JP2007310006A - Binocular magnifying glass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a binocular magnifying glass capable of suppressing an assembling cost by mitigating the precision of attachment of eyeglass lenses and facilitating the remaking even when a data of a wearer is different from the actual value. <P>SOLUTION: The binocular magnifying glass 1 is constituted by attaching a pair of magnifying optical system units 20A, 20B to a frame 10 that can be fixed to a head part of the wearer and attaching the eyeglass lenses 30A, 30B to the units. The magnifying optical system units are attached position-adjustably to the frame 10 via an adjustment mechanism 40. An attachment interval of the magnifying optical system units is set by performing positional adjustment of second moving frames 42A, 42B with respect to a first moving frame 41 based on a pupil distance (PD) of the wearer. An angle of covergence is set by adjusting rotational positions of the magnifying optical system units with respect to the second moving frames such that optical axes of the left and right magnification optical system units intersect each other on the position of a processing part based on a working distance (WD) of the wearer. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a binocular magnifier for magnifying and observing an object with binocular.

  In an operation for treating a fine tissue such as a brain surgery or a cardiovascular operation, a doctor performs an operation while observing the treatment portion with a magnifier. In such a case, it is desirable to use a binocular magnifier in order to observe the treatment portion in three dimensions. Patent Document 1 discloses a binocular magnifying glass configured by forming circular openings in the central portions of the left and right spectacle lenses fixed to the spectacle frame, and fixing the magnifying optical system unit to these openings. Yes. The magnifying optical system unit includes a real image type magnifying optical system including an objective lens and an eyepiece lens, and a roof prism disposed between the objective lens and the eyepiece lens. The roof prism functions to erect the image formed by the objective optical system and to deflect the optical path so that the wearer can observe the enlarged portion at hand while facing the front.

  Thereby, the doctor can switch between magnified view through the magnifying optical system and equal magnification view through the spectacle lens by moving the line of sight, and in the magnified view, the treatment section without tilting the head forward Can be magnified.

  The spectacle lens is designed according to the spectacle prescription (degree of myopia, hyperopia, astigmatism, etc.) of the doctor to be used. In addition, in order to enable stereoscopic viewing during magnified observation, the pupils of both eyes of the doctor and the exit pupils of the left and right magnified optical system units are matched, and the left and right magnified optical system units are positioned at the position of the treatment section. It is necessary to cross the optical axes. For this reason, the mounting interval of the magnifying optical system unit is determined in accordance with the interpupillary distance (PD), and the convergence angle of both magnifying optical system units is adjusted in accordance with the distance from the binocular magnifier to the treatment section (working distance WD). Set. Since PD and WD differ for each doctor, the manufacturer obtains the mounting position of the magnifying optical system unit based on the data of each doctor and fixes it to the spectacle lens.

Japanese Patent Laying-Open No. 2005-128305 (FIG. 2)

  The mounting accuracy required for general spectacle lenses is about ± 5 mm for position accuracy and ± 5 ° for angle, whereas the mounting accuracy required for the magnifying optical system unit is stricter. ± 0.3 mm to ± 1 mm, and angular accuracy ± 0.1 ° to ± 1 °. In the binocular magnifier disclosed in Patent Document 1, since the magnifying optical unit is attached to the spectacle lens, both the mounting accuracy of the magnifying optical system unit to the spectacle lens and the mounting accuracy of the spectacle lens to the frame are both The strict precision required for the magnifying optical system unit increases the assembly cost.

  Further, when the magnifying optical system unit is fixed to the spectacle lens, it is firmly fixed with an epoxy resin or the like so as not to cause an error after fixing. For this reason, the magnifying optical system unit cannot be easily separated from the spectacle lens with a release agent or the like, and the mounting position of the magnifying optical system unit cannot be changed after completion. Therefore, when the PD and WD obtained at the time of manufacture are different from the actual values, there is a problem that it is necessary to recreate the parts using new parts, which requires cost and time.

