Optical biometric apparatus with multiple measurement surfaces and fast zooming module

Abstract

The present application relates to the technical fields of measuring equipment, in particular to a kind of optical biological measuring instrument multi-measuring surface quick zoom module, including shell, screw rod, fixed seat, mounting seat, adjusting mechanism, placement platform, positioning frame, locking assembly, limit block, the shell is installed in biological measuring instrument interior, the screw rod is installed on shell, the fixed seat is installed in screw rod front end, the mounting seat is installed on screw rod, the placement platform is located above mounting seat, the limit block is located on positioning frame, the adjusting mechanism adjusts the coarseness of the position of placement platform and is fixed by positioning frame, the locking assembly records the position of placement platform on positioning frame by limit block, the adjusting mechanism moves to the limit block recording point and forms speed difference, by adjusting the position of the eyepiece is fixed after completion simultaneously recording the position of this adjustment, to further realize the convenience of reset focal length.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of measuring equipment, in particular to a multi-measuring surface fast zoom module of an optical biological measuring instrument. BACKGROUND

[0002] The optical biological measuring instrument is an instrument for measuring and analyzing biological samples or organisms, which is based on optical principles and technologies, and obtains relevant information of biological samples through collection, processing and analysis of optical signals. Since it can measure multiple measuring surfaces to obtain the required data and thus know the diversity of biological samples, it is commonly used in medicine for diagnosis, treatment monitoring and physiological research.

[0003] For ophthalmic hospitals, it is a common way to detect and diagnose eye diseases through optical coherence tomography (OCT) by using an optical biological measuring instrument. When checking different diseases such as glaucoma and retinal detachment, the distance between the ocular lens and the objective lens needs to be adjusted to achieve focal length adjustment, and thus clear images are obtained. In the process of setting the scanning depth range, the focal length does not need to change, but when the symptoms need to be adjusted in different scanning areas, the focal length adjustment is synchronized with the scanning area adjustment, and thus the focal length changes. When the next project is checked and the scanning area is the same as before, the focal length needs to be adjusted again. In the prior art, the focal point is limited within a certain range by moving the handle forward and backward, and then the focal point is made clear by fine adjustment. However, the position needs to be checked repeatedly during the forward and backward movement of the handle, and since the distance moved by the handle is short, the hand is easy to exceed the limit range of fine adjustment under force, so the handle needs to be adjusted in the opposite direction. Multiple adjustments will reduce the measurement efficiency and affect the measurement accuracy.

[0004] To solve the above problems, the prior art proposes a solution, such as CN110989270A, a kind of fast automatic zoom device, which drives gear rotation through transmission mechanism, and then drives focusing cylinder rotation. The cooperation of guide nail and guide groove ensures the stability and directionality of moving seat, avoiding deviation. The moving seat moves axially along the inner cavity of step seat, and the inner and outer threaded pair transmission realizes fast movement. Although fast movement is realized to achieve the function of rapid adjustment of focal length, the problem of repeated adjustment of focal length and difficulty in calibration during detection of different types of eye diseases is still not solved. SUMMARY

[0005] The present application provides a multi-measuring surface fast zoom module of an optical biological measuring instrument. To solve the problem of difficulty in rough adjustment of ocular lens to reset the position of focal length after detection of different types of eye diseases, the present application fixes the ocular lens after adjustment and records the position of this adjustment, thereby achieving the convenience of resetting the focal length.

