JPH10227968A - Optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily attach and detach a lens member by providing a sealed ventilation state switching means such as a ball plunger which switches the sealed state and ventilation state of the space between a lens member and a fitting means in response to the attaching/detaching operation of the lens member for the optical device such as binoculars having detachable lens members such as oculars. SOLUTION: A ventilation hole 12 is formed in a holder 10 for a spigot mount 4a that fit an ocular to a binoculars main body detachably and the ball plunger 18 is provided which consists of a ball valve 14 capable of opening and closing the ventilation hole 12. While the ocular is fitted, the ball valve 14 closes the ventilation hole 12 with the energizing force of a spring 15, so the space in the spigot mount 4a is sealed. To detach the ocular, a mount ring 11 is rotated and the ball valve 14 is pressed with its projection part 11c to linking the space in the spigot mount 4a to the outside air, thereby removing the sealed state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device such as a monocular or binocular having a replaceable lens member such as an eyepiece, and more particularly, to a lens member and an attaching means for attaching the lens member to an apparatus body. The present invention relates to an optical device that can easily seal and vent the space between the optical device and the optical device.

[0002]

2. Description of the Related Art For example, binoculars are known in which a normal daytime eyepiece and a nighttime eyepiece incorporating an image intensifier are interchangeable. In such binoculars, an attachment means such as a spigot mount is provided, and the eyepiece is attached to and detached from the body of the binoculars by rotating a mount ring. Further, not only the eyepieces for day and night as described above, but also binoculars in which eyepieces having different magnifications can be exchanged are known. Even in such binoculars,
By mounting means such as the spigot mount described above,
The eyepiece is attached to the binocular body.

Since such binoculars are used outdoors, it is necessary to seal the space formed between the eyepiece and the mounting means so that rain, splashes and the like do not enter the space. For this reason, packing is provided at a portion where the mounting means and the eyepiece are in contact, and the eyepiece is attached to the binocular body so as to crush the packing,
This space is sealed.

[0004]

However, if the space between the eyepiece and the mounting means is sealed as described above, it becomes difficult for outside air to enter this space, so that the eyepiece must be removed when the eyepiece is replaced. It becomes difficult. Also, when the eyepiece is attached, the air in this space is hardly released to the outside, so that the attaching operation is difficult.

The present invention has been made in view of such circumstances, and in an optical device in which a lens member such as an eyepiece can be attached and detached, such as the above-mentioned binoculars, the attaching and detaching operation of the lens member can be easily performed. It is an object to provide an optical device.

[0006]

An optical device according to the present invention is an optical device comprising: an optical system main body; and mounting means provided on the optical system main body and for detachably attaching a lens member to the optical system main body. A closed air-permeable state switching means for bringing the space into a closed state based on the mounting operation of the lens member, and ventilating the space with the outside based on the removing operation of the lens member. It is.

It is preferable that the mounting means be a spigot mount for attaching and detaching the lens member to and from the optical system main body based on a rotation operation of a mount ring. Further, the sealed ventilation state switching means seals the space based on the mounting operation of the lens member by rotation of the mount ring, and externalizes the space based on the removal operation of the lens member by rotation of the mount ring. It is preferably a means for ventilating.

Further, the closed ventilation state switching means closes the ventilation hole based on a mounting operation of the lens member by rotation of the mount ring, and removes the lens member. It is preferable to comprise a ball plunger that opens the ventilation hole based on the operation.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 is a perspective view showing a configuration of binoculars as an embodiment of the optical device according to the present invention, and FIG.
FIG. 6 is a partially enlarged arrow view in the direction A of FIG.
FIG. 7 is a side view showing a configuration of an eyepiece for daytime, and FIG. 8 is a side view showing a configuration of an eyepiece for nighttime.

As shown, the binoculars of the present embodiment include a pair of objective lenses 1a and 1b, a pair of eyepieces 2a and 2b for daytime, and a binocular body 3. The binocular body 3 is provided with spigot mounts 4a and 4b for detachably attaching the eyepieces 2a and 2b to the binocular body 3. And this spigot mount 4a,
4b, the eyepieces 2a, 2b for daytime shown in FIG.
And the eyepieces 2a 'and 2b' for night use shown in FIG. The night eyepieces 2a 'and 2b' include an image intensifier tube therein so that the subject can be observed with a small amount of light.

In the vicinity of the spigot mounts 4a and 4b, a vibration isolating means such as a gyro motor for preventing deterioration of an optical image due to vibration or swing transmitted to the binoculars during observation with the binoculars and an image intensifier are driven. A main switch 5 for setting and a lock lever 6 for controlling the driving of the vibration isolating means are provided. Further, a battery for driving the image stabilizing means and the image intensifier is provided inside the binocular main body 3.

