JP5097589B2 - Loupe - Google Patents

Description

  The present invention relates to a loupe for enlarging an object to be observed.

Conventionally, a magnifying glass for reading is provided with a handle on a holding frame that holds a convex lens. The handle is supported by a hand and supported by an easy-to-see distance between the book and the eyes. For example, see Patent Document 1).
JP 2004-53787 JP

  The conventional loupe has a problem that the arm becomes tired when reading for a long time because the loupe is supported at a distance that is easy to see between the book and the eyes by holding the handle.

  In order to solve the above-described problems, the present invention provides a lens, a holding member that is disposed on the outer periphery of the lens and holds the lens, and is positioned on the edge of the lens at a position facing the holding member with the lens interposed therebetween. A handle member that can be disposed in contact with the holding member, and a rotating unit that is disposed at one end of the holding member and rotatably supports the handle member in a plane that intersects the surface of the lens. Provide a loupe.

  ADVANTAGE OF THE INVENTION According to this invention, the loupe which can reduce the fatigue | exhaustion of the arm which supports a loupe even for long-time reading can be provided.

  Hereinafter, a loupe according to an embodiment of the present invention will be described with reference to the drawings. The following embodiments are merely for facilitating understanding of the invention, and excluding additions and substitutions that can be performed by those skilled in the art without departing from the technical idea of the present invention. It is not intended.

  1A and 1B show a loupe according to an embodiment, wherein FIG. 1A is a front view, FIG. 1B is a cross-sectional view taken along the line AA, and FIG. 1C is a side view viewed from the X direction. .

  In FIG. 1, a loupe 100 is fitted into a convex lens 1, a lens holding frame 2 that holds the convex lens 1, a rotation shaft hole 3 that is disposed at one end 2 a of the lens holding frame 2, and the rotation shaft hole 3. It is comprised from the handle 5 which has the rotating shaft 4 to join.

  The convex lens 1 is formed in a rectangular shape, and almost half of the outer peripheral portion of the rectangular convex lens 1 is held by a lens holding frame 2 formed in a substantially U shape. The substantially U-shaped lens holding frame 2 has a groove (not shown) into which the convex lens 1 is fitted inside, and the convex lens 1 is bonded and held in this groove.

  The handle 5 is formed in a substantially U shape and is disposed on the outer peripheral portion of the convex lens 1 at a position facing the lens holding frame 2. At one end portion 5a of the handle 5, a rotation shaft 4 is formed which is inserted into a rotation shaft hole 3 formed at one end portion 2a of the lens holding frame 2 and holds the handle 5 so as to be rotatable.

  The rotating shaft 4 is inserted into the rotating shaft hole 3 via a restricting member 4a such as an elastic body. The handle 5 can be easily rotated by this elastic body and the rotation is restricted when no force is applied. Yes. Thereby, the handle 5 can be rotated in a plane substantially perpendicular to the surface of the convex lens 1. Needless to say, the regulating member 4a is not limited to an elastic body such as rubber, and a material can be appropriately selected. In addition to the restriction by friction such as rubber, a click structure or the like that restricts rotation at a predetermined angular gap may be employed. By having such a regulating member 4a that regulates the rotation of the rotating shaft 4, it is possible to set and hold the angle between the surface of the convex lens 1 and the handle at a predetermined angle when using the loupe 100 described later. become.

  The handle 5 is configured to be able to rotate 360 degrees with respect to the central axis of the rotary shaft hole 3, and the position of the handle can be set at an arbitrary angle. Thereby, the loupe 100 can be used for both right-handed and left-handed users.

  The inner shape of the handle 5 has a shape along the outer periphery of the rectangular convex lens 1, and the other end portion 5 b of the handle 5 is bent along the outer peripheral portion of the short side of the rectangular convex lens 1. Is formed. And the grip part 5c is formed between the one end part side 5a with which the rotating shaft 4 exists, and the other end part side 5b.