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

[0007] The present application provides a kind of optical biometric instrument multi-measuring surface fast zoom module, including shell, screw rod, fixed seat, mounting seat, adjusting mechanism, placement platform, positioning frame, locking assembly, limit block, the shell is installed in biometric instrument interior, the screw rod is installed on shell, screw rod is used to fine adjustment placement platform position, the fixed seat is installed at screw rod front end, fixed seat is used to connect mirror or objective lens, while the movement of objective lens is not considered in the present application, the mounting seat is installed on screw rod, the placement platform is located above mounting seat, objective lens can be placed on placement platform, further can be adjusted the position of mounting seat by screw rod, further adjust the position of placement platform and objective lens, the adjusting mechanism is located at mounting seat, adjusting mechanism is used to realize the coarse adjustment of objective lens, the positioning frame is installed in shell, positioning frame is used to fix the interval range after the coarse adjustment of objective lens, the locking assembly is located at positioning frame, locking assembly is used to realize the deceleration of objective lens movement grading while also recording the position of objective lens after adjustment, in turn, it is convenient for the reset of next measurement, the limit block is located on positioning frame, limit block realizes the location of each fixed coarse adjustment, screw rod has certain self-locking, so it can be fixed by screw rod itself after fine adjustment, the adjusting mechanism adjusts the coarseness of placement platform position and is fixed by positioning frame, the locking assembly records the position of placement platform on positioning frame by limit block and prompts when adjusting mechanism resets, during the adjustment process, according to the position of required recording point, in turn, limit block is lowered by corresponding amount, in turn, form multi-point record, and the less the number of records, the faster the zoom speed is;In turn, the objective lens after coarse adjustment is preliminarily fixed, on the one hand, it is convenient for fast zoom, on the other hand, it can record zooming times, in turn, it can check subject.

[0008] Preferably, the adjusting mechanism includes sliding groove, sliding block, drive rod, moving slot, moving rod, dial block, extrusion block, the sliding groove is opened in both sides of mounting seat, the sliding block is connected with sliding groove, the sliding block is connected with placement platform, the drive rod is installed behind sliding block, the moving slot is opened in the left side of drive rod, the moving rod is located in moving slot and slides left and right, the dial block is installed at the right end of moving rod, the extrusion block is installed at the right side of dial block, drive limit block to fix the coarse adjustment of placement platform by the setting of adjusting assembly, cooperate with screw rod to adjust the position of objective lens, in turn, form zooming process;

[0009] Preferably, the locking assembly comprises a fixed frame, a fixed shaft, a torsion spring, a folding plate, a reset slot, a locking rod, a reset block, a compression spring, an extension block, the fixed frame is installed on the positioning frame, the fixed shaft is installed on the fixed frame, the number of the fixed shaft is multiple, the torsion spring is installed on the fixed shaft, the other end of the torsion spring is installed on the folding plate, the reset slot is opened on the positioning frame, the locking rod is slidingly connected in the reset slot, the reset block is installed on the locking rod close to the shift block, the limiting block is connected with the locking rod, the number of the limiting block is multiple, the limiting block is in contact with the folding plate, the compression spring is installed on the sliding block, the extension block is installed on the other end of the compression spring, and the extension block is below the shift block; the limiting block is fixed through the folding plate, the fixed point of the limiting block is marked, the shift block is briefly fixed, and the stability of adjustment is improved.

[0010] Preferably, the limiting block and the locking rod are connected through the reset spring, the connecting part of the locking rod and the limiting block is provided with a placing slot, and the limiting block and the locking rod are connected through mortise and tenon joint; the spring mortise and tenon joint utilizes the elasticity of the reset spring and the structure design of the mortise and tenon joint, so that the effect of small friction in movement and large friction in static is realized.

[0011] Preferably, the limiting block is provided with a clamping groove, the height value of the clamping groove is equivalent to the height value of the folding plate, the clamping groove can fix the position of the limiting block, and the stability of the device is improved.

[0012] Preferably, the contact surface of the extrusion block and the limiting block is provided with a concave-convex structure, the positioning frame is provided with a fixed slot corresponding to the extrusion block, and the width of the fixed slot is greater than the width of the extrusion block; thus, after the extrusion block reaches the fixed slot, the extrusion block can be moved in position under the action of the screw rod, so as to provide a certain space for supply; the extrusion block and the limiting block can enhance the fixing effect, and in the process of adjustment, the concave-convex structure reduces the resistance of the limiting block relative to the extrusion block, so as to improve the overall adjustment efficiency.

[0013] Preferably, the lower surface and the front surface of the extrusion block are inclined surfaces, and the top of the limiting block is an arc-shaped wedge surface; the arc-shaped wedge surface of the top of the limiting block can always be tangent to the lower surface of the extrusion block, so as to change the surface contact into line contact, thereby reducing the friction between the two.

