JPH11119112A - Objective converting mechanism of stereomicroscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an objective converting mechanism of a stereomicroscope capable of preventing the inclination of an objective lens and hardly affected by the influence of vibration. SOLUTION: In an objective converting mechanism of a stereomicroscope provided with a mounting seat 21 fixed to the lower surface of a lens barrel, an objective seat 22 freely rotatably attached to the mounting seat 21 by means of a rotating shaft 23 and a clicking mechanism 18 for controlling the rotational position of the objective seat 22, an objective seat pressing part 21b abutting one end of the objective seat 22 on one end of the mounting seat 21 and constituted so that the objective seat 22 is abutted on the objective seat pressing part 21b by means of the elastic force of the clicking mechanism 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an objective conversion mechanism for a stereomicroscope.

[0002]

2. Description of the Related Art A conventional objective conversion mechanism of a stereomicroscope converts a plurality of objective lenses into objective lenses having different magnifications by mounting a plurality of objective lenses on an objective seat and rotating the objective seat about a rotation axis. . This objective conversion mechanism will be described with reference to FIG. Objective lenses 101, 1 having different magnifications
01 ′ is attached to the objective 102,
Is rotatably supported on a mounting seat 104 by a rotating shaft 103. A click mechanism 105 is attached to one end of the mounting seat 104, and a click roller 108 of the click mechanism 105 is fitted into a click groove (not shown) of the objective seat 102, thereby determining the position of the objective seat 102 in the rotation direction. . The click mechanism 105 includes a click roller 10 inside a click spring 106 formed of a U-shaped leaf spring.
8 is configured to be rotatably supported by a click shaft 107.

[0003]

However, the above prior art has the following problems. Since the objective seat is supported by the rotating shaft, when only one objective lens is attached, its own weight causes it, and when two objective lenses are attached, it turns the rotating shaft due to the weight difference between the two objective lenses. As a result, the original optical axis m of the objective lens is inclined as m 'as shown in FIG. Since the resilience of the click spring of the click mechanism acts in a direction perpendicular to the optical axis of the optical system of the mirror body, the above-mentioned inclination cannot be suppressed. In addition, the objective lens used when observing with a stereomicroscope is easily affected by vibration because the objective seat has a cantilever structure with the rotation axis as a fulcrum,
This was an obstacle to increasing the magnification of the stereomicroscope.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention according to claims 1, 2 and 3 is to prevent the objective lens from being tilted and to be hardly affected by vibration. It is to provide a microscope objective conversion mechanism.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1, 2 or 3 has a mounting seat fixed to the lower surface of the mirror body, and the mounting seat is rotatable by a rotating shaft. In an objective conversion mechanism of a stereomicroscope having an attached objective seat and a click mechanism for controlling a rotation position of the objective seat, an objective seat pressing portion for abutting one end of the objective seat on one end of the mounting seat is provided. The object seat is configured to be pressed by the object seat pressing portion by a resilient force of the click mechanism.

According to the operation of the first, second or third aspect of the present invention, an object seat pressing portion for contacting one end of the object seat with one end of the mounting seat is provided, and the object seat is moved by the resilience of a click mechanism. By being configured to be pressed by the pressing portion, the objective seat is stopped and fixed in parallel with the mounting seat. In the operation of the invention according to claim 2, in addition to the above operation, the object seat pressing portion is provided at one end of the lower surface of the mounting seat, and the pressing force of the click mechanism acts downward at the other end of the mounting seat. With this configuration, the repulsive force of the click mechanism presses the object seat downward with the rotation axis as a fulcrum, and the upper surface of the object seat is pressed against the object seat pressing portion of the mounting seat with the rotation axis as a fulcrum. Claim 3
In the operation of the invention according to the present invention, in addition to the above operation, the objective seat pressing portion is provided on the upper surface of the lateral groove at one end of the mounting seat, and the resilient force of the click mechanism acts upward at the other end of the mounting seat. With this configuration, the repulsive force of the click mechanism presses the object seat upward with the rotation axis as a fulcrum, and the lower surface of the object seat is pressed with the rotation axis as a fulcrum against the upper surface of the lateral groove of the mounting seat.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments will be described below. (Embodiment 1) FIGS. 1 to 3 show Embodiment 1, FIG. 1 is a side view of a stereomicroscope, FIG. 2 is a side view of an objective conversion mechanism, and FIG. 3 is a bird's-eye view of the objective conversion mechanism.

