JP2600821Y2 - Diopter correction mechanism for binoculars - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diopter correcting mechanism for binoculars that moves a lens in a direction parallel to its optical axis by rotating a diopter ring.

[0002]

2. Description of the Related Art Generally, in a center-focus type binocular, a diopter correction mechanism is provided in one of right and left eyepieces in order to correct diopter of right and left eyes. The observer performs the diopter correction by rotating the diopter ring constituting the diopter correction mechanism around the optical axis. By the way, if the diopter ring rotates after the diopter correction, the diopter that has been adjusted will be shifted, so in the related art, using a highly viscous grease, the rotational torque of the diopter ring is increased. I have.

[0003]

Normally, binoculars are used with a strap attached to the binoculars and hung on a neck. In this case, since the binoculars are hung from the neck except during observation, in the related art, the diopter ring touches the body and slightly rotates, and the diopter may be deviated. Also, even if high-viscosity grease is used to prevent the diopter ring from rotating easily, if the temperature becomes high and the viscosity of the grease decreases, the diopter ring will eventually rotate with a light force. I will. That is, in the related art, there is a problem that the diopter ring may rotate even after the diopter correction, and the corrected diopter may be out of order.

The present invention has been made in view of such a conventional problem, and provides a diopter correction mechanism for binoculars that does not change its diopter once the diopter has been corrected. With the goal.

[0005]

Binoculars diopter correction mechanism for achieving Means for Solving the Problems] The object is, by rotating the diopter ring around the optical axis of the eyepiece, and parallel its optical axis eyepiece In a diopter correction mechanism for binoculars that moves in the direction, a first locking unit is formed on the diopter ring, and a second locking unit that is capable of engaging the first locking unit with a mirror body of the binoculars. Means are formed, said diopter ring is rotated in a direction parallel to the optical axis, said diopter ring can be rotated around the optical axis to move said lens in a direction parallel to the optical axis; The first locking means of the diopter ring engages with the second locking means formed on the mirror body, and is movably disposed at a non-rotatable position at which rotation about the optical axis becomes impossible. A force greater than or equal to a predetermined force acts on the diopter ring at the non-rotatable position in the direction of the rotational position. As long as it is a convergent degree ring which is characterized in that it comprises the diopter ring movement restraining means to be constrained to the nonrotatable position.

[0006] Here, the diopter ring movement restraining means includes a resilient member that is biased in a direction that includes a vertical component with respect to one end thereof the optical axis, the diopter ring, or convergent of the ring Inside
A non-rotatable position restraining hole formed in a cam ring disposed on the circumferential side and recessed in a direction including a vertical component with the optical axis so that the one end of the elastic body enters at the non-rotatable position. It may be configured to have. Further, the diopter ring movement restricting means may include an elastic body for urging the diopter ring in the direction of the non-rotatable position with respect to the rotational position.

[0007] In the above description, the mirror body includes not only the mirror body itself but also a part fixed to the mirror body.

[0008]

When the diopter is corrected, the diopter ring is positioned at the rotational position. The diopter ring at the rotational position is rotatable about the optical axis. Then, rotate the diopter ring around the optical axis, and move the lens together with the lens frame in a direction parallel to the optical axis.
Execute diopter correction.

When the diopter correction is completed, the diopter ring is moved from the rotational position to the non-rotatable position. The diopter ring in the non-rotatable position can rotate around the optical axis because the first locking means of the diopter ring is engaged with the second locking means formed on the mirror body. Can not. In addition, the diopter ring at the non-rotatable position is restricted to this position by the diopter ring movement restricting means, and therefore does not move to the rotational position unless a predetermined force or more acts in the direction of the rotational position.

Therefore, the diopter ring at the non-rotatable position is
It cannot rotate around the optical axis, and does not move in a direction parallel to the optical axis (rotational position direction) even if some force is applied to the diopter ring from the outside. For this reason, after the diopter correction, the diopter is not shifted by positioning the diopter ring at the non-rotatable position.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of the binoculars according to the present invention will be described below with reference to the drawings. First, a first embodiment of the binoculars according to the present invention will be described with reference to FIGS.

