JP2012123154A - Binocular - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure having fewer number of components and being strong against shock in alignment of an optical axis of a binocular having a left and right pair of objective optical systems, upright optical systems, and eyepiece optical systems, respectively.SOLUTION: In the binocular, there is a left and right pair of lens holding cylinders 1L and 1R. The left and right pair of lens holding cylinders 1L and 1R is positioned and fixed to a predetermined position of a tip of a fixing member 2. An adjustment member is arranged in a counter position across the optical axes of the lens holding cylinders 1L and 1R with respect to a reference member. Flange shapes are provided on the circumferences of the rear ends of the lens holding cylinders 1L and 1R, and a plurality of corresponding flange shapes are provided on the circumference of the tip of the fixing member 2. These two types of flange shapes constitute a bayonet connection. Further, the lens holding cylinders 1L and 1R can move in a plane vertical to the optical axis, and an optical axis alignment can be made by oscillating the lens holding cylinders in the directions different to each other by the adjustment member with the reference member as a center of oscillation.

Description

  The present invention relates to binoculars having an optical axis adjustment mechanism capable of adjusting the parallelism of the optical axes of a pair of left and right optical systems by a simple method.

  The binoculars are equipped with a pair of left and right objective optical systems, a pair of left and right erecting optical systems composed of a plurality of prisms and mirrors, and a pair of left and right eyepiece optical systems. Has been proposed.

  In Patent Document 1, there are a pair of left and right objective lens barrels and a fixing member, and each objective lens barrel has a mounting hole.

  The objective lens barrel is fixed to the fixing member with two screws. Here, the diameter of the mounting hole is set to be slightly larger than that of the mounting screw, and a configuration is proposed in which the optical axis is adjusted by moving the objective lens barrel in a direction perpendicular to the optical axis. ing.

  In Patent Document 2, an objective lens frame that holds all of the objective lens is disposed on an objective axis that extends in the same direction as the optical axis of the optical system, and the objective lens frame swings around the objective axis as a rotation center. An optical axis adjusting screw that is movable and partly threaded and whose tip is in contact with the bottom surface of the lens barrel main body is disposed. The optical axis adjustment screw is rotated to adjust the optical axis in the vertical direction. Also, the left and right optical axis adjustment is performed by engaging and moving the elongated holes of the eyepiece lens frame holding the eyepiece lens with the two convex portions extending from the lens barrel. Furthermore, a configuration has been proposed in which focus adjustment and diopter adjustment are performed by moving the objective lens frame in and out.

Japanese Patent Laid-Open No. 8-211303 JP-A-9-281411

  However, in Patent Document 1, since the objective lens barrel and the fixing member are fixed to the fixing member via the mounting holes with the mounting screws, the objective lens barrel having a large mass is disadvantageous for impact. Further, in Patent Document 2, an optical axis adjustment mechanism is provided in each of the vertical direction and the horizontal direction, and the number of parts increases, the structure becomes complicated, and the cost also increases. Further, since the optical axis adjusting screw is in contact with the exterior main body, a physical impact such as dropping is easily transmitted to the objective lens frame.

  Accordingly, an exemplary object of the present invention is to provide a binocular having a novel configuration and capable of adjusting the optical axis, which solves the above-described problems.

  In binoculars having at least a pair of left and right objective optical systems and a pair of left and right eyepiece optical systems, a pair of left and right lens holding cylinders for holding part or all of the pair of left and right objective optical systems, and the pair of left and right lenses A fixing member in which each of the holding cylinders is positioned and fixed at a predetermined position of the tip portion, and a pair of left and right lenses forming a reference for positioning each of the pair of left and right lens holding cylinders in a plane perpendicular to the optical axis. Each of the pair of left and right reference members, and a pair of left and right adjustment members disposed at substantially opposite positions across the optical axes of the pair of left and right lens holding cylinders. A combination of a plurality of flange shapes provided on the periphery of the rear end of each of the pair of lens holding cylinders and a plurality of flange shapes provided corresponding to the periphery of the front end of the fixing member. By configuring so-called bayonet coupling, the pair of left and right lens holding cylinders can be positioned at a predetermined position of the fixing member, and can be moved in a plane perpendicular to the optical axis. Optical axis adjustment is performed by swinging the pair of left and right lens holding cylinders in different directions with the pair of left and right reference members as the swing center, and the pair of left and right lens holding cylinders is positioned with respect to the fixed member. It is characterized by things.

  According to the present invention, the optical axis adjustment is performed with a simple structure in which the number of components is reduced by providing the optical axis adjustment function in both the vertical and horizontal directions in the connecting structure of the lens holding cylinder and the fixing member. And the cost can be reduced. The adjustment member after the optical axis adjustment work becomes a reinforcing member against physical impact.

