JP6634260B2 - Lightweight optometry frame - Google Patents

Description

  The present invention relates to an optometry frame, and more particularly to an optometry frame for attaching a test lens for optometry and checking the degree of vision correction.

  The optometry frame is an indispensable optical inspection instrument for preparing eyesight correction glasses having a comfortable wearing sensation that is appropriately corrected, and is always provided at an optometry shop.

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  In most cases, the test lens to be attached to the test lens frame of the optometry frame is made so that its optical center is located at the center. The center must match the position of the pupil, and for this purpose, the distance between the pair of test lenses can be changed according to the distance from the center axis of the subject's face to the pupil (pupil distance). It is necessary. However, in many conventional optometry frames, a pair of left and right test lens frames are moved to the left and right by the same distance equally.

  Human faces are not necessarily symmetrical.Strictly speaking, the distance from the center line of the face to the left and right eye holes is usually different. You need to be able to move. In other words, with a conventional optometry frame that can only move the test lens frame evenly to the left and right, accurate optometry is impossible, and in the case of a person with a large difference in left and right pupil distance or a person with a strabismus, etc. With the test frame, only rough eye examination work was possible, and accurate eye examination work was not possible.

For this reason, optometry frames in which the left and right test lens frames can be independently slid in order to enable accurate optometry work have been proposed. Knobs for adjustment are mounted horizontally on both ends of a rod-shaped holder member that holds the test lens frame, and by turning a long metal screw extended from this knob,
The test lens frame slide member screwed to the long screw is moved in the left-right direction.

  However, the use of a pair of left and right metal long screws inevitably increases the weight of the entire optometry frame as compared to the conventional type, in which the test lens frame moves evenly in the left and right directions. It cannot be denied that there is a serious problem that the weight of the test lens is 70 g or more without the test lens, and the weight of the test lens exceeds 100 g. In addition, the pair of left and right knobs for adjusting the left and right pupil distance are mounted sideways outward, so that the operator facing the subject can operate the left knob with the right hand and the right knob with the left hand. It was difficult to use.

  The present inventor has conducted intensive studies to solve the above-mentioned problems of the optometry frame of the type in which the left and right pupil distances can be independently adjusted independently, and as a result, a new optometry frame overcoming these problems has been developed. It has been successfully developed and is proposed here as the present invention.

  A hard synthetic resin horizontally extending inward from the upper part of the tongue-shaped test lens frame holding piece provided upward from the upper edge of the pair of ring-shaped test lens frames is mainly used. A left and right slide is inserted into a guide groove formed in a lower surface of a prismatic holder member positioned between a pair of test lens frames, and a front and a rear surface of the holder member. The circular gear (pinion) is meshed with the teeth of the toothed rod (rack) in the guide groove by the rotation shaft pivotally supported by the shaft and the front surface of the holder member so as to be connected to the rotation shaft. By rotating the provided knob, the pair of test lens frames can be independently moved in the left and right direction by an arbitrary distance, and downward from the center of the holder member. And vertical set with liftable state nose pad up or down, from the outside periphery of the test lens frame by constructing the eye frame by extending the temples toward the rear, the above-mentioned problems are eliminated.

  As with the conventional test frame, the selected test lens is set on the test lens frame and attached to the subject's face for use in optometry, but the knob is rotated clockwise or counterclockwise. By aligning the Y axis passing through the optical center of the test lens with the center of the pupil of the subject and rotating the knob on the upper surface of the nose pad to move the nose pad body up and down, the optical center of the test lens is By aligning the X axis passing through with the center of the subject's pupil, the optical center of the test lens and the subject's pupil can be accurately matched. Therefore, much more precise optometry can be performed compared to a conventional test frame.

  In addition, since the main part of the tooth rack (rack) constituting the slide mechanism of the test lens frame is made of a hard synthetic resin, the weight of the entire test frame can be reduced, and the test frame can be stably mounted and held on the face. It also has a possible effect.

  A toothed rod (rack) mainly made of a hard synthetic resin is provided on an upper part of the test lens frame, and is engaged with a circular gear (pinion) supported by a holder member, and is provided on a front surface of the holder member. The greatest feature resides in that the test lens frame can be slid left and right separately by rotating the knob.

