Spectacles

Abstract

To provide flip-up spectacles that can prevent an attachment structure removably attaching a holding frame to a front bar from being easily viewed by a viewer in front of a wearer.SOLUTION: Flip-up spectacles have first lenses in a flipped-up state, and comprises a holding frame, a front bar, and hinges. The holding frame holds the first lenses. The front bar is arranged in front of the face of a wearer. The hinges rotatably support the holding frame relative to the front bar. The front bar has attachment holes penetrating the front bar in a vertical direction. The hinges each include a first bridge piece, a second bridge piece, and a rotation shaft. The first bridge piece is provided on the front bar, and the second bridge piece is provided on the holding frame. The rotation shaft connects the first bridge piece and the second bridge piece to each other, and allows the second bridge piece to rotate relative to the first bridge piece. The first bridge piece includes a leg piece having a shape along the vertical direction. The leg piece may be removably inserted into the attachment hole. The hinge is provided on the front bar with the leg piece inserted into the attachment hole.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to flip-up eyeglasses in which the lenses are in a flip-up state. [Background technology]

[0002] Patent Document 1 discloses flip-up eyeglasses with detachable lenses. The eyeglasses include a brow bar, a flip-up beam, and an inner frame. Left and right lenses are attached to the inner frame. The inner frame is attached to a flip-up member. The flip-up member is hinged to the brow bar at two points on the left and right. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-88539 A Summary of the Invention [Problem to be solved by the invention]

[0004] In flip-up eyeglasses, a retaining frame is flipped up relative to a front bar. The retaining frame holds a lens. The front bar is positioned in front of the wearer's face, crossing the wearer's face from left to right. There is a demand for flip-up eyeglasses that have a retaining frame that can be attached and detached from the front bar. The inventor has studied the design of flip-up eyeglasses in which the retaining frame is detachable from the front bar. In this study, the inventor has taken the following viewpoint into consideration. This viewpoint is to make it difficult for a viewer in front of a wearer wearing flip-up eyeglasses to see the next attachment structure. This attachment structure makes the retaining frame detachable from the front bar.

[0005] An object of the present invention is to provide flip-up type eyeglasses that can make it difficult for a person in front of the wearer to see an attachment structure for attaching and detaching a holding frame to a front bar. [Means for solving the problem]

[0006] One aspect of the present invention is a pair of flip-up glasses in which a first lens is flipped up, the pair of glasses comprising: a retaining frame that holds the first lens; a front bar that is positioned in front of a wearer's face in a state that crosses the face of the wearer wearing the glasses from left to right; and hinges that are respectively attached to the retaining frame and the front bar and support the retaining frame rotatably relative to the front bar, the front bar having an attachment hole that penetrates the front bar in a vertical direction that corresponds to the top and bottom of the wearer's face, the hinge including a first link piece that is attached to the front bar, a second link piece that is attached to the retaining frame, and a rotation shaft that connects the first link piece and the second link piece and rotates the second link piece relative to the first link piece, the first link piece including a leg piece that has a shape that follows the vertical direction, the leg piece being freely inserted and removed from the attachment hole, and the hinge being attached to the front bar with the leg piece inserted into the attachment hole.

[0007] According to these eyeglasses, the holding frame can be rotatably supported with respect to the front bar by inserting the leg pieces into the mounting holes. By inserting the leg pieces into the mounting holes, the leg pieces can be covered and hidden by the front bar.

[0008] The eyeglasses may have an engagement structure for hooking the leg piece into the inside of the mounting hole when the leg piece is inserted into the mounting hole, and the engagement structure may include a notch cut in the width direction corresponding to the width of the wearer's face, and a locking piece that fits into the notch. In this case, the notch may be provided in the leg piece, and the locking piece may be provided inside the mounting hole. Furthermore, the engagement structure may include a claw piece provided below the locking piece in the vertical direction when the locking piece is fitted into the notch, the claw piece may be provided in the leg piece, and the notch may be provided on the leg piece above the claw piece in the vertical direction.

[0009] With this configuration, it is possible to prevent the holder frame from coming off unintentionally by the wearer. Effect of the Invention

[0010] According to the present invention, flip-up type eyeglasses can be obtained that make it difficult for a person in front of the wearer to see the mounting structure for attaching and detaching the holding frame to the front bar. [Brief description of the drawings]

[0011] [Figure 1] 1 is a plan view showing an example of a schematic configuration of eyeglasses. A pair of double flip-up eyeglasses is shown. The attached state and the non-flip-up state are shown. The upper part shows the state in which the temples are open. The lower part shows the state in which the temples are closed. [Diagram 2] 2 is a front view of the eyeglasses of FIG 1, showing the attached state and the non-flip-up state. The temples are not shown. [Diagram 3] FIG. 2 is a front view of the second lens, the front bar, the rim, the nose pads, and the end piece of the eyeglasses in FIG. 1 in an unattached state. The temples are not shown. [Figure 4] FIG. 2 is a right side view of the second lens, the front bar, the rim, the end piece, and the temple of the eyeglasses in FIG. 1 in an unattached state. Nose pads are omitted. [Diagram 5] Fig. 2 is a right side view of the frame and hinge of the eyeglasses of Fig. 1, showing the frame in a non-flip-up state and the frame in a flip-up state. [Figure 6] Fig. 2 is a perspective view showing an example of an engagement structure, which corresponds to the glasses in Fig. 1, and shows a schematic configuration of the hinges and the mounting holes of the front bar of the glasses in Fig. 1. Fig. 2 corresponds to the non-attached state, and shows the state in which the legs of the hinges have been removed from the mounting holes of the front bar. [Figure 7] Fig. 2 is a perspective view showing an example of an engagement structure, which corresponds to the glasses in Fig. 1, and shows a schematic configuration of the hinges and mounting holes of the front bar of the glasses in Fig. 1. Fig. 2 shows a state in which the legs of the hinges are inserted into the mounting holes of the front bar, which corresponds to the mounted state. [Figure 8] 7 is a cross-sectional view showing an example of an engagement structure, the upper part being a cross-sectional view taken along line AA in FIG. 6, and the lower part being a cross-sectional view taken along line BB in FIG. [Figure 9] 1 is a cross-sectional view showing another example of the engagement structure, in which the upper part corresponds to a non-attached state and shows a state in which the legs of the hinges are removed from the mounting holes of the front bar, and the lower part corresponds to a mounted state and shows a state in which the legs of the hinges are inserted into the mounting holes of the front bar. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to the configurations described below, and various configurations can be adopted within the same technical idea. For example, some of the configurations shown below may be omitted or replaced with other configurations. The present invention may include other configurations. The drawings are explanatory diagrams for understanding the present invention and are different from design drawings. Each drawing may not correspond exactly to other drawings. The two-dot chain lines are imaginary lines. Hatching indicates a cut surface.

