JP5408647B2 - Glasses and glasses vertical position adjustment device - Google Patents

Description

  The present invention provides glasses, and more particularly glasses that can promote autonomous movement of the ciliary body of the eye.

In order to prevent eye strain, to prevent deterioration of visual acuity, or to improve visual acuity, it is common sense that it is better to look far away. Viewing distances incurs these advantages because in daily life, people often stare at television and personal computer displays, read newspapers and books, and look closer to corners. If the act of seeing is done consciously, the ciliary body has more opportunities to exercise.
In other words, in order to maintain and improve eye health, it is preferable to increase the ciliary body movement as much as possible.

  Many instruments for improving ciliary body movement have been proposed so far, but the present applicant has filed an application for a myopia / presbyopia prevention device described in published patent publication No. 88143 in 1995. Yes. The myopia / presbyopia preventive device disclosed in this application is for a user to see the outside world, and has a diopter adjusting means adapted to automatically adjust the user's diopter over time. It is. The diopter adjustment means of this myopia / presbyopia prevention tool automatically and alternately repeats the time of functioning as a lens and the time of non-functioning as a lens, thereby forcing the ciliary body of the user's eyes to move.

Since this myopia / presbyopia prevention tool can be used every day, it has the advantage of being able to promote ciliary movement in daily life. However, this myopia / presbyopia prevention device is not without its improvements.
The diopter adjustment means of the above-mentioned myopia / presbyopia prevention tool automatically and alternately repeats the time for functioning as a lens and the time for not functioning as a lens. The application shows several mechanisms for this purpose.
For example, a mechanism using a transparent body in which the periphery of a stretchable film material arranged in parallel is hardened with an appropriate frame is disclosed in the application. In this mechanism, by filling or discharging a transparent liquid (or gel) in the space between the transparent bodies as necessary, both membrane materials are expanded outward or in parallel. Thus, the state in which the entire transparent body functions as a lens and the state in which the entire transparent body does not function as a lens are switched. Alternatively, in this application, the lens is switched between a functioning state and a functioning state of the lens by moving the lens in front of the user's eyes or by sliding the lens laterally out of the field of view. A mechanism for doing so is disclosed.
All of these mechanisms are theoretically feasible, but the former has problems such as weight increase due to the use of liquid, and the latter requires a large space for moving the lens. In addition, there is a problem that it is difficult for the user to accept mainly in terms of design.

  An object of the present invention is to solve the above-described problems, and to reduce the size and weight of eyeglasses that can be used daily and can promote ciliary movement.

The inventor of the present application proposes the following as an invention for solving such a problem.
One aspect of the present invention is eyeglasses including a main body unit including right and left eye lenses whose relative positions are fixed. The lens of the spectacles is configured such that the upper range power, which is a predetermined range in the upper part, is different from the lower range power, which is a predetermined range in the lower part, and the position of the main body part is changed. By moving up and down according to the passage of time, the upper range and the lower range of the lens are alternately positioned on the line of sight when the user wearing the glasses looks at the front. Position adjusting means.
The lens included in the spectacles has an upper range and a lower range of different powers. This is, for example, the same configuration as a known bifocal lens. And in this spectacles, a lens moves to an up-down direction. Therefore, for example, a user using this spectacle is in the same state as putting on spectacles having two lenses having different powers alternately (or putting on / off one spectacle). Therefore, if this spectacle is used, the movement of the ciliary body is promoted. Moreover, in this spectacle, the lens is moved in the vertical direction in order to produce the same state as the spectacles having two lenses having different powers are alternately put on (or the spectacles are put on and off). The simple structure was adopted. With such a structure, the weight is not increased as in the case of using a liquid, and the spectacles are not increased in size as in the case of moving the spectacle lens in the left-right direction. There is no inconvenience in the design. Employing a mechanism for moving the lens in the vertical direction also has the effect of simplifying the mechanism derived from the fact that linear movement is necessary for the movement.

