JP3569423B2 - binoculars - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to binoculars, and more particularly, to binoculars having an interpupillary distance adjusting mechanism that adjusts the distance between left and right eyepieces in accordance with the interpupillary distance of an observer.
[0002]
[Prior art]
Conventionally, in order to adjust the distance between the left and right eyepieces according to the distance between the left and right eyes of the observer (ie, the interpupillary distance), the left and right telephoto optical systems are housed in a pair of left and right casings, respectively. Binoculars are known in which one (eg, left) casing is configured to be horizontally movable in the width direction of the binocular with respect to the other (eg, right) casing.
[0003]
[Problems to be solved by the invention]
In such binoculars, a stopper (a member that regulates a moving range) that defines the state in which the left and right telephoto optical systems are closest to each other and the state in which they are farthest apart is necessary. There is a problem that the space increases and hinders downsizing of the binoculars.
[0004]
The present invention has been made in view of the above circumstances, and has as its object to provide a pair of binoculars capable of controlling the movement range of the left and right telephoto optical systems associated with the interpupillary distance adjusting mechanism in a small space.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the binoculars of the present invention include a pair of left and right movable frames that support the left and right telephoto optical systems, and a support frame that supports the pair of movable frames so as to be movable in the width direction of the binoculars, A rack gear extending in the width direction of the binoculars is provided on each movable frame, and by engaging both rack gears with one pinion while facing each other, the pair of movable frames can be symmetrically movable with respect to the pinion, and the binoculars A groove extending in the width direction is provided in each movable frame, and a pin formed on the support frame is engaged with the groove, thereby regulating a range of movement of the pair of movable frames in the binoculars width direction, and a pinion shaft and a pin, The binoculars are arranged in series in the front-rear direction of the binoculars at the center in the width direction of the binoculars.
[0006]
As described above, the pinion for moving the left and right movable frames symmetrically and the pin for regulating the moving range of the movable frame are arranged in series at the center of the binoculars in the width direction, so that a small space can be used for adjusting eyewear. It is possible to regulate the moving range of the left and right telephoto optical systems.
[0007]
Further, the groove formed on one of the pair of movable frames may be configured to overlap with the groove formed on the other in the up-down direction of the binoculars and engage with a common pin. With this configuration, the space occupied by the binoculars in the width direction can be reduced accordingly.
[0008]
Further, each movable frame may be configured to have at least one of the grooves in front of and behind the pinion. With this configuration, it is possible to further reduce the play of the engagement between the groove and the pin. The above-mentioned support frame may be constituted by a top plate and a bottom plate which slidably support the pair of movable frames by sandwiching the pair of movable frames from above and below, and pins may be provided on the bottom plate.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described.
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 operation member for focus adjustment 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.
[0010]
FIG. 1 is a perspective view showing the binoculars 1 of the present embodiment. The binoculars 1 are provided with a pair of left and right mirrors (casings) 21 and 22 that can be moved symmetrically with respect to the center in the width direction of the binoculars, and a support frame 25 that supports both mirrors.
[0011]
FIG. 2 is a diagram illustrating 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, a pair of left and right telephoto optical systems 10 </ b> L and 10 </ b> R are accommodated in left and right mirror bodies 21 and 22 of the binoculars 1. Each of the telephoto optical systems 10L and 10R includes first lenses 11L and 11R, auxiliary prisms 12L and 12R, roof prisms 13L and 13R, and second lenses 14L and 14R along incident optical axes OAL and OAR indicated by alternate long and short dash lines in the drawing. And eyepieces 15L and 15R.
[0012]
The first lenses 11L and 11R and the second lenses 14L and 14R each form an objective optical system, and field frames 16L and 16R are provided at positions where images are formed by the objective optical system. The image formed by the objective optical system is enlarged and observed by the eyepieces 15L and 15R.
[0013]
Next, a configuration for enabling the pair of right and left mirror bodies 21 and 22 shown in FIG. 1 to be symmetrically movable with respect to the center in the width direction of the binoculars will be described. In the following description, the objective side (the side closer to the subject) of the binoculars 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 “optical axis direction”.