Sectional view of the main part of Example 1 Perspective view of Example 1 Front view of Example 1 Exploded perspective view of Example 1 Exploded exploded perspective view of the lens barrel 1R and the fixed barrel 2 of the first embodiment Sectional view of the AA portion of the lens barrel 1R and the fixed barrel 2 of FIG. Front view of the eccentric member of Example 1 Side view of the eccentric member of Example 1 Rectangular portion of eccentric member of embodiment 1 Sectional view of the BB portion of FIG. 8a of the eccentric member of Example 1 1 is an exploded perspective view of a shake correction unit of Embodiment 1. FIG. Swing schematic diagram of lens barrel 1R of Example 1 Optical axis adjustment procedure of Embodiment 1 FIG. FIG. 2 is an optical axis adjustment procedure according to the first embodiment. FIG. 2 is an optical axis adjustment procedure according to the first embodiment. FIG. 2 is an optical axis adjustment procedure according to the first embodiment. FIG. 2 is an optical axis adjustment procedure according to the first embodiment. FIG. 2 is an optical axis adjustment procedure according to the first embodiment. FIG. 2 is an optical axis adjustment procedure according to the first embodiment. The perspective view of Example 2 Side view of Example 2 Sectional drawing of the principal part in the AA cross section of FIG. 14 of Example 2. The disassembled perspective view of the fixed cylinder and lens barrel of Example 2

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

[Example 1]
1, 2, 3 and 4 illustrate a first embodiment in which the present invention is applied to binoculars having a shake correction function. FIG. 1 is a cross-sectional view of an essential part on a plane including left and right optical axes of a pair of left and right objective optical systems and a pair of left and right eyepiece optical systems. However, the pair of left and right erecting optical systems is represented by a projected shape. 2 is a perspective view, FIG. 3 is a front view, and FIG. 4 is an exploded perspective view.

  1 and 2, OL is the left optical axis of the objective optical system, OR is the right optical axis of the objective optical system, EL is the left optical axis of the eyepiece optical system, and ER is the right optical axis of the eyepiece optical system. The optical axis.

  L1L and L1R are lens groups that form part of a pair of left and right objective optical systems. L2L and L2R are lens groups forming part of a pair of left and right objective optical systems, and are decentering adjustment reference lenses for the left and right optical systems. L3L and L3R are shake correction lens groups that form part of the pair of left and right objective optical systems, and move the subject image created by the objective optical system by moving up and down and left and right relative to the lens groups L1L, L1R, L2L, and L2R. Let

  L4L and L4R are Polo II type erecting prisms that are a pair of left and right erecting optical systems, and L5L and L5R are eyepiece lens groups that are a pair of left and right eyepiece optical systems. The Polo II type upright prisms L4L and L4R erect the subject image formed by the objective optical system, respectively, and also deviate the optical axes OL and OR of the objective optical system to the optical axes EL and ER of the eyepiece optical system. It works to lead. The same function may be realized by combining a known roof prism, parallelogram prism, mirror, or the like.

  1L and 1R are lens barrels that hold the lens groups L1L and L1R, respectively, which are lens holding cylinders, and 2 is a fixed cylinder that is a fixing portion, which includes eccentricity adjustment reference lenses L2L and L2R. Reference numeral 50 denotes a shake correction unit including a fixed cylinder and a pair of left and right shake correction lens groups L3L and L3R.

  The lens groups L1L and L1R, the eccentricity adjustment reference lenses L2L and L2R, and the shake correction lens groups L3L and L3R constitute an objective optical system that is integrated on the left and right.

  The detailed configuration of the shake correction unit 50 will be described later.

  5L and 5R are eyepiece tubes that hold the eyepiece lens groups L5L and L5R, 4L and 4R are support frames that hold the Polo II type upright prisms L4L and L4R and the eyepiece tubes 5L and 5R, and 6L and 6R are eyepieces. It is an eyepiece rubber for observation that is integrally fixed to the eyeglass tubes 5L and 5R.

  Male helicoids are formed on the outer peripheries of the eyepiece tubes 5L and 5R, respectively, and female helicoids are formed on the inner peripheral walls of the support frames 4L and 4R, thereby forming a known helicoid configuration. Therefore, by rotating the eyepiece tubes 5L and 5R, the eyepiece lens groups L5L and L5R can be advanced and retracted in the optical axis direction, and the left and right diopter adjustments are possible. As described above, the pair of left and right eyepiece units 7L and 7R are configured.

  8 supports the eyepiece units 7L and 7R so as to be rotatable about the optical axes OL and OR of the objective optical system, and according to the subject distance to be observed by moving all the pair of left and right objective optical systems back and forth in the optical axis direction. This is a base member serving as a support portion configured to focus.

  The base member 8 is provided with openings 8L and 8R provided coaxially at 8a portions perpendicular to the optical axes OL and OR of the objective optical system, respectively, and cylindrical portions provided respectively on the support frames 4L and 4R. 4La and 4Ra can be fitted.