As described above, the lens of the present invention only needs to have different powers in the upper range and the lower range. The lens may or may not have the same area in the upper range and the lower range, and the boundary line may be a straight line or a curved line. The boundary between the upper range and the lower range of the lens does not need to be strictly separated by a narrow linear part such as a boundary line, and the lens has a part where neither the upper range nor the lower range is present. It may be. For example, at least one intermediate range having a power different from that of the upper range and the lower range may be provided between the upper range and the lower range of the lens. In other words, the lens of the present invention may be divided into several parts in the vertical direction as long as it has two ranges of an upper range and a lower range.
The lens may be such that both the power of the upper range and the power of the lower range are uniform throughout, or at least one of the power of the upper range and the power of the lower range is not uniform. It doesn't matter.
The lens may have any combination of power in the upper range and power in the lower range, both positive, negative, and positive / negative, one being positive or negative and the other being 0. If the lens is such that the power in the upper range and the power in the lower range are both uniform and not zero, glasses must be originally applied to correct vision. For those who cannot, the eyeglasses of the present invention can provide visual acuity correction and promotion of ciliary movement.
The power in the upper range and the power in the lower range of the lens can be specified as follows according to the power of the lens. If the power of the upper range and the power of the lower range are both equal to the power of the upper range and the power of the lower range, one of the powers is suitable for the user (for example, correction of vision) Is approximately 0.0D for users who do not need to be used (D) if the user has nearsightedness (negative predetermined numerical value), D if the user has farsightedness (positive predetermined numerical value) D), and the other to the user The frequency shifted from either the appropriate frequency by 0.3D to 4.0D in either positive or negative direction can be obtained. If one of the power in the upper range and the power in the lower range of the lens is set as a power suitable for the user, the user can use the glasses normally. Further, by setting the other of the power in the upper range and the power in the lower range of the lens to a frequency shifted in a positive or negative direction by 0.3D to 4.0D from a frequency suitable for the user, the ciliary body is given to the user. It will be possible to exercise properly. This difference is small because it is preferable to shift the other power of the upper range of the lens and the lower range of the lens from 0.3 to 4.0 D in either positive or negative direction from the appropriate frequency for the user. If the difference is too large, the user's eyes will become tired, the eyes will not catch up with changes in the lens power, and in some cases it will be difficult to see the object itself. This is because something happens. The human eye has the ability to adjust the focus between the far and near points, but the size is generally 14D at 10 years old, 10D at 25 years old, and 10D at 50 years old, although there are individual differences. It is said to be about 2.5D. Of the power in the upper range and the power in the lower range of the lens, the difference between the power suitable for the user and the other power not described above is a range in which the user's eyes can follow the change in the lens power. Therefore, it is preferable to set it to about 1/6 to 1/3 of the ability of adjusting the focus of the user's eyes. The other of the power in the upper range and the power in the lower range of the lens is generally shifted by about 0.3D to 1.0D in either the positive or negative direction from the power suitable for the user, and 0.4D to 0.6D. It is considered to be the most versatile to be shifted to some extent.
It should be noted that it is only necessary to appropriately select whether the power in the upper range of the lens or the power in the lower range is appropriate for the user. However, considering that the burden on the user can be reduced, it is preferable to set the power in the upper range of the lens to a frequency suitable for the user.

As described above, in the lens, at least one of the power in the upper range and the power in the lower range may not be uniform.
For example, the lens may be configured such that both the power in the upper range and the power in the lower range gradually increase or decrease from the upper side to the lower side. In particular, when the power at the lower end of the upper range of the lens and the upper end of the lower range of the lens are substantially the same, the lens gradually increases or decreases from the upper side to the lower side. It becomes a progressive focus lens as a whole.
With such a lens, when the lens is moved up and down, the change in frequency when the user's line of sight is assumed to be smooth becomes smooth. You can encourage the movement of the body. In addition, as an effect of the glasses of the present application, “a user who uses these glasses, for example, puts on glasses having two lenses having different powers alternately (or puts on and off a pair of glasses). ). However, in the case of spectacles including a lens that is a progressive focus lens as a whole, the user constantly changes innumerable lenses having different powers.
In the case of spectacles including a lens that is a progressive focus lens as a whole, the power of either the upper range or the lower range of the lens can be set to a frequency suitable for the user. By doing so, the user can use the glasses normally.
The selection of which part of the lens is appropriate for the user may be made as appropriate. For example, the frequency of the part of the lens that intersects the user's line of sight as viewed from the front is determined as the appropriate degree for the user. can do. Then, it is considered that the user can easily use the glasses. For example, when the mechanism for moving the eyeglass lens up and down is not operated, the eyeglasses can be used in much the same way as normal eyeglasses.