[0013] <Glasses 10> The glasses 10 will be described with reference to Figs. 1 to 8. In the embodiment, the directions that specify the glasses 10 are called the "width direction", the "front-rear direction", and the "up-down direction". One end side in the width direction is called the "left side", and the other end side in the width direction is called the "right side". One side in the front-rear direction is called the "front side", and the other side in the front-rear direction is called the "rear side". One side in the up-down direction is called the "upper side", and the other side in the up-down direction is called the "lower side". The width direction, the front-rear direction, and the up-down direction are based on a wearer who wears the glasses 10. That is, the width direction corresponds to the width of the face of the wearer who wears the glasses 10. The left side in the width direction is the left side of the wearer, and the right side in the width direction is the right side of the wearer. The left and right in the width direction are opposite to the left and right when Fig. 2, which is a front view of the glasses 10, is viewed from the front. The front-rear direction corresponds to the front and back of the wearer who wears the glasses 10. The front side in the front-rear direction is the front side of the wearer, and the rear side in the front-rear direction is the rear side of the wearer. The front side of the wearer is the front side of the wearer, and the rear side of the wearer is the back side of the wearer. For example, the front side of the wearer is the side of the wearer's face, and the rear side of the wearer is the side of the back of the wearer's head. The up-down direction corresponds to the up-down direction of the wearer wearing the eyeglasses 10. The up-down direction is the up-down direction of the wearer, and the down-down direction is the down-down direction of the wearer.

[0014] The glasses 10 are of a flip-up type. Examples of flip-up glasses include single flip-up glasses and double flip-up glasses. In the embodiment, the double flip-up glasses 10 are taken as an example. The glasses 10 include first lenses 11L, 11R, second lenses 12L, 12R, a holding frame 20, a front bar 30, rims 40L, 40R, nose pads 45L, 45R, hinges 50L, 50R, end pieces 60L, 60R, temples 61L, 61R, and hinges 63L, 63R (see FIGS. 1 to 7).

[0015] The first lens 11L and the second lens 12L correspond to the left eye of the wearer, and the first lens 11R and the second lens 12R correspond to the right eye of the wearer (see Figs. 1 and 2). Regardless of whether the glasses are in a non-flip-up state or a flip-up state, the lenses provided in front of the left and right eyes of the wearer wearing the glasses 10 are referred to as "second lenses 12L, 12R". In the non-flip-up state, the second lens 12L is provided behind the first lens 11L in the front-rear direction, and the second lens 12R is provided behind the first lens 11R in the front-rear direction.

[0016] The first lenses 11L, 11R are flipped up (see "flip-up state" in FIG. 3). In the embodiment, the state in which the first lenses 11L, 11R are not flipped up is called "non-flip-up state" (see "non-flip-up state" in FIG. 1, 2 and FIG. 3), and the state in which the first lenses 11L, 11R are flipped up is called "flip-up state" (see "flip-up state" in FIG. 3). It is assumed that the compound flip-up eyeglasses 10 are in a non-flip-up state. In this case, the lenses provided corresponding to the wearer's left eye are the first lens 11L and the second lens 12L, and the lenses provided corresponding to the wearer's right eye are the first lens 11R and the second lens 12R. It is assumed that the compound flip-up eyeglasses 10 are in a flip-up state. In this case, the lens provided corresponding to the wearer's left eye is the second lens 12L, and the lens provided corresponding to the wearer's right eye is the second lens 12R.

[0017] The glasses 10 may employ the same lenses as those of known compound flip-up glasses as the first lenses 11L, 11R and the second lenses 12L, 12R. Therefore, further explanations regarding the first lenses 11L, 11R and the second lenses 12L, 12R will be omitted. In the embodiment, when the first lenses 11L, 11R are not distinguished from each other or are collectively referred to, they are referred to as the "first lens 11." When the hinges 50L, 50R are not distinguished from each other or are collectively referred to, they are referred to as the "hinge 50."

[0018] The holding frame 20 holds the first lenses 11L, 11R (see Figs. 2, 3, and 5). In the eyeglasses 10, the holding frame 20 has a known full-rim frame structure. That is, the holding frame 20 includes holding portions 21L, 21R and a connecting portion 23 (see Figs. 1 and 2). The holding portion 21L has an annular shape and holds the first lens 11L. The holding portion 21R has an annular shape and holds the first lens 11R. The connecting portion 23 connects the holding portions 21L, 21R in the width direction. In the embodiment, when the holding portions 21L, 21R are not distinguished from each other or are collectively referred to, they are referred to as "holding portion 21."

[0019] Examples of materials forming the retaining frame 20 include metal and resin. In addition, one or both of the retaining portion 21 and the connecting portion 23 may be made of a composite material in the following manner. In this manner, a metal core is coated with a resin. Examples of metals include titanium and stainless steel. Examples of resins include polyetherimide, polyamide, nylon, celluloid, and acetate. However, the retaining frame 20 may be made of a material different from these. The material forming the retaining frame 20 is appropriately determined in consideration of various conditions.

[0020] The front bar 30 is placed in front of the wearer's face, crossing the wearer's face from left to right (see the upper part of FIG. 1 and FIG. 3). The front bar 30 has a symmetrical shape and is formed as a single piece. Examples of materials forming the front bar 30 include metal and resin. In addition, the front bar 30 may be made of a composite material in the following manner. In this manner, a metal core is covered with resin. Examples of metals include titanium and stainless steel. Examples of resins include polyetherimide, polyamide, nylon, celluloid, and acetate. However, the front bar 30 may be made of a material different from these. The material forming the front bar 30 is appropriately determined in consideration of various conditions.

