CN113448076B - Binocular magnifier - Google Patents

Abstract

A binocular magnifier is provided which can ensure a focal length optimal for a user at this time with a simple operation. A focus adjustment unit (12) disposed in the eyepiece parts of a pair of left and right magnifier bodies (2) of a binocular magnifier (10) is provided with a focus adjustment lens (11) and a holding ring (14) made of a magnetic material in which the focus adjustment lens (11) is fitted. The holding ring (14) is assembled in contact with a correction lens (45) constituting an optical system in the magnifying glass main body (2), and is attracted and held by the magnet ring (16). Thus, the focus adjustment lens (11) can be easily replaced by being detachably attached to the magnifying glass main body (2), and the most suitable focal length can be ensured.

Description

Binocular magnifier

Technical Field

The present invention relates to a binocular magnifier used in medical surgery and precision work.

Background

Binocular magnifiers are widely used in various fields such as medical fields, precision work, and precious stone processing as a method for magnifying a local object to be visually recognized at hand. In these fields, high precision is required for work and operation, and a binocular magnifier has a bright and clear image quality in addition to an excellent resolution, a wide field diameter, a predetermined focal length, and the like. In addition, the magnification adjustment of the magnifier is also prepared in a type that can be adjusted in accordance with the application.

Moreover, in particular, for binocular magnifiers used in the medical field, since life is critical, it is required that vision correction and astigmatism correction of the binocular magnifier are accurately adapted to the vision of the operator.

However, in the conventional binocular magnifier, although high accuracy is required for manual work of a medical operator, there is a problem that the focal length of a lens for correcting the vision of the operator at a distance or at a near distance cannot be matched with the vision of an operator who is changing during the work, and thus the vision accuracy is uneven due to the change of the vision. That is, although human eyesight varies frequently according to the physical condition and the degree of fatigue, and also varies in the morning and afternoon even on the same day, conventional binocular magnifiers cannot be applied to the varying eyesight of the operator, and the operator has to use the binocular magnifier to perform the operation in a state of improper eyesight.

In addition, since the distance between the operation site and the binocular magnifier needs to be changed according to the type of operation (for example, operation in a narrow field of view or operation in a wide field of view), it is necessary that one operator prepares a plurality of types of binocular magnifier having different focal lengths in advance.

The present invention has been made in view of the above-described problems, and an object thereof is to provide a binocular magnifier capable of ensuring an optimal focal length for a wearer by a simple operation of attaching and detaching only a focus adjustment lens.

In order to solve the above-described problems, the present invention provides a binocular magnifier including an optical system for magnifying an object to be observed, the magnifier including a pair of magnifier bodies and a focus adjustment section disposed on an eyepiece section of the magnifier bodies, wherein the focus adjustment section includes a focus adjustment lens having a magnetic body at a peripheral edge thereof and a retaining ring into which the focus adjustment lens is fitted, and the focus adjustment lens is detachably retained on the magnifier bodies by being attracted to the magnet by the magnetic body.

In one embodiment, the magnet has a ring shape, and is fitted into the magnifier body so as to be in contact with the inner peripheral edge of the eyepiece portion of the magnifier body.

In another embodiment, the lens holder is provided with a holding ring having an inner diameter substantially equal to an outer diameter of the focus adjustment lens, the holding ring being disposed so as to contact with a peripheral edge of an inner side of the eyepiece portion, the magnet ring being provided with a lens receiving portion having an inner diameter substantially equal to an outer diameter of the focus adjustment lens, and a pressing portion having an inner diameter smaller than an outer diameter of the focus adjustment lens, and the lens receiving portion cooperates with the holding ring fitted to the magnifier body so as to contact with the peripheral edge of the eyepiece portion, thereby holding the focus adjustment lens.

The magnetic body may be formed of a metal ring into which the focus adjustment lens is fitted.

Alternatively, the magnetic material may be formed of a thin film formed of fine particles of a magnetic material having a small particle diameter coated or sprayed on the surface or a thin film of a magnetic material formed by sputtering or vapor deposition.

