficiency, eliminates errors introduced by human factors, ensures the repeatability and consistency of each focusing action, and significantly improves the stability of product quality.

[0030] Driven by a cylinder, the mechanical linkage between the adjustment frame and the lens mount, and finally controlled by the pusher and the contact block to open and close the grippers, the entire action process is precisely transmitted by the mechanical structure, without slippage or lag, with good clamping rigidity. The lens does not shake during focusing, providing a stable foundation for high-precision focusing.

[0031] The rotating disk is driven by a servo motor and synchronous belt, allowing the clamped lens to rotate 360° steplessly. This design allows for testing of different angles of the lens or simulating different installation postures without reloading or unloading the lens, greatly enhancing the flexibility and coverage of the test.

[0032] The grippers are made of elastic materials such as rubber coating, which can provide sufficient friction to prevent the lens from rotating and effectively avoid scratching the lens surface. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 This is a schematic diagram of the rear structure of the present invention;

[0035] Figure 3 This is a schematic diagram of the cylinder disassembly of the present invention;

[0036] Figure 4 This is a schematic diagram of the cylinder structure of the present invention;

[0037] Figure 5 This is an exploded view of the present invention;

[0038] Figure 6 This is a schematic diagram of the rotating disk connection of the present invention;

[0039] Figure 7 This is a schematic diagram of the adjusting frame structure of the present invention;

[0040] Figure 8 This is a schematic diagram of the distance frame structure of the present invention;

[0041] Figure 9 This is a schematic diagram of the adjusting disc and the pusher seat structure of the present invention.

[0042] In the diagram: 1. Main frame; 2. Cylinder; 21. First fixed frame; 22. Connector frame; 23. First guide rail; 24. First slider; 25. Adjusting rod; 3. Adjusting frame; 31. Connecting seat; 32. Docking seat; 33. Second fixed frame; 34. Second guide rail; 35. Second slider; 4. Lens frame; 41. Mounting seat; 5. Rotating disk; 6. Servo motor; 61. Transmission wheel; 62. Synchronous wheel; 63. Synchronous belt; 7. Adjusting disk; 71. Gripper; 72. Third slider; 73. Third guide rail; 74. Contact block; 8. Third fixed frame; 81. Fourth slider; 82. Push seat. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] This invention provides, for example Figures 1-9 The illustrated automatic focusing mechanism for a lens includes a main frame 1, an adjustment frame 3, a lens mount 4, a rotating disk 5, and a linkage mechanism.

[0045] A cylinder 2 is installed on one side of the main frame 1;

[0046] A first fixing bracket 21 is installed at the lower end of the cylinder 2. The first fixing bracket 21 is installed with the main frame 1 and can be used to install the cylinder 2 on one side of the main frame 1.

[0047] A first fixed frame 21 is installed on the main frame 1, and a cylinder 2 is installed on the first fixed frame 21. A first guide rail 23 is provided in the first fixed frame 21. A first slider 24 is slidably connected to the outer periphery of the first guide rail 23. The first slider 24 is fixedly connected to one end of the connector frame 22. The other end of the connector frame 22 is connected to the output end of the cylinder 2. The first guide rail 23 is connected to one end of the adjusting rod 25. The other end of the adjusting rod 25 is connected to the adjusting frame 3. The adjusting rod 25 is used to connect with the adjusting frame 3.

[0048] The adjusting frame 3 moves relative to the main frame 1 under the drive of the cylinder 2. The adjusting frame 3 has a semi-circular structure, with a connecting seat 31 in the middle, which is connected to the adjusting rod 25.

[0049] Among them, the cylinder 2 drives the first guide rail 23 to move through the connector frame 22 and the first slider 24, and then drives the adjusting frame 3 to move through the adjusting rod 25.

[0050] When cylinder 2 is started, it drives the connector frame 22 to move. At this time, the connector frame 22 drives the first slider 24 to slide along the first guide rail 23. The sliding of the first guide rail 23 causes the adjusting rod 25 to move accordingly. At this time, the adjusting rod 25 pulls the connecting seat 31 connected to it to move, so that the adjusting frame 3 moves accordingly.