  Reference numerals 9L and 9R denote interlocking plates that interlock the rotational movements about the optical axes OL and OR of the objective optical systems of the eyepiece units 7L and 7R.

  The interlocking plates 9L and 9R are provided with gear portions 9La and 9Ra, respectively, and mesh with each other. Furthermore, the interlocking plates 9L and 9R are provided with a plurality of arm portions 9Lb and 9Rb that generate an urging force in the optical axis direction by being assembled at the regular positions, respectively, and the support frame 4L with the base member 8a interposed therebetween. 4R and interlocking plates 9L and 9R are fastened with screws. As a result, the eyepiece units 7L and 7R are coupled to the base member 8 so as to be rotatable in a state in which the rotational movements are linked with the optical axes OL and OR of the objective optical system as axes.

  Since the optical axes EL and ER of the eyepiece optical system are decentered with respect to the optical axes OL and OR of the objective optical system, the eyepiece units 7L and 7R are interlocked with the respective optical axes OL and OR of the objective optical system. By rotating inward or outward, the widths of the optical axes EL and ER of the eyepiece optical system change. This enables so-called eye width adjustment in which the distance between the left and right pupils of the binoculars observer matches the distance between the optical axes EL and ER of the eyepiece optical system. In addition, the positions of the polo II type erecting prisms L4L and L4R are adjusted by the eyepiece units 7L and 7R, respectively, so that the subject image observed by the left and right eyepiece lens groups L5L and L5R does not shift during eye width adjustment. The In this adjustment, the respective rotation axes of the eyepiece units 7L and 7R and the optical axes of the eyepiece lens groups L5L and L5R are made to coincide with each other.

  8b is a portion parallel to the optical axes OL and OR of the objective optical system of the base member 8, and all the pair of left and right objective optical systems are moved forward and backward in the optical axis direction to focus according to the object distance to be observed. It is the support part of the structure which performs. The 8b portion is provided with four embossed convex portions 8c.

  Reference numeral 10 denotes a focus support member to which the objective optical system is fixed. The focus support member 10 is provided with guide grooves 10a and 10b having the same width provided in the optical axis direction and 10c and 10d having a width wider than that of 10a and 10b.

  Reference numeral 11 denotes four guide members, each having a guide portion 11a fitted to the width of the guide grooves 10a and 10b and arm portions 11b on both sides. The four guide members 11 are fixed to the 8b portion of the base member 8 with screws through the guide grooves 10a, 10b and 10c, 10d of the focus support member 10 through the guide portions 11a.

  The focus support member 10 is guided by the guide portion 11a of the guide member 11 fitted in each of the guide grooves 10a and 10b so as to be able to advance and retract in the optical axis direction.

  The guide grooves 10a, 10b and 10c, 10d are pressed against the convex portions 8c of the base member 8 by pressing both side portions of the grooves with the arm portions 11b on both sides of the guide member 11.

  Furthermore, 12 is a feed screw that rotates at a fixed position. 13 is an operation dial connected to the feed screw 12 at the rear end. Reference numeral 14 denotes a bearing for supporting the operation dial 13 coupled to the feed screw 12 so as to rotate at a fixed position. The base member 8 is bent at a right angle at the rear end of the 8b portion of the base member 8 with a screw. Fixed. Reference numeral 15 denotes a female screw member that is screwed to the feed screw 12, and is fixed to a portion 10e bent at a right angle at the rear end of the focus support member 10 with screws. By rotating the operation dial 13 with the above configuration, the focus support member 10 can be moved back and forth in the optical axis direction.

  Reference numeral 16 denotes a stopper fixed to the tip of the feed screw 12 after the female screw member 15 is screwed to the feed screw 12, and the forward and backward movement of the focus support member 10 between the stopper 16 and the 8d portion. Be regulated.

  The fixed cylinder 2 has mounting bosses 2a, 2b, 2g, 2f for fastening screws to the focus support member 10, positioning pins 2c for determining the position in the left-right direction, positioning pins 2d, 2e for determining the position in the optical axis direction Is provided. The mounting bosses 2a and 2b and the positioning pin 2c pass through the opening 8e opened in the 8b portion of the base member 8, and are fixed to the focus support member 10 by two screws 17. The positioning pins 2d and 2e are fitted in long grooves 10e and 10f provided in the focus support member 10, respectively.

  Since the objective optical system integrated with the left and right in the above configuration is fixed to the focus support member 10 in the optical axis direction, depending on the subject distance to be observed by the movement of the focus support member 10 in the optical axis direction. Focusing can be performed.

  An exterior member 22 surrounds the left and right objective optical systems, the optical axis adjusting mechanism, the focusing mechanism, and the like. In FIG. 2, FIG. 3, and FIG. 4, illustration is omitted.