As shown in FIGS. 7 and 8, diopter rings 7a, 7b, 7a ', 7b' are attached to the eyepieces 2a, 2b, 2a ', 2b' so as to be rotatable around their optical axes. As a result, the eyepieces 2a, 2b, 2 are adjusted so that the focal length is suitable for the observer.
The focal lengths a 'and 2b' can be adjusted.

Next, the structure of the spigot mounts 4a and 4b will be described. Figure 1 shows a spigot mount 4
FIGS. 2A and 2B are diagrams showing a detailed configuration of a spigot mount, and FIG.
FIG. 3 is an enlarged partial cross-sectional view showing a detailed configuration of a vent hole described later. Since the spigot mounts 4a and 4b have the same configuration, only the spigot mount 4a will be described here.

As shown, the spigot mount 4
a has a holder 10 in which the eyepiece 2a is inserted, and a mount ring 11 provided around the holder 10 so as to be rotatable around the optical axis. The holder 10 is fixed to the eyepiece frame section 20 of the binocular main body 3. When the eyepiece 2 a is attached to the spigot mount 4 a on a part of the outer peripheral surface thereof, the holder 10 is fixed by the eyepiece 2 a, the holder 10 and the eyepiece frame section 20. A ventilation hole 12 for communicating the space 21 formed with the outside is formed. A packing 17 for sealing the space 21 when the eyepiece 2a is attached is attached to the inner peripheral surface of the holder 10.

On the outer peripheral surface of the mount ring 11, corrugated portions 11a and 11b for preventing slipping of a finger when rotating the mount ring 11 are provided.
Are formed symmetrically with respect to the optical axis, and on the inner peripheral surface in the vicinity of the corrugated portion 11a, a protruding portion 11c protruding toward the rotation center of the mount ring 11 and also protruding toward the holder 10 is formed. The mount ring 11 is shown in FIG.
As shown in (b), the rotation angle is approximately 40 degrees.

The vent hole 12 has a valve portion 13 formed in an opening on the outer peripheral side of the holder 10, and a ball valve 14 is inserted therein. Ball valve 14 is spring 1
5 urges the holder 10 radially outward. The ball valve 14 is in contact with the valve section 13 by the urging force of the spring 15. The ball plunger 18 is formed by the valve portion 13, the ball valve 14 and the spring 15.
It constitutes.

Next, the operation of this embodiment will be described. In the present embodiment, a case will be described in which the eyepiece 2a for daytime is attached to the spigot mount 4a.

The eyepiece 2a is attached to the spigot mount 4a.
When attaching the mounting ring, the mounting ring 11 is attached as shown in FIG.
Rotate to the position shown in. In this state, the convex portion 11c of the mount ring 11 contacts the ball valve 14 and pushes the ball valve 14 into the vent hole 12. Then, attach the eyepiece 2a to the spigot mount 4a.
The eyepiece 2a is pushed into the spigot mount 4a until the end of the eyepiece abuts on the bottom of the holder 10. At this time, the air existing in the space 21 formed by the eyepiece 2 a, the holder 10, and the eyepiece frame 20 is discharged to the outside through the ventilation hole 12.

After that, the mount ring 11 is moved to the position shown in FIG.
When the ball valve 14 rotates to the position shown in FIG. 7, the pressing of the ball valve 14 in the ventilation hole 12 by the convex portion 11c is released, and the ball valve 14 comes into contact with the valve portion 13 by the urging force of the spring 15. The packing 1 attached to the holder 10 by the eyepiece 2a
7 is slightly crushed, and the ball valve 14
Is in contact with the valve portion 13, so that the space 2
1 will be sealed. Therefore, even if the binoculars are used outdoors, rain or the like is prevented from entering the space 21.

Conversely, when removing the eyepiece 2a from the spigot mount 4a and replacing it with the eyepiece 2a 'for night use, the mount ring 11 in the state shown in FIG. Rotate to the position shown in. As a result, the convex portion 11c of the mount ring 11 is
4, the ball valve 14 is pushed into the air hole 12, and the outside air enters the space 21 through the air hole 12. Therefore, since the space 21 has the same pressure as the outside air, the eyepiece 2a can be easily removed from the spigot mount 4a. Then, the eyepiece 2a is removed, and the night eyepiece 2a 'is attached to the spigot mount 4a in the same manner as when the eyepiece 2a is attached.