  The present invention has been made in view of the above-described problems of the prior art, and can reduce assembly costs by reducing the mounting accuracy of the spectacle lens, and the data of the wearer obtained at the time of manufacture is actually It is an object (problem) to provide a binocular magnifier that can be easily recreated even when the value differs from.

  In order to achieve the above object, a binocular magnifier according to the present invention includes a frame that can be fixed to a wearer's head, and a pair of magnifying optical systems that are attached to the frame and viewed by the left and right eyes of the wearer. It is characterized by comprising a unit and left and right eyeglass lenses respectively attached to the left and right magnifying optical system units.

  In this case, it is desirable to provide an adjustment mechanism for attaching the left and right magnifying optical system units to the frame so that the position can be adjusted. The adjustment mechanism includes a first moving frame attached to the frame so that the position can be adjusted in the vertical direction during wearing, and a pair of first moving frames attached to the first moving frame so that the position can be adjusted in the left-right direction during wearing. It is desirable to provide two moving frames. In this case, the left and right magnifying optical system units are respectively attached to the second moving frame.

  The right and left magnifying optical system units include a deflecting element that deflects the optical path so that the wearer can observe his / her hand while facing the front, the second moving frame has a ring-shaped rim, and the magnifying optical system It is desirable that the unit has a fitting portion that is fitted to the rim so as to be rotatable.

  Each magnifying optical system unit can be configured as a real image type magnifying optical system including an objective lens having a positive power and an eyepiece having a positive power. In this case, the deflection element is preferably an erecting prism that is disposed between the objective lens and the eyepiece lens and erects an image formed by the objective lens.

  According to the present invention, the magnifying optical system unit is attached to the frame, and the spectacle lens is attached to the unit. Therefore, when the magnifying optical system unit is attached to the frame, although strict attachment accuracy is required, When the spectacle lens is attached to the optical system unit, the spectacle lens can be attached with a reduced attachment accuracy required for a general spectacle lens, and therefore, the assembly cost can be reduced as compared with the conventional case.

  Also, since the mounting accuracy is relaxed, the adhesive used when fixing the spectacle lens to the magnifying optical system unit should be weaker than the epoxy resin, and if an adhesive that can be easily peeled off with a release agent is used, Even when the spectacle prescription of the wearer obtained at the time of manufacture is different from the actual value, it can be easily remade using existing parts by exchanging only the spectacle lens.

  Furthermore, when an adjustment mechanism is provided in the attachment portion of the magnifying optical system unit with respect to the frame, adjustment after manufacture becomes possible, and even when the PD and WD of the wearer obtained at the time of manufacture are different from the actual values, it is recreated. It can be used simply by adjusting without any problems.

  Embodiments of a binocular magnifier according to the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a binocular magnifier according to an embodiment, and FIG. 2 is a perspective view of the binocular magnifier according to the embodiment.

  As shown in FIGS. 1 and 2, the binocular magnifier 1 according to the embodiment includes a frame 10 that can be fixed to the wearer's head and a pair that is attached to the frame 10 and is peeked by the left and right eyes of the wearer. Magnifying optical system units 20A and 20B, and left and right spectacle lenses 30A and 30B attached to the left and right magnifying optical system units 20A and 20B, respectively. The magnifying optical system units 20 </ b> A and 20 </ b> B are attached to the frame 10 via the adjustment mechanism 40 so that the position can be adjusted.

  As shown in FIG. 2, the frame 10 has a front part 11 positioned on the front face of the wearer's forehead during wearing, and extends rearward from both ends of the front part 11 so as to sandwich the wearer's temporal region. A side surface portion 12 to be fixed and a connection portion 13 formed to extend downward from the center of the front surface portion 11 are provided. An adjustment mechanism 40 is attached to the front surface of the connecting portion 13 and a nose pad 50 is fixed to the rear surface. Details of the adjustment mechanism 40 will be described later.

  The magnifying optical system units 20A and 20B include a magnifying optical system for magnifying and observing an object. This magnifying optical system will be described next. Here, a left-eye optical system will be described as an example. The optical system for the right eye is the same as that for the left eye except that the left and right sides are inverted, and therefore a duplicate description is omitted.

