JP2013137366A - Bifocal spectacles including device for switching between far vision and near vision - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that conventional bifocal spectacles are apt to induce fatigue of wearer's eyes because of an unnatural way of viewing and using in which the wearer changes a direction of his or her eyeballs and a viewing angle to view upward and downward through the spectacles and the problem that an optional commodity for switching between far vision and near vision by sliding contact plates to vertically move the spectacles is not user-friendly because the wearer cannot surely perform an operation for switching between far vision and near vision after removing the spectacles from his or her ears every time the wearer performs the switching operation.SOLUTION: A mechanism is provided where a fixing part of an arm of contact plates which has been conventionally fixed to lenses, lens rims, or a bridge connecting them of bifocal spectacles is softly fixed to the bridge freely turnably to allow movement of the fixing part and an arbitrary turning angle of the arm of the contact plates turned with a fixed frictional force is held between the fixing part and the bridge softly fixed to each other.

Description

  The present invention relates to both near and near spectacles equipped with a near / far switching device that provides an upper part of a lens for spectacles for far vision and a lower part for near vision.

  Peripheral glasses that use the upper part of a lens for eyeglasses for hyperopia and the lower part for nearsightedness change the direction of the eyeball and the viewing angle of the spectacles wearer. A common way to look at things is to look down. However, to look at things is to look straight ahead, which is also unnatural and unnatural, and can easily induce eye fatigue.

Japanese Patent Application Laid-Open No. 07-199126

  Peripheral glasses that use the upper part of one lens for spectacles and the lower part for myopia. Perspective glasses. When the wearer changes the direction of the eye or changes the viewing angle, It is a common usage to look at the lower eye when looking at things.

  However, to look at things, it is fundamental to look straight ahead, which is an unnatural way of looking, unnatural usage, unreasonable, and easily induces eye fatigue. In addition, there is an object that switches the perspective of the glasses for both perspectives by sliding the contact plate up and down with an optional product, but this is because the glasses that are put on each time the operation of sliding the contact plate is temporarily performed. It is inconvenient and inconvenient that you cannot operate it without removing it from your ear.

  Since the lens for perspective lenses is used for hyperopia at the top of the lens and for myopia at the bottom of the lens, the switching operation of the perspective for both the perspective and spectacles is performed by the wearer of the perspective glasses. It is reasonable to move it up and down along the face, but the perspective glasses moved up and down need to be kept at any position along the face of the wearer. However, there has never been a pair of glasses that can perform such a function with a simple operation.

  In view of this, the present invention relates to a lens frame for a pair of perspective glasses or a fixing portion of an arm for mounting a contact plate that has been fixed to a bridge connecting them. It was made movable so that it can be swung freely in the vertical direction.

  In addition, a certain frictional force is provided between the softly-fitted bifocal bridge and the arm of the contact plate so that the arm of the contact plate does not rotate in the vertical direction without permission. When the arm of the abutting plate is rotated by applying an external force against the frictional force, it is possible to maintain the rotated angle in the arbitrary vertical direction.

  This is a mechanism that interlocks the change in the vertical rotation angle of the arm of the abutment plate and the movement of the upper and lower positions of the perspective glasses on the face of the wearer's face. If the friction force between the arm of the contact plate and the arm of the contact plate rotates in the longitudinal direction of the contact plate arm, the contact plate that contacts the vicinity of the nose of the eyeglass wearer through the arm It is determined and held at any position above and below the front and rear glasses on the face of the wearer's face by supporting the load on the front of the glasses.

  The perspective glasses equipped with the perspective switching device according to the present invention are designed to slide the abutment plate up and down like the existing optional products, and once the ears for the perspective glasses that are applied each time the switching operation is performed. There will be no inconvenience and inconvenience that you can't switch between certain perspectives without removing them. The perspective switching operation of the perspective glasses can be performed easily, quickly and surely while the perspective glasses are worn. It is also a feature of the present invention that the top and bottom positions of the perspective glasses on the face of the wearer of the perspective glasses can be set steplessly and finely.

  In addition, there is no need to use the unnatural way of looking at the upper eye and the lower eye, and unnatural usage. Hard to do. In addition, because it is very easy to switch between near and far, it is especially convenient when you want to read newspapers and magazines at home while watching a little TV at home. It is possible to cope with it.

The perspective view which shows the state which softened the arm 1 of the contact plate 4 of Example 1 to the bridge | bridging 3 of the both-sides glasses. The side view which shows the operation | movement condition when seeing the distant thing of the arm 1 of the contact plate 4 softly attached to the bridge 3 of the both-sides glasses of Example 1. FIG. The side view which shows the operation | movement condition when seeing the thing near the arm 1 of the contact plate 4 soft-fitted to the bridge 3 of the both-purpose glasses of Example 1. The perspective view of Example 2 which shows the state which softened the arm side of the nosepiece 8 of the shape where the contact plate 4 of Example 1 and the arm 1 were united to the bridge 3 of the both-sides glasses.

