WO2015194409A1 - レンズ鏡筒及びルーペ - Google Patents
レンズ鏡筒及びルーペ Download PDFInfo
- Publication number
- WO2015194409A1 WO2015194409A1 PCT/JP2015/066444 JP2015066444W WO2015194409A1 WO 2015194409 A1 WO2015194409 A1 WO 2015194409A1 JP 2015066444 W JP2015066444 W JP 2015066444W WO 2015194409 A1 WO2015194409 A1 WO 2015194409A1
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- WO
- WIPO (PCT)
- Prior art keywords
- adjustment member
- lens barrel
- spiral groove
- cylinder
- groove
- Prior art date
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/002—Magnifying glasses
- G02B25/005—Magnifying glasses with means for adjusting the magnifying glass or the object viewed
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/002—Magnifying glasses
- G02B25/004—Magnifying glasses having binocular arrangement
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/002—Magnifying glasses
- G02B25/008—Magnifying glasses comprising two or more lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
Definitions
- the present invention relates to a lens barrel, and more particularly, to a lens barrel that holds a plurality of optical systems and a loupe using the same.
- a spectacle-type loupe that is worn by a surgeon or dentist (physician or the like) to enlarge an affected area on which surgery is performed is known.
- a distance working distance
- a loupe capable of adjusting such a working distance is disclosed in Patent Document 1.
- Patent Document 1 A specific working distance adjustment method in Patent Document 1 will be described.
- the rotating cylinder holding the objective lens is screwed around the optical axis with the fixed cylinder holding the other lenses including the eyepiece.
- the distance between the axes of the objective lens and the other lenses is changed according to the phase angle of the rotating cylinder with respect to the fixed cylinder, thereby adjusting the working distance.
- the working distance of the loupe is unique to doctors and the like, once the adjustment is decided, it is hardly changed after that. It is generally done to fix.
- the rotating cylinder and the fixed cylinder if the working distance is adjusted by mistake, the rotating cylinder and the fixed cylinder cannot be separated, and these must be discarded, resulting in poor yield.
- the method of fixing the rotating cylinder and the fixed cylinder using separate fixing members that fix the rotating cylinder and the fixed cylinder from the outside the number of parts is increased and the fixing member is attached to the rotating cylinder and the fixed cylinder. It is necessary to provide a space for attaching the magnifying glass. Further, the attachment of the fixing member causes an increase in the size and weight of the loupe, which is not preferable.
- the present invention aims to solve the above-described problems, and provides a lens barrel capable of arbitrarily adjusting a working distance while having a lightweight, simple and small configuration, and a loupe using the lens barrel. With the goal.
- a lens barrel reflecting one aspect of the present invention is: A rotary cylinder having an adjustment member that holds the first optical system and can protrude from the inner peripheral surface; A lens barrel that holds a second optical system and has a fixed cylinder provided on an outer peripheral surface with a spiral groove that engages with the adjustment member, The adjustment member can take a first position and a second position with respect to the spiral groove, and at any position of the first position or the second position, a part of the adjustment member is In the spiral groove, When the adjustment member is in the first position, the adjustment member is slidable along the spiral groove, so that the rotary cylinder rotates relative to the fixed cylinder. And When the adjustment member is in the second position, the adjustment member is in contact with the spiral groove, thereby preventing rotation of the rotary cylinder relative to the fixed cylinder.
- the adjustment member and the spiral groove are slidable, so that they are guided to the spiral groove via the adjustment member.
- the distance between the axes of the first optical system and the second optical system changes with high precision accordingly.
- the working distance can be set easily.
- the adjustment member is in the second position, the adjustment member is fixed to the spiral groove, and thereby the rotation of the rotary cylinder with respect to the fixed cylinder is prevented. Therefore, after setting the working distance, the rotating cylinder can be easily fixed to the fixed cylinder without using an adhesive or a separate fixing member.
- the adjustment member returns to the first position, so that the rotating cylinder can be rotated relative to the fixed cylinder. .
