JP2009288683A - Hinge structure of spectacles, and spectacles - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hinge structure of rimless spectacles which comprises a less number of components and is made lightweight, and the rimless spectacles having the hinge structure. <P>SOLUTION: A flat recessed portion 27 which is peripherally long is formed in an outside edge surface 5c-1 of a spectacle lens 5. A lens holding member 23 is formed of a thin flexible material, and has a bearing portion 23A and a lens holding portion 23B (29a, 29b, and 30) in one body. The bearing portion 23A is formed into a tube in a channel shape in plan view to be open at its outer periphery. The lens holding unit 23B is inserted into the recessed portion 27 of the lens 5 and fixed with an adhesive. When a shaft portion 24A is inserted, the bearing portion 23A is elastically deformed inward to decrease in diameter, and presses and holds the shaft portion 24A. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hinge structure having a lens holding function in edgeless eyeglasses and eyeglasses having the hinge structure.

  In recent years, rimless glasses (hereinafter also referred to as rimless glasses) have been attracting attention because of their advantages such as being lightweight, inconspicuous, and not being obstructed by the rim. The spectacles described in Patent Document 1 as an example of edgeless spectacles will be described with reference to the drawings. FIG. 6 is an overall view of the edgeless glasses described in Patent Document 1, and FIG. 7 is a partially enlarged view of the lens holding structure. The frameless spectacles 15 include a spectacle frame and a pair of left and right spectacle lenses (hereinafter also referred to as lenses) 5 and 5 attached to the spectacle frame. The spectacle frames are located on both inner sides of the left and right lenses 5 and 5. , A pair of left and right nose pads 14, 14 attached to the bridge 13, Ji 7 attached to both outer sides of the left and right lenses 5, 5, 4 is configured by a temple 3 or the like connected to be freely opened and closed via 4.

  Of the edge surface 5c of the spectacle lens 5, a non-through hole 11 and a groove 12 are formed in the outer portion (temple side) portion 5c-1 and the inner portion (bridge side) 5c-2 to hold the lens. A pin 16 and a stopper 17 are formed on the member 7 and the bridge 13. Then, by fixing the pin 16 to the non-through hole 11 and the stopper 17 to the groove 12 with an adhesive, the lens holding member Ji 7 and the bridge 13 attach the lens 5 to it. It is held directly at the edge.

  The hinge 4 is generally connected to a connecting tool 8 fixed to the inner surface of the rear end of the chi 7, a connecting tool 9 fixed to the inner surface of the front end of the temple 3, and these connecting tools 8, 9 can be rotated relative to each other. It is comprised by three members of the hinge screw 10 connected to. One or a plurality of top portions having holes through which the hinge screws are inserted are formed in the respective connecting tools 8 and 9, and the top portions of the respective connecting tools are combined so that the respective holes coincide with each other. In this state, a hinge screw 4 is inserted into the hole and is rotatably screwed. Thus, the temple 3 is connected to the wisdom 7 so as to be openable and closable. Joints 18 and 19 are formed at the rear end of Ji 7 and the front end of temple 3, respectively. When the temples are fully opened, the joints are in contact with each other, and the range of rotation is restricted so as not to open any more. is doing.

Japanese Patent No. 3447462

  However, in the conventional edgeless glasses described in Patent Document 1 described above, in order to realize the hinge structure and the lens holding structure, the lens edge surface 5c is processed such as the hole 11 and the groove 12, and the like. A lens holding part (pin 16 and stopper 17) is formed at one end of Ji 7 and a connector 8 and joint 18 are formed at the other end, and a connector 9 and joint 19 are formed at the front end of temple 3. There is. Moreover, the hinge screw for connecting the connection tools 8 and 9 is also required. For this reason, the number of parts is large, and many processes and operations are required to form these parts.

  In particular, for edgeless glasses, it is desirable to form wisdom and temples with thin wires from the viewpoint of weight reduction and making the glasses frame inconspicuous so as not to affect the impression of the wearer's face. There is a case. However, because there is a limit to the miniaturization of the holding structure and hinge structure, even if the wisdom and temples are formed with thin wire rods, the eyeglass frame becomes heavier than the holding structure or hinge structure, or the holding structure or hinge In some cases, the structure is significantly more noticeable than the wire portion.

  Further, in the hinge structure using the hinge screw 10 as in the prior art, the hinge screw is loosened by repeating the opening and closing operation of the temple 3, so that it is necessary to retighten the hinge screw.

  The present invention has been made to meet the above-described conventional problems and demands. The object of the present invention is to provide a lens holding function and a hinge function with a simple structure, a small number of parts, and a reduced weight. It is an object of the present invention to provide a hinge structure of edgeless glasses that can be realized and an edgeless eyeglass having the hinge structure.

  To achieve the above object, the hinge structure of glasses according to the present invention is a hinge structure of edgeless glasses for rotatably mounting a temple to a lens holding member attached to an edge surface of an eyeglass lens. A concave portion that is a non-through hole is formed on the edge surface of the spectacle lens, and a shaft portion that is pivotally supported by the lens holding member is provided at a front end portion of the temple. The lens holding member integrally includes a lens holding portion that is inserted and fixed in the recessed portion, and a bearing portion that pivotally supports the shaft portion of the temple, and the bearing portion of the lens holding member is The both ends in the axial direction are open, and the outer periphery is formed in a cylindrical body having an open portion that is divided in the axial direction. The lens holding portion of the lens holding member forms the outer peripheral side open portion of the bearing portion. From the two open edges Each of the holding portions is formed of a thin plate-like holding piece extending in parallel to the axial direction of the bearing portion, and the holding pieces provided at the respective open end edges are formed so as not to overlap each other in the axial direction of the bearing portion. It is what.

  Further, in the hinge structure of the spectacles according to the present invention, the lens holding portion of the lens holding member includes a plurality of holding pieces provided on at least one open end edge spaced apart in the axial direction of the bearing portion. It consists of a holding piece, and the holding piece provided at the other open end edge is formed so as to be between the plurality of holding pieces provided at the one open end edge.

  In the hinge structure of the glasses according to the present invention, the lens holding member is formed of a transparent resin having elasticity.

  In the hinge structure for eyeglasses according to the present invention, the front end portion of the temple is engaged with the edge surface of the eyeglass lens at one end portion of the shaft portion to restrict the rotation of the temple outward. A movement regulation part is provided.

  Further, the hinge structure of the glasses according to the present invention is such that the front end portion of the temple extends to the other end portion of the shaft portion so as to widen the distance between both temples when the temple is opened. An extension is provided.

  In the hinge structure for eyeglasses according to the present invention, the front end portion of the temple has a shape in which a single wire is bent.

  Furthermore, the eyeglasses according to the present invention have the hinge structure described above.

  According to the present invention, since the shaft portion provided at the front end of the temple is pivotally supported by the bearing portion provided on the lens holding member, it is necessary to provide a connecting tool or connect both members with screws. Therefore, the number of parts can be reduced and the weight can be reduced.

  In the present invention, since the lens holding member is directly fixed to the spectacle lens, it can be applied to edgeless spectacles. Further, since the rotating portion at the front end of the temple has a shape in which the linear material is bent, the number of parts and the number of assembly steps can be further reduced. Further, since the sliding frictional resistance is imparted between the bearing portion and the shaft portion by the elastic deformation of the bearing portion, the temple can be prevented from wobbling. In addition, since the temple is folded from the shaft portion, it does not protrude to the outside of the glasses when folded on the back of the front portion of the glasses, and the width of the front portion can be made smaller than that of normal glasses.

  In addition, since the lens holding member is made of transparent plastic, it can be made inconspicuous even if the lens holding portion is inserted into a concave portion formed in the lens. In addition, since the upper limit of the temple opening is restricted by the contact between the lens edge surface and the turning restricting portion provided at the temple tip, the restriction of the turning range of the temple can be realized with a simple structure.

  In the present invention, it is possible to provide a pair of lightweight glasses with a small number of parts.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
FIG. 1 is a plan view showing an embodiment of edgeless glasses adopting a hinge structure according to the present invention, FIG. 2 is a perspective view of the hinge structure, and FIG. 3 is a natural view of a lens holding member constituting the hinge structure. 4 is an exploded perspective view of the hinge structure, and FIGS. 5A to 5C are diagrams for explaining the opening and closing operation of the temple in the edgeless glasses adopting the hinge structure according to the present invention. FIG.