  Conventionally, the abutment plate for both perspective glasses has been attached to the tip of an arm fixed to the perspective glasses lens, the lens frame, or the bridge of the perspective glasses connecting them. You cannot create movement from a fixed object.

  In order to switch the distance between the perspective glasses, the perspective glasses must be capable of moving the perspective glasses themselves. In view of the above, the present invention relates to a lens for a perspective lens or a lens frame, or a base part of an arm for mounting a contact plate fixed to a bridge for a perspective lens that connects them. The bridge that connects the frames is wrapped around or sandwiched by a plurality of members so that it can freely rotate.

  In addition, a constant frictional force is provided between the bridge and the arm of the contact plate so that the arbitrary rotation angle of the rotation of the arm of the contact plate can be maintained.

  FIG. 1 is a perspective view showing an embodiment of the present invention, in which one of the arms 1 branches into two on a bridge 3 that connects the left and right lenses 6 of the glasses for both perspective and the frame 5 of the left and right lenses 6. The other side or the vicinity of the arm 1 having the abutting plate 4 operating at the end is softly attached so as to be able to turn around the bridge 3 or be sandwiched by a plurality of members, and loosely and tightly tightened by tightening of the screw or screw 2 A constant frictional force is provided between the two (arm 1, contact plate 4) that are adjusted and softly worn.

  The constant frictional force mentioned here can be freely rotated by applying a little external force, but immediately after the external force is released, the arm 1 of the contact plate 4 immediately rotates. This is the frictional force with the strength to maintain the angle.

  In order to smooth the pivoting of the soft-wearing portion of the arm 3 of the bifocal glasses 3 and the abutment plate 4, it is desirable that the material of the bifocal bridge 3 is round and straight. Moreover, in order to increase the frictional force of the part where both are softly attached, it is better that the diameter of the round bar-like material is larger.

  Referring to the perspective switching operation of the perspective glasses of the present invention, in FIG. 1, the front and rear of the perspective glasses heel are pressed against their faces, and the contact plate 4 is placed near the upper side of the nose. Using this point as a fulcrum, a little force is applied along the face of the wearer who wears both-side-and-near glasses, and moves upward or downward. When this force exceeds the frictional force between the bridge 3 for both near and near glasses and the arm 1 of the contact plate 4 softly attached thereto, the arm 1 of the contact plate 4 rotates about the bridge 3 for both near and near glasses, Change the angle to forward-down or up-front. Since the bridge 3 for both near and near glasses is in the horizontal direction, the rotation direction of the arm 1 of the abutment plate 4 softened with this as the axis is vertical rotation.

  Further, the vertical rotation angle of the arm 1 of the abutment plate 4 and the vertical position of the perspective glasses along the face of the wearer of the perspective glasses are linked to each other, which is a major feature of the present invention. It is a feature. Here, when the switching operation of the perspective glasses is completed and the operation with the front vicinity of the perspective glasses vine is released, the bridge 3 of the perspective glasses and the arm 1 of the abutment plate 4 are loosely attached. The vertical rotation angle of the arm 1 of the abutment plate 4 at that time is immediately maintained by the frictional force of the part, and as a result, the position of the upper and lower glasses on the face of the wearer's face linked to this is specified. And retained.

  Next, the operation method for viewing a distant object will be described. Hold the front and rear of the glasses for the perspective glasses and put the glasses for the perspective glasses a little along the face of the wearer of the perspective glasses. Push it down slightly as shown in the side view. When this force exceeds the frictional force of both the bridge 3 of the perspective glasses and the portion where the arm 1 of the contact plate 4 is softly attached, the contact plate 4 that is in close contact with the near upper side of the nose of the wearer of the perspective glasses. Is used as a fulcrum, the arm 1 of the abutment plate 4 rotates in the vertical direction about the softly-fitted bilateral eyeglass bridge 3 as an axis, and the angle decreases downward.

  In this way, what is desired to be seen in the distance, the far-sighted part A at the top of the lens used for the distance vision of the glasses for both perspectives lowered downward, the position and angle of the eyeball of the eyeglass wearer, When it is in a straight line, when the hand holding the front of the front and rear glasses is released, the vertical rotation angle at this point of the front lowering of the arm 1 of the contact plate 4 is the arm of the contact plate 4. It is held by the frictional force between the soft and the bridge 3 of the first and second eyeglasses 3 and thus the upper and lower positions of the second and second eyeglasses along the face of the wearer of the near and right eyeglasses are immediately held and stable. And you can see the distant things.