- This loupe has the lens barrel described above.
- the present invention it is possible to provide a lens barrel and a loupe using the lens barrel that can arbitrarily adjust the working distance while having a lightweight, simple and small configuration.
- FIG. 5 It is an external appearance perspective view of the spectacles which attached the loupe provided with the lens barrel concerning this embodiment. It is a perspective view shown in the state where the loupe 100 concerning this embodiment was disassembled. It is an optical axis direction sectional view of loupe 100 concerning a 1st embodiment. It is an optical axis direction sectional view of loupe 100 concerning a 1st embodiment.
- (A) to (c) are cross-sectional views of the rotating cylinder 110 and the prism holding cylinder 122 in the vicinity of the through hole 110d. It is sectional drawing similar to FIG.5 (b) concerning the modification of this embodiment. It is sectional drawing similar to FIG.5 (b) concerning another modification of this embodiment.
- (A)-(c) is sectional drawing of the through-hole 110d vicinity in the rotation cylinder 110 and the prism holding cylinder 122 concerning 2nd Embodiment.
- (A)-(c) is sectional drawing of the through-hole 110d vicinity in the rotation cylinder 110 and the prism holding cylinder 122 concerning 3rd Embodiment.
- FIG. 1 is an external perspective view of spectacles to which a loupe having a lens barrel according to this embodiment is attached.
- loupes 100 are respectively attached to the lenses LS of the glasses GL.
- the loupe 100 comes to be positioned in front of the pupil, so that the affected part can be enlarged and observed. Since the two loupes 100 have the same configuration, only one loupe 100 will be described below.
- FIG. 2 is a perspective view showing the loupe 100 according to the present embodiment in an exploded state.
- the loupe 100 includes a rotating cylinder 110 and a fixed unit (fixed cylinder) 120.
- An adjustment member 140 is attached to the rotating cylinder 110.
- the thin metal rotating cylinder 110 includes a large cylindrical portion 110a, a small cylindrical portion 110b included therein, and a tapered portion that connects ends of the large cylindrical portion 110a and the small cylindrical portion 110b. 110c.
- lenses L1 and L2 constituting the first lens group G1 are disposed and fixed to the small cylindrical portion 110b by an annular fixing member 111.
- An O-ring OR is disposed around the lens L1 closest to the subject, and seals between the small cylindrical portion 110b so as to be dustproof and waterproof.
- the large cylindrical portion 110a has through-holes 110d at two opposing positions.
- the through hole 110d has an internal thread on the inner periphery.
- the adjustment member 140 has a male screw on the outer periphery, and the adjustment member 140 is attached to the rotating cylinder 110 by screwing both screws.
- the fixed unit 120 includes a main fixed cylinder 121, a prism holding cylinder 122 connected to the subject side of the main fixed cylinder 121, a cam cylinder 123 disposed inside the main fixed cylinder 121, and an inner side of the main fixed cylinder 121. And an operation ring 124 arranged.
- the substantially cylindrical prism holding cylinder 122 fixes a holding frame 125 holding a Kepler type prism PR for securing an erect image and a lens L3 to the inside by a bolt BT (FIG. 3).
- the prism PR and the lens L3 constitute a second lens group G2.
- a spiral groove 122 a is formed on the outer periphery of the prism holding cylinder 122, and the tip of the adjustment member 140 is in contact therewith.
- a recess that can engage a tool such as a screwdriver is formed on the top surface of the adjustment member 140. The relationship between the adjustment member 140 and the spiral groove 122a will be described later.
- the cam cylinder 123 has two cam grooves 123a and 123b extending in the circumferential direction, and circular openings 123c at predetermined intervals along the cam groove 123a.
- screws 128 having a cylindrical shaft 128a with flanges are respectively screwed into three (only one shown) screw holes 126a formed on the outer periphery of the holding frame 126 so that the cylindrical shaft 128a can rotate.
