JP3365933B2 - binoculars - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to binoculars, and more particularly to binoculars for adjusting the interpupillary distance by horizontally moving left and right eyepieces.

[0002]

2. Description of the Related Art Conventionally, binoculars have been known in which the left and right eyepieces are horizontally moved to adjust the interpupillary distance. In such binoculars, with the right and left telescope optical system are respectively accommodated in the pair of left and right casings, left casing is held so as to be slid in the width direction of the binoculars by the right of the casing. That is, in the state where the eye width is the minimum, most of the left side casing is housed in the right side casing, and the left side casing is pulled out from the right side casing in the width direction of the binoculars as the eye width is widened. Has been done.

[0003]

However, in such a pair of binoculars, there is a problem that the right casing is lowered in rigidity because the portion of the right casing pulled out is hollow. .

In view of the above circumstances, it is an object of the present invention to provide binoculars having a casing with high rigidity.

[0005]

Means for Solving the Problems] To achieve the above object, binoculars according to the present invention includes a pair of casings comprising each the left and right telescope optical system, and toward and together the casings in the width direction of the binoculars The left and right casings are composed of a pair of left and right movable frames movably provided by the support frames in the width direction of the binoculars, and the movable frame. It is composed of a pair of left and right exterior cases that are fixed to each other. With this configuration, the left and right casings can form a box (shell) by the movable frame and the outer case, respectively, and a highly rigid structure can be obtained.

Further, the support frame is provided with a top plate and a bottom plate located above and below the left and right movable frames, and each of the left and right movable frames is provided with a bottom surface on which the bottom plate is placed and an abutting surface in contact with the top plate. The movable frame may be movably held by the bottom surface and the contact surface of each movable frame slidingly contacting the bottom plate and the top plate, respectively.

Further, each exterior frame may be provided so as to sandwich the bottom plate and the top plate between each movable frame. According to this structure, the top plate and the bottom plate are located inside the outer case, and do not hinder the observer from gripping the outer case. Further, each movable frame and the outer case can be fixed at the front end, the rear end and the side end of the binoculars.
That is, since the top plate and the bottom plate are located above and below the movable frame, the outer case can be attached at a position other than the top and bottom.

Further, the front end and the rear end of each movable frame can be provided with contact portions that contact the outer case from the inside. With this configuration, the movable frame can be positioned with respect to the outer case. Also,
If the bottom plate, the top plate, and the movable frame are made of metal, a more rigid structure can be obtained.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. Binoculars of this embodiment moves symmetrically left and right telescope optical system with respect to the width direction center portion of the binoculars has been configured to perform eye width adjustment, the magnitude of the distance between the eyepiece Regardless, the focus adjusting operation member is configured to be positioned at the center of the binoculars in the width direction. Hereinafter, a detailed description will be given with reference to the drawings.

FIG. 1 is a perspective view showing the binoculars 1 of this embodiment. The binoculars 1 includes a pair of left and right mirror bodies (casing) 21, which are symmetrically movable with respect to the widthwise center of the binoculars.
22 and a support frame 25 that supports both mirror bodies.

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 lens and an objective lens are arranged on the same straight line. As shown in FIG. 2, the left and right mirror bodies 21, 2 of the binoculars 1 are
The 2, a pair of right and left telescope optical systems 10L, 10R are accommodated. Each telescope optical system 10L, 10R is incident optical axis OAL indicated by a chain line in the figure, along the OAR, first lens 11L, 11R, the auxiliary prism 12L, 12R, roof prism 13L, 13R, and the second lens 14L, 14
R, eyepiece lenses 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 magnified and observed by the eyepiece lenses 15L and 15R.

Next, a pair of left and right mirror bodies 21, 2 shown in FIG.
A configuration for making the 2 movable symmetrically with respect to the widthwise center of the binoculars will be described. In the following description, the objective side of the binoculars is called the front and the eyepiece side is called 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, 22 includes a bottom plate 41 and a top plate 42, which are two parallel plate members, and a bottom plate 41.
The central support member 45 provided between the top plate 42 and the top plate 42 serves as a column in the height direction of the binoculars to form a horizontal H-shaped frame.

[0015] left and right telescope optical system 10L, 10R each lens and prism (FIG. 3 respectively the optical axis OA (Fig. 2)
L and OAR) are supported by a pair of left and right movable frames 31 and 32 movably provided in the width direction of the binoculars between the bottom plate 41 and the top plate 42. In addition, the movable frame 3
A pair of left and right outer casings 51 and 52, which are portions to be grasped by an observer, are fixed to the first and second casings 32 and 32, respectively. The left and right movable frames 31 and 32 and the exterior cases 51 and 52 form the mirror bodies 21 and 22 (FIG. 1).