[0014] Preferably, the front surface of the reset block is provided with a rubber protrusion, the rear surface of the shift block is a circular arc surface, and the circular arc surface of the shift block is provided with a protrusion; the rubber protrusion and the protrusion are arranged, so that the shift block can form a buffer when contacting the reset block.

[0015] Preferably, the protrusions and the protrusions are staggered, and the surfaces of the limiting block and the folding plate are coated with an aluminum oxide coating; the protrusions and the protrusions can be staggered, so as to increase the contact area of the two.

[0016] Preferably, the protrusion is arranged opposite to the protruding block, and the top surface of the protrusion and the protruding block are spherical surfaces, which can slow down the moving speed of the reset block, synchronously reduce the sliding speed of the limiting block and the folding plate, further reduce the friction between the two, and further reduce the friction through uneven differential speed.

[0017] The beneficial effects of the present application are as follows:

[0018] 1. The optical biometric instrument multi-measurement surface fast zoom module adjusts the precision through the screw rod, adjusts the roughness through the driving rod, avoids the problems of slow speed of single screw rod adjustment and too large interval of single movement through the composite adjustment mode, and further realizes the effect of fast zoom.

[0019] 2. The optical biometric instrument multi-measurement surface fast zoom module intermittently extrudes the limiting block through the driving rod, forms multiple strokes from the complete stroke, fixes a certain stroke, realizes the rough fixing of the placement table position, locks the limiting block through the locking assembly, improves the fixing effect of the placement table, records the fixed position of the placement table through the limiting block, and quickly resets when the same person is measured.

[0020] 3. The optical biometric instrument multi-measurement surface fast zoom module blocks the telescopic block through the limiting block, forms the speed difference when the driving rod slides, the node of the speed difference is the focal length used in advance, only needs to observe at different nodes, does not need to estimate and repeatedly adjust the specific position, improves the zoom speed, and further resets through the reset rod after completing the measurement, and is convenient for the measurement of the second person. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are one embodiment of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0022] Figure 1 is a schematic view of the position of the present application;

[0023] Figure 2 is a schematic view of the overall structure of the present application;

[0024] Figure 3 is a schematic view of the adjusting mechanism of the present application;

[0025] Figure 4 is a schematic view of the locking assembly of the present application;

[0026] Figure 5 is Figure 4 is an enlarged view of A in

[0027] Figure 6 is a schematic view of the limiting block in different positions of the present application;

[0028] Figure 7 is a schematic view of the protrusion and the protruding block of the present application.

[0029] In the figure: 1, housing; 2, screw rod; 3, mounting seat; 4, fixed seat; 5, adjusting mechanism; 51, sliding groove; 52, sliding block; 53, driving rod; 54, moving groove; 55, moving rod; 56, shifting block; 561, circular arc surface; 562, protruding block; 57, extrusion block; 6, placing table; 7, positioning frame; 8, locking assembly; 81, fixed frame; 82, fixed shaft; 83, torsional spring; 84, folding plate; 85, reset groove; 86, locking rod; 87, reset block; 871, protrusion; 88, compression spring; 89, telescopic block; 9, limiting block; 91, reset spring; 92, clamping groove. DETAILED DESCRIPTION

[0030] In order to better understand the above-mentioned scheme, the above-mentioned technical solutions will be described in detail below in combination with the accompanying drawings and specific embodiments.

