RU9072U1 - MICROSCOPE SAFETY STOP - Google Patents

Abstract

A safety stop for the microscope, comprising a coarse feed handle, a clamping handle, a rotary ring with a stop and a torsion cylindrical spring for its rotation, characterized in that an adjustment ring with a stop mounted on the coarse handle and additional cam washers are inserted emphasis of a rotary and adjusting ring.

Description

PRVDRAHRASH1TE11NSh1 STOP FOR MICROSCOPE

The proposed utility model relates to applied mechanics and can be used in optical instrumentation,

Focusing on optical instruments that use optics with a large aperture, such as microscopes, is usually done using fine and coarse feeds.

Since at large apertures of the lenses (more than I) the free distance from the surface of the frontal lens to. plane of the subject is not more than 0.1 - 0.2 mm, then if carelessly performed focusing, damage to the object and lens is possible. Therefore, the focusing process in such cases requires great caution :: prsi; it starts slowly enough.

This circumstance makes it difficult to work with microscopes, especially in mass analyzes, such as blood smears, which use strong microscopic lenses.

To eliminate these shortcomings, emphasis is introduced into the design of the microscopes, which should protect objects and lenses from damage and accelerate the focusing process when changing drugs of the same thickness, due to the fixed position of the object and lens on the optical axis.

Known stops ij, which directly act on the guide of the focusing mechanism. I. the disadvantage is the low accuracy of the installation, due to the small rigid (ty of parts (adjusting screws, racks, etc.,), which does not exceed 0.02 - 0.05 mm. In addition, the focusing drive moves about additional movement1: tzlg : .е details, n;., б & 02В 21/26 Or 02В 7/04

Walking menu guide and control levers. Also, the stops are currently used in serial microscopes manufactured in China, Russia and other countries.

A limiter mechanism gj is also known for a focusing mechanism that is coupled to the drive. But it is made in the form of a separate unit, taken outside the design of the focusing mechanism and will take up extra space.

In instrumentation, a takka known limiter with cam washers fSJ allows you to limit the rotation of the axis after several revolutions. However, it does not allow you to change the position of the stop during operation on the device.

The ability to adjust the position of the stop is necessary, for example, on a microscope when using ordinary slide glasses with a thickness of 0.9 t or more when calculating the number of blood cells using a Goryaev camera, 1-1 having a thickness of b mm, using a tip. with a bottom thickness of 2-3 bm: and in other similar cases.

The closest technology s; -: and repensii of the proposed utility model is the safety stop focusing mechanism of the microscope 4j.

This emphasis is mounted on the rough feed handle. It contains a clamping handle mounted on a threaded ring, a rotary ring with an emphasis, a coarse feed handle on which an emphasis and a prince are mounted.

The well-known safety stop works; in a good way. By turning the handle, the threaded ring is rotated and the rotary ring is released with an emphasis. Under the influence

springs pivoting ring after EUPA-h:; Hereafter, I rested against the stop fixed on the handle of the rough feed. If you rotate the coarse feed handle, the rotary ring and the stop under the action of the spring also turn after the coarse feed handle. Then it is necessary to fasten the rotary ring in the desired position using the handle and the threaded ring. Then the emphasis will serve as a fixed stop for the utensil and, accordingly, the coarse feed handle.

The disadvantages of the known safety stops include:

- the well-known well-known mechanism restricts the rotation of the coarse feed handle to no more than ZBO, since the emphasis fixed to the coarse feed handle rests with Bpai;, eII in the opposite direction of the handle to the stop installed

on the swivel ring.

This fact does not allow the use of a known safety stop in such mechanisms where the coarse feed handle makes several revolutions. And this is how many foku syro-vy mechanisms of modern m-ykrosrsopov work, moving a predecessor table from 2 to 6 mm in one turn of the handle. When changing drugs, ditch, etc. the consumer in such devices usually makes 2-3 turns of the handle.

- Since the emphasis is fixedly mounted on the coarse feed handle, it is difficult to adjust the moment of the spring and the initial position of the microscope’s pre-stage relative to the lens.

The main task, which the utility model is aimed at, is to expand the functional possibilities of .Tti ;,

drug protection to;. iviii :: p: L.i.oria. from damage; k.1;, 8th and upscopic alignment mi1-; grew: (oia.

To solve this problem, a safety stop for a microscope is proposed, which, like the prototype, contains a coarse feed handle, but: the handle is a rotary ring with a stop and a cylindrical spring cr; for rotation.

