JP2010102007A - Simple rimless glasses - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such a problem that in rimless glasses in which a connection member for connecting right and left lenses and glass temples are formed from a soft synthetic resin, when the glass temples are extended to a use position from a stored position, the outer edges of the lenses move forward and away from the eyeballs by the reaction force as a result of the extension, and consequently, a field of view, corrected by the lenses, is narrowed. <P>SOLUTION: The temple has a part to be hooked on an ear at one end. The other end of the temple is firmly fixed to the outer edge of each rimless lens. The two lenses are connected at their inner edges by a connecting member formed from an elastic synthetic resin. In the rimless glasses having a configuration described above, the mounting positions of the two lenses are free, and the outer edges are inclined toward the face side relative to the inner edge. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an edgeless spectacle having no lens frame for holding the periphery of the lens, and more particularly to a simple one having no folding pin on the ear hook connected to the lens.

  Conventionally, in order to reduce the weight of edgeless glasses, it has been known to reduce the weight by horizontally cutting the left and right lenses from a position 3 to 5 mm from the optical axis (see Patent Document 1).

  In recent years, the weight has been further reduced, and the structure of the hinge for folding the temple is omitted when housing the lenses and frames that make up the glasses. Molded with a high-quality plastic is commercially available.

  There, a very flexible temple is used to fit the case when it is not in use, and the temple bends over its entirety, so even when the eyeglass is not in use, it is between the left and right temples. The distance is set to be quite close. Therefore, when wearing glasses, the distance between the temples is pushed outward to the width of the head and used.

  Therefore, the reaction force when the temple is expanded elastically deforms the left and right lenses and the lens connecting tool, thereby changing the angle of the lens with respect to the eyeball. As shown by the two-dot chain line in FIG. 5, when the temple is in a free state, the left and right lenses are generally on the same plane, or the outer edge is at a position A slightly deviated toward the eyeball E side. However, as shown by the solid line in the figure, the outer edge portions of the left and right lenses move from the face F to the position D where they move forward.

  Such movement of the left and right lenses causes a problem that the field of view corrected by the lens of the eyeball E changes from the angle α to the angle β and narrows the field of view corrected by the lens.

As an improvement measure, the lens connector and temple that connect the left and right lenses can be solved by using a material with high rigidity as in the past. However, as in the conventional case, a large bending stress is applied to the left and right lenses unless a hinge is used. May be deformed or damaged, and may offset the advantages of this type of edgeless glasses.
JP-A-6-294945

  The problem to be solved is that the simple rimless glasses made as a result of the weight reduction and the simplification of the configuration of the conventional simple rimless glasses, the field of view is narrowed due to the change of the lens position that occurs when wearing. An excessive reaction force acts on the lens to cause deformation.

  In the present invention, the other end of the temple provided with an ear hook at one end is fixed to the outer edge portion of the lens without the edge, and the left and right pair of the lenses are connected at the inner edge portion by a resilient synthetic resin connecting member. The most important feature is that the connection angle by the connection member when the left and right lenses are not used is that the outer edge portion is inclined to the face side with respect to the inner edge portion.

  According to the present invention, since the temple and the connecting member for connecting the left and right lenses are made of a material having excellent flexibility, the temple can be bent by utilizing their elasticity, and the glasses are accommodated in the case. Therefore, since the structure for folding the temples required, that is, the hinge portion is not required, the number of parts is small, the structure is simple and the manufacture is easy, and the glasses can be provided at a low price.

  In addition, although the flexibility of the temple and the connecting member is improved, it is manufactured in advance in consideration of deformation at the time of wearing, so that the field of view corrected by the lens is narrowed even if they are elastically deformed. There is an effect that there is nothing.

  Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 10 denotes simple edgeless glasses using the present invention. The simple edgeless glasses 10 have a pair of left and right lenses 14 and 14 for correcting myopia connected to each other by a connecting member 12.

  The connecting member 12 is made of a thermoplastic relatively soft synthetic resin, and includes a central curved portion 12a for avoiding interference with the wearer's nose, and a short connector 12b protruding left and right therefrom. Have. A nose pad 12c is attached to the curved portion 12a by a thin stainless steel wire 12d so as to face the face F of the wearer.

  The left and right lenses 14 and 14 are used for correcting myopia, and as is well known, the periphery is cut out from a circular lens material and is formed in a horizontally long shape as shown in FIG. That is, the upper side has a substantially chamfered square shape that is substantially the same shape as normal glasses, and the lower side 14c is cut off in a substantially horizontal direction slightly below the optical axis Z to form a straight line. Thus, the lenses 14 and 14 for correcting myopia which are suitable for presbyopia are produced.