[0014]
FIG. 3 is an exploded perspective view showing a frame structure of the binoculars 1. A support frame 25 (FIG. 1) for movably supporting the pair of right and left mirror bodies 21 and 22 is provided between the bottom plate 41 and the top plate 42, which are two parallel plate members, and between the bottom plate 41 and the top plate 42. Is formed as a horizontal H-shaped frame by a central support 45 which is provided in the height direction of the binoculars.
[0015]
The lenses and prisms of the left and right telephoto optical systems 10L and 10R (FIG. 2) (optical axes OAL and OAR in FIG. 3, respectively) are provided movably in the binocular width direction between the bottom plate 41 and the top plate 42. It is supported by a pair of left and right slide frames 31, 32. Further, a pair of left and right exterior cases 51 and 52, which are parts to be gripped by the observer, are fixed to the slide frames 31 and 32. The left and right slide frames 31, 32 and the outer cases 51, 52 constitute the mirror bodies 21, 22 of FIG.
[0016]
FIG. 4 is a perspective view showing left and right slide frames 31 and 32 and a bottom plate 41 supporting both slide frames. The slide frames 31 and 32 are a pair of left and right plate-like members having openings 312 and 322 formed in the center, respectively. The ends corresponding to the left and right ends of the binoculars of the slide frames 31 and 32 are bent vertically upward to form the side walls 311 and 321.
[0017]
At a front end and a rear end of the slide frame 31, a pair of upright portions 313 and 314 that stand upright in the vertical direction are formed at positions at a predetermined distance from the side wall portion 311. 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, 324 are formed at the front end and the rear end of the holding portion 320 of the slide frame 32, and between the side wall portion 321 and the upright portions 323, 324, the right telephoto optical system 10R (FIG. 2). Is held.
[0018]
A guide shaft 315 extending in the front-rear direction extends between the upright portions 313, 314 of the slide frame 31, and a guide shaft 325 extending in the front-rear direction extends between the upright portions 323, 324 of the slide frame 32. Has been passed over. The two guide shafts 315 and 325 provide guidance when the eyepiece optical system and the prism are moved in the front-rear direction (details will be described later).
[0019]
Guide grooves 310a and 310b extending in the width direction of the binoculars are formed near the front end and the rear end of the slide frame 31, 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 slide frame 32, respectively.
[0020]
Four pins 413, 414, 415, and 416 are planted at four corners of the bottom plate 41, and engage with the guide grooves 310a and 310b of the slide frame 31 and the guide grooves 320a and 320b of the slide frame 32, respectively. By the engagement of the guide grooves 310a, 310b, 320a, 320b and the pins 413, 414, 415, 416, the position of the slide frames 31, 32 is restricted on the bottom plate 41 so as to be movable only in the binoculars width direction.
[0021]
From the right end of the slide frame 31, a pair of extending portions 331 and 332 parallel to the slide frame 32 extend, and from the left end of the slide frame 32, a pair of extending portions 341 and 341 toward the slide frame 31. 342 is extended.
Engaging grooves 333 and 334 extending in the width direction of the binoculars are respectively 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.
[0022]
FIG. 5 shows a state where the slide frames 31 and 32 are attached to the bottom plate 41. When the slide frames 31 and 32 are attached to the bottom plate 41, the extension portions 331 and 332 of the slide frame 31 and the extension portions 341 and 342 of the slide frame 32 are arranged so as to overlap with the slide frame 32 side up. You.
[0023]
The pin 411 planted at the center of the bottom plate 41 in the width direction of the binoculars is engaged with the engagement groove 333 of the slide frame 31 and the engagement groove 343 of the slide frame 32, and the engagement groove 334 of the slide frame 31 and the slide frame are engaged. A pin 412 planted at the center of the bottom plate 41 in the width direction of the binoculars is engaged with the engagement groove 344 of the 32. The slide frames 31, 32 are guided in the width direction of the binoculars by the engagement between the pins 411, 412 and the respective engagement grooves.