[0031] As Figures 1-2As shown, the present application provides a kind of optical biometry multi-measuring surface fast zoom module, including shell 1, screw rod 2, mounting seat 3, fixed seat 4, adjusting mechanism 5, placement platform 6, positioning frame 7, locking assembly 8, limit block 9, the shell 1 is installed in biometry inside, the screw rod 2 is installed on shell 1, screw rod 2 is used for fine adjustment the position of placement platform 6, the fixed seat 4 is installed at the front end of screw rod 2, and the fixed seat 4 is used to connect the objective or objective, while the movement of objective is not considered in the present application, the mounting seat 3 is installed on screw rod 2, the placement platform 6 is located above mounting seat 3, and the eyepiece can be placed on the placement platform 6, then the position of mounting seat 3 can be adjusted by screw rod 2, further adjust the position of placement platform 6 and eyepiece, the adjusting mechanism 5 is located at mounting seat 3, and the adjusting mechanism 5 is used to realize the coarse adjustment of placement platform 6, the positioning frame 7 is installed in shell 1, and the positioning frame 7 is used to fix the interval range after coarse adjustment of placement platform 6, the locking assembly 8 is located at positioning frame 7, and the locking assembly 8 is used to record the position of placement platform 6 after adjustment while realizing the step deceleration of the movement of placement platform 6, so as to facilitate the reset during next measurement, the limit block 9 is located on positioning frame 7, and the limit block 9 realizes the location of each fixed coarse adjustment, screw rod 2 has certain self-locking property, so the fixation of placement platform 6 can be realized after self-fine adjustment of screw rod 2, the adjusting mechanism 5 adjusts the roughness of the position of placement platform 6 and is fixed by positioning frame 7, the locking assembly 8 records the position of placement platform 6 on positioning frame 7 by limit block 9 and prompts when adjusting mechanism 5 resets, during the adjustment process, according to the position of the required recording point, then limit block 9 moves down by a corresponding amount, and then multiple-point recording is formed, and the less the number of records, the faster the zoom speed.

[0032] In the prior art, the rough position of eyepiece is set by numerical control, and then the position of eyepiece before adjustment can be adjusted, so as to realize the zooming process. However, the eye structures of different people are different, so it is impossible to set fixed parameters for adjustment at the same position. At this time, it is necessary to constantly change data and parameters, and obviously it is impossible to realize the fast zooming process. Moreover, it takes a certain time to write programs and codes, and the accuracy is affected by many factors, such as current and electronic components, so it is difficult to guarantee the stability compared with mechanical structure.

[0033] The present application adjusts the position of eyepiece by mechanical driving adjusting mechanism 5, and then preliminarily fixes the eyepiece at the coarse adjustment position. At this time, locking assembly 8 drives limit block 9 to extend and lock, and then records the position of eyepiece and the number of adjustments at this time. On the one hand, it is convenient for fast zooming, and on the other hand, it can record the number of zooming, so as to check the subject.

[0034] As Figures 1-3As shown, the adjustment mechanism 5 includes a slide groove 51, a slider 52, a drive rod 53, a moving groove 54, a moving rod 55, a lever 56, and a pressing block 57. The slide groove 51 is opened on both sides of the mounting base 3. The slider 52 is connected to the slide groove 51 and the slider 52 is connected to the placement platform 6. The drive rod 53 is installed behind the slider 52. The moving groove 54 is opened on the left side of the drive rod 53. The moving rod 55 slides left and right within the moving groove 54. The lever 56 is installed at the right end of the moving rod 55. The pressing block 57 is installed on the right side of the lever 56.

[0035] Drive rod 53 moves back and forth by manual or electric push rod. Drive rod 53 drives slider 52 to slide in slide groove 51. In turn, slider 52 can drive the placement platform 6 on mounting base 3 to move along mounting base 3. At the same time, a moving groove 54 is opened on drive rod 53. Moving rod 55 in moving groove 54 can slide along moving groove 54. Moving rod 55 can be pushed by button or micro electric push rod. Moving rod 55 pushes toggle block 56. Toggle block 56 drives squeezing block 57 to move towards positioning frame 7. At the same time, it squeezes down limiting block 9. Since squeezing block 57 is located inside positioning block after being squeezed, positioning frame 7 achieves the function of initially fixing squeezing block 57.

[0036] Meanwhile, the slider 52 and the groove 51 are slidably connected. In order to make up for the stability of sliding, the contact surface between the two is set to be a smooth surface.

