JPH08327912A - Binoculars - Google Patents

Abstract

PURPOSE: To miniaturize binoculars in the pupil distance direction by providing it with a specified objective window, a specified eyepiece window, an optical axes distance change means and a blindfold means. CONSTITUTION: A second optical system for the right eye is provided with an objective lens 1R, a prism 2R and an eyepiece group 3R. A first optical system for the left eye is provided with an objective lens 1L, a prism 2L and an eyepiece group 3L. Then, the first and the second optical systems are arranged in a housing 8 and the housing 8 is provided with the objective windows 82L and 82R and the eyepiece windows 83L and 83R corresponding to the first and the second optical systems. By the optical axes distance change means, an optical axes distance between the first and the second optical systems arranged in the housing 8 is changed according to the pupil distance of an observer within the range of the windows 82L and 82R and the windows 83L and 83R. Besides, the blindfold means 311L, 311R, 312L, 312R, 411L and 411R are provided with a part elastically deformed by interlocking with the change of the optical axes distance and a shielding part for preventing the inside of the housing 8 from being viewed from the windows 82L and 82R or the windows 83L and 83R.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to binoculars, and more particularly, to binoculars having a first optical system for the left eye and a second optical system for the right eye which are arranged in a housing.

[0002]

As is well known, the distance between the human eyes,
That is, the pupil distance varies depending on age, sex, and other individual differences. For this reason, in the binoculars, in order to be able to deal with users having various pupil distances,
It is necessary to provide a mechanism for adjusting the distance between the pair of left and right optical systems.

Such an interpupillary adjustment is moved in a direction in which the first optical system for the left eye and the second optical system for the right eye, which are arranged in the housing of the binoculars, come close to or away from each other. Various things have heretofore been proposed.

As an example of such a device, for example, in Japanese Patent Laid-Open No. 4-116614, a first lens barrel holding a first optical system for the left eye and a second optical system for the right eye are disclosed. And a guide shaft for guiding the first lens barrel and the second lens barrel in a direction perpendicular to the optical axis during the interpupillary adjustment, Binoculars including an urging unit that presses the second lens barrel in a predetermined direction with respect to the guide axis and suppresses an optical axis shift that occurs when adjusting the interpupillary distance are described.

An example of such conventional binoculars will be described with reference to FIG.

The binoculars have a first optical system for the left eye and a second optical system for the right eye, and the second optical system for the right eye has an objective side along the optical axis. The objective lens 1R,
Similarly, the second optical system for the left eye includes the objective lens 1L, the prism 2L, and the eyepiece lens group 3 in order from the objective side along the optical axis.
It is configured to have L.

The pair of left and right optical systems are incorporated in a base plate 8 ', and objective windows 82R', 82L 'through which light enters the base plate 8'and the eyepiece lens group 3
Eyepiece window 83R 'through which the light emitted from R and 3L passes,
And 83L 'are formed respectively.

Front plates 4R 'and 4L' are provided at positions further to the front of the objective lenses 1R and 1L, and the objective windows 82R 'and 8R are provided even when the interpupillary adjustment is performed.
It functions as a blindfold so that the inside of the binoculars cannot be seen from 2L '.

The eyepiece lens groups 3R and 3L are respectively incorporated in eyepiece frames 31R 'and 31L', and the blindfold portion 3 is provided on the rear end side of the eyepiece frames 31R 'and 31L'.
11R 'and 311L' are provided, and the eyepiece window 83 is provided.
The inside of the binoculars cannot be seen from R'and 83L '.

Thus, in either case, the second optical system for the right eye and the first optical system for the left eye are separated from each other to Amax, or are close to each other to become Amin. Even so that the inside of the binoculars cannot be seen, the front plates 4R ′, 4L and the blindfold portion 311 that perform the function of blindfolding.
R ′ and 311L ′ are provided so as to extend laterally by a length C that is larger than half the amount of movement of each optical system in the interpupillary adjustment.

