JPH10148764A - Binoculars - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a good visual field without generating such a situation that a scene behind an observer is projected on an eyepiece cover to be seen unwillingly by providing a transparent eyepiece cover which is arranged behind the optical axis and provided with a light transmissive part which is partly, or wholly formed into an inclined plane, or a curved surface to the optical axis. SOLUTION: The eyepiece cover 9 is constituted so that the light transmissive part 9a through which effective light passes may be formed to a plane inclined to a plane vertical to the optical axis 0 in the horizontal direction when in use. And the light 39 made incident on the eyepiece cover 9 from the outside of observer's face in the horizontal direction is reflected by the object side surface of the eyepiece cover 9, or the eye contact side surface of the cover 9, but, the light transmissive part 9a is installed with inclination, then, the light is not reflected toward the observer's eyes. there is no danger that the scene behind the observer is projected on the eyepiece lens cover 9 to be seen unwillingly, and the rightful image in the visual field of the binoculars is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to binoculars, and more particularly to binoculars having an eyepiece cover.

[0002]

2. Description of the Related Art Conventionally, binoculars have been proposed in which an eyepiece cover for protecting the eyepiece is disposed behind the optical axis of the eyepiece.

For example, Japanese Patent Application Nos. 8-92767 and 8-88518 disclose a lens barrel disposed inside an exterior member moving in a direction perpendicular to the optical axis. In the binoculars of the type that adjusts the interpupillary distance, the rear cover fixed to the exterior member as an eyepiece cover for preventing dust from entering the inside and preventing the eyepiece from being damaged is provided. Have been described.

[0004] Such a conventional eyepiece cover will be described with reference to FIG.

The eyepiece lens cover 9 'is a plate-like member formed of a transparent material such as acrylic, for example, in a planar shape, and its ends 9b' and 9c 'are used as exterior members by means such as bonding. Is fixed to the base plate 1 ′. At this time, the eyepiece cover 9 ′ is disposed such that the light transmitting portion 9 a ′ through which the effective light passes is perpendicular to the optical axis O.

[0006]

However, in the conventional eyepiece cover as described above, the light beam 39 'incident on the eyepiece cover 9' from outside the observer's face is
Reflected in the direction of the observer's eye by the objective side surface or the eyepiece side surface of the eyepiece cover 9 ', the observer sees the rear view on the eyepiece cover 9',
In some cases, it may hinder observation of an image in the original field of view of the binoculars.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pair of binoculars capable of obtaining a good visual field without a scene behind an observer being reflected on an eyepiece cover. And

[0008]

In order to achieve the above object, the binoculars according to the first invention comprise a pair of left and right lens barrels, an exterior member for covering the lens barrel, and an eyepiece of the lens barrel. And a transparent eyepiece cover which is disposed behind the optical axis on the side and in which a part or all of the light transmitting portion is formed in a plane or a curved surface inclined with respect to the optical axis.

Further, in the binoculars according to the second invention, at least a part of the light transmitting portion is formed so as to have a surface inclined with respect to the optical axis, and a light beam incident from the outside on the eyepiece side of the binoculars is formed. It is provided with an eyepiece cover configured so as not to be reflected in the direction of the observer's eyes.

Further, the binoculars according to a third aspect of the present invention include an objective optical system on which a light beam from an object to be observed enters and an eyepiece optical system for guiding the light beam from the objective optical system to an observer. A pair of left and right lens barrels, an exterior member that covers the lens barrel, and a part or all of the light transmitting portion supported by the exterior member behind the optical axis on the eyepiece side of the eyepiece optical system. A transparent eyepiece cover formed on a flat or curved surface inclined with respect to the axis.

Therefore, in the binoculars according to the first aspect of the invention, the exterior member covers the pair of left and right lens barrels, and the light beam of the transparent eyepiece cover disposed behind the optical axis on the eyepiece side of the lens barrel. Part or all of the transmitting portion is formed as a flat or curved surface inclined with respect to the optical axis.

Further, in the binoculars according to the second invention, at least a part of the light transmitting portion of the eyepiece cover is formed so as to have a surface inclined with respect to the optical axis. The incident light is not reflected in the direction of the observer's eyes.

