JPH10115766A - Binoculars - Google Patents

Abstract

PROBLEM TO BE SOLVED: To move an ocular in small space by constituting an ocular system and an erect optical system so that they can integrally move in the optical axis direction of the ocular lens system. SOLUTION: A prism holder 63 holding an auxiliary prism 12L and a roof prism 13L and a lens holder 65 holding the 2nd lens 14L of an objective lens system and the ocular 15L are attached to a moving body 61. A decorative ring 67 is attached to the edge of the ocular 15L. Thus, the moving body 61 is supported to move in the optical axis direction with respect to a movable frame 31. By such constitution, space provided only to allow the movement of the ocular system need not be provided between the erect optical system and the ocular system, so that the erect optical system and the ocular system are proximately arranged by as much as the eliminated space, and the ocular is moved in the small space.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to binoculars.

[0002]

2. Description of the Related Art Conventionally, binoculars that adjust a focus by moving an eyepiece system have been known.

[0003]

However, in the binoculars of the type in which the eyepiece system is moved, the movement of the eyepiece system is allowed between the prism group, which is an erecting optical system, and the eyepiece system. In this case, it is necessary to provide only such an interval, and this space hinders downsizing of the binoculars.

In view of the above circumstances, an object of the present invention is to provide binoculars that can move an eyepiece in a small space.

[0005]

In order to achieve the above-mentioned object, the binoculars of the present invention are constructed such that, in each of the left and right telephoto optical systems,
The eyepiece system and the erecting optical system are configured to be integrally movable in the optical axis direction of the eyepiece system.
With this configuration, there is no need to provide an interval between the erecting optical system and the eyepiece lens system that allows the movement of the eyepiece lens system. The binoculars can be arranged close to each other, so that the size of the binoculars can be reduced.

Further, the above-mentioned eyepiece lens system and the erecting optical system can be held by a pair of left and right moving bodies provided so as to be movable in the optical axis direction of the eyepiece lens system. With this configuration, it is possible to hold the eyepiece lens system and the erecting optical system so as to be integrally movable with a simple configuration.

Further, the moving body can be configured so that the eyepiece system can move so as to approach the front lens of the objective lens system until the telephoto optical system becomes unobservable. With such a configuration, when the binoculars are not used, the eyepiece lens system can be brought closer to the front lens of the objective lens system until the observation becomes impossible, thereby reducing the overall size of the binoculars.

[0008] Further, it may be so arranged that the focus is adjusted by the movement of the moving body. That is, in the moving area of the moving body, the eyepiece moves between the position where the telephoto optical system becomes unobservable and the position where the telescopic optical system becomes observable in the first area, and focus adjustment in the second area. Can be configured to perform the following. According to this structure, the storage of the eyepiece and the like when not in use and the focus adjustment can be performed by one drive system, and the structure is simplified.

Further, the moving body may be configured to further hold an eyepiece member for covering an observer's eye or a field frame member for defining a field of view of a telephoto optical system. With this configuration, it is possible to dispose the eyepiece member and the field frame member closer to the eyepiece system or the like.

[0010]

Embodiments of the present invention will be described below. The binoculars of the present embodiment are configured to adjust the interpupillary distance by moving the left and right telephoto optical systems symmetrically with respect to the center in the width direction of the binoculars, regardless of the distance between the two eyepieces. Instead, the focus adjustment operation member is configured to be located at the center in the width direction of the binoculars. The details will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the binoculars 1 of the present embodiment. The binoculars 1 include a pair of left and right mirrors (casings) 21 that can move symmetrically with respect to the center in the width direction of the binoculars.
22 and a support frame 25 for supporting both mirror bodies are provided.

FIG. 2 is a diagram showing an optical system of the binoculars 1. The binoculars 1 are so-called roof prism type binoculars in which an eyepiece and an objective lens are arranged on the same straight line. As shown in FIG. 2, left and right mirrors 21 and 22 of the binoculars 1
2 houses a pair of left and right telephoto optical systems 10L and 10R. Each of the telephoto optical systems 10L and 10R is provided with a first lens 1 along the incident optical axes OAL and OAR indicated by alternate long and short dash lines in the drawing.
1L, 11R, auxiliary prisms 12L, 12R, roof prisms 13L, 13R, and second lenses 14L, 14R,
It consists of eyepieces 15L and 15R.

The first lenses 11L and 11R and the second lenses 14L and 14R form an objective lens system, respectively.
The field frame 1 is located at a position where an image is formed by the objective lens system.
6L and 16R are provided. The image formed by the objective lens system is enlarged and observed by the eyepieces 15L and 15R.

Next, a pair of right and left mirror bodies 21 and 2 shown in FIG.
2 will be described in order to be able to move symmetrically with respect to the center in the width direction of the binoculars. In the following description, the objective side of the binoculars is referred to as the front, and the eyepiece side is referred to as the rear.

FIG. 3 is an exploded perspective view showing the frame structure of the binoculars 1. The support frame 25 (FIG. 1) for movably supporting the pair of left and right mirror bodies 21 and 22 includes a bottom plate 41 and a top plate 42, which are two parallel plate members, and a bottom plate 41.
A horizontal H-shaped frame is formed by a central support 45 provided between the camera and the top plate 42 and serving as a column in the height direction of the binoculars.

Left and right telephoto optical systems 10L, 10R (FIG. 2)
Each lens and prism (in FIG. 3, the optical axes OAL and O
AR) is a pair of left and right movable frames 3 provided between the bottom plate 41 and the top plate 42 so as to be movable in the binocular width direction.
1, 32 are supported. In addition, the movable frame 31,
A pair of left and right exterior cases 51 and 52, which are parts to be grasped by an observer, are fixed to 32. The left and right movable frames 31 and 32 and the outer cases 51 and 52 are
1 and 22 (FIG. 1).

FIG. 4 shows the left and right movable frames 31, 32,
FIG. 4 is a perspective view showing a bottom plate 41 that supports both movable frames. The movable frames 31 and 32 are provided with optical system holders 310 and 320 that hold the respective lenses and prisms of the telephoto optical systems 10L and 10R (FIG. 2).

The ends of the holding portions 310 and 320, which correspond to the left and right ends of the binoculars, are bent vertically upward to form side walls 311 and 321. The holding unit 31
In the central area of 0,320, substantially rectangular openings 312,32
2 are formed.

At a front end and a rear end of the holding portion 310 of the movable frame 31, a pair of upright portions 313 and 314 which stand vertically upward at a predetermined distance from the side wall portion 311 are formed. The left telephoto optical system 10L (FIG. 2) is held between the side wall portion 311 and the upright portions 313 and 314.
Similarly, upright portions 323 and 324 are formed at the front end and the rear end of the holding portion 320 of the movable frame 32, and the side wall portion 321 is formed.
And the telephoto optical system 1 on the right side between the upright portions 323 and 324.
OR (FIG. 2) is maintained.

A guide shaft 315 parallel to the side wall 311 is bridged between the upright portions 313 and 314 of the holding portion 310 of the movable frame 31.
A guide shaft 325 parallel to the side wall 321 extends between the two upright portions 323 and 324. Both guide shafts 31
Reference numerals 5 and 325 provide guidance for moving the eyepiece system and the prism in the optical axis direction (details will be described later).

A guide groove 310 extending in the width direction of the binoculars is provided near the front end and the rear end of the holding portion 310 of the movable frame 31.
a, 310b are formed respectively. Similarly, guide grooves 320a and 320b extending in the binoculars width direction are formed near the front end and the rear end of the optical system holding portion 320 of the movable frame 32, respectively.

At the four corners of the bottom plate 41, pins 413, 41
4,415,416 are implanted, and each movable frame 31
And the guide grooves 320a, 320b of the movable frame 32. Guide grooves 310a, 3
10b, 320a, 320b and pins 413, 414, 4
15 and 416, the movable frames 31, 32
Is restricted on the bottom plate 41 so as to be movable only in the width direction of the binoculars.

From the holding portion 310 of the movable frame 31,
A pair of parallel extending portions 331 and 332 extend toward the holding portion 320 of the movable frame 32, and the movable frame 32
From the holding portion 320 of the movable frame 31
A pair of extending portions 341 and 342 extend toward zero.