  When the power of the upper range and the lower range of the lens are both uniform, it is common in all cases where at least one of them is uniform. The difference between the frequency of the portion having the largest frequency and the frequency of the portion having the smallest frequency can be in the range of 0.3D to 4.0D. If this difference is small, the ciliary body will not move too much, and if this difference is too large, the user's eyes will become tired or the eyes will not catch up with changes in the lens power. This is because it becomes difficult. Of the lenses, the difference between the power of the most frequent portion and the power of the least frequent portion is preferably in a range in which the user's eyes can follow the change in the lens power. Is preferably about 1/6 to 1/3 of the ability to adjust the focus. If this difference is 0.3D-1.0D, it will be general purpose, and it is thought that it is the most general purpose to be about 0.4D-0.6D.

The spectacles of the present invention may include a nose pad that abuts on a nose bridge of a user wearing the spectacles. In that case, the position adjusting means may be configured to connect the main body portion and the nose pad, and to change a distance between the main body portion and the nose pad. In this case, by changing the distance between the nose pad and the main body, the upper range and the lower range of the lens are alternately positioned on the line of sight when the user wearing spectacles looks at the front. However, since only a linear actuator that realizes a linear motion is required, manufacturing is relatively easy.
More specifically, the nose pad includes a rod body that is a rod-like body extending upward from the nose pad, and the main body portion includes a nose pad support portion that supports an upper portion of the rod body. In this case, a linear actuator is constituted by the rod body and the nose pad support portion, and the rod body is moved and positioned in the length direction with respect to the nose pad support portion. The distance between the main body and the nose pad can be changed.
The glasses of the present invention may have two temples. In this case, the position adjusting means is locked to the ear of the user wearing the glasses, and means for changing the angle of the ear-side temple within a vertical plane including the temple. It may be configured as provided. In this case, by changing the angle of the temple, it is realized that the upper range and the lower range of the lens are alternately positioned on the line of sight when the user wearing spectacles looks at the front. However, the mechanism for realizing the rotational movement of the temple is relatively easy to manufacture.

The inventor of the present application proposes a spectacle vertical position adjusting device for converting existing spectacles into the above spectacles.
The eyeglass vertical position adjusting device proposed by the present inventor has different relative positions in which the upper range power that is a predetermined range at the upper part and the lower range power that is a predetermined range at the lower part thereof are different. It is used in combination with eyeglasses having a main body including a fixed lens for both left and right eyes. The eyeglass vertical position adjusting device moves the position of the main body up and down as time passes, so that the upper range of the lens is on the line of sight when the user wearing the eyeglasses looks at the front. And the lower range are alternately positioned, a nose pad that contacts the nose bridge of the user, and attached to the nose pad, and the main body portion of the glasses at the support site A nose pad support that supports the nose pad support, and the nose pad support moves up and down over time, thereby changing the distance between the main body and the nose pad. Thus, the position of the main body of the glasses is moved up and down.
Alternatively, the eyeglass vertical position adjusting device proposed by the inventor of the present application is different from each other in that the upper range power, which is a predetermined range at the upper portion, and the lower range power, which is a predetermined range at the lower portion, are different. It is used in combination with a main body including a right and left binocular lens whose position is fixed, and glasses provided with two temples. In this case, the eyeglass vertical position adjusting device moves the position of the main body portion up and down as time passes, so that the lens is placed on the line of sight when the user wearing the eyeglasses looks at the front. A vertical position adjustment device for eyeglasses for alternately positioning the upper range and the lower range, and a main body shaped to be able to be locked to the user's ear, and the main body is engaged with the user's ear The temple support that is supported by the temple support by raising and lowering the temple support and the temple support that supports the temple on the side on which the main body of the glasses worn by the user is locked. Means for changing the angle of the temple in a vertical plane including the temple, and the temple support is adapted to move up and down over time, whereby the body of the glasses Position of is adapted to vertically.

