Microscope objective lens switching device

Abstract

The utility model provides a microscope objective lens switching device, which is used for switching an objective lens of a microscope and comprises a rotary table base, a disc surface rotationally connected with the rotary table base, a driving assembly for providing driving force and a transmission assembly for transmitting the driving force to the disc surface to enable the disc surface to rotate, the transmission assembly comprises a worm, a worm gear meshed and matched with the worm and a roller bearing assembly for connecting the worm gear and the rotary table base, the microscope objective lens switching device further comprises balls clamped at the circumference of the disc surface and the circumference of the rotary table base, and the roller bearing assembly comprises an outer bearing connected with the rotary table base, an inner bearing connected with the worm gear and a roller. According to the microscope objective lens switching device, the outer ring is supported by the balls to rotate, and the inner ring is supported by the roller bearing assembly to rotate, so that the precision and rigidity of the bearing assembly are higher, the precision of the microscope objective lens switching device is higher, the processing requirement on a processing piece of the microscope objective lens switching device is lower, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of microscopes, in particular to a microscope objective switching device.

Background Art

[0002] A microscope has a very considerable magnification function. It usually includes multiple eyepieces and multiple objectives, and different combinations are switched according to different needs to achieve different magnification multiples. Due to the very large magnification, a tiny deviation will cause a huge shift in imaging. At this time, a high-precision objective switching device is required. In the related prior art, there is a structure in which a layer of balls is used between the supporting disk surface of the objective switching device and the base to support the rotation of the disk surface relative to the base. However, this structure has a great influence on the position accuracy of the microscope objective turntable base. Therefore, the requirements for the materials and processing of the turntable base and the disk surface are very high, the cost is relatively high, and the performance of the finished product of the microscope objective switching device is also poor.

[0003] Therefore, it is necessary to provide a new microscope objective switching device to solve the above technical problems.

Summary of the Utility Model

[0004] The purpose of the utility model is to provide a microscope objective switching device to meet the requirements of high precision and cost reduction.

[0005] To achieve the above purpose, the utility model provides a microscope objective switching device for switching the objectives of a microscope. The microscope objective switching device includes a turntable base, a disk surface rotatably connected to the turntable base, a driving component providing driving force, and a transmission component transmitting the driving force to the disk surface to make the disk surface rotate relative to the turntable base. The transmission component includes a worm connected to the driving component, a worm gear meshing with the worm, and a roller bearing component connecting the worm gear and the turntable base. The microscope objective switching device further includes a plurality of balls clamped between the circumferences of the disk surface and the turntable base. The roller bearing component includes an outer bearing connected to the turntable base, an inner bearing connected to the worm gear, and a plurality of rollers arranged between the outer bearing and the inner bearing.

[0006] Preferably, the rollers are cylindrical.

[0007] Preferably, the rollers include first rollers arranged along the circumference and second rollers arranged between two adjacent first rollers. The extending direction of the axis of the first roller is the tangent direction of the circumference, and the extending direction of the axis of the second roller is perpendicular to the extending direction of the axis of the first roller.

[0008] Preferably, the included angle between the axis of the second roller and the plane where the circumference is located ranges from greater than 0° to less than 90°.

[0009] Preferably, the outer bearing is an annular structure, the outer bearing includes a first annular surface opposite to the inner bearing, the first annular surface is provided with a first receiving groove, the inner bearing is an annular structure, the inner bearing includes a second annular surface opposite to the outer bearing, the second annular surface is provided with a second receiving groove, the first receiving groove and the second receiving groove form a receiving groove for receiving the roller, and the cross-section of the receiving groove is square.

[0010] Preferably, the transmission assembly further includes a transition stud connecting the worm gear and the disk surface, and the transition stud transmits the driving force to the disk surface to drive the disk surface to rotate.

[0011] Preferably, the transmission assembly further includes a bearing post disposed in the worm gear and partially extending into the roller bearing assembly.