In FIG. 1, a stereo microscope includes a gantry 10
A strut 11 is erected, and a focusing portion 12 is attached to the strut 11. A mirror 13 is attached to the focusing unit 12 so as to be vertically movable. The mirror body 13 is provided with a focusing handle 14. By rotating the focusing handle 14, the mirror body 13 is driven up and down to perform a focusing operation. The mirror 13
Is provided with a zoom handle 15, which can be rotated to move a lens of a zoom optical system (not shown) built in the mirror body 13 to perform a zoom operation. A binocular tube 16 having a built-in eyepiece (not shown) is mounted on the upper surface of the mirror body 13.

An objective conversion mechanism 20 to which objective lenses 17 and 17 'having different magnifications are mounted is fixed to the lower surface of the mirror body 13. As shown in FIG.
Has a mounting seat 21, which is fixed to the lower surface of the lens body 13. Object seat mounting surface 21a of mounting seat 21
, The object seat 22 is supported by a rotating shaft 23, and can rotate about the rotating shaft 23 as a center of rotation. Also,
At one end of the mounting seat 21, an objective seat pressing portion 21b slightly protruding from the objective seat mounting surface 21a is formed. further,
A click spring 2 made of a leaf spring is provided at the other end of the mounting seat 21.
A click roller 25 is rotatably supported at the tip of the click spring 24 by a click shaft 26 whose axis is perpendicular to the axis of the rotation shaft 23.

As shown in FIG. 3, slopes 27a, 27b, 27c and 27 are provided at both ends in the longitudinal direction of the upper surface of the object seat 22 so that the click roller 25 can climb smoothly.
d is engraved in four places. Further, a contact surface 28 that comes into contact with the object seat pressing portion 21b of the mounting seat 21 is provided between them.
a, 28b, 28c, 28d and click grooves 29a, 29b into which the click roller 25 fits are formed. The click mechanism 24 is configured by the click spring 24, the click roller 25, the click shaft 26, and the click grooves 29a and 29b. 2, when the click roller 25 is fitted into the click groove 29a by the click mechanism 18 and presses the object seat 22 downward, the rotation shaft contact surface 22a of the object seat 22 and the object seat support of the rotation shaft 23 are rotated. The abutment surface 23a contacts the abutment surface 28c and the abutment surfaces 28c and 28d of the objective seat 22.
b and press against each other. In this state,
The objective seat 22 is positioned parallel to the mounting seat 21, and the optical axis m of the objective lens 17 is configured to be coincident with the optical axis n of the mirror body 13 (see FIG. 1) without being inclined.
The same applies when the click roller 25 is fitted in the click groove 29b.

Next, a method of converting an objective lens using the objective conversion mechanism 20 will be described. First, from the state of FIG. 2, the object seat 22 on which the objective lenses 17 and 17 'are mounted is shown.
Is rotated clockwise (in the direction of arrow θ in FIG. 3) when viewed from above by hand, and the click roller 25
As shown in FIG. 3, the click roller 25 is in a free state by slipping off the contact surface 9a and the contact surface 28b and the slope 27b. When the rotation is further continued, the slope 27d starts to contact the click roller 25, and the click spring 24
The click groove 29b is fitted by sliding on the contact surface 28d while resisting the resilience. At this time, the contact surfaces 28a and 28b on both sides of the click groove 29a come into contact with the objective seat pressing portion 21b of the mounting seat 21 and are pressed by the resilient force of the click spring 24, so that the objective seat 22 is parallel to the mounting seat 21. Is positioned. Thus, the objective lens 17 'is positioned at the position of the previous objective lens 17, and the conversion operation is completed. At this time, the optical axis m 'of the objective lens 17' matches the optical axis n of the mirror 13.

