Zoom lens switching device

Abstract

The utility model discloses a zoom lens switching device, which comprises a mounting plate, a first support, a second support, a first zoom lens, a second zoom lens and a driving assembly, the first support and the second support are movably arranged on the mounting plate, the first zoom lens is arranged on the first support, the second zoom lens is arranged on the second support, and the driving assembly is arranged on the second support. The first zoom lens is installed on the first support, the second zoom lens is installed on the second support, and the driving assembly is used for driving the first support and the second support to move along a preset track so as to drive the first zoom lens and the second zoom lens to be alternately switched between a working station and a standby station. According to the utility model, rapid switching of different zoom lenses can be realized, manual replacement is not needed, the labor cost is saved, and the detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to microscope technical field, concretely relates to a zoom lens switching device. BACKGROUND

[0002] The zoom lens in the microscope is a continuous zoom optical assembly composed of multiple lenses, which is usually integrated between the objective lens and the eyepiece. According to the multi-scale observation requirement of the sample, the low-power and high-power modes need to be quickly switched in a single detection to realize global positioning and detail analysis.

[0003] However, the existing zoom lens is generally fixedly installed on the mounting plate through fasteners. If different magnification zoom lenses are needed to be replaced, different magnification zoom lenses need to be frequently disassembled and assembled manually, which leads to high labor cost and low detection efficiency. UTILITY MODEL CONTENT

[0004] In order to overcome the shortcomings of the prior art, the utility model provides a zoom lens switching device, which can realize quick switching of different zoom lenses, does not need manual replacement, saves labor cost and improves detection efficiency.

[0005] The utility model solves the technical problems by adopting the following technical scheme:

[0006] A zoom lens switching device, comprising a mounting plate, a first support, a second support, a first zoom lens, a second zoom lens and a driving assembly, the first support and the second support are movably arranged on the mounting plate, the first zoom lens is installed on the first support, the second zoom lens is installed on the second support, and the driving assembly is used to drive the first support and the second support to move along a preset track to drive the first zoom lens and the second zoom lens to alternately switch between a working station and a standby station.

[0007] As a further improvement of the above technical scheme, the driving assembly comprises a motor, a driving pulley, a rotating shaft, a driven pulley and a belt, the driving pulley is fixedly connected to the output shaft of the motor, the driven pulley is fixedly connected to the rotating shaft, the rotating shaft is rotatably connected to the mounting plate, and the belt is connected around the driving pulley and the driven pulley to form a closed loop transmission structure, and the first support and the second support are fixedly connected to the belt through fasteners.

[0008] As a further improvement of the above technical scheme, the diameters of the driving pulley and the driven pulley are the same.

[0009] As a further improvement of the above technical scheme, the first support and the second support are located on opposite sides of the belt respectively.

[0010] As a further improvement of the above technical solution, the inner side of the belt is provided with a first tooth shape, the outer periphery of the driving pulley and the driven pulley is provided with a second tooth shape, and the first tooth shape is engaged with the second tooth shape.

[0011] As a further improvement of the above technical solution, the fastener comprises a pressing plate and two bolts, two through holes are formed in the pressing plate, the distance between the two through holes is greater than the width of the belt, the diameter of the through holes is greater than the diameter of the rod of the bolt and less than the diameter of the head of the bolt, two threaded holes are formed in the side of the first support and the second support close to the belt, the two threaded holes correspond to the two through holes respectively, and the bolt is threadedly connected with the threaded holes.

[0012] As a further improvement of the above technical solution, two parallel guide rails are arranged on the mounting plate, and a sliding block is arranged at the bottom of the first support and the second support, and the sliding block is slidably connected with the guide rails.

[0013] As a further improvement of the above technical solution, limit columns are arranged at the two ends of the guide rail respectively, and the two limit columns are used for limiting the movement stroke of the sliding block.

[0014] As a further improvement of the above technical solution, a home positioning assembly is further arranged, the home positioning assembly comprises a photoelectric sensor and a photoelectric sensing sheet, the photoelectric sensor is fixed on the mounting plate, and the photoelectric sensing sheet is arranged on the first support; when starting, the driving assembly drives the first support to move to a working station, and the first support drives the photoelectric sensing sheet to approach the photoelectric sensor and trigger a home signal.

