JPH11174340A - Focusing device of microscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive focusing device of a microscope which does not require the labor in assembly without increasing the number of parts. SOLUTION: This focusing device of a microscope is equipped with a support 10, a microscope holder 20, an up-and-down moving member 30 fixed on the holder 20 and moving up and down along the support 10, a rack 40 provided on the member 30, a rotary shaft 50 rotatably provided in the support 10, and a pinion 51 provided on the shaft 50 and meshing with the rack 40; and is equipped with guide grooves 12 and 13 formed in the up-and-down direction on the support 10, projecting parts 31 and 32 provided on the member 30 and inserted to slide in the grooves 12 and 13, and a backlash restraining means restraining backlash between the grooves 12 and 13 and projecting parts 31 and 32. The member 30 is integrally molded with the projecting parts 31 and 32 and the rack 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a focusing device for a microscope, and more particularly to a focusing device for a microscope such as a stereo microscope.

[0002]

2. Description of the Related Art FIG. 3 is a side view of a stereomicroscope provided with a conventional microscope focusing device.

A stereo microscope includes a base 105 and a base 1
A support 110 provided upright at one end of the support 05 and a support 11
The microscope includes a microscope holder 120 that moves up and down along 0, a microscope main body 121 attached to the microscope holder 120, and a handle 111 that moves the microscope holder 120 up and down.

Since the microscope main body 121 itself does not have a focusing function, observation by the stereoscopic microscope is performed by operating a handle 111 provided on the side surface of the support 110.
The microscope body 121 is focused on an object to be observed placed on the base 105 by moving the microscope 0 up and down.

FIG. 4 is a sectional view taken along the line IV-IV in FIG.

[0006] The focusing device of the microscope includes a column 110, a microscope holder 120, a vertically moving member 130, and a rack 140.
, A rotation shaft 150 and a pinion 151.

A microscope holder 120 is attached to one end surface of the vertically moving member 130 with screws (not shown), and a rack 140 is attached to the other end surface with screws (not shown).

Further, rectangular guide grooves 131 and 132 extending in the vertical direction are provided on both longitudinal end surfaces of the vertical moving member 130.
Are formed respectively.

A pinion 151 meshing with the rack 140 is formed at the center of the rotary shaft 150, and handles 111 are attached to both ends of the rotary shaft 150, respectively.
The rotating shaft 150 is supported by a support 1 having a C-shaped cross section via a bearing 117.
10 is provided rotatably.

A guide member 1 having rectangular guide grooves 181 and 182 extending in the vertical direction at the open end of the support 110.
80A and 180B are respectively attached.

The guide grooves 131 and 181 and the guide grooves 132 and 182 are arranged to face each other.

Guide grooves 131, 132, 181, 182
Races 131a, 132 each having a substantially triangular cross section
a, 181a, 182a are arranged, and the race 131a,
A plurality of balls 191 and 192 are mounted between the 181a and the races 132a and 182a, respectively.

The races 131a and 181a and the ball 19
1. The races 132a and 182a and the ball 192 each constitute a ball race mechanism. The ball race mechanism moves the vertically moving member 130 by the rolling motion between the races 131a and 181a and the ball 191 and between the races 132a and 182a and the ball 192 by the rolling motion.
80B (support 110) so as to be vertically movable.

When the handle 111 is operated, the rotating shaft 1
50 rotates, and this rotational force is transmitted to the vertically moving member 130 via the pinion 151 and the rack 140. The vertically moving member 130 moves up and down along the ball race mechanism, and the microscope main body 121 attached to the microscope holder 120 moves up and down along the column 110.

[0015]

However, the focusing device of the microscope is composed of many parts as described above, and the assembling of the balls 191 and 192 between the races 131a and 181a and between the races 132a and 182a, etc. Since this is a laborious operation, there is a problem that a lot of time is required for assembling and the manufacturing cost is increased.