According to this embodiment, the objective seat on which the objective lens is mounted is positioned parallel to the mounting seat by the resilience of the click mechanism, and is positioned at a position perpendicular to the optical axis of the optical system of the mirror body. Since it is fixed, it is possible to prevent the objective lens from being tilted and to be less susceptible to vibration. This eliminates variations in the appearance of the image due to the weight of each objective and the weight difference from the counterpart objective, and enables the use of a higher-magnification objective lens.

In the present embodiment, a click roller is used for the click mechanism. However, if the resilience of the click spring acts in parallel with the optical axis of the optical system of the mirror body, a click ball or a cone is used. A click-shaped plunger may be operated. Further, in this embodiment, a case where two objective lenses are mounted on the objective seat is described.
The present embodiment can be applied even when three or more objective lenses are mounted.

(Embodiment 2) FIGS. 4 and 5 show Embodiment 2, FIG. 4 is a side view of an objective conversion mechanism, and FIG. 5 is a bottom view of the objective conversion mechanism. The second embodiment differs from the first embodiment only in the mounting seat of the objective conversion mechanism, and the other configuration is the same as that of the first embodiment. Therefore, only different portions are shown, and drawings and descriptions of the same portions are omitted. 4 and 5, the same members are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 4, the objective conversion mechanism 30 has a mounting seat 31, which is fixed to the lower surface of the lens body 13. The objective seat 22 is supported by a rotating shaft 23 on the objective seat mounting surface 31a of the mounting seat 31, and can rotate about the rotating shaft 23 as a rotation center. As shown in FIG. 5, one end of the mounting seat 31 has an objective seat mounting surface 31a.
Pads 32A and 32B as attachment seat pressing portions are adhered so as to protrude slightly more. Other configurations are the same as those of the first embodiment.

The method of converting the objective lens using the objective conversion mechanism 30 is the same as that of the first embodiment, and therefore the description is omitted.

According to the present embodiment, in addition to the same effects as those of the first embodiment, the mounting of the mounting seat is facilitated because the pad is adhered as the mounting seat pressing portion. Further, the step with the object seat mounting surface can be freely selected by exchanging the pads.

The modification shown in the first embodiment can be applied to the present embodiment.

(Embodiment 3) FIG. 6 shows Embodiment 3 and is a side view of an objective conversion mechanism. In the third embodiment,
Only the mounting seat of the objective conversion mechanism is different from that of the first embodiment, and the other configuration is the same as that of the first embodiment. Therefore, only different portions are shown, and drawings and descriptions of the same portions are omitted. Also, in FIG. 6, the same members are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 6, the objective conversion mechanism 40 has a mounting seat 41, which is fixed to the lower surface of the lens body 13. The objective seat 22 is supported by a rotating shaft 23 on the objective seat mounting surface 41a of the mounting seat 41, and can rotate about the rotating shaft 23 as a rotation center. At one end of the mounting seat 41, a rotating body 42 is rotatably mounted around a shaft 43 as a rotation center. The tip of the rotating body 42 slightly protrudes from the objective seat mounting surface 41a, and the contact surface 28c of the objective seat 22,
The object seat 22 is configured to be parallel to the mounting seat 41 when 28 d (not shown) comes into contact. FIG.
When the objective 41 is stopped by the click mechanism 18, the position of the rotary
The two contact surfaces 28a and 28b (not shown) or the contact surfaces 28c and 28d (not shown) are provided at two positions where they can make contact. In the present embodiment, the rotating body 42 and the shaft 4
3 constitutes an objective seat pressing portion. Other configurations are the same as those of the first embodiment.

The method of converting an objective lens using the objective conversion mechanism 40 is the same as that of the first embodiment, and a description thereof will be omitted. However, in the first embodiment, the object seat pressing portion 21b
However, in the second embodiment, the pads 32A, 32B
However, both of them come into sliding contact with the contact surfaces 28a and 28b or the contact surfaces 28c and 28d of the objective seat, whereas the rotating body 42 of the present embodiment comes into rolling contact.

According to the present embodiment, in addition to the same effect as in the first embodiment, since the frictional resistance is reduced by the rolling contact of the rotating body, the conversion operation of the objective lens can be performed smoothly.

The modification shown in the first embodiment can be applied to the present embodiment.

