JPH10319325A - Binoculars - Google Patents

Abstract

PROBLEM TO BE SOLVED: To possess a compact structure by which optical axis deviation can be prevented, which is strong with respect to impact from an outside, and whose cost is low. SOLUTION: A main body part 1 is constituted of a horizontal part 11 on which four embossings 14 are provided, and a holding surface 13 holding eyepieces 3L and 3R set at right angles with the part 11; the part of the central part of the surface 13 is a projecting part 16, and a focusing screw 17 is held in a rotation holding hole 18. On the other hand, an objective base 19 is constituted of a horizontal part 21 including four sliding parts 20 and a holding surface 4d for holding right and left objective lens barrels 42 and 40 bent at right angles with the part 21, and a female screw 25 fitted into the screw 17 is provided corresponding to the hole 18 on a rear end face 24 bent at right angles with the optical axis 01 of the central part of the base 19. A base substance 10 and the base 19 are relatively moved by the embossings 14, the screw 17, the part 20 and the screw 25, and the base substance 10, the screw 17 and the lens barrels 40 and 42, etc., are concealed by upper and lower covers 50 and 51.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to binoculars having adjustable interpupillary distance for observing an image formed by a pair of left and right objective optical systems with a pair of right and left eyepiece optical systems.

[0002]

[Prior art]

(1) Conventionally, in the binoculars in which the left and right objective optical systems and the eyepiece optical system are integrally rotated or horizontally moved to adjust the interpupillary distance, a configuration in which the left and right objective optical systems do not have a relatively fixed relationship. Are known.

(2) Japanese Patent Application Laid-Open Nos. 7-043645, 7-191285, 8-160
Japanese Patent No. 485 discloses a pair of binoculars in which an eyepiece optical system is held by an exterior component, an objective optical system does not move at the time of adjusting the interpupillary distance, and the eyepiece optical systems rotate in opposite directions.

[0004]

[Problems to be solved by the invention]

(1) However, in the binoculars of the above-described conventional example (1), since the objective optical system and the eyepiece optical system are interlocked for adjusting the interpupillary distance, an external impact is likely to affect the objective optical system, It is necessary to firmly hold the objective optical system. Furthermore, the back and forth visual axes are displaced due to rattling at the connecting portion of the left and right optical systems,
By adding the interpupillary adjustment function to the left and right interlocking mechanism for focus adjustment, the diopter of the left and right is easily deviated, and when adding a camera shake correction function or a distance measurement function from a mechanism that only observes, There is a problem that it is difficult to add a battery.

(2) Further, in the binoculars of the conventional example (2), since the eyepiece optical system is held by exterior parts,
At the time of observation, there is a problem that the deformation of the exterior member directly shifts the visual axis.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an inexpensive and compact binocular which solves the above-mentioned problems, prevents optical axis deviation, and is resistant to external impact.

[0007]

According to the present invention, there is provided a binocular for observing an image formed by a pair of left and right objective optical systems with a pair of right and left eyepiece optical systems. A main body including a holding surface for holding the eyepiece optical system and a sliding portion provided in the optical axis direction; a sliding portion for engaging with the sliding portion of the main body and sliding in the optical axis direction; An objective table having a holding surface set at a right angle to the optical axis of the objective optical system to hold the objective optical system, and a moving mechanism for relatively moving the main body and the objective table in the optical axis direction. ,
It has an exterior member surrounding the main part and the objective stand.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the illustrated embodiment. 1 is a cross-sectional view of the prism binoculars as viewed from above, FIG. 2 is a longitudinal cross-sectional view of the prism binoculars, FIG. 3 is a front view of a left and right interlocking mechanism of the eyepiece optical system, and the optical systems of the prism binoculars are It is composed of a pair of objective lenses 1L, 1R, a pair of left and right Porro II erect prisms 2L, 2R, a pair of right and left eyepieces 3L, 3R, and optical components of vari-angle prisms 4L, 4R in which liquid is sealed.

Each of the objective lenses 1L and 1R has a pair of left and right parallel optical axes O1L and O1R, respectively.
R passes through the centers of the variangle prisms 4L and 4R, respectively, and reaches the entrance surfaces of the pair of right and left erect prisms 2L and 2R, respectively. The pair of right and left erect prisms 2
The optical axes O1L, O1R of the objective lens
A pair of left and right eyepieces 3L, 3
The optical axes 02R and 02R of R are connected.

