Microscope objective switching apparatus

Abstract

A microscope objective switching apparatus (100) for switching an objective of a microscope. The microscope objective switching apparatus (100) comprises a turntable base (1), a disk (2) rotatably connected to the turntable base (1), a driving assembly (3) for providing a driving force, and a transmission assembly (4) for transmitting the driving force to the disk (2) to rotate the disk (2). The transmission assembly (4) comprises a worm (41), a worm wheel (42) meshing with the worm (41), and a roller bearing assembly (43) connecting the worm wheel (42) to the turntable base (1). The microscope objective switching apparatus (100) further comprises balls (5) clamped at the periphery of the disk (2) and the periphery of the turntable base (1). The roller bearing assembly (43) comprises an outer bearing (431) connected to the turntable base (1), an inner bearing (432) connected to the worm wheel (42), and rollers (433). The microscope objective switching apparatus (100) uses the balls (5) to support rotation on the outer ring, and uses the roller bearing assembly (43) to support rotation on the inner ring, thereby improving the precision and rigidity of the bearing assembly (43), enhancing the precision of the microscope objective switching apparatus (100), and lowering the processing requirements for workpieces of the microscope objective switching apparatus (100).

Description

Microscope objective switching device TECHNICAL FIELD

[0001] The utility model relates to microscope technical field especially relates to a microscope objective switching device. BACKGROUND

[0002] Microscope has very considerable magnification function, it usually includes a plurality of eyepiece and a plurality of objective, according to different needs to switch different combination to realize different magnification. Because magnification is very big, tiny deviation will cause the huge deviation of imaging, at this moment need a kind of high-precision objective switching device. In the related prior art, the structure that one layer of ball is used to support the rotation of the disc surface relative to the base between objective switching device support disc surface and base, however, the position accuracy of the structure is greatly influenced on the position accuracy of the microscope objective turntable base, so the material and processing requirements of the turntable base and the disc surface are very high, the cost is also relatively high, and the performance of the microscope objective switching device product is also poor. TECHNICAL PROBLEM

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

[0004] The utility model discloses a microscope objective switching device to meet the requirement of high accuracy and reduce cost.

[0005] In order to achieve the above object, the utility model provides a kind of microscope objective switching device for switching the objective of microscope, the microscope objective switching device includes turntable base, the disc surface rotationally connected with the turntable base, the driving assembly for providing driving force and the transmission assembly for transmitting the driving force to the disc surface so that disc surface rotates relative to the turntable base, the transmission assembly includes the worm connected with the driving assembly, the worm gear meshing with the worm and the roller bearing assembly connecting the worm gear with the turntable base, the microscope objective switching device further includes the several balls clamped at the circumference of the disc surface and the circumference of the turntable base, the roller bearing assembly includes the outer bearing connected with the turntable base, the inner bearing connected with the worm gear and the several rollers arranged between the outer bearing and the inner bearing.

[0006] Preferably, the roller is cylindrical.

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

[0008] Preferably, the angle between the axis of the second roller and the plane in which the circumference lies is greater than 0° and less than 90°.

[0009] Preferably, the outer bearing is a ring structure, the outer bearing comprises a first annular surface opposite to the inner bearing, the first annular surface is provided with a first receiving groove, the inner bearing is a ring structure, the inner bearing comprises 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 a square.

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

[0011] Preferably, the transmission assembly further comprises a bearing stud arranged in the worm gear and partially extending into the roller bearing assembly.

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

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

[0014] Preferably, the turntable base is provided with a light hole at the side opposite to the second receiving portion. Advantages

[0015] Compared with the related art, the microscope objective lens switching device provided by the utility model, the microscope objective lens switching device is used for switching the objective lens of a microscope, the microscope objective lens switching device comprises a turntable base, a disc surface rotationally connected with the turntable 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 relative to the turntable base, the transmission assembly comprises a worm connected with the driving assembly, a worm wheel meshed with the worm, and a roller bearing assembly connecting the worm wheel with the turntable base, the microscope objective lens switching device further comprises a plurality of balls clamped at the periphery of the disc surface and the periphery of the turntable base, the roller bearing assembly comprises an outer bearing connected with the turntable base, an inner bearing connected with the worm wheel, and a plurality of rollers arranged between the outer bearing and the inner bearing, the microscope objective lens switching device of the utility model uses balls to support the disc surface to rotate relative to the turntable base through the outer ring, uses the roller bearing assembly to support the disc surface to rotate relative to the turntable base through the inner ring, so that the precision and rigidity of the roller bearing assembly are higher, the precision of the microscope objective lens switching device is also higher, the machining requirement of the machining piece of the microscope objective lens switching device is lower, and the cost is also reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a perspective view of the microscope objective lens switching device of the utility model.