[0011]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the conventional binoculars as described in Japanese Patent No. 614, as described with reference to FIG. 7 above, the blindfold portion and the like must greatly extend in the interpupillary direction. However, the size of the base plate and the exterior for housing the same is restricted in the same direction, that is, the binoculars are enlarged in the width direction of the eye.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide binoculars which can be miniaturized in the interpupillary direction.

[0013]

In order to achieve the above object, the binoculars of the present invention according to claim 1 include a first optical system for the left eye and a second optical system for the right eye, which are arranged in a housing. And an objective window and an eyepiece window provided in the case corresponding to the first and second optical systems, and the binoculars having the optical system The optical axis distance changing means that can change the optical axis distances of the first and second optical systems within the range of the objective window and the eyepiece window, and elastically deforms in association with the change of the optical axis distance. And a shielding portion for preventing the inside of the casing from being seen through at least one of the objective window and the eyepiece window.

The binoculars of the present invention according to claim 2 are:
The blindfold means is provided in at least one of the lens barrel portion of the optical system and the inside of the housing.

Further, the binoculars of the present invention according to claim 3 are the one according to claim 2, wherein the blindfold means is made of a soft film or cloth-like rubber.

[0016]

In the binoculars of the present invention according to claim 1, the first optical system for the left eye and the second optical system for the right eye are arranged in the housing, and the first and second optical systems are provided. Correspondingly, an objective window and an eyepiece window are provided in the casing, and the optical axis distance changing means is arranged between the optical axes of the first and second optical systems arranged in the casing according to the eye width of the observer. Within the range of the objective window and the eyepiece window, and the inside of the housing can be seen from at least one of the objective window and the eyepiece window where the blindfold means elastically deforms in association with the change in the distance between the optical axes. And a shielding portion for preventing

The binoculars of the present invention according to claim 2 are:
The blindfold means is provided on at least one of the lens barrel of the optical system and the inside of the housing.

Further, in the binoculars of the present invention according to claim 3, the blindfold means is constituted by a soft film or cloth-like rubber.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show one embodiment of the present invention, FIG. 1 is a plan sectional view showing binoculars, and FIG. 2 is an exploded perspective view showing the binoculars.

In the binoculars, the second optical system for the right eye is incorporated in the lens barrel body 5R as the lens barrel portion, and the first optical system for the left eye is incorporated in the lens barrel body 5L as the lens barrel portion. The second optical system for the right eye is configured to have the objective lens 1R, the prism 2R, and the eyepiece lens group 3R in this order from the objective side along the optical axis OR, and similarly, the first optical system for the left eye. The system comprises an objective lens 1L, a prism 2L, and an eyepiece lens group 3L in order from the objective side along the optical axis OL.

The objective lenses 1R and 1L are the objective frame 11
The objective frames 11R and 11L are respectively incorporated and held in the R and 11L, and the objective frames 11R and 11L respectively include objective frame axes 111R and 111L extending in the optical axis direction.

The objective frame shafts 111R and 111L have front end portions which are holes 41R and 41L of front plates 4R and 4L described later.
In addition, the rear ends of the holes 51R, 51 of the lens frame bodies 5R, 5L are
It is inserted in L and is positioned so that it can be moved by a certain amount in the optical axis direction.

Further, the objective frames 11R and 11L are provided by the objective springs (not shown) by the objective frame shafts 111R and 111L.
By applying the moment of the surrounding force, the lens frame bodies 5R and 5L are positioned in the rotational direction with which they are applied.

The objective frames 11R and 11L are
It is connected to a focus mechanism (not shown), and is moved in the optical axis direction in conjunction with the focus mechanism to adjust the focus position.

The front plates 4R and 4L are the objective lens 1
The lens frame bodies 5R and 5 are provided at positions further forward of the R and 1L.
Long holes 42R, 42L fixed to L and through which light enters
And the objective frame shafts 111R and 111L.
The holes 41R and 41L into which the front end portions of the above are inserted, and the blindfold portions 411R and 411L that are laterally extending blindfold means.