Unlike the prototype, the proposed safety stop for the microscope further comprises an adjusting ring with a stop, mounted on the coarse feed handle, and cam washers placed by the stops of the rotary and adjusting rings.

The essence of the proposed utility model is: l, due to the introduction of the adjusting ring with the stop and its installation on the coarse feed handle, it is possible to compensate for the difference in the initial focused positions of the microscope, which appears due to inaccurate manufacturing of parts, deviations in the thickness of the glass slides and other for similar reasons, by turning the adjusting ring by the required amount.

The presence of emphasis greatly facilitates the work of the operator during mass laboratory analyzes on a microscope and reduces the likelihood of damage to the preparations and microscope optics "

In addition, the proposed safety stop for the microscope allows you to adjust the position of the sharp image plane depending on the thickness of the glass slide or the bottom of the cuvette, etc.

Thus, the proposed constructive solution of the safety stop expands its functionality, ensures the safety of preparations and microscope optics from

damaging, and also simplifies the alignment of the microscope.

The essence of the proposed utility model is illustrated by the drawing, where Fig. 1 shows a general view of the safety stop for the microscope, and Fig. 2 is a section along AA.

A bearing 2 is mounted on the housing of the focusing mechanism I, in which the coarse feed axis 3 and the coarse feed handle 4 mounted on it rotate. The fine feed axis 5, together with the handle b, is coaxial to the coarse feed handle 4.

An adjusting ring 7 with an emphasis 8 is mounted on the coarse feed handle 4, and a rotary ring 9 with an emphasis 10 is rotated on the bearing 2. The rotation of the rotary ring 9 on the bearing 2 is fixed with the help of the clamping handle II.

Int; - focus 8 of the adjusting ring 7 and focus Yu of the rotary ring 9 are cam washers 12 with projections 13.

The cylindrical spring 14 with the released handle II presses the stop 10 through the tabs 13 of the cam washers 12 to the stop 8 of the adjusting ring 7.

Works safety stop for the microscope as follows.

Before starting the focusing process, turning the clamping knob P releases the rotary ring 9 with a stop 10. Under the action of the spring 14, the rotary ring 9 starts to rotate and the stop 10 engages the protrusions 13 of the cam washers 12. The washers and protrusions abut against the stop 8 mounted on the adjusting ring 7 , Ring 7 is secured by screws 1 AND secured to the coarse feed handle 4.

Setting the safety stop in the flush position is carried out in the following way. Bpai; a; OT coarse feed handle 4 until the microscope is focused on the object. Together with the coarse feed handle 4, the adjusting ring 7, emphasis 8, cam washers 12, emphasis 10 and the rotary ring 9 rotate. After focusing is completed by turning the shutter handle g II, the rotary ring 9 is attached to the torsch-bearing 2. The stop position 10 is also fixed. By rotating the coarse feed handle 4 in the opposite direction, it can make the number of revolutions for which the protrusions of the cam washers 12 are designed. When the coarse feed handle 4 is returned to its initial position, the stops 8 and 10 force the set position, ensuring that obhodiloe focus of the microscope.

Due to inaccuracies in the manufacture of parts, deviations in the thickness of the slides and for other similar reasons, a difference appears in the initial focused positions of the microscope. To compensate, the adjusting ring 7 of the moxet should be turned to the required speed1: rank.

Thus, the proposed utility model provided; It fixes the coarse feed of the microscope in the unsharp position and allows you to compensate for errors in the manufacture of parts. The presence of an emphasis greatly facilitates the work of the operator in mass laboratory analyzes on a microscope and reduces the likelihood of damage to the preparations and microscope optics.

SOURCE: INSURANCE

1, Application of Germany F 05 3802850, ШК: 02В 7/04; In 21/26, 1988

2. U.S. Patent No. 4,155,623, IPC: G 02B 21/26, 1979.

3.G.A. Vernovkch, E.N.GolevenkRP- and others. Handbook of design engineering and precision instrument engineering. L .: Engineering, 1989,

p. 444, fig. 8L5

4, Japanese application 1 55-10163, IPC: G 02B 7/04, 1980 - prototype.

Claims (1)

A safety stop for the microscope, comprising a coarse feed handle, a clamping handle, a rotary ring with a stop and a torsion cylindrical spring for its rotation, characterized in that an additional adjusting ring with a stop mounted on the coarse handle and cam washers placed between emphasis of a rotary and adjusting ring.