- the fitted roller 130 is fitted into the cam groove 123a of the cam cylinder 123 and can roll along the cam groove 123a.
- a bag hole 126b is provided adjacent to one screw hole 126a of the holding frame 126.
- a coil spring CS and a ball BL are disposed in the bag hole 126b, and the ball BL is radiused by the urging force of the coil spring CS. It is urging outward in the direction.
- the position of the circular opening 123c corresponds to the position of the relatively rotating ball BL.
- a screw 129 having a cylindrical shaft 129a with a flange is screwed into three (only one shown) screw holes 127a formed on the outer periphery of the holding frame 127 so that the cylindrical shaft 129a can rotate.
- the roller 131 fitted to the cam cylinder 123 is fitted into the cam groove 123b of the cam cylinder 123 and can roll along the cam groove 123b.
- the main fixed cylinder 121 has a shape in which the large cylindrical portion 121a and the small cylindrical portion 121b are directly connected.
- a rectilinear groove 121c (FIG. 3) extending in the axial direction is formed on the inner side of the large cylindrical portion 121a whose end is connected to the prism holding cylinder 122.
- the heads of the screws 128 and 129 and the roller 130 are formed.
- 131 are engaged with each other so as to be relatively movable.
- the holding frames 126 and 127 can be displaced only along the rectilinear groove 121c (that is, cannot be rotated).
- the cam cylinder 123 is disposed inside the large cylindrical portion 121a so as to be relatively rotatable, and the operation ring 124 is disposed outside the large cylindrical portion 121a so as to be relatively rotatable.
- an opening 124a is formed at the center of the operation ring 124, and a stepped screw 135 inserted through the opening 124a passes through a circumferential groove 121d formed in the large cylindrical portion 121a, The thick shaft portion is brought into contact with the outer periphery of the cylinder 123 at the same time.
- the operation ring 124 and the cam cylinder 123 rotate integrally while maintaining a predetermined interval.
- annular portion 123 d facing outward in the radial direction at the end of the cam cylinder 123 is formed between the annular recess 121 e formed at the end of the large cylinder 121 a and the end of the prism holding cylinder 122.
- the cam cylinder 123 and the operation ring 124 cannot be displaced in the optical axis direction with respect to the main fixed cylinder 121.
- the outer ends of the large cylindrical portion 121 a and the operation ring 124 are surrounded by the ends of the large cylindrical portion 110 a of the rotating cylinder 110.
- An O-ring OR is disposed between the stepped screw 135 and the opening 124a, and between the rotating cylinder 110 and the large cylindrical portion 121a and between the large cylindrical portion 121a and both ends of the operation ring 124. Is provided with an O-ring OR and sealed between them so as to be dustproof and waterproof. Further, as shown in FIG. 2, a periodic knurled flat knurled 124 b is formed on the outer periphery of the operation ring 124 as a slip stopper at the time of operation.
- the small cylindrical portion 121b of the main fixed cylinder 121 lenses L6, L7, and L8 constituting the fifth lens group G5 are fixed via annular fixing members 132 and 133.
- an eyepiece lens OC is fixed by an annular fixing member 134 adjacent to the fifth lens group G5.
- An O-ring OR is disposed between the small cylindrical portion 121b and the eyepiece lens OC, and is sealed so as to be dustproof and waterproof.
- the first lens group G1 is a first optical system
- the lens groups G2 to G5 are second optical systems.
- FIG. 5 is a cross-sectional view of the rotating cylinder 110 and the prism holding cylinder 122 in the vicinity of the through hole 110d, which is shown together with the adjusting member 140.
- the adjustment member 140 has a configuration in which a first cylindrical portion 140a and a second cylindrical portion 140b having a smaller diameter are connected in series.
- a male screw 140c is formed on the outer periphery of the first cylindrical portion 140a.
- the end of the second cylindrical portion 140b on the tip side forms an outer tapered surface 140d that decreases in diameter toward the tip and an inner tapered surface 140e that increases in diameter toward the tip. That is, the end of the second cylindrical portion 140b has a pointed annular portion 140f.