[0021] The front bar 30 has a mounting hole 31 (see Figs. 1, 6 to 8). In the eyeglasses 10, the front bar 30 has two mounting holes 31. The two mounting holes 31 are provided on the left and right sides of the width of the front bar 30, sandwiching the center line M. In the embodiment, the mounting hole 31 provided on the left side in the width direction is referred to as the "mounting hole 31L", and the mounting hole 31 provided on the right side in the width direction is referred to as the "mounting hole 31R". When the mounting holes 31L and 31R are not distinguished from each other or are collectively referred to, they are referred to as the "mounting hole 31". The center line M coincides with the center of the width of the front bar 30 (see Figs. 1 and 3). The center line M can also be said to be the center of the width of the eyeglasses 10 (see Fig. 1). The mounting holes 31L and 31R have a symmetrical shape with the center line M as the axis of symmetry, and are arranged symmetrically on the front bar 30 with the center line M as the axis of symmetry.

[0022] The mounting hole 31 penetrates the front bar 30 in the up-down direction (see FIG. 8). The mounting hole 31 is provided with a locking piece 32 inside. The locking piece 32 has an outer peripheral shape corresponding to the notch 55 (see the lower part of FIG. 8). The notch 55 will be described later. In the embodiment, the locking piece 32 provided inside the mounting hole 31L is referred to as the "locking piece 32L", and the locking piece 32 provided inside the mounting hole 31R is referred to as the "locking piece 32R". When the locking pieces 32L and 32R are not distinguished from each other or are collectively referred to, they are referred to as the "locking piece 32". The locking piece 32 is connected to the front surface of the mounting hole 31 in the front-rear direction at its front end in the front-rear direction and to the rear surface of the mounting hole 31 in the front-rear direction at its rear end in the front-rear direction.

[0023] In the glasses 10, the vertical dimension of the locking piece 32 is set to dimension L1, the vertical dimensions of the front and rear surfaces of the mounting hole 31 in the front-rear direction are set to dimension L2, and the vertical dimensions L2 of the front and rear surfaces of the mounting hole 31 in the front-rear direction are set to the same value. The dimension L1 may be set smaller than the dimension L2 (see the upper part of Fig. 8, L1 < L2). A space S surrounded by three surfaces, i.e., the front surface of the mounting hole 31 in the front-rear direction, the lower surface of the locking piece 32 in the vertical direction, and the rear surface of the mounting hole 31 in the front-rear direction, may be formed below the locking piece 32 in the vertical direction. In the glasses 10, the lower surface of the locking piece 32 in the vertical direction is formed above the lower surface of the front bar 30 in the vertical direction, and the inside of the mounting hole 31 includes the space S. In addition, the locking piece 32 will be described later.

[0024] The front bar 30 includes a central portion 35, end portions 36L and 36R, and connecting portions 37L and 37R (see Figs. 1 and 3). In the embodiment, when the end portions 36L and 36R are not distinguished or when they are collectively referred to, they are called "end portion 36". When the connecting portions 37L and 37R are not distinguished or when they are collectively referred to, they are called "connecting portion 37". The central portion 35 includes the center in the width direction of the front bar 30 and forms the central region in the width direction of the front bar 30. In the non-bouncing-up state, the holding frame 20 is aligned with the front bar 30 in the front-rear direction (see Fig. 1). The center in the width direction of the holding frame 20 coincides with the center in the width direction of the front bar 30.

[0025] The end portion 36 is provided on the end side in the width direction from the central portion 35 (see Figs. 1 and 3). The end portion 36 has a shape inclined rearward in the front-rear direction from the center side in the width direction toward the end side (see Fig. 1). That is, the end portion 36L is provided on the left side in the width direction from the central portion 35, and the end portion 36R is provided on the right side in the width direction from the central portion 35. The end portion 36L has a shape inclined rearward in the front-rear direction from the center side in the width direction toward the left side, and the end portion 36R has a shape inclined rearward in the front-rear direction from the center side in the width direction toward the right side. In the glasses 10, the mounting hole 31 is provided in the end portion 36. That is, in the front bar 30, the mounting hole 31L is provided closer to the right side in the width direction of the end portion 36L, and the mounting hole 31R is provided closer to the left side in the width direction of the end portion 36R.

[0026] The connecting portion 37 connects the central portion 35 and the end portion 36 (see Figs. 1 and 3). That is, the connecting portion 37 is provided between the central portion 35 and the end portion 36, and connects the central portion 35 and the end portion 36 in the width direction. The connecting portion 37 has a shape that is inclined from the front side to the rear side in the front-to-rear direction from the center side in the width direction of the front bar 30 to the end side. That is, the connecting portion 37L has a shape that is inclined from the front side to the rear side in the front-to-rear direction from the center side in the width direction to the left side. The connecting portion 37R has a shape that is inclined from the front side to the rear side in the front-to-rear direction from the center side in the width direction to the right side.

[0027] The rims 40L and 40R are provided on the front bar 30, the rim 40L holds the second lens 12L, and the rim 40R holds the second lens 12R (see FIG. 3). The rims 40L and 40R have a symmetrical shape with the center line M as an axis of symmetry, and are provided on the front bar 30 spaced apart in the width direction with the center line M as the center. The rim 40L is provided on the front bar 30 on the left side of the center line M in the width direction. The rim 40R is provided on the front bar 30 on the right side of the center line M in the width direction. In the glasses 10, the rim 40L is fixed to the left region of the center portion 35 in the width direction, and the rim 40R is fixed to the right region of the center portion 35 in the width direction. The left region of the center portion 35 in the width direction is the left side of the center line M in the width direction, and the right region of the center portion 35 in the width direction is the right side of the center line M in the width direction. The rims 40L, 40R are disposed at positions symmetrical to the left and right with respect to the center line M. A method for fixing the rims 40L, 40R to the front bar 30 is appropriately determined in consideration of various conditions. Examples of the fixing method include brazing and welding.

[0028] The nose pad 45L is fixed at a predetermined position on the right side of the rim 40L in the width direction, and the nose pad 45R is fixed at a predetermined position on the left side of the rim 40R in the width direction. Furthermore, the nose pads 45L and 45R are arranged at positions symmetrical with respect to the center line M as the axis of symmetry. The nose pads 45L and 45R contact the wearer's nose. That is, the nose pad 45L contacts the left side of the wearer's nose when the spectacles 10 are worn by the wearer. The nose pad 45R contacts the right side of the wearer's nose when the spectacles 10 are worn by the wearer. The nose pads 45L and 45R contact the predetermined positions of the wearer's nose regardless of whether the first lens 11 is flipped up. Accordingly, the nose pads 45L and 45R support the spectacles 10 on the wearer's head together with the temples 61L and 61R.

