Spectacle frame and hinge structure

Abstract

To provide a spectacle frame and a hinge structure, capable of improving durability of a flip-up mechanism to suppress an increase in the number of manufacturing processes for introducing the flip-up mechanism.SOLUTION: A spectacle frame 1 is a flip-up type spectacle frame that allows for flipping up a lens holding part 30 relative to a frame part 20 worn by a wearer, and comprises a flip-up hinge part 10 that rotatingly moves the lens holding part 30 relative to the frame part 20. The flip-up hinge part 10 includes: a link piece 11 fixed to the frame part 20; a link piece 12 fixed to the lens holding part 30; and two screws 13L, 13R that fix the link piece 11 and the link piece 12 from the left and right, respectively. The link piece 11 has four links, and the link piece 12 has two links. The links of the link piece 12 are inserted into two outer gaps of three gaps of the link piece 11, and fixed with the screws 13L, 13R.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to an eyeglass frame and hinge structure, and more particularly to a flip-up eyeglass frame and hinge structure. [Background technology]

[0002] 2. Description of the Related Art A conventional eyeglass frame is known in which a holding frame that holds lenses and a front bar are rotatably supported by a hinge (see, for example, Patent Document 1).

[0003] This eyeglass frame includes a holding frame, a front bar, and a hinge. The holding frame holds a first lens. The hinge supports the holding frame so that it can rotate freely. The front bar is formed by a first bar portion, a second bar portion, a first bent portion, a second bent portion, and a third bar portion. The second bar portion is curved or inclined rearward in the front-rear direction from the center side in the width direction to the end side. The first bent portion is connected to the first bar portion and is bent rearward in the front-rear direction. The second bent portion is connected to the second bar portion and is bent forward in the front-rear direction. The third bar portion connects the first bent portion and the second bent portion. The hinge includes a first link piece, a second link piece, and an axis portion. The first link piece is fixed to the second bar portion while being adjacent to the third bar portion in the width direction. The second link piece is fixed to the holding frame. The axis portion connects the first link piece and the second link piece, and serves as a rotation axis for the second link piece to rotate.

[0004] Therefore, the distance between the retaining frame and the second bar portion in the front-rear direction of the front bar can be made wider than the distance between the retaining frame and the first bar portion when the first lens is not flipped up. Therefore, the distance between the retaining frame and the front bar can be made wider in the region on the side of the widthwise end, and the space in which the front bar can move forward in the front-rear direction is wider, so that the amount of deformation of the front bar can be increased. This makes it possible to suppress contact between the retaining frame and the front bar when the front bar is deformed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 618596 Summary of the Invention [Problem to be solved by the invention]

[0006] According to the eyeglass frame of the above-mentioned Patent Document 1, contact between the retaining frame and the front bar can be suppressed when the front bar is deformed, but since the two hinges are spaced apart, the hinges are likely to loosen due to deformation of the front bar, and durability is low. In addition, since the two hinges are spaced apart, precision is required when soldering the first and second pieces of the hinges to the front bar and the retaining frame, respectively, and there is a problem that the number of manufacturing steps increases in order to maintain precision.

[0007] Therefore, an object of the present invention is to provide an eyeglass frame and hinge structure that improves the durability of a flip-up mechanism and suppresses an increase in the manufacturing process when a flip-up mechanism is introduced. [Means for solving the problem]

[0008] In order to achieve the above object, one aspect of the present invention provides the following eyeglass frame and hinge structure.

