WO2016011650A1

WO2016011650A1 - Microscope focusing device

Info

Publication number: WO2016011650A1
Application number: PCT/CN2014/082963
Authority: WO
Inventors: 杨仕桐; 林健鸿
Original assignee: 广州微点焊设备有限公司
Priority date: 2014-07-24
Filing date: 2014-07-24
Publication date: 2016-01-28

Abstract

A microscope focusing device which carries out focusing through a longitudinally arranged hand wheel (108). The microscope focusing device comprises an installation frame (101) and a focusing frame (102). The installation frame (101) comprises a microscope installation end (103) and a focusing end (104). The focusing end (104) is fixedly provided with a focusing nut (106). The focusing frame (102) is provided with a groove (105) and a focusing threaded rod (107) longitudinally penetrating the groove (105). The installation frame (101) is transversely arranged, and the focusing end (104) of the installation frame (101) is preset in the groove (105) of the focusing frame (102). The focusing threaded rod (107) is in threaded connection with the focusing nut (106) of the focusing end (104), so as to install the focusing end (104) of the installation frame (101) in the focusing frame (102) in an up-down movable manner. The microscope focusing device is capable of realizing fine adjustment of the focal distance of a microscope through rotation of the longitudinally arranged focusing threaded rod (107), so that the device has the advantages of zero impact on operation space, simple structure and convenient maintenance and the like and thus is different from a conventional focusing device which adjusts the focal distance of a microscope through a transversely arranged hand wheel.

Description

Microscope focusing device

Technical field

The present invention is in the field of microscopic optical amplification, and more particularly, the present invention relates to a microscope focusing apparatus. Background technique

Various microscopic optical devices, including stereo microscopes, biological microscopes, monocular microscopes or three-way microscopes, are required to be equipped with a focusing device to adjust the distance between the lens and the object to be observed. The conventional microscope focusing device adopts a gear and a rack structure. When the focusing is performed, the gear wheel is operated by the horizontal hand wheel of the horizontal device, and the rack of the longitudinal device is driven up and down to realize the focal length adjustment of the microscope lens. However, with the development of micro-welding in the direction of automation, the space of the welding area becomes very compact and valuable, and it is often unable to provide sufficient manipulation space for the transverse hand wheel, thus limiting the microscope focusing device of the conventional transverse hand wheel. On the other hand, since the rack and pinion of the conventional microscope focusing device requires a compact mesh, the structure is so precise that installation and maintenance are difficult and expensive.

In view of this, it is indeed necessary to propose a microscope focusing device which is simple in structure and does not require a lateral operating space. Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide a microscope focusing apparatus which is simple in structure and longitudinally operated to overcome the problems of the prior art focusing apparatus being expensive and the lateral operating space being insufficient.

Before introducing the present invention, it is first necessary to clarify the following concepts: The generalized microscope focusing device includes coarse adjustment and fine adjustment of the distance between the lens and the object to be observed after focusing on the microscope, wherein the coarse adjustment focal length adjustment distance is generally above 2 cm, and the fine adjustment focal length The adjustment distance is generally within 2 cm. The microscope focusing device proposed by the invention mainly refers to fine adjustment of the focal length so that the observed object can be clear on the microscopic optical lens. Imaging device.

In order to achieve the above object, the present invention provides a microscope focusing device including a mounting frame and a focusing frame; the mounting frame includes a microscope mounting end and a focusing end, and a focusing nut is fixed at the focusing end; The focusing frame is provided with a groove, and is provided with a focusing screw extending longitudinally through the groove; the mounting frame is laterally disposed, and the focusing end is preset in the groove of the focusing frame; the focusing screw and the focusing The focusing nut of the end is screwed, so that the focusing end of the mounting frame can be mounted up and down in the focusing frame, and the mounting frame can be driven up and down by rotating the focusing screw, thereby adjusting the focal length of the microscope.

As an improvement of the microscope focusing device of the present invention, the focusing screw is screwed into the focusing frame from top to bottom, and a vertical hand wheel is mounted at the top end thereof.

As an improvement of the microscope focusing device of the present invention, two compression springs sleeved on the focusing screw are preset in the groove of the focusing frame, and the two compression springs are respectively located at the upper and lower sides of the focusing end of the mounting frame. The sides are each pre-set with a certain amount of compression.

As an improvement of the microscope focusing device of the present invention, a positioning pin penetrating through the groove is fixed on the focusing frame, and a central portion of the positioning pin is vertically movable into a corresponding pin hole opened in the focusing end of the mounting frame.

As an improvement of the microscope focusing device of the present invention, the groove of the focusing frame is a longitudinal groove, and the edge shape of the focusing end of the mounting frame is adapted to the cross-sectional shape of the focusing frame groove.