  FIG. 5 is a perspective view showing a coupling configuration of the lens barrel 1R holding the lens unit L1R and the fixed barrel 2. As shown in FIG. FIG. 6 is an AA cross section in which the flanges of the lens barrel 1R and the fixed barrel 2 in FIG. 3 can be seen.

  1Ra is two convex portions that are flange-shaped, and is provided at the rear end of the side surface of the lens barrel in order to attach the lens barrel 1R to the fixed cylinder 2. 2iR is two convex-shaped parts which are flange-shaped, and is provided inside the opening of the fixed cylinder 2.

  The lens barrel 1R is mirrored with a bayonet configuration in which the convex shape portion 1Ra of the lens barrel 1R is inserted inside the opening of the fixed barrel 2 into the portion without the convex shape portion 2iR, and the optical axis direction is positioned by turning a certain angle. Attach the cylinder 1R to the fixed cylinder 2. At this time, the convex part 1Ra of the lens barrel 1R and the convex part 2iR of the fixed cylinder 2 are in a light press-fit state in the optical axis direction.

  1Rd is a protruding portion of the side surface portion of the lens barrel 1R, and a through hole 1Re is opened. 1Rb is a protrusion at a position opposite to the protrusion 1Rd on the side surface of the lens barrel 1R across the optical axis, and has a long groove 1Rc. Reference numeral 20 denotes an eccentric member which is an adjustment member.

  7a is a front view of the eccentric member 20, and FIG. 7b is a right side view. The eccentric member 20 has an eccentric shaft 20a, a reference shaft 20b, and a groove 20c into which a driver tip can be inserted. The eccentric shaft 20a is eccentric to the reference value 20b by a quantitative value ε.

  2kR has a through-hole 2mR in the protruding portion of the fixed cylinder 2. In 2hR, a through hole 2jR is opened at the protruding portion of the fixed cylinder 2. Reference numeral 21 denotes a fixed reference pin which is a reference member, and the size of the diameter can be press-fitted into the through hole 2mR and the through hole 1Re.

  A process of attaching the lens barrel 1R to the fixed cylinder 2 will be described.

  FIG. 8a is an enlarged view of a portion surrounded by a rectangular frame in FIG. FIG. 8b is a cross-sectional view of the BB plane of FIG. 8a. The eccentric member 20 is assembled into the long groove 1Rc of the protrusion 1Rb of the lens barrel 1R and the through hole 2jR of the protrusion 2hR of the fixed cylinder 2. The eccentric shaft 20a of the eccentric member 20 is fitted with the long groove 1Rc with a gap slidable in the longitudinal direction, and the reference shaft 20b is lightly press-fitted into the through hole 2jR. By adhering and fixing the eccentric member 20 after the optical axis adjustment operation described below to the fixed cylinder 2, it is possible to prevent the adjustment position of the lens barrel 1R from being shifted due to a physical impact. As described above with reference to the right eye side, as shown in FIG. 4, the same structure is symmetrically arranged on the left eye side, and the structure indicated by the suffix “R” on the right eye side is the suffix “L” on the left eye side. It is expressed by. The lens barrels 1L and 1R perform optical axis adjustment, which will be described later, by swinging in different directions around the fixed reference pin 21 that is the center of swing of each of the lens barrels 1L and 1R.

  FIGS. 10a, 10b, and 10c are schematic diagrams in which the amount of movement is made larger than the actual amount so that the movement can be understood for easy understanding of the optical axis adjustment mechanism of the present embodiment. Yes. The intersection of the horizontal line and the vertical line represents the center of the lens barrel before swinging.

  FIG. 10a is a diagram of the eccentric member 20 in the initial position. The eccentric shaft 20a of the eccentric member 20 moves eccentrically around the reference shaft 20b. Arrow P is the counterclockwise direction of rotation of the eccentric member 20. The arrow Q is the clockwise rotation direction of the eccentric member 20. The eccentric member 20 is rotated in the rotation directions P and Q. The lens barrel 1R swings around the fixed reference pin 21. An arrow M indicates the displacement direction of the center of the lens barrel 1R when the eccentric member 20 is rotated in the rotation direction P. An arrow N indicates the displacement direction of the center of the lens barrel 1R when the eccentric member 20 is rotated in the rotation direction Q. Further, since the swing amount is very small, the displacement directions M and N are regarded as straight lines.

  FIG. 10b shows the state of the lens barrel 1R when the eccentric member 20 is rotated in the rotation direction P. FIG. When the eccentric member 20 is rotated in the rotation direction P, the lens barrel 1R swings in the displacement direction M around the fixed reference pin 21.

  FIG. 10c shows the state of the lens barrel 1R when the eccentric member 20 is rotated in the rotation direction Q. FIG. When the eccentric member 20 is rotated in the rotation direction Q, the lens barrel 1R swings in the displacement direction N around the fixed reference pin 21.