FIG. 4 shows the left and right movable frames 31, 32,
FIG. 3 is a perspective view showing a bottom plate 41 that supports both movable frames. The movable frame 31 and 32, telescope optics 10L described above, 10R is an optical system holding portion 310 for holding the lenses and the prism (Fig. 2) is provided.

The ends of the holding parts 310 and 320 corresponding to the left end and the right end of the binoculars are bent vertically upward to form side wall parts 311 and 321. In addition, the holding unit 31
In the central area of 0,320, there are substantially rectangular openings 312, 32.
2 is formed.

At the front end and the rear end of the holding part 310 of the movable frame 31, a pair of standing parts 313, 314 standing upright in the vertical direction are formed at a predetermined distance from the side wall part 311. Between the side wall portion 311 and the upstanding portion 313 and 314, left telescope optical system 10L (FIG. 2) is held. Similarly, standing 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 3 is formed.
Between 21 and the upstanding portion 323 and 324, right-hand telescope light <br/> Science system 10R (FIG. 2) is held.

A guide shaft 315 parallel to the side wall portion 311 is stretched between the standing portions 313 and 314 of the holding portion 310 of the movable frame 31 to hold the holding portion 32 of the movable frame 32.
A guide shaft 325, which is parallel to the side wall portion 321, is bridged between the standing portions 323 and 324 of 0. Both guide shafts 31
Reference numerals 5 and 325 serve as guides for moving the eyepiece lens 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 and 310b are formed respectively. Similarly, guide grooves 320a and 320b extending in the width direction of the binoculars are formed near the front end and the rear end of the optical system holding portion 320 of the movable frame 32, respectively.

Pins 413, 41 are provided at the four corners of the bottom plate 41.
4, 415 and 416 are planted, and each movable frame 31
Through the guide grooves 310a, 310b of the movable frame 32 and the guide grooves 320a, 320b of the movable frame 32. Guide grooves 310a, 3
10b, 320a, 320b and pins 413, 414, 4
Movable frames 31, 32 by engagement with 15, 416
Is regulated 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 extending portions 331, 332 that are parallel to each other extend toward the holding portion 320 of the movable frame 32.
From the holder 320 of the movable frame 31 to the holder 31 of the movable frame 31.
A pair of extending portions 341 and 342 extend toward 0.

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

Further, in the center of the bottom plate 41 in the width direction of the binoculars,
The engaging groove 333 of the movable frame 31 and the pin 411 that engages with the engaging groove 343 of the movable frame 32, and the movable frame 3
A pin 412 that engages with the first engaging groove 334 and the engaging groove 344 of the movable frame 32 is planted.

In FIG. 5, the movable frames 31 and 32 are attached to the bottom plate 4
The state attached to 1 is shown. When the movable frames 31 and 32 are attached to the bottom plate 41, the extension part 3 of the movable frame 31 is
31, 332 and extending portions 341, 34 of the movable frame 32
2 and 2 are arranged so that the movable frame 32 side faces up.

The central support member 45 is arranged at the central portion in the width direction of the bottom plate 41 so as to straddle the extending portions of the movable frames 31 and 32. The object side extension 331 of the movable frame 31 and the eyepiece side extension 342 of the movable frame 32.
Racks 335 and 345 are formed to face each other.
5 is engaged with a pinion 36 provided on the lower portion of

Further, as shown in FIG. 3, the movable frame 3
1. Upper end surfaces 313a and 314 of the rising portions 313 and 314 of FIG.
The a and the upper end surfaces 323a and 324a of the rising portions 323 and 324 of the movable frame 32 are contact surfaces that contact the lower surface of the top plate 42. In this way, the movable frame 31,
The position of 32 is vertically regulated by the bottom plate 41 and the top plate 42. Thus, the movable frames 31 and 32 have the bottom plate 4
It is supported slidably in the width direction of the binoculars by a horizontal H-shaped support frame 25 composed of 1, the top plate 42, and the central support body 45.

