JP3515682B2 - 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 equipped with a focus adjusting mechanism and a diopter difference adjusting mechanism.

[0002]

2. Description of the Related Art Conventionally, binoculars having a focus adjusting mechanism and a diopter difference adjusting mechanism have been known. Such binoculars enable a pair of lens groups belonging to the left and right telescopic optical systems to move in the optical axis direction, and perform focus adjustment by moving the pair of lens groups in parallel with each other. The diopter difference adjustment is performed by moving either the right or left of the lens group of the set.

[0003]

However, in such a pair of binoculars, there is a problem that the driving mechanism for moving the lens group becomes complicated because it drives the left and right sides or one side of the lens group. Further, when the driving mechanism becomes complicated, there is a problem in that driving is likely to occur and the positional accuracy of the lens group deteriorates.

In view of the above circumstances, it is an object of the present invention to provide binoculars capable of performing focus adjustment and diopter adjustment with a simple structure.

[0005]

In order to achieve the above object, the binoculars of the present invention include focus adjusting means for performing focus adjustment by moving a predetermined lens group of the left and right telescopic optical systems in conjunction with each other, And a diopter difference adjusting means for adjusting the diopter difference by moving one of the left and right telephoto optical systems other than the predetermined lens group.

As described above, by separately providing the lens group that moves for focus adjustment and the lens that moves for diopter difference adjustment, the drive mechanism for moving the lens is used for focus adjustment and diopter difference. The adjustment mechanism can be provided independently, and the structure of the drive mechanism can be simplified. Further, since the structure of the driving mechanism is simplified, the amount of driving is reduced and the positional accuracy of the lens group is improved.

The above-mentioned predetermined lenses belonging to the above-mentioned eyepiece optical system are all lenses of the eyepiece optical system, and the above-mentioned predetermined lenses belonging to the objective optical system are respectively arranged as the frontmost lenses in the objective optical system. be able to. With this configuration, the drive mechanism (for adjusting the diopter difference) for driving the lens can be arranged separately from the drive mechanism for adjusting the focus.

Further, the focus adjusting means may be configured to further move the lens other than the frontmost lens of the objective optical system and the erecting optical system together with the eyepiece optical system. According to this structure, the eyepiece optical system, the lens excluding the frontmost lens of the objective optical system, and the erecting optical system can be unitized.

Further, the eyepiece optical system can be configured so as to be able to come close to the frontmost lens of the objective optical system until it becomes unobservable. With this configuration, the size of the binoculars when not in use (when not being observed) can be reduced in the optical axis direction, and portability can be improved.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. The binoculars of the present embodiment are configured so that the left and right telescopic optical systems are moved symmetrically with respect to the widthwise center of the binoculars to adjust the eye width, regardless of the size of the distance between the two eyepieces. Instead, the operation member for focus adjustment is configured to be located in 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
A pair of left and right telescopic optical systems 10L and 10R are housed in the second unit 2. Each of the telephoto optical systems 10L and 10R includes the first lens 1 along the incident optical axes OAL and OAR indicated by the alternate long and short dash lines in the figure.
1L, 11R, auxiliary prisms 12L, 12R, roof prisms 13L, 13R, and second lenses 14L, 14R,
It is composed of eyepiece lenses 15L and 15R.

The first lenses 11L and 11R and the second lenses 14L and 14R respectively form an objective optical system, and the field frame 16 is located at a position where an image is formed by the objective optical system.
L and 16R are provided. The image formed by the objective optical system is magnified by the eyepiece lenses 15L and 15R,
To be observed.

Next, a pair of left and right mirror bodies 21 and 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 (the side closer to the subject) is called the front and the eyepiece side (the side closer to the observer) is called the rear. The direction parallel to the optical axes OAL and OAR in FIG. 2 is simply referred to as the "optical axis direction".

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.