[0012] Preferably, the microscope objective switching device further includes a cover covering the transition stud, and the surface of the cover is flush with the surface of the disk surface.

[0013] Preferably, the turntable base includes a first receiving portion located at the middle position of the turntable base for receiving part of the transmission assembly, and a second receiving portion located on one side of the first receiving portion for receiving the driving assembly and part of the transmission assembly.

[0014] Preferably, a light passing hole is provided on one side of the turntable base opposite to the second receiving portion.

[0015] Compared with the related art, the present utility model provides a microscope objective lens switching device. The microscope objective lens switching device is used to switch the objective lens of a microscope. The microscope objective lens switching device includes a turntable base, a disk surface rotatably connected to the turntable base, a driving component for providing driving force, and a transmission component for transmitting the driving force to the disk surface to make the disk surface rotate relative to the turntable base. The transmission component includes a worm connected to the driving component, a worm gear meshing with the worm, and a roller bearing component connecting the worm gear and the turntable base. The microscope objective lens switching device further includes a number of ball bearings clamped at the circumferences of the disk surface and the turntable base. The roller bearing component includes an outer bearing connected to the turntable base, an inner bearing connected to the worm gear, and a number of rollers arranged between the outer bearing and the inner bearing. In the microscope objective lens switching device of the present utility model, the outer ring uses ball bearings to support the rotation of the disk surface relative to the turntable base, and the inner ring uses a roller bearing component to support the rotation of the disk surface relative to the turntable base, so that the accuracy and rigidity of the roller bearing component are higher, the accuracy of the microscope objective lens switching device is also higher, the processing requirements for the processed parts of the microscope objective lens switching device are lower, and the cost is also reduced.

Description of the Drawings

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the microscope objective lens switching device of the present utility model.

[0017] Figure 2 As shown in Figure 1 is a partial exploded view of the microscope objective lens switching device shown.

[0018] Figure 3 As shown in Figure 1 is another partial exploded view of the microscope objective lens switching device shown.

[0019] Figure 4 As shown in Figure 1 is a partial exploded view of some components of the microscope objective lens switching device shown.

[0020] Figure 5 Is a cross-sectional view along the A-A line in Figure 1 shown.

Detailed Embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] As shown in Figures 1 to 5As shown in the figure, the present utility model provides a microscope objective switching device 100 for switching the objectives of a microscope. The microscope objective switching device 100 includes a turntable base 1, a disk surface 2 rotatably connected to the turntable base 1, a driving component 3 for providing driving force, a transmission component 4 for transmitting the driving force to the disk surface 2 to make the disk surface 2 rotate relative to the turntable base 1, a ball 5 disposed between the turntable base 1 and the disk surface 2, a housing 6 that cooperates with the turntable base 1 to accommodate the driving component 3 and the transmission component 4, a manual knob 7 extending out of the turntable base 1, and a cover body 8.

[0023] The turntable base 1 is used to connect the eyepiece system of the microscope, and the driving component 3 is fixed on the turntable base 1. The turntable base 1 includes a first receiving portion 11 located at the middle position of the turntable base 1 for receiving part of the transmission component 4, a second receiving portion 12 located on one side of the first receiving portion 11 for receiving the driving component 3 and part of the transmission component 4. A light passing hole 13 is provided on one side of the turntable base 1 opposite to the second receiving portion 12. The turntable base 1 includes a top wall 14 and an extending wall 15 extending from the top wall 14 towards the disk surface 2. The turntable base 1 is provided with a first groove 16 along its circumference.

[0024] The disk surface 2 is a ring-shaped flat structure. The disk surface 2 is provided with a plurality of connection holes 21 for connecting the objectives. In this embodiment, there are five connection holes 21, and other numbers can also be set according to actual needs, such as three, four, etc. The disk surface 2 is provided with a second groove 22 along its circumference. The first groove 16 of the turntable base 1 and the second groove 22 of the disk surface 2 form a groove for receiving the ball 5.

