JP2599282Y2 - Diopter adjustment 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 difference adjusting mechanism for binoculars which adjusts a focus by moving two objective lenses of a telephoto optical system arranged in parallel with their optical axes parallel to each other in the optical axis direction.

[0002]

2. Description of the Related Art Conventionally, in binoculars in which two telephoto optical systems are arranged side by side with their optical axes parallel, generally, a focus adjustment mechanism for simultaneously moving the eyepieces of the left and right telephoto optical systems in the optical axis direction, and one of them. A diopter difference adjustment mechanism that enables the eyepiece to move independently is provided, and the diopter difference adjustment mechanism adjusts the diopter difference between the left and right eyes of the user and adjusts the diopter difference. The focus adjustment is performed by a focus adjustment mechanism. On the other hand, recently, a telephoto optical system in which the optical axis of the objective lens and the optical axis of the eyepiece are decentered by a Porro prism interposed between the two lenses is arranged in parallel with a constant distance between the optical axes of the objective lenses. Binoculars of the type that adjusts the interpupillary distance by rotating the eyepiece around the optical axis of the objective lens have been proposed.
Since it is easier to provide the focus adjustment mechanism on the objective lens side where the distance between the optical axes does not change even by adjusting the interpupillary distance, it is easier to provide the objective lens than to provide the focus adjustment mechanism on the eyepiece that swings in two axes by adjusting the interpupillary distance. It is configured to move in the axial direction to adjust the focus.

[0003]

However, if the diopter difference adjustment is performed on the eyepiece lens side in the binoculars configured to adjust the focus by moving the objective lens as described above, it is only for that purpose. In addition, at least one of the eyepieces must be able to be moved and adjusted, complicating the configuration,
This causes a cost increase.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above background, and has as its object the provision of a diopter adjustment mechanism for binoculars that can adjust the diopter using a focus adjustment mechanism and can simplify the configuration. I do.

[0005]

In order to achieve the above object, the diopter adjusting mechanism of the binoculars according to the present invention is provided with a bi-telephoto optical system through an objective lens moving operation member which is moved and driven by a focus adjusting driving means. The objective lens moving operation member is engaged with one of the objective lens frames such that the objective lens cannot move relatively in the optical axis direction. An operating member main body having an engaging portion, and (2) an engaging member which is engaged with the other objective lens frame so as to be relatively immovable in the optical axis direction and is relatively movable with respect to the operating member main body in the optical axis direction. A mating operation member, and (3) a feed screw screwed to the engagement operation member and supported so as to be immovable and rotatable relative to the operation member body in the optical axis direction. Further, a feed screw rotating operation member for rotating the feed screw is provided at a fixed portion of the binocular main body. When the feed screw is rotated by the feed screw rotation operation member, the engagement operation member moves relative to the operation member main body. Thereby, the other objective lens frame moves in the optical axis direction with respect to the one objective lens frame, and diopter difference adjustment is performed.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view of binoculars to which an embodiment of a diopter difference adjusting mechanism for binoculars according to the present invention is applied, FIG. 2 is a plan view, FIG. 3 is a side view, FIG. 4 is a bottom view, and FIG. A-A
It is sectional drawing. In the illustrated binoculars, a Porro prism is used as an erect prism, and an optical axis O of an objective lens (not shown) is used.
The left and right telephoto optical systems 10 (10L, 10R) in which the optical axis of the eyepiece 12 is decentered by a predetermined amount with respect to A are connected to the connection holding member 20 and the rear surface of the connection holding member 20. The main body member 30 and the holding plate 40 fixed to the rear surface of the main body member 30 are configured to be supported in parallel with a predetermined distance therebetween.

In the telephoto optical system 10, an objective lens barrel 13 and an eyepiece 12 are eccentrically connected via a prism chamber 15 in which a Porro prism (not shown) is provided. The objective lens barrel 13 (13L, 13R)
A holding plate 40 fixed to the rear surface of the main body member 30 is slidably and rotatably fitted in holding holes 21 (21L, 21R) formed in parallel with the connection holding member 20 at predetermined intervals. The substantially hemispherical projection 15A protruding at a position where the rear surface (the surface on the eyepiece unit 12 side) of the prism chamber 15 of the optical system 10 intersects the optical axis OA of the objective lens cannot fall off and allows rotation. Press and hold the telephoto optical system 10
L, 10R are the optical axes OA, OA, of the objective lens (not shown).
The objective lens is rotatable about the optical axis OA of each objective lens with the OA being parallel.