Left and right telescopic optical systems 10L and 10R (FIG. 2)
Lens and prism (in FIG. 3, optical axes OAL and O respectively)
AR) is supported by a pair of left and right slide frames 31, 32 movably provided in the width direction of the binoculars between the bottom plate 41 and the top plate 42. Further, a pair of left and right exterior cases 51, 52 which are portions to be gripped by an observer are fixed to the slide frames 31, 32. The left and right slide frames 31, 32 and the outer cases 51, 52
Constitute the mirror bodies 21 and 22 of FIG.

FIG. 4 shows the left and right slide frames 31, 3
FIG. 2 is a perspective view showing a bottom plate 41 that supports 2 and both slide frames. The slide frames 31 and 32 are a pair of left and right plate-shaped members having openings 312 and 322 formed in the central portions thereof. Ends of the slide frames 31 and 32 corresponding to the left end and the right end of the binoculars are bent vertically upward to form side wall parts 311 and 321.

At the front end and the rear end of the slide frame 31, a pair of standing portions 313, 314 are formed at a predetermined distance from the side wall portion 311 so as to stand vertically upward. The left-side telescopic optical system 10L (FIG. 2) is held between the side wall portion 311 and the rising portions 313 and 314. Similarly,
Standing portions 323 and 324 are formed at the front and rear ends of the holding portion 320 of the slide frame 32, and the right side telescopic optical system 10R is provided between the side wall portion 321 and the standing portions 323 and 324.
(FIG. 2) is retained.

Both upright portions 313 of the slide frame 31.
A guide shaft 315 extending in the front-rear direction is bridged between the 314, and both the upright portions 323, 32 of the slide frame 32.
A guide shaft 325 extending in the front-rear direction is bridged between the four. The two guide shafts 315 and 325 serve to guide the eyepiece optical system and the prism when they are moved in the front-rear direction (details will be described later).

Guide grooves 310a, 310b extending in the width direction of the binoculars are provided near the front and rear ends of the slide frame 31.
Are formed respectively. Similarly, the slide frame 32
Guide grooves 320a and 320b extending in the width direction of the binoculars are formed near the front end and the rear end, respectively.

At the four corners of the bottom plate 41, four pins 413,
414, 415, 416 are planted and engaged with the guide grooves 310a, 310b of the slide frame 31 and the guide grooves 320a, 320b of the slide frame 32, respectively. Guide grooves 310a, 310b, 320a, 320b and pin 41
Due to the engagement with 3, 414, 415, 416, the slide frames 31, 32 are restricted in position on the bottom plate 41 so as to be movable only in the binoculars width direction.

From the right end of the slide frame 31, a pair of extending portions 331 parallel to the slide frame 32 are provided.
332 extends from the left end of the slide frame 32 toward the slide frame 31 and a pair of extending portions 34.
1,342 is extended. Engaging grooves 333 and 334 extending in the width direction of the binoculars are formed in the extending portions 331 and 332, respectively. Similarly, the engaging grooves 34 are formed in the extending portions 341 and 342.
3, 344 are formed respectively.

FIG. 5 shows a state in which the slide frames 31 and 32 are attached to the bottom plate 41. Slide frame 3
When 1 and 32 are attached to the bottom plate 41, the extending portions 331 and 332 of the slide frame 31 and the extending portions 341 and 342 of the slide frame 32 are arranged so that the slide frame 32 side faces up.

The engaging groove 333 of the slide frame 31 and the engaging groove 343 of the slide frame 32 are engaged with a pin 411 planted in the center of the bottom plate 41 in the width direction of the binoculars, and the engaging groove 334 of the slide frame 31. And slide frame 3
A pin 412 planted in the center of the bottom plate 41 in the width direction of the binoculars is engaged with the second engagement groove 344. Pin 411,4
12 is engaged with each engaging groove, the slide frame 31,
32 is guided in the width direction of the binoculars.

