JP2017227743A - Binocular loupe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a binocular loupe capable of easily attaching/detaching a focus adjustment lens for correcting vision of a user.SOLUTION: A lens cap 12 has a lens holding section 15 which has a through-view hole 14 having a diameter smaller than a diameter on an eyepiece side of a loupe 2 on a bottom of a cap body 13 of a bottomed cylindrical body, is annularly provided so as to surround the through-view hole 14 and holds a focus adjustment lens 11. When the eyepiece side of the loupe 2 of a binocular loupe 10 is covered with the cap body 13, a plurality of ribs 17 provided on the inner peripheral surface of the body of the cap body 13 in an axial direction at equal intervals press the outer peripheral surface of the loupe 2, and thereby the lens cap 12 is fixed to the loupe 2, and the focus adjustment lens 11 is held so as to match a correction lens 18 on the eyepiece side of the loupe 2.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a binocular loupe used in medical surgery and precision work, and relates to a binocular loupe in which a focusing lens can be attached to an eyepiece portion of the binocular loupe.

  Conventionally, binocular loupes have been widely used in various fields such as the medical field, precision work, and jewelry processing as a means for enlarging and visually observing a local visual object at hand (operation or operation location). In these fields, high precision is required for work and operation, and the binocular loupe has a bright and clear image quality in addition to excellent resolution, wide field diameter, predetermined focal length, and the like. There is also a type of magnifying lens that can be adjusted to suit the application.

  In particular, since binocular loupes used in the medical field are related to human life, the vision correction and astigmatism correction of the binocular loupe must be precisely adapted to the eyesight of the practitioner at a long or short distance. Is required.

  However, in such a conventional binocular loupe, although high precision is required for the manual operation of the precision practitioner, the focal length of the lens that corrects the visual acuity of the practitioner is set at the time of the practitioner's occasional work. Since it is difficult to appropriately adapt to the visual acuity of the operator, there is a problem that the visual accuracy is uneven due to a change in visual acuity during the operation of the practitioner. In other words, human visual acuity always changes according to physical condition and degree of fatigue, and the conventional binocular loupe adapts to the changing visual acuity of the practitioner even though it changes between morning and afternoon even on the same day I was forced to work with a binocular loupe with inadequate vision.

  In addition, since it is necessary to change the distance between the treatment / operation point and the binocular loupe according to the type of treatment, for example, treatment of a narrow visual field range or treatment of a wide visual field range, It was necessary to prepare different types of binocular loupes.

  In order to solve such problems, conventionally, multiple types of focus adjustment units with different focal lengths are prepared in advance, and one of them can be selected and attached to the eyepiece of the binocular loupe. A binocular loupe is known (see, for example, Patent Document 1).

Japanese Patent No. 5032332

  If a plurality of focus adjustment units are provided in advance and selectively used as in Patent Document 1, it is advantageous in terms of cost compared to a case where a plurality of binocular loupes are prepared. However, in the prior art, since a connecting member is provided for each of the binocular loupe and the focus adjustment unit, the focus adjustment unit cannot be attached to a normal binocular loupe that does not have a connection member, and there is a problem in terms of versatility. .

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a binocular loupe in which each focusing lens having a different focal length can be easily attached to and detached from the binocular loupe without providing a special connecting member. It is said.

  In order to solve the above-described problems, the binocular loupe according to the present invention has a magnifying glass in which an optical system for magnifying and observing an object at hand is arranged in a tube so as to correspond to both eyes of an observer. A binocular magnifying glass arranged on the eyepiece side of the binocular loupe when the focusing lens is attached to the eyepiece side of the binocular loupe; A lens cap that covers the eyepiece side of a loupe and holds the focus adjustment lens, and the lens cap is formed on a cap body of a bottomed cylindrical body and a bottom portion of the bottomed cylindrical body. A see-through hole having a diameter smaller than the diameter on the eyepiece side, and a lens that is provided in an annular shape so as to surround the see-through hole on the surface of the bottom of the cap body, and holds a focus adjustment lens inserted into the cap body A lifting unit is characterized by having a plurality of ribs disposed at equal intervals along the axial direction on the inner peripheral surface of the body portion of the cap body.

  In this case, the focus adjustment lens is prepared in advance according to the focal length to be adjusted, and the lens cap holds the selected one focus adjustment lens in accordance with the eyepiece side of the loupe. At this time, a plurality of the lens caps are prepared according to the lens thickness of the focus adjustment lens, and a suitable lens cap is selected and placed on the eyepiece side of the loupe, thereby holding the focus adjustment lens. Is certain.