In another embodiment, the focus adjusting unit and the binocular magnifier are provided as a detachable binocular magnifier, respectively, by: the magnifier comprises a cylindrical bracket inserted into the eyepiece side end of the magnifier body, wherein a 1 st mounting part for detachably holding the focus adjustment part is arranged at one end of the bracket, a 2 nd mounting part for detachably holding the magnifier body is arranged at the other end of the bracket, the 1 st mounting part comprises the magnet for adsorbing the magnetic body of the focus adjustment lens, the bracket is arranged at left and right rims of an eyeglass frame, and the bracket is respectively embedded and fixed in holes formed in a carrier lens for holding the bracket.

In the 1 st mounting portion, the magnet is constituted by pins disposed at equal intervals on a peripheral edge of an end surface of the holder to which the focus adjustment portion is mounted, the holding ring has a hole portion into which the pins are inserted, and the focus adjustment portion attracts the magnetic body of the focus adjustment lens to be mounted to the holder via the 1 st mounting portion by inserting the pins into the hole portion.

Thus, the focus adjustment unit is provided with a plurality of types of adjustment units having different focal lengths based on the focus adjustment lens, one of which is selected and attached to the holder via the 1 st attachment unit.

The 2 nd mounting portion is formed of a hook-shaped groove including an insertion hole and a locking hole formed on the insertion side of the magnifier body of the bracket, and a protrusion formed on a side surface of the magnifier body is fitted into the locking hole via the insertion hole, so that the magnifier body is mounted to the binocular magnifier.

Here, the magnifying glass main body is prepared by selecting one of a plurality of types of magnifying glass main bodies having different magnifications, and is attached to the holder via the 2 nd attachment portion.

According to the binocular loupe of the present invention, a focal length suitable for the wearer at this time can be easily ensured by a simple operation of inserting the focus adjustment lens into the loupe body. Therefore, there is no need to provide a plurality of focus adjustment portions according to the focal length, and an inexpensive binocular magnifier can be provided.

Drawings

Fig. 1 is a block diagram showing the whole of a binocular magnifier according to an embodiment of the present invention.

Fig. 2 schematically illustrates a structure of an optical system of a binocular magnifier according to an embodiment of the present invention.

Fig. 3 is an explanatory view showing a state in which an operation of wearing the binocular magnifier is performed.

Fig. 4 shows an explanatory diagram about the lower fitting angle r when the magnifying lens is mounted to the carrier lens.

Fig. 5 shows an explanatory diagram concerning the inner fitting angles p, q when the magnifying glass is mounted to the carrier lens.

Fig. 6 shows an explanatory view of a magnifier attached to a carrier lens from the eyepiece side.

Fig. 7 shows a part of the eyepiece side of the magnifier main body and the focus adjustment section according to one embodiment in a sectional side view, (a) shows the focus adjustment section in a disassembled state, and (b) shows the focus adjustment section in a state of being incorporated into the eyepiece side of the magnifier main body.

Fig. 8 shows a part of the eyepiece side of the magnifier main body and a focus adjustment section according to another embodiment in a sectional side view, (a) shows the focus adjustment section in a disassembled state, and (b) shows the focus adjustment section in a state of being incorporated into the eyepiece side of the magnifier main body.

Fig. 9 shows an overall structure diagram of another type of binocular magnifier to which the present invention is applied.

Fig. 10 shows a structure of a binocular magnifier according to embodiment 2 of the present invention.

Fig. 11 is an explanatory view showing a state in which the binocular magnifier of fig. 10 is turned upside down and one magnifier body is detached.

Fig. 12 is an assembled configuration view of the magnifier body, the bracket and the focus adjustment section in the binocular magnifier of fig. 10.

Fig. 13 is a plan view showing a holder and a focus adjustment unit in cross section, in which the magnifier main body, the holder and the focus adjustment unit in the binocular magnifier of fig. 10 are combined.

Fig. 14 is a side view showing the structure of the 2 nd mounting portion in the binocular loupe of fig. 10.

Fig. 15 shows an explanatory view of an underlying assembly angle when the bracket is mounted to the carrier lens in the binocular loupe of fig. 10.

Fig. 16 shows an explanatory view about an inner fitting angle at the time of mounting the bracket to the carrier lens in the binocular loupe of fig. 10.

Fig. 17 is a side view showing another configuration example of the 1 st and 2 nd attachment portions in the binocular loupe of fig. 10.