FIG. 6 shows the movable frame 3 on the bottom plate 41.
It is a top view which shows the sliding state of 1,32. The movable frames 31 and 32 have pins 41 that are planted on the bottom plate 41.
3, 414, 415, 416 and the guide grooves 310a, 31
By engaging with 0b, 320a, 320b, it is slidable only in the width direction of the binoculars. Further, the pinion 36 is mounted on the racks 335, 34 of the movable frames 31, 32.
As shown in FIGS. 6A and 6B, since the movable frames 31 and 32 are engaged with each other, the movable frames 31 and 32 can move in opposite directions by the same amount.

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 a mounting structure of the right movable frame 32 and the outer case 52. Note that, 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 facing 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 an opening as a whole, and the outer edge portion 52 for attaching the rear end cover 529 is provided on the inner edge of the opening in the width direction of the binoculars.
3 is formed.

A pair of upright portions 323 of the movable frame 32.
A contact portion 346 of the front rising portion 323 of the reference numeral 324 is formed so as to horizontally project toward the front and contact the wall 521 of the exterior case 52. In addition, the standing portion 3 on the eyepiece side
Reference numeral 24 is bent toward the eyepiece side, and the upper and lower ends of the bent portion are contact portions 347 that contact the outer edge portion 523 of the outer 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 portion of the outer 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
The rear end cover 529 fitted into the second outer edge portion 523 has a through hole 526 at a position corresponding to the screw hole 324a. Then, 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 contact the contact portions 346 and 347 with the wall 521 and the outer edge portion 523, and the screw holes 348, 324a and 34.
It is fixed by tightening the screws 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 positions other than the top and bottom of the movable frame 32, that is, the front and rear ends and the side ends.
2 and are fixed. The left mirror 21 and the movable frame 31 are similarly fixed.

Due to this structure, the left and right mirror bodies 21, 22 are supported by the horizontal H-shaped support frame 25, and as shown in the schematic sectional views of 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 (casing) 21 and 22 composed of 1, 32 and the outer cases 51 and 52 respectively form a box body (shell), a highly rigid structure can be obtained. In addition, in order to further increase the rigidity of the left and right mirror bodies 21 and 22, the movable frame 3
1, 32 and the outer cases 51, 52 are made of metal.

Further, since the left and right mirror bodies 21 and 22 are supported by the horizontal H-shaped support frame 25 including the bottom plate 41, the top plate 42 and the central support body 45, as shown in FIG. 8B. , Even when the space between the left and right mirror bodies 21, 22 is widened,
The rigidity of the entire binoculars 1 is maintained. The bottom plate 41 and the top plate 42 are made of metal in order to increase the rigidity of the entire binoculars 1.

Next, the structure for housing the eyepiece will be described. Binoculars of the present embodiment, among the <br/> telescope optical system of the left and right as shown in FIG. 2, the auxiliary prism 12L, and the eyepiece 15L, the portion up to 15R and the left and right respectively one unit from the 12R, the optical axis OAL, OAR The eyepiece is housed and the focus is adjusted by moving the eyepiece.

Therefore, the movable frames 31 and 32 (FIG. 3) are provided with a pair of left and right moving bodies that hold the respective prisms and lenses and move along the optical axis. FIG. 9 shows the left moving body 61 attached to the left movable frame 31.
FIG. The right-side moving body 62 is symmetrical to the left-side moving body 61 with respect to the center in the width direction of the binoculars.

As shown in FIG. 9, a prism holder 63 holding the auxiliary prism 12L and the roof prism 13L, and a lens holder 65 holding the second lens 14L and the eyepiece lens 15L of the objective lens system are attached to the moving body 61. . A cosmetic ring 67 is attached to the tip of the eyepiece lens 15.
Is attached.

At the right end of the moving body 61, the movable frame 31
Insertion holes 611 and 612 for inserting the guide shaft 315 extending in the optical axis direction, which is provided in the optical disk, are formed. Further, a protrusion 613 that comes into contact with the side wall portion 311 of the movable frame 31 from above is provided at the left end of the moving body 61.
Thus, the moving body 61 is supported by the movable frame 31 so as to be movable in the optical axis direction.

Further, an arm 614 extending rightward is formed at the right end of the moving body 61, and the arm 614 has an arm 614.
Engagement grooves 615 extending in the width direction of the binoculars are formed.

FIG. 10 is a perspective view showing an operating portion 70 for driving the moving bodies 61, 62. As shown in FIG. 10, inside the central support body 45, an operating wheel 71 is provided 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 the tip of the screw 73.
Slider 7 that guides only 3 in the front-back 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 body 45.
4a is formed, the corner portion 74a and the guide rail 45a are formed.
By sliding with the slider 74, the slider 74 can move straight forward and backward. Further, a lever 75 extending downward is attached to the slider 74.