(Embodiment 4) FIG. 7 shows Embodiment 4 and is a side view of an objective conversion mechanism. In the third embodiment,
Only the mounting seat and the click mechanism of the objective conversion mechanism are different from those of the first embodiment, and the other components are the same as those of the first embodiment. Also, in FIG. 7, the same members are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 7, the objective conversion mechanism 50 has a mounting seat 51, which is fixed to the lower surface of the lens body 13. The objective seat 52 is supported by the rotary shaft 23 on the objective seat mounting surface 51a of the mounting seat 51, and can rotate about the rotary shaft 23 as a rotation center. In addition, mounting seat 5
A U-shaped lateral groove 55 is vertically provided at one end of the groove 1, and a pad 56 is attached to the upper surface of the lateral groove 55. Horizontal groove 55
Is set to be wider than the thickness of the objective seat 52 by the thickness of the pad 56 or more. Further, the mounting seat 51
A click spring 54 made of a leaf spring is attached to the other end of the click spring 54, and a lower end of the click spring 54 is provided with a click shaft 26 whose axis is perpendicular to the axis of the rotation shaft 23.
The click roller 25 is rotatably supported. Click grooves 29a and 29b are formed on both ends of the lower surface of the objective seat 52, similarly to the objective seat 22 of the first embodiment.

Further, a slope (not shown) and a contact surface (not shown) are formed on the lower surface corresponding to a position symmetrical to the upper surface of the objective 22 of the first embodiment. The above-mentioned click spring 54, click roller 25, click shaft 26, click grooves 29a, 29
b constitutes a click mechanism 19. In FIG. 7, the click mechanism 19 causes the click roller 2 to move.
When the object 5 is fitted into the click groove 29a and the object seat 52 is pressed upward, the mounting seat contact surface 52b around the rotation shaft 23 of the object seat 52 and the object seat contact surface 51a of the mounting seat 51 come into contact with each other. At the same time, the two contact surfaces (not shown) of the object seat 52 come into contact with the pads 56 of the mounting seat 51 and press against each other. In this state, the objective seat 52 is positioned parallel to the mounting seat 51, and the optical axis m of the objective lens 17 is aligned with the optical axis n of the mirror body 13 (see FIG. 1) without being inclined. Have been. The same applies when the click roller 25 is fitted in the click groove 29b. Other configurations are the same as those of the first embodiment.

Next, a method of converting an objective lens using the objective conversion mechanism 50 will be described. First, from the state of FIG. 7, the object seat 22 on which the objective lenses 17 and 17 'are mounted is shown.
Is rotated clockwise as viewed from above by hand, the click roller 25 is disengaged from the click groove 29a and slides on a contact surface (not shown) and a slope, so that the click roller 25 is in a free state. When the rotation is further continued, the next slope (not shown) starts to contact the click roller 25,
The click groove 29b is fitted by sliding on a contact surface (not shown) while resisting the elastic force of the click spring 54. At this time, the click roller 25 pushes the objective seat 52 upward, and the contact surfaces (not shown) on both sides of the click groove 29 a of the objective seat 52, which is lowered to the left with the rotation shaft 23 as a fulcrum, The objective seat 52 is positioned parallel to the mounting seat 51 by contacting the pad 56 attached to the upper surface of the lateral groove 55. Thus, the objective lens 17 'is positioned at the position of the previous objective lens 17, and the conversion operation is completed. At this time, the optical axis m 'of the objective lens 17' matches the optical axis n of the mirror body 13 (see FIG. 1).

According to the present embodiment, the same effect as in the first embodiment can be obtained even if the click groove and the contact surface are provided on the lower surface of the objective seat.

The modification shown in the first embodiment can be applied to the present embodiment.

