JP2000137170A - Porro two-type real image binoculars - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide binoculars equipped with a lens barrier which does not largely project from the housing of binoculars, so that it hardly becomes a hindrance and does not spoil the outside appearance. SOLUTION: The Porro two-type real image binoculars 10 are equipped with the lens barrier 50 in a space between an ocular 24 and a focusing ring 14. The lens barrier 50 is provided with a barrier member 54 for protecting the ocular 24, and a supporting part 52 movably supporting the member 54. The member 54 is movably connected to the supporting part 52 by a pair of pins 60 and a pair of barrier rails 72 housing the pins 60. The supporting part 52 of the lens barrier 50 is positioned in the space between the ocular 24 and the ring 14, and the member 54 is moved to the retreat position between the ocular 24 and the ring 14. The member 54 moved to the retreat position is held by a pair of holding parts 74 provided in the supporting part 52.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to binoculars having a lens barrier for protecting a lens.

[0002]

2. Description of the Related Art In general, when binoculars are stored with an objective lens and an eyepiece exposed outside, there is a possibility that dust, grease or the like may adhere to the surface of the lens, and the dust or grease is wiped off. In this case, the lens surface may be damaged.

[0003] Therefore, when storing the binoculars, usually,
The objective lens and the eyepiece are covered with a lens cap that is a lens protection member. A general lens cap is formed of a component separate from the binocular body, and is appropriately attached to the binocular body. After being removed for use, the lens cap is stored separately by the user, and is attached to the binoculars again when storing the binoculars. For this reason, there is a disadvantage that this type of lens cap is often lost during use of the binoculars.

[0004]

As a measure for solving such a problem, there has been proposed a pair of binoculars provided with a lens barrier composed of a barrier member for covering the lens and a supporting portion for movably supporting the barrier member. ing. In this lens barrier, the supporting portion is fixed to the binocular housing, and the barrier member is moved between a protection position for covering the lens and a retracted position for completely exposing the lens. Preferably, the lens barrier does not protrude significantly from the binocular housing. This is because the lens barrier that protrudes greatly from the binocular housing not only impairs the appearance of the binoculars, but also interferes with the operation of the binoculars, causes damage by contacting other people, and becomes a bulky factor during storage. .

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a lens barrier which does not greatly protrude from a binocular housing, and therefore hardly obstructs the appearance of the lens barrier. It is to provide binoculars provided with.

[0006]

SUMMARY OF THE INVENTION A Polo type 2 real image binocular according to the present invention has a first optical system including a first lens and a first prism, and a first optical system including a second lens and a second prism. It has a second optical system and a lens barrier for protecting the first lens, and the lens barrier includes a barrier member for covering the first lens, and a support portion for movably supporting the barrier member. The support portion is located in a space between the first lens and the second prism, and the barrier member is moved to a retracted position located in a space between the first lens and the second prism.

In one embodiment, the first optical system is an eyepiece optical system, so that the first lens is an eyepiece, the first prism is an eyepiece, and the second optical system is an eyepiece. In the objective optical system, the second lens is an objective lens, and the second prism is an objective prism.

In another embodiment, the first optical system is an objective optical system, so that the first lens is an objective lens, the first prism is an objective prism, and the second optical system is The eyepiece optical system, and accordingly, the second lens is an eyepiece and the second prism is an eyepiece prism.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing an embodiment according to the present invention, a general configuration of a polo type 2 real image type binocular will be described with reference to FIGS. As shown in FIG. 8, the polo type 2 real image type binoculars 10 includes a pair of lens barrels 12 connected in a hinge shape and a focus ring 14 for adjusting focus. Each lens barrel 12 includes an objective lens 22, an objective prism 26, an eyepiece prism 28, and an eyepiece 24.

As shown in FIGS. 9 to 11, the objective lens 22 includes an objective lens system 32 including a plurality of lenses, and the eyepiece 24 includes an objective lens system 34 including a plurality of lenses. The objective lens system 32 and the objective prism 26 constitute an objective lens system, and the eyepiece lens system 34 and the eyepiece prism 28 constitute an eyepiece optical system.

The objective optical system and the eyepiece optical system are composed of an objective prism 2
The optical system 6 is optically connected to an eyepiece prism 28. The objective optical system and the eyepiece optical system cooperate to constitute an observation optical system for observing a subject.

In the polo type 2 real image type binoculars 10, a space 42 between the objective lens system 32 and the eyepiece prism 28 and a space 44 between the eyepiece lens system 34 and the objective prism 26 are:
No components or the like of the binoculars 10 are arranged at all, which is a so-called useless space.