The extending portions 331 and 332 are formed with engaging grooves 333 and 334 extending in the width direction of the binoculars. Similarly, the extending portions 341 and 342 are formed with engaging grooves 343 and 344, respectively. .

In the center of the bottom plate 41 in the width direction of the binoculars,
A pin 411 that engages with the engaging groove 333 of the movable frame 31 and the engaging groove 343 of the movable frame 32;
A pin 412 that engages with the first engaging groove 334 and the engaging groove 344 of the movable frame 32 is implanted.

FIG. 5 shows that the movable frames 31 and 32 are connected to the bottom plate 4.
1 shows a state where it is attached. When the movable frames 31 and 32 are attached to the bottom plate 41, the extension portions 3 of the movable frame 31
31, 332 and extending portions 341, 34 of the movable frame 32
2 are arranged so as to overlap with each other such that the movable frame 32 side faces upward.

The center support 45 is disposed at the center in the width direction of the bottom plate 41 so as to straddle the respective extending portions of the movable frames 31 and 32. An extension 331 on the objective side of the movable frame 31 and an extension 342 on the eyepiece side of the movable frame 32
Are formed with racks 335 and 345 facing each other.
5 is engaged with a pinion 36 provided at a lower portion.

Further, as shown in FIG.
1 upper end surfaces 313a, 314 of the upright portions 313, 314
a and the upper end surfaces 323 a and 324 a of the upright portions 323 and 324 of the movable frame 32 are contact surfaces that contact the lower surface of the top plate 42. Thus, the movable frame 31,
The position of 32 is regulated by the bottom plate 41 and the top plate 42 in the vertical direction. Thus, the movable frames 31 and 32 are
The binoculars are slidably supported in the width direction by a horizontal H-shaped support frame 25 including the top plate 1, a top plate 42, and a central support 45.

FIG. 6 shows the movable frame 3 on the bottom plate 41.
It is a top view which shows the sliding state of 1 and 32. Each of the movable frames 31 and 32 is provided with a pin 41 implanted on the bottom plate 41.
3,414,415,416 and guide grooves 310a, 31
By engagement with 0b, 320a, 320b, it is possible to slide only in the binoculars width direction. Further, the pinion 36 is connected to the racks 335, 34 of the movable frames 31, 32.
6A and 6B, the movable frames 31 and 32 can move by the same amount in the opposite directions to each other, as shown in FIGS.

As described above, the left and right movable frames 31, 3
The left and right mirror bodies 21 and 22 (FIG. 1) are configured by attaching the outer cases 51 and 52 (FIG. 3) to 2 respectively.
FIG. 7 is a perspective view showing an attachment structure between the right movable frame 32 and the outer case 52. In FIG. 7, the bottom plate 41 and the top plate 42 (FIG. 3) located above and below the movable frame 32 are omitted.

The outer case 52 is formed in a box shape which is open toward the inside in the width direction of the binoculars. A vertical wall 521 is formed at the front end of the outer case 52, and an opening 522 for guiding incident light to the first lens 11R (FIG. 2) of the objective lens system is formed. On the other hand, the rear end of the outer case 52 is entirely open, and an outer edge 52 for attaching the rear end cover 529 is provided around the opening inside the binoculars in the width direction.
3 are formed.

A pair of upright portions 323, 323 of the movable frame 32
Of the 324, the front upright portion 323 is formed with a contact portion 346 that protrudes horizontally forward and contacts the wall 521 of the outer case 52. In addition, the upright part 3 on the eyepiece side
Reference numeral 24 is bent toward the eyepiece side, and upper and lower ends of the bent portion are abutting portions 347 that abut against the outer edge portion 523 of the exterior case 52 on the eyepiece side.

Further, a screw hole 348 is formed in the upright portion 323, and a through hole 524 is formed in a predetermined position of the exterior case 52 corresponding to the screw hole 348. Further, a screw hole 324a is formed in the upright portion 324, and the outer case 5
A through-hole 526 is formed at a position corresponding to the screw hole 324a in the rear end cover 529 that is fitted into the outer edge portion 523 of the second. A screw hole 349 is formed at a predetermined position of the side wall portion 321, and a through hole 525 is formed at a predetermined position of the exterior case 52 corresponding to the screw hole 347.