  In these drawings, the rimless spectacles 20 are composed of a pair of left and right spectacle lenses (hereinafter referred to as lenses) 5 and 5 and spectacle frames that hold these lenses 5 and 5. 5 and 5, a bridge 21 connecting both inner sides, a pair of left and right nose pads 22, 22 attached to the bridge 21, and a temple side (outer) edge surface 5 c-1 of the edge surface 5 c of each lens 5. A pair of left and right lens holding members 23 and 23 to be held, and a pair of left and right temples 24 and 24 pivotally supported by each lens holding member 23 so as to be opened and closed are provided.

  The lens 5 is a lens (for example, a meniscus lens) made of plastic (synthetic resin), and has a lens front surface (convex side optical surface) 5a, a lens rear surface (concave side optical surface) 5b, and an edge surface 5c. Yes. The material of the lens 5 is an allyl lens such as diethylene glycol bisallyl carbonate (C-39) or a copolymer thereof, a polycarbonate lens, an acrylic lens, a bisphenol A derivative lens, a polyurethane lens (poly And synthetic resins such as thiourethane lenses and polyurethane urea lenses. A particularly preferable material for the hinge structure of the glasses 20 according to the present invention is a polyurethane-based lens that is excellent in impact resistance, tensile strength, and the like.

  A concave portion 27 (FIG. 4) is formed on a portion of the edge surface 5c of the lens 5 held by the lens holding member 23, that is, on the temple side edge surface 5c-1. The concave portion 27 is formed of a flat non-through hole formed in the temple side (outer) edge surface 5c-1 of the lens 5 so as to be long in the vertical direction (narrow in the lens thickness direction), and the lens thickness of the concave portion 27. The width in the direction is substantially equal to the thickness of the lens holding portion 23B (the length of the holding pieces 29a, 29b, 30) protruding from the lens holding member 23 (about 0.4 to 1.2 mm), and the recessed portion 27 The width of the lens in the vertical direction is equal to the axial width of the shaft portion 23B of the lens holding portion 23B protruding from the lens holding member 23 (about several times longer than the width of the concave portion 27 in the lens thickness direction). The depth of 27 is set to be approximately equal to the length of the lens holding portion 23B projecting from the lens holding member 23 (the length of the holding pieces 29a, 29b, 30) (about 1.5 to 4.0 mm). . The positions where the concave portions 27 are provided (the opening position and the perforating direction in the lens edge surface) are the thickness from the front inner wall surface 27a of the concave portion 27 to the lens front surface 5a, and the rear inner wall surface 27b of the concave portion 27. To the rear surface 5b of the lens may be appropriately set within a range having a sufficient strength. In this embodiment, an opening of the concave portion 27 is provided at a position (for example, the center) of a predetermined ratio in the width direction of the edge surface 5c with respect to the meniscus lens provided with the edge surface 5c substantially parallel to the optical axis. The direction is set so that the distance between the lens front surface 5a and the front-side inner wall surface 27a is substantially the same at the opening and the rear end of the recessed portion 27 (hereinafter, such perforation direction is referred to the lens front surface 5a). The concave portion 27 is formed to be inclined with respect to the vertical direction of the lens edge surface 5c. The opening position may be set at a predetermined distance with respect to the lens front surface 5a or the rear surface 5b. Also, the perforation direction may be set so that the distance between the lens rear surface 5b and the rear side inner wall surface 27b is substantially the same at the opening and the rear end of the recessed portion 27 (hereinafter, such a perforation direction is referred to as “perforation direction”). And is set so that the concave portion 27 passes through a position (for example, the center) of a predetermined ratio in the thickness direction of the lens 5 between the opening and the deep end of the concave portion 27. (Hereinafter, such a perforating direction is also expressed as being substantially parallel to the lens front surface 5a and the lens rear surface 5b). Further, the drilling direction may be set in a direction that forms a predetermined angle (for example, perpendicular) to the edge surface 5c or the optical axis.

  The lens holding member 23 has a bearing portion 23A that pivotally supports the rotating portion 41A, and a lens holding portion 23B that is inserted into the recessed portion 27 and fixed. The temple 24 includes a rotating portion 41A formed on the front end side and a side portion 41B connected to the rear end of the rotating portion 41A. The rotating portion 41A is a portion connecting the shaft portion 24A formed in a substantially vertical direction and supported by the bearing portion, and the shaft portion 24A and the side portion 41B, and extends in the width direction of the glasses. A width-direction extending portion 43 having a portion and a rotation restricting portion 44 bent and connected to the tip of the shaft portion 24A. Hereinafter, the lens holding member 23 and the rotating portion 41A of the temple 24 will be described in detail.