- a female screw 110e is formed on the inner periphery of the through hole 110d.
- the spiral groove 122a of the prism holding cylinder 122 has a bottom surface 122b and a pair of side surfaces 122c and 122d.
- the side surfaces 122c and 122 are orthogonal to the bottom surface 122b.
- the outer diameter of the second cylindrical portion 140b is substantially equal to the interval between the side surfaces 122c and 122d.
- FIG. 2 when the large cylindrical portion 110a of the rotating cylinder 110 is inserted into the fixed unit 120 along the optical axis direction (for example, linearly), the thick portion is formed so as to protrude inside the large cylindrical portion 110a.
- the cylindrical inner peripheral surface 110 f (FIG. 4) is fitted to the outer peripheral surface of the spiral groove 122 a of the prism holding cylinder 122 without backlash, so that the axis of the rotating cylinder 110 and the axis of the fixed unit 120 coincide.
- the male screw 140c of the adjusting member 140 is screwed into the two female screws 110e of the through hole 110d of the rotating cylinder 110 and assembled.
- the assembly position is such that the second cylindrical portion 140b of the adjusting member 140 enters the spiral groove 122a of the prism holding cylinder 122, but the tip end The annular portion 140f is not in contact with 122b.
- This position is referred to as a first position. In such a state, the protruding amount of the second cylindrical portion 140b of the adjustment member 140 is relatively small.
- the contact area between the adjustment member 140 and the spiral groove 122a is relatively small.
- the outer periphery of the second cylindrical portion 140b enters the spiral groove 122a of the prism holding cylinder 122 so as to come into contact with the side surfaces 122c and 122d so as to be relatively slidable.
- the tip of the adjustment member 140 does not contact the bottom surface 122b. Therefore, the adjustment member 140 is guided along the side surfaces 122c and 122d.
- the top surface of the adjustment member 140 is flush with the outer peripheral surface of the rotating cylinder 110.
- the outer periphery of the second cylindrical portion 140b is not in contact with the side surfaces 122c and 122d of the spiral groove 122a.
- the outer periphery of the second cylindrical portion 140b is in contact with the side surfaces 122c and 122d of the spiral groove 122a. This is preferable because the loupe can be adjusted without rattling.
- the adjustment member 140 With the adjustment member 140 held in the first position, the amount of rotation of the rotary cylinder 110 relative to the fixed unit 120 can be adjusted by rotating the rotary cylinder 110 relative to the fixed unit 120 by screwing. As a result, the distance between the axes of the lens group G1 and the lens groups G2 to G5 changes, so that a desired working distance can be set.
- the adjustment member 140 is screwed in further by a tool (not shown). As a result, the pointed annular portion 140f of the adjustment member 140 comes into contact with the bottom surface 122b of the spiral groove 122a and bites. This position is referred to as a second position.
- the pressing force (frictional force) acting between the adjustment member 140 and the spiral groove 122a in the first position (the pressing force acting between the adjustment member 140 and the spiral groove 122a in the second position ( (Frictional force) becomes larger, so that the rotating cylinder 110 can be reliably fixed to the fixed unit 120.
- the center of the tip of the adjustment member 140 can be sharpened, in such a configuration, when the amount of biting at the second position is small, the fixing force is insufficient, and the rotation of the rotating cylinder 110 may be allowed.
- the annular portion 140f is preferable because there is no such fear.
- the rotating cylinder and the fixed cylinder mean that one of them rotates relative to the other.
- an adjusting member may be provided in the fixed cylinder, and a spiral groove may be provided in the rotating cylinder.
- the adjustment member 140 When resetting the working distance, the adjustment member 140 is rotated in the reverse direction using a tool (not shown) and returned to the first position, thereby rotating the rotary cylinder 110 relative to the fixed unit 120 in a spiral manner. Can do.
- the subject When the user wears the glasses GL, the subject can be enlarged and observed through the lens groups G1 to G5 in the loupe 100.