[0015] As a further improvement of the above technical solution, the sensing end of the photoelectric sensor is provided with a U-shaped sensing groove, and the photoelectric sensing sheet can be embedded in the U-shaped sensing groove; when the first support moves to the working station, the photoelectric sensing sheet is embedded in the U-shaped sensing groove and triggers the home signal.

[0016] The utility model discloses a zoom lens switching device, through setting up driving assembly, driving assembly includes motor, driving pulley, pivot, driven pulley and belt, when switching zoom lens, start motor, and motor drives driving pulley rotation, through the friction or meshing force between belt and driving pulley and driven pulley, power transmission to driven pulley, and pivot synchronous rotation with driven pulley, make belt in closed loop path circulation, and belt drives first support and second support move along opposite direction, and then drive first zoom lens and second zoom lens alternate switching between working station and standby station, thereby, can realize the quick switching of different zoom lens, need not manual replacement, save manual cost, improve detection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model is further illustrated below in combination with the drawings and examples.

[0018] Figure 1 is the structural schematic view of an example provided by the utility model;

[0019] Figure 2 is Figure 1 the structural schematic view of another view of

[0020] Figure 3 is Figure 1 the plan view of

[0021] Reference signs: 1 - mounting plate, 2 - first support, 3 - second support, 4 - first zoom lens, 5 - second zoom lens, 6 - drive assembly, 61 - motor, 62 - driving pulley, 63 - rotating shaft, 64 - driven pulley, 65 - belt, 66 - compression plate, 71 - guide rail, 72 - sliding block, 73 - limiting column, 8 - origin positioning assembly, 81 - photoelectric sensor, 82 - photoelectric sensor sheet. DETAILED DESCRIPTION

[0022] The concept, specific structure and generated technical effects of the utility model will be clearly and completely described below in combination with examples and drawings, so that the purpose, features and effects of the utility model can be fully understood. Obviously, the described examples are only a part of the examples of the utility model, not all examples, based on the examples of the utility model, other examples obtained by the person skilled in the art without creative labor are all within the protection scope of the utility model. In addition, all the coupling / connection relations involved in the patent are not single direct connection of components, but can be composed of better coupling structure by adding or reducing coupling auxiliary components according to the specific implementation situation. The various technical features in the creation of the utility model can be interactively combined under the premise of no mutual contradiction and conflict.

[0023] With reference to Figures 1 to 3 , an example of the utility model provides a zoom lens switching device, which comprises a mounting plate 1, a first support 2, a second support 3, a first zoom lens 4, a second zoom lens 5 and a drive assembly 6, the first support 2 and the second support 3 are movably arranged on the mounting plate 1, the first zoom lens 4 is installed on the first support 2, the second zoom lens 5 is installed on the second support 3, and the drive assembly 6 is used for driving the first support 2 and the second support 3 to move along a preset track, so as to drive the first zoom lens 4 and the second zoom lens 5 to alternately switch between a working station and a standby station, so that the quick switching of different zoom lenses can be realized, manual replacement is not needed, labor cost is saved, and detection efficiency is improved.

[0024] It should be noted that when the first variable magnification lens 4 is located at the working station, the second variable magnification lens 5 is located at the standby station; when the second variable magnification lens 5 is switched to the working station, the first variable magnification lens 4 is located at the standby station.

[0025] In some preferred embodiments, the driving assembly 6 comprises a motor 61, a driving pulley 62, a rotating shaft 63, a driven pulley 64 and a belt 65, the driving pulley 62 is fixedly connected to the output shaft of the motor 61, the driven pulley 64 is fixedly connected to the rotating shaft 63, the rotating shaft 63 is rotatably connected to the mounting plate 1, the belt 65 is connected around the driving pulley 62 and the driven pulley 64 to form a closed-loop transmission structure, and the first support 2 and the second support 3 are both fixedly connected to the belt 65 by fasteners.

