Up-down focusing mechanism of microscope

Abstract

The utility model discloses an up-and-down focusing mechanism of a microscope, which relates to the technical field of microscopes and comprises a driving box, a base block is movably connected to the front surface of the driving box, and a sliding guide mechanism is arranged between the driving box and the base block; the driving mechanism is fixedly mounted in the driving box, and the driving mechanism is used for driving the base block to vertically move; the slide switch is fixedly mounted in the driving box, and the slide switch is used for controlling the driving mechanism to stop according to the position of the base block. The sliding guide mechanism is additionally arranged between the driving box and the base block, the base block can be limited and guided in the moving process in the vertical direction, the lifting process of the base block is more stable and smoother, meanwhile, the slide switch is matched with the base block, the driving mechanism can be controlled to stop according to the lifting position of the base block, and the working efficiency is improved. And the situation that the gear is stuck due to idle running of the motor is avoided, so that the use quality of the microscope is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of microscopes, in particular to an up and down focusing mechanism of a microscope. Background Art

[0002] When observing a sample through a microscope, if the image seen by the sample under the microscope is blurry, it is necessary to focus the microscope (ie, adjust the distance between the objective lens and the sample) to obtain a clean image.

[0003] In the prior art, the electric focusing mechanism of the microscope usually adopts the method of moving the microscope host, that is, the motor control board controls the lead screw motor to rotate at a speed corresponding to the focusing speed gear, driving the stage to make a linear motion in the vertical direction, so as to adjust the height of the stage. At the same time, the microscope host can slide up and down along the dovetail plate for focusing. However, it is found in actual use that during the adjustment of the microscope, the sliding of the microscope host along the dovetail plate belongs to gap sliding, which has the problem of unstable sliding and easily causes the sliding to be not smooth. At the same time, the motor is prone to idling when driven, which easily causes the gears in the focusing mechanism of the microscope to get stuck, affecting the use quality of the microscope. For this reason, a vertical focusing mechanism of the microscope is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a vertical focusing mechanism for a microscope to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a vertical focusing mechanism of a microscope, comprising:

[0006] A driving box, wherein the front of the driving box is movably connected with a base block, a sliding guide mechanism is provided between the driving box and the base block, and the sliding guide mechanism is used for limiting and guiding the base block during the vertical movement process on the front of the driving box;

[0007] A driving mechanism, the driving mechanism is fixedly installed inside the driving box, and the driving mechanism is used to drive the vertical movement of the base block;

[0008] A travel position switch is fixedly installed inside the driving box, and is used to control the stop of the driving mechanism according to the position of the base block.

[0009] Preferably, a sliding guide rail is fixedly connected between the base block and the drive box, the fixed end of the sliding guide rail is fixedly connected to the front of the drive box, the movable end of the sliding guide rail is fixedly connected to one side of the drive box on the front of the base block, and a detachable side cover is fixedly connected to the back of the drive box.

[0010] Preferably, a dock is fixedly connected to the side of the base block facing the drive box, the outer wall of the dock extends from the inner side of the vertical slot opened on the front of the drive box to the inner cavity of the drive box, and the side of the dock away from the base block is convex outward.

[0011] Preferably, the travel switch includes a switch base, which is fixedly installed inside the drive box, and micro switches are fixedly installed in the middle and bottom of the side walls of the base block. The two micro switches are axially symmetrically arranged, and a focus position detection plate is fixedly connected to the top of the back side of the switch base, and the raised part on the back side of the micro switch is located at the front position of the micro switch.

[0012] Preferably, the driving mechanism includes an axis frame, which is fixedly installed at the bottom of the inner cavity of the driving box, a rotatable transmission shaft is movably connected to the middle of the axis frame, a nylon gear is fixedly connected to the end of the transmission shaft, a transmission assembly is provided between the outer wall of the nylon gear and the dock, a driving motor for driving the transmission shaft to rotate is fixedly installed on the top of the axis frame, and the driving motor is electrically connected to the micro switch through a focus position detection plate.

[0013] Preferably, the transmission assembly includes a rack and a nylon gear, the rack is fixedly connected to one side of the raised portion on the back of the dock, the nylon gear is fixedly connected to the end of the transmission shaft, and the outer wall of the nylon gear is meshed with the side wall of the rack.

[0014] Preferably, a handle shaft is fixedly mounted on one side of the drive box, and a shaft body is fixedly mounted on the other side of the drive box.

[0015] Technical effects and advantages of the utility model:

[0016] The utility model adds a sliding guide mechanism between the driving box and the base block, which can play a limiting and guiding role in the process of the base block moving in the vertical direction, making the lifting process of the base block more stable and smooth. At the same time, the travel switch cooperates with the base block to control the driving mechanism to stop according to the lifting position of the base block, avoiding the situation of gear jamming caused by motor idling, thereby helping to improve the use quality of the microscope. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is one of the overall structural schematic diagrams of the utility model.