Through holes 45b, 45b for inserting the arms 614, 624 of the left and right moving bodies 61, 62 from the left and right sides are formed on both side surfaces of the central support body 45.
In the grooves 615 and 625 of the arms 614 and 624 inserted into the central support body 45 from the through grooves 45b and 45b,
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 drive ring 71a is fixed inside the wheel 71, and two protrusions 76 and 77 are provided on the inner surface of the drive ring 71a. The screw 73 is a double thread, and the projections 76 and 77 are engaged with the respective threads. When the 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 portion is most protruded.

Here, as shown in FIG. 11, the binoculars of the embodiment are miniaturized by accommodating the eyepiece in the main body of the binoculars when not in use. The strokes of the moving bodies 61 and 62 (moving distances from FIG. 11 to FIG. 12) include a stroke for focus adjustment and a stroke for housing / projecting the eyepiece. That is, FIG.
When the rollers are operated from the state shown in FIG.
Of the total stroke of 11 mm, the eyepiece is moved from the unobservable state to the observable state in the first 7 mm, and focus adjustment is performed in the next 4 mm.

13 and 14 are a side view of the screw 73 and a cross-sectional view of the rolling wheel 71. The screw 73 has a large lead (7 mm in this embodiment) in the portion A corresponding to the accommodation / projection of the eyepiece, and a small lead (4 mm in this embodiment) in the portion B corresponding to focus adjustment. Has been 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 engaging with the screw 73 have a conical shape, so that the portion where the lead changes in the groove can slide smoothly. You can With this structure, the eyepiece can be quickly stored / projected, and the focus can be finely and accurately adjusted.

[0048] Incidentally, the mobile 61 and 62 (FIG. 11), when Nozomu <br/> far mirror optical system 10L, 10R is moved from the unobservable state until observable state, telescope optics 10L, 1
The focus of 0R is on infinity. Then, after the observable state, the rolling wheel 71 is further operated to move the moving body 61,
By moving the 62, focus adjustment is performed as infinity distance to a close.

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

When the binoculars are not used, the eyepiece lenses 15L and 15R can be brought close to the first lenses 11L and 111R until the observation is impossible. That is, the size of the binoculars in the optical axis direction when not in use can be reduced so much, and the portability is improved. Also, store the eyepiece /
The protrusion and the focus adjustment have the same mechanism (that is, the moving bodies 61 and 6).
2 is moved in the direction of the optical axis), the structure is simpler than the case where the accommodation / 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 is
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. One left side first lens 11L is fixed to the movable frame 31. The binoculars of the embodiment are configured to adjust the diopter difference by moving the first lens 11R of the 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 the binoculars which notches and shows the attachment part of R.
In order to move the first lens 11R on the right side, the central support 4
5 is provided with a blade member 80 extending rightward.
An engagement 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 that holds the first lens 11R on the right side, and both pins 18a, 18a are engaged with the engagement groove 81. That is, the right first lens 11R is moved by the movement of the blade member 80.

FIG. 16 shows the diopter difference adjustment knob. In the present embodiment, the diopter difference adjustment knob 90 is provided on the lower surface of the binoculars 1 at the center in the width direction. Also, the diopter difference 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 of the diopter difference adjusting knob 90 and the blade member 80 as seen from below. In order to convert the rotation of the diopter difference adjustment knob 90 into the linear movement of the blade member 80, a drive pin 91 is erected on the upper part of 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 drive member 83 having a recess that engages with the drive pin 91 is provided movably along the shaft 72 integrally with the blade member 80.

FIG. 18 is a diagram showing the operation of the drive member 83 by the rotation operation of the diopter difference adjustment 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 the sake of clarity. Figure 1
As shown in FIG. 8 (a), when the diopter difference adjustment knob 90 is set to 0 (reference position), the drive pin 91 moves in the lateral direction (binocular width direction) with respect to the rotation center of the diopter difference adjustment knob 90. ) Is lined up.

When the diopter difference adjusting knob 90 is rotated clockwise from the state shown in FIG. 18A as shown in FIG. It moves forward and advances the drive member 83. That is, the blade member 80 is moved forward. In addition, FIG.
As shown in (c), when the diopter difference adjusting knob 90 is rotated counterclockwise, the drive pin 91 is moved to the diopter difference adjusting knob 9.
It moves rearward from the center of rotation of 0 and retracts the drive member 83. That is, the blade member 80 is moved backward.