(symbol description)

1: a spectacle frame; 2: a magnifying glass body; 10: binocular magnifier; 10A: binocular magnifier; 11: a focus adjustment lens; 12: a focus adjustment unit; 12A: a focus adjustment unit; 14: a retaining ring; 16: a magnet ring; 21: a spectacle frame; 22: a lens receiving section; 23: a pressing part; 103: a bracket; 103b: magnet cover (1 st mounting part); 105: a focus adjustment unit; 105a: a focus adjustment lens; 105b: a retaining ring; 105c: a loading/unloading ring (magnetic body); 114: groove (2 nd mounting portion).

Detailed Description

The binocular magnifier is formed by attaching magnifier bodies of left and right eyes to a spectacle frame and a headband, respectively. In addition, there are 2 types of binocular magnifier in which a magnifier body is attached to a spectacle frame, namely, directly supported by the spectacle frame and fitted into a hole bored in a spectacle lens (carrier lens).

The present invention can be applied to any of the above-described binocular magnifiers, but a binocular magnifier formed by attaching a magnifier to a carrier lens will be described in detail below with reference to the drawings.

The binocular magnifier 10 shown in fig. 1 includes a spectacle frame 1, a magnifier body 2 corresponding to the left and right eyes for magnifying an image of a work object, and left and right carrier lenses 5 for mounting the magnifier body 2.

The eyeglass frame 1 has substantially the same structure as usual eyeglasses, and includes an edge ring 1A into which a carrier lens 5 is fitted, and a temple portion 6 that is hung on an ear of an observer. As a material constituting the eyeglass frame 1 and the temple portion 6, a metal such as titanium, a synthetic resin, or the like which is less likely to rust and has elasticity is used.

The material of the carrier lens 5 constituting the rim 1A fitted to each of the eyes is not necessarily transparent, but is preferably transparent in order to enlarge the visual field of the observer in the direction of the hand, and a correction lens is used when vision correction is required, but may be a simple transparent glass when vision correction is not required. The material of the lens in this case is glass or plastic.

As shown in fig. 2, the objective lens group 41 and the eyepiece group 42 are arranged along the central axis (optical axis) of the barrel in the lens barrel with respect to the magnifier main body 2. The objective lens group 41 is provided with prisms 40a and 40b for refracting incident light so that the image quality is not reduced even if the magnification is increased. A correction lens (dioptric lens) 45 for correcting the vision of the user of the binocular magnifier 10 is disposed at the eyepiece side end of the magnifier body 2, but if the vision correction is not necessary, these optical systems in the magnifier body 2 are protected by disposing a simple glass lens instead of the correction lens 45.

Although not shown in detail, the ring 3 (fig. 1) provided on the outer periphery of the magnifier body 2 is rotated to move the lens 43 of the objective lens group 41 and the lens 44 of the eyepiece lens group 42 in the optical axis direction, so that the image angle of the magnifier body 2 can be adjusted in the range of, for example, 3.3 to 4.8 times. Further, as the magnifier body 2, an example in which the distance between lenses is completely fixed and the image angle is a constant magnification can also be used.

The leg portion 6 of the binocular loupe 10 is hung on the ear of the user and worn on the face. As shown in fig. 3, when a surgeon uses the left and right magnifier bodies 2 to magnifie and observe a target object at a surgical site P at the distal end of a hand-held surgical instrument, the surgeon views the left and right magnifier bodies 2 to lower the line of sight and gaze at the surgical site P.

Therefore, as shown in fig. 4, the left and right magnifier bodies 2 are mounted obliquely with respect to a vertical line V perpendicular to the plane of the carrier lens 5. The inclination angle is mounted so as to be inclined at an angle r (lower fitting angle) downward with respect to the vertical line V. The left and right magnifier bodies 2 are attached so as to be inclined at an angle P and an angle q (inside attachment angle) respectively toward a center line L connecting the center O of the eyeglass frame 1 and the blade portion P as shown in fig. 5 in the horizontal direction.

In this way, the magnifier body 2 is fixed to the carrier lens 5 in a state of maintaining the inclination of the lower assembly angle r and the inner assembly angles p, q when being fitted in the hole dug out in the carrier lens 5. In this way, the binocular magnifier 10 is manufactured by processing the lower mounting angle r and the inner mounting angles p and q according to the respective users, and the users can easily observe the observation target portion by adjusting the magnification of the magnifier main body 2.