  The lens holding member 23 is made of a transparent and flexible plastic molded product, and integrally includes a bearing portion 23A and a lens holding portion 23B. The bearing portion 23A is a portion that rotatably holds the shaft portion 24A of the rotating portion 41A, and is a portion that forms a hinge structure together with the rotating portion 41A, and is open to both ends as shown in FIG. It is formed in a C-shaped cylindrical body in plan view having two axial-side opening portions 31a and 31b and one outer-side opening portion 32 opened to the outer periphery. The inner diameter of the bearing portion 23A is set to be substantially the same as or slightly smaller than the outer diameter of the shaft portion 24A with the outer peripheral side opening portion 32 closed. The smaller the inner diameter of the bearing portion 23 is, the larger the sliding frictional resistance (postcard) is when the shaft portion 41A is rotated. Therefore, the inner diameter of the bearing portion 23A may be set so as to obtain an appropriate postscript. The bearing portion 23A is formed so as to maintain a state where the outer peripheral side opening portion 32 is appropriately opened in a natural state. This formation is preferable because the mounting of the shaft portion 41A is facilitated. In addition, the outer peripheral side open portion 32 may be formed so as to be closed in a natural state, and the outer peripheral open portion 32 may be expanded when the shaft portion 24A is attached to the bearing portion 23A.

  The lens holding portion 23B is a portion that is inserted into and fixed to a concave portion 27 provided in the lens, and is a portion that forms a lens holding structure together with the concave portion 27, and is an outer peripheral side opening portion 32 of the bearing portion 23A. Are formed in an elongated rectangular holding piece 29a which is separated from each other in the axial direction of the bearing portion 23A so as not to overlap with each other in the plate thickness direction, and extends integrally and substantially in parallel with each other. 29b and 30. The holding pieces 29a, 29b are provided on the open end edge 33a, the holding pieces 30 are provided on the open end edge 33b, and these holding pieces 29a, 29b, 30 are arranged on the axis of the bearing portion 23A. It protrudes on the outer peripheral side of the bearing portion 23A so as to form a surface to be included.

  The two holding pieces 29a and 29b projecting from the one open end edge 33a project from the upper end and the lower end of the open end edge 33a, respectively, and the other open end edge between the two holding pieces 29a and 29b. A space 35 having substantially the same size as the holding piece 30 projecting from 33b is formed.

  The holding piece 30 protruding from the other open end edge 33b is formed at the center of the other open end edge 33b in the height direction so as to correspond to the space 35, and elastically moves the bearing portion 23A inward. When the outer peripheral side open portion 32 is closed by deformation, it enters the space 35 and overlaps with the holding pieces 29a and 29b in the axial direction of the bearing portion 23A, and one flat lens holding portion together with the holding pieces 29a and 29b. 23B is formed. The lower end surface 37 of the upper holding piece 29a and the upper end surface 38 of the lower holding piece 29b form a guide surface that facilitates entry of the other holding piece 30 into the space 35, respectively. The guide surface 37 of the holding piece 29a is formed on a slope inclined obliquely downward when viewed from the holding piece 30 side, and the guide surface 38 of the holding piece 29b is also at the same angle as the guide surface 37 when viewed from the holding piece 30 side. Is formed on a slope inclined obliquely upward.

  On the other hand, the upper surface 39 and the lower surface 40 of the holding piece 30 are formed on inclined surfaces that are inclined at the same angle and in the same direction as the guide surfaces 37 and 38, respectively, and when the holding piece 30 is fitted in the space 35, the guide surface 37 and 38 face each other closely or closely. In the present embodiment, two holding pieces 29a and 29b are projected from one open end edge 33a and one holding piece 30 is projected from the other open end edge 33b. Can be increased or decreased as appropriate. For example, three or more holding pieces may be provided on one open end edge, and one holding piece less than the number of holding pieces may be provided on the other open end edge. Further, the number of holding pieces provided on one open end edge may be the same as the number of holding pieces provided on the other open end edge. In the case of the same number, when two or more holding pieces are provided on one open end edge, the holding piece provided on the other open end edge in the space between the holding pieces provided on one open end edge A holding piece other than the uppermost or lowermost holding piece is fitted, and one of the holding pieces provided on one open end edge in a space between the holding pieces provided on the other open end edge. A holding piece other than the lowermost or uppermost holding piece may be fitted. When one holding piece is provided on each of the one open end edge and the other open end edge, the other holding piece may be placed above or below the one holding piece. In the above example, adjacent holding pieces are arranged closely, but a gap may be provided between the holding pieces. In the above example, each holding piece has the same shape in front view, but each holding piece may have a different shape (for example, the lens holding portion 23B has a wedge-like shape in front view or a rounded tip). The shape of each holding piece may be different so that the shape of the holding piece is different, and the width of each holding piece may be different, in which case the width of the space is set according to the width of the holding piece to be fitted. It ’s good)