[0008] Gear-shaped teeth 15B of a predetermined thickness meshing with each other are provided at opposing portions of the front ends of the prism chambers 15 of the two telephoto optical systems 10L and 10R.
The two telephoto optical systems 10L and 10R are turned around the optical axis OA of the objective lens by the engagement of the teeth 15B about the rotation center of the OR (ie, the optical axis OA of the objective lens). The distance between the eyepieces 12L and 12R is changed by the interlocking rotation so that the interpupillary distance can be adjusted.

In the objective lens barrels 13L and 13R, a lens frame 14 containing an objective lens (not shown) is provided.
L and 14R are inserted so as to be slidable in the direction of the optical axis OA of the objective lens. Mounting position of the coupling and holding member 20 on both telephoto optical systems 10L and 10R (holding holes 21L and 21R).
R), a focus adjusting mechanism 50 including a diopter difference adjusting function is provided on the center bottom surface side.
The operation arm 51A and the movable operation arm 55A of the slider 51 described later are respectively provided with through holes 20A, 20A formed in the connection holding member 20 and the objective lens barrels 13L, 1L.
It is fitted into the engagement grooves 14A, 14A of the lens frames 14L, 14R via the through holes 13A, 13A formed in the 3R.

FIG. 6 is a plan view, and FIG.
8 is a longitudinal sectional view, and FIG. 8 is a sectional view taken along the line BB in FIG. 7. A slider 51 as an objective lens moving operation member is shown in an accommodating recess 22 formed in the coupling holding member 20, and FIG. The slider 51 is disposed so as to be movable by a predetermined amount in a direction parallel to the optical axis OA of the objective lens, and the slider 51 is disposed rearward (on the eyepiece 12 side) as shown in FIG. It is moved and driven by a motor 60 as a focus adjustment driving means. The lower surface side of the focus adjustment mechanism 50 is
And, it is covered with a lower cover 70 fixed to the lower surface of the main body member 30 and held so as not to fall off. The motor 6
0 is driven by using batteries 33... Housed in the upper part of the main body member 30 as a power source, and is turned on and off by a switch 32 (only in FIG. (Shown) is performed.

The slider 51 is a slider as an operation member main body having an operation arm 51A integrally engaged with a lens frame 14L of the telephoto optical system 10L on one side (left side as viewed from the eyepiece unit 12). A movable member 55 in which a movable operation arm 55A as an engagement operation member for engaging with the lens frame 14R of the telephoto optical system 10R is integrally erected on the main body 52 slides in a direction parallel to the optical axis OA of the objective lens. It is provided so as to be movable. The slider main body 52 extends rearward from the rear end surface of the main body 53 in which an opening 53A vertically penetrating is formed at the center with the drive arm 54 being eccentric to the side by a predetermined amount. A rack 54 </ b> A is formed on the inner end surface of the distal end of the drive arm 54. Further, guide projections 53B and 53C having a rectangular cross section extend in the front-rear direction at the upper center of the front and rear frame portions of the opening 53A of the main body 53, and one (left side as viewed from the eyepiece unit 12) side frame portion. As described above, the operation arm 51A is provided upright.

A feed screw 56 as a feed screw passes through the front and rear frames of the main body 53, and is rotatably and axially rotated by a large-diameter flange portion 56A at a rear end and a gear 57 fixed to a front end. Is immovably mounted. The tooth tip of the gear 57 projects below the lower surface of the main body 53 by a predetermined amount. The movable member 55 is slidably fitted in the opening 53A in the front-rear direction by a predetermined amount.