The lower fitting angle r and the inner fitting angles p and q are measured in advance according to the posture of the user of the binocular magnifier 10 in the work, the appearance of the face such as the interpupillary distance (PD), and the like. As a measurement method for this case, there are various methods such as actually reproducing the work posture by the user and actually measuring the work posture with a ruler, and japanese patent No. 5652973 and japanese patent No. 5311601 disclose a method of measuring based on an image obtained by photographing the work posture of the operator.

The correcting lens 45 is arranged on the binocular magnifier 10 to correct the long-distance or short-distance vision of the user, but the correcting lens 45 may be inappropriate because the vision varies according to the physical condition or environment. Therefore, when the correction lens 45 becomes temporarily inappropriate, the user fits the focus adjustment lens 11 to the eyepiece side of the magnifier body 2 as shown in fig. 6, thereby matching the focal length with the varied vision. On the other hand, even if a user who normally forms the lens 45 from a glass lens without correcting his/her eyesight, the focal length is matched by using the focus adjustment lens 11 when the eyesight is changed.

The focus adjustment lens 11 is fitted to the eyepiece portion of the magnifier main body 2 through a focus adjustment section 12. Fig. 7 shows a configuration of the magnifier body 2 and the focus adjustment section 12, wherein the focus adjustment section 12 includes the focus adjustment lens 11, the holding ring 14, and the magnet ring 16 into which the focus adjustment lens 11 is fitted.

The focus adjustment lens 11 has a magnetic body 11a formed on the periphery. The magnetic body 11a is formed on the surface of the periphery of the magnet ring 16 by coating or spraying fine particles of a magnetic material having a small particle diameter on the surface and magnetizing the fine particles. Alternatively, a thin film of a magnetic material may be formed on the surface by sputtering, vapor deposition, or the like. As the magnetic material, iron oxide/chromium oxide/cobalt/ferrite/neodymium and the like which do not contain impurities are used.

The magnetic body 11a may be formed of a ring of a magnetic body such as stainless steel. In this case, the focus adjustment lens 11 is fitted into the annular ring of the annular magnetic body 11a and fixed. In order to protect the outer surface of the magnetic body 11a, it is preferable to perform a surface treatment with an epoxy coating or the like in advance.

The magnet ring 16 has an inner diameter substantially equal to the outer diameter of the focus adjustment lens 11 having the magnetic body 11a at the periphery, and an outer diameter substantially equal to the inner diameter of the barrel of the magnifier main body 2. Therefore, the magnet ring 16 is inserted into the barrel of the magnifier body 2.

The retaining ring 14 is made of metal and is attracted by the magnet ring 16. The magnet ring 16 is formed of a ring having an inner diameter substantially equal to the outer diameter of the focus adjustment lens 11. Further, at the peripheral edge of the holding ring 14, a male screw 31 is formed to engage with a female screw 30 cut into the inner peripheral wall of the opening side of the barrel of the magnifier main body 2.

Therefore, when the focus adjustment unit 12 is disposed on the eyepiece portion of the magnifier main body 2, as shown in fig. 7 (a), the magnet ring 16 is first inserted from the opening of the magnifier main body 2 on the eyepiece side until it contacts the correction lens 45, and then the holding ring 14 is inserted from the opening while rotating the screw. Thereby, the magnet ring 16 is fixed in contact with the correction lens 45.

Next, the focus adjustment lens 11 is inserted into the barrel of the magnifier body 2, and in this case, the inner diameters of the magnet ring 16 and the holding ring 14 are identical to the outer diameter of the focus adjustment lens 11, so that the user can move the focus adjustment lens 11 into contact with the correction lens 45 within the annular rings of these rings 14 and 16 as shown in fig. 7 (b). Then, the focus adjustment lens 11 is held in the magnifier main body 2 by the attraction of the magnet ring 16 and the magnetic body 11a. Therefore, the user can view the image of the observation target object transmitted through the optical system of the magnifier main body 2 by peeping through the focus adjustment lens 11.

Since the holding ring 14 is made of metal attracted by the magnet ring 16, the focus adjustment section 12 and the magnifier main body 2 are reliably connected.

As described above, the focus adjustment unit 12, the magnet ring 16, and the holding ring 14 are fixedly attached to the inside of the magnifier body 2, and only the focus adjustment lens 11 moves in the annular ring of the magnet ring 16 and the holding ring 14, so as to be detachable from the magnifier body 2. Therefore, when the focal length of the magnifying glass main body 2 becomes inappropriate, the user can easily correct the vision by selecting the focal length adjusting lens 11 most suitable for myopia and hyperopia corresponding to the vision at that time and inserting it into the magnifying glass main body 2, by preparing a plurality of focal length adjusting lenses 11 having different degrees for compensating the vision variation in advance as the accessory of the binocular magnifying glass 10.