  11a, 11b, and 11c are conceptual diagrams showing the displacement directions of the lens barrels 1L and 1R. The left circle is a schematic diagram of the lens barrel 1R, and the right circle is a schematic diagram of the lens barrel 1L. The intersection of the horizontal and vertical lines of the lens barrels 1L and 1R represents the center of each lens barrel. The displacement directions M and N of the left circle correspond to the displacement directions in FIG.

  K is the displacement direction of the lens barrel 1L, and is directed in a direction symmetric with respect to the displacement direction M of the lens barrel 1R and the plane of symmetry of the binoculars. J is the displacement direction of the lens barrel 1L, and is directed in a direction symmetric with respect to the displacement direction N of the lens barrel 1R and the symmetry plane of the binoculars.

  FIG. 11a is a diagram for adjusting the optical axis in the left-right direction. In order to shorten the distance between the optical axes, the lens barrels 1L and 1R are displaced in the displacement directions N and J. Further, when the distance between the left and right optical axes is increased, the lens barrels 1L and 1R are displaced in the displacement directions M and K.

  FIG. 11b is a diagram illustrating the vertical optical axis adjustment in which the optical axis of the lens barrel 1R is increased while the optical axis of the lens barrel 1L is lowered while maintaining the left-right spacing of the optical axes. The horizontal direction component of the displacement direction N and the displacement direction K is the same amount, the same direction, the vertical direction component is the same amount, and different directions, so the lens barrel 1R is maintained in the lens barrel 1L while maintaining the left and right intervals of the lens barrels 1R, 1L. Can be displaced relatively upward.

  FIG. 11c is a diagram for performing vertical optical axis adjustment in which the optical axis of the lens barrel 1R is lowered and the optical axis of the lens barrel 1L is raised while maintaining the left-right spacing of the optical axes. Since the horizontal direction component of the displacement direction M and the displacement direction J is the same amount, the same direction, the vertical direction component is the same amount, and different directions, the lens barrel 1R is relatively maintained while maintaining the left and right intervals of the lens barrels 1R, 1L. The lens barrel 1L can be displaced downward.

  FIGS. 12a, 12b, and 12c are views within the left and right visual field ranges when looking at the reference subject for optical axis adjustment through the binoculars in order to explain the procedure for adjusting the left and right optical axes with the reference subject as a mark. .

  FIG. 12a shows the initial position of the mark within the field of view before the optical axis adjustment. 40 is within the viewing range of the left eye and 41 is within the viewing range of the right eye. In addition, the mark of the reference subject is “+” at infinity. 42L and 42R are images of the mark “+” observed in the eyepiece optical systems L5L and L5R through the left and right optical systems, respectively. The positions of the marks 42L and 42R in the visual field range 40 and 41 are different from each other. In the actual optical axis adjustment work, an optical axis adjuster that functions to combine the left and right visual field ranges into one is used.

  FIG. 12b shows the overlapping fields 40 and 41 in FIG. 12a.

  A two-dot chain line U represents a locus of the mark 42L when the lens barrel 1L is swung. A two-dot chain line V represents a locus of the mark 42R when the lens barrel 1R is swung.

  However, since the up / down / left / right directions are reversed by the upright optical systems L4L, L4R, the direction of movement of the mark is opposite to that of the lens barrel.

  There are two possible adjustment procedures: adjusting the vertical optical axis after adjusting the left and right optical axes, and adjusting the horizontal optical axis after adjusting the vertical optical axes in the reverse procedure.

  FIG. 12c shows the positions of the marks after the left and right optical axis adjustment operations from FIG. 12b. The displacement directions N, M, and K correspond to the displacement directions of the lens barrel 1R in FIG. 11a. FIG. 10 shows the movement of the objective tube, and FIG. 11 shows the view field range observed from the eyepiece tube. The image of the eyepiece optical system transmitted through the prism optical system is inverted vertically and horizontally with respect to the image incident from the objective optical system.

  The mark 42R indicated by a broken line for the convenience of the field-of-view ranges 40 and 41 shown in a superimposed manner was moved along the auxiliary line V in the displacement direction M of FIG. 12c. The marks 42L and 42R are aligned in the vertical direction, and the left / right optical axis adjustment is completed. Next, at the same time, the mark 42R is moved in the displacement direction N and the mark 42L is moved in the displacement direction K, and the marks are moved closer to each other until the arrows overlap. Thus, when both the marks overlap, the adjustment is completed, and the mark overlaps the intersection of the auxiliary lines U and V in FIG. 12c. FIG. 12e shows the appearance of the marks 42L and 42R after adjusting the left and right and vertical optical axes. The marks 42L and 42R coincide with the intersections of the auxiliary lines U and V, and the optical axis adjustment in the vertical and horizontal directions is completed.