[0037] like Figures 1-4 As shown, the locking assembly 8 includes a fixed frame 81, a fixed shaft 82, a torsion spring 83, a folding plate 84, a reset groove 85, a locking rod 86, a reset block 87, a compression spring 88, and a telescopic block 89. The fixed frame 81 is mounted on the positioning frame 7, the fixed shaft 82 is mounted on the fixed frame 81, and there are multiple fixed shafts 82. The torsion spring 83 is mounted on the fixed shaft 82, the folding plate 84 is mounted on the other end of the torsion spring 83, the reset groove 85 is opened on the positioning frame 7, the locking rod 86 is slidably connected in the reset groove 85, the reset block 87 is mounted on the locking rod 86 near the lever 56, the limiting block 9 is connected to the locking rod 86, there are multiple limiting blocks 9, the limiting block 9 is in contact with the folding plate 84, the compression spring 88 is mounted on the slider 52, and the telescopic block 89 is mounted on the other end of the compression spring 88, and the telescopic block 89 is located below the lever 56.

[0038] The fixed frame 81 is a horizontal plate, the fixed shaft 82 is installed on the right side of the fixed frame 81, the fixed shaft 82 is a cylinder, the two ends of the fixed shaft 82, one end is connected with the fixed frame 81, the other end is connected with the torsion spring 83, the other end of the torsion spring 83 is connected with the folding plate 84, the folding plate 84 is a pair of corresponding group, the fixed frame 81 is installed with several groups of folding plate 84, corresponding to several limiting blocks 9, the reset slot 85 is located in front of the fixed frame 81, the locking rod 86 is located above the fixed frame 81, the reset block 87 is wedge-shaped, just corresponding to the rear end of the push block 56, and then after completing the detection, the staff drives the push block 56 to move backward through the driving rod 53, the wedge surface at the rear end of the push block 56 pushes the reset block 87 to slide transversely in the reset slot 85, the reset block 87 drives the locking rod 86 to move transversely, at this time, part of the limiting block 9 is clamped between the two folding plates 84, and the rest of the limiting block 9 is located above the folding plate 84, when the locking rod 86 moves transversely, the limiting block 9 moves transversely synchronously, and then gradually separates from the position of the folding plate 84, the limiting block 9 and the locking rod 86 are connected through the reset spring 91, under the action of the reset spring 91, the limiting block 9 originally clamped by the folding plate 84 is pulled to the initial position, i.e. above the folding plate 84, and after the push block 56 leaves the reset block 87, the stretch spring is installed in the sliding groove 51 at this time, the stretch spring drives the locking rod 86 to reset, so that the point position marking can be performed again;

[0039] After the coarse adjustment is completed, the moving rod 55 drives the push block 56 to move right, at this time, the extrusion block 57 approaches the right end surface of the positioning frame 7, on the one hand, the limiting block 9 is gradually extruded, and the limiting block 9 moves downward synchronously, thereby pressing the folding plate 84, when the gap between the folding plate 84 is greater than the width of the limiting block 9, at this time, the limiting block 9 continues to move downward, thereby passing through the folding plate 84, and the synchronous folding plate 84 is clamped by the limiting block 9 under the influence of the torsion spring 83, thereby forming a marking point, in the process of moving the sliding block 52, the telescopic block 89 moves synchronously, and is blocked when contacting the limiting block 9, thereby affecting the moving speed of the driving rod 53, in this process, the differential will realize the identification function, at the same time, an electric signal driven sensor can also be used to deliver to the user, thereby realizing the warning effect;

[0040] If this is not the point to be measured after the telescopic block 89 is blocked, the driving rod 53 needs to be continuously moved to drive the sliding block 52 to move, at this time, the telescopic block 89 is contracted under the action of the compression spring 88, thereby passing through the limiting block 9 and continuing to move forward or backward.

[0041] The locking rod 86 is connected with the limiting block 9, and a mounting groove is arranged at the connecting position of the locking rod 86 and the limiting block 9. The mortise and tenon joint of the spring at the connecting position is not made of wood material, but made of metal material, which can ensure the up-down sliding of the limiting block 9. However, when the device is static, the reset spring 91 can keep a certain pressure, so that the tenon on the limiting block 9 and the mortise on the locking rod 86 are in close contact, thereby increasing the friction force, and improving the stability and carrying capacity of the connection. The reset spring 91 is usually embedded on one side of the tenon, which can allow some small relative movement between the tenon and the mortise, thereby reducing the friction force at the connecting position, and making the limiting block 9 more easily move.