The base 10 of the binoculars is made of a strong metal plate, and has a horizontal portion 11 parallel to a plane formed by the optical axes O1L and O1R.
The eyepiece units 12L and 12B which are bent at right angles to this.
And a holding surface 13 for holding R. Further, four embosses 14 for sliding purpose are projected from the horizontal portion 11 and sliding surfaces around the optical axes O1L and O1R are respectively provided on the holding surface 13. The moving holes 15L and 15R are provided. In the center of the base 10, the same surface as the holding surface 13 extends upward to form a projection 16 and a rotation holding hole 18 for rotatably holding the focus screw 17 at a fixed position is formed in the projection 16. Perforated.

The objective table 19 is also made of a durable metal plate, and includes a horizontal portion 21 including four sliding portions 20 which slide in correspondence with the four embosses 14 of the base 10, and an optical axis O1L,
The holding surfaces 23L, 23R are bent at a right angle to O1R and have holes 22L, 22R centered on the optical axes O1L, O1R. The rear end face 24 of the central portion bent at a right angle to the horizontal portion 21 has a protruding portion 16 of the base 10.
A female screw 25 screwed with the focus screw 17 is provided corresponding to the rotation holding hole 18. A hole 22R centered on the optical axis O1R and a hole 22L centered on the optical axis O1L
And a slightly different shape.

An optical axis O1L,
Guide holes 26 and 27 provided in the O1R direction and guide escape holes 28 and 29 having a slightly larger width are provided.
Four guide members 30 of the same shape, which are fitted into the guide holes 26 and 27 and are slightly set in the guide escape holes 28 and 29, and the horizontal portion 21 of the objective table 19. The four guide springs 31 acting around the guide holes 26 and 27 and the guide escape holes 28 and 29 to press the plate 10 against the horizontal portion 11 of the base 10 are co-tightened to the horizontal portion 11 of the base 10 by screws. ing.

Thus, the objective table 19 is provided with the guide hole 2
The two guide members 30 fitted to 6 and 27 are movably guided in the optical axis direction with the base 10 as a reference, and the sliding portions 20 are held in close contact by four guide springs 31.

The focus screw 17 is rotatably held in the rotation holding hole 18 of the projection 16 of the base 10, and a focus knob 32 is screwed at the rear end thereof to prevent the focus screw 32 from coming off in the optical axis direction. I have. This focus screw 17
Is rotated at a fixed position with respect to the base 10, and the screw portion is screwed with the female screw 25 on the rear end face 24 of the central portion bent at right angles to the horizontal portion 21 of the objective table 19, so that the focus knob 32 Is rotated, the entire objective table 19 can be moved while being pressed against the base 10 in the optical axis direction.

The pair of left and right eyepiece units 12L and 12R are formed symmetrically with each other. Inside the eyepiece units 3L and 3R, the entrance surfaces corresponding to the optical axes O1L and O1R and the eyepiece lenses 3L and 3R are provided. Erect prisms 2L, 2R of a Porro II type having emission surfaces corresponding to the optical axes 02L, 02R are held, and a pair of eye contact rubbers 33L, 3R are provided at the rear end.
3R is attached. Eyepiece units 12L, 12
The front end surface of R is provided with flange portions 34L and 34R so as to slightly protrude from the holding surface 13 bent at a right angle to the horizontal portion 11 of the base 10, and each of the optical axes O1L and O1R is centered. Sliding holes 15L and 15R.

Also, eyepiece units 12L, 12R
As shown in FIG. 3, a pair of left and right interlocking plates 35L and 35R having a substantially symmetric shape are attached to the
L and 35R mesh with each other at inner gear portions 36L and 36R. And four screws 37L and 37R respectively
In this case, screws are screwed to flange portions 34L, 34R on the front end surfaces of the pair of left and right eyepiece units 12L, 12R, and the outer peripheral portions 38L, 38R of the screwed portions are extended in the circumferential direction, and further, the holding of the base 10 When the screw is fixed to the surface 13, the optical axis 01 is appropriately set so as to be charged.
It is bent in the L and 01R directions.