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

Further, as shown in FIG. 3, the upper end surfaces 313a, 31 of the rising portions 313, 314 of the slide frame 31.
4a and standing portions 323, 32 of the slide frame 32
The upper end surfaces 323a and 324a of No. 4 are contact surfaces that contact the lower surface of the top plate 42. Thus, the slide frames 31 and 32 are vertically regulated by the bottom plate 41 and the top plate 42. Thus, the slide frame 31,
32 is slidably supported in the width direction of the binoculars by a horizontal H-shaped support frame 25 including a bottom plate 41, a top plate 42, and a central support body 45.

FIG. 6 is a plan view showing a sliding state of the slide frames 31 and 32 on the bottom plate 41. The slide frames 31 and 32 include pins 413, 414, 415 and 416, which are implanted in the bottom plate 41, and guide grooves 310a,
By engaging with 310b, 320a, 320b, it is slidable only in the width direction of the binoculars. Further, the pinion 36 is mounted on the rack 33 of the slide frames 31 and 32.
Since they are engaged with 5, 345, the slide frames 31, 32 can move in the opposite directions by the same amount, as shown in FIGS. 6 (a) and 6 (b).

Next, the mounting structure of the slide frame and the outer case will be described. FIG. 7 is a perspective view showing a mounting structure of the right slide 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 slide frame 32 are omitted.

The outer case 52 is formed in a box shape having an opening inside in the width direction of the binoculars. A vertical wall 521 is formed at the front end of the outer case 52, and the first lens 11 of the objective optical system is formed.
An opening 522 for guiding incident light to R (FIG. 2) is formed. On the other hand, the entire rear end of the outer case 52 is an opening, and an outer edge portion 523 for attaching the rear end cover 529 is formed on a peripheral edge of the opening on the inner side in the binoculars width direction.

A pair of upright portions 32 of the slide frame 32
A contact portion 346 that protrudes horizontally toward the front and contacts the wall 521 of the outer case 52 is formed in the front rising portion 323 of the parts 3,324. Further, the standing portion 324 on the eyepiece side is bent rearward, 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.

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 slide 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 and 324a.
It is fixed by tightening screws on 349. That is, the bottom plate 41 and the top plate 4 are provided above and below the slide frame 32.
Since 2 is located, the slide frame 32 and the exterior case 52 are fixed at a position other than the top and bottom of the slide frame 32, that is, at the front and rear ends and the side ends. The left mirror 21 and the slide frame 31 are similarly fixed.

Due to this structure, the left and right mirror bodies 21 and 22 constituted by the slide frames 31 and 32 and the outer casings 51 and 52 are supported by the horizontal H-shaped support frame 25, as shown in FIG. As shown in schematic sectional views in a) and (b), it slides symmetrically with respect to the support frame 25.

In the binoculars of this embodiment, the left and right mirror bodies (casing) 21 and 22 made up of the slide frames 31 and 32 and the exterior cases 51 and 52 respectively form a box (shell), so that the structure has a high rigidity. Is obtained. The slide frames 31, 32 and the outer cases 51, 52 are made of metal in order to increase the rigidity of the left and right mirror bodies 21, 22.

The left and right mirror bodies 21, 22 are attached to the bottom plate 41.
Since it is supported by the horizontal H-shaped support frame 25 including the top plate 42 and the central support body 45, as shown in FIG. 8B, even if the distance between the left and right mirror bodies 21 and 22 is widened, the binoculars 1 The rigidity of the whole 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 holding the optical system in the left and right mirror bodies will be described. The binoculars according to the present embodiment include the auxiliary prisms 12L and 12R to the eyepieces 15 of the left and right telescopic optical systems 10L and 10R shown in FIG.
The parts up to L and 15R are left and right movable units, and the units are configured to be moved along the optical axes OAL and OAR to accommodate / project the eyepiece and adjust the focus.