[0042] As shown in Figures 1-6 The limiting block 9 is provided with a clamping groove 92, and the height of the clamping groove 92 is equal to the height of the folding plate 84. The clamping groove 92 is clamped with the folding plate 84, so that the folding plate 84 can be clamped into the clamping groove 92 during the recovery process, thereby improving the stability of the limiting block 9. At the same time, the folding plate 84 itself will shake, and the clamping groove 92 can fix the position of the limiting block 9, thereby improving the stability of the device.

[0043] The contact surface of the extrusion block 57 and the limiting block 9 is provided with a concave-convex structure, and a fixed groove is arranged on the positioning frame 7 corresponding to the extrusion block 57. The concave-convex structure is used to increase the static friction force between the extrusion block 57 and the limiting block 9, and to reduce the friction force when they move relative to each other. The principle is that the actual contact area is reduced during movement, and the friction force is increased during static state due to the easy embedding of the concave-convex structure. Therefore, the extrusion block 57 and the limiting block 9 can enhance the fixing effect when the placing table 6 is fixed in rough accuracy, and the concave-convex structure reduces the resistance of the limiting block 9 relative to the extrusion block 57 during adjustment, thereby improving the overall adjustment efficiency.

[0044] The lower surface and the front surface of the extrusion block 57 are both inclined surfaces, and the top of the limiting block 9 is an arc-shaped wedge surface. The extrusion block 57 is a special-shaped structure, so that the extrusion block 57 can move smoothly when moving rightward to extrude the limiting block 9 and moving forward and backward to push the limiting block 9. The arc-shaped wedge surface at the top of the limiting block 9 can always be tangent to the lower surface of the extrusion block 57, thereby changing the surface contact into line contact, thereby reducing the friction force between them.

[0045] As shown in Figures 1-7As shown, the reset block 87 is provided with a rubber protrusion 871 in front, and the back of the dial block 56 is a circular arc surface 561, and the dial block 56 is provided with a protrusion 562 on the circular arc surface 561. During the movement of the dial block 56, it will be in hard contact with the reset block 87. If no setting is made, after multiple resets, the dial block 56 and the reset block 87 will inevitably be worn or damaged. By setting the rubber protrusion 871 and the protrusion 562, the dial block 56 can form a buffer when it contacts the reset block 87, and the existing circular arc tip contacts, and then the side wall contacts, thereby reducing the impact and forming a differential deceleration.

[0046] The protrusion 871 and the protrusion 562 are staggered, and the limiting block 9 and the folding plate 84 are coated with an aluminum oxide coating. This connection allows the protrusion 871 and the protrusion 562 to stagger with each other when the limiting block 9 is reset, thereby increasing the contact area and sharing the pressure, avoiding damage caused by excessive local stress. At the same time, the limiting block 9 and the folding plate 84 are coated with an aluminum oxide coating. When the limiting block 9 and the folding plate 84 are separated under the action of the reset spring 91, they will contact and rub each other. The aluminum oxide coating is wear-resistant and reflective under normal conditions. When the internal light improves the clarity of the objective lens, the aluminum oxide coating can reflect the light source to further improve the clarity.

[0047] The protrusion 871 and the protrusion 562 are arranged opposite to each other, and the top surfaces of the protrusion 871 and the protrusion 562 are spherical surfaces.

[0048] This connection allows the protrusion 871 and the protrusion 562 to be in contact with each other when they are close. At this time, affected by the transverse arrangement of the reset slot 85, the reset block 87 will have a tendency to move to the right, thereby causing the protrusion 871 and the protrusion 562 to abut against each other, and then stagger with each other, and then abut against each other. At this time, the movement speed of the reset block 87 will be slowed down, and the sliding speed of the limiting block 9 and the folding plate 84 will be reduced, thereby reducing the friction between the two. By uneven differential speed, the friction is further reduced, and the spherical surface prevents interference between the two.