  FIG. 12d shows the positions of the marks after the optical axis adjustment work in the vertical and horizontal directions from FIG. 12b. The mark 42L indicated by a broken line for the convenience of the visual field ranges 40 and 41 shown in an overlapping manner was moved along the auxiliary line U in the displacement direction K. The marks 42L and 42R are arranged side by side on the left and right, and the upper and lower optical axes coincide with each other. Next, at the same time, the mark 42R is moved in the displacement direction M and the mark 42L is moved in the displacement direction K, and both marks are brought close to each other until they overlap. Then, the adjustment is finished when both marks overlap. It overlaps the intersection position of the auxiliary lines U and V in FIG. FIG. 12e shows the appearance of the marks 42L and 42R after adjusting the left and right and vertical optical axes. The marks 42L and 42R coincide with the intersections of the auxiliary lines U and V, and the optical axis adjustment in the vertical and horizontal directions is completed.

  As described above, the adjustment result is the same even if the procedure is different.

  FIG. 12f shows a state of the adjusting machine display system 43 when a chart in which a plurality of auxiliary lines parallel to the swing directions of the lens barrels 1L and 1R are drawn is incorporated in the optical axis adjusting machine. The intersection of the respective auxiliary lines passing through the marks 42L and 42R is the adjustment target point. The signs 42L 'and 42R' are the states in the adjusting machine display system 43 of the target 42 as viewed from another binocular. In this case as well, the intersection of the auxiliary lines on the chart is the adjustment target point.

  In both cases, since the adjustment target point is known in advance, it is possible to perform an efficient adjustment operation without going through the above left, right, and upper and lower optical axis adjustment procedures.

  The parallelism of the left and right optical axes in the binoculars optical axis adjustment standard is defined in Japanese Industrial Standard [JIS B 7121].

  For example, in AA class binoculars having a magnification of 10 times, the allowable value is an angle in the real field of view, the vertical direction is 2.5 minutes, the left and right outer directions are 3.5 minutes, and the inner direction is 7.5 minutes. The inward direction is a so-called cross direction. When people look at objects at short distances, they naturally become cross-eyed, so the cross-direction can be adjusted relatively easily. However, since the eye movements in the outward direction and the upward / downward direction are not naturally possible, if the shift amount is large, it is very tired or it is difficult to overlap the left and right subject images. Note that the above-described allowable value becomes smaller as the magnification increases.

  Further, θ in FIG. 10a is a swing angle between the horizontal line and the displacement directions M and N. Since the optical axis adjustment standard is stricter in the vertical direction than the horizontal direction, it is easier to adjust the vertical optical axis more precisely if the vertical adjustment sensitivity of the lens barrel 1L or 1R is smaller than the horizontal adjustment sensitivity. In addition, reliability against impacts and the like is also increased. Therefore, it is desirable that the swing angle θ be 45 ° or less.

  FIG. 9 is an exploded perspective view of the shake correction unit 50. FIG. Reference numeral 24 denotes a movable member that integrally holds the shake correction lens groups L3L and L3R. When the movable member 24 moves up and down and left and right without rotating with respect to the fixed cylinder 2, the lens groups L1L and L1R and the shake correction lens groups L3L and L3R are decentered to move an image of a subject formed by the objective optical system.

  Reference numeral 25 denotes a guide member supported so as to be movable only in the lateral direction with respect to the fixed cylinder 2. 26 and 27 are guide bars for guiding the lateral movement of the guide member 25, and the end portions thereof are respectively inserted into the groove portions 2a, 2b and 2c, 2d of the fixed cylinder 2, and are base members by press-fitting or bonding. Fastened to 2. A drive coil 28 is fixed to the guide member 25 by adhesion or the like. Reference numeral 29 denotes a drive magnet, which is magnetized into two poles, N pole and S pole, in the left-right direction as shown. 31 is a yoke, which is fixed to a mounting boss 2e provided on the fixed cylinder 2 penetrating the guide member 25 with a screw.

  The yoke 31 opens a space on the front side of the drive magnet 29 and closes the magnetic circuit. A drive coil 28 is disposed between the drive magnet 29 and the yoke 31. When the drive coil 28 is energized, a Lorentz force is generated to move the guide member 25 in the lateral direction. In addition, a hall element 32 that is a magnetic sensor is disposed at the center of the drive coil 28 so as to be integrated with the guide member 25. The hall element 32 detects the position of the guide member 25 in the lateral direction by converting the magnetic flux density in the optical axis direction at the boundary portion (center portion of the magnet) of the two-pole magnetization of the drive magnet 29 into an electric signal.