[0051] Both ends of the adjustment frame 3 are provided with docking seats 32, and the distance frame 4 is provided with a mounting seat 41. The mounting seat 41 is installed with the docking seat 32.

[0052] Example 1: The teleconverter frame 4 is mounted on the adjustment frame 3. The teleconverter frame 4 is used for mounting the teleconverter.

[0053] The main frame 1 is provided with a second fixed frame 33 corresponding to the docking seat 32. The second fixed frame 33 is provided with a second guide rail 34. The second guide rail 34 is slidably connected with a second slider 35 that is fixedly connected to the docking seat 32.

[0054] When the connecting seat 31 is subjected to tension or reverse thrust, the adjusting frame 3 moves, and the distance frame 4 installed on it moves along with it through the connecting seat 31.

[0055] When the adjusting frame 3 moves, the second slider 35 at the docking seat 32 slides along the second guide rail 34, thereby causing the second slider 35 to move relative to the second fixed frame 33. Since the second fixed frame 33 is installed on the main frame 1, the adjusting frame 3 moves relative to the main frame 1.

[0056] It is particularly important to note that the rotating disk 5 is rotatably connected to the main frame 1, and an adjusting disk 7 is slidably provided on the rotating disk 5. A clamp 71 is installed on the adjusting disk 7.

[0057] The linkage mechanism, connected between the lens mount 4 and the rotating disk 5, is configured to drive the two adjusting disks 7 to move so that the gripper 71 releases or holds the lens when the adjusting frame 3 moves the lens mount 4.

[0058] The rotating disk 5 rotates within the main frame 1, and the lens held by the gripper 71 on it rotates relative to the teleconverter on the teleconverter mount 4.

[0059] When the rotating disk 5 is rotated, the lens held by the gripper 71 on it rotates. The teleconverter 4 is mounted on the main frame 1 through the adjusting frame 3. The position of the main frame 1 is fixed, so the teleconverter on the teleconverter 4 does not rotate. Thus, when the rotating disk 5 is rotated, the lens rotates relative to the teleconverter on the teleconverter 4.

[0060] Furthermore, two sets of third guide rails 73 are installed on the rotating disk 5, and two sets of third sliders 72 are slidably connected to each set of third guide rails 73. The two sets of third sliders 72 are respectively fixedly connected to the corresponding adjusting disk 7, and the adjusting disk 7 slides along the third guide rail 73 through the third sliders 72.

[0061] Specifically disclosed, a reset element, which is a tension spring, is provided between the two third sliders 72.

[0062] Furthermore, by pulling the two adjusting discs 7 towards each other by the tension spring, the two grippers 71 move towards each other, and the tension spring provides clamping force to clamp the lens.

[0063] Furthermore, one end of the tension spring is fixed to the third slider 72, and the other end can be fixed to the rotating disk 5, or designed to be fixed to the third guide rail 73. One end of the tension spring is limited, thereby limiting the tension force on the adjusting disk 7 when it slides in a fixed position on the third slider 72.

[0064] Specifically disclosed, an adjustment block can be installed at the fixed position of the tension spring and the rotating disk 5 or the third guide rail 73. The adjustment block is connected to the tension spring, and the position of the adjustment block on the rotating disk 5 or the third guide rail 73 can be adjusted, thereby adjusting the position of the tension spring and adjusting the tension on the adjustment disk 7.

[0065] Example 2: The linkage mechanism includes a third fixed frame 8, a fourth slider 81, and a pusher seat 82.

[0066] The third fixed frame 8 is installed on the main frame 1, the fourth slider 81 is slidably connected to the third fixed frame 8, and the push seat 82 is installed on the fourth slider 81 and connected to the distance frame 4. The push seat 82 is provided with two sets of guide surfaces.

[0067] Both ends of the adjustment plate 7 are provided with contact blocks 74, and the two sets of guide surfaces of the push seat 82 respectively contact the corresponding contact blocks 74 on the two sets of adjustment plates 7;

[0068] When the distance frame 4 moves, it drives the push seat 82 to move, and through the cooperation of the guide surface and the contact block 74, it drives the adjustment disk 7 and the gripper 71 to move.