[0024]
The center support 45 is disposed at the center in the width direction of the bottom plate 41 so as to straddle each extension of the slide frames 31 and 32. Racks 335 and 345 are formed facing each other on the extension 331 of the slide frame 31 and the extension 342 of the slide frame 32, and both racks 335 and 345 are provided below the central support 45. The pinion 36 is engaged.
[0025]
3, upper end surfaces 313a and 314a of upright portions 313 and 314 of the slide frame 31 and upper end surfaces 323a and 324a of the upright portions 323 and 324 of the slide frame 32 contact the lower surface of the top plate 42. The contact surface is in contact. As described above, the positions of the slide frames 31 and 32 are regulated in the vertical direction by the bottom plate 41 and the top plate 42.
Thus, the slide frames 31 and 32 are slidably supported in the width direction of the binoculars by the horizontal H-shaped support frame 25 including the bottom plate 41, the top plate 42, and the center support 45.
[0026]
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, 32 are slidable only in the binoculars width direction by engagement of the pins 413, 414, 415, 416 implanted in the bottom plate 41 with the guide grooves 310a, 310b, 320a, 320b. I have. Further, since the pinion 36 is engaged with the racks 335 and 345 of the slide frames 31 and 32, as shown in FIGS. 6A and 6B, the slide frames 31 and 32 are Only moveable.
[0027]
Next, the mounting structure of the slide frame and the outer case will be described.
FIG. 7 is a perspective view showing an attachment 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.
[0028]
The outer case 52 is formed in a box shape that opens inward 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 optical system is formed. On the other hand, the entire rear end of the outer case 52 is an opening, and an outer edge 523 for attaching the rear end cover 529 is formed on the inner periphery of the opening in the binoculars width direction.
[0029]
Of the pair of upright portions 323 and 324 of the slide frame 32, a forward upright portion 323 is formed with a contact portion 346 that projects horizontally forward and contacts the wall 521 of the outer case 52. The upright portion 324 on the eyepiece side is bent rearward, and upper and lower ends of the bent portion are abutting portions 347 that abut against the outer edge portion 523 of the outer case 52.
[0030]
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. A screw hole 324a is formed in the upright portion 324, and a through hole 526 is formed in a position corresponding to the screw hole 324a in a rear end cover 529 that is fitted into the outer edge portion 523 of the outer case 52. 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.
[0031]
As described above, the slide frame 32 and the outer case 52 are fixed by the contact between the contact portions 346 and 347 and the wall 521 and the outer edge portion 523, and by tightening the screws to the screw holes 348, 324a, and 349. That is, since the bottom plate 41 and the top plate 42 are positioned above and below the slide frame 32, the slide frame 32 and the outer case 52 are fixed at locations other than the top and bottom of the slide frame 32, that is, at the front and rear ends and side ends. . The left mirror 21 and the slide frame 31 are fixed in the same manner.
[0032]
With such a configuration, the right and left mirror bodies 21 and 22 formed by the slide frames 31 and 32 and the outer cases 51 and 52 are supported by the horizontal H-shaped support frame 25, and FIG. As shown in a schematic cross-sectional view in FIG.
[0033]
In the binoculars of the present embodiment, the left and right mirror bodies (casings) 21 and 22 including the slide frames 31 and 32 and the outer cases 51 and 52 constitute boxes (shells), respectively, so that a highly rigid structure is obtained. . In order to further increase the rigidity of the left and right mirror bodies 21 and 22, the slide frames 31, 32 and the outer cases 51, 52 are made of metal.
[0034]
Further, since the left and right mirror bodies 21 and 22 are supported by the horizontal H-shaped support frame 25 composed of the bottom plate 41, the top plate 42, and the center support body 45, the left and right mirrors as shown in FIG. Even when the distance between the bodies 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.
[0035]
Next, a configuration for holding the optical system in the left and right mirrors will be described.
In the binoculars of the present embodiment, of the left and right telephoto optical systems 10L and 10R shown in FIG. 2, a portion from the auxiliary prisms 12L and 12R to the eyepieces 15L and 15R is a movable unit, and the unit is an optical axis. By moving along the OAL and OAR, the eyepiece is stored / projected and the focus is adjusted.