- the cam cylinder 123 is rotated by rotating the operation ring 124.
- the screws 128 and 129 receive torque that rotates in the same direction from the cam grooves 123a and 123b, but are prevented from rotating by the rectilinear grooves 121c, respectively, so that while relatively moving along the cam grooves 123b and 123c,
- the holding frame 126 is displaced in one direction in the optical axis direction
- the holding frame 127 is displaced in the other direction in the optical axis direction, thereby changing the distance between the third lens group G3 and the fourth lens group G4 to obtain a magnification. Changes can be made.
- each time the ball BL engages with one of the circular openings 123c of the cam cylinder 123 resistance is applied to the finger of the user who operates the operation ring 124. The degree can be perceived sensuously.
- FIG. 6 is a cross-sectional view similar to FIG. 5B according to a modification of the present embodiment. 7 differs from the above-described embodiment in that an O-ring OR as a resistance means is arranged around the end of the second cylindrical portion 140b of the adjustment member 140 on the first cylindrical portion 140a side. It is. In the first position shown in FIG. 6, the O-ring OR is only slightly in contact with the first cylindrical portion 140a. When the adjustment member 140 is screwed from such a state, the O-ring OR is crushed and deformed between the first cylindrical portion 140a and the outer peripheral surface of the prism holding cylinder 122 around the spiral groove 122a, and a predetermined resistance is obtained. Will be granted. That is, when the operator screwed the adjustment member 140 using a tool (not shown), it is possible to grasp that the operator has approached the second position by sensing a predetermined resistance through the tool. A disc spring or the like can be used instead of the O-ring.
- FIG. 7 is a cross-sectional view similar to FIG. 5B according to another modification of the present embodiment. 7 differs from the above-described embodiment in that the side surfaces 122c and 122d of the spiral groove 122a are inclined with respect to the bottom surface 122b, that is, an inclined surface in which the distance between the side surfaces 122c and 122d increases as the distance from the bottom surface 122b increases. Further, the second cylindrical portion 140b of the adjustment member 140 is a conical tapered surface corresponding to the side surfaces 122c and 122d. Thereby, the movement of the adjustment member 140 at the time of adjustment becomes smooth like a cam pin.
- the prism holding cylinder 122 is formed by injection molding from a mold using a resin, it is preferable because the releasability of the spiral groove is increased. Even in the above modification, in the first position, the outer periphery of the second cylindrical portion 140b of the adjustment member 140 is in contact with the side surfaces 122c and 122d and is relatively slidable in the first position.
- FIG. 8 is a cross-sectional view of the rotating cylinder 110 and the prism holding cylinder 122 in the vicinity of the through hole 110d according to the second embodiment, and is shown together with the adjusting member 140.
- FIG. The embodiment of FIG. 8 differs from the above-described embodiment in that a hemispherical protrusion 140g is formed at the center of the tip of the second cylindrical portion 140b instead of providing an inner tapered surface, and a spiral groove corresponding to this is formed.
- a small groove 122e extending along the spiral groove 122a is formed at the center of the bottom surface 122b of 122a. The width of the small groove 122e is smaller than the maximum diameter of the protrusion 140g.
- the outer periphery of the second cylindrical portion 140b of the adjustment member 140 is in contact with the side surfaces 122c and 122d and can slide relative to each other, as in the above-described embodiment. At this time, the protrusion 140g is separated from the small groove 122e.
- the adjustment member 140 is further screwed in so that the protrusion 140g enters (inserts) into the small groove 122e and is deformed so as to be expanded. Thereby, the rotating cylinder 110 can be reliably fixed to the fixed unit 120.
- the tip flat surface around the protrusion 140g of the second cylindrical portion 140b abuts against the bottom surface 122b of the spiral groove 122a, so that further adjustment of the adjustment member 140 is avoided and damage to the spiral groove 122a can be avoided.