  Hereinafter, preferred first and second embodiments of the present invention will be described in detail with reference to the drawings. In the descriptions of both embodiments, common reference numerals are used for common objects, and redundant descriptions are omitted in some cases.

<< First Embodiment >>
FIG. 1 shows a perspective view of the glasses 1 according to the first embodiment as seen from the back direction (the direction facing the user's face when the glasses 1 are used).
The glasses 1 of this embodiment include a frame 110, although not necessarily limited thereto. The two frames 110 are a right-eye frame 110R and a left-eye frame 110L. A lens 120 is fitted inside the frame 110.
The two lenses 120 are a right-eye lens 120R and a left-eye lens 120L. Both lenses 120 are divided into an upper range that is a predetermined range at the upper part thereof and a lower range that is a predetermined range at the lower part thereof. In this embodiment, the portion above the broken line shown in the lens 120 is the upper range, and the lower portion is the lower range. The power is different between the upper range and the lower range of the lens 120.
In this embodiment, the upper range and the lower range of the lens 120 are each set in which the power in the upper range and the power in the lower range are both positive, both negative and positive / negative, and one is positive or negative and the other is 0. It does not matter if they are combined.
In the lens, both the power in the upper range and the power in the lower range may be uniform throughout, or at least one of the power in the upper range and the power in the lower range may not be uniform. .
In the lens 120 of this embodiment, the power in the upper range and the power in the lower range are both uniform. The difference between the power in the upper range and the power in the lower range of the lens 120 of this embodiment is 0.3D to 4.0D. This difference is 0.3D to 1.0D in general, and 0.4D to 0.6D is considered to be the most general. This difference is caused by the ability to adjust the focus of the user's eye expected to wear the glasses 1 (the ability to adjust the focus of the user's eye expected to wear the glasses 1 is expected. (It may be a numerical value.) About 1/6 to 1/3.
In this embodiment, the difference between the power in the upper range and the power in the lower range of the lens 120 is 0.5D. Further, in the lens 120 of this embodiment, one of the upper range and the lower range has a power suitable for a user who is scheduled to use the glasses 1. This power may be different between the right-eye lens 120R and the left-eye lens 120L.
More specifically, in this embodiment, the powers in the upper range of the right-eye lens 120R and the left-eye lens 120L are set to frequencies appropriate for the user, and the right-eye lens 120R and the left-eye lens are set. The frequency in the lower range of 120L is set to be smaller by 0.5D than the frequency in the upper range. The reason that the frequency paired with the frequency suitable for the user is set to be smaller than the frequency suitable for the user is that it forces the user to far vision.
For example, if the user who intends to use the glasses 1 does not need to correct the eyesight, the power of the upper range of the lens 120 is set to 0.0D, and the power of the lower range is set to −0.5D. Can do. If the user who intends to use the glasses 1 needs to correct light myopia, the power of the upper range of the lens 120 can be set to -2.0D, and the power of the lower range can be set to -2.5D. If the user who intends to use the glasses 1 needs to correct light hyperopia, the power of the upper range of the lens 120 can be set to 2.0D, and the power of the lower range can be set to 1.5D.

The lens 120 in this embodiment is as described above, but can be replaced with the following.
The lens 120 in this case is not uniform in both the upper range power and the lower range power. The lens 120 is configured such that both the power in the upper range and the power in the lower range gradually increase or decrease from above to below. More specifically, the lens 120 is configured such that both the power in the upper range and the power in the lower range gradually decrease from the upper side to the lower side. Further, in this lens, the power at the lower end of the upper range of the lens 120 and the power at the upper end of the lower range of the lens 120 are substantially the same, so that the power gradually decreases from the top to the bottom as a whole. It is a progressive focus lens.
The lens 120 has a frequency that is suitable for the user. In the lens 120 of this embodiment, although not necessarily limited to this, the power of the central portion in the vertical direction of the lens 120 is a power suitable for the user who intends to use the glasses 1. The power of the lens 120 of this embodiment is the largest at the upper end portion and the smallest at the lower end portion. The difference between the power at the upper end portion and the power at the lower end portion of the lens 120 of this embodiment is 0.3D to 1.0D for general purposes, and 0 is considered to be the most general purpose. .4D to 0.6D. This difference was determined based on about 1/6 to 1/3 of the ability to adjust the focus of the user's eye expected to wear the glasses 1 as in the case described above.
For example, if the user who is scheduled to use the glasses 1 does not need to correct the visual acuity of the eye, the lens 120 has a power at the upper end portion of the lens 120 of 0.25D and a power at the lower end portion. −0.25D, and the same applies to the following, but the frequency can be gradually decreased gradually from the upper end toward the lower end. If the user who intends to use the glasses 1 needs to correct light myopia, the power at the upper end of the lens 120 may be set to -2.0D, and the power at the lower end may be set to -2.5D. it can. If a user who intends to use the glasses 1 needs to correct light hyperopia, the power at the upper end of the lens 120 can be set to 2.0D, and the power at the lower end can be set to 1.5D.