Other embodiments of the focus adjustment unit will be described. The focus adjustment unit 12A of fig. 8 includes the same focus adjustment lens 11 and the retaining ring 14 as the focus adjustment unit 12. Therefore, the focus adjustment lens 11 has a magnetic body 11a attracted by a magnet at the periphery, and a male screw 31 that engages with a female screw 30 cut into the inner peripheral wall of the opening side of the barrel of the magnifier body 2 is formed at the periphery of the holding ring 14.

However, in the case of the focus adjustment section 12A, the magnet ring 16A has a two-stage structure including a lens receiving section 22 having an inner diameter substantially equal to the outer diameter of the focus adjustment lens 11 and a pressing section 23 having an inner diameter smaller than the outer diameter of the focus adjustment lens 11, unlike the shape of the magnet ring 16 of the focus adjustment section 12.

When the focus adjustment unit 12A is disposed on the eyepiece portion of the magnifier main body 2, as shown in fig. 8 (a), the holding ring 14 is first inserted while rotating the screw from the opening on the eyepiece side of the magnifier main body 2, and then the focus adjustment lens 11 is moved while being fitted into the annular ring of the holding ring 14, and is brought into contact with the correction lens 45. Thereby, the focus adjustment lens 11 is held by the holding ring 14 fastened and fixed by screw.

Next, the magnet ring 16A is brought into contact with the eyepiece portion of the magnifier main body 2 so that the focus adjustment lens 11 is accommodated in the lens receiving portion 22. Therefore, the magnetic body 11a is attracted to the magnet ring 16A and the holding ring 14, and the focus adjustment lens 11 is held in the magnifier main body 2 by being pressed toward the holding ring 14 by the pressing portion 23 of the magnet ring 16A. The user looks at the focus adjustment lens 11 through the opening of the magnet ring 16A, and observes the image of the observation target object through the optical system of the magnifying glass main body 2.

Therefore, in the focus adjustment unit 12A, the most suitable focus adjustment lens 11 is selected from among the focus adjustment lenses 11 having different powers prepared in advance for compensating for the change in vision, and is inserted into the magnifier main body 2, and the magnet ring 16A is attached so that the inserted focus adjustment lens 11 is accommodated in the lens receiving unit 22, whereby the user can correct the vision.

In addition, as in the case of the focus adjustment unit 12, the holding ring 14 is made of metal attracted by the magnet ring 16, so that the focus adjustment unit 12A and the magnifier main body 2 are reliably connected.

As described above in detail, with regard to the focus adjustment units 12 and 12A according to the present invention, if various focus correction lenses 11 having different focal lengths are prepared in advance for correcting the long-distance or short-distance vision, the installer of the binocular magnifier 10 selects the focus adjustment lens 11 matching the vision at that time and installs it on the eyepiece portion of the magnifier body 2 when the installer wants to change to an appropriate focal depth according to the state of the vision at that time, the state of surrounding brightness, or the task performed in the sitting position or standing position. Accordingly, the binocular magnifier 10 is provided which can be adjusted to the most suitable focal length by only assembling the focus adjustment lens 11.

The invention can also be applied to a binocular magnifier without a carrier lens as described above, an example of which is shown in fig. 9. In the binocular magnifier 10A, a magnifier body 20 having a pair of left and right magnifier bodies 25 is suspended from a spectacle frame 21 by a rotatable shaft 23. The magnifier body 20 can be moved to the left and right in the slit 26 according to the position of the magnifier body 25 in the up-down direction and the interpupillary distance of the observer by adjusting the screw 24. The magnifier body 25 is rotatably supported by a vertical shaft of the screw 24, and the inner mounting angle can be adjusted. The lower mounting angle of the magnifier body 25 can be adjusted by rotating the magnifier body 25 about the shaft 23 as a fulcrum.

Further, the magnifying glass main body 25 can be provided with any of the focus adjustment sections 12 and 12A including the focus adjustment lens 11. In addition, in this type of binocular magnifier, there is a type in which the corrective lens 27 is attached to the eyeglass frame without providing the corrective lens 45 as shown in fig. 2, in which case the observer peeks through the focus adjustment lens 11 via the corrective lens 27 into the magnifier body 25.