[0017] Fig. 2 is a partially exploded view of the microscope objective lens switching device shown in Fig. 1.

[0018] Fig. 3 is another partially exploded view of the microscope objective lens switching device shown in Fig. 1.

[0019] Fig. 4 is an exploded view of part of the components of the microscope objective lens switching device shown in Fig. 1.

[0020] Fig. 5 is a sectional view along line A-A in Fig. 1. BEST MODE FOR CARRYING OUT THE INVENTION

[0021] The technical solutions in the embodiments of the utility model will be apparently and completely described in combination with the drawings of the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] As shown in FIG. 1 to FIG. 5, the utility model provides a microscope objective lens switching device 100 for switching the objective lens of microscope, the microscope objective lens switching device 100 includes turret base 1, with the turret base 1 rotation connection's disc surface 2, provide driving force drive assembly 3, the transmission of the driving force to the disc surface 2 makes the disc surface 2 relative the turret base 1 rotation transmission assembly 4, be arranged between the turret base 1 with the disc surface 2's ball 5, with the turret base 1 cooperation holds the drive assembly 3 and transmission assembly 4's shell 6, extend the turret base 1's manual knob 7 and cover 8.

[0023] The turret base 1 is used for connecting the ocular system of microscope, and the drive assembly 3 is fixed on the turret base 1.The turret base 1 includes a first receiving portion 11 for receiving part of the transmission assembly 4 at the middle position of the turret base 1, a second receiving portion 12 for receiving the drive assembly 3 and part of the transmission assembly 4 at one side of the first receiving portion 11, and a light hole 13 is arranged at the side opposite to the second receiving portion 12 of the turret base 1.The turret base 1 includes a top wall 14 and an extension wall 15 extending from the top wall 14 to the disc surface 2, and a first groove 16 is arranged along the circumference of the turret base 1.

[0024] The disc surface 2 is annular plate structure, and a plurality of connecting holes 21 are formed in the disc surface 2, which are used for connecting the objective lens.In the embodiment, five connecting holes 21 are arranged, and other numbers such as three or four can also be arranged according to actual needs.A second groove 22 is arranged along the circumference of the disc surface 2, and the first groove 16 of the turret base 1 and the second groove 22 of the disc surface 2 form a groove for receiving the ball 5.

[0025] In the embodiment, the drive assembly 3 is a stepper motor.When working, the drive assembly 3 drives the disc surface 2 to rotate relative to the turret base 1 through the transmission assembly 4, and the disc surface 2 drives the objective lens to rotate to achieve the purpose of switching the objective lens.

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

[0027] The worm 41 is provided with a screw thread, the worm wheel 42 is provided with a meshing tooth, the screw thread cooperates with the meshing tooth, the driving assembly 3 rotates to drive the worm 41 to rotate, the worm 41 drives the worm wheel 42 to rotate, and finally the disc surface 2 is driven to rotate through the transition stud 45.

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

[0029] The rollers 433 include first rollers 4331 arranged along a circumference and second rollers 4332 arranged between adjacent first rollers 4331, the extension direction of the axis of the first roller 4331 is the tangent direction of the circumference, and the extension direction of the axis of the second roller 4332 is perpendicular to the extension direction of the axis of the first roller 4331. The angle B between the axis of the second roller 4332 and the plane in which the circumference lies is greater than 0° and less than 90°. The outer bearing 431 is annular, and includes a first annular surface 4311 opposite the inner bearing 432, and the first annular surface 4311 is provided with a first receiving groove 4312. The inner bearing 432 is annular, and includes a second annular surface 4321 opposite 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 precision and rigidity of the roller bearing assembly 43 are higher, thereby the precision of the microscope objective switching device 100 is higher, the machining requirements for the machining parts 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 wheel 42 to the inside of the roller bearing assembly 43, so that the worm wheel 42 and the roller bearing assembly 43 can be accurately positioned and connected, and the bearing column 44 rotates together with the worm wheel 42 and the inner bearing 432.