Further, in the binoculars according to the third aspect of the present invention, in the pair of left and right lens barrels, light from an object to be observed enters the objective optical system, and the eyepiece optical system transmits light from the objective optical system to the observer. The exterior member covers the lens barrel, and a transparent eyepiece cover is supported by the exterior member behind the optical axis on the eyepiece side with respect to the eyepiece optical system, and a light transmitting portion of the eyepiece cover Is formed on a plane or a curved surface inclined with respect to the optical axis.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 11 show a first embodiment of the present invention. FIG. 1 is a plan view showing the appearance of the binoculars, FIG. 2 is a front view showing the binoculars from the objective lens side, and FIG. Rear view from the eyepiece side, FIG.
Is a bottom view showing the binoculars, and FIG. 5 is a side view showing the binoculars. 1 to 5 mainly show the appearance of binoculars.

As shown in FIGS. 1 to 5, the binoculars of the first embodiment are a binocular main body in which various internal mechanisms are arranged, and a base plate 1 constituting an exterior member is placed on an exterior member from above. The upper cover 2 is configured to cover the lower cover 3 serving as the exterior member from the lower side, and the side cover 4 serving as the exterior member from both sides.

The upper cover 2, the lower cover 3 and the like are formed to be thin while maintaining strength by a member such as a metal in order to reduce the size of the binoculars themselves.

The eyepiece lens group 23 (L,
R) (Here, 23L and 23R are collectively referred to as 23 (L,
R). Hereinafter, description will be made in the same manner. A distance knob 5 composed of a rotary operating member for focus adjustment is rotatably disposed substantially at the center of the surface on which the distance knob is disposed. A distance cover 36 is provided (see FIG. 3).

As shown in FIG. 4, an interpupillary knob 6 composed of a rotatable operation member for adjusting the interpupillary distance is provided substantially at the center of the lower surface of the lower cover 3. 6
A plurality of indices 3a indicating the position of the interpupillary distance are provided, for example, by engraving in the radial direction around the interpupillary knob 6 on the lower cover 3 surrounding the lower cover 3.

On the lower surface side of the lower cover 3, a plurality of convex portions 3 b forming a streak in the optical axis direction are provided on both sides of the interpupillary knob 6. The convex portion 3b is provided to improve portability and holding properties of the binoculars, and serves as a fingerhold when holding the binoculars with a hand.

On the lower surface side of the lower cover 3, a hole is formed in one side (the side where the right-eye eyepiece lens group 23R is disposed in FIG. 4). A diopter knob 7 composed of a slide-type operating member for diopter adjustment is provided in the hole so as to be slidable in a direction orthogonal to the optical axis. Indices 3c such as + (plus),-(minus), and a reference position (for example, indicated by a vertical line "|") are formed on the lower cover 3 near the diopter knob 7 by engraving or the like. Is provided.

On the other hand, as shown in FIG. 2, a protective member made of a transparent material is provided on the surface on which the objective lens group 18 (L, R), which is the objective optical system of the binoculars, is provided. The objective lens cover 8 is disposed to prevent, for example, dust and foreign matter from entering the inside of the binoculars from the outside.

Similarly, as shown in FIG. 3, the objective lens cover 8 and the eyepiece lens group 23 (L, R), which are the eyepiece optical systems of the binoculars, are provided An eyepiece lens cover 9 which is a protective member made of a similar transparent material is provided to prevent, for example, dust and foreign matter from entering the inside of the binoculars from the outside.

On the other hand, as shown in FIG. 5, on both sides of the binoculars, for example, a suspension ring 10 for attaching a strap or the like used when carrying the binoculars is provided.

The external appearance of the binoculars is configured as described above. Next, the internal configuration of the binoculars will be described.

FIG. 6 is an exploded perspective view schematically showing an internal mechanism including an optical system of the binoculars, and FIG. 7 is a plan sectional view of the left half showing the binoculars and a partial cross section of the right half with the upper cover 2 removed. FIG. 8 is a plan view in which the left half shows the binoculars with the upper cover 2 removed and the feeding mechanism part removed, and the left half shows a plan sectional view, and the right half shows a partial sectional view.
FIG. 9 is a sectional view taken along line AA of FIG.

First, the optical system of the binoculars will be described with reference to FIGS.

As shown in the figure, the lens barrel 11 (L, R), which is a pair of left and right lens barrels that holds and protects the optical system of the binoculars, is formed of a material such as metal or resin. A lens barrel objective section having an objective lens group 18 (L, R), an objective lens frame 17 (L, R), etc., a lens barrel body section 12 (L, R), and an eyepiece lens group 23 (L, R).
R) and a lens barrel eyepiece having eyepiece lens frames 22 (L, R) and the like.