The prisms 2R and 2L are the lens frame body 5
They are fixed at predetermined positions of R and 5L, respectively.

The eyepiece lens groups 3R and 3L are respectively incorporated in eyepiece frames 31R and 31L, and these eyepiece frames 31R and 31L are positioned and fixed to the lens frame bodies 5R and 5L.

The eyepiece frame 31R is a blindfold portion 31 which is a blindfold means extending outside the rear end portion in the eye width adjusting direction.
1R is fixed to the inside with the blindfold portion 312R, which is the same blindfold means.

In the eyepiece frame 31L, a blindfold portion 311L, which is a blindfold means extending outside the rear end portion in the eye width adjusting direction, and an inside blindfold portion 312, which is a blindfold means, are provided.
L is adhered and fixed.

The respective blindfolds 311R, 311L, 31
2R, 312L, 411R, and 411L are made of, for example, a soft film such as a light-shielding polyester film or a cloth-like rubber.

From the eyepiece frames 31R and 31L, field rings 32R and 32L for restricting the field of view are provided forward, respectively.

The lens frame body 5R incorporating the second optical system for the right eye and the lens frame body 5L incorporating the first optical system for the left eye as described above are perpendicular to the optical axes OR and OL. By the long shaft 6 and the short shaft 7 arranged in the interpupillary distance adjustment direction, the long shaft 6 and the short shaft 7 are movably supported in a direction in which they approach each other or a direction in which they separate from each other.

That is, holes 52R and 52L into which the long shaft 6 is inserted are formed at the bottom of the lens frame bodies 5R and 5L.
An elliptical hole 53R into which the short shaft 7 is slidably inserted and a press-fitted and fixed 53L are bored.

By the long shaft 6 and the short shaft 7, the positions of the lens frame bodies 5R and 5L, that is, the right optical axis OR
And the parallelism of the left optical axis OL is determined.

Each of the above components is incorporated in the main plate 8 which is a casing. The base plate 8 is formed by vertically arranging walls from four sides on a substantially rectangular plate-shaped member, and objective windows 82R and 82L through which light is incident on the front side are emitted from the eyepiece lens groups 3R and 3L on the rear side. Eyepiece window 83R through which
83L are respectively drilled.

A circular hole 86 for attaching the focus adjusting mechanism is formed in the wall portion between the elongated holes 83R and 83L, and an elongated plate member 85 is arranged from the vicinity of the circular hole 86 toward the front. It is set up. The plate member 85 is formed with an escape recess 851 on which the long shaft 6 is placed.

The long shaft 6 is made up of the lens frame body 5R,
After being inserted through the 5L holes 52R, 52L, they are further fitted into the holes 81R, 81L formed in the wall portion of the main plate 8 for positioning.

In the vicinity of the front end portion of the plate member 85, the short shaft 7 is engaged and the convex portion 83 is regulated in the height direction.
Is provided.

A circular hole 84 is formed in a substantially central portion of the bottom surface of the base plate 8 so that an eye width knob 9 as a means for changing the distance between the optical axes can be rotatably attached.

The interpupillary knob 9 is rotatably mounted around the shaft hole 92 by fitting a rotary shaft (not shown) into the shaft hole 92, and further, is projected from the bottom surface of the lens frame body 5R. A cam groove 91R engaged with a cam follower (not shown) and a 91L engaged with a cam follower (not shown) protruding from the bottom surface of the lens frame body 5L are formed.

A biasing means (not shown) is attached to the main plate 8 to attach the lens frame bodies 5R and 5L to the short shaft 7.
The rotation of the lens frame main bodies 5R and 5L is regulated by abutting against.

An exterior member (not shown) is attached to the base plate 8.

The main plate 8 has guide shafts 103R and 103L as guide means at the front corners, and guide shafts 101R and 10L as guide means at the rear corners.
In the vicinity of the circular hole 86, the guide shafts 102R and 102L, which serve as the guide means, are planted in 1L.