[0025] In this embodiment, the driving component 3 is a stepping motor. During operation, the driving component 3 drives the disk surface 2 to rotate relative to the turntable base 1 through the transmission component 4, and the disk surface 2 drives the objective to rotate to achieve the purpose of switching the objective.

[0026] The transmission component 4 includes a worm 41 connected to the driving component 3, a worm gear 42 meshing with the worm 41, a roller bearing assembly 43 connecting the worm gear 42 and the turntable base 1, a bearing column 44 disposed in the roller bearing assembly 43, and a transition stud 45 connecting the worm gear 42 and the disk surface 2. The transition stud 45 transmits the driving force to the disk surface 2 to drive the disk surface 2 to rotate.

[0027] The worm 41 is provided with threads, and the worm gear 42 is provided with meshing teeth. The threads are engaged with the meshing teeth. The driving assembly 3 rotates to drive the worm 41 to rotate. The worm 41 drives the worm gear 42 to rotate, and finally drives the disk surface 2 to rotate through the transition stud 45.

[0028] The roller bearing assembly 43 includes an outer bearing 431 connected to the turntable base 1, an inner bearing 432 connected to the worm gear 42, and a plurality of rollers 433 disposed between the outer bearing 431 and the inner bearing 432. The rollers 433 are cylindrical. The outer bearing 431 is fixedly connected to the extending wall 15 of the turntable base 1, and the inner bearing 432 is fixedly connected to the worm gear 42 and the bearing column 44.

[0029] The rollers 433 include first rollers 4331 arranged in a circumference and second rollers 4332 disposed between two adjacent first rollers 4331. The extending direction of the axis of the first rollers 4331 is the tangential direction of the circumference, and the extending direction of the axis of the second rollers 4332 is perpendicular to the extending direction of the axis of the first rollers 4331. The range of the angle B between the axis of the second rollers 4332 and the plane where the circumference is located is greater than 0° and less than 90°. The outer bearing 431 is of an annular structure. The outer bearing 431 includes a first annular surface 4311 opposite to the inner bearing 432, and the first annular surface 4311 is provided with a first receiving groove 4312. The inner bearing 432 is of an annular structure. The inner bearing 432 includes a second annular surface 4321 opposite to the outer bearing 431, and the second annular surface 4321 is provided with a second receiving groove 4322. The first receiving groove 4312 and the second receiving groove 4322 form a receiving groove 434 for receiving the rollers, and the cross-section of the receiving groove 434 is square.

[0030] The first rollers 4331 and the second rollers 4332 form a crossed roller structure, so that the accuracy and rigidity of the roller bearing assembly 43 are higher, so that the accuracy of the microscope objective switching device 100 is higher, the processing requirements for the workpieces of the microscope objective switching device 100 are lower, and the cost is also reduced.

[0031] The bearing column 44 extends from the inside of the worm gear 42 into the roller bearing assembly 43, so that the worm gear 42 and the roller bearing assembly 43 can be accurately positioned and connected, and the bearing column 44 rotates together with the worm gear 42 and the inner bearing 432.

[0032] The balls 5 are clamped between the circumferences of the disk surface 2 and the turntable base 1, so that the disk surface 2 and the turntable base 1 form a support in the vertical direction. The balls 5 are arranged in a circle, and adjacent balls 5 are abutted against each other.

[0033] The housing 6 is made of metal material, and the housing 6 cooperates with the turntable base 1 to accommodate other components.

[0034] The manual knob 7 is threadedly connected to one end of the worm 41 away from the drive assembly 3. Through the arrangement of the manual knob 7, the flexibility of the microscope objective lens switching device can be further improved.

[0035] The cover body 8 covers the transition stud 45, the surface of the cover body 8 is flush with the surface of the disk surface 2, and the cover body 8 rotates together with the disk surface 2.