The lens barrel body 12 (L, R) has a first
The prism 13 (L, R) and the second prism 14 (L, R
R) are disposed, and the first and second prisms 13 and 14 (L, R) are provided in the prism receiving member 1.
5, the lens barrel main body 12 by the prism spring 16 and the like.
It is fixed at a predetermined position in (L, R).

The front side of the lens barrel body 12 (L, R),
That is, the objective lens frame 17 (L, R) constituting the lens barrel objective section is disposed on the objective side, and the objective lens frame 17 (L, R) has a plurality of oval-shaped lenses. The objective lens group 18 (L, R) constituted by the above is held.

One end of the objective lens frame 17 (L, R) has a pair of objective axes 19 (L, R) which are focusing support axes extending in the same direction as the optical axis of the optical system. ) Are arranged.

One of the objective axes 19L (L, R) of the pair of objective axes 19 (L, R) is connected to one end thereof (the objective lens group 18L).
The front end of the lens barrel main body 1
2L, and the front end of the other end (the eyepiece lens group 23L side) is
It is fitted in the hole provided in 2L,
Positioning is performed so that the lens barrel objective section is moved by a predetermined amount in the optical axis direction.

The other one of the objective axes 19 (L, R) is opposite to the objective axis 19 L, and the tip of one end side (the objective lens group 18 R side) is connected to the lens barrel main body. The front end of the other end (the eyepiece lens group 23R side) is fitted into the hole provided in the lens barrel main body 12R via the T collar 20 while being fitted in the hole provided in the lens 12R. Accordingly, positioning is performed so that the lens barrel objective section is moved by a predetermined amount in the optical axis direction.

The objective shaft 19L is provided at one end thereof, and the objective shaft 19R is provided at its other end with objective springs 21 (L, R) which are spring members. One end of 21 (L, R) is engaged with the objective lens frames 17L, 17R, respectively, and the other end is fitted into a hole of the lens barrel body 12 (L, R). The T-collars 20 are engaged with each other.

The objective springs 21 (L, R) are
By applying a moment of force around the objective axis 19 (L, R), the objective lens frame 17 (L, R) is moved to the stopper member 1 provided on the bottom side of the lens barrel body 12 (L, R).
2a (L, R) (see FIG. 8) is always urged in the direction in which they come into contact with each other.

The objective lens frame 17 (L, R)
Is adapted to move in the optical axis direction of the optical system in conjunction with the focus adjustment mechanism and the diopter adjustment mechanism, whereby focus adjustment and diopter adjustment are performed.

On the other hand, on the rear side of the lens barrel body 12 (L, R), that is, on the eyepiece side, an eyepiece lens frame 22 (L, R) constituting a lens barrel eyepiece is formed by, for example, screws. The eyepiece frame 22 (L, R) is fixed to the lens barrel body 12 (L, R), and the eyepiece lens group 23 (L, R) formed of a plurality of oval-shaped lenses and the like is provided on the eyepiece frame 22 (L, R). And the eyepiece frame 22 (L,
A field stop 24 (L, R) is disposed in front of R).

The pair of left and right lens barrels 11 (L,
R) is perpendicular to the optical axis of the optical system of the binoculars,
First guide shaft 25 and second guide shaft 26 as guide members
Slidably guided (guided).

That is, the first guide shaft 25 is positioned in the optical axis direction by being fitted into holes provided on both side surfaces of the base plate 1. The second guide shaft 26 has one end adhered and fixed to the lens barrel body 12L and the other end slidably held with respect to the lens barrel body 12R. ing.

Then, the first guide shaft 25 and the second
The guide shafts 26 are arranged in a direction orthogonal to the optical axis of the optical system and parallel to each other.

Thus, when the interpupillary distance adjustment is performed,
The pair of left and right lens barrels 11 (L, R) moves along the first guide shaft 25 and the second guide shaft 26 to change the distance between each other, that is, the distance between the optical axes. You can do it.

As shown in FIG. 9, the second guide shaft 26 is sandwiched between the base plate 1 and the second guide shaft pressing member 27.
The pair of left and right lens barrels 11 with the guide shaft 25 as the center of rotation.
(L, R) is prevented from rotating.