  Reference numerals 33 and 34 denote guide bars, which support the movable member 24 so as to be movable with respect to the guide member 25 only in the vertical direction. The end portions of the guide bars 33, 34 are inserted into the groove portions 25a, 25b and 25c, 25d of the guide member 25 and fixed to the guide member 25 by press-fitting or bonding. Reference numeral 35 denotes a drive coil, which is fixed to the movable member 24 by adhesion or the like. Reference numeral 36 denotes a drive magnet, and the same magnet as the drive magnet 29 changes the angle by 90 degrees, and the N pole and the S pole are arranged in the vertical direction. Reference numeral 37 denotes a rear yoke of the drive magnet 36. The yoke on the drive coil 35 side of the drive magnet 36 is also used as the yoke 31 to close the magnetic circuit of the drive magnet 36. Reference numeral 38 denotes a support member for the drive magnet 36, which is fixed to the fixed cylinder 2 by screws. When the drive coil 35 is energized, Lorentz force is generated to move the movable member 24 in the vertical direction.

  Although not shown in the drawing of the present embodiment, an electric board is integrally fixed to the shake correction unit 50. The substrate is provided with a sensor for detecting angular velocity in the pitching and yawing directions of binoculars, for example, a vibration gyro and the above-described processing elements for the wheel elements 32 and 39 and the drive coils 28 and 35 and a shake correction operation. A microcomputer or the like is mounted. In addition, a power supply unit for supplying power to the electric board, an operation switch for switching between operation and non-operation of shake correction, a display device such as an LED indicating an operation state, and the like are integrally disposed with the exterior 22.

  Since the movable part and the optical axis adjusting mechanism with focusing are protected by the exterior member and are not directly subjected to external force, it is advantageous for binocular vibration, drop impact, and the like.

[Example 2]
FIG. 13 is a perspective view of a second embodiment of binoculars in which the lens barrels 1L and 1R according to the first embodiment of the present invention are changed to high-magnification objective lens barrels and the adjusting member is arranged in a direction perpendicular to the optical axis. . FIG. 14 is a side view, FIG. 15 is a cross-sectional view of the principal part showing a coupling configuration of the lens barrel 101R and the fixed tube 102 in AA cross section in FIG. 14, and FIGS. 16a and 16b are exploded perspective views of the fixed tube and the lens barrel. In FIG. 13, as in Example 1, OL is the left optical axis of the objective optical system, OR is the right optical axis of the objective optical system, EL is the left optical axis of the eyepiece optical system, and ER is the eyepiece optical system. Is the right optical axis.

  L11L and L11R are lens groups that form part of a pair of left and right objective optical systems. Reference numerals 101L and 101R denote lens barrels that hold the lens groups L11L and L11R, respectively. The binoculars of Example 2 are brighter and brighter than those of Example 1. Therefore, the lens barrel 101R of the second embodiment has a diameter that matches the enlarged lens groups L11L and L11R.

  106L and 106R are a pair of left and right eyepiece units. Reference numeral 107 denotes a fixed cylinder that is a fixed portion that supports the pair of left and right eyepiece units and the pair of left and right objective optical systems. The eyepiece units 106L and 106R are attached to a portion 107a perpendicular to the optical axes OL and OR of the objective optical system of the base member 107. Since the mounting configuration and the eye width adjustment mechanism are the same as those in the first embodiment, description thereof is omitted. Reference numeral 150 denotes a shake correction unit.

  In FIGS. 16a and 16b, 101Ra is a convex portion attached to the rear end of the lens barrel 101R. 101Rb is a long groove at the rear end of the lens barrel 101R. 101Rd is a protruding portion of the lens barrel 101R, and a through hole 101Rc is opened. 101Ra is two convex portions that are flange-shaped, and is provided at the rear end of the side surface of the lens barrel in order to attach the lens barrel 101R to the fixed cylinder 102.

  102iR is two convex portions that are flange-shaped, and is provided inside the opening of the fixed cylinder 102. 102kR is a protruding portion of the fixed cylinder 102 and has a through hole 102mR. 102aR is a through hole that is opposite to 102mR across the optical axis.

  Reference numeral 120 denotes an eccentric member which is an adjustment member. A reference shaft 120a, an eccentric shaft 120b, and a groove 120c into which a driver-tip portion can be inserted are provided. Reference numeral 121 denotes a fixed reference pin which is a reference member, and has a diameter that can be press-fitted into both the through hole 102mR and the through hole 101Rc.

  Next, a method for assembling the fixed cylinder 102 and the lens barrel 101R will be described. The lens barrel 101R is a mirror with a bayonet configuration in which the convex shape portion 101Ra of the lens barrel 101R is inserted into the portion without the convex shape portion 102iR inside the opening of the fixed barrel 102, and the optical axis direction is positioned by turning a certain angle. The cylinder 101R is attached to the fixed cylinder 102. At this time, the convex part 101Ra of the lens barrel 101R and the convex part 102iR of the fixed cylinder 102 are lightly press-fitted in the optical axis direction.

  101Rd is a protruding portion of the side surface portion of the lens barrel 1R, and a through hole 101Rc is opened. 101Rb is a long groove that is opposed to the protrusion 101Rd on the side surface of the lens barrel 101R across the optical axis.