[0036] Compared with the related art, a microscope objective lens switching device provided by the present utility model is used to switch the objective lens of a microscope. The microscope objective lens switching device includes a turntable base, a disk surface rotatably connected to the turntable base, a drive assembly for providing driving force, and a transmission assembly for transmitting the driving force to the disk surface so that the disk surface rotates relative to the turntable base. The transmission assembly includes a worm connected to the drive assembly, a worm gear meshing with the worm, and a roller bearing assembly connecting the worm gear and the turntable base. The microscope objective lens switching device further includes a plurality of balls clamped at the circumferences of the disk surface and the turntable base. The roller bearing assembly includes an outer bearing connected to the turntable base, an inner bearing connected to the worm gear, and a plurality of rollers disposed between the outer bearing and the inner bearing. The microscope objective lens switching device of the present utility model uses balls to support the rotation of the disk surface relative to the turntable base on the outer ring, and uses a roller bearing assembly to support the rotation of the disk surface relative to the turntable base on the inner ring, so that the accuracy and rigidity of the roller bearing assembly are higher, the accuracy of the microscope objective lens switching device is also higher, and the processing requirements for the processed parts of the microscope objective lens switching device are lower.

[0037] The above are only the embodiments of the present utility model. It should be noted here that for those of ordinary skill in the art, without departing from the creative concept of the present utility model, improvements can still be made, but these all belong to the protection scope of the present utility model.

Claims

1. A microscope objective lens switching device for switching the objective lens of a microscope, characterized in that: The microscope objective switching device includes a turntable base, a disk rotatably connected to the turntable base, a driving component that provides driving force, and a transmission component that transmits the driving force to the disk so that the disk rotates relative to the turntable base. The transmission component includes a worm connected to the driving component, a worm wheel engaged with the worm, and a roller bearing component connecting the worm wheel and the turntable base. The microscope objective switching device also includes a plurality of balls clamped at the circumference of the disk and the circumference of the turntable base. The roller bearing assembly includes an outer bearing connected to the turntable base, an inner bearing connected to the worm wheel, and a plurality of rollers arranged between the outer bearing and the inner bearing.

2. The microscope objective lens switching device according to claim 1, wherein: The roller is cylindrical.

3. The microscope objective lens switching device according to claim 2, wherein The rollers include first rollers arranged along a circumference and second rollers arranged between two adjacent first rollers. The axis of the first rollers extends in a tangential direction of the circumference, and the axis of the second rollers extends in a direction perpendicular to that of the first rollers.

4. The microscope objective lens switching device according to claim 3, characterized in that: The angle between the axis of the second roller and the plane where the circumference is located is greater than 0° and less than 90°.

5. The microscope objective lens switching device according to claim 4, characterized in that: The outer bearing is an annular structure, and the outer bearing includes a first annular surface opposite to the inner bearing, and the first annular surface is provided with a first receiving groove. The inner bearing is an annular structure, and the inner bearing includes a second annular surface opposite to the outer bearing, and the second annular surface is provided with a second receiving groove. The first receiving groove and the second receiving groove form a receiving groove for accommodating the roller, and the cross-section of the receiving groove is square.

6. The microscope objective lens switching device according to claim 1, characterized in that, The transmission assembly further includes a transition stud connecting the worm gear and the disc, wherein the transition stud transmits the driving force to the disc to drive the disc to rotate.

7. The microscope objective lens switching device according to claim 6, characterized in that: The transmission assembly also includes a bearing column disposed within the worm gear and extending partially into the roller bearing assembly.

8. The microscope objective lens switching device according to claim 6, wherein: The microscope objective lens switching device further includes a cover body covering the transition stud, and a surface of the cover body is flush with a surface of the disk surface.

9. The microscope objective lens switching device according to claim 1, wherein The turntable base includes a first receiving portion located at a middle position of the turntable base for receiving part of the transmission assembly, and a second receiving portion located on one side of the first receiving portion for receiving the drive assembly and part of the transmission assembly.

10. The microscope objective lens switching device according to claim 9, wherein, A light-through hole is provided on a side of the turntable base opposite to the second receiving portion.

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