[0026] Further, the diameters of the driving pulley 62 and the driven pulley 64 are the same, so that the two sides of the belt 65 are parallel to each other.

[0027] Further, the first support 2 and the second support 3 are located at opposite sides of the belt 65 respectively, when the belt 65 rotates in the closed-loop path, the first support 2 and the second support 3 are driven to move in opposite directions, so as to ensure that the first support 2 and the second support 3 are alternately switched between different stations.

[0028] It can be understood that when the variable magnification lens is switched, the motor 61 is started, the motor 61 drives the driving pulley 62 to rotate, and the power is transmitted to the driven pulley 64 through the friction or meshing force between the belt 65 and the driving pulley 62 and the driven pulley 64, the rotating shaft 63 rotates synchronously with the driven pulley 64, the belt 65 moves in the closed-loop path, and the first support 2 and the second support 3 are driven to move in opposite directions, thereby driving the first variable magnification lens 4 and the second variable magnification lens 5 to be alternately switched between the working station and the standby station.

[0029] Specifically, the inner side of the belt 65 is provided with a first tooth profile, the outer periphery of the driving pulley 62 and the driven pulley 64 is provided with a second tooth profile, and the first tooth profile is engaged with the second tooth profile, so that the belt 65 can be prevented from slipping with the driving pulley 62 or the driven pulley 64, synchronous transmission is ensured, and transmission accuracy is ensured.

[0030] In some preferred embodiments, the fastener comprises a pressing plate 66 and two bolts (not shown in the figure), the pressing plate 66 is provided with two through holes, the distance between the two through holes is greater than the width of the belt 65, the diameter of the through hole is greater than the diameter of the rod part of the bolt and less than the diameter of the head part of the bolt, the side of the first support 2 and the second support 3 close to the belt 65 is provided with two threaded holes, the two threaded holes correspond to the two through holes respectively, and the bolt is threadedly connected with the threaded hole.

[0031] It can be understood that when the first support 2 or the second support 3 is connected with the belt 65, the belt 65 is located between the pressing plate 66 and the first support 2 or the second support 3, the rod portions of the two bolts pass through the two through holes respectively and are screwed on the corresponding threaded holes, so that the pressing plate 66 presses the belt 65 on one side of the first support 2 or the second support 3. At this time, the contact area between the pressing plate 66 and the belt 65 is large, so that the belt 65 can be uniformly stressed, the damage to the belt 65 is reduced, and the installation and disassembly are facilitated, and the convenience of equipment maintenance is improved.

[0032] In some preferred embodiments, two parallel guide rails 71 are arranged on the mounting plate 1, and the bottoms of the first support 2 and the second support 3 are respectively provided with sliding blocks 72 which are in sliding connection with the guide rails 71. When the driving assembly 6 drives the first support 2 and the second support 3 to move synchronously, the first support 2 drives the corresponding sliding block 72 to slide along one of the guide rails 71, and the second support 3 drives the corresponding sliding block 72 to slide in the opposite direction along the other guide rail 71. Thus, the accuracy of the movement of the first support 2 and the second support 3 can be ensured, and the accurate switching of the first zoom lens 4 and the second zoom lens 5 between the working station and the standby station can be ensured.

[0033] Further, the two ends of the guide rail 71 are respectively provided with limiting posts 73, and the two limiting posts 73 are used to limit the movement stroke of the sliding block 72, so that the sliding block 72 can only slide on the corresponding guide rail 71, and the sliding block 72 is prevented from disengaging from the guide rail 71.

[0034] In some preferred embodiments, a home positioning assembly 8 is further included, the home positioning assembly 8 includes a photoelectric sensor 81 and a photoelectric sensing sheet 82, the photoelectric sensor 81 is fixed on the mounting plate 1, and the photoelectric sensing sheet 82 is arranged on the first support 2. When starting, the driving assembly 6 drives the first support 2 to move to the working station, and the first support 2 drives the photoelectric sensing sheet 82 to approach the photoelectric sensor 81 and trigger the in-place signal. Thus, the first support 2 and the first zoom lens 4 can be located on the working station, and the second support 3 and the second zoom lens 5 can be located on the standby station each time the machine is started. Thus, the positions of the first zoom lens 4 and the second zoom lens 5 can be automatically calibrated each time the machine is started, and frequent adjustment is not needed, so that the reliability of the equipment is improved.