  When the handle 5 is rotated and the handle 5 is folded, as shown in FIG. 1C, the handle 5 is placed in contact with the edge of the convex lens 1 along the outer periphery of the convex lens, and is substantially flat and has a shape of the convex lens 1. It can be made the same shape as the above, and there is no protrusion, making it compact and easy to carry in a pocket. Also at this time, since the regulating member 4a regulates the rotation of the handle 5, the handle 5 does not move freely, and the flat state shown in FIG. 1C can be maintained. Further, by forming a groove that fits with the edge of the convex lens 1 on the inner peripheral side of the handle 5, it is possible to prevent the handle 5 from moving unintentionally.

  Next, how to use the loupe 100 will be described with reference to FIG. 2A and 2B show examples of the state of use of the loupe according to the embodiment. FIG. 2A is a front view, and FIG. 2B is a side view seen from the X direction.

  2B, the handle 5 of the loupe 100 is rotated by approximately 90 degrees (θ = 90 degrees), and the other end portion 5b of the handle 5 is placed on the surface of the desk 6 on which a book or the like (not shown) is placed. Shows the state. At this time, the handle 5 is held at an angle (here, θ = 90 degrees) set by the angle between the handle 5 and the surface of the convex lens 1 because the rotation shaft 4 restricts rotation by the restricting member 4a.

  The user can magnify a book or the like placed on the desk 6 from above the convex lens 1 by grasping the grip portion 5c of the handle 5. At this time, since the weight of the loupe 100 is applied to the desk 6 on the other end side 5b through the handle 5, the user does not need to support the weight of the loupe 100 with the arm. As a result, fatigue of the arm when the loupe 100 is used for a long time can be reduced. Moreover, since the outer peripheral surface of the other end portion 5b has a flat shape in the direction in which the handle 5 is provided, the outer peripheral surface can be stably placed on the desk 6 while being supported by the hand.

  The distance L between the convex lens 1 and the desk 6 on which the book is placed is shortened by increasing the angle θ formed by the convex lens 1 and the handle 5. By adjusting the angle θ, the loupe 100 can be arranged at a distance that is most easily seen by the user.

  In general, a loupe 100 for reading uses a convex lens 1 (including a Fresnel lens or the like) having a focal length of about 250 to 125 mm, that is, about 4 to 8 diopters. Furthermore, the thing with the large external shape is preferable so that it can see with both eyes. Further, since the reading loupe 100 has a long focal point, the distance from the observation object (for example, a book) to the eye is set to 350 mm to 400 mm, and the loupe 100 is placed in the middle of the distance, the maximum magnification is obtained. When the convex lens 1 is moved to the position, the magnification can be changed.

  In the present embodiment, the distance L between the desk 6 and the convex lens 1 is defined by the length of the grip portion 5c of the handle 5, etc. The function of the reading loupe 100 can be exhibited by forming the grip portion 5 c to be shorter than the focal length of the convex lens 1.

  Hereinafter, specific numerical examples will be described. In the following embodiments, the unit is described in mm. However, the optical system can be proportionally enlarged and reduced, and the unit is not limited to this.

Example 1
It shows an example based on Figure 2.

Long side of convex lens 1 D1 = 150 mm
Short side of convex lens 1 D2 = 100 mm
Diopter of convex lens 1 = + 4 (focal length 250 mm)
Thickness D5 = 30 mm at the end side 5b of the handle 5
Length of grip 5c of handle 5 D4 = 150mm

  In the case of such a loupe 100, the distance L from the desk 6 to the convex lens 1 is the length of the long side of the convex lens 1 (length of the grip portion 5c) 150 mm, the thickness 5 mm of the end side 5b, and the rotation axis. The distance to the center of 4 (D3 / 2) is 195 mm, which is the sum of 15 mm.

  This L = 195 mm coincides with the standard position of the reading loupe 100, and the observation object placed on the desk 6 can be enlarged and observed.

  Moreover, the length of the grip part 5c is 150 mm, and this is formed in a dimension having a margin as compared with an adult fist width.

  Further, the end side 5b of the handle 5 is curved along the outer periphery of the convex lens 1, so that the little finger side of the hand that grips the grip part 5b comes into contact with the handle 5 to prevent it from falling out of the hand. Supports even when it falls.