[0029] The hinge 50 is provided on the holding frame 20 and the front bar 30 (see Figs. 1, 5-8). The hinge 50 is fixed to the rear side of the holding frame 20 in the front-rear direction in the non-flip-up state (see Figs. 1, 5). The hinge 50 is detachably provided in the mounting hole 31 of the front bar 30 (see Figs. 1, 6-8). The hinge 50 is provided on the holding frame 20 and the end portion 36 in a state adjacent to the connecting portion 37 in the width direction. The hinge 50L is provided on the holding portion 21L and the end portion 36L in the following first state. In the first state, the hinge 50L is adjacent to the connecting portion 37L in the width direction on the left side of the connecting portion 37L. The hinge 50R is provided on the holding portion 21R and the end portion 36R in the following second state. In the second state, the hinge 50R is adjacent to the connecting portion 37R in the width direction on the right side of the connecting portion 37R in the width direction.

[0030] The hinge 50L includes a first link piece 51L, a second link piece 57L, and a rotation shaft 58L, and the hinge 50R includes a first link piece 51R, a second link piece 57R, and a rotation shaft 58R (see FIG. 6). The hinges 50L and 50R are symmetrical about the center line M. That is, the first link pieces 51L and 51R are symmetrical about the center line M, the second link pieces 57L and 57R are symmetrical about the center line M, and the rotation shafts 58L and 58R are symmetrical about the center line M. In the embodiment, when the first link pieces 51L and 51R are not distinguished from each other or are collectively referred to, they are referred to as "first link piece 51". When the second link pieces 57L and 57R are not distinguished from each other or are collectively referred to, they are referred to as "second link piece 57". When the rotation shafts 58L and 58R are not distinguished from each other or are collectively referred to, they are referred to as "rotation shaft 58".

[0031] In the hinge 50, a first piece 51 is provided on the front bar 30 (see Figs. 1 and 7). The first piece 51 has an integral shape including a first portion 52 and a second portion 53 (see Fig. 6). The second portion 53 protrudes from the end of the first portion 52, which is the rear side in the front-rear direction in the non-flip-up state, to the end side in the width direction. In the embodiment, the first portion 52 and the second portion 53 of the first piece 51L are referred to as the "first portion 52L" and the "second portion 53L", and the first portion 52 and the second portion 53 of the first piece 51R are referred to as the "first portion 52R" and the "second portion 53R". When the first portions 52L and 52R are not distinguished from each other or are collectively referred to, they are referred to as the "first portion 52". When the second portions 53L and 53R are not distinguished from each other or are collectively referred to, they are referred to as the "second portion 53". That is, the first piece 51L has an integral shape including a first portion 52L and a second portion 53L, and the second portion 53L protrudes to the left in the width direction from the end portion of the first portion 52L which is the rear side in the front-to-rear direction in the non-flip-up state. The first piece 51R has an integral shape including a first portion 52R and a second portion 53R, and the second portion 53R protrudes to the right in the width direction from the end portion of the first portion 52R which is the rear side in the front-to-rear direction in the non-flip-up state.

[0032] The first link piece 51 includes a leg piece 54 (see FIG. 6). The leg piece 54 has a shape that follows the up-down direction (see FIG. 6 and the upper part of FIG. 8). The leg piece 54 can be inserted and removed freely from the mounting hole 31 (see FIGS. 6 to 8). In the eyeglasses 10, the leg piece 54 is provided in the second portion 53. In the second portion 53, the leg piece 54 forms the lower side in the up-down direction. The leg piece 54 is inserted into the mounting hole 31. The leg piece 54 is provided with a notch 55 and a claw piece 56. The notch 55 is cut out in the width direction. The notch 55 is provided on the end side of the leg piece 54 in the width direction. The notch 55 is provided on the upper side of the claw piece 56 in the up-down direction. In the embodiment, the leg piece 54, the notch 55 and the claw piece 56 of the first link piece 51L are referred to as the "leg piece 54L", the "notch 55L" and the "claw piece 56L", and the leg piece 54, the notch 55 and the claw piece 56 of the first link piece 51R are referred to as the "leg piece 54R", the "notch 55R" and the "claw piece 56R". When the leg pieces 54L and 54R are not distinguished from each other or are referred to collectively, they are referred to as the "leg piece 54". When the notches 55L and 55R are not distinguished from each other or are referred to collectively, they are referred to as the "notch 55". When the claw pieces 56L and 56R are not distinguished from each other or are referred to collectively, they are referred to as the "claw piece 56". That is, in the first link piece 51L, the notch 55L is provided on the left side of the leg piece 54L in the width direction, and the notch 55L is provided on the upper side of the claw piece 56L in the vertical direction. The notch 55L passes through the leg piece 54L in the front-rear direction, and the claw piece 56L has a convex shape on the left side in the width direction. In the first link piece 51R, the notch 55R is provided on the right side in the width direction of the leg piece 54R, and the notch 55R is provided on the upper side in the up-down direction of the claw piece 56R. The notch 55R passes through the leg piece 54R in the front-rear direction, and the claw piece 56R has a convex shape on the right side in the width direction. However, such a shape of the claw piece 56 is an example. The shape of the claw piece 56 is determined appropriately taking into account various conditions.

[0033] In the hinge 50, the second piece 57 is provided on the holding frame 20 (see Figs. 1 and 5). That is, in the hinge 50L, the second piece 57L is fixed to the rear side of the holding portion 21L in the front-rear direction in a non-flip-up state. Furthermore, in the hinge 50L, the second piece 57L is fixed to the upper side of the holding portion 21L in the vertical direction and to the central portion 35 of the holding portion 21L in the width direction. In the hinge 50R, the second piece 57R is fixed to the rear side of the holding portion 21R in the front-rear direction in a non-flip-up state. Furthermore, in the hinge 50R, the second piece 57R is fixed to the upper side of the holding portion 21R in the vertical direction and to the central portion 35 of the holding portion 21R in the width direction. However, such an arrangement of the hinge 50 relative to the holding frame 20 is an example. The arrangement of the hinge 50L relative to the holding frame 20 may be different from the above-mentioned embodiment, and the arrangement of the hinge 50R relative to the holding frame 20 may be different from the above-mentioned embodiment. The arrangement of the hinges 50L, 50R relative to the holding frame 20 is appropriately determined taking into consideration various conditions.

