Focusing mechanism and microscope

Abstract

The application discloses a focusing mechanism and a microscope, the focusing mechanism comprises a stand column, the stand column is provided with a slide rail, and the surface of the slide rail is provided with a rack; the focusing sliding seat is connected with the sliding rail and can lift up and down relative to the stand column, a mounting groove is formed in the focusing sliding seat, and the sliding rail is contained in the mounting groove; the focusing hand wheel comprises a rotating part and a gear shaft connected with the rotating part, the gear shaft is arranged in the focusing sliding seat in a penetrating manner and can rotate relative to the focusing sliding seat, and the gear shaft comprises a gear part meshed with the rack; the circular rail is connected to the side wall of the mounting groove, the direct sliding connection mode of the focusing sliding seat and the sliding rail is replaced by adding the sliding connection between the circular rail and the focusing sliding seat and / or the sliding rail, the machining area is reduced, and then the production cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical instruments, in particular to a focusing mechanism and a microscope. BACKGROUND

[0002] The microscope is an instrument mainly used for magnifying micro-objects to be visible to the naked eye. The existing microscope usually adopts a column type lifting focusing mechanism. The structure of the column type lifting focusing mechanism includes a column, a sliding seat and a focusing hand wheel. The focusing hand wheel is connected with a gear shaft, the gear shaft is rotationally connected in the sliding seat, the column is provided with a guide rail with a rack, and the sliding seat is slidingly connected with the guide rail. When the focusing operation is performed, the rotation of the focusing hand wheel drives the gear shaft to rotate, thereby realizing the lifting of the sliding seat, and driving the objective lens connected to the sliding seat to move away from or approach the object table.

[0003] For example, the light condenser lifting structure for an inverted microscope disclosed in the Chinese utility model patent with the publication number CN217506258U adopts the above lifting structure. In order to improve the guiding property and the limiting effect of the sliding seat, the guide rail adopts the dovetail type guide rail disclosed in the above patent. The sliding seat is provided with a sliding groove matching the cross-sectional shape of the dovetail type guide rail, thereby reducing the horizontal movement of the sliding seat. However, this guide rail matching method has a small roughness requirement for the contact surface between the guide rail and the sliding seat and a large machining area, which leads to a large machining difficulty and a high production cost. UTILITY MODEL CONTENT

[0004] In order to reduce the production cost, the first purpose of the present application provides a focusing mechanism.

[0005] The focusing mechanism provided by the present application adopts the following technical scheme:

[0006] A focusing mechanism, comprising:

[0007] A column, the column is provided with a sliding rail, and the surface of the sliding rail is provided with a rack;

[0008] A focusing sliding seat, connected with the sliding rail and capable of rising and falling relative to the column, the focusing sliding seat is provided with a mounting groove, and the sliding rail is accommodated in the mounting groove;

[0009] A focusing hand wheel, including a rotating part and a gear shaft connected therewith, the gear shaft is arranged in the focusing sliding seat and is capable of rotating relative to the focusing sliding seat, and the gear shaft includes a gear part engaged with the rack; and

[0010] A circular rail, connected to the side wall of the mounting groove,

[0011] The two sides of the slide rail are provided with first guide grooves, and the circular rail part extends into the first guide grooves and is in linear contact sliding connection with the groove walls of the first guide grooves.

[0012] By adopting the above technical scheme, the connection form of the focusing sliding seat and the slide rail is replaced by the linear contact sliding connection form of the circular rail and the first guide groove, which first eliminates the processing surface matched between the focusing sliding seat and the circular rail, secondly, the linear contact connection further reduces the processing area compared with the surface contact connection, thereby effectively reducing the production cost. Secondly, the circular rail can also be replaced independently as consumables, thereby reducing the maintenance cost.

[0013] Preferably, the circular rail and the focusing sliding seat are in an integrated structure.

[0014] By adopting the above technical scheme, the integrated structure can improve the production efficiency of the focusing sliding seat, can be quickly produced by using profile stretching forming, and the structural strength is also correspondingly improved.

[0015] The application also provides another focusing mechanism adopting the following technical scheme

[0016] A focusing mechanism comprises:

[0017] A column is provided with a slide rail, and the surface of the slide rail is provided with a rack;

[0018] A focusing sliding seat is connected with the slide rail and can be raised and lowered relative to the column, the focusing sliding seat is provided with a mounting groove, and the slide rail is accommodated in the mounting groove;

[0019] A focusing hand wheel comprises a rotating part and a gear shaft connected therewith, the gear shaft is arranged in the focusing sliding seat and can be rotated relative to the focusing sliding seat, and the gear shaft comprises a gear part engaged with the rack; and

[0020] A circular rail is connected to the two sides of the slide rail;

[0021] The focusing sliding seat is provided with a second guide groove on the two side walls in the mounting groove, and the circular rail part extends into the second guide groove and is in linear contact sliding connection with the groove wall of the second guide groove.