As described above, since the diopter difference adjusting knob 90 can be provided rotatably around the axis orthogonal to the optical axis, the diopter difference adjusting knob 90 is provided on the lower surface of the binoculars 1 as shown in FIG. Can be provided. As a result, there is an effect that the operation is easy and the space is not required.

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

17 and 18, the drive member 83 can be fixed to the blade member 80, but in this embodiment, it is possible to finely adjust the diopter difference before the factory shipment of the binoculars or after the parts are replaced. Therefore, the positional relationship between the drive member 83 and the blade member 80 can be adjusted.

That is, as shown in FIG. 18, the blade member 80
Is provided with a plate-shaped portion 95 facing the front of the drive member 83, a screw 93 is screwed into the drive member 83 through the plate-shaped 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 with respect to the drive member 83 in the optical axis direction can be finely adjusted.

In order to insert a tool for operating the screw 93, a tool insertion hole 97 is formed in the central support member 45, and the insertion hole 97 is hidden by a decorative seal 98 on the front surface of the central support member 45. . Therefore, the interval between the two mirror bodies 21, 22 is widened (FIG. 16), the decorative seal 98 is peeled off, and the tool is inserted through the tool insertion hole 97, thereby rotating the screw 93 and finely adjusting the diopter difference. be able to.

As described above, according to the binoculars of the present embodiment, the left and right mirror bodies (casing) 21 and 22 constitute the box body (shell) by the movable frames 31 and 32 and the exterior cases 51 and 52, respectively. A highly rigid structure can be obtained.
Also, even when the distance between the left and right mirror bodies 21, 22 is widened,
The rigidity of the entire binoculars 1 is maintained.

[0063]

As described above, according to the binoculars of the present invention, since the left and right casings form a box (shell) by the movable frame and the outer case, a structure having high rigidity can be obtained.

[Brief description of 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 a movable frame.

FIG. 7 is a perspective view showing a mounting structure of an exterior case to a movable frame.

FIG. 8 is a perspective view showing a sliding operation of the left and right 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 binoculars.

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

FIG. 13 is a plan view showing a screw.

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

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

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

FIG. 17 is a perspective view showing a diopter difference adjustment 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]

1 binoculars 11L, 11R first lens 12L, 12R auxiliary prism 13L, 13R roof prism 14L, 14R 2nd lens 15L, 15R eyepiece 21,22 Mirror (casing) 25 Support frame 31, 32 Movable frame 310a, 310b, 320a, 320b Guide groove 36 pinion 41 Bottom plate 413, 414, 415, 416 pins 42 Top plate 45 Central support 51,52 Exterior case 61,62 mobile 614, 624 arm 70 Operation unit 71 rolling wheels 73 screws 80 blade members 90 Diopter difference adjustment knob 91 Drive pin

Continuation of front page (56) Reference JP-A-8-220446 (JP, A) JP-A-3-144413 (JP, A) JP-A-53-83758 (JP, A) JP-A-8-36135 (JP , A) Jitsukai Hei 7-8820 (JP, U) JP 38-87594 (JP, B1) JP 38-16582 (JP, B1) JP 39-25697 (JP, Y1) JP 53-50447 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) G02B 7/12

Claims (5)

(57) [Claims] 1. Binoculars comprising a pair of left and right casings each including left and right telescope optical systems, and a support frame for supporting the left and right casings so as to be movable in the width direction of the binoculars, wherein the support frame comprises: There is a top plate and a bottom plate, each of the casing has an optical system holding frame for holding the telescope optical system, and an outer case fixed to the frame, the optical system holding frame, at least a part The bottom plate is disposed between the top plate and the bottom plate, has a bottom surface on the bottom plate, and has an abutting surface in contact with the top plate, and the exterior case is between the bottom plate and the optical system holding frame. Binoculars characterized by being provided so as to sandwich the top plate. 2. The binoculars according to claim 1, wherein the exterior case is fixed to the optical system holding frame at a front end, a rear end, and a side end of the binoculars. 3. The binoculars according to claim 2, wherein the front end and the rear end of the optical system holding frame are provided with contact portions that contact the outer case from the inside. 4. The bottom plate and the top plate are made of metal,
The binoculars according to any one of claims 1 to 3. 5. The binoculars according to claim 1, wherein the optical system holding frame is made of metal.