[0018] Figure 2 This is the second schematic diagram of the overall structure of the utility model.

[0019] Figure 3 It is a schematic diagram of the separate structure of the drive box and the drive mechanism of the utility model.

[0020] Figure 4It is a three-dimensional exploded structural schematic diagram of the drive box of the utility model.

[0021] In the figure: 100, drive box; 101, side cover; 102, handle shaft; 103, shaft body; 200, drive mechanism; 201, drive motor; 202, shaft frame; 203, transmission shaft; 204, nylon gear; 300, base block; 301, sliding guide rail; 302, dock; 303, rack; 400, switch base; 401, micro switch; 402, focus position detection board. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides Figure 1-4 The up and down focusing mechanism of a microscope shown in the figure includes a driving box 100, a driving mechanism 200 and a sliding switch. A handle shaft 102 is fixedly installed on one side of the driving box 100, and a shaft body 103 is fixedly installed on the other side of the driving box 100. A base block 300 is movably connected to the front of the driving box 100. The base block 300 is used to carry the microscope host. The lifting and lowering of the base block 300 can be converted into focusing of the microscope host. A sliding guide mechanism is provided between the driving box 100 and the base block 300. The sliding guide mechanism is used for limiting the guide of the base block 300 during the vertical movement process of the front side of the driving box 100. The driving mechanism 200 is fixedly installed inside the driving box 100. The driving mechanism 200 is used to drive the vertical movement of the base block 300. The sliding switch The switch is fixedly installed inside the drive box 100, and the position switch is used to control the stop of the drive mechanism 200 according to the position of the base block 300. During the lifting process of the base block 300, the sliding guide mechanism is used to limit and guide, which can ensure that the base block 300 performs stable linear movement at the front position of the drive box 100, thereby avoiding the problem of unsmooth sliding of the base block 300 during the lifting process, and improving the lifting stability of the base block 300. In addition, in conjunction with the position switch, the drive motor 201 in the drive mechanism 200 can be stopped according to the upper and lower starting and end positions of the base block 300, which can avoid the problem of the motor idling after the base block 300 reaches the end position, which easily causes the gear to get stuck, thereby achieving the quality of the microscope focusing operation.

[0024] It should be noted that a sliding guide rail 301 is fixedly connected between the base block 300 and the drive box 100, the fixed end of the sliding guide rail 301 is fixedly connected to the front of the drive box 100, the movable end of the sliding guide rail 301 is fixedly connected to one side of the drive box 100 on the front of the base block 300, and a detachable side cover plate 101 is fixedly connected to the back of the drive box 100. The movable end and the fixed end of the sliding guide rail 301 are respectively connected and fixed to the base block 300 and the drive box 100, so that the linear motion characteristics of the movable end and the fixed end of the sliding guide rail 301 itself can be utilized to ensure the stability of the base block 300 during the movement.

[0025] Furthermore, the driving mechanism 200 includes an axis frame 202, which is fixedly installed at the bottom of the inner cavity of the driving box 100, and a rotatable transmission shaft 203 is movably connected to the middle of the axis frame 202. The transmission shaft 203 and the driving motor 201 are transmitted through a reversing gear assembly, so that the transmission shaft 203 and the driving motor 201 can be assembled in a vertical state to meet the installation requirements. A nylon gear 204 is fixedly connected to the end of the transmission shaft 203, and a transmission assembly is provided between the outer wall of the nylon gear 204 and the dock 302. A driving motor 201 for driving the transmission shaft 203 to rotate is fixedly installed on the top of the axis frame 202, and a dock 302 is fixedly connected to the side of the base block 300 facing the driving box 100. The outer wall of the dock 302 extends from the inner side of the vertical slot opened on the front of the driving box 100 to the inner cavity of the driving box 100. The dock 302 2 The side away from the base block 300 is outwardly convex, and the transmission assembly includes a rack 303 and a nylon gear 204. The rack 303 is fixedly connected to one side of the convex part on the back of the dock 302, and the nylon gear 204 is fixedly connected to the end of the transmission shaft 203. The outer wall of the nylon gear 204 is meshed with the side wall of the rack 303. The driving motor 201 can drive the transmission shaft 203 to rotate on the shaft frame 202 through the reversing transmission of the reversing gear assembly, thereby driving the nylon gear 204 to rotate. Since the nylon gear 204 is meshed with the rack 303 fixed on the dock 302, the nylon gear 204 can have a higher lubricity with the rack 303 than the copper gear or alloy gear used in the prior art, which helps to avoid the problem of gear and rack being stuck.