  As shown in FIG. 3, the optical system of the magnifying optical system unit 20A is provided with an objective lens 21 having a positive power and an eyepiece 22 having a positive power, and is a real image type for magnifying and observing an object. It is composed of a magnifying optical system, and a roof prism 23 that is disposed between the objective lens 21 and the eyepiece lens 22 to deflect the optical path of the magnifying optical system to one side and to deflect the image upright.

  The light from the observation target enters the objective lens 21, passes through the first surface 23a of the roof prism 23 from the objective lens 21, is totally reflected by the second surface 23b, is reflected by the roof surface 23c, and is reflected by the first surface 23a. The light is totally reflected, passes through the second surface 23 b, and reaches the wearer's left eye EL through the eyepiece 22. Thereby, the wearer can magnify and observe the object at hand while facing the front.

  As shown in FIG. 4, the objective lens 21 of the magnifying optical system unit 20A is incorporated in an objective lens barrel 24. The objective lens barrel 24 is screwed into an auxiliary lens barrel 25. The roof prism 23 is screwed into a housing 26 in which the roof prism 23 is incorporated. The eyepiece 22 is incorporated in an eyepiece lens barrel 27, and the eyepiece lens barrel 27 is screwed into the housing 26. A flange 27a is formed on the outer periphery of the eyepiece lens barrel 27 so as to protrude to the outer peripheral side, and a pressing ring 27b is screwed to the eye side. The magnifying optical system unit 20A holds the flange 27a of the eyepiece lens barrel 27 by the adjustment mechanism 40 in a state where the objective lens barrel 24, the auxiliary lens barrel 25, the housing 26, and the eyepiece lens barrel 27 are assembled together. Thus, it is attached to the frame 10.

  The eyeglass lens 30A has an opening 31 as shown in FIG. As shown in FIG. 4, the relay ring 32 is fitted into the opening 31, and the pressing ring 27b of the eyepiece glasses 27 of the magnifying optical system unit 20A is fitted into the relay ring 32 to inject the adhesive 33. A spectacle lens 30A is fixed to the magnifying optical system unit 20A. The eyeglass lens 30B for the right eye is similarly fixed to the magnifying optical system unit 20B.

  Next, the configuration of the adjustment mechanism 40 will be described. As shown in an exploded view in FIG. 6, the adjustment mechanism 40 includes a first moving frame 41 that is attached to the connecting portion 13 of the frame 10 so that the position can be adjusted in the vertical direction during wearing, and the first moving frame 41. On the other hand, a pair of second moving frames 42A and 42B are provided so as to be adjustable in position in the left-right direction during wearing. The left and right magnifying optical system units 20A and 20B are attached to the second moving frames 42A and 42B, respectively.

  The connecting portion 13 is formed with four screw holes 13a in two rows and two stages. The first moving frame 41 is attached to the upper two screw holes from the front surface with screws 43, and the nose pad 50 is attached to the lower two screw holes from the rear surface with screws 51.

  The first moving frame 41 has an arm shape that is long to the left and right, and two long holes 41a that are long in the vertical direction are formed in the center in parallel. Are formed on a straight line. The screw 43 is screwed into the screw hole 13a of the connection portion 13 through the elongated hole 41a in the vertical direction, and fixes the first moving frame 41 to the frame 10 as shown in FIG. Further, in this state, by loosening the screw 43, the position of the first moving frame 41 relative to the frame 10 can be adjusted in the vertical direction during wearing.

  On the other hand, the second moving frames 42A and 42B each have a handle-like holding portion 42a and a ring-shaped rim 42b connected to the lower end of the holding portion. Screw holes 42c are formed at both upper ends of the holding portion 42a. Then, by screwing the screw 44 inserted through the elongated hole 41b in the left-right direction of the first moving frame 41 into the screw hole 42c, the second moving frame 42 is moved to the first moving frame 41 as shown in FIG. Can be fixed against. In this state, the second moving frames 42 </ b> A and 42 </ b> B can be adjusted in the left-right direction with respect to the first moving frame 41 by loosening the screws 44.

