JP2002021835A - Lock member, space adjusting mechanism, optical equipment and mirror holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock member capable of securely locking a screw stopped at a lock position without displacing the axial direction and a tip position thereof, and to provide a space adjusting mechanism, an optical equipment and a mirror holder using this lock member. SOLUTION: This lock member 4 for generating the force in parallel with the axial direction of a screw 14 and applying this force to a screw is formed so that a direction of the force to be applied to the screw and a direction of the movement of the lock member itself when applying the force to the screw coincide with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock member for locking the movement of a screw, and a distance adjusting mechanism, an optical instrument and a mirror holder using the lock member.

[0002]

2. Description of the Related Art Conventionally, there are the following lock members and methods for locking the movement of a screw.

1) There is a double nut type shown in FIG.
When the interval 60 between the main body 40 and the front plate 50 is a desired interval and the movement of the screw 140 is to be locked, the lock nut 110 is tightened to apply a force upward to the screw 140 to lock the screw 140. Is what you do. In this example, the screw 140 is fitted and fixed to the main body 40 via the screw bush 120.

2) There is a set screw method shown in FIG. When trying to lock the screw 140, the screw bush 121
Is advanced by pushing the push screw 130 through which the
A force is applied to the left side of the drawing by contacting and pressing with 40 to lock the movement of the screw 140.

[0005] 3) There is a nut division system shown in FIG. When trying to lock the movement of the screw 140,
The lock screw 131 fitted to the screw bush 122 containing 23 is tightened. Then, the interval between the cuts 123 is narrowed, the fitting portion between the screw bush 122 and the screw 140 is deformed, and the movement of the screw 140 is locked.

[0006]

However, it has been found that the above-described locking member and system have the following problems.

The double nut method 1) has the following problems. That is, to lock the movement of the screw 140,
When the lock nut 110 is tightened, the rotation force is transmitted to the screw 140, and the screw 1 is screwed together with the lock nut 110.
40 also rotates.

[0008] The push screw method 2) has the following problems. That is, the axial direction of the screw 140 and the push screw 130
Because the direction of the force pressing the screw 140 is orthogonal,
If the push screw 130 is tightened to lock the movement of the screw 140, the position of the tip of the screw 140 will be shifted.

The nut dividing method 3) has the following problems. That is, the axial direction of the screw 140 and the lock screw 13
By tightening 1, the screw bush 122 is distorted, and the direction of the force generated by the distortion crosses obliquely. Therefore, when the lock screw 131 is tightened, the position of the tip of the screw 140 is shifted.

Accordingly, an object of the present invention is to provide a lock member which can be securely locked without displacing the axial direction or the position of the tip end of a screw which is locked at a position to be locked, a gap adjusting mechanism using the lock member, It is to provide an optical instrument and a mirror holder.

[0011]

Means for Solving the Problems As means for solving the above problems, a first invention is a locking member for applying a force parallel to the axial direction of the screw to the screw in order to lock the movement of the screw. There is a lock member characterized in that the direction of the force applied to the screw and the direction in which the lock member moves when applying a force to the screw match.

A second aspect of the present invention is the lock member according to the first aspect, wherein a force applied to the screw is obtained by a lock screw provided on the lock member pressing the main body. It is.

A third aspect of the present invention is the lock member according to the first aspect, wherein a force applied to the screw is applied to a tapered groove or hole formed by the lock member and the main body or a member fixed to the main body. And a lock member obtained by inserting a lock screw having a tapered end.

According to a fourth aspect of the present invention, there is provided a main body provided with the screw and the lock member according to any one of the first, second and third aspects of the invention, and a main body opposed to the main body and supported in contact with the tip of the screw. And an opposing member for providing a desired interval between the distance adjusting mechanism and the distance adjusting mechanism.

According to a fifth aspect of the present invention, in the distance adjusting mechanism according to the fourth aspect of the present invention, when the opposing member is biased by a force in a direction to reduce the distance from the main body, the locking member is used for the screw. The distance adjusting mechanism is characterized in that a lock is applied by applying a force in the same direction as the biased force.

A sixth invention is an optical instrument using the lock member according to any one of the first, second and third inventions.

A seventh aspect of the present invention is a mirror holder using the lock member according to any one of the first, second, and third aspects.