[0049] When multiple measurements of the patient's eye are required, the adjusting mechanism 5 is operated by the handle or the motor, the adjusting mechanism 5 drives the placement table 6 to slide on the mounting seat 3, and then intermittently presses the limiting block 9, after the coarse focus is determined, the locking mechanism at the positioning frame 7 is driven by the adjusting mechanism 5 to lock the limiting block 9, and the fixed seat 4 is driven to move forward and backward by rotating the screw 2, and the precision adjustment is performed, after the first focus adjustment is completed, the second focus needs to be adjusted, at this time, the user continues to move the reset mechanism to drive the remaining limiting blocks 9 to move up and down, and the same adjustment method is performed after reaching the second focus, however, when the same measurement as the first focus is encountered, the adjusting mechanism 5 only needs to be moved, and then the differential change is sensed by the handle or the sensor, so that observation can be performed, and then rapid zooming is realized;

[0050] Specifically, the driving rod 53 is moved forward and backward by the handle or the electric push rod, the sliding block 52 is moved forward and backward in the sliding groove 51 on the mounting seat 3 by the driving rod 53, the moving groove 54 is formed in the driving rod 53, the moving rod 55 is slidably connected in the moving groove 54, the moving rod 55 drives the shift block 56 to move in the process of moving, the shift block 56 drives the extrusion block 57 to move, and then the extrusion block 57 is moved forward and backward by the driving rod 53, and then intermittently presses the limiting block 9, the limiting block 9 is installed at the positioning frame 7, the fixed frame 81 and the locking rod 86 are installed on the positioning frame 7, the fixed frame 81 is located below the locking rod 86, the fixed shaft 82 is installed on the fixed frame 81, the torsional spring 83 is installed on the fixed shaft 82, and the folding plate 84 is located below the limiting block 9, when the coarse focus is determined, the moving rod 55 is slid in the moving groove 54 by the sensor or manually, the shift block 56 and the extrusion block 57 are moved into the fixed groove on the positioning frame 7 by the moving rod 55, and then the fixed groove is formed, and the limiting block 9 is moved downward by the extrusion block 57, and then the limiting block 9 is compressed to pass the folding plate 84, and the folding plate 84 has a tendency to reset under the action of the torsional spring 83, so that the folding plate 84 is folded to limit the positioning block when the positioning block is located at the bottom of the folding plate 84; when zooming, the driving rod 53 is moved forward and backward by resetting the moving rod 55, and then the extrusion block 57 is moved forward and backward, and then the limiting block 9 is intermittently pressed, and when it is required to return to the last focus position, the telescopic block 89 on the sliding block 52 contacts the limiting block 9 fixed by the folding plate 84, and then the moving speed of the driving rod 53 is affected by the difference, and then the point is confirmed as the recorded point, when there are multiple points, the positions of the multiple points are sensed by the difference, and then the coarse focus is measured after the sliding driving block is slid, and then the process of rapid zooming is realized;

[0051] When it is needed to reset, the driving rod 53 is moved backward, the knob 56 is contacted with the reset block 87, the reset block 87 and the locking rod 86 are moved rightward, all the limiting blocks 9 are reset, the locking rod 86 is reset under the influence of the stretching spring in the reset slot 85, all the limiting blocks 9 are above the folding plate 84, and the next measurement is performed.

[0052] The basic principles and advantages of the present application are shown and described above, and the present application is not limited by the above-mentioned embodiments. Various changes and improvements can be made to the present application without departing from the principles and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A multi-measurement plane fast zoom module for an optical biometric instrument, characterized by: The utility model provides a biological measurement instrument, including shell (1), screw rod (2), mounting base (3), fixed base (4), adjusting mechanism (5), placing table (6), positioning frame (7), locking assembly (8), limiting block (9), the shell (1) is installed in biological measurement appearance inside, the screw rod (2) is installed on the shell (1), the mounting base (3) is installed on the screw rod (2), the fixed base (4) is installed on the screw rod (2) front end, the placing table (6) is located above mounting base (3), the adjusting mechanism (5) is at mounting base (3), the positioning frame (7) is installed in the shell (1), the locking assembly (8) is at positioning frame (7), the limiting block (9) is on positioning frame (7), the adjusting mechanism (5) adjusts the position of placing table (6) and is fixed through positioning frame (7), the locking assembly (8) records the position of placing table (6) on positioning frame (7) through limiting block (9), the adjusting mechanism (5) moves to the recording point of limiting block (9) and forms the speed difference.