  Also, when looking at a nearby object, as shown in the side view of FIG. 3, hold the front plate of the pair of glasses for both perspective and close contact with the contact plate 4 in the vicinity of the upper side of its nose as described above. As a fulcrum, push the bifocal glasses up with a little force along the face of the wearer. When this force exceeds the frictional force of both the bridge 3 of the perspective glasses and the portion where the arm 1 of the contact plate 4 is softly attached, the contact plate brought into close contact with the upper side of the nose of the wearer of the perspective glasses 4 is used as a fulcrum, the arm 1 of the abutment plate 4 rotates in the vertical direction about the bridge 3 of the perspective glasses for soft wearing, and the angle rises forward.

  In this way, the position and angle of the eyeball of the wearer wearing the near vision B, the near vision lens B provided at the lower part of the lens 6 provided for near vision of the near vision glasses that are pushed up, When it is in a straight line, when the hand holding the front of the pair of perspective glasses is released, the arm 1 of the abutting plate 4 that has been rotated vertically upward about the bridge 3 at this point is used. The moving angle is held by the frictional force of the soft and loose parts of the arm 1 of the bifocal glasses bridge 3 and the abutment plate 4, and thus the vertical position on the face of the wearer of the bifocal glasses is also immediately held. It is possible to look at the nearby object in a stable manner.

  Whether the vertical rotation angle of the arm 1 of the abutment plate 4 is lowered forward, raised forward, or increased or decreased in the switching operation of the glasses for both perspectives. However, in the embodiment of the present invention, the bridge 3 is different depending on whether the bridge 3 for both perspective lenses is installed above the center of the lens 6 or vice versa. An example in which the lens 6 is installed at a height near the center has been described.

  The nosepiece described in the first embodiment is composed of the arm 1 and the contact plate 4 movably mounted on the arm 1, but in this second embodiment, as shown in FIG. The example using the nosepiece 7 integrated with the contact plate 4 is shown. One of the arms 1 is branched into two, and has a convex lower edge 72 at each end portion. The nosepiece structure has a concave upper edge 71, and the other side or the vicinity of the other side of the arm 1 surrounds the bridge 3 as an axis and is fixed to the arm 1.

  This nosepiece has a larger area for contacting the nose and the vicinity of the nose than the nosepiece of the first embodiment, and of course, when the normal and normal glasses are worn, the contact plate is pressed against the nose to change the distance. Sometimes it reduces and relieves pressure on the nose.

  In addition, the concave upper edge 71 of the branch portion of the nosepiece is provided with a fold with a rounded upper front from the perspective glasses wearer, and this is a switching operation between the perspective glasses. Even when the angle of the nose is changed forward, it is designed to gently touch the nose.

  Since the present invention thus configured can easily, quickly and reliably change the distance between the perspective glasses, it must be removed from the ear once it is worn, as with existing optional products. There are no inconveniences and inconveniences such as inability to reliably switch between near and far, and it is possible to easily and reliably switch between near and far while wearing the glasses for both directions. In addition, it is not necessary to change the direction and angle of the eyeball and change the direction and angle of the eyeball as before, so there is no need to use an unnatural way of looking. It does not induce eye fatigue.

  Furthermore, for example, when watching a television a little far away at home and wanting to read a newspaper or a magazine at hand, it is possible to easily deal with it without feeling troublesome in the switching operation.

DESCRIPTION OF SYMBOLS 1 Arm 2 Screw or small screw 3 Bridge 4 Contact plate 5 Lens frame 6 Lens 7 Nose contact 8 Nose contact (arm 1, contact plate 4)
71 Convex upper edge 72 Convex lower edge A Far-sighted part of lens 6 B Myopic part of lens 6

Claims (3)

A perspective glasses having a switching device for perspective glasses with arms 1 on the right and left lenses 6 of the perspective glasses or the bridge 3 of the perspective glasses connecting the frame 5 of the lens 6;
The other side of the arm 1 or the vicinity of the other side is wrapped around the bridge 3 or sandwiched by a plurality of members, and is softened so as to be rotatable, so that a certain frictional force is provided between the bridge 3 and the arm 1. Perspective glasses equipped with a perspective switch that can hold any rotation angle.   The perspective switching device according to claim 1 is configured such that one of the arms 1 branches into two on the left and right lenses 6 of the perspective glasses, or the bridge 3 of the perspective glasses connecting the frame 5 of the lenses 6. A perspective switching device characterized in that it has a movable contact plate 4 at the end, and the other or the vicinity of the arm 1 is a nose pad 8 that wraps around the bridge 3 and is fixed to the arm 1. Perspective glasses equipped with.   The perspective switching device according to claim 1 is configured such that one of the arms 1 branches into two on the left and right lenses 6 of the perspective glasses, or the bridge 3 of the perspective glasses connecting the frame 5 of the lenses 6. A nosepiece 8 having a convex lower edge 72 at an end and a concave upper edge 71 at a branching portion, and the other or the vicinity of the arm 1 wraps around the bridge 3 and is fixed to the arm 1. Perspective glasses equipped with a perspective switching device characterized by being.