Therefore, the slide frame 3 shown in FIG.
Reference numerals 1 and 32 denote a pair of left and right moving units 6 that hold each prism and lens and are movable along the optical axis.
a and 6b (not shown in FIG. 3) are provided. 9 and 1
Reference numeral 0 is an exploded perspective view and a plan view showing the right moving unit 6b. The left-side moving unit 6a is symmetrical to the right-side moving unit 6b with respect to the center in the width direction of the binoculars.

As shown in FIG. 9, the right moving unit 6
b is a prism holder 64 for holding a prism (described later)
And a lens holder 66 that holds a lens (described later), and a moving body 62 that supports these. A decorative ring 68, which is an exterior member of the eyepiece, is attached to the tip of the lens holder 66, and a rubber eye 68a is provided at the tip of the decorative ring 68.

The moving body 62 is composed of a base plate 62a on which the prism holder 64 is placed, and two vertical walls 62b and 62c provided at the rear end and the left end of the base plate 62a. The two vertical walls 62b and 62c form an L-shaped frame in a plan view, and a lens holder 66 is attached to the vertical wall 62b from the rear.

The slide frame 32 is provided on the vertical wall 62c.
Insertion holes 621, 62 for inserting the guide shaft 325 of
2 is formed, and an abutting portion 623 that comes into contact with the side wall portion 321 of the slide frame 32 from above is provided at the right end of the vertical wall 62b. Thus, as shown in FIG. 10, the moving body 62 is supported by the slide frame 32 so as to be movable in the front-rear direction.

Here, as shown in FIG. 11 as a perspective view of the moving body 62 viewed from the right rear, the side wall portion 32 of the slide frame 32 is provided at the right end of the base plate 62a of the moving body 62.
1 is provided with an abutting piece 626 that is bent upward so as to abut on the No. 1 from below. Slide frame 32
When the movable body 62 is attached to the contact piece 626, the contact piece 626 contacts the lower side of the side wall portion 321 in a slightly elastically deformed state. That is, the contact portion 623 and the contact piece 626 of the moving body 62 sandwich the side wall portion 312 from above and below. This prevents rotation of the moving body 62 around the guide shaft 325.

Further, the guide shaft 325 and the insertion holes 621, 62
In order to remove rattling due to the clearance with 2 (FIG. 9), a sliding contact portion 627 that slidably contacts the top plate 42 (FIG. 3) is provided at the upper end of the vertical wall 62c. Sliding contact part 627
Has a lever shape with one end fixed in the longitudinal direction and the other end being a free end, and a protrusion 627a protruding upward is provided near the free end of the sliding contact portion 627. When the sliding contact portion 627 is elastically deformed slightly downward, the protrusion 627 is
The a contacts the top plate 42 (FIG. 3) from below. Moving body 62
Along with the movement, the sliding contact portion 627 (the projection 627a thereof) and the lower surface of the top plate 42 (FIG. 3) are brought into sliding contact with each other, and the rattle is removed.

In front of the slide frame 32,
The first lens frame 19 holding the first lens 11R of the objective optical system is supported so as to be movable in the optical axis direction for adjusting the diopter difference, which will be described later.

FIG. 12 is a sectional view showing the internal structure of the binoculars 1. As shown in FIG. 12, the left and right prism holders 63 and 64 hold auxiliary prisms 12L and 12R and roof prisms 13L and 13R. In addition, the left and right lens holders 65 and 66 include the second lens 1 of the objective optical system.
4L, 14R, eyepieces 15L, 15R, and field rings 16L, 16R are held.

Arms 614 and 624 extend from the left and right moving bodies 61 and 62 toward the center of the binoculars in the width direction,
A focus adjustment drive mechanism 70 for driving the arms 614 and 624 in the optical axis direction is provided at the center of the binoculars in the width direction. The focus adjustment drive mechanism 70 is provided with a roller wheel 71 that is an operation member for focus adjustment, a drive ring 71a is fixed inside the roller wheel 71, and a drive ring 71a has two inner surfaces.
Two protrusions 76 and 77 are provided.