Subsequently, a polo 2 according to an embodiment of the present invention.
The real type binoculars will be described with reference to FIGS. The polo type 2 real image binoculars 10 according to the present embodiment
The eyepiece lens system 34 and the objective prism 2 shown in FIGS.
A lens barrier 50 is provided in a space 44 between the lenses 6, that is, in a space between the eyepiece 24 and the focus ring 14 in FIG. 1.

The lens barrier 50 includes a barrier member 54 for protecting the eyepiece 24 and a support 52 for movably supporting the barrier member 54. The support portion 52 is fixed to a binocular housing, that is, a housing of the lens barrel 12 and a housing of the eyepiece 24.

The barrier member 54 includes a circular portion 56 for closing the opening of the eyepiece 24, an extending portion 58 extending from the circular portion 56, and a pair of pins 60 provided on both ends of the extending portion 58. And The support portion 52 includes a barrier member 54
And a pair of barrier rails 72 for accommodating the pair of pins 60. The barrier member 54 is movably connected to the support 52 by the pin 60 being accommodated in the barrier rail 72.

The pins 60 accommodated in the barrier rails 72 of the support 52 are slidable and rotatable in the barrier rails 72, so that the barrier member 54 is supported by the support 52.
Can be translated and turned about the pin 60 as a fulcrum.

As shown in FIGS. 2 to 4, the pin 60 is moved to the end of the barrier rail 72 on the side of the eyepiece 24, where the barrier member 54 is turned around the pin 60 as a fulcrum, and the circular portion 56 is moved to the eyepiece. By closing the opening of the lens 24, the lens barrier 50 is closed.

On the back side of the circular portion 56 of the barrier member 54,
A closed position locking member 62 is provided. The closed position locking member 62 has a locking portion 64 protruding outside the circular portion 56 and a slit 66 formed inside the locking portion 64, and the locking portion 64 is radially It has elasticity.

As shown in FIGS. 3 and 4, the eyepiece 24 has a cylindrical housing composed of an inner cylindrical body 82 and an outer cylindrical body 84. As shown in FIG. Cylindrical body 82
Inside the groove 8 for receiving the locking portion 64 of the barrier member 54
6 are formed. The locking portion 64 of the barrier member 54 and the groove 86 of the eyepiece 24 constitute a click mechanism,
This prevents the closed barrier member 54 from being opened carelessly.

The barrier member 54 is pivoted about the pin 60, and the circular portion 56 is opened by exposing the opening of the eyepiece 24. The opened barrier member 54 is shown in FIGS.
As shown in FIG. 7, the pin 60 is moved to the retracted position by moving to the end of the barrier rail 72 on the opposite side of the eyepiece 24.

The support section 52 has a pair of holding sections 74 for holding the barrier member 54 moved to the retracted position.
When the barrier member 54 is retracted, the circular portion 56 is pushed between the pair of holding portions 74. The pair of holding members 74
The pressed circular portion 56 is held to prevent the barrier member 54 from inadvertently closing the eyepiece 24 during use of the binoculars 10.

As can be seen from the above description, the support portion 52 of the lens barrier 50 is provided in the space 44 between the eyepiece lens system 34 and the objective prism 26 (see FIG. 9), in other words, the eyepiece lens 24 and the focus ring 14. When the binoculars 10 are used, the barrier member 54 is located between the eyepiece system 34 and the objective prism 26 (see FIG. 9), in other words, the eyepiece 24 and the focusing ring 14. Is moved to the evacuation position located between them.

Therefore, the lens barrier 50 protects the eyepiece 24 and the barrier member 54 is moved to the retracted position.
Of the eyepiece 24 and the housing of the eyepiece 24 do not protrude significantly. As a result, there is almost no obstruction during use and storage of the binoculars 10, and the appearance of the binoculars 10 is not impaired.

The present invention is not limited to the above-described embodiment, but includes all implementations that do not depart from the gist of the invention. In the above-described embodiment, the lens barrier 50 for protecting the eyepiece 24 has been described.
2 may be provided for protection.

That is, a structure similar to the above-described lens barrier 50 may be provided in a space between the objective lens 22 and the eyepiece prism 28 (see FIG. 8). In actual marketed Polo type 2 real image binoculars, this part is generally
Although it is occupied by a smoothly curved lens barrel housing for design reasons, it is actually hollow inside and no parts are placed, so it is necessary to provide a lens barrier in this space. There is no problem at all.

