JPS6041532Y2 - Eyepiece with diopter correction - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an eyepiece lens with diopter correction.

The eyepiece can be found, for example, in a microscope eyepiece.

To explain such an eyepiece in detail with reference to FIG. 1, a female screw 2a provided on the fitting member 2 with the lens barrel and a male screw 4a provided on the lens holding member 4 holding the lenses 1 and 3. They are screwed together, and the lens holding member 4 moves in the axial direction while rotating.

At this time, in order for the lens holding member 4 to move smoothly in the axial direction, a certain amount of clearance is required between the female screw 2a and the male screw 4a.

However, depending on the size of the clearance between the female screw 2a and the male screw 4a, the lenses 1 and 3 become eccentric or tilted with respect to the optical axis of the microscope, which adversely affects the performance of the microscope. There was a drawback that it could be stored away.

On the other hand, machining was difficult for parts with no clearance, eccentricity, or inclination.

As a solution to these drawbacks, Japanese Patent Application Laid-open No. 54-10
There is a device disclosed in No. 0758.

In other words, this device defines the radial positional relationship between two cylinders (inner cylinder, middle cylinder) by cylindrical fitting.
Although a feeding mechanism is disclosed in which the radial displacement of the two cylinders does not depend on the clearance of the screw, the relative movement in the axial direction of the two cylinders is caused by the movement between the outer cylinder and the middle cylinder, which are integral with the inner cylinder. Since this is carried out using screws, there is a drawback in that the movement in the axial direction lacks quickness.

In order to solve this problem, a feeding device can be considered that not only does not displace the two cylinders in the radial direction, but also increases the speed of movement in the axial direction.

FIG. 2 is a cross-sectional view of an example that further achieves this purpose, and FIG. 3 is a cross-sectional view taken along the line A--A in FIG.

The lens holding member 14 that holds the lenses 11 and 13 is an inner cylinder, and is slidably cylindrically fitted on the inner surface of the fitting member 12, which is a middle cylinder.

The outer cylinder 15 is integrated with the lens holding member 14 by screwing, and is housed in a pin 15C1 that rotatably fixes the knob 15b to the knob 15a having a protrusion 15a1 and a coupling part 15b'. Spring 1
It has 5d.

In a normal state, that is, when no force is applied to the pressing portion 15b'' of the knob 15b, the coupling portion 12b' is in frictional contact with the fitting member 12, and the holding member 14, outer cylinder 15, knob 15b, etc. are fitted together. It is immovable relative to the member 12 in the axial direction.

However, when a force is applied to the pressing portion 15b'', the knob 15b rotates around the pin 15c, the coupling portion 15b' separates from the fitting member 12, and the holding member 14 etc. become movable.

If the pressing force is released after moving the holding member 14 etc. to a predetermined position, the holding member 12 etc. will be set at that position.

With this structure, the lenses 11 and 13 are almost never eccentric or tilted with respect to the optical axis of the microscope, and even if they are, the cylindrical fit between the fitting member 12 and the lens holding member 14 is It just depends on the accuracy error.

Next, another example will be explained using FIG.

Since this structure is almost the same as that in FIG. 2, the same parts are given the same symbols and detailed explanation will be omitted.

The features include a male screw 12'a provided on the outer surface of the fitting member 12' to the lens barrel, and a protrusion 15b of the knob 15b.
A female screw is provided at the tip of '.

In this way, it is possible to securely fix the axial movement of the lens holding member 14, and if the pitch of the screw is appropriately selected, the axial movement of the lens holding member 14 can be approximately adjusted by the pressing portion 15b of the knob 15b. This can be done by sliding the screws by pinching them to disengage the screws, while fine adjustment can be made by rotating the outer cylinder 15 relative to the fitting member 12' while the screws are still engaged.

For example, in the case of a magnifying eyepiece, the thread pitch should be 0.3T.
With IrIIt, one pitch corresponds to about 0.5 dayopter, so rough adjustment can be made with an accuracy of about 0.5 dayopter.

If you use a multi-thread screw rather than just a single-thread screw, you can select an appropriate value for the sensitivity during fine adjustment.

The example shown in FIG. 4 described above has the advantage that it is easier to make fine adjustments compared to the examples shown in FIGS. 2 and 3, but it has the disadvantage that the members for switching between fine adjustment and coarse adjustment are complicated. have.