- FIG. 9 is a cross-sectional view of the rotating cylinder 110 and the prism holding cylinder 122 in the vicinity of the through hole 110d according to the third embodiment, and is shown together with the adjusting member 140.
- a third cylindrical portion 140h is formed between the first cylindrical portion 140a and the second cylindrical portion 140b.
- the outer diameter of the third cylindrical portion (referred to as a large diameter portion) 140h is smaller than the outer diameter of the first cylindrical portion 140a, but is larger than the outer diameter of the second cylindrical portion (referred to as a small diameter portion) 140b. It has become.
- the tip of the second cylindrical portion 140b is a flat surface.
- a pair of side walls 122f and 122g are formed on both sides of the spiral groove 122a on the outer peripheral surface of the prism holding cylinder 122, and extend spirally along the spiral groove 122a.
- the outer periphery of the second cylindrical portion 140b of the adjustment member 140 is in contact with the side surfaces 122c and 122d and can be slid relative to each other, as in the above-described embodiment.
- the third cylindrical portion 140h is separated from the side walls 122f and 122g.
- the third cylindrical portion 140h enters and presses between the side walls 122f and 122g by screwing the adjusting member 140 so as to further drive it. Thereby, the rotating cylinder 110 can be reliably fixed to the fixed unit 120.
- the rotating cylinder has a through hole
- the adjusting member is a cylindrical member inserted into the through hole. Accordingly, it is possible to displace between the first position and the second position by operating the cylindrical member inserted into the through hole from the outside.
- the through hole has a female screw
- the adjustment member has a male screw that is screwed into the female screw, and the adjustment member is rotated with respect to the through hole, so that the second member is moved from the first position to the second member. It is preferable to be displaced to the position. If the male screw of the adjustment member is screwed into the female screw of the through hole, the adjustment member is rotated with respect to the through hole, so that the adjustment from the first position to the second position can be accurately performed.
- the adjusting member stays in the second position with a strong frictional force acting between both screws, and the rotating cylinder is inadvertently rotated relative to the fixed cylinder. Can be suppressed.
- the pressing force between the adjustment member and the spiral groove when the adjustment member is in the first position is equal to the pressing force between the adjustment member and the spiral groove when the adjustment member is in the second position. It is preferable that it is smaller than the pressing force. In this way, by changing the pressing force between the adjustment member and the spiral groove, the adjustment member and the spiral groove can be slid when the adjustment member is in the first position, and the adjustment The adjustment member may be fixed to the spiral groove when the member is in the second position.
- the spiral groove has a bottom surface and a side surface
- the adjustment member has a tip that faces the bottom surface and a peripheral surface that faces the side surface
- the adjustment member is in the first position.
- the peripheral surface is in contact with the side surface so as to be relatively movable
- the tip is in contact with the bottom surface so as not to be relatively movable.
- the peripheral surface abuts on the side surface so as to be relatively movable, so that the spiral groove has a cam groove function, and the adjustment member has a cam follower function.
- the rotating cylinder can be guided with high accuracy along the spiral groove.
- the tip is in contact with the bottom surface so as not to be relatively movable, so that the rotating cylinder can be reliably fixed to the fixed cylinder.
- a side surface of the spiral groove is tapered, and a peripheral surface of the adjusting member is tapered corresponding to the tapered side surface.
- annular ridge is formed at the tip of the adjusting member.
- the annular protruding portion bites into the bottom surface of the spiral groove, so that the rotating cylinder can be reliably fixed to the fixed cylinder.
- the center of the tip of the adjustment member may be sharpened.
- the spiral groove has a bottom surface having a small groove extending along the spiral groove and a side surface, and the adjustment member forms a protrusion that faces the small groove and is larger than the width of the small groove.
- the peripheral surface is in contact with the side surface so as to be relatively movable, and the adjustment member is in the second position.
- the protrusion is fitted into the small groove to fix the two so as not to move relative to each other.
- the peripheral surface abuts on the side surface so as to be relatively movable, so that the spiral groove has a cam groove function, and the adjustment member has a cam follower function.