  The loupe 100 is placed on the desk 6 with the tip of the elbow on the desk 6 and the loupe 100 is also placed on the desk 6 with the end 5b of the handle 5 as a fulcrum. Can reduce fatigue.

(Example 2)
FIG. 3 is a diagram illustrating a loupe 200 according to the second embodiment. The difference from the first embodiment is that the convex lens 11 is changed from a rectangle to a circle, and the shape of the lens holding member 12 and the handle 15 on the side of the convex lens 11 is changed accordingly.

The diameter of the convex lens 11 D1 = 150 mm
Diopter of convex lens 1 = + 4 (focal length 250 mm)
Thickness of the end 15b of the handle 15 D3 = 30 mm
Length of grip 15c of handle 15 D4 = 150mm

  In the case of such a loupe 200, the distance L from the desk 6 to the convex lens 11 is as follows: the diameter of the convex lens 11 (length of the grip portion 5c) is 150 mm, the thickness of the end side 5b is 30 mm, and the center of the rotating shaft 4. The distance (D3 / 2) of the total of 15 mm is 195 mm.

  The second embodiment can achieve the same operations and effects as the first embodiment, and detailed description thereof will be omitted.

  In the above embodiment, the convex lenses 1 and 11, the lens holding members 2 and 12, and the handles 5 and 15 are each formed as an independent member and assembled, but the convex lenses 1 and 11 and the lens holding are described. The members 2 and 12 may be integrally formed and the handles 5 and 15 may be assembled. Further, at least two of the convex lenses 1 and 11, the lens holding members 2 and 12, and the handles 5 and 15 may be formed of the same material (for example, plastic).

  As described above, according to the loupe according to the present embodiment, it is possible to provide a loupe that can reduce fatigue of the arm during observation over a long period of time by placing the end of the rotated handle on a desk. .

  Moreover, the loupe which can arrange | position a convex lens to an optical reference position can be provided by putting the edge part of the rotated handle on a desk.

  Further, by adjusting the turning angle of the handle, it is possible to provide a loupe that can cope with a change in the position of the convex lens due to individual differences.

  Moreover, since the handle can be rotated 360 degrees, it is possible to provide a loupe that can be used in a suitable state by both right-handed and left-handed users.

  Further, when the handle is folded, it can be formed into a flat plate having the same thickness as the convex lens, and a loupe that can be carried without being aware of the handle can be provided.

1A and 1B show a loupe according to an embodiment, wherein FIG. 1A is a front view, FIG. 1B is a cross-sectional view taken along the line AA, and FIG. 1C is a side view viewed from the X direction. . 2A and 2B show examples of the state of use of the loupe according to the embodiment. FIG. 2A is a front view, and FIG. 2B is a side view seen from the X direction. The loupe concerning Example 2 is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,11 Convex lens 2,12 Lens holding frame 3 Rotating shaft hole 4 Rotating shaft 5,15 Handle 100, 100 Loupe

Claims (8)

And the lens,
A holding member disposed on an outer periphery of the lens to hold the lens;
A handle member that can be disposed in contact with an edge of the lens at a position facing the holding member across the lens;
A magnifying glass, comprising: a rotating means disposed at one end of the holding member and rotatably supporting the handle member in a plane intersecting the surface of the lens.   The loupe according to claim 1, wherein a side of the handle that contacts the edge of the lens has a shape along an outer periphery of the lens.   The magnifying glass according to claim 1 or 2, wherein a length of the grip portion of the handle is shorter than a focal length of the lens.   The magnifying glass according to any one of claims 1 to 3, wherein the rotating means has a restricting means for holding the handle at a predetermined angle.   The loupe according to any one of claims 1 to 4, wherein at least two of the lens, the holding member, and the handle member are formed of the same material.   The loupe according to claim 1, wherein the holding member is formed as a part of the lens.   The magnifying glass according to any one of claims 1 to 6, wherein the lens is formed in a rectangular shape, and a length of one side of the rectangle is shorter than a focal length of the lens.   The magnifying glass according to any one of claims 1 to 6, wherein the lens is formed in a circular shape, and the diameter of the circle is shorter than the focal length of the lens.

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