The present invention solves the above-mentioned drawbacks, namely, provides an eyepiece with diopter correction that has a simple structure, which not only eliminates the radial displacement of the two cylinders, but also increases the speed of axial movement. The purpose is to

An embodiment of the present invention will be described using FIG. 5, FIG. 6, and FIG. 7.

The same parts as in the example shown in FIGS. 2 and 3 are indicated by the same symbols.

The outer cylinder 15 is made of a material such as polyamide, polyacetal, or polyarylate that can be elastically deformed by itself, and is partially provided with female screws 15b' and 15b at two opposing positions on the inner peripheral surface.
' is provided, and is screw-fitted with a male screw 12'a provided on the outer surface of the fitting member 12'.

A female screw 15b' is provided on the outer peripheral surface of the outer cylinder 15. 15b' and 9
Knobs 15b", 15b" are provided at positions separated by 0° (FIG. 6).

When moving the lens holding member 14 in the axial direction, the general adjustment is made by manually pushing the knobs 15b'', 15b'' to deform the outer tube 15, and tightening the female screws 15b', 15b', as shown in FIG.
This is done by removing the screw fitting between 15b' and male screw 12'a and sliding them.

If you release your hands from the knobs 15b", 15b", the outer cylinder 15
returns to its original shape by its own elastic force.

To fine-tune the movement in the axial direction, adjust the outer cylinder 1 while the screws are engaged.
5 relative to the mating member 12'.

In FIG. 8, the female thread is made of an oval shape instead of the partial female thread in FIG. 6, and the parts 15b' and 15b' of the thread are
This usually indicates a screw fit.

Here, the male screw 12'a and female screw 1 of the fitting member
If 5b' and 15b' are provided with annular ridges of equal pitch instead of screws, a feeding device that can only be roughly adjusted can be obtained.

As described above, according to the present invention, there is not only no radial displacement between the inner cylinder and the middle cylinder, but also a diopter with a simple structure that increases the speed of relative movement in the axial direction. A corrected eyepiece can be obtained.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional eyepiece with diopter correction used in microscope eyepieces.
The figure is a cross-sectional view of an improved example of the conventional example, FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2, and FIG. 4 is a cross-sectional view of yet another improved example of the conventional example. Fig. 5 is a sectional view of the first embodiment of the present invention, Fig. 6 is a sectional view taken along line BB in Fig. 5, Fig. 7 is an explanatory diagram of its operation, and Fig. 8 is a sectional view of the second embodiment of the invention. FIG. Explanation of the symbols of the main parts, 11, 13...Luns,
12... Fitting member (middle cylinder), 14...
- Luns holding member (inner cylinder), 15...outer cylinder.

Claims (1)

[Claims for Utility Model Registration] 1. A middle cylinder is arranged around an inner cylinder holding a lens, and an outer cylinder made of an elastically deformable material is arranged around the middle cylinder, and the inner cylinder and the outer cylinder and a connecting means for integrally connecting the inner cylinder and the middle cylinder near their ends, the inner cylinder and the middle cylinder are cylindrically fitted, and the inner cylinder and the outer cylinder are always screwed together, A male screw and a female screw are provided that are unthreaded due to elastic deformation of the outer cylinder due to an external force, and the inner cylinder is moved relative to the inner cylinder and the outer cylinder in the axial direction. Eyepiece lens with diopter correction. 2 A male thread is formed on the entire outer peripheral surface of the inner cylinder, and a pair of female threads that can be screwed into the male thread are formed on the inner peripheral surface of the outer cylinder at diametrically opposing portions. The eyepiece with diopter correction according to claim 1, wherein the external force is applied radially inward to the outer circumferential surface of a portion of the outer cylinder located between the female screws. lens. 3. A male thread is formed on the entire outer peripheral surface of the middle cylinder, and the outer cylinder has a hollow elliptical shape, and a female thread is formed on the entire inner peripheral surface, and the male thread is formed on the entire inner peripheral surface of the outer cylinder. The eyepiece lens with diopter correction according to claim 1, which is a registered utility model and is screwed into a side screw, and the external force is applied inward to the outer circumferential surface of the portion with a large curvature.