JPH0453618Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an adjusting device for a rotary tube used for adjusting an eyepiece or diopter, etc. This invention relates to a device for rotating a rotating cylinder represented by.

[Prior art and its problems] Conventionally, for rotating barrels, for example, scope barrels used for binoculars or eyepiece lenses, it has been necessary to prevent the barrel from falling out due to rotation. It is generally equipped with a locking mechanism.

For example, in the technique shown in Japanese Utility Model Publication No. 58-34416, stepped portions are provided in the tube of the eyepiece tube and the blade, and by engaging these stepped portions, the rotation and elevation of the fraction are controlled. It has been proposed that it be prevented.

Further, a guide screw is formed on the side wall of the eyepiece inner tube, the guide screw protrudes from a notch groove formed in the eyepiece outer tube, and a female screw is formed on the compartment inner wall for vertically moving the notch groove. Grooves that match the outer tube and the fraction are provided on the eyepiece outer tube and the fraction, respectively, and a cutout hole is formed in a part of the groove of the fraction, and the grooves on the eyepiece outer tube and the groove of the fraction are aligned. A technique has also been proposed in which both ends of a U-shaped spring are fitted into the respective grooves through notches formed in the grooves of the divisions to prevent the divisions from coming off.

[Problems to be solved by the invention] In the techniques proposed in each of the above conventional examples,
In the technique disclosed in Japanese Utility Model Publication No. 58-34416, stepped portions are provided on the eyepiece barrel equipped with the eyepiece lens and the cylindrical portion of the blade so that these stepped portions engage with each other. is formed continuously at the end of the screw, and the eyepiece tube moves while rotating.

Generally, an eyepiece lens is assembled with a predetermined lens, etc., but this lens is generally eccentric in many cases, and due to this eccentricity, if the eyepiece lens itself is rotated, the optical axis will shift. Therefore, it is problematic to move a lens barrel having such an eccentric (or potentially eccentric) eyepiece up and down by rotational movement.

Furthermore, in the case of diopter adjustment, it is necessary to display the scale, so the rotation of the fraction must be less than 360 degrees, and there is a limit to thread cutting.

In addition, in a technique in which both ends of a U-shaped spring are fitted into the respective grooves through notched holes formed in the groove of the fraction to prevent the fraction from coming off, the spring prevents the fraction from falling off and prevents rotation. It is designed to prevent movement. In this example, the spring works effectively to prevent the screw from falling off when the screw rotation reaches its limit. When the screw rotation reaches its limit, the protrusion provided integrally with the inner cylinder screwed onto the female thread on the inner wall of the compartment moves downward (towards the lens barrel), but this movement is caused by the lack of the outer cylinder. It abuts the lower end of the cut hole and the inner cylinder does not move any further.

On the other hand, in the case of a screw, when it is rotated to the left, a force is applied in the upward direction.

In other words, even though the inner cylinder does not move, the fraction that was rotating on the same plane is subjected to an upward force and rotates to the limit of screw rotation. In this way, a force is applied in the upward direction (the downward direction), resulting in play in the rotation of the fraction.

The presence of this play occurs when the diopter adjustment mark is set based on the direction in which it rotates and hits the fixed end (lens barrel side) of the inner cylinder, and when it is fixed in the withdrawal direction.
There is a possibility that the adjustment position will be different if the adjustment position is rotated clockwise.

In this way, deviations in the position of the adjustment marks due to differences in rotational direction are not only undesirable for producers, but also cannot be said to be an appropriate locking method for this type of product that competes for accuracy. .

Additionally, it is not desirable for consumers if there are any idling points during rotation, as this will spoil the image of the product as being expensive.

The present invention was made in order to solve the above problems.For example, in the rotation of a rotating tube such as a fraction used for adjusting diopter, etc., the rotating tube has an extremely reduced amount of play. The purpose of the invention is to provide an adjustment device.

[Means for solving the problem] The present invention uses a guide screw fixed to the eyepiece inner cylinder.
A groove is formed in the side wall of the eyepiece outer cylinder, which has an engaging groove in the upper side wall and a locking protrusion on the side of the eyepiece, and the guide screw is inserted into the groove. Then, a rotary cylinder is provided with a female thread on the inner wall, a cutout hole above the female thread, a groove on the outer wall, and an engaging protrusion that contacts the locking protrusion on the eyepiece side. The eyepiece outer cylinder that has been engaged with the inner cylinder is engaged. At this time, the guide screw formed on the inner tube of the eyepiece is screwed into the female screw of the rotating tube, and the spring is inserted into the groove formed in the outer tube of the eyepiece and the groove having the notch formed in the rotating tube. into a mated configuration.

[Function] The present invention, for example, as in the case of the binoculars shown in the embodiment, engages the locking protrusion provided on the outer tube of the eyepiece with the engagement protrusion provided on the case, and rotates the case. Since it is limited, the fraction, that is, the play of the rotating cylinder can be extremely reduced.

[Example] Hereinafter, an example according to the present invention will be described with reference to the drawings.

However, in the following description, the components, other members, and arrangements described or illustrated are not intended to limit the present invention, but are merely illustrative examples.

Fig. 1 shows an example in which the present invention is applied to a diopter adjustment fraction rotation device of binoculars, Fig. 1A is Fig. 1G.
Figure 1B
is a plan view of Fig. 1A, and Fig. 1C is a plan view of Fig. 1B.
1D is a plan view of FIG. 1C; FIG. 1E is a perspective view of the fraction as a cylinder;
Figure 1F is a plan view showing an example of a spring;
Figure G shows a perspective view of the binoculars.