  The frame 110R and the frame 110L are connected to each other by a bridge 130. In addition, although the spectacles 1 of this embodiment are provided with two temples similar to those of the normal spectacles 1 on the outer sides of the frame 110R and the frame 110L, illustration thereof is omitted.

In this embodiment, a locking ring 140 formed in a ring shape is attached to the bridge 130. The locking ring 140 is configured so that a shaft rod described later can be locked on its inner surface. The locking ring 140 can move the shaft bar in the vertical direction by ultrasonic waves generated by a vibrator (not shown) connected to the locking ring 140. With such a structure of the locking ring 140, the shaft rod is positioned at an appropriate position in the length direction and then locked to the locking ring 140.
A control unit 150 is also attached to the bridge 130. The control unit 150 controls the positioning of the vertical position of the shaft bar with respect to the locking ring 140. Although not necessarily limited to this, the control unit 150 in this embodiment houses a CPU, ROM, RAM, and interface (not shown). Since these may be general-purpose ones, a detailed description will be omitted. However, by sending a signal generated by the CPU executing the program recorded in the ROM to the vibrator described above via the interface, the vibrator It vibrates at a frequency as required, whereby the shaft rod moves upward or downward, or is locked to the locking ring 140 while being positioned at an appropriate location. The RAM is used as a work area when the CPU executes a program.

The shaft rod 160 is not necessarily limited to this, but in this embodiment, the shaft rod 160 is a rod-shaped body made of resin and having a circular cross section. The diameter of the shaft rod 160 is slightly smaller than the inner diameter of the locking ring 140.
A nose pad 170 is provided at the lower end of the shaft rod 160. The nose pad 170 may be a known one. The nose pad 170 is connected to the lower end of the shaft rod 160 via a thin rod-shaped support rod 171.

Next, a method for using the glasses 1 of the first embodiment will be described.
A user who uses the glasses 1 wears the glasses 1 in daily life, for example.
Then, the CPU of the control unit 150 executes the above-described program. Thereby, the vibrator vibrates at a frequency as required, and thereby the shaft rod 160 moves upward or downward. That is, in this embodiment, the vertical movement of the shaft rod 160 is realized by configuring an ultrasonic linear actuator with the locking ring 140, the control unit 150, and the shaft rod 160.
The shaft 160 reciprocates between two positions: an upper position where the upper portion is locked to the locking ring 140 and a lower position where the lower portion is locked to the locking ring 140 below the upper position. This reciprocation of the shaft rod 160 may be continuously and slowly performed (for example, by moving from the lower position to the upper position and from the upper position to the lower position for several minutes (about 1 to 5 minutes)). The upper position and the lower position may be stopped for a while (for example, several minutes), and the movement from the upper position to the lower position may be performed intermittently in a short time such as 1 second. In any case, the reciprocating motion of the shaft 160 is determined by a program executed by the CPU. If a progressive focus lens as described above is adopted as the lens 120 of the glasses 1, the reciprocation of the shaft rod 160 is preferably performed slowly and continuously.
When the shaft 160 is in the upper position, the distance from the nose pad 170 to the locking ring 140 or the bridge 130 of the glasses 1 is the longest. Therefore, the eyeglasses 1 worn by the user are in a state of slightly advancing upward, and the lower range of the lens 120 is positioned on the line of sight when the user looks at the front. On the other hand, when the shaft rod 160 is in the lower position, the distance from the nose pad 170 to the locking ring 140 or the bridge 130 of the glasses 1 is the shortest. Therefore, the glasses 1 worn by the user are slightly lowered downward, and the upper range of the lens 120 is positioned on the line of sight when the user looks at the front.
Such a vertical movement of the lens 120 allows the user to alternately repeat the state of viewing the outside world through the upper range of the lens 120 and the state of viewing the outside world through the lower range of the lens 120.