[0036]
Therefore, the slide frames 31 and 32 shown in FIG. 3 are provided with a pair of left and right moving units 6a and 6b (omitted in FIG. 3) which hold the prisms and lenses and can move along the optical axis. 9 and 10 are an exploded perspective view and a plan view showing the right moving unit 6b. The left moving unit 6a is symmetrical to the right moving unit 6b with respect to the center in the binoculars width direction.
[0037]
As shown in FIG. 9, the right moving unit 6b includes a prism holder 64 for holding a prism (to be described later), a lens holder 66 for holding a lens (to be described later), and a moving body 62 for supporting these. . A makeup ring 68, which is an exterior member of the eyepiece, is attached to the tip of the lens holder 66, and an eyepiece rubber 68a is provided at the tip of the makeup ring 68.
[0038]
The moving body 62 includes a base plate 62a on which the prism holder 64 is mounted, 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 plan view, and a lens holder 66 is attached to the vertical wall 62b from behind.
[0039]
Insertion holes 621 and 622 for inserting the guide shaft 325 of the slide frame 32 are formed in the vertical wall 62c, and a contact portion 623 that contacts the side wall portion 321 of the slide frame 32 from above at the right end of the vertical wall 62b. Is provided. 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.
[0040]
Here, as shown in FIG. 11 as a perspective view of the moving body 62 viewed from the right rear, the right end of the base plate 62a of the moving body 62 is upwardly contacted with the side wall 321 of the slide frame 32 from below. An abutment piece 626 bent toward the front is provided. When the moving body 62 is attached to the slide frame 32, the contact piece 626 comes into contact with the lower side of the side wall portion 321 while being slightly elastically deformed. 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. Thereby, the rotation of the moving body 62 around the guide shaft 325 is prevented.
[0041]
In addition, in order to remove play due to clearance between the guide shaft 325 and the insertion holes 621 and 622 (FIG. 9), a sliding contact portion 627 that slides on the top plate 42 (FIG. 3) is provided at the upper end of the vertical wall 62c. Is provided. The sliding contact portion 627 is formed in a lever shape in which one end in the longitudinal direction is fixed and the other end is a free end, and a protrusion 627a protruding upward is provided near the free end of the sliding contact portion 627. With the sliding portion 627 slightly elastically deformed downward, the projection 627a contacts the top plate 42 (FIG. 3) from below. Along with the movement of the moving body 62, (the protrusion 627a of) the sliding contact portion 627 and the lower surface of the top plate 42 (FIG. 3) are in sliding contact, and the above play is removed.
[0042]
A first lens frame 19 for holding the first lens 11R of the objective optical system is supported in front of the slide frame 32 so as to be movable in the optical axis direction for adjusting diopter difference. It will be described later.
[0043]
FIG. 12 is a cross-sectional view illustrating an internal configuration 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. The left and right lens holders 65 and 66 hold the second lenses 14L and 14R of the objective optical system, the eyepieces 15L and 15R, and the field rings 16L and 16R.
[0044]
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, and are provided at the center of the binoculars in the width direction for focus adjustment for driving the arms 614 and 624 in the optical axis direction. A drive mechanism 70 is provided. The focus adjustment drive mechanism 70 is provided with a wheel 71 serving as a focus adjustment operation member. A drive ring 71a is fixed inside the wheel 71, and two projections 76 are provided on the inner surface of the drive ring 71a. 77 are provided.
[0045]
Further, a screw 73 having a screw groove that engages with the projections 76 and 77 is provided inside the drive ring 71a. A slider 74 that guides the screw 73 in the front-rear direction so that the screw 73 does not rotate around the axis is attached to the tip of the screw 73. When the wheel 71 is rotated, the screw 73 and the slider 74 move straight. Then, the arms 614 and 624 move back and forth via a lever 75 described later provided on the slider 74 to move the moving bodies 61 and 62. The details of the focus adjustment driving mechanism 70 will be described later.
[0046]
In the state shown in FIG. 12, the first lenses 11L and 11R and the moving units 6a and 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.