Further, the protrusion 7 is provided inside the drive ring 71a.
A screw 73 having a thread groove for engaging with 6, 77 is provided. A slider 74 is attached to the tip of the screw 73 to guide the screw 73 in the front-rear direction so that the screw 73 does not rotate about its axis.
4 moves straight ahead. Then, the arms 614 and 624 move back and forth via levers 75, which will be described later, provided on the slider 74, and move the moving bodies 61 and 62. The details of the focus adjustment drive mechanism 70 will be described later.

In the state shown in FIG. 12, the first lens 11
The L, 11R and the moving units 6a, 6b are in the closest state. In this state, the moving units 6a and 6b are housed in the exterior cases 51 and 52 of the binoculars 1 except for the rear ends thereof.

In FIG. 13, the moving units 6a and 6b are first
It shows a state in which the lenses are separated from the lenses 11L and 11R most. In the state shown in FIG. 13, the eyepieces 15L and 15R of the moving units 6a and 6b, the decorative rings 67 and 68, and the eyepiece rubbers 67a and 68a protrude rearward (toward the observer) from the exterior cases 51 and 52 of the binoculars 1. .

In the binoculars of the embodiment, as shown in FIG. 12, the moving units 6a and 6b are the first lenses 11L and 11B.
It cannot be observed in the state close to R (stored state). Thus, the moving units 6a and 6b including the eyepiece optical system
, The first lens 1 until it becomes unobservable (stored)
Since the binoculars 1 are configured so as to be close to the 1L and 11R, the binoculars 1 become smaller when not in use.

From the state shown in FIG. 12, the moving unit 6a,
When 6b is moved backward by a predetermined amount S1, an object at infinity (an object placed at infinity) comes into focus in myopia of -4 diopters. The mobile units 6a and 6b are
From the position where the object at infinity is in focus (in myopia of -4 diopters), the maximum predetermined amount S2 can be moved. In this range, at myopia of -4 diopters,
Objects at infinity and near are in focus. Mobile units 6a, 6 focusing on objects at infinity and short distances
The range of the position of b is set as the “observable range”. By moving and adjusting the moving units 6a and 6b within the observable range (S2), focus adjustment for a desired object is performed.

Here, in the binoculars of the embodiment, in the myopia of -4 diopters, the range of the positions of the moving units 6a and 6b in which an object at infinity or a near object is focused is set as an "observable range", so that it is lighter. Myopia (-4
In the case of ~ 0 diopter), emmetropia (0 diopter) or hyperopia, the moving units 6a and 6b are adjusted within the observable range (S2) to focus on an object at infinity and a short distance. be able to.

In this embodiment, the moving unit 6
The total stroke S of a and 6b is set to 11 mm, the moving stroke S1 from the stored state to the observable state is set to 7 mm, and the moving stroke S2 for focus adjustment in the observable range is set to 4 mm.

Next, the focus adjusting drive mechanism 70 will be described. FIG. 14 is a perspective view showing the focus adjustment drive mechanism 70. The screw 73 is pierced and supported by a support shaft 72 extending in the front-rear direction. The slider 74 provided at the tip of the screw 73 is provided with a corner portion 74a guided by a guide rail 45a provided inside the central support body 45,
By sliding the corner portion 74a and the guide rail 45a, the slider 74 (and the screw 73) can be moved straight forward and backward.

Slits 45b and 45b for inserting the arms 614 and 624 of the left and right moving bodies 61 and 62 from the left and right sides are formed on both side surfaces of the central support body 45. Further, a lever 75 extending downward is attached to the slider 74. The lever 75 engages from above with the grooves 615 and 625 of the arms 614 and 624 inserted into the central support body 45 through the slits 45b and 45b.

As described above, the left and right moving bodies 61 and 62 move in the front-rear direction due to the engagement of the lever 75 and the grooves 615 and 625 as the rolling wheel 71 rotates. It should be noted that the moving bodies 61 and 62 also move in the left-right direction along with the movement of the slide frames 31 and 32 due to the interpupillary adjustment.
25 is formed long enough to allow the movement of the moving bodies 61, 62 in the left-right direction.