2. The multi-measurement surface fast zoom module of the optical biometric apparatus according to claim 1, characterized in that: The adjusting mechanism (5) includes a sliding groove (51), a sliding block (52), a drive rod (53), a moving slot (54), a moving rod (55), a dial block (56), and an extrusion block (57). The sliding groove (51) is formed on both sides of the mounting base (3). The sliding block (52) is connected with the sliding groove (51). The sliding block (52) is connected with the placing table (6). The drive rod (53) is installed behind the sliding block (52). The moving slot (54) is formed on the left side of the drive rod (53). The moving rod (55) slides left and right in the moving slot (54). The dial block (56) is installed on the right end of the moving rod (55). The extrusion block (57) is installed on the right side of the dial block (56).

3. The multi-measurement surface fast zoom module of the optical biometric apparatus according to claim 2, characterized in that: The locking assembly (8) includes a fixed frame (81), a fixed shaft (82), a torsion spring (83), a folding plate (84), a reset slot (85), a locking rod (86), a reset block (87), a compression spring (88), and a telescopic block (89). The fixed frame (81) is installed on the positioning frame (7). The fixed shaft (82) is installed on the fixed frame (81). The number of fixed shafts (82) is multiple. The torsion spring (83) is installed on the fixed shaft (82). The folding plate (84) is installed on the other end of the torsion spring (83). The reset slot (85) is formed on the positioning frame (7). The locking rod (86) is slidingly connected in the reset slot (85). The reset block (87) is installed on the locking rod (86) near the dial block (56). The limiting block (9) is connected with the locking rod (86). The number of limiting blocks (9) is multiple. The limiting block (9) is in contact with the folding plate (84). The compression spring (88) is installed on the sliding block (52). The telescopic block (89) is installed on the other end of the compression spring (88). The telescopic block (89) is below the dial block (56).

4. The multi-measurement surface fast zoom module of the optical biometric apparatus according to claim 3, characterized in that: The reset spring (91) is installed on the limiting block (9). The other end of the reset spring (91) is connected with the locking rod (86). The limiting block (9) is connected with the locking rod (86) through mortise and tenon joint.

5. The optical biometric multi-plane fast zoom module according to claim 4, characterized in that: The limiting block (9) is provided with a clamping groove (92), and the height of the clamping groove (92) is equal to the height of the folding plate (84).

6. The optical biometric multi-plane fast zoom module according to claim 5, characterized in that: The contact surface of the extrusion block (57) and the limiting block (9) is provided with a concave-convex structure, and the corresponding extrusion block (57) of the positioning frame (7) is provided with a fixing groove.

7. The multi-measurement surface fast zoom module of the optical biometric apparatus according to claim 6, characterized in that: The lower surface and the front surface of the extrusion block (57) are both inclined surfaces, and the top of the limiting block (9) is an arc-shaped wedge surface.

8. The multi-measurement surface fast zoom module of the optical biometric apparatus according to claim 3, characterized in that: The front surface of the reset block (87) is provided with a rubber protrusion (871), the rear surface of the push block (56) is a circular arc surface (561), and the circular arc surface (561) of the push block (56) is provided with a protrusion (562).

9. The optical biometric multi-plane fast zoom module according to claim 8, characterized in that: The protrusion (871) and the protrusion (562) are staggered, and the surface of the limiting block (9) and the folding plate (84) is coated with an aluminum oxide coating.

10. The optical biometric multi-plane fast zoom module according to claim 9, characterized in that: The protrusion (871) and the protrusion (562) are arranged opposite to each other, and the top surface of the protrusion (871) and the protrusion (562) is a spherical surface.

Images