[0047]
FIG. 13 shows a state where the moving units 6a and 6b are farthest from the first lenses 11L and 11R. In the state shown in FIG. 13, the eyepieces 15L and 15R, the makeup rings 67 and 68, and the eyepiece rubbers 67a and 68a of the moving units 6a and 6b protrude rearward (observer side) from the exterior cases 51 and 52 of the binoculars 1. .
[0048]
As shown in FIG. 12, the binoculars of the embodiment cannot be observed in a state where the moving units 6a and 6b are closest to the first lenses 11L and 11R (a housed state). As described above, since the moving units 6a and 6b including the eyepiece optical system are configured so as to be able to approach the first lenses 11L and 11R until the observation is impossible (storage state), the binoculars 1 are only used when not in use. Become smaller.
[0049]
In a state in which the mobile units 6a and 6b are moved backward by the predetermined amount S1 from the state shown in FIG. 12, an object at infinity (an object placed at infinity) is focused in myopia of -4 diopters. The moving units 6a and 6b can move up to a predetermined amount S2 from the position where the object at infinity is focused (in myopia of -4 diopters). In this range, an object at infinity and a short distance is in focus at −4 diopter myopia.
The range of the positions of the mobile units 6a and 6b at which the objects at infinity and short distance are focused is referred to as “observable range”. By moving and adjusting the moving units 6a and 6b within this observable range (S2), focus adjustment for a desired object is performed.
[0050]
Here, in the binoculars of the embodiment, since the range of the positions of the moving units 6a and 6b at which the object at infinity or the short-distance object is focused in the myopia of -4 diopters is set as the "observable range", the myopia becomes lighter (-). In the case of 4-0 diopter), emmetropia (0 diopter), or farsightedness, the focus is set on an object at infinity and a short distance by adjusting the moving units 6a and 6b within the observable range (S2). Can be matched.
[0051]
In the present embodiment, the total stroke S of the moving units 6a and 6b is set to 11 mm, the moving stroke S1 from the stored state to the observable state is 7 mm, and the moving stroke S2 for focus adjustment in the observable range. Is set to 4 mm.
[0052]
Next, the focus adjustment driving mechanism 70 will be described. FIG. 14 is a perspective view showing the focus adjustment drive mechanism 70. The screw 73 is supported by a support shaft 72 extending in the front-rear direction. The slider 74 provided at the tip of the screw 73 has a corner portion 74a guided by a guide rail 45a provided inside the central support 45, and slides between the corner portion 74a and the guide rail 45a. The slider 74 (and the screw 73) can move straight in the front-rear direction.
[0053]
On both sides of the central support 45, slits 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. Further, a lever 75 extending downward is attached to the slider 74. The lever 75 is engaged with the grooves 615 and 625 of the arms 614 and 624 inserted from the slits 45b and 45b into the center support 45 from above.
[0054]
In this manner, the left and right moving bodies 61 and 62 move in the front-rear direction by the engagement of the lever 75 and the grooves 615 and 625 with the rotation of the rolling wheel 71. Since the moving bodies 61 and 62 also move in the left-right direction as the slide frames 31 and 32 move due to the interpupillary adjustment, the grooves 615 and 625 are long enough to allow the moving bodies 61 and 62 to move in the left-right direction. Is formed.
[0055]
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 an area A (corresponding to S1 in FIG. 12) corresponding to the storage / projection of the eyepiece, and an area B corresponding to focus adjustment (see FIG. 12). 12 (corresponding to S2), the lead is formed to be small. In this embodiment, the lead in the area A is 16 mm, and the lead in the area B is 8 mm.
[0056]
As shown in FIG. 16, conical pins 76 and 77 having a vertex angle of 120 ° are formed on a drive ring 71 a provided inside the rolling wheel 71. The pins 76, 77 engage in grooves 73a, 73b (FIG. 15) of a screw 73 having a 120 ° V-shaped cross section. Accordingly, when the pins 76 and 77 move from the area A of the grooves 73a and 73b to the area B, respectively, they can slide smoothly. Thus, by changing the lead of the thread groove, the amount of movement of the moving bodies 61 and 62 with respect to the amount of rotation of the rolling wheel 71 can be changed. That is, the eyepiece can be quickly stored / projected, and the focus can be finely and accurately adjusted.