  The rim 42b of the second moving frames 42A and 42B is formed with a groove on the inner periphery and is cut at one place on the ear side of the ring, and the cut portion is connected by an adjusting screw 42d. When the adjustment screw 42d is loosened, the diameter of the rim 42b is widened, and when tightened, the diameter is reduced.

  The magnifying optical system unit 20A has a fitting portion that is fitted to the rim 42b so as to be adjustable in rotation. Specifically, the flange 27a formed in the eyepiece lens barrel 27 has a function as the fitting portion. As shown in FIG. 4, the magnifying optical system unit 20A is fixed to the second moving frame 42A by fitting the flange 27a into the inner circumferential groove of the rim 42b and tightening the adjusting screw 42d. Further, by loosening the adjustment screw 42d in this state, the magnifying optical system unit 20A can be rotationally adjusted around the optical axis of the eyepiece lens 22.

  A procedure for adjusting the binocular magnifier 1 so as to be adapted to a specific wearer will be described. First, the spectacle prescription of the wearer (the degree of myopia, hyperopia, astigmatism, etc.), the interpupillary distance (PD), and the distance from the binocular magnifier to the treatment site (working distance WD) are obtained. Then, the eyeglass lenses 30A and 30B are processed according to the eyeglass prescription, and the opening 31 is formed in the center.

  Next, the first moving frame 41 and the nose pad 50 are screwed to the connection portion 13 of the frame 10, and the second moving frames 42 </ b> A and 42 </ b> B are screwed to the first moving frame 41. Then, the left and right magnifying optical system units 20A and 20B are temporarily assembled in the second moving frames 42A and 42B. Thereafter, the screw 43 is loosened, and the position of the magnifying optical system units 20A and 20B in the vertical direction is determined by firing the first moving frame 41 with respect to the frame 10 based on the wearer's data. Set according to. After the setting, the screw 43 is tightened and fixed.

  Next, by loosening the screw 44 and adjusting the positions of the second moving frames 42A and 42B with respect to the first moving frame 41 based on the wearer's PD, the mounting interval of the magnifying optical system units 20A and 20B is worn. Set according to the user. After the setting, the screw 44 is tightened and fixed.

  Furthermore, the adjustment screw 42d is loosened, and the second moving frames 42A and 42B are enlarged so that the optical axes of the right and left enlargement optical system units 20A and 20B intersect at the position of the treatment portion based on the WD of the wearer. By adjusting the rotational positions of the optical system units 20A and 20B, the convergence angles of the two magnifying optical system units 20A and 20B are set according to the wearer. After the setting, the adjusting screw 42d is tightened and fixed.

  Finally, the relay ring 32 is fitted into the opening 31 of the spectacle lenses 30A and 30B manufactured according to the spectacle prescription of the wearer, and is fitted to the holding ring 27b of the eyepiece lens barrel 27 of the magnifying optical system units 20A and 20B. Then, the adhesive 33 is injected and fixed. When the spectacle lenses 30A and 30B are attached to the magnifying optical system units 20A and 20B, the spectacle lenses 30A and 30B are attached with a relaxed mounting accuracy (position accuracy ± 5 mm, angle accuracy ± 5 °) required for general spectacle lenses. Can do. For the bonding, an adhesive 33 is used which has a lower strength than an epoxy resin and can be easily peeled off by a peeling agent.

  The binocular magnifier 1 manufactured as described above is used with the frame 10 attached to the head and the nose pad 50 placed on the nose. When actually used for surgery or the like, when magnifying and observing a hand during surgery, the magnified optical system units 20A and 20B are looked into in a state of facing the front. As a result, it is possible to enlarge and observe the surgical site at hand without tilting the head, and to reduce neck fatigue. When viewing at the same magnification, the surgical site can be observed through the spectacle lenses 30A and 30B by directing the line of sight downward.

