Focusing mechanism for multi-detection-position optical biological measuring instrument

Abstract

The invention relates to the field of optical measurement, in particular to a focusing mechanism for a multi-detection-position optical biological measuring instrument, which comprises two detection frames, the two detection frames are arranged on one side of the measuring instrument, a bottom plate is arranged below the measuring instrument, the measuring instrument is in sliding connection with the bottom plate, the two detection frames are arranged side by side, and the two detection frames are arranged in parallel. The detection frames are in sliding connection with the bottom plate through spring telescopic rods, and the detection frames are rotationally provided with placing plates. The position of the distance measuring plate is adjusted through the adjusting assembly so that the distance measuring plate can be located right in front of the eyes of a person to be detected, after adjustment is completed, the distance measuring piece measures the distance between the eye pupil and the distance measuring plate, the distance and relative position information are sent to the measuring instrument, and the measuring instrument moves to a designated position and drives the focusing mechanism to conduct accurate focusing detection. And meanwhile, the to-be-detected personnel on the other side prepare, so that the accuracy of the focusing mechanism of the equipment is ensured while the working efficiency of the detection equipment is ensured, and the accuracy of a detection result is ensured.

Description

Technical Field

[0001] The invention relates to the field of optical measurement, in particular to a focusing mechanism for a multi-detection position optical biometer. Background Art

[0002] Optical biometer is an instrument used in biological and medical research, and ophthalmic optical biometer is one of them. Ophthalmic optical biometer is an important medical device specially used in ophthalmic diagnosis and treatment, which can accurately measure various biological parameters of the eye. Such equipment plays a key role in the evaluation before ophthalmic surgery, the diagnosis of ocular diseases, and the process of vision correction.

[0003] Most ophthalmic optical biometers are equipped with a manual focus system, which can adjust the focus according to the target distance and optical characteristics to ensure a clear image. For some common usage scenarios, ordinary equipment can do the job. However, for some specific usage scenarios, such as large-scale ophthalmic examinations of social groups such as schools, doctors need to complete a large number of personnel examinations within a specific time, and need to take into account both the accuracy and efficiency of the test results. Among them, the patent application with patent publication number CN116548906B provides a self-positioning ophthalmic optical biometer, which fixes the eye features to a specified position for focus detection by fixing the face. Although the detection accuracy is high, the detection efficiency is low; and the patent application with patent publication number CN215348886U provides a self-calibrating ophthalmic optical biometer, which achieves rapid tracking and focusing of the eyeball by embedding the calibration tool into the measuring instrument, but the position of the face and some other reasons will cause its detection accuracy to decrease, resulting in the device being unable to take into account the accuracy of device recognition while ensuring the inspection efficiency, affecting the detection results.

[0004] Therefore, a focusing mechanism for a multi-detection position optical biometer is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a focusing mechanism for a multi-detection position optical biometer to solve the problem that when conducting large-scale ophthalmic examinations for social groups such as schools, doctors need to complete a large number of personnel examinations within a specific time, resulting in the equipment being unable to take into account the accuracy of equipment recognition while ensuring the inspection efficiency, thereby affecting the detection results.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A focusing mechanism for a multi-detection position optical biometer comprises a detection frame, wherein the detection frame is two in number and both are installed on one side of the measuring instrument, a bottom plate is provided below the measuring instrument, the measuring instrument is slidably connected to the bottom plate, the detection frames are slidably connected to the bottom plate via spring telescopic rods, a placement plate is rotatably installed on the detection frame, and a driving assembly is installed on the bottom plate.

[0008] Among them, the measuring instrument is moved by a motor or manually driven to move it to one side to align with the human eye for precise focus detection. Of course, when using it, people are required to place their heads on the detection frame. When the measuring instrument moves to the left, it will trigger the driving component on the left to flip the placement plate on the right downward to confirm the eye position of the person waiting to be inspected on one side. Of course, once the measuring instrument leaves the left side and moves to the right side, the downward-flipped placement plate on the right will return to its original position, which is convenient for the measuring instrument to inspect.