[0057]
Next, the support structure of the moving body by the slide frame will be described. As shown in FIG. 9, in the slide frame 32, a portion where the moving body 62 is attached is an opening 322. The moving body 62 is supported at a portion other than the bottom of the moving body 62 (by the guide shaft 325 and the side wall 321). Therefore, as shown in FIG. 17 as an AA cross-sectional view of the binoculars 1 in FIG. 12, the moving bodies 61 and 62 have the bottoms 618 and 628 of the moving bodies 61 and 62 coincide with the bottoms of the slide frames 31 and 32. Then, it can be attached to the slide frames 31 and 32.
[0058]
With this configuration, the size of the binoculars 1 in the thickness direction can be reduced by 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. That is, the binoculars 1 can be made compact accordingly.
[0059]
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 in the width direction of the binoculars 1, the focus adjustment disposed at the center in the width direction of the binoculars 1. Wheel 71 is always located at the center in the width direction of binoculars 1 irrespective of a change in the interval between both mirror bodies 21 and 22. Therefore, the wheel can be easily operated by both right-handed and left-handed observers.
[0060]
In addition, when the binoculars are not used, the moving units 6a and 6b including the eyepieces 15L and 15R can be brought closer to the first lenses 11L and 11R until the observation units become incapable of observation. That is, the size of the binoculars when not in use in the optical axis direction can be reduced accordingly, and portability is improved. Further, since the storage / projection of the eyepiece and the focus adjustment are performed by the same mechanism (that is, the movement of the movable bodies 61 and 62 in the optical axis direction), the storage / projection of the eyepiece and the focus adjustment are performed. The configuration is simpler than in the case of using different drive mechanisms.
[0061]
Next, a configuration for adjusting diopter difference will be described.
As shown in FIG. 18, the binoculars 1 of the embodiment include a disc-shaped diopter adjustment knob 90 at the center in the width direction on the lower surface of the binoculars 1. The diopter adjustment knob 90 is configured to be rotated around an axis orthogonal to the optical axis.
Further, the binoculars 1 of the embodiment fixes the first lens 11L of the left objective optical system (FIG. 2) and moves the first lens 11R of the right objective optical system (FIG. 2) in the optical axis direction. , For adjusting diopter difference.
[0062]
As shown in FIG. 10, a first lens frame 19 that holds the right first lens 11R is attached to the front of the slide frame 32. The first lens frame 19 is provided with an insertion hole 191 through which the guide shaft 325 is inserted, and a projection 192 that comes into contact with the side wall 321 of the slide frame 32 from above, so that the slide frame 32 can be moved in the front-rear direction. Supported.
[0063]
The first lens 11R on the right side is moved by a blade member 81 provided on the central support 45 (omitted in FIG. 10). An engaging groove 81 a extending in the width direction of the binoculars is formed in the wing member 81, and engages with two pins 193 and 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 displacement of the optical axis of the first lens 11R is prevented by the engagement between the pins 193 and 193 and the engagement groove 81a.
[0064]
FIG. 19 is a perspective view of the diopter difference adjusting drive mechanism 80 that moves the blade member 81 by rotating the diopter difference adjusting knob 90 as viewed from below. In order to convert the rotation of the diopter adjustment knob 90 into a linear motion of the blade member 81, a drive pin 91 is provided above the diopter adjustment knob 90 eccentrically with respect to the rotation center of the diopter adjustment knob 90 by a predetermined amount. It is erected. 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 81.
[0065]
FIG. 20 is a diagram illustrating the operation of the drive member 83 by the rotation operation of the diopter difference adjustment knob 90. 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 easy understanding. As shown in FIG. 20A, when the diopter difference adjustment knob 90 is set at the 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. They are lined up.