  In the case of a binocular loupe having a spectacle frame having carrier lenses corresponding to both eyes of the observer, the loupe is inclined with respect to an upright line perpendicular to the carrier lens surface in a hole cut out in the carrier lens. Attached.

  In this case, the inclination angle is a downward angle with respect to the upright line and the center of the spectacle frame so that the observer can observe the object through a loupe located in front of the face. The angle is inclined toward the upright line.

  Furthermore, it is preferable that the opening surface of the cap body has an elliptical shape that is cut off. Accordingly, when the lens cap is put on the binocular loupe, the two points on the long axis of the ellipse are the end projecting the longest from the eyepiece side plane of the carrier lens and the end projecting the shortest By aligning with each part, the area that the lens cap covers on the eyepiece side of the loupe is increased, and the focus adjustment lens can be securely held.

  Since the binocular loupe of the present invention can hold the focus adjustment lens by simply covering the lens case on the eyepiece side of the loupe, there is no need to provide a special connecting member on the eyepiece side of the binocular loupe. Can be easily installed. The focus adjustment lens is securely held by placing the lens case on the eyepiece side of the loupe.

1 shows an overall configuration diagram of a binocular loupe according to an embodiment of the present invention. FIG. The structure of the optical system of the binocular loupe which concerns on embodiment of this invention is shown with a schematic diagram. Explanatory drawing of the state which performs the operation | work which wears the binocular loupe is shown. The explanatory view about lower mounting angle r at the time of attaching a loupe to a carrier lens is shown. Explanatory drawing about the inner mounting angles p and q at the time of attaching a loupe to a carrier lens is shown. The explanatory view which looked at the magnifier with which the carrier lens was equipped from the eyepiece side is shown. The eyepiece side of the loupe and the lens cap are shown in cross-sectional side views, in which (a) shows the state where the focus adjusting lens is aligned with the loupe, and (b) shows the state where the lens cap is placed on the loupe. Part (a) shows a plan view from the eyepiece side of the lens cap, and part (b) shows a side view of the lens cap. Part (a) shows a side sectional view of the lens cap, and part (b) shows a plan view from below of part (a). The cross-sectional perspective view of the state which set the focus adjustment lens to the eyepiece side of the loupe and covered the lens cap is shown. The cross-sectional perspective view of the state which set the thick focus adjustment lens to the eyepiece side of the loupe and covered the lens cap is shown. The cross-sectional perspective view of the state which set the thin focus adjustment lens to the eyepiece side of the loupe and covered the lens cap is shown. The whole block diagram of another type of binocular loupe to which the present invention is applied is shown.

  In the binocular loupe, the left and right eye loupes are respectively attached to the spectacle frame and the headband. There are two types of binocular loupes attached to the spectacle frame: a type that is directly supported by the spectacle frame, and a type that is fitted into a hole cut out in the spectacle lens (carrier lens).

  The present invention can be applied to any of the above binocular loupes. Hereinafter, a binocular loupe configured by attaching a loupe to a spectacle frame including a carrier lens will be described in detail with reference to the drawings.

  A binocular loupe 10 shown in FIG. 1 includes a spectacle frame 1, a loupe 2 corresponding to left and right eyes for enlarging a work target image, and left and right carrier lenses 5 for attaching the loupe 2. Prepare.

  The spectacle frame 1 having the same structure as the spectacles is composed of a rim 1A into which the carrier lens 5 is fitted and a vine portion 6 to be put on the ear. As a material constituting the spectacle frame 1 and the vine portion 6, a metal such as titanium which is hard to rust and has flexibility, a synthetic resin, or the like is used. Further, the material constituting the carrier lens 5 fitted into each rim 1A of both eyes does not necessarily need to be transparent, but is preferably transparent in order to widen the visual field in the direction of the observer's hand, and further the visual acuity A correction lens is used when it is necessary to correct the eyesight. However, when correction of visual acuity is not necessary, a simple transparent glass may be used. The lens material in this case is glass or plastic.

  In the loupe 2, as shown in FIG. 2, an objective lens group 41 and an eyepiece lens group 42 are arranged in a lens barrel along the central axis (optical axis) of the cylinder. The objective lens group 41 is provided with prisms 40a and 40b for refracting incident light so that image quality does not deteriorate even when the magnification is increased. A corrective lens (a lens with a degree) 18 for correcting the visual acuity of the user of the binocular loupe 10 is arranged at the end of the eyepiece side of the loupe 2, but it is corrected if it is not necessary to correct the visual acuity. By arranging a glass lens instead of the lens 18, these optical systems in the loupe 2 are protected.