[0009] The driving assembly includes a piston cylinder, a roller, a hydraulic pump, and an articulated seat. Two piston cylinders are installed on the base plate. A roller is installed on the movable end of the piston cylinder through an articulated seat. A compression spring abutting the articulated seat is installed on the piston cylinder. A torsion spring is installed on the articulated seat. A hydraulic pump is installed on the detection frame. The rotating shaft of the hydraulic pump is fixedly installed on the rotating rod of the placement plate. An inclined portion is provided on the bottom of the measuring instrument. The piston cylinder and the hydraulic pump are connected by a pipeline, and the piston cylinder on the left is connected to the hydraulic pump on the right.

[0010] Specifically, when the measuring instrument moves to the left to check the personnel on the left, when the moving measuring instrument presses against the roller, because the movable end of the piston cylinder is connected to the roller through a hinge seat, the roller will be subjected to the thrust applied by the measuring instrument on one side, and will tilt to one side due to the thrust. However, a torsion spring is installed on the hinge seat, which causes the roller to convert the force received into thrust through the spring when it is subjected to the thrust, so that the movable end of the piston cylinder is subjected to a downward thrust, causing the liquid in the piston cylinder to enter the hydraulic pump through the pipeline, so that the hydraulic pump drives the rotating rod of the placement plate to rotate, and reduces the extrusion pressure at the connection between the roller and the movable end of the piston cylinder through the roller of the movable structure, thereby improving the service life of the drive assembly. Of course, because the movable end of the piston cylinder moves downward, it will push the compression spring through the hinge seat for extrusion. When the measuring instrument moves away from the left side to the other side, the squeezed compression spring will return to its original position and drive the hydraulic pump to operate through the connecting pipe, so that the hydraulic pump drives the placement plate to rotate back to its original position.

[0011] The driving member is connected to a placement plate, one side of the placement plate is provided with two distance measuring plates, and an adjustment component is installed between the distance measuring plate and the placement plate.

[0012] The adjustment assembly includes a bidirectional damping rod and a unidirectional damping rod. The bidirectional damping rod is fixedly installed on the placement plate. One-way damping rods are provided on both sides of the bidirectional damping rod. The movable end of the bidirectional damping rod is fixedly installed on the fixed end of the one-way damping rod. The movable end of the one-way damping rod is fixedly installed on the ranging plate, and the resistance of the one-way damping rod when it moves is greater than the resistance of the bidirectional damping rod when it moves. A locking piece is installed on the placement plate, and the locking piece abuts against the one-way damping rod and the bidirectional damping rod.

[0013] When in use, if a telescopic rod with smooth contraction is used to adjust the position, the ranging board will be very smooth, causing a slight tremor in the human hand and the position of the ranging board will deviate. Therefore, through the cooperation of the two-way damping rod and the one-way damping rod, the ranging board will have a certain resistance during the movement, and the position of the ranging board will not change due to a slight tremor or touch of the hand. At the same time, because the one-way damping rod needs to overcome the gravity generated by the ranging board and the objects thereon, the optimal resistance value of the one-way damping rod only needs to be greater than the gravity value generated downward. This ensures that the ranging board can be easily moved without affecting the activity of the one-way damping rod, ensures the stability of the ranging board when moving, indirectly ensures the accuracy of the focusing of the measuring instrument, and ensures the detection results.

[0014] The locking part includes an electromagnet, a first extrusion block, a sliding column, a second extrusion block, and a rotating handle. Two symmetrically arranged electromagnets are fixedly installed on the placement plate. The first extrusion block is fixedly installed on one side of the electromagnet, and one end of the first extrusion block abuts against the movable end of the bidirectional damping rod. A sliding column is fixedly installed on one side of the electromagnet, and the second extrusion block is slidably connected to the sliding column, and the second extrusion block abuts against the movable end of the unidirectional damping rod. A rotating handle is fixedly installed on the ranging plate, and the switch in the rotating handle is electrically connected to the electromagnet, and the distance between the rotating handle and the bottom plate is a, 16cm<a<25cm.