[0018]

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of an example of a mirror holder using the lock member of the present invention, and FIG. 2 is a cross-sectional view of FIG. FIG. 3 is a diagram illustrating the interval adjusting mechanism 10 shown in FIG. 2 in further detail.

A mirror (not shown) is fixedly held on the front plate 50 at the back side of the drawing of FIG. The front plate 50 is engaged with the main body 40 by the spring 30 and the engagement members 31 and 32, and is pressed from the main body 40 by the two interval adjusting mechanisms 10 and the fulcrum screws 20.

Here, the interval adjusting mechanism 10 will be described with reference to FIG. The screw 14 is fitted to the main body 40 via the screw bush 12 and presses the front plate 50. The lock member 11 is fitted with the screw 14 and the lock screw 13 but is not fitted with the main body 40 and moves smoothly.

When adjusting the distance 60 between the main body 40 and the front plate 50, the screw 14 is rotated forward and backward to adjust the distance to the front plate 50. In the case where the material of the main body 40 cannot withstand the pressing of the screw 14, it is preferable to insert a strong material 51 into the pressed contact portion and fix it. When the appropriate interval 60 is determined, the rotation of the screw 14 is stopped.

Next, the lock screw 13 is rotated to rotate the main body 40.
The hole in the blind hole 41 is advanced and the lock screw 13
Is brought into contact with the main body 40 and pressed. Then, a drag acts upward on the drawing on the lock screw 13, and this is transmitted to the lock member 11 through fitting of the male screw 13 a and the female screw 11 b. The upward force transmitted to the locking member in the drawing is applied to the screw 1 via the female screw 11a and the male screw 14a.
Transfer to 4. The direction of the force transmitted from the lock member 11 to the screw 14 is parallel to the axial direction of the screw 14, and also coincides with the direction of the drag received by the screw 14 pressing the front plate 50. Further, as a method for the lock screw 13 to press the main body 40, the lock screw 13 advanced in the blind hole 41 may press the bottom of the blind hole.

By this force, the screw 14 does not shift in the axial direction, does not rotate, and furthermore, the male screw 1
The backlash caused by the fitting of each of the 4a female screw 11a, the male screw 12a, the female screw 40a, and the male screw 14a, the female screw 12b is completely eliminated, and a secure lock is achieved. According to this embodiment, the displacement of the tip of the screw 14 due to the lock is 1 μm.
It was confirmed that it was less than.

In this embodiment, the screw 14 is fitted to the screw bush 12 via the male screw 14a and the female screw 12b, and the screw bush 12 is fitted to the main body 40 via the male screw 12a and the female screw 40a. ing. Of course, depending on the material of the main body 40, the screw 14 may be directly fitted to the main body 40.

(Embodiment 2) In this embodiment, instead of fitting the lock member 11 and the screw 14 in the first embodiment, a flange is provided at an appropriate position of the shaft of the screw 14 so that the lock member is hooked here. It was made. That is, both the lock member 11 and the screw 14 slide smoothly,
When the interval 60 becomes a desired interval and the screw 14 is locked, the lock screw 13 is advanced to apply a force upward to the drawing to the lock member 11 as in the first embodiment. At this time, the locking member 11 is hooked on the flange provided on the screw 14, and the screw 14 is locked in the same manner as in the first embodiment by providing a position flange in which an upward force is applied to the screw 14.

(Embodiment 3) Still another embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a cross-sectional view of the gap adjusting mechanism 10 according to the present embodiment, and FIG. 5 is a side view of the embodiment and a modification of the lock member 15 (represented by 150 and 151 in FIG. 5). FIG.

In FIG. 4, the lock member 15 is
However, it does not fit with the main body 40 and moves smoothly. When the appropriate interval 60 is determined, the screw 14
Is stopped, and the lock screw 16 that fits and penetrates the main body 40 with the male screw 16a and the female screw 40b is advanced to make contact with the lock member 15. Here, the tip of the lock screw is provided with a taper 16c, and the lock member 15 is also provided with a taper 15b which slides on the taper 16c. As the lock screw 16 advances, the tapers 16c and 15b slide to apply an upward force to the lock member 15 in the drawing. This force is transmitted to the screw 14 through the fitting of the female screw 15a and the male screw 14a, and the screw 14 is locked. When the lock screw 16 is advanced, care should be taken not to contact the screw 14 and press it.