The movable member 55 has a slider body 52
Guide projections 55B similar to the guide projections 53B and 53C of FIG.
A movable operation arm 55A is integrally provided upright on the side opposite to the slider body 52, and a fitting portion 55D formed with a female screw 55C into which a feed screw 56 is screwed is formed at a lower portion. The width is formed so as to be slidably fitted into the opening 53 </ b> A of the main body 52. The fitting portion 55D fits into the opening 53A of the slider body 52 so as to be slidable in the front-rear direction, and the feed screw 56 is screwed into the female screw 55C.
And the opening 5 of the slider body 52 facing the rear surface
A spring 58 externally inserted into the feed screw 56 is interposed between the inner surfaces of the 3A and is attached to the slider body 52 in a state where it is urged forward by the spring 58 so as not to be detached. Accordingly, the movable member 55 is slidably moved in the front-rear direction by the rotation of the feed screw 56 while the backlash is prevented by the bias of the spring 58. That is, the lens frame 14L of the telephoto optical system 10L is provided on one side of the slider 51.
An operating arm 51A is integrally provided with the movable screw 55A, and a movable operating arm 55A of the movable member 55 is provided on the other side symmetrically with the operating arm 51A. The rotational drive of 56 enables the drive arm 51A to move in the front-rear direction parallel to the optical axis OA of the objective lens.

On the other hand, a guide groove 22A is formed in the center of the housing recess 22 of the connection holding member 20 in a direction parallel to the optical axis OA of the objective lens. The guide groove 22A has a slider body 52 and a movable member 55. Guide projections 53B, 5
3C and 55B are slidably fitted to each other,
By being guided by A, the slider main body 52 and the movable member 55 can move by a predetermined amount in a direction parallel to the optical axis OA of the objective lens. Inner surface (upper surface) of lower cover 70
At a position corresponding to the gear 57 of the slider 51, a rack member 80 provided with a rack 81 that meshes with the gear 57.
Are slidably provided in the left-right direction.

The rack member 80 has a rack 81 with a predetermined width formed on the front end side of the upper surface thereof, and a left and right recess 82 formed on the lower surface on the rear end side extends in the left and right direction on the inner surface of the lower cover 70. The guide protrusion 71 is slidably fitted to the provided guide protrusion 71 and is movable left and right along the guide protrusion 71. At the center of the concave portion 82, a projection 83 reaching the back side of the lower cover 70 is protruded through a long hole 72 formed in the center of the guide projection 71 and extending in the left-right direction. The operation member 84 is screwed from the back side of the cover 70, and the rack member 80 is moved left and right by operating the operation member 84 left and right. That is, in the configuration of this embodiment, the lower cover 7
Reference numeral 0 denotes a binocular main body fixing member, and the rack member 80 and the operation member 84 constitute a feed screw rotation operation member.

On the inner surface (upper surface) of the lower cover 70, on the center side adjacent to the rack 54A of the drive arm 54 of the slider 51, a friction clutch gear 90 in which two large and small gears are concentrically arranged is provided. The rotation axis direction is arranged vertically, the small-diameter gear 91 meshes with the rack 54A of the driving arm 54, and the large-diameter worm wheel 92 is arranged on the inner surface of the lower cover 70 with the rotation axis being in the front-rear direction. The worm 61 is engaged with a worm 61 fixed to a spindle of the motor 60. As shown in FIG. 11, which is a cross-sectional view taken along line CC of FIG. 3, the friction clutch gear 90 has a large-diameter worm wheel 92 fitted to a shaft 91A integrally projecting from a small-diameter gear 91 so as to be relatively rotatable. At the same time, a spring 94 is interposed between the holding ring 93 attached to the shaft 91A and the side surface of the worm wheel 92, and the small-diameter gear 91 and the large-diameter worm wheel 92 are pressed against each other by the urging force of the spring 94. The two gears 91 and 92 are configured to rotate synchronously (the rotational force is transmitted) by the frictional force of the two until the transmission torque reaches a predetermined value, and to idle when the transmission torque exceeds a predetermined value. It is.