  The connecting member 12 and the left and right lenses 14 and 14 are formed by passing two small protrusions provided in the connector 12b through two small holes formed in the inner edge portion 14a of the lens and passing through the portions. It is melted by heating to keep the outer diameter enormous. This connecting means is commonly used and will not be described in detail.

  When the left and right lenses 14, 14 are connected to the connecting member 12, as shown by the solid line from the position where the left and right lenses 14, 14 are generally aligned on the same plane, as shown by the two-dot chain line in FIG. 3, The outer edge portion 14b is set between a position where the outer edge portion 14b is retracted from the inner edge portion 14a in the direction of the face F and the plan view is substantially in an eight-letter shape. In addition, the magnitude | size of the angle which the outer edge part 14b recedes to the face F side is determined by the hardness of the said connection member 12, and the request | requirement on a design.

  The temple 16 coupled to the outer edge portion 14b of the lens is formed from a thermoplastic synthetic resin having great elasticity, and the two pieces formed in the outer edge portion 14b of the lens as in the case of the connecting member 12 described above. Two small projections provided on the temple 16 are passed through the small hole, and the penetrated portion is heated and melted to enlarge the outer diameter and prevent the projection.

  The temple 16 is made of a thin resin wire that is flexible and lightweight as a whole. As shown in FIG. 1, when the simple edgeless glasses 10 are not used, the temple 16 becomes an unused shape A drawn by a solid line in the drawing, and when stored in a spectacle case (not shown), A curved shape B is obtained. When the spectacles are worn, the shape C is enlarged to the size of the head H.

  The temple 16 is separable into a front portion 16a connected to the lens 14 and a rear portion 16b having an ear hooking portion at a connecting portion 16d provided at a substantially center in the longitudinal direction. That is, as shown in FIG. 3, the stainless steel wire 16c protruded from the end of the front portion 16a is loosely fitted to the cylindrical rear portion 16b, and is easily pulled out by friction between them. It is fixed loosely so as not to be damaged. Therefore, the length of the temple 16 can be adjusted by changing the length of the wire 16c inserted into the rear portion 16b.

  Since this embodiment is configured as described above, at least the temple 16 is bent into the storage state (B in FIG. 1) or is in a free state for preparation for use (A in FIG. 1). In either case, the left and right lenses 14 and 14 are in positions where the outer edge portion 14b is closer to the face F side than the inner edge portion 14a.

  Therefore, when the frameless glasses 10 are attached and the distance between the left and right temples 16 and 16 is increased from the free state, the left and right lenses 14 and 14 rotate around the connecting member 12 as the temples 16 and 16 are deformed. The outer edge portion 14b moves forward, but in this case as well, the outer edge portion 14b does not move forward greatly beyond the inner edge portion 14a, and the correction visual field of the wearer is not narrowed.

  Further, the edgeless eyeglasses 10 can generally omit the folding hinge portion provided on the temple without narrowing the correction field of vision of the wearer. There is an effect that the glasses 10 can be manufactured.

It is a top view at the time of non-use of the simple edgeless spectacles which showed the implementation method of this invention. It is the front view. It is a top view equivalent to FIG. 1 which shows a temple when wearing spectacles. 2 is an enlarged cross-sectional view showing a main part of the temple 10 in an enlarged manner. FIG. It is a top view equivalent to FIG. 1 which shows the conventional simple edgeless spectacles.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 rimless spectacles 12 connection member 12a curved part 12b connector 12c nose pad 12d stainless steel wire 14 lens 14a inner edge part 14b outer edge part 14c straight line 16 temple 16a front part 16b rear part 16c wire 16d coupling part A non-use shape B strongly curved shape C Enlarged shape E Eyeball F Face Z Optical axis

Claims (2)

  The other end of the temple provided with an ear hook at one end is fixed to the outer edge of the lens without a frame, and the left and right pairs of the lens are connected at the inner edge by an elastic synthetic resin connecting member. The simple edgeless glasses according to claim 1, wherein the connection angle by the connection member when the left and right lenses are not used is such that the outer edge portion is inclined to the face side with respect to the inner edge portion.   2. The temple according to claim 1, wherein the temple is made of a synthetic resin, and includes a rear half portion provided with the ear hooking portion and a front half portion coupled to a lens, and a front end of the rear half portion is formed in a cylindrical shape. Simple frameless glasses that are slidably fixed in a longitudinal direction on a metal wire fixed to a part.

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