[0069] It is particularly important to note that the push seat 82 is located between the two sets of adjusting discs 7, and the push seat 82 is in contact with the contact blocks 74 on the two sets of adjusting discs 7. The contact point between the push seat 82 and the contact blocks 74 is provided with an arc surface or a slope. The push seat 82 moves, causing the push seat 82 to push the two sets of adjusting discs 7 to move accordingly, so that the grippers 71 installed on the adjusting discs 7 move in opposite directions.

[0070] Two push seats 82 are provided, symmetrically arranged on opposite sides of the two adjustment discs 7. The guide surface is an inclined surface or an arc surface. By setting two sets, the push force of the push seats 82 on the adjustment discs 7 is symmetrical, ensuring that the adjustment discs 7 are subjected to uniform force and avoiding jamming caused by unilateral force.

[0071] Furthermore, when the adjusting frame 3 moves the telescope frame 4 toward the main frame 1, the push seat 82, which is installed with the telescope frame 4, moves accordingly. At this time, the push seat 82 slides along the fourth slider 81, so that the push seat 82 moves longitudinally relative to the main frame 1.

[0072] Since the adjusting disk 7 slides laterally on the third guide rail 73 via the third slider 72, its longitudinal position relative to the rotating disk 5 and the main frame 1 does not change. When the push seat 82 moves longitudinally, the guide surface of the push seat 82 can be set as a bevel or an arc edge. By pressing the guide surface against the end contact block 74 of the adjusting disk 7, the push contact block 74 moves laterally.

[0073] This causes the adjustment disk 7 to move the third slider 72 laterally along the third guide rail 73. At this time, the distance between the two adjustment disks 7 increases, which in turn increases the distance between the clamps 71 installed on the adjustment disk 7, making it easier to place the lens between the two clamps 71.

[0074] It is particularly important to note that the surface of the gripper 71 is covered with an elastic material layer, and the gripper 71 is coated with rubber to prevent scratches.

[0075] Furthermore, when the distance between the two adjusting discs 7 increases, the distance between the relative third sliders 72 also increases, and the tension spring between the two third sliders 72 is further stretched.

[0076] When the lens is placed, the cylinder 2 is activated to reverse drive, causing the connector bracket 22 and the first slider 24 to move. At this time, the adjustment rod 25 moves and drives the adjustment bracket 3 to move in the reverse direction through the connecting seat 31, thereby causing the lens mount 4 installed on the adjustment bracket 3 to move in the reverse direction as well.

[0077] Furthermore, the movement of the lens mount 4 will cause the pusher 82 to move in the opposite direction away from the contact block 74. At this time, under the action of the tension spring, the two adjustment discs 7 are pulled to move towards each other, which in turn causes the two grippers 71 to move towards each other to clamp the lens.

[0078] As the distance from the frame 4 moves, the push seat 82 separates from the contact block 74, and the push seat 82 does not obstruct the contact block 74 from rotating with the adjustment disk 7 and the rotating disk 5.

[0079] Specifically disclosed, a servo motor 6 is installed on the other side of the main frame 1, and a transmission wheel 61 is installed on the output shaft of the servo motor 6. Two synchronous wheels 62 are symmetrically installed on the side of the main frame 1 near the transmission wheel 61.

[0080] The outer peripheral wall of the rotating disk 5 is interference-fitted with a synchronous belt 63. When the synchronous belt 63 is installed, it is pulled upward and sleeved on the inner wall of the transmission wheel 61 to achieve an interference fit with the transmission wheel 61. When the synchronous belt 63 is installed on the transmission wheel 61, the synchronous belt 63 is also in contact with both sides of the synchronous wheel 62.

[0081] Furthermore, by starting the servo motor 6, the transmission wheel 61 is driven to drive the synchronous belt 63, which in turn drives the rotating disk 5 to rotate in the main frame 1. This allows the lens to be smoothly clamped and rotated at any angle without obstructing the lens's field of view. At this time, the teleconverter frame 4 is mounted on the adjustment frame 3, and it does not rotate relative to the main frame 1 through the adjustment frame 3. When the rotating disk 5 drives the clamped lens to rotate, the lens rotates relative to the teleconverter on the teleconverter frame 4.