[0015] When in use, the rotating handle on the ranging plate is rotated. Since a switch is installed in the rotating handle, when the switch is turned on, the electromagnet is energized to drive the first extrusion block and the sliding column away from the movable end of the damping rod, so that the movable end of the damping rod can be normally extended and retracted. Of course, since the movable end of the two-way damping rod needs to be extended and retracted, and the one-way damping rod is fixed on the movable end of the two-way damping rod, the relative position of the one-way damping rod will change, so the second extrusion block is set on the sliding column so that it can move with the movement of the one-way damping rod. When the movement is completed, the rotating handle is released, and the torsion spring in the rotating handle will push it back to its original position and Turn off the switch at this time to cut off the power to the electromagnet. At this time, the built-in spring will push the first extrusion block and the sliding column away from the movable end of the damping rod, so that the first extrusion block abuts against the movable end of the two-way damping rod, and the second extrusion block abuts against the movable end of the unidirectional damping rod, so that the ranging plate remains fixed. Of course, the distance between the rotating handle and the base plate is between 16cm and 25cm. Because the arm length of teenagers and other primary school students is between 16cm and 25cm, when they hold the rotating handle for adjustment, they can place their arms on the base plate for adjustment, so that the ranging plate can be aligned with the human eye, ensuring the accuracy of the subsequent focusing detection of the measuring instrument.

[0016] By moving the ranging board, the detection efficiency can be guaranteed while ensuring the accuracy of the detection. Of course, the facial recognition system can also be used to quickly locate and identify. However, the facial recognition system requires a huge database support, and it needs to ensure the stability of the environment when it is used. At the same time, facial recognition may make mistakes. Once an error occurs, it is difficult for the operator to judge, which ultimately leads to a large number of inaccurate inspection results.

[0017] The first extrusion block and the second extrusion block are both arc-shaped at one side close to the movable end, and a rubber pad is attached to the arc surface. The rubber pad of the first extrusion block is provided with vertical stripes, while the rubber pad of the second extrusion block is provided with horizontal stripes.

[0018] Because the two-way damping rod abutted by the first extrusion block is arranged horizontally, in order to ensure that it can be locked, it is necessary to increase its horizontal friction force. The vertical stripes can increase the horizontal friction force, making the two-way damping rod more stable. The one-way damping rod abutted by the second extrusion block is arranged vertically. Therefore, in order to ensure that it can be locked, it is necessary to increase its vertical friction force. The horizontal stripes can increase the vertical friction force, making the one-way damping rod more stable. The rubber pad and the stripes thereon can make the stability of the two-way damping rod and the one-way damping rod better and will not be disturbed by external forces.

[0019] A trigger switch is provided at the bottom of the detection frame, and the trigger switch is fixedly mounted on the bottom plate. A photosensitive sensor is installed at the top of the detection frame.

[0020] When in use, the person to be inspected needs to place his head on the detection frame and press his forehead against the photosensor on the top of the detection frame. Because the head is placed in the designated position, when the head is placed on the detection frame, the detection frame will move downward and press against the trigger switch below, turning on the trigger switch below and starting the distance measuring component to operate, which can accurately locate the position of the eyes and indirectly improve the accuracy of the equipment detection.

[0021] The distance measuring component includes a round tube, a round hole, transparent glass, and a distance measuring sensor. The round tube is fixedly installed on one side of the distance measuring board, and a round hole connected to the round tube is opened on the distance measuring board. Transparent glass is installed on one end of the round tube, and a distance measuring sensor is fixedly installed in the round tube. A ring-shaped light-emitting element is pasted on the side of the transparent glass close to the distance measuring board, and the ring-shaped light-emitting element is arranged at the extension of the transparent glass.