As described above, the movable frame 32 and the outer case 52 are in contact with the contact portions 346 and 347, the wall 521 and the outer edge 523, and the screw holes 348, 324a, and 34.
Secured by tightening the screw to 9. That is, since the bottom plate 41 and the top plate 42 are located above and below the movable frame 32, the movable frame 32 and the outer case 5 are located at locations other than the top and bottom of the movable frame 32, that is, at the front and rear ends and side ends.
2 is fixed. Note that the left mirror body 21 and the movable frame 31 are fixed in the same manner.

With this configuration, the left and right mirrors 21 and 22 are supported by the horizontal H-shaped support frame 25, and as shown in schematic sectional views in FIGS. 8 (a) and 8 (b).
It slides symmetrically with respect to the support frame 25.

In the binoculars of this embodiment, the movable frame 3
Since the left and right mirror bodies (casings) 21 and 22 composed of the outer case 1 and the outer case 51 and the outer case 52 form a box (shell), a highly rigid structure can be obtained. In order to further increase the rigidity of the left and right mirrors 21 and 22, the movable frame 3
The outer case 1 and the outer case 51 are made of metal.

Since the left and right mirrors 21 and 22 are supported by the horizontal H-shaped support frame 25 including the bottom plate 41, the top plate 42 and the center support 45, as shown in FIG. , Even when the distance between the left and right mirrors 21 and 22 is widened,
The rigidity of the entire binoculars 1 is maintained. In order to further increase the rigidity of the entire binoculars 1, the bottom plate 41 and the top plate 42 are made of metal.

Next, a configuration for accommodating the eyepiece will be described. In the binoculars of the present embodiment, the portions from the auxiliary prisms 12L, 12R to the eyepieces 15L, 15R in the left and right telephoto optical systems shown in FIG. Thus, the eyepiece is stored and the focus is adjusted.

For this purpose, the movable frames 31 and 32 (FIG. 3) are provided with a pair of left and right moving bodies which hold each prism and lens and move along the optical axis. FIG. 9 shows a left moving body 61 attached to the left movable frame 31.
FIG. The right moving body 62 is symmetrical to the left moving body 61 with respect to the center in the binoculars width direction.

As shown in FIG. 9, the movable body 61 is provided with a prism holder 63 for holding the auxiliary prism 12L and the roof prism 13L, and a lens holder 65 for holding the second lens 14L and the eyepiece 15L of the objective lens system. . Also, a makeup ring 67 is provided at the tip of the eyepiece 15.
Is attached. At the tip of the lens holder 65 on the observer side, a target rubber 65a is provided.

The movable frame 31 is provided at the right end of the moving body 61.
Are formed with insertion holes 611 and 612 for inserting the guide shaft 315 extending in the optical axis direction provided in the optical disk. In addition, a projection 613 that contacts the side wall 311 of the movable frame 31 from above is provided at the left end of the moving body 61.
Thus, the movable body 61 is supported by the movable frame 31 so as to be movable in the optical axis direction.

Further, an arm 614 extending to the right is formed at the right end of the moving body 61.
An engagement groove 615 extending in the width direction of the binoculars is formed.

FIG. 10 is a perspective view showing an operation unit 70 for driving the moving bodies 61 and 62. As shown in FIG. 10, an operation wheel 71 is provided inside the center support 45 so as to be rotatable around a support shaft 72. A screw 73 is engaged with the rolling wheel 71, and a screw 7 is attached to a tip of the screw 73.
Slider 7 for guiding only in the front-rear direction so that 3 does not rotate
4 is fixed.

The slider 74 has a corner portion 7 guided by a guide rail 45a provided inside the central support 45.
4a are formed, a corner portion 74a and a guide rail 45a are formed.
The slider 74 can move straight in the front-rear direction. A lever 75 extending downward is attached to the slider 74.