The binoculars of the present embodiment, as shown in FIG.
By rotating the focus knob 18 with center focus binoculars, the left and right objective lenses 19, 19 '
Is moved in a direction parallel to the optical axis to perform focus adjustment. By the way, observers usually have different left and right eyesight. Therefore, in this embodiment, a diopter correction mechanism is provided in one of the left and right eyepieces (the right eyepiece in this embodiment) in order to perform diopter correction.

As shown in FIG. 1, one end (object lens 1)
The cylindrical eyepiece frame 1 having a flange 1c formed on the (9 side) is fixed to the mirror body 2 by screws 3 penetrating the flange 1c. A cylindrical cam ring 4 is rotatably fitted around the optical axis C on the outer peripheral side of the eyepiece frame 1. This cam ring 4
Has one end side (the objective lens 19 side) in contact with the flange 1c of the eyepiece frame 1 and the other end side thereof in contact with the holding ring 5 screwed to the eyepiece frame 1, and moves in a direction parallel to the optical axis C. Is regulated. The cam ring 4 is provided with an annular diopter ring 6 around its optical axis C.
It is fitted so as to be rotatable around and movable in a direction parallel to the optical axis C. In the eyepiece frame 1, a cylindrical outer peripheral side lens frame 13 is mounted so as to be movable in a direction parallel to the optical axis C. The eyepiece 1 is provided in the outer lens frame 13.
The inner peripheral lens frame 9 into which 0, 10, and 10 are inserted is housed. The inner peripheral lens frame 9 is fixed in the outer peripheral lens frame 13 by a lens frame retaining ring 14.
The eyepieces 10, 10, 10 include a lens spacing ring 11
And is fixed in the inner peripheral side lens frame 9 by the lens holding ring 12. In FIG. 1, reference numeral 16 denotes a mirror protection cover, 1
Reference numeral 7 denotes a target rubber.

The eyepiece frame 1 is formed with a long hole 1a parallel to the optical axis C. 1 and 3, a spiral cam groove 4a is formed around the optical axis C, and a diopter ring interlocking screw 7 is embedded in the cam ring 4. As shown in FIG. The screw head portion of the diopter ring interlocking screw 7 protrudes from the cam ring 4 in an outward direction (a direction perpendicular to the optical axis C). A cam screw 15 is provided in the cam groove 4a of the cam ring 4.
Is inserted. The tip of the cam screw 15 is screwed into the outer peripheral lens frame 13 via the long hole 1a of the eyepiece frame 1. On the inner peripheral side of the diopter ring 6, a linear groove 6a that is long in a direction parallel to the optical axis C and into which the head of the diopter ring interlocking screw 7 enters is formed.

An end of the collar 1c of the eyepiece frame 1 has a locking tooth 1b.
Are formed. 1 is also provided on one end side (the objective lens 19 side) of the diopter ring 6 movable in a direction parallel to the optical axis C.
As shown in FIG. 2, locking teeth 6 b are formed to face and mesh with the locking teeth 1 b of the eyepiece frame 1. As shown in FIGS. 3 and 4, a leaf spring mounting groove 4 b is formed on the outer peripheral side of the cam ring 4. This leaf spring mounting groove 4b
, A V-shaped leaf spring 8 is inserted, and one side of the V-shape is fixed to the leaf spring mounting groove 4b. The other side end of the V-shaped leaf spring 8 has an outward direction (a direction perpendicular to the optical axis C).
A click portion 8a bulging out is formed.

On the inner peripheral side of the diopter ring 6, as shown in FIGS. 4 and 5, the locking teeth 6b of the diopter ring 6 are fixed to the locking teeth 1 of the eyepiece frame 1.
b, the non-rotatable position restraining hole 6d into which the click portion 8a of the leaf spring 8 enters and the locking teeth 6b of the diopter ring 6 are positioned at the non-rotatable position where the diopter ring 6 is not rotatable.
A rotation position restricting hole 6c into which the click portion 8a of the leaf spring 8 enters is formed at a rotational position where the diopter ring 6 can rotate without engaging with the locking teeth 1b. In this embodiment, the diopter correction mechanism includes a locking tooth 1b of the eyepiece frame 1, a cam ring 4, a diopter ring 6, a diopter ring interlocking screw 7, a leaf spring 8, and a cam screw 15 And is configured. Also,
The diopter ring movement restricting means includes a leaf spring 8 and a rotational position restricting hole 6 c and a non-rotatable position restricting hole 6 d formed in the diopter ring 6.