A pair of left and right lens barrels 11 of such binoculars
(L, R) is covered from above by an upper plate 38 (L, R) as shown in FIG. 6, so that the internal optical system and mechanism are protected.

Next, a diopter adjustment mechanism and a focus adjustment mechanism in such binoculars will be described.

In the binoculars, diopter adjustment and focus adjustment are performed by retracting or extending the objective lens frame 17 (L, R) in the optical axis direction. R), two mechanisms, a diopter adjustment mechanism and a focus adjustment mechanism, are provided.
Classified into two mechanisms.

First, the diopter adjustment mechanism will be described.

When adjusting the diopter, the diopter knob 7
By performing the sliding operation of (1), the right objective lens frame is disposed at a substantially central portion of the binoculars by a feeding mechanism (see FIG. 7) which is a lens group moving means constituted by an objective screw 28 and the like. Only 17R is paid out or brought in. Thus, the right objective lens frame 17R
The diopter is adjusted by shifting the positions of the lens and the left objective lens frame 17L in the optical axis direction.

As shown in FIG. 7, a gear portion 7 b is integrally provided at one end of the diopter knob 7, and the gear portion 7 b meshes with a diopter gear 29. The diopter gear 29 is slidably fitted to the objective screw 28 that constitutes the above-mentioned feeding mechanism.
The diopter screw 30 fitted slidably in the middle of 8 is configured to be integral with the turning direction.

Thus, when the diopter knob 7 is slid, the gear portion 7b is slid, and the diopter gear 29 meshing therewith is rotated to integrally form the diopter. The screw 30 also rotates.

The right arm member 3 is attached to the diopter screw 30.
The right arm member 31a moves in the direction of the optical axis of the optical system in accordance with the turning operation of the diopter screw 30.

As shown in FIG. 7, the shaft member 3 implanted in the objective lens frame 17R is attached to the right arm member 31a.
One end of the 2R is engaged, and the objective lens frame 17R is moved in the optical axis direction in accordance with the movement of the right arm member 31a in the optical axis direction. Is being done.

Next, the focus adjustment mechanism will be described.

As shown in FIGS. 7 and 9, the distance knob 5 is inserted into a hole formed substantially in the center of the rear side (eyepiece side) of the base plate 1 and serves as a C-ring as a stopper. 33
Are rotatably disposed on the base plate 1 by fitting.

The distance knob 5 is provided with a female screw on the inner peripheral surface thereof, and is provided at the rear end (eyepiece side) of the objective screw 28 which constitutes a feeding mechanism which is a lens group moving means. It is designed to be screwed into a male screw that has been set.

The front end (object side) of the objective screw 28 is formed in an oval shape, and is formed in an oval shape formed in a fixing member 1 a provided on the base plate 1. By fitting into the hole, the rotation around the central axis is restricted, and the hole can be moved in the optical axis direction.

By rotating the distance knob 5 in this way, the objective screw 28 performs a retracting operation or an extending operation in the optical axis direction.

The objective screw 28 has a left arm member 3 attached thereto.
The left arm member 31b also moves in the optical axis direction in conjunction with the movement of the objective screw 28 in the optical axis direction.

The left arm member 31b includes the right arm member 3
1a, since one end of the shaft member 32L implanted in the objective lens frame 17L is engaged, the movement of the left arm member 31b in the optical axis direction causes the objective lens frame to move. 17L moves in the optical axis direction.

The left arm member 31b is urged by the objective spring 21L inserted through the objective shaft 19L of the objective lens frame 17L so as to always contact the objective screw 28 side.

On the other hand, the diopter gear 29 and the diopter screw 30
A diopter spring 34 is interposed between them, and one end of the diopter screw 30 has a flange portion 28a protruding in the middle of the objective screw 28 (see FIG. 9). , So that the right arm member 31a is positioned.

With this configuration, by rotating the distance knob 5, the objective screw 28 is moved in the optical axis direction, and the operation of extending and retracting the objective lens frame 17 (L, R) is performed. .

In this case, the left and right arm members 31
When the a and 31b move integrally in the same direction, the objective lens frame 17 (L, R) moves in the optical axis direction in conjunction therewith, and the same amount of extending or retracting operation is performed at the same time. Focus adjustment is performed.

On the other hand, as for the interpupillary distance adjustment, as shown in FIGS. 8 and 9, the distance between the pair of left and right lens barrels 11 (L, R) is changed by rotating the interpupillary knob 6. It is done by.