As described above, in the present embodiment, the space 21 can be switched between the sealed state and the state communicating with the outside air by the ball plunger 18 including the valve portion 13, the ball valve 14, and the spring 15. The eyepieces 2a, 2a 'can be easily attached and detached with a simple configuration. Further, a mechanism for sealing the space 21 can be reduced in size,
The original functions of the spigot mounts 4a and 4b are not impaired. Further, since the pressing operation of the ball valve 14 and the releasing operation of the pressing state are performed by the mount ring 11, the sealing operation of the space 21 and the communication operation with the outside air can be easily performed.

In the above-described embodiment, the operation of pressing the ball valve 14 and the operation of releasing the pressed state are performed by the convex portion 11c formed on the mount ring 11.
Alternatively, the ball valves 14 may be manually pressed only by fixing the a and 2b (2a ', 2b').

In the above embodiment, the eyepieces 2a and 2b for daytime and the eyepieces 2a 'and 2 for nighttime are used.
Although the description has been given of a device that exchanges b ′, an optical device according to the present embodiment is also applicable to binoculars that can exchange eyepieces having different magnifications, such as an eyepiece of 12 × and an eyepiece of 16 ×. Can be applied.

In the above embodiment, the optical device of the present invention is applied to binoculars. However, various lens members such as a telephoto lens of a waterproof camera or an eyepiece of a telescope can be exchanged. The present invention can be applied to any optical device that needs to be hermetically sealed.

[0025]

As described in detail above, according to the optical apparatus of the present invention, switching between the sealing operation and the ventilation operation of the space between the lens member and the mounting means is performed based on the attaching / detaching operation of the lens member. Because the provision of a closed ventilation state switching means to perform
By simply performing the operation of attaching the lens member to the mounting means, the space can be sealed, and the space can be ventilated simply by performing the operation of removing the lens member. Therefore, the state of the air pump can be prevented, and the attachment / detachment operation of the lens member can be easily performed. In addition, by using a spigot mount as the mounting means, the space can be sealed and ventilated by the sealed ventilation state switching means based on the rotation of the mount ring. In addition, ventilation can be performed, and the attachment / detachment operation of the lens member can be more easily performed. Further, since the closed ventilation state switching means is formed of a ball plunger, the configuration of the closed ventilation state switching means can be simplified, and the size of the closed ventilation state switching means can be reduced. Therefore, the above space can be sealed and ventilated without impairing the original function of the spigot mount.

[Brief description of the drawings]

FIG. 1 is a diagram showing a detailed configuration of a spigot mount after a binocular according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a detailed configuration of a spigot mount in the binoculars according to the embodiment of the present invention.

FIG. 3 is a sectional view showing a configuration of a ball plunger.

FIG. 4 is a perspective view showing a configuration of binoculars according to the embodiment of the present invention.

FIG. 5 is a view in the direction of arrow A in FIG. 4;

FIG. 6 is a partially enlarged view taken in the direction of arrow B in FIG. 5;

FIG. 7 is a side view showing the configuration of an eyepiece for daytime use;

FIG. 8 is a side view showing a configuration of an eyepiece for night use.

[Explanation of symbols]

 1a, 1b Objective lens 2a, 2b Daytime eyepiece 2a ', 2b' Nighttime eyepiece 3 Binocular body 4a, 4b Spigot mount 5 Main switch 6 Lock lever 10 Holder 11 Mount ring 12 Vent hole 13 Valve section 14 Ball valve 15 Spring 17 Packing 18 Ball plunger 20 Eyepiece frame 21 Space

Claims (4)

[Claims] 1. An optical apparatus comprising: an optical system main body; and mounting means provided on the optical system main body and for detachably attaching a lens member to the optical system main body. An optical device, comprising: a hermetically-sealed state switching means for setting a space between the lens member and the mounting means in a sealed state, and for ventilating the space with the outside based on a removing operation of the lens member. . 2. The optical device according to claim 1, wherein said mounting means comprises a spigot mount for attaching and detaching said lens member to and from said optical system main body based on a rotation operation of a mount ring. 3. The sealed ventilation state switching means seals the space based on the mounting operation of the lens member by rotation of the mount ring, and performs the removal based on the removal operation of the lens member by rotation of the mount ring. 3. The optical device according to claim 2, wherein the device is a means for ventilating the space with the outside. 4. The closed ventilation state switching means, comprising: a ventilation hole for communicating the space with the outside air; and closing the ventilation hole based on a mounting operation of the lens member by rotation of the mount ring, and removing the lens member. 4. The optical device according to claim 3, further comprising a ball plunger that opens the vent hole based on an operation.