Focal length adjustable device of optical instrument

Abstract

The utility model discloses an adjustable focal length device of an optical instrument, which comprises an objective table and an electric sliding table, two sides of the objective table are thickened to form positioning parts, positioning holes are arranged on the positioning parts, the electric sliding table is vertically arranged on one side of the objective table, a fixed seat is arranged on a moving platform of the electric sliding table, a positioning frame is arranged on the fixed seat, and the positioning frame is arranged on the fixed seat. The two sides of the positioning frame are inserted into the positioning holes, the outer side faces of the positioning parts protrude to form limiting parts, limiting grooves are formed in the middles of the limiting parts, limiting pieces are inserted into the limiting grooves, an adjusting frame is arranged outside the objective table, and the two sides of the adjusting frame are fixedly connected with the limiting pieces. And an adjusting mechanism for driving the limiting piece and the objective table to move is mounted on the adjusting frame. The device is simple in structure, the lifting height of the objective table can be accurately controlled through the electric sliding table, the moved objective table can be positioned again through the adjusting mechanism and the limiting piece, the same group of samples do not need to be adjusted many times, and efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of optical instrument technology, and specifically to an adjustable focal length device for an optical instrument. Background Technology

[0002] Optical instruments are devices that use optical principles for observation, measurement, analysis, or operation, and are widely used in scientific research, industrial testing, medical, military, and communication fields.

[0003] Optical instruments include microscopes, which are equipped with stages. The focal length can be adjusted by moving the stage up and down. However, after adjusting to a suitable height, when testing another sample from the same set, the stage needs to be lowered or the eyepiece raised again. This requires readjusting the height, which affects the efficiency of use. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide an adjustable focal length device for an optical instrument, which can limit the stage by a limiting plate, and after the stage is pulled outward, it can be moved out from under the eyepiece, and after being pushed back, it can be repositioned by the insertion between the limiting plate and the stage, so as to solve the problem mentioned in the background art.

[0005] This utility model is achieved through the following technical solution: an adjustable focal length device for an optical instrument, including a stage and an electric slide. The two sides of the stage are thickened to form positioning parts, and positioning holes are provided on the positioning parts. The electric slide is vertically arranged on one side of the stage. A fixed seat is installed on the moving platform of the electric slide, and a positioning frame is installed on the fixed seat. The two sides of the positioning frame are inserted into the positioning holes. A limiting part is protruding on the outer surface of the positioning part, and a limiting groove is provided in the middle of the limiting part. A limiting piece is inserted into the limiting groove. An adjustment frame is provided outside the stage. The two sides of the adjustment frame are fixedly connected to the limiting pieces. An adjustment mechanism that drives the limiting pieces and the stage to move is installed on the adjustment frame.

[0006] As a preferred technical solution, the adjustment mechanism includes a lead screw, a gripping rod, and a fixed plate. One end of the fixed plate is bent and installed on the moving platform of the electric slide table, and the other end is embedded with a bearing. An adjustment part is formed by protrusion on the adjustment frame. The adjustment part is arranged laterally opposite to the fixed plate. The adjustment part is provided with a lead screw hole. The lead screw is threaded into the lead screw hole. One end of the lead screw is installed in the inner ring of the bearing, and the other end is fixedly connected to the gripping rod.

[0007] As a preferred technical solution, fixing rods are installed on both sides of the adjustment frame, and positioning sleeves are installed on the other end of each fixing rod, with the positioning sleeves fitted onto the positioning frame.

[0008] As a preferred technical solution, the limiting part is provided with a guide part inclined on both sides of the limiting groove.

[0009] As a preferred technical solution, the limiting pieces are all made of metal springs.

[0010] As a preferred technical solution, the adjustment mechanism and adjustment frame are offset from the stage hole on the stage.

[0011] As a preferred technical solution, one end of the electric slide table is equipped with a base, and the base has multiple fixing holes.