The technical idea having the following configuration is derived from the above specific embodiment. (Supplementary note) (1) In the click mechanism of the rotary revolver of the stereomicroscope, the objective seat on which the objective lens is mounted is replaced with a rolling element that exerts an elastic force in parallel with the optical axis direction, and a rotating shaft that supports the objective seat.
A click mechanism for a rotary revolver of a stereomicroscope, wherein the click mechanism is configured to be supported at three points with respect to the rotating shaft and an object seat pressing portion provided on a side opposite to the rolling element. By supporting the objective seat with the objective lens at three points, the optical axis of the objective lens is aligned with the optical axis of the mirror body and its position is fixed, so that the tilt of the objective lens is prevented and the influence of vibration Can be hard to receive. (2) In the click mechanism of the rotary revolver of the stereomicroscope, the objective seat on which the objective lens is mounted is replaced with a rolling element that exerts a resilient force parallel to the optical axis direction, and a rotating shaft that supports the objective seat.
A click mechanism for a rotary revolver of a stereomicroscope, wherein the click mechanism is configured to be supported at three points with respect to the rotation axis and a pad provided on a side opposite to the rolling element. In addition to the effect of (1), the manufacture of the rotary revolver can be facilitated. (3) In the click mechanism of the rotary revolver of the stereomicroscope, the objective seat on which the objective lens is mounted is replaced with a rolling element that exerts a resilient force parallel to the optical axis direction, and a rotating shaft that supports the objective seat.
A click mechanism for a rotary revolver of a stereomicroscope, wherein the click mechanism is configured to be supported at three points with respect to the rotating shaft and a rotating body provided on a side opposite to the rolling element. In addition to the effect of (1), since the rotating body and the mounting seat are in rolling contact, the rotational movement of the rotary revolver is performed smoothly.

[0031]

According to the first, second or third aspect of the present invention, the objective seat is stopped and fixed in parallel with the mounting seat, so that the tilt of the objective lens is prevented and the objective hardly affected by vibration. A conversion mechanism can be obtained. According to the second aspect of the present invention, in addition to the above effects, the resilient force of the click mechanism presses the object seat downward with the rotation axis as a fulcrum, and the upper surface of the object seat uses the rotation axis as a fulcrum to mount the object seat. Since the object seat is pressed by the pressing portion, the objective seat can be stopped and fixed in parallel with the mounting seat with a simple configuration. According to the third aspect of the invention, the repulsive force of the click mechanism presses the object seat upward with the rotation axis as a fulcrum, and the lower surface of the object seat is pressed with the rotation axis as a fulcrum against the upper surface of the lateral groove of the mounting seat. Therefore, even with a structure in which the click groove and the contact surface are provided on the lower surface of the objective seat, it is possible to prevent the objective lens from being tilted and to obtain an objective conversion mechanism that is hardly affected by vibration.

[Brief description of the drawings]

FIG. 1 is a side view of a stereo microscope according to a first embodiment.

FIG. 2 is a side view of the objective conversion mechanism according to the first embodiment.

FIG. 3 is a bird's-eye view of the objective conversion mechanism according to the first embodiment;

FIG. 4 is a side view of an objective conversion mechanism according to a second embodiment.

FIG. 5 is a bottom view of the objective conversion mechanism according to the second embodiment.

FIG. 6 is a side view of the objective conversion mechanism according to the third embodiment.

FIG. 7 is a side view of an objective conversion mechanism according to a fourth embodiment.

FIG. 8 is a side view of a conventional objective conversion mechanism.

[Explanation of symbols]

 18 Click mechanism 21 Mounting seat 21b Object seat pressing part 22 Object seat 23 Rotation axis

Claims (3)

[Claims] 1. A stereo microscope comprising a mounting seat fixed to a lower surface of a mirror body, an objective seat rotatably mounted on the mounting seat by a rotation shaft, and a click mechanism for controlling a rotation position of the objective seat. In the objective conversion mechanism of (1), an object seat pressing portion for contacting one end of the object seat with one end of the mounting seat is provided, and the object seat is pressed by the object seat pressing portion by the resilient force of the click mechanism. An objective conversion mechanism for a stereo microscope, characterized in that it is configured. 2. The object seat pressing portion is provided at one end of a lower surface of the mounting seat, and the resilient force of the click mechanism acts downward at the other end of the mounting seat. The objective conversion mechanism for a stereo microscope according to claim 1. 3. The object seat pressing portion is provided on an upper surface of a lateral groove at one end of the mounting seat, and the resilient force of the click mechanism acts upward at the other end of the mounting seat. The objective conversion mechanism of a stereo microscope according to claim 1, wherein: