CN111897120A

CN111897120A - Electric objective lens converter based on electromagnetic positioning

Info

Publication number: CN111897120A
Application number: CN202010939809.6A
Authority: CN
Inventors: 张凡; 陈谦; 郑廷; 徐毅茹; 曾呈
Original assignee: Suzhou Bowen Photoelectric Technology Co ltd
Current assignee: Suzhou Bowen Photoelectric Technology Co ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2020-11-06

Abstract

The invention relates to the field of microscopes, and discloses an electromagnetic positioning-based electric objective lens converter, which comprises a motor, a rotating disc, a fixed frame and an electromagnetic positioning device, wherein the motor is arranged on the rotating disc; a plurality of grooves are formed in the rotating disc; the fixing frame comprises a base, a motor bracket and a shell; the base is provided with an interface used for being arranged on a microscope lens cone; the shell is arranged below the base and connected with the base to form a box body with an opening at one end; the motor bracket is arranged in the box body, and the rotating disc is rotatably arranged at the opening of the box body; the motor is fixed on the motor bracket; the motor is connected with the rotating disc. The electromagnetic positioning device comprises a push-pull electromagnet and a position detection device. The position detection device comprises a plurality of photoelectric sensors and a sensing sheet; a plurality of photoelectric sensors are arranged on the motor bracket; the sensing chip is mounted on the rotating disk. The scheme solves the problems that the repeated positioning precision is not high due to long-term abrasion of a positioner on the electric objective lens converter, and errors can be accumulated for a long time in objective lens conversion.

Description

Electric objective lens converter based on electromagnetic positioning

Technical Field

The invention relates to a microscope objective lens control device, in particular to an electric objective lens converter based on electromagnetic positioning.

Background

The electric objective lens changer in the prior art is provided with a lens hole and a rotating hole, and a positioner is arranged on a machine body corresponding to the position of the objective lens changer and used for mechanically positioning the objective lens changer. For example, the chinese intellectual property office disclosed a hall switch based objective lens control device in 2019, 10/22/h, with the publication number CN110361859A, and its positioner made of a leaf spring, with one end fixed on the body and the other end provided with a spherical contact point which can be pressed against the edge of the objective lens converter. When the device is used, the objective lens converter is provided with the objective lenses with different multiples, and the objective lens converter is rotated to select the required objective lens for observation. The objective changer can be in a relatively stable state due to the pressure of the positioner. However, after a long time of use, the contact area between the positioner and the objective lens changer becomes smooth due to long-time friction, so that the positioner loses the fixing ability of the objective lens changer to some extent. Further, the repeated positioning accuracy is not high, and in some environments with high application accuracy, because the objective lens cannot be accurately positioned, the definition of the image is affected when the objective lens is switched to the optical path system, and the requirement of the required definition of the image cannot be met. In addition, the position detection sensor and the stepping motor of the electric objective lens changer in the prior art can cause the problem of poor imaging of the objective lens with inaccurate positioning due to gradual accumulated errors in the long-term use process in the process of objective lens changing.

Disclosure of Invention

The invention provides an electric objective converter based on electromagnetic positioning, which solves the problems of low repeated positioning precision caused by long-term abrasion of a positioner on the electric objective converter in the prior art and long-term accumulated error in objective conversion.

The technical scheme adopted by the invention for solving the technical problems is as follows: an electric objective lens converter based on electromagnetic positioning comprises a motor, a rotating disc, a fixed frame and an electromagnetic positioning device; a plurality of grooves are formed in the rotating disc; the fixing frame comprises a base, a motor bracket and a shell; the base is provided with an interface used for being installed on a microscope lens cone; the shell is arranged below the base and connected with the base to form a box body with an opening at one end; the motor bracket is arranged in the box body, and the rotating disc is rotatably arranged at an opening of the box body; the motor is fixed on the motor bracket; the motor is connected with the rotating disc.

Further, the method comprises the following steps: the electromagnetic positioning device comprises a push-pull electromagnet and a position detection device.

Further, the method comprises the following steps: the position detection device includes a plurality of photoelectric sensors and a sensing chip; the photoelectric sensors are arranged on the motor bracket; the sensing chip is mounted on the rotating disk.

Further, the method comprises the following steps: a circle of steel balls are arranged between the rotating disc and the shell, and friction between the rotating disc and the shell is reduced.

Further, the method comprises the following steps: a first gear is arranged on the motor rotating shaft; a second gear is arranged on the rotating disc; the first gear and the second gear are meshed.

Further, the method comprises the following steps: the motor is a stepping motor.