- the rotating cylinder can be guided with high accuracy along the spiral groove.
- the protrusion fits into the small groove and fixes the two so that they cannot move relative to each other, so that the rotating cylinder can be securely fixed to the fixed cylinder.
- the fixed cylinder has a pair of side walls extending outside the side surface of the spiral groove, and the adjustment member has a small diameter portion facing the side surface and a large diameter larger than the interval between the side surfaces. And when the adjustment member is in the first position, the small diameter portion abuts against the side surface so as to be relatively movable, and when the adjustment member is in the second position, the large diameter portion It is preferable to contact the side wall so as not to be relatively movable. When the adjustment member is in the first position, the small diameter portion abuts on the side surface so as to be relatively movable, so that the spiral groove has a cam groove function, and the adjustment member has a cam follower function. Thus, the rotating cylinder can be guided with high accuracy along the spiral groove. On the other hand, when the adjustment member is in the second position, the large diameter portion abuts against the side wall so as not to be relatively movable, so that the rotating cylinder can be reliably fixed to the fixed cylinder.
- a resistance unit that provides a predetermined resistance when the adjustment member is displaced to the second position is formed between the adjustment member and the fixed cylinder.
- the resistance means provides a predetermined resistance. Therefore, when the adjusting member is operated, the adjusting member is displaced to the second position. Since the operator can recognize with a predetermined resistance, problems such as excessive tightening can be avoided.
- the resistance means is preferably an O-ring.
- the resistance means can be simplified by using an O-ring.
- an operation ring capable of changing the magnification of the subject when observing the subject via the first and second optical systems is provided. Thereby, the user can change the magnification of the subject.
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Abstract
Description
第1の光学系を保持すると共に、内周面から突出可能な調節部材を備えた回転筒と、
第2の光学系を保持すると共に、前記調節部材が係合する螺旋溝を外周面に備えた固定筒と、を有するレンズ鏡筒であって、
前記調節部材は、前記螺旋溝に対し、第1の位置と第2の位置をとることができ、前記第1の位置又は前記第2の位置のいずれの位置においても前記調節部材の一部は前記螺旋溝内に入っており、