The focus adjusting mechanism 50 constructed as described above.
Is driven by the rotation of the motor 60 to move the slider 51 along the guide groove 22A of the connection holding member 20 (that is, in a direction parallel to the optical axis OA of the objective lens) via the worm 61, the worm wheel 92, and the gear 91. Thereby, both lens frames 14L and 14R (that is, objective lenses)
Also moves within the objective lens barrels 13L and 13R to perform focus adjustment. Even when the motor 60 continues to be driven beyond the range of movement of the lens frames 14L and 14R, the friction clutch gear 90 acts to rotate the small-diameter gear and the large-diameter worm wheel relative to each other. Excessive force acting on the lens frames 14L and 14R is prevented.

On the other hand, the diopter adjustment can be performed by operating the operating member 84 provided on the lower surface of the lower cover 70 in the left-right direction. That is, by operating the operation member 84 in the left-right direction, the feed screw 56 is rotationally driven via the rack member 80 and the gear 57, and the movable member 55 relatively moves back and forth with respect to the slider main body 52 to operate the operation arm 51A. , The relative position of the movable operation arm 55A in the front-rear direction changes, whereby the lens frame 14R on the telephoto optical system 10R side relatively moves with respect to the lens frame 14L on the telephoto optical system 10L side, and the left diopter is used as a reference. The diopter difference can be adjusted by moving the objective lens on the right telephoto optical system 10R side.

[0019]

As described above, according to the diopter difference adjusting mechanism for binoculars according to the present invention, the diopter difference can be adjusted using the focus adjusting mechanism, and the configuration can be simplified.

[Brief description of the drawings]

FIG. 1 is an external perspective view of binoculars to which an embodiment of a diopter difference adjusting mechanism for binoculars according to the present invention is applied.

FIG. 2 is a plan view thereof.

FIG. 3 is a side view thereof.

FIG. 4 is a bottom view thereof.

FIG. 5 is a sectional view taken along line AA of FIG. 3;

FIG. 6 is a plan view of the slider.

FIG. 7 is a longitudinal sectional view of a slider.

FIG. 8 is a sectional view taken along line BB of FIG. 6;

FIG. 9 is an exploded perspective view of a focus adjustment mechanism.

FIG. 10 is an explanatory diagram showing a configuration of a focus adjustment mechanism as viewed from the back side.

FIG. 11 is a sectional view taken along the line CC of FIG. 3;

[Explanation of symbols]

 10 (10L, 10R) ... telephoto optical system 14L ... lens frame (one objective lens frame) 14R ... lens frame (the other objective lens frame) 50 ... focus adjustment mechanism 51 ... slider (objective lens moving operation member) 51A ... operation Arm (engagement operation projection) 52 ... Slider body (operation member body) 55 ... Movable member 55A ... Moveable operation arm (engagement operation member) 56 ... Feed screw (feed screw) 57 ... Gear (gear) 60 ... Motor (focus) Adjustment driving means) 70: lower cover (binocular main body side fixing member) 80: rack member (feed screw rotation operation member) 84 ... operation member (feed screw rotation operation member) OA: objective lens optical axis

Claims (2)

(57) [Scope of request for utility model registration] 1. A binocular juxtaposed two telescopic optical system that the optical axis as a parallel, bi-by focusing driving means
Through the objective lens moving operation member moved driven relative to the eyeglass main body, said at moved to and performs focus adjustment of both telescopic optical system of the objective lens in its optical axis direction, the objective lens moving operation member , operating member body and the other of the optical axis direction relatively immovable engaged to the objective lens frame having an engaging portion that engages the relatively immovable in the optical axis direction in one of the objective lens frame
And can be moved relative to the operation member body in the optical axis direction.
And whether or not the relative movement in the optical axis direction with respect to the operation member body is possible.
Feeder rotatably supported and screwed with the engagement operation member.
And Rineji, and comprises a, in the fixed part of the binocular body, dioptric difference adjusting mechanism binoculars, characterized in that the feed screw rotation operating member for rotating the said feed screw is provided. Wherein said feed screw are gears fixed, the feed screw rotation operating member, said objective lens moving operation
A tooth engaged with the gear of the feed screw within a movement range of the member , wherein the feed screw rotation operating member is a fixing part of the binocular body.
Position to the fact that feeding is slidably supported in the direction of rotation of the screw, binoculars diopter difference adjusting mechanism according to claim 1, wherein the.