<Modification 1>
In the above embodiment, the ultrasonic linear actuator formed by the locking ring 140, the control unit 150, and the shaft rod 160 is used to realize the vertical movement of the lens 120 of the glasses 1.
However, various other configurations are known as linear actuators. For example, as a linear actuator, a piezoelectric linear actuator, a linear actuator using a worm gear that changes rotational motion to linear motion, a linear actuator that uses a cam that also changes rotational motion to linear motion, and the like are known. It will be readily understood by those skilled in the art that the upper limit movement of the lens 120 of the glasses 1 can be realized using these. When the ultrasonic linear actuator is replaced with the above-described known linear actuator, it is necessary to appropriately change the configuration of the locking ring 140 and the shaft rod 160. For example, when a cam that rotates in a plane parallel to the lens 120 is used, the cam is attached such that the rotational axis of the cam is relative to the lens 120 of the glasses 1 (for example, the bridge 130). And a guide for killing the left and right movements of the left and right and up and down movements generated by the rotational movement of the cam, and a nose on the moving body that is guided by the guides and moves up and down. The pad 170 may be attached. Alternatively, if a linear actuator using a worm gear is employed, a worm with the locking ring 140 fixed relative to the lens 120 of the glasses 1 (for example, attached to the bridge 130, the frame 110, etc.). The wheel may be provided with a mechanism for replacing the shaft rod 160 with a worm wheel and maintaining the orientation of the nose pad 170 constant regardless of the rotation of the shaft rod 160.

<Modification 2>
In Modification 2, an attachment 1A for causing general glasses that do not move the lens up and down to function as the glasses 1 of the first embodiment that moves the lens up and down 120 will be described.
Roughly speaking, the attachment 1A is obtained by removing members included in normal glasses, that is, the frame 110, the lens 120, the bridge 130, and a temple (not shown) from the glasses 1 of the first embodiment. . The attachment 1A is used in combination with a frame 110, a lens 120, a bridge 130, and existing glasses 103 having temples (not shown) (for example, ordinary glasses that are generally used) as shown in FIG. Such existing glasses 103 are made to function as the glasses 1 of the first embodiment. In order to make this possible, the lens 120 included in the existing glasses 103 is the same as the lens 120 included in the glasses 1 in the first embodiment.

The attachment 1 </ b> A according to Modification 2 includes a locking ring 140, a control unit 150, a shaft rod 160, a nose pad 170, and a support rod 171. These are all the same as those provided in the glasses 1 in the first embodiment. The locking ring 140 and the control unit 150 are fixed to each other.
This attachment 1 </ b> A includes a connection unit 180. The connection part 180 is for fixedly connecting the locking ring 140 and the control part 150 of the attachment 1 </ b> A to the existing glasses 103. In this embodiment, the connection portion 180 is a clip that holds the bridge 130 of the existing glasses 103 at the lower end thereof.

A method of using this attachment 1A will be described.
The attachment 1A is connected to the existing glasses 103 using the clip 180 in use. Specifically, this connection is performed by sandwiching both ends of the bridge 130 from above with the lower ends of the two clips 180. In this state, the locking ring 140 and the control unit 150 of the attachment 1 </ b> A are fixed in a relative position with respect to the existing glasses 103.
The user puts on the existing glasses 103 to which the attachment 1A is attached. Then, as in the case of the first embodiment, the CPU of the control unit 150 executes the program recorded in the ROM, thereby moving the shaft rod 160 upward or downward. As a result of the vertical movement of the lens 120 that occurs, the user can alternately repeat the state of looking at the outside through the upper range of the lens 120 and the state of looking at the outside through the lower range of the lens 120.