[0034] Examples of the method for fixing the holding part 21 and the second piece 57 include brazing and integral resin molding. It is assumed that the part of the holding part 21 to which the second piece 57 is fixed is made of metal. In this case, brazing may be used as the above-mentioned fixing method. It is assumed that the part of the holding part 21 to which the second piece 57 is fixed is made of resin. In this case, resin integral molding may be used as the above-mentioned fixing method.

[0035] An example of the rotation shaft 58 is a screw (male screw). The eyeglasses 10 employ a screw (male screw) as the rotation shaft 58 (see Figs. 5 to 7). The rotation shaft 58 connects the first link piece 51 and the second link piece 57, and rotates the second link piece 57 relative to the first link piece 51 (see Figs. 5 and 7). That is, in the eyeglasses 10, the hinges 50L and 50R support the holding frame 20 rotatably relative to the front bar 30 (see Figs. 1, 5 and 7). The front bar 30 is not shown in Fig. 5. The holding frame 20 is not shown in Figs. 6 and 7.

[0036] The eyeglasses 10 have an engagement structure (see Figs. 6 to 8). The engagement structure hooks the leg 54 into the inside of the mounting hole 31 when the leg 54 is inserted into the mounting hole 31 (see the lower part of Fig. 8). In the engagement structure, the leg 54L is inserted into the mounting hole 31L, so that the locking piece 32L fits into the notch 55L, and the leg 54R is inserted into the mounting hole 31R, so that the locking piece 32R fits into the notch 55R (see the lower part of Fig. 8). At that time, the claw 56L fits into the space S below the locking piece 32L in the height direction, and the claw 56R fits into the space S below the locking piece 32R in the height direction. In other words, the claw 56L is provided below the locking piece 32L in the up-down direction when the locking piece 32L fits into the notch 55L. The claw piece 56R is provided on the lower side of the locking piece 32R in the up-down direction in a state where the locking piece 32R is fitted into the notch 55R.

[0037] In the eyeglasses 10, the following aspects can be specified as the engagement structure. That is, the engagement structure includes a notch 55, a locking piece 32, and a claw piece 56. The eyeglasses 10 include engagement structures on the left and right sides in the width direction. The engagement structure on the left side in the width direction includes a notch 55L, a locking piece 32L, and a claw piece 56L, and the engagement structure on the right side in the width direction includes a notch 55R, a locking piece 32R, and a claw piece 56R. In the eyeglasses 10, the hinge 50 is attached to the front bar 30 with the leg piece 54 inserted into the mounting hole 31 (see Figures 1, 7, and the lower part of Figure 8).

[0038] In the eyeglasses 10, the first interval G1 and the second interval G2 may be set to "first interval G1 ≧ second interval G2" or may be set to "first interval G1 > second interval G2". The first interval G1 is the minimum dimension in the width direction of the notches 55L and 55R, and the second interval G2 is the minimum dimension in the width direction of the locking pieces 32L and 32R (see the upper part of FIG. 8). In the notches 55L and 55R, the widthwise interval is shortest between the surface along the vertical direction of the notch 55L and the surface along the vertical direction of the notch 55R. In the locking pieces 32L and 32R, the widthwise interval is shortest between the surface on the right side in the width direction along the vertical direction of the locking piece 32L and the surface on the left side in the width direction along the vertical direction of the locking piece 32R. Therefore, the first gap G1 corresponds to the widthwise distance between the vertical surface of notch 55L and the vertical surface of notch 55R, and the second gap G2 corresponds to the widthwise distance between the vertical right surface of locking piece 32L and the horizontal left surface of locking piece 32R.

[0039] By setting the first interval G1 and the second interval G2 to "first interval G1 ≧ second interval G2", it is possible to suppress rattling of the holding frame 20 in the width direction in the attached state. In the attached state, the holding frame 20 is attached to the front bar 30 so as to be freely rotatable (see Figs. 1, 2, 7 and the lower part of Fig. 8). In the embodiment, the state in which the holding frame 20 is detached from the front bar 30 is referred to as the "non-attached state" (see Figs. 3, 4, 6 and the upper part of Fig. 8). By setting "first interval G1>second interval G2", in the attached state, an elastic force can be applied between the locking piece 32L and the leg piece 54L, and an elastic force can be applied between the locking piece 32R and the leg piece 54R. Accordingly, in the attached state, the locking piece 32L and the leg piece 54L can be brought into close contact with each other in the width direction, and the locking piece 32R and the leg piece 54R can be brought into close contact with each other in the width direction. It is possible to increase the fixing force of the holding frame 20 to the front bar 30.

[0040] The end fitting 60L is provided contiguous to the left end of the front bar 30 (end portion 36L) in the width direction (see Figs. 1, 3, and 4). The end fitting 60R is provided contiguous to the right end of the front bar 30 (end portion 36R) in the width direction (see Figs. 1 and 3). The temple 61L is connected to the end fitting 60L via a hinge 63L, and the temple 61R is connected to the end fitting 60R via a hinge 63R (see Fig. 1). The temple 61L is rotatable within a predetermined range relative to the end fitting 60L (front bar 30) by the hinge 63L, and the temple 61R is rotatable within a predetermined range relative to the end fitting 60R (front bar 30) by the hinge 63R (see Fig. 1). When wearing the spectacles 10, the wearer can open the temples 61L and 61R (see the upper part of Fig. 1). When the wearer is not wearing the eyeglasses 10, the temples 61L, 61R can be folded and closed (see the lower part of FIG. 1).

[0041] The end pieces 60L, 60R have a symmetrical shape. The temples 61L, 61R have a symmetrical shape. The hinges 63L, 63R have a symmetrical shape. The end pieces 60L, 60R are similar to end pieces provided in known flip-up type glasses. The temples 61L, 61R are similar to temples provided in known flip-up type glasses. Even in known flip-up type glasses, hinges are provided to allow the temples to rotate freely relative to the end pieces. That is, in the glasses 10, the end pieces 60L, 60R, the temples 61L, 61R, and the hinges 63L, 63R may have the same structure as the end pieces, temples, and hinges employed in known flip-up type glasses. Therefore, further explanations regarding the end pieces 60L, 60R, the temples 61L, 61R, and the hinges 63L, 63R will be omitted.