The interpupillary distance adjusting mechanism for adjusting the interpupillary distance will be described below.

As shown in FIGS. 8 and 9, the interpupillary knob 6 is rotatably supported on the base plate 1 by screws 35.

The interpupillary knob 6 has two cam grooves 6a.
These cam grooves 6a are respectively engaged with cam follower pins 12b (L, R) which are planted downward on the bottom surface side of the lens barrel body 12 (L, R). I agree.

Then, by rotating the interpupillary knob 6, the cam follower pins 12b (L, R) move along the cam grooves 6a, and in conjunction with the cam follower pins 12b (L, R), the lens barrel main body 12 (L) moves. , R) move.

At this time, the lens barrel body 12 (L, R)
The above described lens barrel 11 (L, R) is slidable in a direction orthogonal to the optical axis of the optical system by the two guide shafts of the first guide shaft 25 and the second guide shaft 26 as described above. , The lens barrels 11 (L, R) are moved in the direction of approaching or moving away from each other by the rotation of the interpupillary knob 6.

The objective lens frame 17 (L, R) is provided with an optical axis adjusting screw 37, the tip of which is provided on the bottom side of the lens barrel body 12 (L, R). The stopper member 12a (L, R). By rotating the optical axis adjusting screw 37, the objective lens frame 17 (L, R) can be rotated about the objective axis 19 (L, R) as a center of rotation. .

Thus, the optical axis can be adjusted in the direction perpendicular to the optical axis in the vertical direction. Although not shown, the optical axis adjusting mechanism of the binoculars can also adjust the optical axis in a direction perpendicular to the optical axis and in the left-right direction.

Next, the eyepiece cover 9 will be described with reference to FIG. FIG. 10 is an enlarged plan sectional view showing the eyepiece cover 9 attached to the right eye side.

The eyepiece cover 9 is a substantially plate-like member made of a transparent material such as acrylic, for example, and its ends 9b and 9c are bonded to the exterior member such as the base plate 1 by means of bonding or the like. It is fixed to.

Further, the eyepiece lens cover 9 is designed so that the light transmitting portion 9a through which the effective light passes is a plane inclined with respect to the plane perpendicular to the optical axis O in the left-right direction in the use state. Is configured such that the outer side of the binoculars than the center side is an inclined surface located on the rear side in the optical axis direction.

Next, the operation of the eyepiece lens cover 9 will be described with reference to FIG.

The light beam 39 incident on the eyepiece cover 9 from the left and right sides of the observer's face is reflected by the objective-side surface or the eyepiece-side surface of the eyepiece cover 9. Since 9a is provided at an angle, it does not reflect toward the observer's eyes. Thus, the observer does not see the rear view on the eyepiece cover 9 and can enjoy the image in the original field of view of the binoculars.

According to the first embodiment, since the scene behind the observer is not reflected on the eyepiece cover, the obstruction does not hinder the observation. You can enjoy the image inside.

FIG. 12 shows an eyepiece cover according to a second embodiment of the present invention, and is an enlarged vertical sectional view. In the second embodiment, a description of the same parts as those in the first embodiment will be omitted, and only different points will be mainly described.

The eyepiece cover 42 is a substantially plate-like member made of a transparent material such as acrylic, and its ends 42b and 42c are bonded to the exterior member such as the base plate 41 by bonding or the like. It is fixed to.

Further, the eyepiece lens cover 42 has a more detailed structure so that the light transmitting portion 42a through which the effective light passes is a plane inclined in the vertical direction in the use state with respect to the plane perpendicular to the optical axis O. Is configured such that the upper side of the binoculars is an inclined surface located on the rear side in the optical axis direction than the lower side.

According to the second embodiment, substantially the same effects as those of the first embodiment can be obtained, and in particular, the light incident from the upper side of the observer's face is reflected on the object side of the eyepiece cover. Even if the light is reflected on the surface of the eyepiece or the surface on the eyepiece side, it does not enter the eyes of the observer.

FIG. 13 shows the third embodiment of the present invention, and is an enlarged plan sectional view showing the eyepiece cover attached to the right eye side. In the third embodiment, description of the same parts as those in the first and second embodiments will be omitted, and only different points will be mainly described.

The eyepiece lens cover 44 is a substantially plate-like member made of a transparent material such as acrylic, and its ends 44b and 44c are bonded to the exterior member such as the base plate 1 by bonding or the like. It is fixed to.