<< Second Embodiment >>
The second embodiment is an attachment for making general existing glasses that do not move the lens up and down into glasses that move the lens up and down.
The attachment 2A of this embodiment is used as a pair for the right ear and the left ear, but both are not necessarily limited to this, but have the same configuration. Therefore, in this embodiment, the attachment 2A for the right ear is used. The configuration will be described.
The attachment 2A is as shown in FIG. 3 and FIG. 3 is a perspective view of an attachment 2A for the right ear, and FIG. 4 is a perspective side view thereof.

The attachment 2A includes a locking case 210. The locking case 210 has a shape that can be locked to the user's ear. As the shape of the locking case 210, the shape of an ear-hook type earphone that has been widely used in recent years may be used as a reference.
The locking case 210 of this embodiment is made of resin and has a hollow U shape with a rectangular cross section. The thickness of the locking case 210 in the depth direction in FIG. 3 is set to about 7 to 8 mm so that the locking case 210 can be put on the ear.
A front slit 211 is provided on the front side (the right side in FIG. 3) when the locking case 210 is used. The front slit 211 has a width from which the temple T of the existing glasses can be inserted. A rear slit 211 is provided on the rear side when the locking case 210 is used. The rear slit 212 has a width that allows the temple T of the existing glasses inserted from the front slit 211 to be exposed therefrom. In the front slit 212 and the rear slit 212, the temple T of the existing spectacles that is inserted through the front slit 211 and exposed from the rear slit 212 and penetrates the locking case 210 can rotate as described later. Thus, a certain length is given in the vertical direction.

A control unit 220 is provided inside the locking case 210. The control unit 220 controls the rotation and positioning of the cam described later. Although not necessarily limited to this, the control unit 220 in this embodiment houses a CPU, a ROM, a RAM, and an interface as in the case of the first embodiment.
Inside the locking case 210, a cam 230 having an elliptical cross section is disposed. The cam 230 can rotate about the shaft 231. The cam 230 is rotated by a motor (not shown). The controller 220 described above performs rotation and positioning of the cam 230 by controlling the motor. However, the power for rotating the cam 230 is not limited to the motor. The cam 230 rotates between a position indicated by a solid line in FIG. 4 and a position indicated by a two-dot chain line in FIG. When the cam 230 is in the position indicated by the solid line in FIG. 4, the temple T of the existing glasses that are in a state of passing through the locking case 210 is set to a substantially horizontal angle. When the cam 230 is at the position indicated by the dotted line, the temple T of the existing glasses is set to a slightly upward angle.

Next, the usage method of this attachment 2A is demonstrated.
To use the attachment 2A, the temple T on the right side of the existing glasses is inserted from the front slit 211 of the locking case 210 of the attachment 2A for the right ear and exposed from the rear slit 212, so that the locking case 210 is It is assumed that it has penetrated. The same applies to the attachment 2A for the left ear. The existing spectacles used in combination with the attachment 2A may basically be general-purpose spectacles, but the lenses have different powers in the upper range and the lower range as in the case of the first embodiment. It is supposed to be.
In this state, the user puts on the existing glasses together with the attachment 2A. The concave portion of the U-shaped attachment 2A comes into contact with the upper surface of the base portion of the ear.
In this state, the user looks at the outside through the lens of the existing glasses. Then, as in the case of the first embodiment, the CPU of the control unit 220 executes the program recorded in the ROM, thereby driving the motor. In this embodiment, the left and right motors are driven synchronously. As the motor is driven, the cam 230 rotates, and the temple T of the existing glasses supported by the cam 230 from the lower side is indicated by a two-dot chain line in FIG. 4 from the position indicated by the solid line in FIG. Reciprocate between different positions. In this embodiment, the temple T stops at a position indicated by a solid line and a position indicated by a two-dot chain line in FIG. 4 for 3 minutes, and from one position to the other position for a shorter time, for example, 3 seconds. Move by degree. However, the way of movement of the temple T is not limited to this. For example, the temple T may perform movement without interruption such as simple vibration.
When the temple T is positioned at a substantially horizontal angle indicated by the solid line in FIG. 4, the upper range of the lens is positioned on the field of view when the user looks at the front, and is indicated by a two-dot chain line in FIG. When the temple T is positioned at a slightly upward angle, the lower range of the lens is positioned on the field of view when the user looks at the front. As a result, the user can alternately repeat the state of viewing the outside world through the upper range of the lens and the state of viewing the outside world through the lower range of the lens.