[0042] <Effects of the embodiment> According to the embodiment, the following effects can be obtained.

[0043] (1) The glasses 10 are of a flip-up type and can be changed from a non-flip-up state to a flip-up state and vice versa (see FIG. 5). The glasses 10 include a holding frame 20, a front bar 30, and a hinge 50 (see FIGS. 1 to 7). The holding frame 20 holds the first lens 11 (see FIGS. 2, 3, and 5). The front bar 30 is disposed in front of the wearer's face so as to cross the wearer's face from left to right (see the upper part of FIG. 1 and FIG. 3). The hinge 50 is provided on the holding frame 20 and the front bar 30 (see FIGS. 1, 5 to 8). The hinge 50 supports the holding frame 20 rotatably relative to the front bar 30 (see FIGS. 1, 5, and 7). The front bar 30 has an attachment hole 31 (see FIGS. 1, 6 to 8). The attachment hole 31 penetrates the front bar 30 in the up-down direction (see FIG. 8). The hinge 50 includes a first piece 51, a second piece 57, and a rotating shaft 58 (see FIG. 6). The first piece 51 is provided on the front bar 30 (see FIGS. 1 and 7). The second piece 57 is provided on the holding frame 20 (see FIGS. 1 and 5). The rotating shaft 58 connects the first piece 51 and the second piece 57, and rotates the second piece 57 relative to the first piece 51 (see FIGS. 5 and 7). The first piece 51 includes a leg piece 54 (see FIG. 6). The leg piece 54 has a shape along the vertical direction (see FIGS. 6 and the upper part of FIG. 8). The leg piece 54 can be inserted and removed freely from the mounting hole 31 (see FIGS. 6 to 8). The hinge 50 is provided on the front bar 30 with the leg piece 54 inserted into the mounting hole 31 (see FIGS. 1, 7, and the lower part of FIG. 8).

[0044] According to the eyeglasses 10, the leg pieces 54 can be inserted into the mounting holes 31 to support the holding frame 20 rotatably relative to the front bar 30. The leg pieces 54 can be inserted into the mounting holes 31 to cover and hide the front bar 30. The eyeglasses 10 can make the mounting structure for attaching and detaching the holding frame 20 to the front bar 30 difficult to see from a viewer in front of the wearer. In the eyeglasses 10, the mounting structure includes the engagement structure described above (see Figs. 6 to 8). For example, even if the wearer flips up the holding frame 20 while wearing the eyeglasses 10, it is also possible to make the mounting structure of the holding frame 20 to the front bar 30 difficult to see from a viewer in front of the wearer. The eyeglasses 10 can also give the viewer an impression that they have a neat mounting structure.

[0045] In the flip-up type eyeglasses 10, the widthwise spacing of the temples 61L, 61R may widen when the wearer puts on the eyeglasses 10. When the widthwise spacing of the temples 61L, 61R widens, a force acting on the temples 61L, 61R acts on the front bar 30. As a result, the front bar 30 may deform forward in the front-rear direction. In the front bar 30, the amount of deformation toward the front-rear direction increases toward the end side in the width direction. In the non-flip-up state, as the deformation amount of the front bar 30 increases, the distance between the holding frame 20 and the front bar 30 in the front-rear direction becomes narrower. According to the eyeglasses 10, the distance between the holding frame 20 and the front bar 30 in the front-rear direction can be widened at the end portion 36. The space in which the front bar 30 can move forward in the front-rear direction at the end side in the width direction becomes wider, and the amount of deformation of the end portion 36 of the front bar 30 can be increased. Contact with the holding frame 20 due to the deformation of the front bar 30 can be suppressed.

[0046] (2) The eyeglasses 10 have an engagement structure (see Figs. 6 to 8). The engagement structure hooks the leg piece 54 into the inside of the mounting hole 31 when the leg piece 54 is inserted into the mounting hole 31 (see the lower part of Fig. 8). The engagement structure includes a notch 55, a locking piece 32, and a claw piece 56. The notch 55 is cut out in the width direction. The locking piece 32 fits into the notch 55. The claw piece 56 is provided below the locking piece 32 in the up-down direction when the locking piece 32 fits into the notch 55. In the eyeglasses 10, the notch 55 and the claw piece 56 are provided in the leg piece 54, and the locking piece 32 is provided inside the mounting hole 31. The notch 55 is provided in the leg piece 54, above the claw piece 56 in the up-down direction. This configuration can prevent the retaining frame 20 from coming off unintentionally by the wearer.

[0047] The leg piece 54 may be shaped so that the vertical position of the lower end in the vertical direction is the same as the vertical position of the lower end of the front bar 30 in the vertical direction when attached (see the lower part of FIG. 8). Alternatively, the leg piece 54 may be shaped so that the vertical position of the lower end in the vertical direction is higher than the lower end of the front bar 30 in the vertical direction when attached. By giving the leg piece 54 any of the above-mentioned shapes, it is possible to prevent the leg piece 54 from protruding downward in the vertical direction of the front bar 30 from the mounting hole 31 in the attached state. In the attached state, the leg piece 54 can be hidden from a viewer in front of the wearer. It is assumed that the leg piece protrudes downward in the vertical direction of the front bar 30 from the mounting hole 31 in the attached state. In this case, it is assumed that the part of the leg piece protruding downward in the vertical direction of the front bar 30 may be within the field of vision of the wearer. By giving the leg piece 54 a shape that does not protrude downward in the vertical direction of the front bar 30 from the mounting hole 31 in the attached state, it is possible to prevent such an event from occurring.

[0048] <Modification> The embodiment can also be as follows. Some of the configurations of the modified examples shown below can be appropriately combined and adopted. Below, we will explain the points that are different from the above, and will appropriately omit explanations of similar points.