As an improvement of the microscope focusing device of the present invention, a matching concave-convex engaging structure is formed between the focusing end of the mounting frame and the groove of the focusing frame.

As an improvement of the microscope focusing device of the present invention, the focusing end of the mounting frame is designed to have three semi-cylindrical convex structures, and the grooves of the focusing frame are correspondingly designed to have three semi-cylindrical grooves. structure.

As an improvement of the microscope focusing device of the present invention, the focusing nut is fixed to the focusing end of the mounting frame by inlaying.

As an improvement of the microscope focusing device of the present invention, the microscope mounting end of the mounting frame is excellent Selected as a ring, the microscope is mounted in the center hole of the ring and locked by a set screw.

As an improvement of the microscope focusing device of the present invention, the mounting frame and the focusing frame are made of aluminum.

Compared with the prior art, the microscope focusing device of the invention can finely adjust the focal length of the microscope by rotating the focusing screw disposed in the longitudinal direction, thereby having the advantages of not affecting the operation space, simple structure, convenient maintenance, etc., which is different from A focusing device that adjusts the focal length of a microscope by means of a transverse handwheel. DRAWINGS

The microscope focusing device of the present invention and its beneficial effects will be described in detail below with reference to the accompanying drawings and specific embodiments.

1 is a schematic view showing the mounting structure of the microscope focusing device of the present invention on a microscope stand.

Fig. 2 is a schematic view showing the lateral cooperation structure of the mounting frame and the focusing frame of the microscope focusing device of the present invention. detailed description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The specific embodiments described in the specification are to be construed as illustrative only and not limiting.

Referring to Figures 1 and 2, the microscope focusing device of the present invention is mounted on a microscope stand that includes a mounting frame 101 and a focusing frame 102.

The mounting frame 101 has a rod shape, one end of which is a display mirror mounting end 103, and the other end of which is a focusing end 104. The louver mounting end 103 is preferably annular and the louver is mounted in the annular central bore 123 and locked by a set screw 124. A focus nut 106 embedded therein is preset on the focus end 104.

A longitudinal groove 105 is defined in the middle of the focusing frame 102, and the focusing end 104 of the mounting frame 101 is preset in the groove 105 of the focusing frame 102. The top end and the bottom frame of the groove 105 are respectively provided with screw holes aligned with each other, and a focusing screw 107 passes through the screw hole and the focusing nut 106 of the focusing end 104. The focusing frame 102 is inserted from top to bottom so that the focusing end 104 can be mounted up and down in the focusing frame 102; the top end of the focusing screw 107 is provided with a hand wheel 108 for easy operation. Since the edge shape of the focusing end 104 is adapted to the cross-sectional shape of the groove 105 such that the connection between the two is a fitting connection rather than an interference connection, the focusing can be utilized by rotating the vertical hand wheel 108. The screw 107 drives the mounting frame 101 up and down to move the microscope mounted on the mounting end 103 of the mounting frame 101 up and down to achieve a focusing operation.

In order to avoid or reduce the falling due to the gravity of the microscope during focusing, the present invention also presets two compression springs 113, 114, which are sleeved on the focusing screw 107, in the groove 105 of the focusing frame 102, two The compression springs 113, 114 are respectively located on the upper and lower sides of the focusing end 104 and are each provided with a certain amount of compression, so that the focusing screw 107 can be rotated under a certain tension. This not only reduces the radial swing of the mounting frame 101, but also enables a more continuous hand feel when the vertical hand wheel 108 is rotated.

Referring to FIG. 2, in order to further reduce the radial swing of the mounting frame 101, the present invention designs the focusing end 104 of the mounting frame 101 and the groove 105 of the focusing frame 102 to be adapted to the concave-convex engaging structure, for example, to be adjusted. The focal end 104 is designed as a three-cylindrical raised structure 201, while the recess 105 of the focusing frame 102 is correspondingly designed as a three-cylindrical recessed structure 202.

In addition, the present invention separately opens a pin hole on the top and bottom frames of the groove 105 of the focusing frame 102, and correspondingly opens a pin hole at the focusing end 104 of the mounting frame 101; 116 are respectively fixed in the corresponding pin holes of the mounting frame 101, and the middle portion of the positioning pin 203 can be inserted into the pin hole of the focusing end 104 so as to be movable up and down, thereby further avoiding the radial swing of the focusing end 104.