In the figure, reference numeral 1 denotes a cylindrical fraction provided on either one (the right side in this example) of the eyepieces attached to the left and right mirror bodies 6, and the fraction 1 is shown in FIG. 1E. As shown, on the eyepiece side surface (the upper end in FIG. 1E), two engaging protrusions 1a, 1a are formed on the same plane (or one place is OK) and inward, and on the upper part of the side wall 1b. More grooves 1c are formed along the circumference of the cylinder than half the circumference of the cylinder in fraction 1, and engagement holes 1e, 1e are formed at both ends of the grooves 1c. Furthermore, a female thread (square thread) 1f is formed on the inner wall of the fraction 1 so as to be able to rotate clockwise.

Reference numeral 2 denotes a cylindrical eyepiece outer cylinder, and the eyepiece outer cylinder 2
One end of the mirror 6 is screwed and fixed to the mirror body 6.

The side wall of the eyepiece outer tube 2 has grooves 2 in the vertical direction.
d and 2d are formed, and the eyepiece inner cylinder guide screw 3 provided in the eyepiece inner cylinder 5 is formed to be able to move up and down within the groove 2d.

Further, on the upper end of the eyepiece outer cylinder 2, locking protrusions 2a, 2
A is formed below the locking protrusion 2a, and an engaging groove 2c is formed around the entire circumference.

The eyepiece inner tube 5 and the eyepiece outer tube 2 as described above are engaged, the end of the eyepiece outer tube 2 is screwed onto the lens body 6, and the end of the eyepiece outer tube 2 is screwed into the eyepiece outer tube 2. Screw together the guide screw 3 and the female thread 1f on the inner wall of the compartment 1. At this time, the groove 1c of the fraction 1 and the groove 2c of the eyepiece outer cylinder 2
In these grooves 1c and 2c, the first
Fit the locking spring 4 as shown in Figure F. Note that the locking spring 4 is not limited to the shape as in this example, but may be any shape as long as it can fit into the groove and prevent the fraction from falling off.

Next, the operation of the above embodiment will be explained.

By rotating the fraction 1, the eyepiece inner cylinder guide screw 3 is screwed into the female thread 1f carved on the inner wall of the fraction 1 and is moved.
The fixed eyepiece inner cylinder 5 moves up and down.

When the fraction 1 is rotated within a certain range, the engaging protrusions 1a, 1a formed on the fraction 1 come into contact with the locking protrusions 2a, 2a formed on the eyepiece outer tube 2. Due to the contact between these protrusions 1a and 2a, the eyepiece outer cylinder 2 of fraction 1
limit the rotation range of In other words, the vertical movement range of the eyepiece inner cylinder 5 that interlocks with the eyepiece outer cylinder 2 is limited.

Note that fraction 1 needs to be rotated on the same plane. For this reason, the grooves 1c and 2c are aligned, and furthermore, in order to prevent fraction 1 from falling off from the eyepiece outer cylinder 2,
A spring 4 is fitted into the groove 1c and the groove 2c.

As in the above-mentioned embodiment, since the prevention of falling of the fraction and the restriction of the movable range of the eyepiece inner cylinder by rotation are configured separately, the play of the fraction can be extremely reduced unlike in the conventional case. Also, the rotation of the fraction can be made smoother. Furthermore, the positioning of the scale can be determined by either left or right rotation, and displacement of the scale can be prevented.

[Effects of the Invention] Since the present invention is configured as described above, it is possible to obtain a rotating barrel adjusting device in which the amount of play in the rotation of the rotating barrel is extremely reduced.

[Brief explanation of the drawing]

Fig. 1 shows an example in which the present invention is applied to a diopter adjustment fraction rotation device of binoculars, Fig. 1A is Fig. 1G.
Cross-sectional view along the - line with the outer skin removed, Figure 1
is a plan view of FIG. 1A, and FIG. 1C is a plan view of FIG. 1B.
1D is a plan view of FIG. 1C, FIG. 1E is a perspective view of the division as a rotating cylinder,
Figure 1F is a plan view showing an example of a spring;
Figure G shows a perspective view of the binoculars. 1... Rotating cylinder (fraction), 1a... Engaging protrusion, 1
c, 2d...groove, 1e...engaging hole, 1f...female screw, 2...eyepiece outer cylinder, 2a...locking protrusion, 2c...
...Engagement groove, 3...Guide screw (eyepiece inner cylinder guide screw), 4...Spring, 5...Eyepiece inner cylinder.

Claims (1)

[Scope of utility model registration request] an eyepiece inner tube to which a guide screw is fixed; an eyepiece outer tube having an engaging groove formed in the upper side wall and a groove for inserting the guide screw in the side wall; and a locking protrusion on the eyepiece side; and a rotary cylinder having a cutout hole and a groove formed in the outer wall above the female screw, and further having an engaging protrusion on the eyepiece side that comes into contact with the locking protrusion,
Engaging the eyepiece outer cylinder with the eyepiece inner cylinder and screwing a guide screw formed on the eyepiece inner cylinder into the female screw of the rotating cylinder, and forming a groove in the eyepiece outer cylinder and the rotating cylinder. 1. An adjusting device for a rotary cylinder, characterized in that the device is rotatably formed by fitting a spring into a groove having a cutout.