The left objective lens barrel 40 holds the left objective lens 1L near the rear end thereof, and is bent at a right angle to the optical axis O1L of the objective table 19 at the flange portion 41 to form a hole 22L centered on the optical axis O1L. Is screwed to the holding surface 23L having

The right objective lens barrel 42 holds the right objective lens 1R near the rear end, and is provided with a fitting part 43 at a position equally divided in the circumferential direction around the lens barrel 42 near the middle part. Three partial screw portions 44 are provided in the vicinity of the gap between the three fitting portions 43.

The hole 22 in the holding surface 23R of the objective table 19
R represents three fitting portions 43 equally provided around the lens barrel 42.
There are three partial fitting portions 45 for fitting to the right objective lens barrel 42 by this. Furthermore,
In order to correspond to the three partial screw portions 44, a partial screw receiving portion 46 is provided at a position that divides the circumference of the optical axis O1R into three equal parts.
In order to clamp the three partial screw portions 44 against the screw receiving portion 46 from the front, the three spring portions 47 are provided.
Is provided. Thus, the right objective lens barrel 42 can be moved in the direction of the optical axis O1R by rotating, and the pressing spring 48 having three spring portions 47 is held by the holding surface 23R of the objective table 19 by screws (not shown). It is fixed to.

An upper cover 50 and a lower cover 51 shown in FIG.
Is configured so that substantially the entire surface meshes with a plane including the optical axes O1L and O1R. The upper cover 50 is the base 1
0, covers the focus screw 17, the objective table 19, the left and right objective lens barrels 40 and 42, and 3
The base 10 is screwed to the positioning portion via mounting holes 52, 53, 54.

The lower cover 51 is connected to the objective lens barrels 40 and 42.
Except for the rotation, around the eyepiece units 12L and 12R, and around the focus screw 17, it is engaged with the upper cover 50 over the entire circumference, and is screwed to the upper cover 50 at two places of the mounting holes 55L and 55R. Further, the cylindrically extending distal end portions 56L, 56R of the lower cover 51 and the cylindrically extending distal end portions 57L, 57R of the upper cover 50 are engaged to form a cylindrical portion at the same time, and the cylindrical portion has a sectional shape. Are fitted into the U-shaped ring-shaped objective covers 58L and 58R, and are fixed by bonding or the like.

Further, dustproof sheets 59L and 59R are fitted so as to engage with the outer peripheral grooves at the outer peripheral portions of the distal ends of the objective lens barrels 40 and 42, and the outer diameters of the dustproof sheets 59L and 59R and the inner diameters of the objective covers 58L and 58R. Are fitted, and objective rubbers 60L, 60R are attached to the distal ends thereof so as to further cover the objective covers 58L, 58R.

On the back side of the objective lenses 1L and 1R,
A known anti-vibration unit 61 including the vari-angle prisms 4L and 4R is arranged, and an attached electric circuit board 62 is attached to the anti-vibration unit 61. Further, two batteries 63 are arranged between the objective lens barrels 40 and 42, and two electrodes 64 having spring properties are arranged on the inner surface of the upper cover 50 in correspondence with these batteries 63. The electrode 64 is connected to an electric circuit (not shown) by a lead wire. The battery 63 is held in the binoculars while being held between the two electrodes 64 and the common electrode 66 fixed to the lid 65 attached to the lower cover 51 so as to operate in the housed state.

With the above configuration, the pair of left and right eyepiece units 12L and 12R rotate in opposite directions to each other while being in close contact with the holding surface 13 bent at right angles to the horizontal portion 11 of the base 10. And eyepiece 3L,
It is possible to change the interval between the optical axes O2L and O2R of the 3R.

Also, by rotating the right objective lens barrel 42 appropriately, the position of the right objective lens 1R on the optical axis O1R is shifted with respect to the left objective lens 1L held by the left objective lens barrel 40.
Since it can be moved slightly, it is possible to realize a mechanism for finely adjusting the diopter difference between left and right at the time of observation.

Further, by fitting the dustproof sheets 59L, 59R and the objective covers 58L, 58R, the gap between the inner surfaces of the objective covers 58L, 58R and the objective lens barrels 40, 42 can be substantially sealed. Objective cover 58L,
By attaching the objective rubbers 60L and 60R covering the 58R, dust and water droplets hardly enter the inside of the binoculars covered by the upper and lower covers 50 and 51. Further, even when an impact is applied from outside the binoculars, first, the objective rubbers 60L, 60R
Since the upper and lower covers 50 and 51 absorb a certain amount of impact, it is possible to safely protect the body parts of the binoculars and the parts with additional functions stored in the empty space behind the objective lenses 1L and 1R.