[0022] When in use, the person to be inspected moves the ranging board in front of his eyes. Because the ranging board is a certain distance away from the eyes of the person to be inspected, the person to be inspected cannot judge whether the ranging board is facing the pupil of the person to be inspected. Therefore, the person to be inspected needs to look at the annular light-emitting element on the transparent glass of the circular tube through the circular hole on the ranging board. When the person to be inspected can completely see the annular light-emitting element, it means that the pupil of the person to be inspected is facing the ranging board. At this time, the ranging sensor in the circular tube will emit infrared rays to measure the distance between the pupil of the person to be inspected and the ranging board. Of course, because it is transparent glass, other people can also assist the person to be inspected from the side to perform positioning and ranging. Through the above operations, the ranging board can be accurately moved to the front of the pupil, thereby improving the accuracy of the focusing of the measuring instrument and ensuring the detection results.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The person to be tested places his head on the detection frame, holds the rotating handle to open the locking part, and adjusts the position of the distance measuring plate by adjusting the component so that it is located directly in front of the eyes of the person to be tested. After the adjustment is completed, the distance measuring component measures the distance between the pupil and the distance measuring plate, and sends the distance and relative position information to the measuring instrument. The measuring instrument moves to the specified position and drives the focus mechanism to perform precise focus detection. At the same time, the person to be tested on the other side prepares, ensuring the accuracy of the equipment's focus mechanism while ensuring the working efficiency of the inspection equipment, and ensuring the accuracy of the test results.

[0025] 2. The person to be inspected moves the distance measuring board in front of his eyes. He needs to look at the annular light-emitting element on the round tube transparent glass through the circular hole on the distance measuring board. When the person to be inspected can completely see the annular light-emitting element, it means that the pupil of the person to be inspected is facing the distance measuring board. By accurately providing the pupil position to the measuring instrument, the measuring instrument ensures the accuracy of the focusing mechanism of the equipment while ensuring the working efficiency of the inspection equipment, and ensures the accuracy of the test results.

[0026] 3. When in use, the person to be inspected needs to place his head on the detection frame and press his forehead against the photosensor on the top of the detection frame. Because the head is placed in the specified position, when the head is placed on the detection frame, the detection frame will move downward and press against the trigger switch below, so that the trigger switch below turns on and the distance measuring component starts to operate. The distance measuring component will detect the position of the pupil after each adjustment of the distance measuring board position, so that the distance measuring board can accurately locate the position of the eye, indirectly improving the accuracy of equipment inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the enlarged structure of the detection frame in the present invention;

[0029] Figure 3 It is a structural schematic diagram of the bidirectional damping rod in the present invention;

[0030] Figure 4 It is a schematic diagram of the overall structure of the detection frame in the present invention;

[0031] Figure 5 It is a schematic diagram of the three-dimensional structure of the second extrusion block in the present invention;

[0032] Figure 6 It is an enlarged structural schematic diagram of the piston cylinder in the present invention;

[0033] Figure 7 It is an enlarged structural schematic diagram of the rotating handle in the present invention;

[0034] Figure 8 It is a schematic diagram of the internal structure of the circular tube in the present invention.

[0035] In the figure: 1, base plate; 2, detection frame; 3, measuring instrument; 4, rotating grip; 5, placement plate; 6, distance measuring plate; 7, one-way damping rod; 8, hydraulic pump; 9, electromagnet; 10, round tube; 11, two-way damping rod; 12, sliding column; 13, second extrusion block; 14, first extrusion block; 15, piston cylinder; 16, round hole; 17, compression spring; 18, roller; 19, hinged seat; 20, trigger switch; 21, transparent glass; 22, ring-shaped light-emitting element; 23, distance measuring sensor; 24, rubber pad; 25, inclined part. DETAILED DESCRIPTION

[0036] See also Figures 1 to 8 The present invention provides a focusing mechanism for a multi-detection position optical biometer, and the technical solution is as follows:

[0037] A focusing mechanism for a multi-detection position optical biometer, comprising a detection frame 2, wherein the number of the detection frames is two and both are installed on one side of a measuring instrument 3, a base plate 1 is provided below the measuring instrument 3, and the measuring instrument 3 is slidably connected to the base plate 1, and is characterized in that the two detection frames 2 are arranged side by side, and the detection frames 2 are slidably connected to the base plate 1 through a spring telescopic rod, a placement plate 5 is rotatably installed on the detection frame 2, a driving component is installed on the base plate 1, and the driving component is connected to the placement plate 5, two ranging plates 6 are provided on one side of the placement plate 5, an adjustment component is installed between the ranging plate 6 and the placement plate 5, and a ranging component is installed on the ranging plate 6.