Further, even after assembling, the engagement portion between the ball race mechanism and the rack 140 and the pinion 151 is in contact with metal, so that it is liable to wear or the like, requires oiling, and takes time and labor to maintain the device. There's a problem.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide an inexpensive microscope focusing device which does not increase the number of parts and does not require assembling.

[0018]

According to a first aspect of the present invention, there is provided a support, a microscope mounting member,
A movable member fixed to the microscope mounting member and moving up and down along the column, a rack provided on the movable member, a rotation shaft rotatably provided on the column, and a rotation shaft provided on the rotation shaft. A focusing device for a microscope comprising a pinion meshing with the rack, a guide groove formed in the support column in a vertical direction, and a convex portion provided on the movable member and slidably inserted into the guide groove. And a play suppressing means for suppressing play between the guide groove and the convex portion, wherein the movable member is integrally molded with the convex portion and the rack.

A guide groove formed in the support column in a vertical direction;
A protrusion provided on the movable member and slidably inserted into the guide groove, and a play suppressing means for suppressing backlash between the guide groove and the protrusion are provided, and the movable member is integrally formed with the protrusion and the rack. Molding reduces the number of parts,
In addition, there is no need for assembling.

According to a second aspect of the present invention, in the focusing apparatus for a microscope according to the first aspect, the movable member, the convex portion, and the rack are formed of a resin material.

Since the movable member, the convex portion and the rack are formed of a resin material, the convex portion can be slid along the guide groove without a ball race mechanism, and the work of processing the rack can be omitted. .

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view of a stereomicroscope provided with a microscope focusing device according to an embodiment of the present invention.

The stereo microscope includes a base 5, a support 10,
Microscope holder (microscope mounting member) 20 and microscope main body 2
1 and a handle 11.

The column 10 is attached to one end of the base 5 at an angle of about 90 ° with respect to the base 5.

The handle 11 is provided on a side surface of the column 10, and the microscope holder 20 is moved up and down by operating the handle 11.

The microscope main body 21 is attached to the microscope holder 20 and moves up and down together with the microscope holder 20.

FIG. 2 is a sectional view taken along the line II-II of FIG.

The focusing device of the microscope includes a column 10, a microscope holder 20, a vertically movable member (movable member) 30, a rack 40, a rotating shaft 50, and a pinion 51.

Projections 31 and 32 are formed on both end surfaces in the longitudinal direction of the vertically moving member 30, respectively.

The vertically moving member 30, the convex portions 31, 32, and the rack 40 are integrally formed of a resin material, and the microscope holder 20 is attached to the vertically moving member 30 by screws (not shown). In addition, as the resin, for example, polyacetal having a dynamic friction coefficient with respect to metal of 0.3 or less is used.

The column 10 has a C-shaped cross section, and the guide groove 1 into which the convex portions 31 and 32 are inserted is formed at the opening end.
2 and 13 are formed in the vertical direction, and the guide groove 1 is formed.
Three internal threads 14 to 16 are formed which communicate with the female threads 2 and 13.

Each of the guide grooves 12 and 13 has a projection 31 or 3
2, a pressing member 61 having an I-shaped cross section and a pressing member 62 having an L-shaped cross section are inserted.

The female screw 14 is provided with a male screw 71 and the female screw 15
, A pressing member 61 having an I-shaped cross section and a pressing member 62 having an L-shaped cross section are pressed in the direction of arrow a to press the vertically moving member 30 against the side surfaces of the guide grooves 12 and 13.

A male screw 73 is screwed into the female screw 16.
The vertically moving member 30 is pressed against the side surface of the guide groove 12 by pressing the pressing member 62 having the shape cross section in the direction of the arrow b.

The pressing members 61 and 62 and the male screws 71 to 7
3 constitutes a play suppressing means for suppressing the play between the guide grooves 12, 13 and the convex portions 31, 32.

A rotating shaft 50 is rotatably attached to the support 10 via a bearing 17.