[0066]
When the diopter adjustment knob 90 is rotated clockwise from the state of FIG. 20A as shown in FIG. 20B, the drive pin 91 moves forward from the center of rotation of the diopter adjustment knob 90. Then, the driving member 83 is advanced. That is, the blade member 81 is moved forward. When the diopter adjustment knob 90 is rotated counterclockwise as shown in FIG. 20C, the drive pin 91 moves backward from the rotation center of the diopter difference adjustment knob 90, and the driving member 83 is driven. Retreat. That is, the blade member 81 is moved backward.
[0067]
As described above, since the diopter adjustment knob 90 can be rotatably provided around an axis orthogonal to the optical axis, the diopter adjustment knob 90 can be provided on the lower surface of the binoculars 1 as shown in FIG. Will be possible. Thereby, there is an effect that the operation is simple and the space is not taken up.
[0068]
Further, as shown in FIG. 21 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 projects from the outer surface. Only symbols such as “•”, “+” and “−” (FIG. 20) and knurls provided radially (FIG. 20) are provided. With such a configuration, the entire binoculars 1 becomes compact. Further, the diopter difference adjustment knob 90 can be easily rotated with a finger by means of symbols such as “•”, “+”, and “−” and a grip between the knurl and the finger.
[0069]
In the binoculars of the embodiment, the positional relationship between the driving member 83 and the blade member 81 in FIGS. 19 and 20 in the optical axis direction in order to enable fine adjustment of the diopter difference before shipment of the binoculars or after component replacement. Is adjustable.
[0070]
That is, as shown in FIG. 19, the blade member 81 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 periphery. That is, when the screw 93 is tightened or loosened, the relative position of the blade member 81 with respect to the driving member 83 in the optical axis direction can be finely adjusted.
[0071]
In order to insert a tool for operating the screw 93, a tool insertion hole 97 is formed in the center support 45 as shown in FIG. 21, and the insertion hole 97 is a decorative seal 98 on the front surface of the center support 45. Hiding in For this reason, the distance between the two mirror bodies 21 and 22 is widened (FIG. 18), 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.
[0072]
FIG. 22 shows a change in the position of the driving 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-like portion 95 as shown in FIG. When the tool is rotated counterclockwise, the screw 93 is screwed into the threaded portion of the driving member 81, so that the blade member 81 is moved forward with respect to the plate-like portion 95 as shown in FIG. Moving. As described above, since the positional relationship between the blade member 83 and the driving member 81 can be adjusted from outside the binoculars 1, it is possible to perform adjustment for adjusting the intermediate position “•” of the adjustment range using the diopter difference adjustment knob 90. .
[0073]
Finally, the relationship between the features of the present invention and the embodiment will be described.
As shown in FIG. 4, engaging portions 333 and 334 extending in the width direction of the binoculars are formed in the extending portions 331 and 332 of the slide frame 31 and the extending portions 341 and 342 of the slide frame 32, respectively. Engagement grooves 343 and 344 are formed in 341 and 342, respectively. Further, racks 335 and 345 are formed on the extension portion 331 and the extension portion 342 so as to face each other.
[0074]
As shown in FIG. 5, when the slide frames 31 and 32 are attached to the bottom plate 41, the engagement groove 333 of the slide frame 31 and the engagement groove 343 of the slide frame 32 are implanted at the center of the bottom plate 41 in the binocular width direction. The pin 411 provided at the center of the bottom plate 41 in the width direction of the binoculars is engaged with the engagement groove 334 of the slide frame 31 and the engagement groove 344 of the slide frame 32. . The racks 335 and 345 formed on the extension 331 and the extension 342 are engaged with the pinion 36.
[0075]
As shown in FIG. 6, the center axis of the pinion 36 and the pins 411 and 412 are arranged in series in the front-back direction of the binoculars. The engagement between the pinion 36 and the racks 335, 345 allows the slide frames 31, 32 to move by the same amount in opposite directions. Also, as shown in FIGS. 6A and 6B, the engagement of the pin 411 with the engagement grooves 333 and 343 and the engagement of the pin 412 with the engagement grooves 334 and 344 cause the slide frame 31, 32 movement ranges are regulated.
With this configuration, the movement range of the slide frames 31, 32 can be restricted with a small space.