[0038] Two piston cylinders 15 are installed on the bottom plate 1, and the movable end of the piston cylinder 15 is installed with a roller 18 through a hinge seat 19. A compression spring 17 abutting against the hinge seat 19 is installed on the piston cylinder 15, and a torsion spring is installed on the hinge seat 19. A hydraulic pump 8 is installed on the detection frame 2, and the rotating shaft of the hydraulic pump 8 is fixedly installed with the rotating rod of the placement plate 5. The bottom of the measuring instrument 3 is provided with an inclined portion 25, and the piston cylinder 15 is connected to the hydraulic pump 8 through a pipeline, and the piston cylinder 15 on the left side It is connected to the hydraulic pump 8 on the right side, and a bidirectional damping rod 11 is fixedly installed on the placement plate 5. One-way damping rods 7 are provided on both sides of the bidirectional damping rod 11. The movable end of the bidirectional damping rod 11 is fixedly installed with the fixed end of the one-way damping rod 7, and the movable end of the one-way damping rod 7 is fixedly installed with the ranging plate 6, and the resistance of the one-way damping rod 7 when it moves is greater than the resistance of the bidirectional damping rod 11 when it moves. A locking piece is installed on the placement plate 5, and the locking piece abuts against the one-way damping rod 7 and the bidirectional damping rod 11.

[0039] Two symmetrically arranged electromagnets 9 are fixedly mounted on the placement plate 5, a first extrusion block 14 is fixedly mounted on one side of the electromagnet 9, one end of the first extrusion block 14 abuts against the movable end of the bidirectional damping rod 11, a sliding column 12 is fixedly mounted on one side of the electromagnet 9, a second extrusion block 13 is slidably connected to the sliding column 12, the second extrusion block 13 abuts against the movable end of the unidirectional damping rod 7, a rotating handle 4 is fixedly mounted on the ranging plate 6, a switch in the rotating handle 4 is electrically connected to the electromagnet 9, and the distance between the rotating handle 4 and the base plate 1 is a, 16cm<a<25cm.

[0040] The first extrusion block 14 and the second extrusion block 13 are both arranged in an arc shape on one side close to the movable end, and a rubber pad 24 is pasted on the arc surface. The rubber pad 24 of the first extrusion block 14 is provided with vertical stripes, and the rubber pad 24 of the second extrusion block 13 is provided with horizontal stripes. A round tube 10 is fixedly installed on one side of the ranging plate 6, and a round hole 16 connected to the round tube 10 is provided on the ranging plate 6. A transparent glass 21 is installed at one end of the round tube 10, and a ranging sensor 23 is fixedly installed in the round tube 10.

[0041] A ring-shaped light-emitting element 22 is pasted on one side of the transparent glass 21 close to the ranging plate 6, and the ring-shaped light-emitting element 22 is arranged at the extension of the transparent glass 21. A trigger switch 20 is provided at the bottom of the detection frame 2, and the trigger switch 20 is fixedly installed on the base plate 1. A photosensor is installed on the top of the detection frame 2.

[0042] See also Figure 1 , Figure 2 and Figure 6 When in use, people need to place their heads on the detection frame 2. When the measuring instrument 3 moves to the left to check the person on the left, when the moving measuring instrument 3 presses against the roller 18, because the movable end of the piston cylinder 15 is connected to the roller 18 through the hinge seat 19, the roller 18 will be subjected to the thrust applied by the measuring instrument 3 on one side, and will tilt to one side due to the thrust. However, a torsion spring is installed on the hinge seat 19, so that when the roller 18 is subjected to the thrust, the spring will convert the force received into thrust, so that the movable end of the piston cylinder 15 is subjected to a downward thrust, so that the liquid in the piston cylinder 15 will enter the hydraulic pump 8 through the pipeline, so that the hydraulic pump 8 drives the rotating rod of the placement plate 5 to rotate, so that the placement plate 5 is facing downward toward the face of the person.

[0043] See also Figure 4 Because the head is placed at the designated position, when the head is placed on the detection frame 2, the detection frame 2 will move downward and press against the trigger switch 20 below, so that the trigger switch 20 below is turned on and the distance measuring component starts to operate.