[0049] (1) A double flip-up eyeglasses 10 is taken as an example (see Figs. 1-4). The following first, second, third and fourth structures can also be adopted for single flip-up eyeglasses. In the first structure, the front bar 30 has an attachment hole 31 (see Figs. 1, 6-8). The attachment hole 31 penetrates the front bar 30 in the vertical direction (see Fig. 8). In the second structure, the hinge 50 includes a first link piece 51, a second link piece 57 and a rotating shaft 58 (see Fig. 6). The first link piece 51 is provided on the front bar 30 (see Figs. 1, 7). The second link piece 57 is provided on the holding frame 20 (see Figs. 1, 5). The rotating shaft 58 connects the first link piece 51 and the second link piece 57 and rotates the second link piece 57 relative to the first link piece 51 (see Figs. 5, 7). In the third structure, the first link piece 51 includes a leg piece 54 (see Fig. 6). The leg pieces 54 have a shape that follows the up-down direction (see Fig. 6 and the upper part of Fig. 8). The leg pieces 54 can be inserted and removed freely into the mounting holes 31 (see Figs. 6 to 8). In the fourth structure, the hinge 50 is provided on the front bar 30 with the leg pieces 54 inserted into the mounting holes 31 (see Figs. 1, 7 and the lower part of Fig. 8).

[0050] In single flip-up eyeglasses, the number of lenses provided corresponding to the left and right eyes of the wearer is one for each eye. In single flip-up eyeglasses, the second lenses 12L, 12R and the rims 40L, 40R are omitted. The nose pads 45L, 45R are provided on the front bar 30. The nose pad 45L may be provided on the left side of the center line M in the central region of the central portion 35 in the width direction. The nose pad 45R may be provided on the right side of the center line M in the width direction in the central region of the central portion 35. The single flip-up eyeglasses are known flip-up eyeglasses, and therefore further description thereof will be omitted.

[0051] (2) The end portion 36 has a shape that is inclined rearward in the front-to-rear direction from the center side in the width direction toward the end side (see FIG. 1). The end portion of the front bar may have a shape that is curved rearward in the front-to-rear direction from the center side in the width direction toward the end side. In this case, the left end portion of the front bar in the width direction has a shape that is curved rearward in the front-to-rear direction from the center side in the width direction toward the left side, and the right end portion of the front bar in the width direction has a shape that is curved rearward in the front-to-rear direction from the center side in the width direction toward the right side.

[0052] (3) The retaining frame 20 has a known full-rim type frame structure (see Figs. 2 and 5). The retaining frame may have a frame structure different from the full-rim type. An example of a frame structure different from the full-rim type is a half-rim type. The half-rim type retaining frame includes two nylors. The two nylors are provided for each of the first lenses 11L and 11R, and hold the first lenses 11L and 11R together with the two holding parts of the half-rim type retaining frame. The nylors are provided below the first lens 11 in the vertical direction, and hold the first lens 11 from below in the vertical direction. The two holding parts of the half-rim type retaining frame correspond to the holding parts 21L and 21R of the full-rim type retaining frame 20. The half-rim type frame structure is known, so further description thereof will be omitted.

[0053] (4) The eyeglasses 10 have an engagement structure (see Figs. 6 to 8). The engagement structure includes a notch 55, a locking piece 32, and a claw piece 56. In the engagement structure, a notch 55L is provided on the left side of the leg piece 54L in the width direction, and the claw piece 56L has a convex shape on the left side in the width direction, and a notch 55R is provided on the right side of the leg piece 54R in the width direction, and the claw piece 56R has a convex shape on the right side in the width direction. The engagement structure may be in a form different from that of the eyeglasses 10 described above. For example, the engagement structure may be in a form shown in Fig. 9. In the engagement structure in Fig. 9, in order to clarify the correspondence with the embodiment based on Figs. 1 to 8, the same reference numerals are used for the same or corresponding parts as above. In the engagement structure of Figure 9, a notch 55L is provided on the right side of the leg piece 54L in the width direction, and the claw piece 56L has a convex shape on the right side in the width direction, and a notch 55R is provided on the left side of the leg piece 54R in the width direction, and the claw piece 56R has a convex shape on the left side in the width direction.

[0054] In the engagement structure of FIG. 9, the first interval G1 and the second interval G2 may be set to "first interval G1≦second interval G2" or may be set to "first interval G1<second interval G2". In the engagement structure of FIG. 9, the first interval G1 is the maximum dimension in the width direction of the notches 55L and 55R, and the second interval G2 is the maximum dimension in the width direction of the locking pieces 32L and 32R. In the notches 55L and 55R of the engagement structure of FIG. 9, the widthwise interval is longest between the surface along the vertical direction of the notch 55L and the surface along the vertical direction of the notch 55R. In the engagement structure of FIG. 9, the widthwise interval is longest between the left surface in the width direction along the vertical direction of the locking piece 32L and the right surface in the width direction along the vertical direction of the locking piece 32R. Therefore, in the engagement structure of Figure 9, the first gap G1 corresponds to the widthwise distance between the vertical surface of notch 55L and the vertical surface of notch 55R, and the second gap G2 corresponds to the widthwise distance between the left widthwise surface of locking piece 32L and the right widthwise surface of locking piece 32R.

[0055] By setting the first interval G1 and the second interval G2 so that "first interval G1≦second interval G2", it is possible to suppress rattling of the holding frame 20 in the width direction in the attached state. By setting "first interval G1<second interval G2", it is possible to apply an elastic force between the locking piece 32L and the leg piece 54L in the attached state, and an elastic force between the locking piece 32R and the leg piece 54R. Accordingly, it is possible to bring the locking piece 32L and the leg piece 54L into close contact in the width direction in the attached state, and it is possible to bring the locking piece 32R and the leg piece 54R into close contact in the width direction. It is possible to increase the fixing force of the holding frame 20 to the front bar 30.

[0056] In the hinge 50L having the engagement structure shown in Fig. 9, the second portion 53L may protrude to the right in the width direction from the end portion of the first portion 52L which is the rear side in the front-to-rear direction in the non-flip-up state, similar to the first portion 52R and the second portion 53R of the first link piece 51R of the eyeglasses 10 shown in Figs. 1 to 8. In the hinge 50R having the engagement structure shown in Fig. 9, the second portion 53R may protrude to the left in the width direction from the end portion of the first portion 52R which is the rear side in the front-to-rear direction in the non-flip-up state, similar to the first portion 52L and the second portion 53L of the first link piece 51L of the eyeglasses 10 shown in Figs. 1 to 8.

[0057] (5) In the engagement structure of the eyeglasses 10, the notch 55 is formed by the following three surfaces, and the locking piece 32 has an outer peripheral shape corresponding to the notch 55 (see Figs. 6 and 8). Of the three surfaces forming the notch 55, two surfaces are provided facing each other in the vertical direction, and the remaining surface forms an angle with each of the two surfaces and connects the two surfaces in the vertical direction. However, this shape of the notch 55 is an example. The shape of the notch 55 is determined appropriately taking into account various conditions.