[0022] By adopting the above technical scheme, the connection form of the focusing sliding seat and the slide rail is replaced by the linear contact sliding connection form of the circular rail and the second guide groove, which first eliminates the processing surface matched between the focusing sliding seat and the circular rail, secondly, the linear contact connection further reduces the processing area compared with the surface contact connection, thereby effectively reducing the production cost. Secondly, the circular rail can also be replaced independently as consumables, thereby reducing the maintenance cost.

[0023] Preferably, the circular rail and the slide rail are in an integrated structure.

[0024] By adopting the technical scheme, the integral structure can improve the production efficiency of the focusing sliding seat, can be quickly produced by using profile stretching forming, and the structural strength is also improved.

[0025] The application also provides another focusing mechanism adopting the following technical scheme

[0026] A focusing mechanism comprises:

[0027] A column is provided with a sliding rail, and the surface of the sliding rail is provided with a rack;

[0028] A focusing sliding seat is connected to the sliding rail and can be raised and lowered relative to the column, the focusing sliding seat is provided with a mounting groove, and the sliding rail is accommodated in the mounting groove;

[0029] A focusing hand wheel comprises a rotating part and a gear shaft connected thereto, the gear shaft is arranged in the focusing sliding seat and can rotate relative to the focusing sliding seat, and the gear shaft comprises a gear part engaged with the rack; and

[0030] A circular rail is connected to the focusing sliding seat or the sliding rail;

[0031] The two sides of the sliding rail are provided with first guide grooves, the two side walls of the focusing sliding seat in the mounting groove are provided with second guide grooves, the first guide grooves and the second guide grooves form a guide cavity for limiting the circular rail, and the circular rail is in linear contact with the cavity wall of the guide cavity.

[0032] By adopting the above technical scheme, the connection form of the focusing sliding seat and the sliding rail is replaced by the linear contact connection of the circular rail in the guide cavity instead of the existing surface contact sliding connection, only the surface area in contact with the circular rail needs to be processed, the processing area is effectively reduced, and the production cost is effectively reduced.

[0033] Preferably, the first guide groove has two symmetrically arranged first guide surfaces, the second guide groove has two symmetrically arranged second guide surfaces, and the circular rail is in linear contact with the first guide surfaces and the second guide surfaces.

[0034] By adopting the above technical scheme, the symmetrically arranged first guide surfaces and the second guide surfaces can position the circular rail when they are in contact with the circular rail, thereby improving the guiding property between the focusing sliding seat and the sliding rail.

[0035] Preferably, the focusing sliding seat is provided with at least one through slot communicating with the mounting groove, the through slot divides the focusing sliding seat into a main body part and a deformation part, and the focusing mechanism further comprises an adjusting member rotatably connected to the focusing sliding seat, when the adjusting member rotates relative to the focusing sliding seat, the deformation part is forced to move to the side of the main body part to increase the extrusion force between the focusing sliding seat and the sliding rail.

[0036] By adopting the technical scheme, when the adjusting piece rotates relative to the focusing slide, the deformation part moves close to or away from the side of the main part, during which the extrusion force between the circular rail and the focusing slide or the slide rail is realized, and then the damping between the focusing slide and the slide rail is changed, the force of rotating the focusing knob required for the focusing slide to rise and fall relative to the slide rail is adjusted, and the damping size, i.e. the hand feeling, can be adjusted according to different people.

[0037] In order to reduce the production cost, a second object of the application provides a microscope.

[0038] The microscope provided by the application adopts the following technical scheme:

[0039] A microscope comprises the focusing mechanism

[0040] By adopting the technical scheme, the connection between the focusing slide and the slide rail is increased by the circular rail to replace the direct sliding connection form, the area of the guide groove matched with the circular rail is reduced, and then the production cost is effectively reduced. In addition, the circular rail can also be replaced independently as consumables, and the maintenance cost is reduced.