Referring to FIG. 1, a microscope stand for mounting the above-described focusing device includes a stand base 112 and a column 111. Wherein, the bracket base 112 is horizontally disposed, and the pillar 111 is vertically fastened on the bracket base 112. The focusing frame 102 of the microscope focusing device is fixed with a column ring 109 on the rear side of the groove 105, and a set screw 110 with a hand wheel is preset on the column ring 109. During installation, the column ring 109 is sleeved on the column 111, and the zoom lens adjusting device can be vertically adjusted to be mounted on the display mirror bracket by using the set screw 110. On. Obviously, the coarse adjustment of the focal length of the microscope (i.e., the adjustment of the height of the microscope) can be achieved by adjusting the position of the column ring 109 on the column 111.

In order to reduce the production cost and facilitate the maintenance, the focusing nut 106, the focusing screw 107, and the set screws 110, 124 used in the microscope focusing device of the present invention are all equipped with standard parts, for example, the focusing nut 106 is generally commercially available. Standard part mounting nut for M8 or M10. In this way, when the screws and nuts wear out after a period of use, only a new standard part needs to be replaced.

Since reducing the radial oscillation of the microscope focusing device during the focusing shift is the key to improving the quality of the product, the microscope focusing device of the present invention generally uses aluminum to draw the focusing frame 102 and the mounting frame 101 in a mold for batching. produce. This is because the aluminum profile drawn by the mold has high precision for the structure of the circular hole and the semi-cylindrical shape, which can ensure the precision of the structure of the positioning pin 203, the semi-cylindrical projection 201 and the groove 202, thereby more effectively reducing Radial oscillation when focusing the displacement.

It can be seen from the above description that the microscope focusing device proposed by the present invention is simple in structure, convenient in processing and installation, and has at least the following advantages compared with the prior art:

1) The sum of processing cost, installation cost and material cost is estimated to be only less than RMB 100, which is much lower than the microscope focusing device of the existing rack and pinion structure (cost is at least RMB 200 or more;);

2) The microscope is adjusted by the vertical handwheel, so there is no need for lateral operation space, which avoids the problem of insufficient lateral space caused by the compact operation space of the existing micro-welding automated production line.

Those skilled in the art to which the invention pertains may also make various modifications and changes to the embodiments described above. Therefore, the present invention is not limited to the specific embodiments disclosed and described, and the modifications and variations of the present invention are intended to fall within the scope of the appended claims. In addition, although some specific terms are used in the specification, these terms are merely for convenience of description and do not constitute any limitation to the present invention.

Claims

Claim

A microscope focusing device, comprising: a mounting frame and a focusing frame; the mounting frame includes a microscope mounting end and a focusing end, and the focusing end is fixed with a focusing nut; the focusing frame is opened a focusing screw provided with a longitudinal through-groove; the mounting frame is laterally disposed, the focusing end of which is preset in the groove of the focusing frame; the focusing screw thread of the focusing screw and the focusing end The connection is adjusted so that the focusing end of the mounting frame can be mounted up and down in the focusing frame, and the mounting frame can be moved up and down by rotating the focusing screw, thereby adjusting the focal length of the microscope.

2. The microscope focusing device according to claim 1, wherein: the focusing screw is screwed into the focusing frame from top to bottom, and a vertical hand wheel is attached to the top end.

3. The microscope focusing device according to claim 1, wherein: two compression springs sleeved on the focusing screw are preset in the groove of the focusing frame, and the two compression springs are respectively installed. The upper and lower sides of the focusing end of the frame are pre-set with a certain amount of compression.

4. The microscope focusing device according to claim 1, wherein: the positioning frame is fixed with a positioning pin extending through the groove, and the central portion of the positioning pin is vertically movable into the focusing end of the mounting frame. Corresponding to the pin hole.

The microscope focusing device according to any one of claims 1 to 4, wherein: the groove of the focusing frame is a longitudinal groove, the edge shape of the focusing end of the mounting frame and the focusing frame groove The cross-section shape ^ is adapted.

6. The microscope focusing device according to claim 5, wherein: the focusing end of the mounting frame and the groove of the focusing frame are adapted to the concave-convex engaging structure.

7. The microscope focusing device according to claim 6, wherein: the focusing end of the mounting frame is designed to have three semi-cylindrical protruding structures, and the grooves of the focusing frame are correspondingly designed to have three A semi-cylindrical groove structure.

The microscope focusing device according to any one of claims 1 to 4, wherein the focusing nut is fixed to the focusing end of the mounting frame by inserting.

The microscope focusing device according to any one of claims 1 to 4, wherein: the microscope mounting end of the mounting frame is preferably annular, the microscope is mounted in the annular central hole and is locked by a set screw tight.

The microscope focusing device according to any one of claims 1 to 4, wherein the mounting frame and the focusing frame are made of aluminum.