  Although not shown in detail, the ring 3 provided on the outer periphery of the loupe 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, respectively. Is configured to be adjustable within a range of, for example, 3.3 to 4.8 times. The loupe 2 can also be used with a fixed magnification between the lenses and a fixed angle of view.

  Such a binocular loupe 10 is worn on the face with the vine portion 6 hung on the wearer's ear, like normal glasses. For example, when used by a surgeon to perform an operation, as shown in FIG. 3, the doctor enlarges the object at the surgical point P at the tip of the surgical instrument being held through the left and right loupes 2. Observe. At this time, the doctor looks down the left and right magnifying glass 2 and stares at the operating point P while dropping his line of sight.

  Therefore, as shown in FIG. 4, the left and right loupes 2 are attached to be inclined with respect to an upright line V perpendicular to the plane of the carrier lens 5. The inclination angle is attached to the upright line V so as to incline at a downward angle r (downward mounting angle). Further, as shown in FIG. 5, the left and right loupes 2 have an angle p and an angle q (inner mounting angle), respectively, toward a center line L connecting the center O of the spectacle frame 1 and the surgical site P as shown in FIG. It is attached to be inclined at.

  Therefore, the loupe 2 is fixed to the carrier lens 5 while maintaining the inclination of the lower mounting angle r and the inner mounting angles p and q when the loupe 2 is fitted and mounted in a hole cut out in the carrier lens 5.

  The lower mounting angle r and the inner mounting angles p, q vary depending on the posture of the binocular loupe 10 user in the work and facial features such as the interpupillary distance (PD), and are measured in advance. As a measuring method in this case, there are various methods such as having the user actually reproduce the working posture and actually measuring it with a measure. However, the applicant of the present invention is also disclosed in Japanese Patent Nos. 5662973 and 531601. A method for measuring a work posture based on an image obtained by imaging is disclosed.

  The correction lens 18 is disposed in the binocular loupe 10 to correct the user's visual acuity. However, since the visual acuity varies depending on the physical condition or environment, the power of the correction lens 18 may not match. Therefore, when the correction lens 18 is not aligned, the user adjusts the focal length by mounting the focus adjustment lens 11 on the eyepiece side of the loupe 2 as shown in FIG.

  The focus adjustment lens 11 is used as a correction lens 18 (or a glass lens) of the loupe 2 as necessary in order to correct the visual acuity when the user of the binocular loupe 10 magnifies and observes the object with the left and right loupes 2. The lens is a lens that corrects a long distance or a short distance that is used together. The lens cap 12 is attached to the loupe 2 by covering the eyepiece side of the loupe 2. Further, even when the user of the binocular loupe 10 does not normally need correction of visual acuity and uses a glass lens instead of the correction lens 18, the focal length is adjusted by using the focus adjustment lens 11 when the visual acuity changes. Is adjusted.

  The lens cap 12 includes a cap body 13 having a bottomed cylindrical body, and a see-through hole 14 for a user to look into the loupe 2 is provided at the bottom. The opening side of the cap body 13 has a cut-off elliptical shape, and ends t1 and t2 on the end face of the opening form two points on the major axis of the ellipse, and the end t1 The dimension M from the end surface on the eyepiece side from the axial direction becomes the maximum value, and the dimension N from the end surface of the end t2 from the axial direction becomes the minimum value.

  Thus, the loupe 2 has an oval shape with the end surface on the opening side of the cap body 13 cut off. The loupe 2 has a lower mounting angle r and an inner mounting angle p with respect to an upright line V perpendicular to the surface of the carrier lens 5. , Q to fit the eyepiece side end of the loupe 2 projecting obliquely at this angle from the eyepiece side surface of the carrier lens 5. Therefore, when the lens cap 12 is put on the eyepiece side of the loupe 2, the end t <b> 2 is put on the side of the lens barrel 19 of the loupe 2 that is the longest distance from the plane of the carrier lens 5 so as to match the end t <b> 1. Therefore, the lens cap 12 can be effectively covered and covered with the portion of the loupe 2 protruding from the eyepiece side surface of the carrier lens 5.

  Therefore, the focus adjustment lens 11 is prepared in advance with various focal lengths according to the degree of myopia or hyperopia (diopter) to be corrected. One of them is selected and used in accordance with the left and right eye loupes 2. When the lens cap 12 is put on the loupe 2 in a state where the focus adjustment lens 11 is aligned, the focus adjustment lens 11 is held by the see-through hole 14 of the cap body 13 of the lens cap 12.