Although the lock screw 16 is directly fitted to the main body 40 in FIG. 4, a screw bush may be interposed depending on the material of the main body 40.

Here, the embodiment 150 and the modification 151 of the lock member 15 will be described in more detail with reference to FIG. In FIG. 5, the left is a view of the lock members 150 and 151 from the side, and the right is a view from the top. The locking members 150 and 151 have locking screws 16 at their shoulders.
Tapered portions 150b, 1b that slide with the tapered portion 16c
51b. In 150b, the locking member 150
Are provided on the entire periphery of the lock member 151b. Here, in the case of the lock member 150, the lock screw 16
Of the lock member 150 by sliding with the tapered surface 16c.
It is conceivable that the rotation of the lock member 150 will generate a force for rotating the screw 14. Therefore, the rotation of the lock member 150 is prevented by providing the rotation preventing groove 150a and inserting the rotation preventing shaft into this groove.

In the present invention, when locking the screw 14, no force for rotating the screw 14 is generated, and
Screw 1 to control the distance 60 between the main body 40 and the front plate 50
Since the direction of the force applied to the screw 4 and the direction of the force applied to the screw 14 by the lock member 11 match, the screw 14 is rotated, displaced in the axial direction, and caused by backlash of the fitting portion. Has the effect of not causing displacement of the tip position

In addition, since the direction of the force applied to the screw 14 by the spring 30 and the direction of the force applied to the screw 14 by the lock member 11 match, it is necessary to lock the screw 14. Since the force applied to the fitting portion between the screw 14 and the screw bush 12 is reduced, the mechanical life of this portion can be extended.

Further, in all the embodiments of the present invention, since the lock member 11 is only fitted or slid with the screw 14, if it is desired to remove the lock mechanism as desired, the fitting of the lock member 11 and the screw 14 is performed. This can be achieved only by uncoupling.

As described above in detail, the present invention is a locking member for applying a force parallel to the axial direction of a screw to a screw to lock the screw at the position to be locked, the force applied to the screw. And the direction in which the locking member moves when a force is applied to the screw.This ensures that the screw is securely locked without shifting the axial direction or the tip position. Making it possible.

[Brief description of the drawings]

FIG. 1 is a top view of an example of a mirror holder according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the mirror holder illustrated in FIG. 1 taken along a line XX and viewed from a side.

FIG. 3 is a cross-sectional view illustrating a cut surface of the gap adjusting mechanism 10 illustrated in FIG. 2 in further detail.

FIG. 4 is a cross-sectional view illustrating a cut surface of an embodiment different from FIG. 3 in the gap adjusting mechanism 10.

FIG. 5 is a side view and a top view of an embodiment and an embodiment of a different shape in the lock member 15 shown in FIG.

FIG. 6 is an example of a conventional technique according to an embodiment of the present invention.

FIG. 7 is an example of a conventional technique according to an embodiment of the present invention.

FIG. 8 is an example of a conventional technique according to an embodiment of the present invention.

Claims (7)

[Claims] 1. A locking member for applying a force parallel to an axial direction of a screw to a screw in order to lock a movement of the screw, wherein the locking member moves when a force is applied to the screw and a force is applied to the screw. A lock member, the directions of which are identical. 2. The lock member according to claim 1, wherein
A lock member, wherein a force applied to the screw is obtained by a lock screw provided on the lock member pressing the main body. 3. The lock member according to claim 1, wherein:
A lock member characterized in that a force applied to a screw is obtained by inserting a lock screw having a taper at a tip into a tapered groove or hole formed by a lock member and a main body or a member fixed to the main body. 4. A body provided with the screw and the lock member according to claim 1, facing the body,
An interval adjusting mechanism having an opposing member that is provided in contact with a tip of a screw to provide a desired interval between the main body and the screw. 5. The distance adjusting mechanism according to claim 4, wherein
When a force is applied to the opposing member in a direction to reduce the distance from the main body, a locking member is used to apply a force to the screw in the same direction as the urged force to lock the screw. Interval adjustment mechanism. 6. An optical instrument using the lock member according to claim 1. 7. A mirror holder using the lock member according to any one of claims 1, 2, and 3.