<Modification 3>
The attachment 2A of the second embodiment is separate from the existing glasses, and is used in combination with the existing glasses when in use.
However, the existing glasses and the attachment 2 </ b> A are not necessarily separated from each other and may be integrated. Such glasses with the attachment 2A, like the glasses 1 of the first embodiment, force the user to see the outside through the upper range of the lens and to see the outside through the lower range of the lens. Will be repeated.

<Modification 4>
In the attachment 2A of the second embodiment, the angle of the temple T is changed by the rotation of the elliptical cam 230.
However, the mechanism for changing the angle of the temple T is not limited to this. For example, when the temple T is placed on the upper part of the trident rod-like body and the rod-like body is moved up and down, the angle of the temple T can be changed. A mechanism for changing the angle of the temple T may be appropriately selected.

1 is a perspective view of eyeglasses according to a first embodiment of the present invention. The perspective view of the attachment by the modification 2. FIG. The perspective view of the attachment by a 2nd embodiment of the present invention. The perspective side view of the attachment by 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Glasses 1A Attachment 2A Attachment 110 Frame 120 Lens 130 Bridge 140 Locking ring 150 Control part 160 Axle rod 170 Nose pad 210 Locking case 211 Front slit 212 Rear slit 220 Control part 230 Cam

Claims (7)

A pair of glasses including a main body unit including right and left binocular lenses whose relative positions are fixed,
The lens has an upper range power that is a predetermined range above the lens and a lower range power that is a predetermined range below the lens.
By automatically moving the position of the main body portion up and down over time, the upper range and the lower range of the lens are on the line of sight when the user wearing the glasses looks at the front. A position adjusting means for alternately positioning,
In the lens, both the power in the upper range and the power in the lower range are uniform, and one of them is a power suitable for the user, and the other power is 0.3D to a power suitable for the user. It is supposed to be shifted in either positive or negative direction by 4.0D.
glasses. A pair of glasses including a main body unit including right and left binocular lenses whose relative positions are fixed,
The lens has an upper range power that is a predetermined range above the lens and a lower range power that is a predetermined range below the lens.
By automatically moving the position of the main body portion up and down over time, the upper range and the lower range of the lens are on the line of sight when the user wearing the glasses looks at the front. position adjusting means to be positioned alternately provided with a,
The lens is configured such that the power of the upper range and the power of the lower range gradually increase or decrease gradually from above to become a progressive focus lens as a whole, and the upper range of the lens Alternatively, the power of any portion of the lower range is set to a power suitable for the user, and the difference between the power of the portion having the highest power and the power of the portion having the lowest power is 0. The range is 3D to 4.0D.
glasses. In the lens, both the power in the upper range and the power in the lower range are uniform, and both are not zero.
The spectacles according to claim 1. Of the lens, the frequency of the portion that intersects the line of sight of the user looking at the front is a frequency suitable for the user,
The glasses according to claim 2 . Comprising a nose pad that contacts the nose bridge of the user wearing the glasses,
The position adjusting means is configured to connect the main body and the nose pad, and is configured to change a distance between the main body and the nose pad.
The spectacles in any one of Claims 1-4 . The nose pad includes a rod body that is a rod-shaped body extending upward from the nose pad, and the main body portion includes a nose pad support portion that supports an upper portion of the rod body,
The rod body and the nose pad support portion constitute a linear actuator, and by moving and positioning the rod body in the length direction relative to the nose pad support portion, the main body portion and the nose pad The change of distance is realized,
The spectacles according to claim 5 . With two temples,
The position adjusting means is locked to an ear of a user wearing the glasses, and includes means for changing the angle of the temple on the ear side in a vertical plane including the temple. Configured as
The spectacles in any one of Claims 1-4 .

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