In the binocular magnifier 10A of the type in which the magnifier is not mounted to the carrier lens in this way, the interpupillary distance, the inner mounting angle, and the lower mounting angle are not fixed and can be arbitrarily adjusted. The magnifying glass main body 20 may be configured to be supported by a head strap instead of being suspended from the eyeglass frame 21.

Next, embodiment 2 of the present invention will be described. The binocular magnifier 100 shown in fig. 10 and 11 includes: a spectacle frame 101; a magnifier body 102 corresponding to the left and right eyes for magnifying an image of a work object; a pair of holders 103 each holding the magnifying glass main body 102; a left and right carrier lens 104 for attaching the mount 103 to the eyeglass frame 101 as a magnifier support member; and a left and right focus adjustment part 105 for securing the eyesight of the user.

The eyeglass frame 101 has substantially the same structure as that of ordinary eyeglasses, and includes an edge ring 101a in which a carrier lens 104 is fitted, a temple 101b that is hung on an ear of an observer, a bridge 101c that connects the edge rings 101a, and a nose pad 106. As a material constituting the eyeglass frame 101, a metal such as titanium, a synthetic resin, or the like which is less likely to rust and has elasticity is used. Further, a shielding member 107 for protecting both sides of the face of the wearer and a band 108 for holding the binocular magnifier 100 in a worn state can be attached to the temple 101b as needed.

The carrier lens 104 is inserted through an opening provided with a support bracket 103, and the bracket 103 holds the magnifier body 102 and the focus adjustment section 105 at both ends thereof, and the bracket 103 is fitted into the opening so as to be fixed in a state of maintaining a predetermined angle with respect to the surface of the carrier lens 104. The material constituting the carrier lens 104 is not necessarily transparent, but is preferably transparent to expand the visual field of the observer in the direction of the hand, and a correction lens is used when vision correction is required, but may be a simple transparent glass when vision correction is not required. In this case, the lens is made of glass or plastic. Therefore, the carrier lens 104 has a function of supporting the magnifying glass supporting member of the magnifying glass main body, and also has a function of correcting vision as needed.

The magnifying glass main body 102 houses an optical system that adjusts an image of an observation target at a predetermined magnification (for example, a magnification of 2.5 times) in the same manner as the optical system described in fig. 2.

As shown in fig. 12, the holder 103 includes a holder body 103a as a bottomed cylindrical body and a magnet cover 103b. The holder body 103a has an inner diameter substantially equal to the outer diameter of the eyepiece tube 102a of the magnifier body 102, and a through hole 121 is provided in the center of the bottom 120 serving as a receiving portion of the magnifier body 102 to be inserted. As shown in the cross-sectional view of fig. 13, a step is formed at the peripheral edge of the bottom 120 where the through hole 121 is formed, and a circular transparent plate 122 for closing the through hole 121 is fitted into a portion having a large diameter of the step. At the bottom 120 of the holder body 103a, pins 123 formed of 5 cylindrical neodymium magnets are implanted at equal intervals along the circumferential direction so as to protrude outward in the axial direction, and are connected by grub screws 122. The magnet cover 103b is formed of a ring that abuts against the periphery of the bottom 120 of the holder body 103a, and 5 recesses 124 that are fitted with the 5 pins 123 are provided on the abutment surface. The magnet cover 103b is a 1 st mounting portion for mounting the focus adjustment portion 105 to the holder 103.

The focus adjustment unit 105 includes a focus adjustment lens 105a, a holding ring 105b holding the focus adjustment lens 105a, and a detachable ring 105c formed of a magnetic material. The retaining ring 105b having a ring shape has a circular protrusion on its circumferential surface. The inner diameter of the projection is substantially equal to the inner diameter of the focus adjustment lens 105a, and the focus adjustment lens 105a is fitted into and held by the circular projection. The inner diameter of the attachment/detachment ring 105c is substantially equal to the outer diameter of the circular protrusion, and the protrusion is fitted into the attachment/detachment ring 105c. Therefore, a magnetic body (attachment/detachment ring 105 c) attracted to the latch 123 via a projection is provided on the periphery of the focus adjustment lens 105a.