15 and 16 are a side view of the screw 73 and a cross-sectional view of the rolling wheel 71. The screw 73 is a double thread, and the grooves 73a and 73b have large leads in the area A (corresponding to S1 in FIG. 12) corresponding to the accommodation / projection of the eyepiece, and the area B corresponding to the focus adjustment (see FIG. Equivalent to S2 of 12)
Is formed so that the leads are small. In this embodiment, the area A lead is 16 mm and the area B lead is 8 mm.
It is millimeter.

As shown in FIG. 16, a drive ring 71a provided inside the wheel 71 has conical pins 76 and 77 having an apex angle of 120 °. Pins 76,7
7 is a groove 73 of a screw 73 having a V-shaped cross section of 120 °.
a, 73b (FIG. 15). This makes pin 7
6 and 77 are regions A to B of the grooves 73a and 73b, respectively.
It can slide smoothly when moving to. In this way, by changing the lead of the thread groove, it is possible to change the movement amount of the moving bodies 61 and 62 with respect to the rotation amount of the rolling wheel 71. That is, the eyepiece can be quickly stored / projected, and the focus can be finely and accurately adjusted.

Next, the structure for supporting the moving body by the slide frame will be described. As shown in FIG. 9, in the slide frame 32, a portion to which the moving body 62 is attached is an opening 322. Then, the moving body 62 is supported by the portion other than the bottom of the moving body 62 (by the guide shaft 325 and the side wall portion 321). Therefore, as shown in FIG. 17 as a sectional view taken along line AA of the binoculars 1 of FIG.
62 can be attached to the slide frames 31 and 32 so that the bottoms 618 and 628 of the moving bodies 61 and 62 match the bottoms of the slide frames 31 and 32.

With this configuration, the size of the binoculars 1 in the thickness direction is equal to the thickness of the slide frames 31 and 32 as compared with the case where the moving bodies 61 and 62 are placed on the slide frames 31 and 32. Can be made smaller.
That is, the binoculars 1 can be made compact accordingly.

As described above, according to the binoculars of the present embodiment, both mirror bodies 21 and 22 slide symmetrically with respect to the center of the binoculars 1 in the width direction, so that they are arranged in the center of the binoculars 1 in the width direction. Roller 71 for focus adjustment is
The binoculars 1 are always located at the center in the width direction regardless of the change in the distance between the first and the second 22. Therefore, the wheel is easy to operate for both right-handed and left-handed observers.

Further, when the binoculars are not used, the moving units 6a and 6b including the eyepieces 15L and 15R can be brought close to the first lenses 11L and 11R 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. Further, since the accommodation / projection of the eyepiece and the focus adjustment are performed by the same mechanism (that is, the movement of the moving bodies 61 and 62 in the optical axis direction), the accommodation / projection of the eyepiece and the focus adjustment are performed. The configuration is simple as compared with the case of using separate drive mechanisms.

Next, a structure for adjusting the diopter difference will be described. The binoculars 1 of the embodiment are, as shown in FIG.
A disc-shaped diopter difference adjustment knob 90 is provided at the center of the lower surface of the binoculars 1 in the width direction. This diopter difference adjustment knob 90
It is configured to be rotated around an axis orthogonal to the optical axis. Further, in the binoculars 1 of the embodiment, by fixing the first lens 11L (FIG. 2) of the left objective optical system and moving the first lens 11R (FIG. 2) of the right objective optical system in the optical axis direction. , Is configured to perform diopter difference adjustment.

As shown in FIG. 10, the slide frame 3
In front of 2, the first lens holding the right first lens 11R
The lens frame 19 is attached. The first lens frame 19 is provided with an insertion hole 191 for inserting the guide shaft 325, and a projection 192 that comes into contact with the side wall portion 321 of the slide frame 32 from above.
It is movably supported in the front-back direction.