[0058] For example, the notch may be formed by the following two surfaces. One surface corresponds to the lower surface of the notch 55 in the vertical direction. The lower surface of the notch 55 in the vertical direction is formed by the upper surface of the claw piece 56 in the vertical direction. The remaining surface is provided along the vertical direction and connects the upper surface of the second part of the first link piece and the above-mentioned lower surface of the notch in the vertical direction. The remaining surface forms an outward angle with the upper surface of the second part of the first link piece in the vertical direction at the upper side in the vertical direction. The two surfaces forming this notch form an inward angle at the lower side in the vertical direction, similar to the surface along the vertical direction of the notch 55 and the lower surface of the notch 55 in the vertical direction. The locking piece may have an outer peripheral shape corresponding to this notch, similar to the locking piece 32 for the notch 55.

[0059] In the engagement structure, the claw pieces may be omitted. As in the lower part of FIG. 8, the legs are provided on the widthwise center side of the locking pieces in the attached state. In this case, it is preferable to set the first and second intervals to "first interval > second interval". An elastic force can be applied between the locking pieces and the legs on the left and right sides in the width direction. The locking pieces and the legs can be brought into close contact with each other in the width direction. The fixing force of the holding frame to the front bar can be increased. As in the lower part of FIG. 9, the legs are provided on the widthwise end side of the locking pieces in the attached state. In this case, it is preferable to set the first and second intervals to "first interval < second interval". An elastic force can be applied between the locking pieces and the legs on the left and right sides in the width direction. The locking pieces and the legs can be brought into close contact with each other in the width direction. The fixing force of the holding frame to the front bar can be increased. The first interval corresponds to the first interval G1 described above, and the second interval corresponds to the second interval G2 described above (see the upper parts of FIG. 8 and FIG. 9).

[0060] (6) The engagement structure hooks the leg piece 54 into the inside of the mounting hole 31 when the leg piece 54 is inserted into the mounting hole 31 (see the lower part of FIG. 8 and the lower part of FIG. 9). In the eyeglasses 10, the engagement structure includes a notch 55, a locking piece 32, and a claw piece 56. The eyeglasses may omit the following type of engagement structure. This type of engagement structure includes a notch and a locking piece. In the eyeglasses of this description, the mounting hole is provided in the front bar, and the leg piece is provided in the first link piece of the hinge. In the eyeglasses of this description, the notch and the locking piece are not provided. The hinge supports the holding frame rotatably relative to the front bar. In the eyeglasses of this description, it is preferable that the following first and second events occur simultaneously. In the first event, an elastic force acts between the mounting hole on the left side in the width direction and the leg piece on the left side in the width direction in the following state, and in the second event, an elastic force acts between the mounting hole on the right side in the width direction and the leg piece on the right side in the width direction in the following state. In this state, the leg piece on the left side in the width direction is inserted into the mounting hole on the left side in the width direction, and the leg piece on the right side in the width direction is inserted into the mounting hole on the right side in the width direction. The claw pieces may be omitted from the leg pieces or may be provided on the leg pieces. In the case where the claw pieces are provided on the leg pieces, the leg pieces may be sized to protrude from the mounting hole below the front bar in the vertical direction when attached. The claw pieces may be hooked onto the outer edge of the mounting hole on the vertical lower side of the front bar.

[0061] (7) In the engagement structure, the locking piece 32 is provided in the mounting hole 31, and the notch 55 is provided in the leg piece 54 (see Figures 6, 8 (top) and 9 (top)). The engagement structure may be in the following form. In this form, the locking piece is provided in the leg piece, and the notch is provided inside the mounting hole. In this form as well, the locking piece fits into the notch. The locking piece is provided at a predetermined position on the leg piece where this is achieved, and the notch is provided at a predetermined position inside the mounting hole where this is achieved. [Explanation of symbols]

[0062] 10 Glasses, 11,11L,11R First Lens, 12L,12R Second Lens 20 holding frame, 21, 21L, 21R holding portion, 23 connecting portion 30 Front bar, 31, 31L, 31R mounting holes 32,32L,32R locking piece, 35 center part, 36,36L,36R end part 37,37L,37R connecting part, 40L,40R rim 45L, 45R nose pads, 50, 50L, 50R hinges 51,51L,51R first piece, 52,52L,52R first part 53,53L,53R second part, 54,54L,54R leg piece 55,55L,55R Notch, 56,56L,56R Claw 57,57L,57R Second link piece, 58,58L,58R Rotating shaft 60L,60R End piece, 61L,61R Temple, 63L,63R Hinge G1 first interval, G2 second interval, L1,L2 dimensions, M center line, S space

Claims

1. Flip-up eyeglasses in which the first lens is flipped up, a holding frame for holding the first lens; A front bar is disposed in front of the face of the wearer wearing the eyeglasses in a state in which the front bar crosses the face of the wearer wearing the eyeglasses from left to right; a hinge provided on each of the holding frame and the front bar, the hinge supporting the holding frame rotatably relative to the front bar; The front bar has a mounting hole penetrating the front bar in a vertical direction corresponding to the top and bottom of the wearer's face, The hinge is A first link piece provided on the front bar; A second piece provided on the holding frame; a rotation shaft that connects the first piece and the second piece and rotates the second piece relative to the first piece, The first piece includes a leg piece having a shape along the up-down direction, The leg piece is freely inserted into and removed from the mounting hole, The hinge is attached to the front bar with the leg pieces inserted into the mounting holes.

2. an engagement structure for hooking the leg piece onto the inside of the mounting hole when the leg piece is inserted into the mounting hole; The engagement structure includes: A notch cut in a width direction corresponding to the width of the wearer's face; The eyeglasses according to claim 1 , further comprising: a locking piece that fits into the notch.

3. The notch is provided in the leg piece, The eyeglasses according to claim 2 , wherein the locking piece is provided inside the mounting hole.

4. the engagement structure includes a claw piece provided below the locking piece in the up-down direction in a state in which the locking piece is fitted into the notch, The claw piece is provided on the leg piece, The eyeglasses according to claim 3 , wherein the notch is provided on an upper side of the leg piece in the up-down direction of the claw piece.

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