The focus adjustment lens 105a is a lens for correcting a distance or a near distance, which is used as necessary in accordance with the magnifying glass body 102, in order to correct the vision when the user of the binocular magnifying glass 100 magnifies the observation object through the left and right magnifying glass bodies 102. Therefore, a plurality of focus adjustment units 105 each including a focus adjustment lens 105a having a different focal length are prepared in advance, and when it is desired to adjust the focus of the observation target passing through the magnifying glass main body 102, the focus adjustment unit 105 is removed by releasing the coupling of the attachment/detachment ring 105c and the plug 123, so that the focus adjustment unit 105 having an appropriate focal length can be exchanged. As described above, the binocular magnifier 100 according to the present embodiment replaces the focus adjustment lens 105a by replacing the focus adjustment section 105.

As shown in fig. 14, the holder body 103a is provided with a hook-shaped groove 114 having an insertion hole 114a formed along the insertion direction of the magnifying glass body 102 and a locking hole 114b formed continuously with the insertion hole 114a in a direction orthogonal to the insertion direction. Further, a protrusion 113 fitted into the groove 114 is provided on the outer surface of the eyepiece barrel 102a of the magnifier main body 102. Thus, when the eyepiece tube 102a is inserted into the holder 103, the projection 113 is fitted into the locking hole 114b by allowing the projection 113 to enter the insertion hole 114a and then rotating the magnifier body 102, and the magnifier body 102 is attached to the holder 103. Accordingly, the groove 114 becomes a 2 nd mounting portion for mounting the magnifier body 102 to the bracket 103.

In this way, since the engagement between the groove 114 of the holder 103 and the projection 113 of the magnifier body 102 is detachable, the magnifier body 102 can be detached from the holder 103 and exchanged for another magnifier body 102 when it is desired to exchange the magnifier body 102 with a magnifier body 102 having a different magnification. Therefore, when it is necessary to change the magnification according to the observation target of the work operation area W, the magnifying glass main body 102 can be replaced with the magnification corresponding thereto.

The holder 103 is fitted into the opening formed through the carrier lens 104, and the magnifying glass body 102 is fixed at a predetermined angle to the surface of the carrier lens 104. That is, in the binocular magnifier 100, since the magnifier body 102 is detachably provided, the magnifier body 102 attached to the bracket 103 is attached to the bracket 103 at a predetermined lower attachment angle r and inner attachment angles p and q with respect to the plane of the carrier lens 104 so that the magnifier body 102 is focused on the observation target portion.

If the holder 103 is fixedly attached to the carrier lens 104 at the lower attachment angle r, when the user takes a forward tilting posture during work, as shown in fig. 15, the optical axis of the left and right magnifier main bodies 102 matches the height position of the work position P. Further, by fixedly attaching the holder 103 to the carrier lens 104 at the inner attachment angles P, q, as shown in fig. 16, the optical axes of the left and right magnifier bodies 102 are gathered to the working position P.

When the lower fitting angle r and the inner fitting angles p, q of the bracket 103 are determined, openings into which the bracket 103 is inserted are provided in the left and right carrier lenses 104 at positions corresponding to pupils of both eyes, and the bracket 103 is fixed by an adhesive or the like so that the bracket 103 on the left side protrudes from the surface of the carrier lens 4 at the lower fitting angle r and the inner fitting angle p. The binocular magnifier 100 is used by attaching the magnifier body 2 and the focus adjustment section 5 to the 1 st and 2 nd attachment sections of the bracket 3, respectively.

As described in detail above, the binocular magnifier 100 fixes the bracket 103 to the carrier lens 104, the focus adjustment section 105 is detachably provided by the magnet cover 103b as the 1 st mounting section provided on the opposite side of the bracket 103, and the magnifier body 102 is detachably provided by the groove 114 as the 2 nd mounting section provided on the eyepiece side of the bracket 103. Therefore, when the magnification is changed according to the observation object of the work operation area W, the magnifying glass main body 2 can be replaced with the magnification corresponding thereto. In addition, in the case of correcting vision, the focus adjustment section 105 can be replaced with an appropriate focal length. The magnifying glass main body 102 may have a zoom function capable of adjusting magnification by itself. In this case, a plurality of magnifier bodies 2 capable of adjusting magnification in different ranges are prepared in advance, and the magnifier body 102 having a desired magnification in an adjustable range is replaced.