The first lens 11R on the right side is the central support 4
5 (not shown in FIG. 10) is moved by a blade member 81. Engagement grooves 81a extending in the width direction of the binoculars are formed on the blade member 81, and engage with two pins 193, 193 formed on the upper surface of the first lens frame 19. The pins 193 and 193 are arranged in the width direction of the binoculars, and the engagement between the pins 193 and 193 and the engagement groove 81a prevents the optical axis of the first lens 11R from being displaced.

FIG. 19 shows a driving mechanism 8 for adjusting the diopter difference for moving the blade member 81 by rotating the diopter adjusting knob 90.
It is the perspective view which looked at 0 from the lower part. Diopter difference adjustment knob 90
In order to convert the rotation of the above into the linear movement of the blade member 81, a drive pin 91 is erected on the upper part of the diopter difference adjustment knob 90 so as to be decentered by a predetermined amount with respect to the rotation center of the diopter difference adjustment knob 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 81.

FIG. 20 is a diagram showing the operation of the drive member 83 by the rotating operation of the diopter difference adjustment knob 90. Note that, in FIG. 20, 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 2
As shown in 0 (a), when the diopter difference adjustment knob 90 is set at the reference position, the drive pin 91 is arranged in the lateral direction (binocular width direction) with respect to the rotation center of the diopter difference adjustment knob 90. Is in a state.

When the diopter difference adjusting knob 90 is rotated clockwise from the state shown in FIG. 20 (a) as shown in FIG. 20 (b), the drive pin 91 is moved further than the center of rotation of the diopter difference adjusting knob 90. It moves forward and advances the drive member 83. That is, the blade member 81 is moved forward. Also, 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 81 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 saved.

Further, as shown in FIG. 21 as a partial sectional view of the binoculars 1, the surface of the diopter adjustment knob 90 coincides with the outer surface of the outer case 51 (52) and protrudes from the outer surface. Symbols such as "・", "+", "-" (Fig. 20) and knurls radially provided (Fig. 2)
0) only. With this configuration, the entire binoculars 1 are compact. Also, "・""+"
The symbol such as "-" and the grip between the knurling and the finger allow the diopter difference adjustment knob 90 to be easily rotated by the finger.

In the binoculars of the embodiment, in order to enable fine adjustment of the diopter difference before the factory shipment of the binoculars or after replacement of the parts, the binoculars in the optical axis direction of the drive member 83 and the blade member 81 in FIGS. The positional relationship of can be adjusted.

That is, as shown in FIG. 19, the blade member 81
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 81 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 45 as shown in FIG. 21, and the insertion hole 97 is inserted in the central support 45.
It is hidden by the makeup seal 98 on the front of the. Therefore, the space between the two mirror bodies 21, 22 is widened (FIG. 18), and the makeup seal 98
By peeling off and inserting the tool through the tool insertion hole 97, the screw 93 can be rotated and the diopter difference can be finely adjusted.

FIG. 22 shows changes in the positions of the drive member 83 and the blade member 81 due to the fine adjustment. When the tool is rotated clockwise, the screw 93 is screwed into the threaded portion of the drive member 81, so that the blade member 81 moves rearward with respect to the plate-shaped portion 95, as shown in FIG. Further, when the tool is rotated counterclockwise, the screw 93 is screwed into the screw portion of the drive member 81, so that as shown in FIG.
The blade member 81 moves forward with respect to the plate portion 95.
In this way, since the positional relationship between the blade member 83 and the driving member 81 can be adjusted from the outside of the binoculars 1, it is possible to perform adjustment to match the intermediate position “·” of the adjustment range by the diopter difference adjustment knob 90. .