Next, the operation of the diopter correction mechanism of this embodiment will be described. First, the diopter ring 6 is positioned at the rotation position. As shown in FIGS. 1 and 4, the diopter ring 6 at this rotation position is rotatable without the locking teeth 6 b meshing with the locking teeth 1 b of the eyepiece frame 1. Further, the click portion 8a of the leaf spring 8 enters the rotation position restraining hole 6c of the diopter ring 6, and the diopter ring 6 is hard to move in a direction parallel to the optical axis C.

In this state, the diopter ring 6 is rotated around the optical axis C. When the diopter ring 6 rotates, the linear groove 6a of the diopter ring 6
The cam ring 4 in which the diopter ring interlocking screw 7 is embedded rotates around the optical axis C together with the diopter ring interlocking screw 7 that is engaged with. When the cam ring 4 rotates, the cam screw 15 engaged with the spiral cam groove 4a of the cam ring 4
Attempts to move in a spiral around the optical axis C. However, since the cam screw 15 is inserted through the elongated hole 1a formed in the eyepiece frame 1 and parallel to the optical axis C, the optical axis C
The movement of the surrounding rotation direction component is regulated, and the rotation moves in a direction parallel to the optical axis C. Due to the movement of the cam screw 15 in the direction parallel to the optical axis C, the outer peripheral side lens frame 13 in which the tip portion of the cam screw 15 is embedded also moves in the direction parallel to the optical axis C. As a result, the eyepiece 10 moves in a direction parallel to the optical axis C together with the inner peripheral lens frame 9 fixed to the outer peripheral lens frame 13.

As described above, when the diopter ring 6 is positioned at the rotational position and is rotated around the optical axis C, the eyepiece 10 moves in a direction parallel to the optical axis C, and the diopter can be corrected. it can.

When the diopter correction is completed, the diopter ring 6 is moved along the optical axis C.
Is moved in the direction parallel to the direction and toward the flange 1c side of the eyepiece frame 1.
In the rotational position, the rotational position restricting hole 6c of the diopter ring 6
When the diopter ring 6 is moved, the click portion 8a of the leaf spring 8 is inserted into the spring 8 so as to oppose the urging force of the leaf spring 8 (acting in the direction perpendicular to the optical axis C). Therefore, it is necessary to move the diopter ring 6. By the movement of the diopter ring 6 in a direction parallel to the optical axis C, the diopter ring 6 reaches the non-rotatable position as shown in FIG. 5, and the locking teeth 6b of the diopter ring 6 lock the eyepiece frame 1. When meshed with the tooth 1b, the click portion 8a of the leaf spring 8 enters the non-rotatable position restraining hole 6d of the diopter ring 6. Therefore, a force in a direction parallel to the optical axis C against the urging force of the leaf spring 8 (acting in a direction perpendicular to the optical axis C) is applied to the diopter ring 6.
The diopter ring 6 cannot move from the non-rotatable position to the rotational position unless it works. The locking teeth 6 of the diopter ring 6
As a result, the diopter ring 6 cannot rotate around the optical axis C as a result of the engagement of b with the locking teeth 1 b of the eyepiece frame 1 fixed to the mirror body 2.

As described above, the diopter ring 6 at the non-rotatable position cannot rotate around the optical axis C, and is parallel to the optical axis C even if a slight force is applied to the diopter ring 6 from outside. Can not move to. Therefore, after the diopter correction, if the diopter ring 6 is moved to the non-rotatable position, the eyepiece 10 that moves in the direction parallel to the optical axis C with the rotation of the diopter ring 6 moves in the direction parallel to the optical axis C. Cannot be moved, and the corrected diopter does not go out of order. In the present embodiment, the leaf spring 8 is provided on the cam ring 4 and the non-rotatable position restricting hole 6 d and the rotational position restricting hole 6 c are formed on the diopter ring 6. Needless to say, a non-rotatable position restricting hole and a rotational position restricting hole may be formed in the cam ring 4.