The 1 st mounting portion is not limited to the mounting by the attraction of the magnet, and may be a fitting structure using a groove and a projection as in the 2 nd mounting portion, and conversely, the 2 nd mounting portion may be a mounting by the attraction of the magnet.

Fig. 17 shows a modification of the 1 st mounting portion and the 2 nd mounting portion connected by screw. The 1 st mounting portion 116 is formed on the outer periphery of the end portion of the holder 103 on the connection side with the focus adjustment portion 105, and is formed of a screw portion screwed with an internal screw formed on the inner periphery of the focus adjustment portion 105. The 2 nd attachment portion 115 is formed on the inner periphery of the holder 103, and is formed of a screw portion screwed with an external screw formed on the outer periphery of the eyepiece barrel 102a of the magnifier main body 102.

[ INDUSTRIAL APPLICABILITY ]

The present invention relates to a binocular magnifier used in medical surgery and precision work, and more particularly to a binocular magnifier which can be easily adjusted to a focal length corresponding to a user's varying vision, and which is industrially applicable.

Claims (6)

1. A binocular magnifier for magnifying an observation object at hand, comprising:

a spectacle frame;

a pair of magnifier bodies having an optical system therein;

a focus adjustment unit including a focus adjustment lens for adjusting a focal length of the magnifying glass main body;

a cylindrical bracket, into which the eyepiece side end of the magnifier main body is inserted;

a 1 st mounting portion provided at an end portion of the holder opposite to a side into which the magnifying glass main body is inserted, the focus adjusting portion being detachably held;

a 2 nd mounting portion provided on the holder and detachably holding the inserted magnifying glass main body; and

left and right carrier lenses for mounting the bracket to an eyeglass frame having a rim into which the carrier lenses are fitted as a magnifier support member,

the focus adjustment part comprises a focus adjustment lens, a holding ring in which the focus adjustment lens is fitted, and a detachable ring formed of a magnetic material, wherein in the 1 st mounting part, a magnet is formed by pins arranged at equal intervals on the periphery of the end surface of the bracket to which the focus adjustment part is mounted, the holding ring has a hole portion into which the pins are inserted, the focus adjustment part is mounted to the bracket via the 1 st mounting part by inserting the pins into the hole portion, the holding ring has a circular protrusion on its peripheral surface, the inner diameter of the protrusion is substantially equal to the inner diameter of the focus adjustment lens, the focus adjustment lens is fitted into and held in the circular protrusion, the inner diameter of the detachable ring is substantially equal to the outer diameter of the circular protrusion, the protrusion is fitted into the ring, the ring that is attached to and detached via the pins is provided on the periphery of the focus adjustment lens,

the focus adjustment lens is detachably held by the magnifying glass main body by being attracted to the magnet by the attachment/detachment ring,

the carrier lens is provided with an opening penetrating through the lens body, the lens body and the focus adjusting section are held by the lens body and the lens body, and the lens body is fixed to the lens body by being fitted into the opening so as to maintain a predetermined angle with respect to the surface of the lens body.

2. The binocular loupe of claim 1, wherein,

the 2 nd mounting portion is formed of a hook-shaped groove including an insertion hole and a locking hole formed in an insertion side of the magnifying glass main body of the holder, and is fitted into the locking hole via the insertion hole by a protrusion formed in a side surface of the magnifying glass main body to connect the holder and the magnifying glass main body.

3. The binocular loupe of claim 1, wherein,

the 2 nd attachment portion is formed of an internal thread portion formed on an inner periphery of an end portion of the holder on the insertion side of the magnifier body, and connects the magnifier body and the holder by screwing with an external thread portion formed on an eyepiece side end of the magnifier body.

4. A binocular magnifier according to any one of claims 1 to 3, wherein,

the magnifying glass body is prepared in advance in a plurality of types, one of which is selected based on the different magnification of the optical system, and is attached to the holder via the 2 nd attachment portion.

5. The binocular loupe of claim 1, wherein,

the 1 st mounting portion is formed on the outer periphery of the end portion of the bracket on the side connected to the focus adjustment portion, and is formed of a screw portion screwed with an internal screw formed on the inner periphery of the focus adjustment portion.

6. The binocular loupe of claim 1 or 5, wherein,

the focus adjustment unit may be configured to select one of a plurality of types of focus adjustment lenses having different focal lengths, and to be attached to the holder via the 1 st attachment unit.