Finally, the relationship between the features of the present invention and the embodiment will be described. The binoculars according to the embodiment include the auxiliary prisms 12L and 12R to the eyepieces 15L and 15R.
The focus adjustment is performed by moving the optical system up to (FIG. 12), and the diopter difference adjustment is performed by moving the first lens 11R (FIG. 10). In this way, by dividing the lens group that moves for focus adjustment and the lens group that moves for diopter difference adjustment, the lens groups are driven separately (focus adjustment drive mechanism 7).
0 and the diopter difference adjusting drive mechanism 80) can be used for driving, and the structure of the drive mechanism can be simplified. Moreover, since the structure of the drive mechanism is simplified, the amount of drive is reduced, and the positional accuracy of the lens group is improved.

[0075]

As described above, according to the binoculars of the present invention, by separating the lens group that moves left and right for focus adjustment and the lens group that moves for diopter difference adjustment. The drive mechanism for moving the lens group can be provided independently for focus adjustment and diopter difference adjustment. Therefore, the structure of the drive mechanism is simplified, the amount of drive is reduced, and the positional accuracy of the lens group is improved.

[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 slide frame and a bottom plate.

FIG. 5 is a perspective view showing a state where a slide frame is attached to a bottom plate.

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

FIG. 7 is a perspective view showing a mounting structure of an outer case to a slide frame.

FIG. 8 is a cross-sectional view showing a sliding operation of the left and right mirror bodies.

FIG. 9 is a perspective view showing a structure of a moving unit.

FIG. 10 is a perspective view showing a structure of a moving unit.

FIG. 11 is a perspective view showing a moving body.

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

FIG. 13 is a plan view showing the internal structure of binoculars.

FIG. 14 is an exploded perspective view showing an operation unit.

FIG. 15 is a plan view showing a screw.

FIG. 16 is a cross-sectional view showing a rolling wheel.

FIG. 17 is a cross-sectional view showing the internal structure of binoculars.

FIG. 18 is a perspective view showing a diopter adjustment knob.

FIG. 19 is a perspective view showing a diopter adjustment mechanism.

FIG. 20 is a schematic view showing the operation of the blade member by adjusting the diopter difference.

FIG. 21 is a partial cross-sectional view of binoculars.

FIG. 22 is a schematic diagram showing a method of finely adjusting the diopter difference.

[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 25 Support frame 31,32 slide 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 Focus adjustment drive mechanism 71 rolling wheels 73 screws 80 Diopter difference adjustment drive mechanism 81 blade member 90 Diopter difference adjustment knob 91 Drive pin

Claims (7)

(57) [Claims] 1. A focus adjusting means for performing focus adjustment by moving a predetermined lens group of the left and right telescopic optical systems, and a predetermined lens of either the left or right telescopic optical system other than the predetermined lens group. And a predetermined lens group of the left and right telephoto optical systems and the predetermined lens.
The right or left telescopic optical system other than the lens group
One of the lenses is either the eyepiece optical system or the objective optical system.
Binoculars characterized by including one of them and an erecting optical system . 2. The predetermined lens group of the left and right telescopic optical systems belongs to an eyepiece optical system, and the predetermined lens of one of the left and right telescopic optical systems belongs to an objective optical system,
The binoculars according to claim 1, wherein: 3. The binoculars according to claim 2, wherein the predetermined lens group belonging to the eyepiece optical system is all the lenses belonging to the eyepiece optical system. 4. The binoculars according to claim 3, wherein the predetermined lens belonging to the objective optical system is a lens located at the frontmost position in the objective optical system. 5. The binoculars according to claim 4, wherein the focus adjusting means further moves, together with the eyepiece optical system, lenses other than the frontmost lens of the objective optical system. 6. The binoculars according to claim 4, wherein the focus adjusting means further moves an erecting optical system together with the eyepiece optical system. 7. The size of the unused binoculars in the optical axis direction is reduced by bringing the eyepiece optical system closer to the frontmost lens of the objective optical system until it becomes unobservable. , The binoculars according to any one of claims 3 to 6.