[0012] The beneficial effects of this utility model are as follows: This utility model has a simple structure. The electric slide can precisely control the lifting height of the stage, and the adjustment mechanism can move the stage back and forth. It is positioned by a limiting plate. When it is necessary to change the sample on the stage, the stage can be pulled outward along the positioning frame. The stage can squeeze the limiting plate, causing the limiting plate to bend and disengage from the limiting groove. After the limiting plate is no longer obstructed, the stage can be moved out from under the eyepiece for sample replacement. As the stage is pushed back to its original position, the limiting plate can be inserted back into the limiting groove, which can position the stage after movement. There is no need to readjust the height again, and the sample can be directly viewed, increasing efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a side view of the present invention;

[0016] Figure 3 This is a bottom view of the present invention.

[0017] The components include: 1. Platform; 2. Positioning part; 3. Handle; 4. Adjustment frame; 5. Limiting part; 6. Flow guide; 7. Limiting plate; 8. Fixing rod; 9. Positioning sleeve; 10. Fixing seat; 11. Electric slide; 12. Fixing plate; 13. Lead screw; 14. Positioning frame; 15. Adjustment part. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0020] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, an adjustable focal length device for an optical instrument according to this utility model includes a stage 1 and an electric slide 11. The two sides of the stage 1 are thickened to form positioning parts 2, and the positioning parts 2 are provided with positioning holes. The electric slide 11 is vertically arranged on one side of the stage 1. A fixed seat 10 is installed on the moving platform of the electric slide 11. A positioning frame 14 is installed on the fixed seat 10. The two sides of the positioning frame 14 are inserted into the positioning holes. A limiting part 5 is protruding on the outer surface of the positioning part 2. A limiting groove is provided in the middle of the limiting part 5. A limiting piece 7 is inserted into the limiting groove. An adjustment frame 4 is provided on the outside of the stage 1. The two sides of the adjustment frame 4 are fixedly connected to the limiting pieces 7. An adjustment mechanism that drives the limiting pieces 7 and the stage 1 to move is installed on the adjustment frame 4.

[0022] In this embodiment, the adjustment mechanism includes a lead screw 13, a grip rod 3, and a fixed plate 12. One end of the fixed plate 12 is bent and installed on the moving platform of the electric slide table 11, and the other end is embedded with a bearing. An adjustment part 15 protrudes from the adjustment frame 4. The adjustment part 15 is arranged laterally opposite to the fixed plate 12. The adjustment part 15 is provided with a lead screw hole, and the lead screw 13 is threaded into the lead screw hole. One end of the lead screw 13 is installed in the inner ring of the bearing, and the other end is fixedly connected to the grip rod 3, so that the fixed plate and the platform can move up and down synchronously along the moving platform.

[0023] In this embodiment, fixing rods 8 are installed on both sides of the adjusting frame 4, and positioning sleeves 9 are installed on the other end of the fixing rods 8. The positioning sleeves 9 are all fitted onto the positioning frame 14.

[0024] The positioning sleeve can position the adjustment frame, allowing it to move back and forth along the positioning frame, and also ensuring the stability of the limit plate installation.

[0025] In this embodiment, the limiting part 5 is provided with guide parts 6 on both sides of the limiting groove at an inclination. When the platform moves, the limiting piece can bend along the guide part until it enters the limiting groove. The platform can be positioned by the insertion between the limiting piece and the limiting groove.

[0026] In this embodiment, the limiting pieces 7 are all made of metal springs, so that when the stage is pulled, the stage can squeeze the limiting pieces, allowing the limiting pieces to bend and smoothly disengage from the limiting groove.

[0027] In this embodiment, the adjustment mechanism and adjustment frame 4 are offset from the mirror stage hole on the stage 1 to avoid affecting the passage of light.

[0028] In this embodiment, a base is installed at one end of the electric slide table 11. The base has multiple fixing holes, and bolts can pass through the fixing holes to fix the device on the platform.