On both sides of the central support 45, through-grooves 45b, 45b for inserting the arms 614, 624 of the left and right moving bodies 61, 62 from both the left and right sides are formed.
The grooves 615 and 625 of the arms 614 and 624 inserted into the center support 45 from the through grooves 45b and 45b include:
The lever 75 is engaged from above.

FIG. 11 is a sectional view showing the internal structure of the binoculars. As shown in FIG. 11, a driving ring 71a is fixed inside the rolling wheel 71, and two projections 76 and 77 are provided on the inner surface of the driving ring 71a. The screw 73 is a double thread, and the projections 76 and 77 are engaged with the respective threads. When the rolling wheel 71 is rotated, the screw 73 moves straight. And
Arm 6 via slider 74 and lever 75 (FIG. 10)
14, 624 move back and forth, and the moving bodies 61, 62 move. FIG. 12 shows a state where the eyepiece is most protruded.

Here, as shown in FIG. 11, the size of the binoculars of the embodiment is reduced by storing the eyepiece inside the binoculars main body when not in use. The strokes (moving distances from FIG. 11 to FIG. 12) of the moving bodies 61 and 62 include a stroke for focus adjustment and a stroke for storing / projecting the eyepiece. That is, FIG.
When the wheel is operated from the state shown in FIG.
The eyepiece is moved from the non-observable state to the observable state in the first 7 mm of the total stroke of 11 mm, and focus adjustment is performed in the next 4 mm.

FIGS. 13 and 14 are a side view of the screw 73 and a cross-sectional view of the wheel 71. The screw 73 has a large lead (7 mm in this embodiment) corresponding to the accommodation / projection of the eyepiece, and a small lead (4 mm in this embodiment) corresponding to the focus adjustment. Is formed. Further, the groove 73a of the screw 73 has a V-shaped cross section, and the pins 76 and 77 of the rolling wheel 71 which engage with the groove 73 have a conical shape. Can be. With this configuration, the eyepiece can be stored / projected quickly and the focus can be finely and accurately adjusted.

When the moving bodies 61 and 62 (FIG. 11) are moved from the non-observable state to the observable state, the telescopic optical systems 10L and 10R are moved.
Is focused on infinity. Then, after the observation state is established, the rolling wheels 71 are further operated to move the moving bodies 61 and 62.
Is moved, the focus is adjusted from tele to wide.

As described above, according to the binoculars of the present embodiment, since both mirror bodies 21 and 22 slide symmetrically with respect to the center of the binoculars 1 in the width direction, the focal point disposed at the center of the binoculars 1 in the width direction. The adjustment wheel 71 is provided between the two mirror bodies 21 and 22.
Is always located at the center in the width direction of the binoculars 1 irrespective of the change in the interval of. Therefore, it is easy for both right-handed and left-handed observers to operate the wheel.

Further, when the binoculars are not used, the eyepieces 15L and 15R can be brought closer to the first lenses 11L and 111R until the binoculars cannot be observed. In other words, the size of the binoculars when not in use in the optical axis direction can be reduced accordingly, and portability is improved. In addition, storage of eyepiece /
The same mechanism (ie, the moving bodies 61 and 6)
2 movement in the direction of the optical axis), the configuration is simpler than in the case where the storage / projection of the eyepiece and the focus adjustment are performed by separate drive mechanisms.

Next, the diopter difference adjusting mechanism will be described.
As shown in FIGS. 11 and 12, the first objective lens system on the right side
The lens 11R is supported by a guide shaft 325 of the movable frame 32 so as to be movable in the optical axis direction. The first lens 11 </ b> L on the left side is fixed to the movable frame 31. The binoculars of the embodiment are configured to adjust the diopter by moving the first lens 11R of one (right) objective lens system in the optical axis direction.

FIG. 15 shows the left and right first lenses 11L and 11L.
It is a top view of binoculars which cuts out the attachment part of R.
To move the first lens 11R on the right side, the center support 4
5 is provided with a blade member 80 extending rightward.
An engaging groove 81 extending in the longitudinal direction is formed in the blade member 80. Two pins 18a, 18a are provided on the upper surface of the first lens frame 18 holding the right first lens 11R, and both pins 18a, 18a are engaged with the engagement grooves 81. That is, the right first lens 11R is moved by the movement of the blade member 80.

