Unidirectional rotation system of microscope electric objective lens turntable

Abstract

The invention provides a unidirectional rotating system of a microscope electric objective lens rotating disc, which comprises a speed reducing motor, an output shaft of the speed reducing motor is connected with a ratchet wheel, the ratchet wheel is in transmission connection with a pawl, the pawl is connected with a pinion, the pinion is in transmission connection with a bull gear, and the bull gear is connected with an objective lens disc. The system effectively solves the problem that when an existing electric microscope on the market is used for observing a microscopic sample, continuous objective lens switching of different multiples cannot be manually achieved.

Description

Technical Field

[0001] The invention relates to the technical field of laboratory instruments and equipment, and in particular to a one-way rotation system of an electric objective turntable of a microscope. Background Art

[0002] The electric objective turret of a microscope generally uses a reduction motor to drive a small gear to rotate, and the small gear drives the large gear on the objective disk to rotate, thereby achieving the purpose of changing objectives of different magnifications. This structure cannot manually rotate the objective disk due to the resistance of the reduction motor when there is no electric or manual rotation of the objective turret, so as to achieve the purpose of manually switching the objective lens. Summary of the invention

[0003] In view of the above problems, the present invention provides a one-way rotation system of a motorized objective turret of a microscope, which effectively solves the problem that the existing motorized microscopes on the market cannot manually switch between objective lenses of different magnifications when observing microscopic samples.

[0004] A one-way rotation system of a microscope electric objective turntable comprises a reduction motor, wherein the output shaft of the reduction motor is connected to a ratchet, the ratchet is transmission-connected to a pawl, the pawl is connected to a small gear, the small gear is transmission-connected to a large gear, and the large gear is connected to an objective disk.

[0005] Preferably, there are multiple ratchets, and the multiple ratchets are evenly distributed along the circumference of the pinion gear with the axis of the pinion gear as the center.

[0006] Preferably, the pawl is mounted on the upper end surface of the pinion gear.

[0007] Preferably, the pinion is rotatably connected to the microscope housing.

[0008] Preferably, the pinion is coaxially sleeved on the outside of the ratchet.

[0009] Compared with the prior art, the present invention has the following beneficial effects: The reduction motor drives the ratchet structure with a pinion to rotate, and drives the objective lens disk to rotate through the transmission of the ratchet pawl and the transmission between the two gears. At the same time, when the objective lens disk is manually rotated, due to the one-way driving characteristics of the ratchet, the pinion drives the pawl to slide along the ratchet, and will not be affected by the resistance of the reduction motor, so the objective lens can be easily switched manually. It not only realizes the function of the motor driving the objective lens, but also achieves the purpose of manually switching the objective lens. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ; Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ; In the figure: 1. reduction motor, 2. ratchet, 3. small gear, 4. pawl, 5. large gear. DETAILED DESCRIPTION

[0010] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0011] See also Figure 1 - Figure 2 The present invention provides a one-way rotation system for a microscope electric objective turntable. The system changes the direct meshing transmission of two gears in the gear transmission system in the prior art into an indirect transmission system connected by a ratchet 2 and a pawl 4, and utilizes the one-way transmission characteristics of the ratchet to release the resistance of the reduction motor, thereby realizing continuous switching of the objective lens in manual mode.

[0012] The system includes a reduction motor 1, a ratchet 2 is coaxially connected to the output shaft of the reduction motor 1, a pinion 3 is coaxially mounted on the outside of the ratchet, and the pinion 3 is rotatably connected to the housing of the microscope. A plurality of ratchets 4 are detachably connected to the upper end surface of the pinion 3 by screws, and the ratchets 4 are evenly distributed along the circumference of the pinion with the pinion axis as the center. The pinion 3 is transmission-connected to a large gear 5, and the large gear is connected to the objective lens disk.

[0013] The ratchet 2 located in the center is connected to the reduction motor 1. When the reduction motor 1 drives the ratchet 2 to rotate clockwise, the pawl slides along the edge of the ratchet teeth, and the ratchet 2 can rotate freely relative to the peripheral pinion. When the reduction motor 1 drives the ratchet 2 to rotate counterclockwise, the ratchet teeth on the ratchet 2 are locked with the pawl 4, and the transmission action of the pawl drives the peripheral small gear 3 to rotate counterclockwise. Since the small gear 3 is meshed with the large gear 5, the large gear 5 and the objective lens disk are driven to rotate clockwise.

[0014] When the power is off, manually rotate the objective lens disk and the large gear 5 clockwise. Through meshing transmission, driven by the large gear 5, the small gear 3 rotates counterclockwise, the pawl 4 slides along the ratchet teeth on the surface of the ratchet wheel 2, and the small gear 3 rotates without resistance, so the objective lens disk can rotate normally. Through the above three actions, the objective lens disk can be electrically driven to rotate clockwise, and can also rotate normally when the objective lens disk is manually turned clockwise. While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A one-way rotation system of a microscope electric objective turret, characterized in that: The invention comprises a reduction motor (1), wherein the output shaft of the reduction motor is connected to a ratchet (2), the ratchet is drivingly connected to a pawl (4), the pawl is connected to a small gear (3), the small gear is drivingly connected to a large gear (5), and the large gear is connected to an objective lens disk.

2. The one-way rotation system of the electric objective turret of a microscope according to claim 1, characterized in that: There are a plurality of ratchet pawls (4), and the plurality of ratchet pawls are evenly distributed along the circumference of the pinion gear (3) with the axis of the pinion gear (3) as the center.

3. The one-way rotation system of a microscope electric objective turret according to claim 1, characterized in that: The pawl (4) is mounted on the upper end surface of the pinion gear (3).

4. The one-way rotation system of a microscope electric objective turret according to claim 1, characterized in that: The pinion (3) is rotatably connected to the microscope housing.

5. The one-way rotation system of the electric objective turret of a microscope according to claim 1, characterized in that: The pinion (3) is coaxially sleeved on the outside of the ratchet (2).

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