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

[0033] The shell 6 is made of metal material, and the shell 6 is matched with the rotary table base 1 to accommodate other components.

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

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

[0036] Compared with the related art, the microscope objective switching device provided by the utility model is used for switching the 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 make the disc surface rotate relative to the rotary table base. The transmission assembly comprises a worm connected with the driving assembly, a worm wheel meshed and matched with the worm, and a roller bearing assembly connecting the worm wheel and the rotary table base. The microscope objective switching device further comprises a plurality of balls clamped at the periphery of the disc surface and the periphery of the rotary table base. The roller bearing assembly comprises an outer bearing connected with the rotary table base, an inner bearing connected with the worm wheel, and a plurality of rollers arranged between the outer bearing and the inner bearing. The microscope objective switching device of the utility model uses balls to support the disc surface to rotate relative to the rotary table base through an outer ring, and uses a roller bearing assembly to support the disc surface to rotate relative to the rotary table base through an inner ring. The precision and rigidity of the roller bearing assembly are higher, and the precision of the microscope objective switching device is also higher. The machining requirement for the machining part of the microscope objective switching device is lower.

[0037] The above only describes the embodiments of the utility model, and it should be noted that those skilled in the art can make improvements without departing from the creative concept of the utility model, but these all belong to the protection scope of the utility model.

Claims

1. A microscope objective switching device for switching an objective of a microscope, characterized in that: The microscope objective switching device comprises a turntable base, a disc surface rotationally connected with the turntable base, a driving assembly for providing driving force, and a transmission assembly for transmitting the driving force to the disc surface to rotate the disc surface relative to the turntable base, the transmission assembly comprises a worm connected with the driving assembly, a worm gear meshing with the worm, and a roller bearing assembly connecting the worm gear with the turntable base, the microscope objective switching device further comprises a plurality of balls clamped at the periphery of the disc surface and the periphery of the turntable base, the roller bearing assembly comprises an outer bearing connected with the turntable base, an inner bearing connected with the worm gear, and a plurality of rollers arranged between the outer bearing and the inner bearing.

2. The microscope objective changer according to claim 1, characterized in that The roller is cylindrical.

3. The microscope objective changer according to claim 2, characterized in that The roller comprises first rollers arranged along the circumference and second rollers arranged between adjacent first rollers, the first rollers have axes extending in the tangential direction of the circumference, and the second rollers have axes extending perpendicularly to the axes of the first rollers.

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

5. The microscope objective changer according to claim 4, characterized in that The outer bearing has a ring structure, the outer bearing comprises a first annular surface opposite the inner bearing, the first annular surface is provided with a first receiving groove, the inner bearing has a ring structure, the inner bearing comprises a second annular surface opposite 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 rollers, and the cross section of the receiving groove is square.

6. The microscope objective changer according to claim 1, characterized in that The transmission assembly further comprises a transition stud connecting the worm gear with the disc surface, the transition stud transmits the driving force to the disc surface to drive the disc surface to rotate.

7. The microscope objective changer according to claim 6, characterized in that The transmission assembly further comprises a bearing column arranged in the worm gear and partially extending into the roller bearing assembly.

8. The microscope objective changer according to claim 6, characterized in that The microscope objective switching device further comprises a cover covering the transition stud, the surface of the cover is flush with the surface of the disc surface.

9. The microscope objective changer according to claim 1, characterized in that The turntable base comprises a first receiving portion receiving part of the transmission assembly at the middle position of the turntable base, and a second receiving portion receiving the driving assembly and part of the transmission assembly at one side of the first receiving portion.

10. The microscope objective changer according to claim 9, characterized in that The side of the turntable base opposite the second receiving portion is provided with a light hole.

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