The support portion described in the present embodiment is a single member for supporting the barrier, but may be formed integrally with an exterior member constituting the external appearance. Therefore, the following can be said about the polo type 2 real image type binoculars in the present embodiment. (1) an objective optical system including an objective lens and an objective prism;
An eyepiece optical system including an eyepiece and an eyepiece prism, and a lens barrier for protecting the eyepiece, wherein the lens barrier includes a barrier member for covering the eyepiece, and a supporter that movably supports the barrier member. In the polo type 2 real image type binoculars, the support portion is located in a space between the eyepiece and the objective prism, and the barrier member is a retracted position located in the space between the eyepiece and the objective prism. Polo type 2 real image type binoculars can be provided. (2) an objective optical system including an objective lens and an objective prism;
An eyepiece optical system including an eyepiece and an eyepiece prism, and a lens barrier for protecting the objective lens, wherein the lens barrier is a barrier member for covering the objective lens, and a supporter that movably supports the barrier member. In the polo type 2 real image type binoculars, the supporting portion is located in a space between the objective lens and the eyepiece prism, and the barrier member is a retracted position located in the space between the objective lens and the eyepiece prism. Polo type 2 real image type binoculars can be provided. (3) an objective optical system including an objective lens and an objective prism;
An eyepiece optical system including an eyepiece and an eyepiece prism, a focus ring for adjusting the diopter of the field of view, and a lens barrier for protecting the eyepiece, the lens barrier comprising:
In a polo type 2 real image type binoculars having a barrier member for covering the eyepiece and a support for movably supporting the barrier, the support is located in a space between the eyepiece and the focus ring. Wherein the barrier member is moved to a retracted position located in a space between the eyepiece and the focus ring, and a polo type 2 real image type binocular is provided.

[0027]

According to the present invention, there is provided a polo type 2 real image type binocular having a lens barrier which does not protrude greatly from the binocular housing. The lens barrier hardly interferes, and the provision of the lens barrier does not impair the appearance of the binoculars.

[Brief description of the drawings]

FIG. 1 is a perspective view of a polo type 2 real image type binocular provided with a lens barrier according to an embodiment of the present invention.

FIG. 2 is a plan view of the polo type 2 real image type binoculars of FIG. 1 viewed from the eyepiece side, in which a barrier member of the lens barrier covers the eyepiece.

FIG. 3 is a cross-sectional view of the lens barrier and the eyepiece taken along line III-III in FIG. 2;

FIG. 4 is a sectional view of the lens barrier and the eyepiece taken along the line IV-IV in FIG. 2;

FIG. 5 is a plan view of the polo type 2 real image type binoculars of FIG. 1 viewed from the eyepiece side with the barrier member of the lens barrier moved to the retracted position.

FIG. 6 is a sectional view of the lens barrier and the eyepiece taken along line VI-VI of FIG. 5;

FIG. 7 is a top view of the lens barrier in which the barrier member has been moved to the retracted position.

FIG. 8 is a perspective view of a generally known Polo type 2 real image type binocular.

9 shows an objective optical system and an eyepiece optical system built in each lens barrel of the polo type 2 real image type binoculars of FIG.

FIG. 10 is a top view of the optical system of the polo type 2 real image type binoculars of FIG. 8;

11 is a side view of the optical system of the polo type 2 real image type binoculars of FIG.

[Explanation of symbols]

 Reference Signs List 10 Polo type 2 real image type binoculars 14 Focus ring 24 Eyepiece 50 Lens barrier 52 Support 54 Barrier member 60 Pin 60 72 Barrier rail 72 74 Holder

Claims (3)

[Claims] A first optical system including a first lens and a first prism; a second optical system including a second lens and a second prism; and a first optical system for protecting the first lens. A polo 2 type real image binocular having a lens barrier, the lens barrier having a barrier member for covering the first lens, and a support for movably supporting the barrier member; Is located in the space between the first lens and the second prism, and the barrier member is moved to a retracted position located in the space between the first lens and the second prism. Binoculars. 2. The first optical system is an eyepiece optical system. Therefore, the first lens is an eyepiece lens, the first prism is an eyepiece prism, and the second optical system is an objective optical system. ,
Therefore, the Porro type 2 real image type binoculars according to claim 1, wherein the second lens is an objective lens and the second prism is an objective prism. 3. The first optical system is an objective optical system, so that the first lens is an objective lens, the first prism is an objective prism, and the second optical system is an eyepiece optical system. ,
Therefore, the polo type 2 real image binoculars according to claim 1, wherein the second lens is an eyepiece and the second prism is an eyepiece.