A pinion 51 that meshes with the rack 40 is formed at the center of the rotating shaft 50, and handles 11 for rotating the rotating shaft 50 are attached to both ends.

Next, the operation of the focusing device of the microscope will be described with reference to FIGS.

When the handle 11 is operated, the rotating shaft 50 rotates, and this rotating force is transmitted to the vertically moving member 30 via the pinion 51 and the rack 40. The vertically moving member 30 slides along the guide grooves 12 and 13 to move the microscope main body 21 held by the microscope holder 20 up and down. Therefore, the object to be observed placed on the base 5 is attached to the microscope main body 21.
Can be focused.

According to the above embodiment, the number of parts can be reduced, and since there is no ball lace mechanism as in the conventional example, there is no trouble in assembling, and the assembling time can be shortened. Can be manufactured at low cost.

Also, without using the ball race mechanism, the convex portions 31 and 32 and the rack 40 have a kinetic coefficient of friction against metal of 0.3.
Since it is formed of the following resin, the resin material and the metal come into contact with each other, and it is not necessary to lubricate the sliding portion between the guide grooves 12, 13 and the convex portions 31, 32 and the meshing portion between the rack 40 and the pinion 51. The maintenance work for the device can be reduced.

Further, since the convex portions 31 and 32 are formed of a resin having a dynamic friction coefficient with respect to metal of 0.3 or less, the vertical moving member 30 can be smoothly slid similarly to the ball race mechanism with a simpler structure than the ball race mechanism. Can be moved.

Further, since the rack 40 is formed at the same time as the vertical moving member 30 by molding, the operation for processing the rack as in the conventional case can be omitted.

The movable range of the microscope holder 20 can be easily widened only by increasing the length of the rack 40 in the vertical direction.

In the above embodiment, the vertically moving member 30 is made of polyacetal, but may be made of oil-containing resin such as oil-containing polyacetal. If an oil-containing resin is used, the oil and the metal come into contact with each other, so that the frictional resistance can be further reduced and the sliding of the microscope holder can be more smoothly performed.

Instead of using a resin as the material of the vertically moving member 30, a material obtained by sintering a fine metal powder and impregnating oil (oil-containing sintered metal) may be used.

[0048]

As described above, according to the first aspect of the present invention, the number of parts can be reduced and the assembling does not require much labor, so that the assembling time can be shortened and the apparatus can be manufactured at low cost. be able to.

According to the second aspect of the present invention, the projection can be slid along the guide groove without the ball race mechanism. In addition, the work of processing the rack can be omitted, and the apparatus can be manufactured at lower cost. Further, since the convex portion slides with the guide groove and the meshing portion between the rack and the pinion are not in contact with each other, they are less likely to be worn, thereby making it unnecessary to refuel.

[Brief description of the drawings]

FIG. 1 is a side view of a stereo microscope provided with a focusing device for a microscope according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a side view of a stereo microscope provided with a conventional microscope focusing device.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Prop 12, 13 Guide groove 20 Microscope holder (microscope mounting member) 30 Vertical moving member (movable member) 31, 32 Convex part 40 Rack 50 Rotation axis 51 Pinion

Claims (2)

[Claims] 1. A support, a microscope mounting member, a movable member fixed to the microscope mounting member and moving up and down along the support, a rack provided on the movable member, and rotatable by the support. In a focusing device for a microscope provided with a provided rotating shaft and a pinion provided on the rotating shaft and meshing with the rack, a guide groove formed in the support column in a vertical direction, and provided on the movable member, A convex portion slidably inserted into the guide groove; and a play suppressing means for suppressing play between the guide groove and the convex portion, wherein the movable member is integrally formed with the convex portion and the rack. A focusing device for a microscope characterized by being molded. 2. The apparatus according to claim 1, wherein the movable member, the projection, and the rack are formed of a resin material.
7. A focusing device for a microscope according to item 5.