Further, the eyepiece lens cover 44 has a light transmitting portion 44a through which the effective light passes, so that the light transmitting portion 44a has a curved surface that is inclined with respect to a surface perpendicular to the optical axis O in the left-right direction in the use state. Is configured such that the outer side of the binoculars than the center side is a curved surface located on the rear side in the optical axis direction, and is a curved surface slightly convex toward the front of the optical axis.

According to the third embodiment, substantially the same effects as those of the first embodiment are obtained, and the configuration is adapted to the shape near the eyes of the observer's face.
It should be easy to observe, and even if the light incident from the outside of the observer's face in the left-right direction is reflected on the objective-side surface or the eyepiece-side surface of the eyepiece cover, it should be less likely to enter the observer's eyes Can be.

FIG. 14 shows the fourth embodiment of the present invention, and is an enlarged longitudinal sectional view showing an eyepiece cover. In the fourth embodiment, the above-described first to third embodiments
The description of the same parts as those of the embodiment is omitted,
Only the differences will be mainly described.

The eyepiece lens cover 46 is a substantially plate-like member made of a transparent material such as acrylic, for example, and its ends 46b and 46c are attached to the exterior member such as the base plate 41 by means of bonding or the like. It is fixed to.

Further, the eyepiece lens cover 46 is designed in more detail so that the light transmitting portion 46a through which the effective light passes has a curved surface that is inclined with respect to the surface perpendicular to the optical axis O in the up-down direction in use. Is configured such that the upper side of the binoculars is a curved surface located on the rear side in the optical axis direction and the curved surface is slightly convex toward the front of the optical axis.

According to the fourth embodiment, substantially the same effects as those of the second embodiment can be obtained, and the light incident from the upper side of the observer's face can be applied to the object-side surface of the eyepiece cover. Alternatively, even if the light is reflected by the surface on the eyepiece side, it can be made harder to enter the eyes of the observer.

FIG. 15 shows the fifth embodiment of the present invention, and is an enlarged plan sectional view showing an eyepiece cover attached to the right eye side. In the fifth embodiment, a description of the same parts as those in the above-described first to fourth embodiments will be omitted, and only different points will be mainly described.

The eyepiece lens cover 48 is a substantially plate-like member made of a transparent material such as acrylic, and its ends 48b and 48c are bonded to the exterior member such as the base plate 1 by bonding or the like. It is fixed to.

Further, in the eyepiece cover 48, the light transmitting portion 48a through which the effective light passes is such that the left half is a plane substantially perpendicular to the optical axis O and the right half is In more detail, the right half is a curved surface located outside the center side of the binoculars on the rear side in the optical axis direction so as to be a curved surface inclined with respect to a plane perpendicular to the optical axis O, and It is configured to have a curved surface slightly convex toward the front of the optical axis.

According to the fifth embodiment, substantially the same effects as in the third embodiment can be obtained.

FIG. 16 shows the sixth embodiment of the present invention, and is an enlarged longitudinal sectional view showing an eyepiece cover. In the sixth embodiment, the above-described first to fifth embodiments are described.
The description of the same parts as those of the embodiment is omitted,
Only the differences will be mainly described.

The eyepiece cover 52 is a substantially plate-like member made of a transparent material such as acrylic, and its ends 52b and 52c are bonded to the exterior member such as the base plate 41 by means of bonding or the like. It is fixed to.

Further, in the eyepiece cover 52, the light transmitting portion 52a through which the effective light passes is such that the lower half is a plane substantially perpendicular to the optical axis O and the upper half is the upper half in the vertical direction in use. More specifically, the upper half of the upper half is a curved surface located on the rear side in the optical axis direction from the lower side of the binoculars so that the curved surface is inclined with respect to a plane perpendicular to the optical axis O, and It is configured to have a curved surface slightly convex toward the front of the optical axis.

According to the sixth embodiment, substantially the same effects as those of the fourth embodiment can be obtained.

FIGS. 17 and 18 show a seventh embodiment of the present invention. FIG. 17 is an enlarged plan sectional view showing an eyepiece cover, and FIG. 18 is a front view showing the eyepiece cover. In the seventh embodiment, a description of the same parts as those in the above-described first to sixth embodiments will be omitted, and only different points will be mainly described.