[0041] In summary, the application includes at least one of the following beneficial technical effects:

[0042] 1. By increasing the sliding connection between the circular rail and the focusing slide and / or the slide rail to replace the direct sliding connection form between the focusing slide and the slide rail, the area of the guide groove matched with the circular rail is reduced, and then the production cost is effectively reduced;

[0043] 2. By adding the adjusting piece to change the distance between the deformation part and the main part and then change the damping between the focusing slide and the slide rail, the force of rotating the focusing knob required for the focusing slide to rise and fall relative to the slide rail is realized, and then the size of the damping, i.e. the rotating hand feeling, can be adjusted according to the needs of different people. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 It is a structural schematic view of the focusing mechanism in Example One;

[0045] Figure 2 It is a sectional view of the focusing mechanism in Example One;

[0046] Figure 3 It is a structural schematic view of the focusing mechanism in Example Two;

[0047] Figure 4 It is a structural schematic view of the focusing mechanism in Example Three;

[0048] Figure 5 It is a structural schematic view of the focusing mechanism in Example Five.

[0049] Explanation of reference numerals: 1, stand; 11, slide rail; 111, first guide groove; 112, first guide surface; 12, rack; 2, focusing slide; 21, mounting groove; 22, through groove; 23, deformation portion; 24, main body portion; 25, guide hole; 26, second guide groove; 261, second guide surface; 3, focusing hand wheel; 31, hand wheel portion; 32, gear shaft; 321, gear portion; 4, circular rail; 5, adjusting member; 6, fastener. DETAILED DESCRIPTION

[0050] The present application is further described in detail below with reference to the attached drawings.

[0051] It is to be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions as used herein are for illustrative purposes only and are not intended to be limiting.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Example 1

[0053] Figure 1 With Figure 2 The structure of a focusing mechanism of the present embodiment is shown, including a stand 1, a focusing slide 11, and a focusing hand wheel 3. One end of the stand 1 is connected to the base of a microscope, and a slide rail 11 is provided on one side of the stand 1. The slide rail 11 is arranged along the vertical direction of the stand 1 and has a certain length, and a rack 12 is provided on the outer surface of the slide rail 11.

[0054] The focusing hand wheel 3 includes two hand wheel portions 31 and a gear shaft 32 connected between the two hand wheel portions 31, and the gear shaft 32 has a gear portion 321 at the middle position. The gear shaft 32 is arranged through the focusing slide 11 and can rotate relative to the focusing slide 11, and the gear portion 321 is engaged with the rack 12, so that the up and down movement of the focusing slide 11 relative to the stand 1 is achieved by rotating the hand wheel portion 31.

[0055] The focusing slide 11 is provided with a mounting groove 21 on one side, the mounting groove 21 is in the form of one side opening, and the slide rail 11 is accommodated in the mounting groove 21. The slide rail 11 is provided with a first guide groove 111 on both sides, and the first guide groove 111 has symmetrically arranged first guide surfaces 112; the mounting groove 21 is provided with a second guide groove 26 on the side walls, and the second guide groove 26 has symmetrically arranged second guide surfaces 261, and the first guide groove 111 and the second guide groove 26 are oppositely arranged to form a guide cavity.

[0056] The focusing mechanism further comprises a circular rail 4 limited in the guide cavity, the outer surface of the circular rail 4 abuts against the first guide surfaces 112 and the second guide surfaces 261, and the circular rail 4 is in linear contact connection with the first guide surfaces 112 and the second guide surfaces 261. In the embodiment, the circular rail 4 extends along the vertical direction of the stand 1 and is connected with the base of the microscope, and the focusing slide 11 is connected with the slide rail 11 through the linear contact sliding connection with the circular rail 4.

[0057] In addition, the focusing slide 11 is further provided with at least one through groove 22, and one through groove 22 is taken as an example in the embodiment, the through groove 22 is communicated with the mounting groove 21 and divides the focusing slide 11 into a main body part 24 and a deformation part 23. The focusing slide 11 is further rotatably connected with an adjusting member 5, the adjusting member 5 is connected with the deformation part 23 and the main body part 24 and passes through the through groove 22, and in the embodiment, the adjusting member 5 is an adjusting screw, the deformation part 23 is provided with a guide hole 25, the adjusting screw with an inner hexagonal head can rotate relative to the guide hole 25, the end of the adjusting screw is threadedly connected with the main body part 24, and then when the adjusting screw rotates, the deformation part 23 can be driven to move close to the main body part 24, and when the deformation part 23 moves, the extrusion force between the first guide groove 111, the second guide groove 26 and the circular rail 4 gradually increases, at this time, the external driving force required when the focusing hand wheel 3 rotates increases, and then the rotation damping is adjusted. Embodiment two

[0058] Referring to Figure 3 A focusing mechanism, which is different from the embodiment one, the circular rail 4 is connected with the side wall of the mounting groove 21 through the fastener 6, and then only the first guide groove 111 needs to be machined. Embodiment three