  The lens holding member 23 (at least the lens holding portion 23B) is formed of a transparent resin, and a transparent resin (adhesive) is formed in the gap between the lens holding portion 23B inserted into the recessed portion 27 and the inner wall surface of the recessed portion 27. ) Is preferable in that the lens holding portion 23B and the recessed portion 27 are inconspicuous and are not concerned even if they enter the field of view of the spectacle wearer. More preferably, the lens holding member is made of a colorless and transparent resin, and the colorless and transparent adhesive is used.

  The lens holding member 23 may be colored (including transparent, translucent, and opaque), and a pattern may be provided on the lens holding portion 23B. Further, the lens holding member 23 may be formed of a thin plate on metal or the like.

  The temple 24 is formed in an L shape in plan view by bending a thin wire rod having a diameter of about 0.4 to 1.2 mmφ, so that the front end side bent inward forms a rotating portion 41A and the rear side. The rear end side extending to the side forms a side portion 41B. In other words, the temple 24 is composed of an integrally formed turning portion 41A and side portion 41B, and the turning portion 41A forms a hinge structure together with the lens holding member 23.

  The material of the temple 24 including the rotating portion 41A is Ti or Ti alloy, iron-based alloy, pure gold (24 gold), gold alloy (for example, 14 gold, 18 gold, etc.), white, monel, high nickel, stainless steel. Or a nickel alloy such as bronze or beryllium copper, or a resin such as polyamide, PAS, or PES.

  The rotating part 41A is substantially horizontal and extends in the width direction extending part 43 so as to widen the width in the left-right direction of the spectacles 20, and substantially perpendicularly below the inner end (bridge side end) of the width direction extending part 43. The shaft portion 24A is bent and a rotation restricting portion 44 is formed at the lower end of the shaft portion 24A so as to be bent toward the front of the glasses 20. The side portion 41B is formed at the outer end of the width direction extending portion 43. It is provided integrally. In FIG. 4, a height direction extension portion 41 </ b> C bent downward is provided between the width direction extension portion 43 and the side portion 41 </ b> B. The side portion 41 </ b> B extends substantially horizontally toward the rear of the glasses 20, and the rear end portion is bent obliquely downward to form a modern 46 that can be hung on the wearer's ear.

  The shaft portion 24A of the rotating portion 41A is rotatably supported by the bearing portion 23A of the lens holding member 23. The outer diameter of the shaft portion 24A is smaller than the inner diameter of the bearing portion 23A in the natural state in which the outer peripheral side opening portion 32 of the lens holding member 23 is open, and is substantially equal to the inner diameter of the bearing portion 23A in the state in which the outer peripheral side opening portion 32 is closed. Same or slightly larger. The upper end of the shaft portion 24A is bent substantially vertically and connected to the width direction extension portion 43, and the lower end of the shaft portion 24A is bent substantially vertically and connected to the rotation restricting portion 44. The length of the shaft portion 24A is set to be the same as or slightly shorter than the bearing portion 23A of the lens holding member 23. The width direction extension portion 43 and the rotation restricting portion 44 function to restrict the shaft portion 24A from moving in the vertical direction with respect to the bearing portion 23A. That is, in a state where the shaft portion 24A is pivotally supported by the bearing portion 23A, the end portion on the shaft portion 24A side of the width direction extension portion 43 is in contact with the upper end of the bearing portion 23A. The rotation restricting portion 44 restricts the upper limit position in the height direction of the shaft portion 23A with the end portion on the shaft portion 24A side coming into contact with the lower end of the bearing portion 23A. Therefore, the rotating portion 41A is pivotally supported at a predetermined height with respect to the lens holding member 23. As the length of the shaft portion 24A is made shorter than the bearing portion, the force with which the width direction extension portion 43 and the rotation restricting portion 44 are pressed against the upper and lower ends of the bearing portion 23A becomes stronger. Will increase. Therefore, it is more preferable to set the lengths of the shaft portion 24A and the bearing portion 23A so as to obtain an appropriate postcard.