FIG. 1 is a perspective view in which a part of Example 1 of the lightweight optometry frame according to the present invention is seen through.
In the figure, reference numeral 1 denotes a pair of left and right ring-shaped test lens frames, to which a test lens 2 can be detachably mounted. Reference numeral 3 denotes a holder member for holding the pair of test lens frames 1, which is mainly made of a prismatic hard synthetic resin, and is provided with a reinforcing metal plate if necessary. A guide groove 4 having a rectangular cross section is formed in the longitudinal direction.
Further, a tongue-shaped test lens frame holding piece 5 is attached upward from the outer upper edge of the test lens frame 1, and the test lens frame holding piece 5 has teeth from the upper end toward the inside. A rod (rack) 6 extends horizontally. The teeth 7 of the tooth shaft (rack) 6 are formed toward the lower surface.

On the other hand, reference numeral 8 denotes a circular gear (pinion), which is rotatably supported by a rotating shaft 11 pivotally supported by a front surface 9 and a rear surface 10 of the holder member 3 and is meshed with the teeth 7 of the tooth shaft (rack) 6. I have.
A knob 12 is provided at the front end of the rotating shaft 11 so as to protrude from the holder member 3. By rotating the knob 12, a circular gear (pinion) 8 is rotated via the rotating shaft 11. Is rotated, and the toothed rod (rack) 6 meshed with this is slid left and right according to the amount of rotation of the knob 12.
Note that a scale 13 for indicating the moving amount of the test lens frame 1 is provided on the front surface of the holder member 3 along the longitudinal direction, and an index 14 is provided at a corresponding position of the test lens frame holding plate 5. I have.

A column-shaped nose pad holding member 15 is vertically suspended from the center of the holder member 3, and a nose pad body 16 having a gate shape with a lower portion slightly expanding in a right and left direction is vertically movable. We support in.
Reference numeral 20 denotes a knob for moving the nose pad body 16 up and down by rotating the nose pad body 16. The nose pad holding member 12 and the nose pad body 16 are the same as those conventionally existing.
Further, a temple 17 is provided rearward from the outer peripheral edge of the test lens frame 1, and an ear hanging modern 18 is attached to the rear end of the temple 17, and the nose pad body 16 and the ear hanging modern 18 are attached. 18, the optometry frame is mounted on the face of the subject.

  The first embodiment has the configuration as described above. Like the conventional test frame, the selected test lens 2 is set in the test lens frame 1 and attached to the subject's face, and is used for optometry work. By turning the knob 12 clockwise or counterclockwise in accordance with the left and right pupil distances shown as PD-1 and PD-2 in FIG. 1, the optical center of the test lens 2 is provided. By aligning the Y axis passing through 19 with the center of the subject's pupil and rotating the knob 20 to move the nose pad body 16 up and down, the X axis passing through the optical center 19 of the test lens 2 and the subject's pupil are The optometry is performed by aligning the center with the optical center of the test lens 2 and the pupil of the subject exactly. Therefore, much more precise optometry can be performed compared to a conventional test frame.

  Further, the tooth rack (rack) 6 constituting the slide mechanism of the test lens frame 1 is mainly made of a hard synthetic resin, so that the weight of the entire test frame can be reduced, and the test frame can be stably mounted and held on the face. This has the effect that the optometry work can be performed much more accurately and comfortably than conventional ones.

  It is of great value in preparing eyeglasses for correcting vision.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a part of a light-weight optometry frame according to a first embodiment of the present invention, which is seen through.

1. Test lens frame 2. Test lens 3. Holder member 4. Guide groove 5. Test lens frame holding piece 6. Tooth rack (rack)
7. Tooth 8. Circular gear (pinion)
9. Front 10. Rear surface 11. Rotating shaft 12. Knob 13. Scale 14. Indicator 15. Nose pad holding material 16. Nose pad body 17. Temple18. Ear hanging modern 19. Optical center 20. Knob

Claims (1)

  A hard synthetic resin horizontally extending inward from the upper part of the tongue-shaped test lens frame holding piece provided upward from the upper edge of the pair of ring-shaped test lens frames is mainly used. A left and right slide is inserted into a guide groove formed on the lower surface of a prismatic holder member located between a pair of test lens frames, and the front and rear surfaces of the holder member are made of various materials. The circular gear (pinion) is meshed with the teeth of the toothed rod (rack) in the guide groove by the rotation shaft pivotally supported by the shaft and the front surface of the holder member so as to be connected to the rotation shaft. By rotating the provided knob, the pair of test lens frames can be independently moved by an arbitrary distance in the left and right direction, and downward from the center of the holder member. Selfish nose pads are vertical set at lift state vertically, lightweight eye frame, characterized in that temple rearward is extended from the outer perimeter of the test rim.

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