Of these, the guide shafts 101R, 1R
01L is for guiding the blindfolds 311R and 311L to be bent along the side wall when adjusting in the direction of widening the pupil, and the blindfold 311
R portions 87R and 87L as guide means are formed at the side wall portions where the R and 311L abut.

Further, the guide shafts 103R and 103L
Is the blindfold part 4 when adjusting in the direction to widen the pupil distance.
11R and 411L are for guiding the bending along the side wall portions, and the blindfold portions 411R and 41
A guide means R is provided on the side wall portion where 1L abuts.
Portions 89R and 89L are formed.

On the other hand, the guide shafts 102R and 102L
Is for guiding the blindfolds 312R and 312L to be bent along the wall formed by being inclined in the vicinity of the circular hole 86 when performing adjustment in the direction of narrowing the interpupillary distance. Further, R portions 88R and 88L as guide means are formed at the portions of the wall portions with which the blindfold portions 312R and 312L abut.

Next, the operation of the binoculars of this embodiment will be described.

The interpupillary distance adjustment is performed by rotating the interpupillary distance knob 9.

When the eye width knob 9 is rotated, the lens barrel body 5 engaged with the cam grooves 91R and 91L of the eye width knob 9 is rotated.
By the cam followers (not shown) of R and 5L, the lens frame bodies 5R and 5L are moved along the long shaft 6 in directions opposite to each other, that is, in a direction in which they approach each other or a direction in which they separate from each other.

First, the eye width is widened, and the distance between the optical axis OL of the first optical system for the left eye and the optical axis OR of the second optical system for the right eye is the maximum, and Amax in FIG. I will explain when.

When the width of the eyes starts to be widened, the blindfold portion 311
The R and 311L are started to bend along the R portions 87R and 87L of the wall portion of the main plate 8, and as shown in FIG.
The front end portion inserted between 87L and the guide shafts 101R and 101L extends forward.

Similarly, the blindfolds 411R and 411L are
Bending is started along the R portions 89R and 89L of the wall portion of the main plate 8, and as shown in FIG. 5, the tip portion inserted between the R portions 89R and 89L and the guide shafts 103R and 103L extends rearward. Be done.

Further, at this time, the blindfold portions 312R, 312R, 3
As shown in FIG. 3, 12L is in a state of being straightly extended, and is in a state in which only the tip portion is bent through between the wall portion of the main plate 8 and the guide shafts 102R and 102L.

Next, as the interpupillary distance is narrowed, the distance between the optical axis OL of the first optical system for the left eye and the optical axis OR of the second optical system for the right eye is minimized. The case when the time reaches Amin will be described.

When the interpupillary begins to be narrowed, the blindfold portion 312
R and 312L are started to bend along the R portions 88R and 88L of the wall portion of the main plate 8, and as shown in FIG.
The tip portion inserted between 88L and the guide shafts 102R and 102L extends obliquely forward along the side wall.

At this time, the blindfold portions 311R, 311R, 3
As shown in FIG. 4, 11L is in a straightly extended state, and only the tip end portion is bent through between the side wall portion of the main plate 8 and the guide shafts 101R and 101L. .

Similarly, the blindfolds 411R and 411L are
As shown in Figure 6, it is in a straight stretched state,
Only the tip portion is the side wall portion of the main plate 8 and the guide shaft 103.
It is in a state of being bent through between R and 103L.

The insides of the front plates 4R and 4L function as a blindfold without flexibility, but unlike the blindfolds 312R and 312L on the inside of the eyepiece side, members that interfere in the moving direction, etc. It does not have to be flexible because it does not.

In the above description, the blindfolds 3 are provided on both sides of the eyepiece side.
Although 11R and 311L and the blindfold portions 312R and 312L are provided, only the outside may be used if there is no interference.