FIG. 16 shows the diopter difference adjusting knob. In the present embodiment, the diopter difference adjustment knob 90 is provided at the center in the width direction on the lower surface of the binoculars 1. Also, diopter adjustment knob 9
Reference numeral 0 denotes a disk shape, which is configured to be rotated around an axis orthogonal to the optical axis.

FIG. 17 is a perspective view of the interlocking state between the diopter adjustment knob 90 and the blade member 80 as viewed from below. In order to convert the rotation of the diopter difference adjusting knob 90 into the linear movement of the blade member 80, a drive pin 91 is erected above the rotary dial 90 so as to be eccentric by a predetermined amount with respect to the rotation center of the rotary dial 90. A driving member 83 having a concave portion that engages with the driving pin 91 is provided so as to be movable along the shaft 72 integrally with the blade member 80.

FIG. 18 is a diagram showing the operation of the driving member 83 by rotating the diopter difference adjusting knob 90. Note that, in FIG. 18, the drive member 83 and the diopter difference adjustment knob 90 are separately shown in a state viewed from directly below for easy understanding. FIG.
As shown in FIG. 8A, in a state where the diopter difference adjusting knob 90 is set to 0 (reference position), the drive pin 91 is moved in the horizontal direction (binocular width direction) with respect to the rotation center of the diopter difference adjusting knob 90. ).

When the diopter adjustment knob 90 is rotated clockwise from the state shown in FIG. 18A as shown in FIG. 18B, the drive pin 91 is moved more than the rotation center of the diopter difference adjustment knob 90. Move forward and drive member 83 is advanced. That is, the blade member 80 is moved forward. FIG.
When the diopter adjustment knob 90 is rotated counterclockwise as shown in FIG.
The driving member 83 moves backward from the center of rotation 0, and retreats. That is, the blade member 80 is moved backward.

As described above, since the diopter adjustment knob 90 can be provided rotatable about an axis orthogonal to the optical axis, the diopter adjustment knob 90 is provided on the lower surface of the binoculars 1 as shown in FIG. Can be provided. As a result, it is possible to operate easily and to save space.

Further, as shown in FIG. 19 as a partial cross-sectional view of the binoculars 1, the surface of the diopter difference adjusting knob 90 coincides with the outer surface of the outer case 51 (52) and protrudes from the outer surface. What is done are symbols such as ".""+" And "-" (FIG. 18) and knurls. With such a configuration, the entire binoculars 1 becomes compact. Also,
By using symbols such as “•”, “+”, and “−” and the grip between the knurl and the finger, the diopter adjustment knob 90 can be easily rotated with the finger.

In FIGS. 17 and 18, the driving member 83 can be fixed to the blade member 80. In this embodiment, the diopter difference can be finely adjusted before the binoculars are shipped from the factory or after parts are replaced. Therefore, the positional relationship between the driving member 83 and the blade member 80 can be adjusted.

That is, as shown in FIG.
Is provided with a plate-like portion 95 facing the front of the drive member 83, a screw 93 is screwed into the drive member 83 through the plate-like portion 95, and a spring 96 is arranged around the screw 93. That is, when the screw 93 is tightened or loosened,
The relative position of the blade member 80 in the optical axis direction with respect to the driving member 83 can be finely adjusted.

In order to insert a tool for operating the screw 93, a tool insertion hole 97 is formed in the center support 45, and the insertion hole 97 is hidden by a decorative seal 98 on the front surface of the center support 45. . For this reason, the distance between the two mirror bodies 21 and 22 is widened (FIG. 16), the decorative seal 98 is peeled off, and the tool is inserted through the tool playing hole 97, thereby rotating the screw 93 and finely adjusting the diopter difference. It can be carried out.

As described above, the binoculars according to the present embodiment include the eyepieces 15L, 15R of the left and right telephoto optical systems and the prism group (the auxiliary prisms 12L, 12R and the roof prism 13L,
13R) is held by the moving bodies 61 and 62, and can be integrally moved in the optical axis direction of the eyepieces 15L and 15R. With such a configuration, the eyepiece 15
L, 15R and the prism group, the eyepiece 15L,
There is no need to provide an interval enough to allow the movement of the eye 15R, and the eyepieces 15L and 15R and the prism group can be arranged closer to each other.