  A process of attaching the lens barrel 101R to the fixed cylinder 102 will be described. The lens barrel 101R is coupled to the fixed cylinder 102 in a bayonet configuration, and the optical axis direction is positioned. Thereby, the lens barrel 101R can be moved in a plane perpendicular to the optical axis. Next, the fixed reference pin 121 is press-fitted from the rear of the lens barrel 101R into the through hole 101Rc of the protrusion 101Rd of the lens barrel 101R and the through hole 102mR of the protrusion 102kR of the fixed tube 102.

  In particular, in the method of inserting the fixed reference pin 121, it is difficult to insert the lens barrel 101R of the first embodiment from the front of the lens barrel in the same manner as the lens barrel 1R. Therefore, the fixed reference pin 121 of the second embodiment is press-fitted into the through holes 101Rc and 102mR from the rear of the fixed cylinder 102.

  Next, the eccentric member 120 is assembled into the long groove 101Rb of the lens barrel 101R and the through hole 102aR of the fixed cylinder 102. The reference shaft 120a of the eccentric member 120 is lightly press-fitted into the through hole 102aR, and the eccentric shaft 120b is fitted into the long groove 101Rb with a gap slidable in the longitudinal direction. As in the first embodiment, the lens barrel 101R can be swung with respect to the fixed cylinder 102 by rotating the eccentric member 120.

  By adhering and fixing the eccentric member 120 after the optical axis adjustment operation to the fixed cylinder 102, it is possible to prevent the adjustment position of the lens barrel 101R from being shifted due to a physical impact.

  As described above for the right eye side, as shown in FIGS. 16a and 16b, the same structure is symmetrically arranged on the left eye side, and the structure indicated by the subscript “R” on the right eye side is the subscript on the left eye side. It is expressed by “L”. The lens barrels 101L and 101R perform optical axis adjustment by swinging in different directions around a fixed reference pin 121, which is the center of swing of each of the lens barrels 101L and 101R. Since the optical axis adjustment procedure is the same as that in the first embodiment, the description thereof is omitted. The configuration of the shake correction unit 150 is the same as that of the first embodiment described with reference to FIG.

  In the first and second embodiments, the lens barrels 1L and 1R are configured to swing symmetrically. However, in actuality, it is possible to make adjustments by swinging and displacing in different directions. For example, the lens barrel 1R may be swung in the vertical direction with respect to the plane including the optical axes of the left and right objective optical systems, and the lens barrel 1L may be swung in the parallel direction. Although the binoculars having the shake correction function have been described, it is needless to say that the present invention can be applied to binoculars having no shake correction function.

  Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist thereof.

OL, OR Optical axis of objective optical system
EL, ER Optical axis of eyepiece optical system
L1L, L1R Group of lenses that form part of the objective optical system
L2L and L2R Eccentricity adjustment lenses that form part of the objective optical system
L3L, L3R image stabilization lens group
L4L, L4R Polo II type formation prism
1L, 1R lens holder
50 Stabilization unit
4L, 4R support frame
5L, 5R eyepiece tube
6L, 6R rubber
7L, 7R eyepiece unit
8 Base material
9L, 9R interlocking plate
10 Focus support member

Claims (4)

In binoculars having at least a pair of left and right objective optical systems and a pair of left and right eyepiece optical systems,
A pair of left and right lens holding cylinders for holding part or all of the pair of left and right objective optical systems;
A fixing member for positioning and fixing each of the pair of left and right lens holding cylinders at a predetermined position of the tip;
A pair of left and right reference members forming a reference for positioning each of the pair of left and right lens holding cylinders in a plane perpendicular to the optical axis to the fixed member;
A pair of left and right adjustment members disposed at opposite positions across the optical axes of the pair of left and right lens holding cylinders with respect to each of the pair of left and right reference members;
A combination of a plurality of flange shapes provided on the periphery of the rear end of each of the pair of left and right lens holding cylinders and a plurality of flange shapes provided corresponding to the periphery of the tip of the fixing member constitute a so-called bayonet coupling. by doing,
Positioning the pair of left and right lens holding cylinders at a predetermined position of the fixing member and enabling movement within a plane perpendicular to the optical axis;
The pair of left and right adjustment members is used to adjust the optical axis by swinging the pair of left and right lens holding cylinders in different directions around the pair of left and right reference members as the center of swinging. Binoculars characterized by being positioned with respect to the fixing member. 2. The binoculars according to claim 1, wherein swingable directions around the pair of left and right reference members of the pair of left and right lens holding cylinders are symmetrical on the left and right. The swingable direction around the pair of left and right reference members of the pair of left and right lens holding cylinders is an angle of 45 degrees or less with respect to a plane including both the optical axes of the pair of left and right objective optical systems. The binoculars according to claim 1 or 2, characterized in that. 4. The shake correction is performed by moving a pair of left and right shake correction lens groups forming a part of the pair of left and right objective optical systems integrally in the vertical and horizontal directions. Binoculars according to item.

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