[0059] Referring to Figure 4 A focusing mechanism, which is different from the embodiment two, the circular rail 4 and the focusing slide 11 are in an integrated structure, and the two can be manufactured through machining or stretch forming, which is convenient for installation. Embodiment four

[0060] A focusing mechanism, which is different from the embodiment two, the circular rail 4 is connected with the slide rail 11 on both sides through the fastener 6, and then only the second guide groove 26 needs to be machined. Example five

[0061] Referring to Figure 5 A focusing mechanism, which is different from that of example four, is that the circular rail 4 and the sliding rail 11 are integrated, which is convenient for installation. Example six

[0062] A microscope, which comprises a focusing mechanism as any one of examples 1-5.

[0063] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A focusing mechanism, characterized by, Include: The column (1) is provided with a slide rail (11), the surface of the slide rail (11) is provided with a rack (12); The focusing slide (2) is connected with the slide rail (11) and can be lifted up and down relative to the column (1), the focusing slide (2) is provided with a mounting groove (21), and the slide rail (11) is accommodated in the mounting groove (21); The focusing hand wheel (3) comprises a rotating part and a gear shaft (32) connected thereto, the gear shaft (32) is arranged in the focusing slide (2) and can rotate relative to the focusing slide (2), and the gear shaft (32) comprises a gear part (321) engaged with the rack (12); And The circular rail (4) is connected to the side wall of the mounting groove (21), Wherein, the two sides of the slide rail (11) are provided with first guide grooves (111), the circular rail (4) partially extends into the first guide grooves (111), and the groove wall of the first guide grooves (111) is in linear contact sliding connection. The circular rail (4) and the focusing slide (2) are integrated. Include:

2. A focusing mechanism according to claim 1, wherein The column (1) is provided with a slide rail (11), the surface of the slide rail (11) is provided with a rack (12); The focusing slide (2) is connected with the slide rail (11) and can be lifted up and down relative to the column (1), the focusing slide (2) is provided with a mounting groove (21), and the slide rail (11) is accommodated in the mounting groove (21); The focusing hand wheel (3) comprises a rotating part and a gear shaft (32) connected thereto, the gear shaft (32) is arranged in the focusing slide (2) and can rotate relative to the focusing slide (2), and the gear shaft (32) comprises a gear part (321) engaged with the rack (12); And 3. A focusing mechanism characterized by, The circular rail (4) is connected to the two sides of the slide rail (11); Wherein, the focusing slide (2) is provided with second guide grooves (26) on the two side walls in the mounting groove (21), the circular rail (4) partially extends into the second guide grooves (26) and is in linear contact sliding connection with the groove wall of the second guide grooves (26). The circular rail (4) and the slide rail (11) are integrated. Include: The column (1) is provided with a slide rail (11), the surface of the slide rail (11) is provided with a rack (12); The focusing slide (2) is connected with the slide rail (11) and can be lifted up and down relative to the column (1), the focusing slide (2) is provided with a mounting groove (21), and the slide rail (11) is accommodated in the mounting groove (21); The focusing hand wheel (3) comprises a rotating part and a gear shaft (32) connected thereto, the gear shaft (32) is arranged in the focusing slide (2) and can rotate relative to the focusing slide (2), and the gear shaft (32) comprises a gear part (321) engaged with the rack (12); And The circular rail (4) is connected to the focusing slide (2) or the slide rail (11).

4. A focusing mechanism according to claim 3, wherein ​ 5. A focusing mechanism characterized by, ​ ​ ​ ​ ​ The first guide groove (111) has two symmetrically arranged first guide surfaces (112), and the second guide groove (26) has two symmetrically arranged second guide surfaces (261), and the circular rail (4) is in linear contact with the first guide surfaces (112) and the second guide surfaces (261).

6. A focusing mechanism according to claim 5, wherein The focusing slide (2) is provided with at least one through slot (22) which is in communication with the mounting slot (21), and the through slot (22) divides the focusing slide (2) into a main body part (24) and a deformation part (23); the focusing mechanism further comprises an adjusting member (5) which is rotatably connected to the focusing slide (2), and when the adjusting member (5) rotates relative to the focusing slide (2), the deformation part (23) is forced to displace towards the side of the main body part (24) to increase the extrusion force between the focusing slide (2) and the slide rail (11).

7. A focusing mechanism according to any one of claims 1-6, characterized in that The focusing mechanism comprises the focusing mechanism of claim 7.

8. A microscope characterized by, ​

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