[0082] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mechanical structure for automatic focusing of a lens, characterized in that, include: Main frame (1), with a cylinder (2) installed on one side; The adjusting frame (3) moves relative to the main frame (1) under the drive of the cylinder (2); The distance from the frame (4) is installed on the adjustment frame (3); A rotating disk (5) is rotatably connected to the main frame (1). An adjusting disk (7) is slidably provided on the rotating disk (5), and a gripper (71) is installed on the adjusting disk (7). The linkage mechanism, connected between the lens mount (4) and the rotating disk (5), is configured to drive the two adjusting disks (7) to move so that the gripper (71) releases or holds the lens when the adjusting frame (3) moves the lens mount (4); The rotating disk (5) rotates in the main frame (1), and the lens held by the jaws (71) on it rotates relative to the teleconverter on the lens mount (4).

2. The automatic focusing mechanical structure for a lens according to claim 1, characterized in that, The main frame (1) is equipped with a first fixed frame (21), and the cylinder (2) is mounted on the first fixed frame (21). The first fixed frame (21) is provided with a first guide rail (23). The outer periphery of the first guide rail (23) is slidably connected to a first slider (24). The first slider (24) is fixedly connected to one end of the connector frame (22). The other end of the connector frame (22) is connected to the output end of the cylinder (2). The first guide rail (23) is connected to one end of the adjusting rod (25). The other end of the adjusting rod (25) is connected to the adjusting frame (3).

3. The automatic focusing mechanical structure for a lens according to claim 1, characterized in that, The adjustment frame (3) has a semi-circular structure with a connecting seat (31) in the middle. The connecting seat (31) is connected to the adjustment rod (25). Both ends of the adjustment frame (3) are provided with docking seats (32). The distance frame (4) is provided with a mounting seat (41) connected to the docking seat (32).

4. The automatic focusing mechanical structure for a lens according to claim 3, characterized in that, The main frame (1) is provided with a second fixed frame (33) corresponding to the docking seat (32), the second fixed frame (33) is provided with a second guide rail (34), and the second guide rail (34) is slidably connected with a second slider (35) which is fixedly connected to the docking seat (32).

5. The automatic focusing mechanical structure for a lens according to claim 1, characterized in that, Two sets of third guide rails (73) are installed on the rotating disk (5), and two sets of third sliders (72) are slidably connected on each set of third guide rails (73). The third sliders (72) are fixedly connected to the two adjusting disks (7) respectively. A reset member is provided between the two third sliders (72), and the reset member is a tension spring.

6. The automatic focusing mechanical structure for a lens according to claim 1, characterized in that, The linkage mechanism includes: The third fixing frame (8) is installed on the main frame (1); The fourth slider (81) is slidably connected to the third fixing frame (8); The push seat (82) is installed on the fourth slider (81) and connected to the distance frame (4). The push seat (82) is provided with two sets of guide surfaces.

7. The automatic focusing mechanical structure for a lens according to claim 6, characterized in that, Both ends of the adjustment disk (7) are provided with contact blocks (74), and the two sets of guide surfaces of the push seat (82) respectively contact the corresponding contact blocks (74) on the two sets of adjustment disks (7).

8. The automatic focusing mechanical structure for a lens according to claim 6, characterized in that, Two push seats (82) are provided, symmetrically arranged on opposite sides of the two adjustment discs (7), and the guide surface is an inclined surface or an arc surface.

9. The automatic focusing mechanical structure for a lens according to claim 1, characterized in that, A servo motor (6) is installed on the other side of the main frame (1). A transmission wheel (61) is installed on the output shaft of the servo motor (6). At least two synchronous wheels (62) are symmetrically installed on the side of the main frame (1) near the transmission wheel (61). A synchronous belt (63) is fitted on the transmission wheel (61) and the synchronous wheel (62) and is connected to the outer peripheral wall of the rotating disk (5) for transmission.

10. A mechanical structure for automatic focusing of a lens according to claim 1, characterized in that, The surface of the gripper (71) is covered with an elastic material layer.

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