[0044] See also Figure 3 and Figure 5 , rotate the rotating handle 4 on the ranging plate 6. Because a switch is installed in the rotating handle 4, when the switch is turned on, the electromagnet 9 is energized, driving the first extrusion block 14 and the sliding column 12 away from the movable end of the damping rod, so that the movable end of the damping rod can be normally extended and retracted. Of course, because the movable end of the two-way damping rod 11 needs to be extended and retracted, and the one-way damping rod 7 is fixed on the movable end of the two-way damping rod 11, the relative position of the one-way damping rod 7 will change, so the second extrusion block 13 is set on the sliding column 12, so that it can move with the movement of the one-way damping rod 7.

[0045] See also Figure 3 When in use, if a telescopic rod with smooth contraction is used to adjust the position, the distance measuring plate 6 will be very smooth, causing a slight tremor in the human hand, and the position of the distance measuring plate 6 will deviate. Therefore, through the cooperation of the two-way damping rod 11 and the one-way damping rod 7, the distance measuring plate 6 will have a certain resistance during the movement, and the position of the distance measuring plate 6 will not change due to a slight tremor or touch of the hand. At the same time, because the one-way damping rod 7 needs to overcome the gravity generated by the distance measuring plate 6 and the objects thereon, the optimal resistance value of the one-way damping rod 7 only needs to be greater than the gravity value generated downward, so as to ensure that the distance measuring plate 6 can be easily moved without affecting the activity of the one-way damping rod 7.

[0046] See also Figure 5 and Figure 7 When the movement is completed, the rotating handle 4 is released. At this time, the torsion spring in the rotating handle 4 will push it back to its original position, and turn off the switch at this time to cut off the power to the electromagnet 9. At this time, the built-in spring will push the first extrusion block 14 and the sliding column 12 away from the active end of the damping rod, so that the first extrusion block 14 is against the active end of the two-way damping rod 11, and the second extrusion block 13 is against the active end of the unidirectional damping rod 7, so that the ranging plate 6 remains in a fixed state. At the same time, the ranging component will detect the position of the pupil after each adjustment of the position of the ranging plate 6.

[0047] See also Figure 3 and Figure 8 The person to be inspected moves the ranging board 6 in front of the eyes. The person to be inspected needs to look at the annular light-emitting element 22 on the transparent glass 21 of the circular tube 10 through the circular hole 16 on the ranging board 6. When the person to be inspected can completely see the annular light-emitting element 22, it means that the pupil of the person to be inspected is facing the ranging board 6, and the pupil position is accurately provided to the measuring instrument 3.

[0048] See also Figure 1The measuring instrument 3 is driven by a motor to move so that it moves to one side to align with the human eye for precise focus detection. Because the movable end of the piston cylinder 15 moves downward, it will push the compression spring 17 through the hinge seat 19 for compression. When the measuring instrument 3 moves away from the left side to the other side, the compressed compression spring 17 will return to its original position and drive the hydraulic pump 8 to operate through the connecting pipe, so that the hydraulic pump 8 drives the placement plate 5 to return to its original position, so that when the measuring instrument 3 inspects one side, the detection frame 2 on the other side can be used by people.

[0049] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A focusing mechanism for a multi-detection position optical biometer, comprising a detection frame (2), wherein the detection frame is two in number and both are mounted on one side of a measuring instrument (3), a bottom plate (1) is provided below the measuring instrument (3), and the measuring instrument (3) is slidably connected to the bottom plate (1), characterized in that: The two detection frames (2) are arranged side by side, and the detection frames (2) are slidably connected to the bottom plate (1) through spring telescopic rods. A placement plate (5) is rotatably mounted on the detection frame (2), and a driving assembly is mounted on the bottom plate (1). The driving assembly is connected to the placement plate (5). Two distance measuring plates (6) are arranged on one side of the placement plate (5). An adjustment assembly is mounted between the distance measuring plates (6) and the placement plate (5). A distance measuring member is mounted on the distance measuring plate (6). When the measuring instrument (3) slides to one side and abuts against the driving assembly, the driving assembly drives the placement plate (5) to flip and drives the distance measuring plate (6) toward the human face, and the distance measuring plate (6) is aligned with the human eye through the adjustment assembly.