[0076]
【The invention's effect】
As described above, according to the binoculars of the present invention, a pinion for moving the left and right movable frames symmetrically, and a pin for regulating the moving range of the movable frames, are arranged in series at the center of the binoculars width direction, With a small space, it is possible to regulate the moving range of the telephoto optical system accompanying the eyewear adjustment.
[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 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 structure for attaching an outer case to a slide frame.
FIG. 8 is a cross-sectional view showing a sliding operation of right and left mirror bodies.
FIG. 9 is a perspective view showing the structure of the 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 the binoculars.
FIG. 13 is a plan view showing the internal structure of the 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 sectional view showing a rolling wheel.
FIG. 17 is a sectional view showing the internal structure of the 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 a blade member by adjusting diopter difference.
FIG. 21 is a partial cross-sectional view of binoculars.
FIG. 22 is a schematic diagram illustrating a fine adjustment method of a diopter difference.
[Explanation of symbols]
1 binoculars
11L, 11R First lens
12L, 12R auxiliary prism
13L, 13R roof prism
14L, 14R Second 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 pin
42 top plate
45 Central support
51,52 Outer case
61,62 Moving body
614,624 arm
70 Focus Adjustment Drive Mechanism
71 Wheel
73 screw
80 Drive mechanism for diopter adjustment
81 blade member
90 Diopter adjustment knob
91 Drive pin

Claims (4)

A pair of left and right movable frames that support the left and right telephoto optical systems, and a support frame that supports the pair of left and right movable frames so as to be movable in the width direction of the binoculars,
A rack gear extending in the width direction of the binoculars is provided on each movable frame, and the pair of movable frames can be symmetrically moved with respect to the pinion by engaging the rack gears with one pinion while facing each other. age,
A groove extending in the width direction of the binoculars is provided in each movable frame, and a pin formed on the support frame is engaged with the groove, thereby restricting a range of movement of the pair of movable frames in the binoculars width direction,
The center axis of the pinion and the pin are arranged in series in the front-rear direction of the binoculars at the center in the width direction of the binoculars,
The groove formed on one of the pair of movable frames overlaps with the groove formed on the other in the vertical direction of the binoculars, and engages with a common pin. A pair of left and right movable frames that support the left and right telephoto optical systems, and a support frame that supports the pair of left and right movable frames so as to be movable in the width direction of the binoculars,
A rack gear extending in the width direction of the binoculars is provided on each movable frame, and the rack gears are engaged with one pinion in a state where the rack gears are opposed to each other to thereby form the pair of movable frames. Moveable symmetrically with respect to the pinion,
A groove extending in the width direction of the binoculars is provided in each movable frame, and a pin formed on the support frame is engaged with the groove, thereby restricting a range of movement of the pair of movable frames in the binoculars width direction,
The center axis of the pinion and the pin are arranged in series in the front-rear direction of the binoculars at the center in the width direction of the binoculars,
A pair of binoculars, wherein each of the movable frames has at least one groove in front of and behind the pinion. A pair of left and right movable frames that support the left and right telephoto optical systems, and a support frame that supports the pair of left and right movable frames so as to be movable in the width direction of the binoculars,
A rack gear extending in the width direction of the binoculars is provided on each movable frame, and the rack gears are engaged with one pinion in a state where the rack gears are opposed to each other to thereby form the pair of movable frames. Moveable symmetrically with respect to the pinion,
A groove extending in the width direction of the binoculars is provided in each movable frame, and a pin formed on the support frame is engaged with the groove, thereby restricting a range of movement of the pair of movable frames in the binoculars width direction,
The center axis of the pinion and the pin are arranged in series in the front-rear direction of the binoculars at the center in the width direction of the binoculars,
A pair of binoculars, wherein the support frame includes a top plate and a bottom plate that slidably support the pair of movable frames by sandwiching the pair of movable frames from above and below, and the pins protrude from the bottom plate. Each of the movable frames has at least one extension extending toward the opposing movable frame, and the groove and the rack gear are formed in the extension. The binoculars according to any one of 1 to 3.

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