  The lens cap 12 is, for example, a lens cap for setting the focus adjustment lens 11 having a thickness of 2.3 mm to + 0.50D (diopter) on the loupe 2. FIG. 8A is a plan view from the eyepiece side. 8 (b) is a bottom view, FIG. 9 (a) is a side sectional view, and FIG. 9 (b) is a plan view from the loupe 2 side. FIG. 10 is a sectional perspective view showing a state in which the lens cap 12 is put on the loupe 2. Note that only the correction lens 18 (or glass lens) is shown inside the lens barrel 19 of the loupe 2 in FIG. 10, and the objective lens group 41 and the eyepiece lens group 42 are not shown. The same applies to FIGS. 11 and 12 described below.

  The diameter of the eyepiece side of the see-through hole 14 in the cap body 13 is substantially the same as the diameter of the focus adjustment lens 11, but the diameter is made smaller toward the opening side and projected toward the central axis of the cap body 13. The lens holding part 15 is formed. The end portion on the opening side of the lens holding portion 15 is provided with a step so as to be the same as the size of the focus adjustment lens diameter to form the receiving portion 16 of the focus adjustment lens 11.

  As shown in FIG. 7A, the focus adjustment lens 11 is held by the lens holding portion 15 of the cap body 13 by placing the lens cap 12 on the loupe 2 in a state where the focus adjustment lens 11 is aligned with the correction lens 18. Then, as shown in FIG. 7B, the loupe 2 is set. Alternatively, the lens cap 12 is placed on the loupe 2 with the focus adjustment lens 11 held on the lens holding portion 15 of the lens cap 12, and the focus adjustment lens 11 is set on the loupe 2.

  A plurality of ribs 17 are formed at equal intervals along the axial direction on the inner peripheral surface of the cylinder of the cap body 13, and the ribs 17 cover the outer peripheral surface of the loupe 2 when the lens cap 12 is placed on the loupe 2. The lens cap 12 is fixed to the loupe 2 by pressing.

  The structure of the lens cap that holds the focus adjustment lens 11 differs depending on the lens thickness of the focus adjustment lens 11. A lens cap 12a shown in FIG. 11 is a lens cap used when, for example, the focus adjustment lens 11 having a thickness of + 3.00D and a thick lens of 4.1 mm is set on the loupe 2. It is shown in a cross-sectional perspective view. Thus, when the lens thickness of the focus adjustment lens 11 is large, a part of the lens 11 protrudes from the eyepiece side of the loupe 2. Therefore, by setting the dimension M1 of the end t1 and the dimension N1 of the end t2 from the end face on the eyepiece side of the lens cap 12a to be longer than the dimensions M and N of the ends t1 and t2 of the lens cap 12, respectively. The lens cap 12 supplements the axial length of the loupe 2 on the eyepiece side.

  A lens cap 12b shown in FIG. 12 is a lens cap used when, for example, the focus adjusting lens 11 having a thin lens thickness of -4.00D and 1.4 mm is set on the loupe 2, and is put on the loupe 2. Is shown in a cross-sectional perspective view. When the focus adjustment lens 11 is thin in this way, the lens holding portion 15 is set by setting the dimension d1 in the axial direction of the lens holding portion 15 protruding toward the center of the cap body 13 to be larger than the thickness dimension d2 of the bottom portion. The lens 11 is locked at the tip of the portion 15. Also in the case of the lens cap 12b, the dimensions M2 and N2 from the end surfaces on the eyepiece side of the end portions t1 and t2 are also set to be longer than the dimensions M and N of the end portions t1 and t2 of the lens cap 12, respectively. .

  The lens cap 12 can mount the focus adjustment lens 11 having a lens thickness in the range of 2.3 mm to 3.1 mm on the loupe 2, and the lens cap 12a has a lens thickness of 3.4 mm to 4.1 mm. The focus adjustment lens 11 in the range up to can be attached to the loupe 2, and the lens cap 12 b can attach the focus adjustment lens 11 in the lens thickness range of 1.4 mm to 1.1 mm to the loupe 2. .

  Therefore, in the present embodiment, the focus adjustment lens 11 selected from 14 types in increments of 0.5D from −4.00D to + 3.00D excluding 0.00D for normal vision is used as the correction lens 18 ( (Or a glass lens), and then the user can correct the visual acuity at a long distance or a short distance by covering the loupe 2 with one of the lens caps 12, 12a, 12b corresponding to the value of D (diopter). Can do.

  The lens caps 12, 12 a, and 12 b are covered with a portion where the loupe 2 protrudes from the eyepiece side surface of the carrier lens 5, but in the case of the thick focus adjustment lens 11 as described with reference to FIG. The distance in the axial direction when the lens cap 12a covers the loupe 2 is shortened. Therefore, in the lens cap 12a used when the thick focus adjustment lens 11 is fitted to the correction lens 18, the number of ribs 17 is increased or the height of the rib 17 is made larger than when the thin focus adjustment lens 11 is fitted to the correction lens 18. It is preferable to set.