According to such an embodiment, the second eyepiece for the right eye is used.
The lens frame body incorporating the above optical system and the lens frame body incorporating the first optical system for the left eye are provided with flexible eye blind portions, respectively, and the eye blind portions at the time of adjusting the interpupillary distance. Since the lens is bent, the width of the binoculars can be shortened and the size can be reduced.

In addition, the wall of the main plate with which the blindfold portion abuts has an R
Since the blind part is provided and a guide shaft is arranged in the vicinity of this R part to bend and guide the blindfold at a desired position, the blindfold moves smoothly and the appearance is good. Becomes

[Additional Notes] According to the above-described embodiment of the present invention as described in detail above, the following configuration can be obtained.

(1) Within the range of the objective window and the eyepiece window provided in the housing, the first and the second arranged in the housing.
The binoculars capable of changing the interpupillary distance of the observer by moving the lens barrels in a direction away from each other or in a direction approaching each other are provided on at least one of the objective side and the eyepiece side of the lens barrel to change the interpupillary distance. In this case, a blindfold having a portion that elastically deforms by the inner wall of the lens barrel to allow the movement of the lens barrel and a shielding portion that prevents the inside of the housing from being visible from at least one of the objective window and the eyepiece window. And binoculars.

(2) The binoculars according to appendix 1, wherein the blindfold means is made of a soft film or cloth-like rubber.

(3) The binoculars according to appendix 1, further comprising guide means for guiding the blindfold means when changing the interpupillary distance.

[0066]

As described above, according to the present invention, the binoculars can be miniaturized in the interpupillary direction.

[Brief description of drawings]

FIG. 1 is a plan sectional view showing binoculars according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing the binoculars of the above embodiment.

FIG. 3 is a plan sectional view showing a bent state of a blindfold portion on the eyepiece side when the eye width is widened in the binoculars of the embodiment.

FIG. 4 is a plan sectional view showing a bent state of a blindfold portion on the eyepiece side in the binoculars of the above-mentioned embodiment when the width of the eye is narrowed.

FIG. 5 is a plan cross-sectional view showing a bent state of a blindfold portion on the object side when the eye width is widened in the binoculars of the above embodiment.

FIG. 6 is a plan cross-sectional view showing a bent state of a blindfold portion on the object side when the pupil distance is narrowed in the binoculars of the above-described embodiment.

FIG. 7 is a plan sectional view showing conventional binoculars.

[Explanation of symbols]

1R, 1L ... Objective lens 101R, 101L, 102R, 102L, 103R, 103L ... Guide shaft (guide means) 2R, 2L ... Prism 3R, 3L ... Eyepiece group 311R, 311L, 312R, 312L, 411R, 411L ... Blindfold Part (blindfold means) 5R, 5L ... Lens frame main body (lens section of optical system) 6 ... Long shaft 7 ... Short shaft 8 ... Main plate (housing) 82R, 82L ... Objective window 83R, 83L ... Eyepiece window 87R, 87L, 88R, 88L, 89R, 89L ... R
Part (guide means) 9 ... Eye width knob (means for changing distance between optical axes) OR, OL ... Optical axes

Claims (3)

[Claims] 1. Binoculars having a first optical system for the left eye and a second optical system for the right eye arranged in a housing, wherein the binoculars correspond to the first and second optical systems. The objective window and the eyepiece window provided in the housing, and the first window arranged in the housing according to the eye width of the observer.
And an optical axis distance changing means capable of changing the optical axis distance of the second optical system within the range of the objective window and the eyepiece window; and a portion elastically deformed in association with the change of the optical axis distance.
Binoculars comprising: a blindfold means having a shielding portion that prevents the inside of the housing from being seen through at least one of the objective window and the eyepiece window. 2. The binoculars according to claim 1, wherein the blindfold means is provided on at least one of the lens barrel portion of the optical system and the inside of the housing. 3. The binoculars according to claim 2, wherein the blindfold means is made of a soft film or cloth-like rubber.