Next, a binocular according to a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the configuration of the diopter ring movement restricting means of the first embodiment is changed, and the other basic configuration is the same as that of the first embodiment. Therefore, the same parts as those in the first embodiment are denoted by the same reference numerals, and duplicate description will be omitted.

As shown in FIGS. 7 and 8, the diopter ring movement restricting means of this embodiment uses a diopter ring 6A movable in a direction parallel to the optical axis C with reference to the rotational position. It is configured to include coil springs 20, 20 for urging in the direction of the non-rotatable position. The diopter ring 6A rotatable around the optical axis C and movable in a direction parallel to the optical axis C has the locking teeth 6Ab formed on one end side (the objective lens 19 side) as described above, and the other end. A pressing surface 6Ae perpendicular to the optical axis C and on which the urging force of the coil spring 20 is applied is formed on the side.

A holding ring 5A screwed to the eyepiece frame 1 and for restricting the movement of the cam ring 4 in a direction parallel to the optical axis C includes:
Two spring insertion holes 5Aa recessed in a direction parallel to the optical axis C are formed at positions facing the pressing surface 6Ae of the diopter ring 6A. The inner diameter of the spring insertion hole 5Aa is larger than the coil diameter of the coil spring 20, into which the coil spring 20 is inserted. The coil spring 20 includes
A cap 25 is covered from the tip side (the objective lens 19 side). The inner diameter of the cap 25 substantially matches the coil diameter of the coil spring 25, and the outer diameter of the cap 25 substantially matches the inner diameter of the spring insertion hole 5Aa. That is, the cap 25 is formed so that the coil spring 20 is firmly inserted into the cap 25 and can be inserted into the spring insertion hole 5Aa in a state of being in contact with the side peripheral surface of the spring insertion hole 5Aa. The tip of the cap 25 has a hemispherical shape so as to make point contact with the pressing surface 6Ae of the diopter ring 6A.

The coil spring 20 that urges the diopter ring 6A in the direction of the non-rotatable position allows the urging force to act in the same direction even when the diopter ring 6A is located in the non-rotatable position, and allows the normal operation. One that allows a person to relatively easily move the diopter ring 6A from a non-rotatable position to a rotational position with a finger is used.

Next, the operation of the diopter ring movement restricting means of this embodiment will be described. Since the diopter ring 6A is always urged by the coil spring 20 in the direction of the non-rotatable position based on the rotational position, it is usually located at the non-rotatable position as shown in FIG. Are locked with the locking teeth 1b of the eyepiece frame 1 and cannot rotate around the optical axis C.

When correcting the diopter, as shown in FIG.
A force that overcomes the urging force of the coil spring 20 is applied to the diopter ring 6A to move the diopter ring 6A located at the non-rotatable position to the rotational position. Then, the diopter ring 6A is rotated while applying force to the diopter ring 6A to maintain this position. When the diopter ring 6A rotates, the cam ring 4 rotates and the eyepieces 10, 10, 10 move in a direction parallel to the optical axis C, as described above. Thus, when the diopter correction is completed,
Release the diopter ring 6A. Then, the diopter ring 6A returns to the non-rotatable position by the urging force of the coil spring 20 as shown in FIG. 7, and the locking teeth 6Ab of the diopter ring 6A mesh with the locking teeth 1b of the eyepiece frame 1. Cannot rotate around the optical axis C. In other words, when the diopter ring 6A is released after the diopter ring 6A is released after the diopter ring 6A is rotated, the diopter ring 6A cannot immediately rotate around the optical axis C, and the eyepiece lens 10 becomes parallel to the optical axis C. You can not move in the direction.

Therefore, in this embodiment, similarly to the first embodiment, if the diopter ring 6A is released after the diopter correction, the diopter ring 6A cannot be rotated around the optical axis C, and the eyepiece lens is not rotated. 1
Since 0 cannot be moved in a direction parallel to the optical axis C, the once-corrected diopter does not change. Also, in the present embodiment, when turning the diopter ring 6A located at the rotational position, it is necessary to apply a force to overcome the urging force of the coil spring 20 as compared with the first embodiment. When the diopter ring 6A is released after the degree correction is completed, the diopter ring naturally returns to the non-rotatable position, so that forgetting to return to the non-rotatable position can be prevented.