  The user of the binocular loupe 10 may have such a D-value focusing lens 14 and the lens caps 12, 12a, 12b as accessory accessories. The user aligns the focus adjustment lens 14 of the appropriate diopter with the loupe 2 according to the state of visual acuity at that time and the state of ambient brightness, or depending on whether the work is performed in the sitting position or the standing position. Thus, the lens can be adjusted to the optimum focal length by covering any of the lens caps 12, 12a, 12b corresponding to the focus adjusting lens 14. Therefore, it is not necessary to prepare a plurality of binocular loupes according to the focal length.

  The present invention can be applied to a binocular loupe having no carrier lens as described above, and FIG. 13 shows an example of this type of binocular loupe. This binocular loupe 10A has a structure in which a loupe body 20 having a pair of left and right loupes 25 on a spectacle frame 21 is suspended by a pivotable shaft 23. The loupe main body 20 adjusts the screw 24 so that the loupe main body 20 can move left and right in the slit 26 according to the vertical position of the loupe 25 and the distance between the pupils of the observer. Further, the loupe 25 is rotatably supported on the vertical axis of the screw 24, and the inner mounting angle can be adjusted. The downward mounting angle of the loupe 25 can be adjusted by rotating the shaft 23 around a fulcrum.

  A lens cap 12 c that holds the focus adjustment lens 11 inside is connected over the eyepiece side of the loupe 25. In this type of binocular loupe, there is a type in which the correction lens 27 is attached to the spectacle frame without providing the correction lens 18 as shown in FIG. 2. In this case, the observer adjusts the focus through the correction lens 27. The loupe 25 is viewed through the lens 11.

  Thus, in the binocular loupe 10A of the type in which the loupe is not attached to the carrier lens, the interpupillary distance, the inner attachment angle, and the lower attachment angle are not fixed and can be arbitrarily adjusted. Further, the loupe main body 20 may be supported by being hung not on the spectacle frame 21 but on the headband.

  In the case of a binocular loupe that directly attaches a magnifying glass to a spectacle frame or a headband, since there is no carrier lens, the opening surface of the cap body of the lens cap 12c does not necessarily have to be a cut-off elliptical shape.

DESCRIPTION OF SYMBOLS 1 Eyeglass frame 2 Loupe 5 Carrier lens 10, 10A Binocular loupe 11 Focus adjustment lens 12, 12a, 12b, 12c Lens cap 13 Cap main body 14 Perspective hole 15 Lens holding part 17 Rib

Claims (6)

A binocular loupe in which an optical system for magnifying and observing an object at hand is arranged in a cylinder corresponding to both eyes of the observer,
The loupe is
A focus adjustment lens used to supplement the observer's long-distance or short-distance vision;
A lens cap that holds the focus adjustment lens over the eyepiece side of the binocular loupe when the focus adjustment lens is attached to the eyepiece side of the binocular loupe;
With
The lens cap is
A cap body of a bottomed cylindrical body;
A see-through hole formed at the bottom of the bottomed cylindrical body and having a diameter smaller than the diameter of the eyepiece side of the loupe;
A lens holding portion that is provided in an annular shape surrounding the see-through hole on the surface of the bottom portion on the cap body side, and holds a focus adjustment lens that is inserted into the cap body;
A plurality of ribs provided at equal intervals along the axial direction on the inner peripheral surface of the body of the cap body;
A binocular loupe characterized by comprising:   The focus adjustment lens is prepared in advance according to the focal length to be adjusted, and the lens cap holds the selected one focus adjustment lens according to the eyepiece side of the binocular loupe. The binocular loupe according to claim 1.   The binocular loupe according to claim 2, wherein a plurality of the lens caps are prepared according to the lens thickness of the focus adjustment lens. A spectacle frame having a carrier lens corresponding to both eyes of the observer;
2. The binocular loupe according to claim 1, wherein the loupe is attached to a hole formed in the carrier lens so as to be inclined with respect to an upright line perpendicular to the carrier lens surface.   5. The binocular loupe according to claim 4, wherein the angle of inclination is an angle inclined downward with respect to the upright line and toward the center line of the spectacle frame.   The opening surface of the cap body has a cut-off elliptical shape, and when the lens cap is put on the loupe, two points on the major axis of the ellipse are on the eyepiece side of the carrier lens of the loupe. The binocular loupe according to claim 5, wherein the binocular loupe can be adapted to each of an end that protrudes the longest from the plane and an end that protrudes the shortest.

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