The eyepiece lens cover 54 is a substantially plate-like member made of a transparent material such as acrylic, for example, and its ends 54b and 54c are attached to the exterior member such as the base plate 51 by means of bonding or the like. It is fixed to.

Further, the eyepiece cover 54 is designed so that the entire light transmitting portion 54a through which the effective light passes has a curved surface rotationally symmetric with respect to the rotational symmetry axis 55 parallel to the optical axis O. Are formed on the curved surface so as to be located rearward in the optical axis direction as the distance from the rotational symmetry axis 55 increases. Needless to say, the curved surface is set to have such a curvature that light reflected on the object side surface or the eyepiece side surface of the eyepiece cover 54 does not enter the eyes of the observer.

According to the seventh embodiment, even if the light incident from the outer sides of the observer's face in the vertical and horizontal directions is reflected by the objective-side surface or the eyepiece-side surface of the eyepiece cover,
It does not enter the observer's eyes. In this way, the scene behind the observer is not reflected on the eyepiece cover, so that it does not hinder the observation, and the user can enjoy the image in the original field of view of the binoculars.

FIGS. 19 and 20 show an eighth embodiment of the present invention. FIG. 19 is an enlarged plan sectional view showing an eyepiece cover attached to the left eye side, and FIG. FIG. In the eighth embodiment, description of the same parts as those in the first to seventh embodiments will be omitted, and only different points will be mainly described.

The eyepiece cover 56 is a substantially plate-like member made of a transparent material such as acrylic, and its ends 56b and 56c are bonded to the exterior member such as the base plate 1 by bonding or the like. It is fixed to.

Further, in the eyepiece cover 56, substantially the left half of the light transmitting portion 56a through which the effective light passes is rotationally symmetric with respect to the rotational symmetry axis 57 parallel to the optical axis O in the left-right direction in the use state. On the curved surface 56e, substantially the right half is formed on a plane 56d perpendicular to the optical axis O.

More specifically, the curved surface 56e is formed as a curved surface that is located on the rear side in the optical axis direction as the distance from the rotational symmetry axis 57 increases, and in this embodiment, the rotational symmetry axis 57 is Eyepiece cover 56
It is set so that it is located outside.

The curved surface 56e has such a curvature that the light reflected on the object side surface or the ocular side surface of the eyepiece lens cover 56 does not enter the eyes of the observer, and has an uncomfortable feeling with the flat surface 56d. Is set to the curvature that is connected.

According to the eighth embodiment, even if the light incident from the outer side of the observer's face mainly in the left-right direction is reflected by the objective-side surface or the eyepiece-side surface of the eyepiece cover, the observation is performed. Not in the eyes of others. In this way, since the scene behind the observer is not reflected on the eyepiece cover, it does not hinder the observation, and the user can enjoy the image in the original field of view of the binoculars.

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

(1) A pair of left and right lens barrels, an exterior member that covers the lens barrel, and a part of the light transmitting portion that is disposed behind the optical axis on the eyepiece side of the lens barrel. Binoculars comprising: a transparent eyepiece cover formed entirely on a flat surface or a curved surface with respect to the optical axis.

(2) At least a part of the light transmitting portion is formed so as to have a surface inclined with respect to the optical axis, and the light incident from the outside on the eyepiece side of the binoculars is directed toward the eyes of the observer. Binoculars comprising an eyepiece cover configured to be non-reflective.

(3) A pair of left and right lens barrels having an objective optical system on which light rays from an object to be observed enter and an eyepiece optical system for guiding the light rays from the objective optical system to the observer side. An exterior member covering the lens barrel, supported by the exterior member on the optical axis rear side closer to the eyepiece side than the eyepiece optical system, and part or all of the light transmitting portion is inclined with respect to the optical axis. Binoculars, comprising: a transparent eyepiece cover formed in a flat or curved surface.

(4) In the supplementary notes (1), (2) and (3), the inclination is an inclination of the binoculars in the left-right direction.

(5) In the supplementary note (4), the above-mentioned inclination is such that the outer side is the rear side in the optical axis direction from the center side of the binoculars.

(6) In Supplementary Notes (1), (2) and (3), the above-mentioned inclination is a vertical inclination of the binoculars.

(7) In the supplementary note (6), the above-mentioned inclination is an inclination in which the upper side is the rear side in the optical axis direction from the lower side of the binoculars.