For the image stabilizing unit 61, for example, a shake detecting means for detecting a shake amount of the optical equipment, and the objective lenses 1L, 1R based on an output signal from the shake detecting means.
Japanese Patent Application Laid-Open No. 6-43365 discloses a unit incorporating drive control means for driving a variable apex angle prism in which a liquid is sealed so as to suppress a shake of an object image formed by the apparatus.

Further, a correction optical system in which two deflection prisms for transmitting and deflecting the light beam of the objective lens are arranged in the thickness direction, and the two deflection prisms are equiangularly opposite to each other about their common axis. Japanese Patent Application Laid-Open No. H6-250099 discloses a unit that incorporates a deflector prism rotation drive unit that rotates only by an angle and a shake detection unit and a drive control unit.

Further, the lens system disclosed in Japanese Patent Application Laid-Open No. 8-248463 can be replaced with an anti-vibration unit 61 using a correction optical system that shifts in the direction perpendicular to the optical axis. A distance measuring mechanism for measuring the distance of the object can be mounted.

Further, the electric circuit board 62 attached to the vibration isolating unit 61 does not need to be particularly limited to an electric circuit for the vibration isolating unit 61, and in the present embodiment, it is possible to prevent an external impact or foreign matter from entering. Because of the structure, it is possible to mount a weak electric circuit on them, and it is possible to use all electric circuits including a radio or a flashlight, for example.

[0031]

As described above, the binoculars according to the present invention hold the left and right eyepieces on one holding surface provided on the main body, and the left and right objective lenses on one holding surface provided on the objective table. , The deviation of the left and right optical axes can be easily prevented, maintenance is not required for a long time, and since the main body, objective table and objective lens are protected by exterior parts, The structure becomes strong with respect to the impact of
Since it is suitable for outdoor use and can secure a space for providing an electric circuit in the main body, it is easy to incorporate additional functions for correcting camera shake and measuring a distance, and a compact structure can be achieved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a prism binocular as viewed from above.

FIG. 2 is a sectional view seen from a side.

FIG. 3 is a front view of an interlocking mechanism of the eyepiece unit.

[Explanation of symbols]

 1L, 1R Objective lens 3L, 3R eyepiece 10 Base 12L, 12R Eyepiece unit 17 Focus screw 19 Objective base 35L, 35R Interlocking plate 40, 42 Objective lens barrel 50 Upper cover 51 Lower cover 61 Vibration isolation unit 62 Electric circuit board 63 Battery

Claims (7)

[Claims] 1. A pair of binoculars for observing an image formed by a pair of left and right objective optical systems with a pair of left and right eyepiece optical systems, and a holding portion for holding the pair of left and right eyepiece optical systems and a sliding portion provided in an optical axis direction. A main body comprising: a main body having: a main body; a sliding part for engaging the main body with a sliding part and sliding in the optical axis direction; and a right angle to the optical axis of the objective optical system for holding the objective optical system. An objective table having a holding surface set to a, a moving mechanism for relatively moving the main body and the objective table in the optical axis direction, and an exterior member surrounding the main body and the objective table. Binoculars. 2. The binoculars according to claim 1, wherein at least one of the lenses constituting the objective optical system can be slightly moved in an optical axis direction with respect to the objective table. 3. The binoculars according to claim 1, wherein the eyepiece optical system is rotatable in opposite directions about an optical axis on a holding surface that holds the eyepiece optical system. 4. The binoculars according to claim 1, wherein an electric circuit is disposed between the objective optical system and an optical axis direction of the eyepiece optical system. 5. The binoculars according to claim 1, wherein an anti-vibration mechanism is provided between the objective optical system and the eyepiece optical system in a direction of an optical axis to correct shake during image observation. 6. The binoculars according to claim 1, wherein a distance measuring mechanism for measuring a distance to an observation target is provided between the objective optical system and the optical axis direction of the eyepiece optical system. 7. The binoculars according to claim 4, wherein a battery is disposed between the optical axes of the objective optical system.