The invention has the beneficial effects that: according to the electromagnetic positioning-based electric objective lens converter, the objective lens transposition is realized by controlling the stepping motor, the in-place feedback is realized by detecting the photoelectric sensor, the accurate positioning of the turntable is realized by controlling the on-off state of the push-pull electromagnet, the accumulated error can be effectively eliminated, the abrasion of the positioning mechanism is reduced, and the service life of equipment is prolonged.

Drawings

FIG. 1 is a schematic diagram of an electro-magnetic positioning based motorized objective lens changer;

fig. 2 is a schematic structural diagram of an electromagnetic positioning device.

Labeled as: 1. an objective lens; 2. rotating the disc; 3. a sensing chip; 4. a housing; 5. a photosensor; 6. a base; 7. steel balls; 8. a motor; 9. a motor bracket; 10. a first gear; 11. a second gear; 12. push-pull type electromagnet.

Detailed Description

For the purpose of enhancing the understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and examples, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.

Examples

As shown in fig. 1 and 2, an electric objective lens converter based on electromagnetic positioning comprises a motor 8, a rotating disc 2, a fixing frame and an electromagnetic positioning device; a plurality of grooves are formed in the rotating disc 2; the fixed frame comprises a base 6, a motor bracket 9 and a shell 4; the base 6 is provided with an interface for being mounted on a microscope lens cone; the shell 4 is arranged below the base 6 and connected with the base 6 to form a box body with an opening at one end; the motor bracket 9 is arranged in the box body, and the rotating disc 2 is rotatably arranged at an opening of the box body; the motor 8 is fixed on the motor bracket 9; the motor 8 is connected with the rotating disc 2.

On the basis, the electromagnetic positioning device comprises a push-pull electromagnet 12 and a position detection device.

On the basis of the above, the position detection device includes a plurality of photosensors 5 and a sensor chip 3; the plurality of photoelectric sensors 5 are arranged on the motor bracket 9; the sensor chip 3 is mounted on the rotating disc 2.

On the basis, a circle of steel balls 7 are arranged between the rotating disc 2 and the shell 4.

On the basis, a first gear 10 is arranged on the rotating shaft of the motor 8; a second gear 11 is arranged on the rotating disc 2; the first gear 10 and the second gear 11 are engaged.

On the basis, the motor 8 is a stepping motor.

In practical use, the motor 8 drives the rotating disc 2 to rotate through the first gear 10 and the second gear 11, so as to drive the objective lens 1 to switch; when the sensing piece 3 reaches the photoelectric sensor 5 corresponding to the designated position, the photoelectric sensor 5 detects a signal and feeds back an objective lens in-place signal, the push-pull type electromagnet 12 ejector rod extends out of the groove just extending into the rotating disc 2, the rotating disc 2 is locked, the rotating disc 2 is accurately positioned, and the objective lens 1 is converted once. When the next objective lens switching instruction comes, the ejector rod of the push-pull electromagnet 12 contracts, the rotating disc 2 is released, and the steps are repeated.

The above embodiments should not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent transformations fall within the protection scope of the present invention.

Claims

1. An electro-magnetic positioning based motorized objective lens changer, comprising: comprises a motor (8), a rotating disc (2), a fixing frame and an electromagnetic positioning device; a plurality of grooves are formed in the rotating disc (2); the fixed frame comprises a base (6), a motor bracket (9) and a shell (4); the base (6) is provided with an interface used for being installed on a microscope lens cone; the shell (4) is arranged below the base (6) and connected with the base (6) to form a box body with an opening at one end; the motor support (9) is arranged in the box body, and the rotating disc (2) is rotatably arranged at an opening of the box body; the motor (8) is fixed on the motor bracket (9); the motor (8) is connected with the rotating disc (2).

2. An electromagnetic positioning based motorized objective lens changer as recited in claim 1, wherein: the electromagnetic positioning device comprises a push-pull electromagnet (12) and a position detection device.

3. An electromagnetic positioning based motorized objective lens changer as recited in claim 2, wherein: the position detection device comprises a plurality of photoelectric sensors (5) and a sensing sheet (3); the photoelectric sensors (5) are arranged on the motor bracket (9); the sensing plate (3) is arranged on the rotating disc (2).

4. An electromagnetic positioning based motorized objective lens changer as recited in claim 1, wherein: a circle of steel balls (7) are arranged between the rotating disc (2) and the shell (4).

5. An electromagnetic positioning based motorized objective lens changer as recited in claim 1, wherein: a first gear (10) is arranged on a rotating shaft of the motor (8); a second gear (11) is arranged on the rotating disc (2); the first gear (10) and the second gear (11) are meshed.

6. An electromagnetic positioning based motorized objective lens changer as recited in claim 1, wherein: the motor (8) is a stepping motor.