(8) In the supplementary notes (1), (2), and (3), the curved surface is a rotationally symmetric curved surface with respect to a rotationally symmetric axis parallel to the optical axis.

(9) In the supplementary notes (1), (2) and (3), the eyepiece covers are provided so as to be symmetrical to each other provided in a pair on the right and left sides.

[0116]

As described above, according to the binoculars of the present invention, a good view can be obtained without the rear view of the observer being reflected on the eyepiece cover.

[Brief description of the drawings]

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

FIG. 2 is a front view showing the binoculars of the first embodiment as viewed from an objective lens side.

FIG. 3 is a rear view showing the binoculars according to the first embodiment from the eyepiece side.

FIG. 4 is a bottom view showing the binoculars of the first embodiment.

FIG. 5 is a side view showing the binoculars of the first embodiment.

FIG. 6 is an exploded perspective view schematically showing an internal mechanism including an optical system of the binoculars according to the first embodiment.

FIG. 7 is a plan view showing the binoculars of the first embodiment, with a left half being a plan cross-sectional view and a right half including a partial cross-section with an upper cover removed.

8 is a plan view showing a state in which a feeding mechanism is removed from the binoculars shown in FIG. 7, a left half showing a plan sectional view, and a right half showing a partial cross section.

FIG. 9 is a sectional view taken along the line AA of FIG. 7;

FIG. 10 is an enlarged plan sectional view showing the eyepiece cover attached to the right eye side in the first embodiment.

FIG. 11 is an enlarged plan sectional view for explaining the operation of the eyepiece lens cover of the first embodiment.

FIG. 12 is an enlarged vertical sectional view showing an eyepiece cover according to a second embodiment of the present invention.

FIG. 13 is an enlarged plan sectional view showing an eyepiece cover attached to a right eye side in a third embodiment of the present invention.

FIG. 14 is an enlarged longitudinal sectional view showing an eyepiece cover according to a fourth embodiment of the present invention.

FIG. 15 is an enlarged plan sectional view showing an eyepiece cover attached to the right eye side in a fifth embodiment of the present invention.

FIG. 16 is an enlarged vertical sectional view showing an eyepiece cover according to a sixth embodiment of the present invention.

FIG. 17 is an enlarged plan sectional view showing an eyepiece cover according to a seventh embodiment of the present invention.

FIG. 18 is a front view showing the eyepiece cover of the seventh embodiment.

FIG. 19 is an enlarged plan sectional view showing an eyepiece cover attached to a left eye side in an eighth embodiment of the present invention.

FIG. 20 is an exemplary front view showing the eyepiece cover according to the eighth embodiment;

FIG. 21 is a plan sectional view showing an eyepiece lens cover of conventional binoculars.

[Explanation of symbols]

1, 41, 51: Base plate (exterior member) 2: Upper cover (exterior member) 3: Lower cover (exterior member) 4: Side cover (exterior member) 9, 42, 44, 46, 48, 52, 54, Reference numeral 56: eyepiece cover 9a, 42a, 44a, 46a, 48a, 52a, 54a, 56a: light transmitting portion 11L, 11R: lens barrel (lens barrel) 18L, 18R: objective lens group (objective optical system) 23L, 23R ... eyepiece lens group (eyepiece optical system) 55, 57 ... rotational symmetry axis O ... optical axis

Claims (3)

[Claims] 1. A pair of left and right lens barrels, an exterior member for covering the lens barrel, and a part or all of a light transmitting portion disposed behind an optical axis on the eyepiece side of the lens barrel. Binoculars comprising: a transparent eyepiece cover formed on a flat or curved surface inclined with respect to the optical axis. 2. A light transmitting part, wherein at least a part of the light transmitting part is formed so as to have a surface inclined with respect to the optical axis, and a light ray incident from the outside on the eyepiece side of the binoculars is reflected in the direction of the observer's eyes. Binoculars comprising an eyepiece cover configured to prevent the eyepiece from being worn. 3. A pair of left and right lens barrels having an objective optical system on which light rays from an object to be observed are incident and an eyepiece optical system for guiding the light rays from the objective optical system to the observer side. An exterior member that covers the lens barrel, a plane that is supported by the exterior member behind the optical axis that is closer to the eyepiece side than the eyepiece optical system, and that a part or all of the light transmitting portion is inclined with respect to the optical axis; Or a transparent eyepiece cover formed on a curved surface.