[0035] Further, the sensing end of the photoelectric sensor 81 is provided with a U-shaped sensing groove, and the U-shaped sensing groove can accommodate the photoelectric sensing sheet 82 to be embedded. When the first support 2 moves to the working station, the photoelectric sensing sheet 82 is embedded in the U-shaped sensing groove and triggers the in-place signal. Thus, non-contact sensing can be realized, wear is reduced, and the service life is improved. At the same time, the U-shaped sensing groove can avoid false triggering caused by external light, and the stability of the equipment is ensured.

[0036] The above is a specific description of the preferred embodiment of the present application, but the present application is not limited to the described embodiment, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A variable magnification lens switching device characterized by comprising: The application relates to a zoom lens drive assembly, which comprises a mounting plate, a first support, a second support, a first zoom lens, a second zoom lens and a driving assembly, the first support and the second support are movably arranged on the mounting plate, the first zoom lens is arranged on the first support, the second zoom lens is arranged on the second support, and the driving assembly is used for driving the first support and the second support to move along a preset track, so as to drive the first zoom lens and the second zoom lens to alternately switch between a working position and a standby position.

2. A variable magnification lens switching apparatus according to claim 1, wherein The driving assembly comprises a motor, a driving pulley, a rotating shaft, a driven pulley and a belt, the driving pulley is fixedly connected to an output shaft of the motor, the driven pulley is fixedly connected to the rotating shaft, the rotating shaft is rotationally connected to the mounting plate, and the belt is connected around the driving pulley and the driven pulley to form a closed-loop transmission structure, and the first support and the second support are fixedly connected to the belt through fasteners.

3. A variable magnification lens switching apparatus according to claim 2, wherein The driving pulley and the driven pulley have the same diameter.

4. A variable magnification lens switching apparatus according to claim 3, wherein The first support and the second support are located on opposite sides of the belt.

5. A variable magnification lens switching apparatus according to claim 2, wherein The inner side of the belt is provided with a first tooth profile, the outer periphery of the driving pulley and the driven pulley is provided with a second tooth profile, and the first tooth profile is engaged with the second tooth profile.

6. A variable magnification lens switching apparatus according to claim 2, wherein The fastener comprises a pressing plate and two bolts, two through holes are arranged on the pressing plate, the distance between the two through holes is greater than the width of the belt, the diameter of the through holes is greater than the diameter of the rod part of the bolts and smaller than the diameter of the head part of the bolts, the side of the first support and the second support close to the belt is provided with two threaded holes, the two threaded holes correspond to the two through holes respectively, and the bolts are threadedly connected with the threaded holes.

7. A variable magnification lens switching apparatus according to claim 4, wherein Two parallel guide rails are arranged on the mounting plate, and the bottom of the first support and the second support is provided with a sliding block, and the sliding block is slidingly connected with the guide rails.

8. A variable power lens switching device according to claim 7, wherein Two limiting columns are arranged at the two ends of the guide rails respectively, and the limiting columns are used for limiting the movement stroke of the sliding block.

9. The variable magnification lens switching apparatus according to claim 1, wherein The application further comprises an original point positioning assembly, the original point positioning assembly comprises a photoelectric sensor and a photoelectric sensing sheet, the photoelectric sensor is fixed on the mounting plate, and the photoelectric sensing sheet is arranged on the first support; when starting, the driving assembly drives the first support to move to the working position, and the first support drives the photoelectric sensing sheet to approach the photoelectric sensor and triggers an in-position signal.

10. A variable power lens switching device according to claim 9, wherein The sensing end of the photoelectric sensor is provided with a U-shaped sensing groove, the U-shaped sensing groove can accommodate the photoelectric sensing sheet to be embedded, when the first support moves to the working position, the photoelectric sensing sheet is embedded in the U-shaped sensing groove and triggers an in-position signal.

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