[0064]

As described above, the binoculars according to the present invention are capable of moving the eyepiece lens system and the erecting optical system integrally in the optical axis direction of the eyepiece lens system. There is no need to provide an interval between the system and the eyepiece system to allow movement of the eyepiece system. for that reason,
The erecting optical system and the eyepiece lens system can be arranged closer to each other, and the binoculars can be reduced in size.

[Brief description of the drawings]

FIG. 1 is a perspective view of binoculars of the present embodiment.

FIG. 2 is a diagram showing an optical system of the binoculars of FIG.

FIG. 3 is an exploded perspective view of the binoculars of FIG.

FIG. 4 is a perspective view showing a movable frame.

FIG. 5 is a perspective view showing a state in which a movable frame is attached to a bottom plate.

FIG. 6 is a perspective view showing a sliding operation of the movable frame.

FIG. 7 is a perspective view showing a structure for attaching an outer case to a movable frame.

FIG. 8 is a perspective view showing a sliding operation of right and left mirror bodies.

FIG. 9 is a plan view showing a structure of a moving body.

FIG. 10 is a perspective view showing an operation member.

FIG. 11 is a plan view showing the internal structure of the binoculars.

FIG. 12 is a plan view showing the internal structure of the binoculars.

FIG. 13 is a plan view showing a screw.

FIG. 14 is a cross-sectional view showing a rolling wheel.

FIG. 15 is a plan view showing the internal structure of the binoculars.

FIG. 16 is a perspective view showing a diopter difference adjustment knob.

FIG. 17 is a perspective view showing a diopter difference adjusting mechanism.

FIG. 18 is a schematic view showing the operation of the blade member.

FIG. 19 is a partial cross-sectional view of binoculars.

[Explanation of symbols]

 Reference Signs List 1 binoculars 11L, 11R first lens 12L, 12R auxiliary prism 13L, 13R roof prism 14L, 14R second lens 15L, 15R eyepiece 21, 22 mirror body (casing) 25 support frames 31, 32 movable frames 310a, 310b, 320a, 320b Guide groove 36 Pinion 41 Bottom plate 413, 414, 415, 416 Pin 42 Top plate 45 Central support body 51, 52 Outer case 61, 62 Moving body 614, 624 Arm 70 Operation unit 71 Roller 73 Screw 80 Blade member 90 Diopter Difference adjustment knob 91 Drive pin

Claims (9)

[Claims] 1. A pair of binoculars, wherein in each of the left and right telephoto optical systems, an eyepiece lens system and an erecting optical system can be integrally moved in an optical axis direction of the eyepiece lens system. 2. The eyepiece lens system and the erecting optical system are held by a pair of left and right moving bodies movably provided in an optical axis direction of the eyepiece lens system. Item 2. Binoculars according to item 1. 3. The moving body according to claim 2, wherein the eyepiece lens system can move so as to approach the front lens of the objective lens system until the telephoto optical system becomes unobservable. The binoculars described in 1. 4. The binoculars according to claim 2, wherein focus adjustment is performed by moving the moving body. 5. A moving area of the moving body includes a first area and a second area, and in the first area, the eyepiece lens is set to a position where the telephoto optical system is in a non-observable state and an observable state. 5. The binoculars according to claim 4, wherein the binoculars are moved to a position in which the focus adjustment is performed in the second area. 6. The binoculars according to claim 2, wherein the moving body further holds an eyepiece member for covering an eye of an observer. 7. The binoculars according to claim 2, wherein the movable body further holds a field frame member that defines a field of view of the telephoto optical system. 8. A moving mechanism for moving the left and right moving bodies in an interlocked manner.
8. Binoculars according to any one of items 1 to 7. 9. An arm member is formed to protrude inward in the width direction of the binoculars from the left and right moving bodies, and the left and right moving bodies are moved in the optical axis direction by the moving mechanism via the arm members. The binoculars according to claim 8, wherein the binoculars are driven.