[0026] Furthermore, the travel switch includes a switch base 400, which is fixedly installed inside the drive box 100, and micro switches 401 are fixedly installed in the middle and bottom of the side wall of the base block 300, and the two micro switches 401 are axially symmetrically arranged. A focus position detection plate 402 is fixedly connected to the top of the back side of the switch base 400, and the raised part on the back side of the micro switch 401 is located at the front position of the micro switch 401. The drive motor 201 is electrically connected to the micro switch 401 through the focus position detection plate 402. It should be noted that the micro switch 401 and the drive motor 201 are electrically connected to the focus position detection plate 402 through wires. The base block 300 is electrically connected to the focus position detection plate 402 during the lifting movement. During the operation, the dock 302 is driven to move. When the dock 302 moves to the moving contact position of the micro switch 401 at the corresponding position, the micro switch 401 can be closed, and the micro switch 401 transmits the electrical signal to the focus position detection board 402, so that the focus position detection board 402 can control the drive motor 201 to stop rotating. The axisymmetric arrangement of the two micro switches 401 can ensure that the drive motor 201 is controlled to stop rotating when the dock 302 is at the upper and lower end positions, and the micro switch 401 controls the power on and off of the drive motor 201, which can avoid the stability of the drive motor 201 being easily stuck due to idling, which is helpful to improve the quality of the focusing operation of the microscope.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vertical focusing mechanism for a microscope, characterized in that: include: A driving box (100), wherein the front side of the driving box (100) is movably connected to a base block (300), a sliding guide mechanism is provided between the driving box (100) and the base block (300), and the sliding guide mechanism is used for limiting and guiding the base block (300) during the vertical movement process on the front side of the driving box (100); A driving mechanism (200), wherein the driving mechanism (200) is fixedly installed inside the driving box (100), and the driving mechanism (200) is used to drive the base block (300) to move vertically; A travel position switch is fixedly installed inside the drive box (100), and is used to control the stopping of the drive mechanism (200) according to the position of the base block (300).

2. The up and down focusing mechanism of a microscope according to claim 1, characterized in that: A sliding guide rail (301) is fixedly connected between the base block (300) and the drive box (100); a fixed end of the sliding guide rail (301) is fixedly connected to the front of the drive box (100); a movable end of the sliding guide rail (301) is fixedly connected to one side of the drive box (100) at the front of the base block (300); and a detachable side cover plate (101) is fixedly connected to the back of the drive box (100).

3. The up and down focusing mechanism of a microscope according to claim 2, characterized in that: A dock (302) is fixedly connected to one side of the base block (300) facing the drive box (100); an outer wall of the dock (302) extends from the inner side of a vertical slot opened on the front of the drive box (100) to the inner cavity of the drive box (100); and the side of the dock (302) away from the base block (300) is outwardly convex.

4. The up and down focusing mechanism of a microscope according to claim 3, characterized in that: The travel switch comprises a switch base (400), the switch base (400) is fixedly mounted inside the drive box (100), micro switches (401) are fixedly mounted at the middle and bottom of the side wall of the base block (300), the two micro switches (401) are arranged axially symmetrically, a focus position detection plate (402) is fixedly connected to the top of the back side of the switch base (400), and a raised portion on the back side of the micro switch (401) is located at the front side of the micro switch (401).

5. The up and down focusing mechanism of a microscope according to claim 4, characterized in that: The driving mechanism (200) comprises an axis frame (202), wherein the axis frame (202) is fixedly mounted on the bottom of the inner cavity of the driving box (100), a rotatable transmission shaft (203) is movably connected to the middle of the axis frame (202), a nylon gear (204) is fixedly connected to the end of the transmission shaft (203), a transmission assembly is provided between the outer wall of the nylon gear (204) and the dock (302), a driving motor (201) for driving the transmission shaft (203) to rotate is fixedly mounted on the top of the axis frame (202), and the driving motor (201) is electrically connected to the micro switch (401) via a focus position detection plate (402).

6. The up and down focusing mechanism of a microscope according to claim 5, characterized in that: The transmission assembly comprises a rack (303) and a nylon gear (204); the rack (303) is fixedly connected to one side of a raised portion on the back of the dock (302); the nylon gear (204) is fixedly connected to an end of a transmission shaft (203); and the outer wall of the nylon gear (204) is meshedly connected to the side wall of the rack (303).

7. The up and down focusing mechanism of a microscope according to claim 1, characterized in that: A handle shaft (102) is fixedly mounted on one side of the drive box (100), and a shaft body (103) is fixedly mounted on the other side of the drive box (100).

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