  If the wearer's spectacle prescription, PD, and WD are different from the values obtained at the time of manufacture, or if these values change due to changes in physical conditions such as the wearer's visual acuity, the correct values are used. It needs to be adjusted. When it is necessary to replace the spectacle lenses 30A and 30B, the maker creates a spectacle lens based on a new spectacle prescription, removes the existing spectacle lens using a release agent, and replaces it with a new lens.

  When the PD values are different, the screws 44 are loosened and the positions of the second moving frames 42A and 42B are readjusted. Further, when the values of WD are different, the adjustment screw 42d is loosened to readjust the rotational positions of the magnifying optical system units 20A and 20B.

  Thus, since the binocular magnifier 1 of the embodiment has the magnifying optical system units 20A and 20B attached to the frame 10 and the spectacle lenses 30A and 30B attached to the unit, the magnifying optical system units 20A and 20B are attached to the frame 10. However, when mounting the spectacle lenses 30A and 30B to the magnifying optical units 20A and 20B, the mounting required for general spectacle lenses is relaxed. Since it can be attached with accuracy, the assembly cost can be reduced as compared with the prior art.

  Moreover, since the mounting accuracy is relaxed, the adhesive used when fixing the spectacle lenses 30A and 30B to the magnifying optical system units 20A and 20B may be weaker than the epoxy resin, and can be easily peeled off with a release agent. Agents can be used. Therefore, even when the spectacle prescription of the wearer obtained at the time of manufacture is different from the actual value, it can be easily remade using existing parts by exchanging only the spectacle lens.

  Further, since the adjusting mechanism 40 is provided at the attachment portion of the magnifying optical system units 20A and 20B with respect to the frame 10, adjustment after manufacture is possible, and the PD and WD of the wearer obtained at the time of manufacture differ from the actual values. Even in this case, it can be used simply by adjusting without remaking.

It is a front view of the binocular magnifier concerning an embodiment. It is a perspective view of the binocular magnifier of an embodiment. It is a side view which shows the structure of the optical system of the binocular magnifier of embodiment. It is side surface sectional drawing of the binocular magnifier of embodiment. It is a disassembled perspective view which decomposes | disassembles and shows a part of binocular magnifier of embodiment. It is a disassembled perspective view which shows the flame | frame and adjustment mechanism of the binocular magnifier of embodiment. It is a perspective view which shows the frame and adjustment mechanism of the binocular magnifier of embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Binocular magnifier 10 Eyeglass frame 20A, 20B Magnification optical system unit 30A, 30B Eyeglass lens 21 Objective lens 22 Eyepiece 23 Dach prism 24 Objective lens barrel 25 Auxiliary barrel 26 Housing 27 Eyepiece lens barrel 27a Flange (fitting part)
40 adjustment mechanism 41 first moving frame 42A, 42B second moving frame 42b rim 42d adjusting screw

Claims (5)

A frame that can be fixed to the head of the wearer;
A pair of magnifying optical system units attached to the frame and viewed by the left and right eyes of the wearer;
A binocular magnifier comprising left and right eyeglass lenses attached to the left and right magnifying optical system units, respectively.   The binocular magnifier according to claim 1, further comprising an adjustment mechanism that attaches the left and right magnifying optical system units to the frame so as to be position-adjustable.   The adjusting mechanism is attached to the frame so that the position of the first moving frame can be adjusted in the vertical direction during wearing, and to the first moving frame, the position of the adjusting mechanism can be adjusted in the left-right direction during wearing. The binocular magnifier according to claim 2, further comprising a pair of second moving frames, wherein the left and right magnifying optical system units are respectively attached to the second moving frames.   The left and right magnifying optical system units include a deflecting element that deflects an optical path so that a wearer can observe a hand while facing the front, and the second moving frame has a ring-shaped rim, and the magnifying optical unit The binocular magnifier according to claim 3, wherein the system unit has a fitting portion that is fitted to the rim so as to be capable of rotational adjustment.   Each of the magnifying optical system units is a real image type magnifying optical system including an objective lens having a positive power and an eyepiece having a positive power, and the deflection element is disposed between the objective lens and the eyepiece. The binocular magnifier according to claim 4, further comprising an erecting prism arranged and erecting an image formed by the objective lens.