By the way, the cap 25 in this embodiment is
Is to prevent the coil spring 20 from deforming in the direction perpendicular to the optical axis C, to smoothly perform the expansion and contraction operation of the coil spring 20, and to make the urging force acting member to the pressing surface 6Ae of the diopter ring 6A point-contact. Thus, the diopter ring 6A is rotated smoothly.

In each of the above embodiments, the leaf spring 8 and the coil spring 20 which are constituent elements of the diopter ring movement restricting means are used.
The spring is not limited to these springs, and any elastic body that acts substantially similarly may be used.

[0031]

According to the present invention, the diopter ring is rotated around the optical axis when the diopter ring is moved from the rotation position to the non-rotatable position after the diopter ring has been corrected by rotating the diopter ring. , The diopter once corrected does not go out of order.

[Brief description of the drawings]

FIG. 1 is a sectional view of a diopter correcting mechanism for binoculars according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the locking teeth of the diopter ring and the locking teeth of the eyepiece frame according to the first embodiment of the present invention;

FIG. 3 is a sectional view taken along line AA in FIG.

FIG. 4 is a sectional view (rotational position) taken along line BB in FIG. 3;

FIG. 5 is a sectional view taken along line BB in FIG. 3 (non-rotatable position).
It is.

FIG. 6 is a top view of the binoculars according to the first embodiment of the present invention.

FIG. 7 is a cross-sectional view (non-rotatable position) of a diopter correction mechanism for binoculars according to a second embodiment of the present invention;

FIG. 8 is a sectional view (rotational position) of a diopter correction mechanism for binoculars according to a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Eyepiece frame, 1b ... Locking tooth (of eyepiece frame), 2 ... Mirror, 4
... Cam ring, 4a ... Cam groove, 5,5A ... Pressing ring, 5Aa ...
Holes for inserting springs, 6, 6A: diopter ring, 6b, 6Ab: locking teeth (of diopter ring), 6c: holes for restricting rotational position, 6d: holes for restricting non-rotatable position, 6Ae: pressing surface, 7 ... Diopter ring interlocking screw, 8 ... leaf spring, 8a ... click part, 9 ... inner peripheral lens frame, 10, 10 '... eyepiece, 13 ... outer peripheral lens frame, 15 ... cam screw, 18 ... focus knob, 1
9, 19 ': objective lens, 20: coil spring, 25: cap.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G02B 23/00 G02B 7/12

Claims (3)

(57) [Scope of request for utility model registration] 1. A by rotating the diopter ring around the optical axis of the eyepiece, the diopter correction mechanism binoculars moving the eyepiece in a direction parallel to its optical axis, first the diopter ring The second locking means capable of engaging the first locking means is formed on the mirror body of the binoculars, and the diopter ring is arranged in a direction parallel to an optical axis. A rotation position at which the diopter ring can rotate around the optical axis to move the lens in a direction parallel to the optical axis, and a second locking means formed on the mirror body has a diopter ring. Into a non-rotatable position where the first locking means engages and cannot rotate around the optical axis;
A diopter ring that is movably arranged and that restricts the diopter ring to the non-rotatable position as long as a predetermined force or more does not act on the diopter ring in the non-rotatable position in the rotational position direction. A diopter correction mechanism for binoculars, comprising a movement restricting means. Wherein said diopter ring movement restraining means includes a resilient member having one end portion is biased in a direction that includes a vertical component with respect to the optical axis, the diopter ring, or of the visual degree ring Cam located on the peripheral side
Is formed on the ring, wherein to the one end of the elastic body in non-rotatable position enters, has a non-rotatable position constraining hole is recessed in a direction including the optical axis and a vertical component The diopter correction mechanism for binoculars according to claim 1. 3. The diopter ring movement restricting means, in the direction of the non-rotatable position with respect to the rotational position,
The diopter correction mechanism for binoculars according to claim 1, further comprising an elastic body for urging the diopter ring.