  The width-direction extending portion 43 is connected to the side portion 41B so that the width of the spectacles is expanded with the temple 24 opened, and thus the side portion 41B is connected to the lens 5 and the nose with the temple 24 closed. This prevents the contact pad 22 from interfering with each other and prevents the widthwise extension 43 from coming into contact with the outer edge surface 5 c-1 of the lens 5.

  The rotation restricting portion 44 is bent and connected to the lower end of the shaft portion 24A so as to protrude forward when the temple 24 is opened. With such a configuration, the temple 24 is opened, the shaft portion 24A rotates, and the inside of the rotation restricting portion 44 comes into contact with the lens edge surface 5c-1, thereby restricting the upper limit of the opening range of the temple 24. .

Next, the operation of the hinge structure according to the present invention will be described with reference to FIG.
FIG. 5A is a plan view of a state in which the temple is completely opened, FIG. 5B is a front view thereof, and FIG. 5C shows a state in which the temple is being closed or opened. It is a top view.

  As shown in FIG. 5C, when the temple 24 is not completely opened, the inner surface of the rotation restricting portion 24 is separated from the outer edge surface 5c-1. When the temple 24 is further opened from this state, the rotation restricting portion 44 rotates around the shaft portion 24A. Then, the inner surface of the rotation restricting portion 44 approaches the lens edge surface 5c, and as shown in FIGS. 5A and 5B, the inner surface of the rotation restricting portion 44 is the outer edge surface 5c of the lens. -1 (below the concave portion 27 and the lens front surface 5c side from the concave portion). As a result, further rotation of the rotation restricting portion 44 is hindered by the lens edge surface, and the natural state of the temple 24 (the load on the temple 24 is loaded) until the rotation restricting portion 44 contacts the lens edge surface. It is regulated as the maximum angle that can be opened with Note that when the force is applied to open the temple 24 from the state in which the rotation restricting portion 44 is in contact with the lens edge surface, the temple 24 is usually formed of an elastic material, and thus the shaft portion. Due to the torsion of 24A and the bending of the width direction extension portion 43, the side portion 41B, the bridge, etc., the side portion 41B expands to a certain extent, and the elastic restoring force of the temple 24 gives a force to moderately hold the wearer's head. Can be generated.

Next, a procedure for attaching the spectacle frame to the lens 5 will be described.
The attachment of the bridge to the lens will not be described because a conventional rimless eyeglass holding structure can be used.
First, left and right eyeglass lenses are prepared, and the concave portions described above are formed at predetermined positions on both outer sides thereof. A known cutting tool (for example, a ball end mill, a drill, an electrodeposited diamond grindstone with a shaft, or the like) can be used for forming the recessed portion.

  Next, the lens holding member 23 and the temple 24 are prepared, and the shaft portion 24 </ b> A is disposed on the bearing portion of the lens holding member 23. Then, the lens holding portion 23B is closed and the holding pieces are arranged on the same plane, and the lens holding portion 23B is inserted into the concave portion 27 previously filled with a transparent resin for bonding. Note that at least the lens holding portion 23B of the lens holding member 23 is subjected to a treatment for improving wettability (for example, plasma cleaning treatment, surfactant coating, etc.) in advance, or before filling the recessed portion with a transparent resin. Alternatively, it is preferable to deaerate in a vacuum after filling because bubbles do not remain in the recessed portion. In addition, the lens holding member 23 is attached to the lens 5 in advance, and the rotation restricting portion 44 is inserted into the bearing portion 23A without being bent, and protrudes from the shaft portion 24A below the bearing portion, and then from the shaft portion 24A. The tip of the rotation may be formed by bending the tip.

  In the above embodiment, the case where the concave portion 27 is a flat hole narrow in the lens thickness direction (when the width of the lens holding portion 23B is longer than the plate thickness) has been described, but in this case, the edge of the lens Even when the surface 5C is narrow, the concave portion 27 can be formed, the width of each holding piece can be widened, and the concave portion 27 can be prevented from rotating. In addition, if the shape of the recessed part 27 (lens holding | maintenance part 23B) is a non-axis object shape, since rotation of the lens holding | maintenance part 23 can be prevented, it is not limited to the said shape. For example, when the concave portion 27 is a hole whose width in the lens thickness direction is equal to the width in the vertical direction (when the width of the lens holding portion 23B is equal to the plate thickness), or a flat hole wide in the lens thickness direction (lens holding) The plate thickness of the portion 23B may be longer than the width).