前記調節部材が前記第1の位置にあるときに、前記調節部材は前記螺旋溝に沿って摺動可能であり、それにより前記固定筒に対して前記回転筒が相対螺旋回動するようになっており、
前記調節部材が前記第2の位置にあるときに、前記調節部材は前記螺旋溝に当接しており、それにより前記固定筒に対する前記回転筒の回動が阻止されるようになっていることを特徴とする。
110 回転筒
110a 大円筒部
110b 小円筒部
110c テーパ部
110d 貫通孔
110f 肉厚部
111 固定部材
120 固定ユニット
121 主固定筒
121a 大円筒部
121b 小円筒部
121c 直進溝
121d 周方向溝
121e 環状凹部
122 プリズム保持筒
122a 螺旋溝
122b 底面
122c,122d 側面
122e 小溝
122f,122g 側壁
123 カム筒
123a カム溝
123b カム溝
123c 円形開口
123d 環状部
124 操作環
124a 開口
124b 平目ローレット
125 保持枠
126 保持枠
126a 孔
126b 袋孔
127 保持枠
127a 孔
128、129 ねじ
128a 円筒軸
129a 円筒軸
130 ローラ
131 ローラ
132,133 固定部材
134 固定部材
140 調節部材
140a 円筒部
140b 円筒部
140d 外側テーパ面
140e 内側テーパ面
140f 環状部
140g 突起
140h 円筒部
BL ボール
BT ボルト
CS コイルバネ
G1 レンズ群
G1-G5 レンズ群
GL 眼鏡
LS レンズ
OC 接眼レンズ
OR リング
PR プリズム
Claims (13)
- 第1の光学系を保持すると共に、内周面から突出可能な調節部材を備えた回転筒と、
第2の光学系を保持すると共に、前記調節部材が係合する螺旋溝を外周面に備えた固定筒と、を有するレンズ鏡筒であって、
前記調節部材は、前記螺旋溝に対し、第1の位置と第2の位置をとることができ、前記第1の位置又は前記第2の位置のいずれの位置においても前記調節部材の一部は前記螺旋溝内に入っており、
前記調節部材が前記第1の位置にあるときに、前記調節部材は前記螺旋溝に沿って摺動可能であり、それにより前記固定筒に対して前記回転筒が相対螺旋回動するようになっており、
前記調節部材が前記第2の位置にあるときに、前記調節部材は前記螺旋溝に当接しており、それにより前記固定筒に対する前記回転筒の回動が阻止されるようになっていることを特徴とするレンズ鏡筒。 - 前記回転筒は貫通孔を有し、前記調節部材は前記貫通孔に挿入された円筒状部材である請求項1に記載のレンズ鏡筒。
- 前記貫通孔は雌ねじを有し、前記調節部材は前記雌ねじに螺合する雄ねじを有し、前記調節部材を前記貫通孔に対して回転させることで、前記第1の位置から前記第2の位置へと変位するようになっている請求項1又は2に記載のレンズ鏡筒。
- 前記第1の位置における、前記調節部材と前記螺旋溝との押圧力は、前記第2の位置における、前記調節部材と前記螺旋溝との押圧力よりも小さい請求項1~3のいずれかに記載のレンズ鏡筒。
- 前記螺旋溝は底面と側面とを有し、前記調節部材は、前記底面に対向する先端と、前記側面に対向する周面とを有し、前記調節部材が前記第1の位置にあるときには、前記周面が前記側面に相対移動可能に当接し、前記調節部材が前記第2の位置にあるときには、前記先端が前記底面に相対移動不能に当接する請求項1~4のいずれかに記載のレンズ鏡筒。
- 前記螺旋溝の側面がテーパ状になっており、前記調節部材の周面が前記テーパ状の側面に対応してテーパ状になっている請求項5に記載のレンズ鏡筒。
- 前記調節部材の先端には、環状の隆起部が形成されている請求項5又は6に記載のレンズ鏡筒。
- 前記螺旋溝は、前記螺旋溝に沿って延在する小溝を備えた底面と、側面とを有し、前記調節部材は、前記小溝に対向し前記小溝の幅よりも大きな突起を形成した先端と、前記側面に対向する周面とを有し、前記調節部材が前記第1の位置にあるときには、前記周面が前記側面に相対移動可能に当接し、前記調節部材が前記第2の位置にあるときには、前記突起が前記小溝に嵌入して両者を相対移動不能に固定する請求項1~4のいずれかに記載のレンズ鏡筒。
- 前記固定筒は、前記螺旋溝の側面より外側を延在する一対の側壁を有し、前記調節部材は、前記側面に対向する小径部と、前記側面の間隔よりも大径の大径部とを有し、前記調節部材が前記第1の位置にあるときには、前記小径部が前記側面に相対移動可能に当接し、前記調節部材が前記第2の位置にあるときには、前記大径部が前記側壁に相対移動不能に当接する請求項1~4のいずれかに記載のレンズ鏡筒。
- 前記調節部材と前記固定筒との間には、前記調節部材が前記第2の位置へと変位する際に所定の抵抗を付与する抵抗手段が形成されている請求項1~9のいずれかに記載のレンズ鏡筒。
- 前記抵抗手段はO-リングである請求項10に記載のレンズ鏡筒。
- 前記第1および第2の光学系を介して被写体を観察する際に前記被写体の倍率変更が可能な操作環を備える請求項1~11のいずれかに記載のレンズ鏡筒。
- 請求項1~12のいずれかに記載のレンズ鏡筒を有することを特徴とするルーペ。
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JP2016529249A JP6525398B2 (ja) | 2014-06-18 | 2015-06-08 | レンズ鏡筒及びルーペ |
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