[0029] Among them, the electric slide is a high-precision electric slide, such as a linear module, linear motor slide, or micron-level electric slide. The electric slide is controlled by a microcontroller installed inside the computer. The movement of the moving slide on the electric slide can be precisely controlled by the software, motion control card, servo driver and encoder on the computer. The above components are existing technologies, so they will not be described in detail.

[0030] The electric slide can move the fixed base, positioning frame and platform up and down. The focus can be adjusted by moving the platform up and down. Since the electric slide is controlled by a computer, the height of the platform can be quickly and accurately adjusted by inputting the lifting height on the computer.

[0031] After the height is determined, the screw can be rotated by holding the lever. The rotation of the screw drives the adjustment part and the adjustment frame, causing the adjustment frame to move along the positioning frame. The movement of the adjustment frame drives the limiting plate, and the limiting plate can push the stage, so that the sample on the stage can be perpendicular to the eyepiece.

[0032] Furthermore, the limiting plate can position the moved stage. When it is necessary to change the sample on the stage, the stage can be pulled outward along the positioning frame. The stage can squeeze the limiting plate, causing it to bend and disengage from the limiting groove. After the limiting plate is removed, the stage can be moved out from under the eyepiece for sample replacement. As the stage is pushed back to its original position, the limiting plate can be reinserted into the limiting groove, thus repositioning the moved stage. No further height adjustment is needed, allowing direct viewing of the sample and increasing efficiency.

[0033] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. An adjustable focal length device for an optical instrument, characterized in that: The system includes a stage (1) and an electric slide (11). The two sides of the stage (1) are thickened to form positioning parts (2). Positioning parts (2) are provided with positioning holes. The electric slide (11) is vertically arranged on one side of the stage (1). A fixed seat (10) is installed on the moving platform of the electric slide (11). A positioning frame (14) is installed on the fixed seat (10). The two sides of the positioning frame (14) are inserted into the positioning holes. A limiting part (5) is protruded on the outer surface of the positioning part (2). A limiting groove is provided in the middle of the limiting part (5). A limiting piece (7) is inserted into the limiting groove. An adjustment frame (4) is provided on the outside of the stage (1). The two sides of the adjustment frame (4) are fixedly connected to the limiting piece (7). An adjustment mechanism that drives the limiting piece (7) and the stage (1) to move is installed on the adjustment frame (4).

2. The adjustable focal length device for an optical instrument according to claim 1, characterized in that: The adjustment mechanism includes a lead screw (13), a handle (3), and a fixed plate (12). One end of the fixed plate (12) is bent and installed on the moving platform of the electric slide (11), and the other end is embedded with a bearing. An adjustment part (15) is protruding on the adjustment frame (4). The adjustment part (15) and the fixed plate (12) are arranged laterally opposite each other. The adjustment part (15) is provided with a lead screw hole. The lead screw (13) is threaded into the lead screw hole. One end of the lead screw (13) is installed in the inner ring of the bearing, and the other end is fixedly connected to the handle (3).

3. The adjustable focal length device for an optical instrument according to claim 1, characterized in that: Fixing rods (8) are installed on both sides of the adjusting frame (4), and positioning sleeves (9) are installed on the other end of the fixing rods (8). The positioning sleeves (9) are all fitted onto the positioning frame (14).

4. The adjustable focal length device for an optical instrument according to claim 1, characterized in that: The limiting part (5) is located on both sides of the limiting groove and is provided with a guide part (6) at an incline.

5. The adjustable focal length device for an optical instrument according to claim 1, characterized in that: The limiting pieces (7) are all made of metal springs.

6. The adjustable focal length device for an optical instrument according to claim 1, characterized in that: The adjustment mechanism and adjustment frame (4) are offset from the stage hole on the stage (1).

7. The adjustable focal length device for an optical instrument according to claim 1, characterized in that: One end of the electric slide (11) is equipped with a base, and the base has multiple fixing holes.

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