  In such a hinge structure of the glasses 20, there are only two members constituting the hinge, that is, the lens holding member 23 and the temple 24, so that the number of parts is small and an extremely simple hinge structure can be obtained. it can. Further, since the lens holding member 23 also serves as a lens holding member in addition to the hinge constituent member, and the temple 24 also serves as an armor and temple in addition to the hinge constituent member, it is extremely simple and has a beautiful function. Therefore, it is suitable for application to edgeless eyeglasses with a light weight. Further, the shape and structure of the lens holding member 23 are simple and can be easily manufactured. Further, since the temple 24 is folded on the back side of the front portion 25 of the lens 5 with the shaft portion 24A as a rotation fulcrum, in this folded state, the temple 24 does not protrude outside the lens 5, and the lateral width of the glasses 20 is normal. Shorter than eyeglasses, the storage space can be reduced.

It is a top view which shows one Embodiment of the spectacles which employ | adopted the hinge structure based on this invention. It is a perspective view of a hinge structure. It is a perspective view in the natural state of the 1st holding member. It is a disassembled perspective view of a hinge structure. (A)-(c) is a figure for demonstrating operation | movement of the hinge structure based on this invention. It is a general view of the conventional edgeless spectacles. It is the elements on larger scale of the lens holding structure of the conventional edgeless spectacles.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 5 ... Eyeglass lens, 5a, 5b ... Optical surface, 5c ... Edge surface, 20 ... Glasses, 21 ... Bridge, 23 ... Lens holding member, 23A ... Bearing part, 23B ... Lens holding part, 24 ... Temple, 27 ... Recessed part , 29a, 29b, 30 ... holding piece, 31a, 31b, 32 ... open part, 41A ... rotating part, 41B ... side part, 44 ... turning restricting part.

Claims (7)

In the hinge structure of the edgeless glasses for rotatably mounting the temple to the lens holding member attached to the edge surface of the eyeglass lens,
A concave portion that is a non-through hole is formed on the edge surface of the spectacle lens,
The front end of the temple is provided with a shaft that is pivotally supported by the lens holding member,
The lens holding member integrally includes a lens holding portion that is inserted and fixed in the recessed portion, and a bearing portion that pivotally supports the shaft portion of the temple,
The bearing portion of the lens holding member is formed in a cylindrical body having an outer peripheral side open portion in which both ends in the axial direction are open and an outer periphery is divided in the axial direction.
The lens holding part of the lens holding member consists of a thin plate-like holding piece extending in parallel with the axial direction of the bearing part from two open end edges forming the outer peripheral side open part of the bearing part,
The hinge structure of edgeless glasses characterized in that the holding pieces provided at the respective open end edges are formed so as not to overlap each other in the axial direction of the bearing portion. In the hinge structure of edgeless glasses according to claim 1,
The lens holding portion of the lens holding member is composed of a plurality of holding pieces provided with holding pieces provided on at least one open end edge spaced apart in the axial direction of the bearing portion,
A hinge structure for edgeless glasses, wherein the holding piece provided on the other open end edge is formed between the plurality of holding pieces provided on the one open end edge. In the hinge structure of edgeless glasses according to claim 1 or 2,
The hinge structure of edgeless glasses, wherein the lens holding member is formed of a transparent resin having elasticity. In the hinge structure of the glasses according to any one of claims 1 to 3,
The front end portion of the temple is provided with a rotation restricting portion that engages with an edge surface of the spectacle lens at one end portion of the shaft portion and restricts the rotation of the temple outward. Glasses hinge structure. In the hinge structure of the glasses according to claim 4,
The front end portion of the temple is provided with a width direction extension portion that extends at the other end portion of the shaft portion so as to widen the distance between both temples in a state where the temple is opened. Hinge structure. In the hinge structure of the glasses according to claim 4 or 5,
The hinge structure of the glasses, wherein the front end portion of the temple has a shape formed by bending a single wire.   An eyeglass comprising the hinge structure according to any one of claims 1 to 6.

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