2. A focusing mechanism for a multi-detection position optical biometer according to claim 1, characterized in that: The driving assembly comprises a piston cylinder (15), a roller (18), a hydraulic pump (8), an articulated seat (19), and an inclined portion (25). Two piston cylinders (15) are installed on the base plate (1). The movable end of the piston cylinder (15) is installed with a roller (18) through the articulated seat (19). A compression spring (17) abutting against the articulated seat (19) is installed on the piston cylinder (15). A torsion spring is installed on the articulated seat (19). A hydraulic pump (8) is installed on the detection frame (2). The rotating shaft of the hydraulic pump (8) is fixedly installed on the rotating rod of the placement plate (5). The bottom of the measuring instrument (3) is provided with an inclined portion (25). The piston cylinder (15) and the hydraulic pump (8) are connected by a pipeline, and the piston cylinder (15) on the left is connected to the hydraulic pump (8) on the right.

3. The focusing mechanism for a multi-detection position optical biometer according to claim 1, characterized in that: The adjustment assembly comprises a bidirectional damping rod (11) and a unidirectional damping rod (7); the bidirectional damping rod (11) is fixedly mounted on the placement plate (5); unidirectional damping rods (7) are provided on both sides of the bidirectional damping rod (11); the movable end of the bidirectional damping rod (11) is fixedly mounted on the fixed end of the unidirectional damping rod (7); the movable end of the unidirectional damping rod (7) is fixedly mounted on the distance measuring plate (6); and the resistance of the unidirectional damping rod (7) when it moves is greater than the resistance of the bidirectional damping rod (11) when it moves; a locking piece is mounted on the placement plate (5); and the locking piece abuts against the unidirectional damping rod (7) and the bidirectional damping rod (11).

4. A focusing mechanism for a multi-detection position optical biometer according to claim 3, characterized in that: The locking member comprises an electromagnet (9), a first extrusion block (14), a sliding column (12), a second extrusion block (13), and a rotating handle (4). Two symmetrically arranged electromagnets (9) are fixedly mounted on the placement plate (5). A first extrusion block (14) is fixedly mounted on one side of the electromagnet (9). One end of the first extrusion block (14) abuts against the movable end of the bidirectional damping rod (11). A sliding column (12) is fixedly mounted on one side of the electromagnet (9). A second extrusion block (13) is slidably connected to the sliding column (12). The second extrusion block (13) abuts against the movable end of the unidirectional damping rod (7). A rotating handle (4) is fixedly mounted on the distance measuring plate (6). A switch in the rotating handle (4) is electrically connected to the electromagnet (9). The distance between the rotating handle (4) and the bottom plate (1) is a, 16 cm < a < 25 cm.

5. A focusing mechanism for a multi-detection position optical biometer according to claim 4, characterized in that: The first extrusion block (14) and the second extrusion block (13) are both arc-shaped on one side close to the movable end, and a rubber pad (24) is adhered to the arc surface; the rubber pad (24) of the first extrusion block (14) is provided with vertical stripes, and the rubber pad (24) of the second extrusion block (13) is provided with horizontal stripes.

6. The focusing mechanism for a multi-detection position optical biometer according to claim 1, characterized in that: The distance measuring component comprises a circular tube (10), a circular hole (16), a transparent glass (21), and a distance measuring sensor (23); the circular tube (10) is fixedly mounted on one side of the distance measuring plate (6); the distance measuring plate (6) is provided with a circular hole (16) which is in communication with the circular tube (10); the transparent glass (21) is mounted on one end of the circular tube (10); and the distance measuring sensor (23) is fixedly mounted inside the circular tube (10).

7. A focusing mechanism for a multi-detection position optical biometer according to claim 6, characterized in that: A ring-shaped light-emitting element (22) is attached to a side of the transparent glass (21) close to the distance measuring plate (6), and the ring-shaped light-emitting element (22) is arranged at the extension of the transparent glass (21).

8. The focusing mechanism for a multi-detection position optical biometer according to claim 7, characterized in that: A trigger switch (20) is provided at the bottom of the detection frame (2), and the trigger switch (20) is fixedly mounted on the bottom plate (1). A photosensitive sensor is installed at the top of the detection frame (2).

Images