[0009] [1] A flip-up eyeglass frame in which a lens holding section can be flipped up relative to a frame section worn by a wearer, a flip-up hinge portion that rotates the lens holding portion relative to the frame portion, the flip-up hinge portion includes a first piece fixed to the frame portion or the lens holding portion, a second piece fixed to the lens holding portion or the frame portion, and two screws that fix the first piece and the second piece from the left and right, respectively; An eyeglass frame in which the first link piece has four pieces and the second link piece has two pieces, the pieces of the second link piece being inserted into the two outer gaps of the three gaps of the first link piece and fixed to the two central pieces of the first link piece by the two screws. [2] A flip-up eyeglass frame in which a lens holding portion can be flipped up relative to a frame portion worn by a wearer, a flip-up hinge portion that rotates the lens holding portion relative to the frame portion, the flip-up hinge portion includes a first piece fixed to the frame portion or the lens holding portion, a second piece fixed to the lens holding portion or the frame portion, and two screws that fix the first piece and the second piece from the left and right, respectively; An eyeglass frame in which the first piece has three pieces and the second piece has two pieces, and the pieces of the second piece are inserted into the two gaps of the first piece and fixed to the central piece of the first piece by the two screws. [3] A flip-up eyeglass frame in which a lens holding portion can be flipped up relative to a frame portion worn by a wearer, a flip-up hinge portion that rotates the lens holding portion relative to the frame portion, the flip-up hinge portion includes a first piece fixed to the frame portion or the lens holding portion, a second piece fixed to the lens holding portion or the frame portion, and two screws that fix the first piece and the second piece from the left and right, respectively; An eyeglass frame in which the first piece is made up of two double pieces and the second piece is made up of two single pieces, and the two single pieces of the second piece are inserted into the gaps between the two double pieces of the first piece and fixed by the two screws. [4] The eyeglass frame described in any one of [1] to [3], further comprising a washer attached between the two outer gaps of the first link piece and the two links of the second link piece. [5] A first piece is fixed to a first member, a second piece is fixed to a second member, and two screws are provided to fix the first piece and the second piece from the left and right, respectively; The first piece has four pieces and the second piece has two pieces, and the pieces of the second piece are inserted into the two outer gaps of the three gaps of the first piece and fixed to the two central pieces of the first piece by the two screws, forming a hinge structure. [6] A first piece is fixed to a first member, a second piece is fixed to a second member, and two screws are provided to fix the first piece and the second piece from the left and right, respectively; A hinge structure in which the first piece has three pieces and the second piece has two pieces, and the pieces of the second piece are inserted into the two gaps of the first piece and fixed to the central piece of the first piece by the two screws. [7] A hinged hinge has a first piece fixed to a first member, a second piece fixed to a second member, and two screws for fixing the first piece and the second piece from the left and right, respectively; A hinge structure in which the first piece is made up of two double pieces and the second piece is made up of two single pieces, and the two single pieces of the second piece are inserted into the gaps between the two double pieces of the first piece and fixed by the two screws. Effect of the Invention

[0010] According to the present invention, it is possible to improve the durability of the flip-up mechanism and suppress an increase in the number of manufacturing steps required when introducing the flip-up mechanism. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a front view showing an example of the configuration of flip-up eyeglasses. [Diagram 2] 2(a) and (b) are side views showing an example of the configuration of flip-up eyeglasses in a non-flip-up state and a flip-up state, respectively. [Diagram 3] FIG. 3 is a plan view showing an example of the configuration of flip-up type glasses. [Figure 4] FIG. 4 is an enlarged plan view showing an example of the configuration of the flip-up hinge portion. [Diagram 5]5(a) and (b) are side views showing an example of the configuration of a flip-up hinge portion in a non-flipped state and a flip-up state, respectively. [Figure 6] 6(a) to 6(d) are plan views showing an example of the configuration of parts of the flip-up hinge portion. [Figure 7] 7(a) to (d) are side views showing an example of the configuration of parts of a flip-up hinge portion. [Figure 8] FIG. 8 is a plan view showing an example of the configuration of the flip-up hinge portion according to the second embodiment. [Figure 9] 9(a) to 9(d) are plan views showing an example of the configuration of the flip-up hinge portion. [Figure 10] 10(a) to 10(d) are side views showing an example of the configuration of parts of a flip-up hinge portion. [Figure 11] FIG. 11 is a plan view showing an example of the configuration of components of the flip-up hinge portion according to the third embodiment. [Figure 12] 12(a) to 12(d) are plan views showing an example of the configuration of the flip-up hinge portion. [Figure 13] 13(a) to (d) are side views showing an example of the configuration of the flip-up hinge portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] [First embodiment] (Configuration of flip-up glasses) Fig. 1 is a front view showing an example of the configuration of flip-up glasses. Fig. 2(a) and (b) are side views showing an example of the configuration of flip-up glasses in a non-flip-up state and a flip-up state, respectively. Fig. 3 is a plan view showing an example of the configuration of flip-up glasses.

[0013] The flip-up glasses 1 are single flip-up glasses, and have a flip-up hinge section 10, a frame section 20, a lens holding section 30, a lens section 40, a temple section 50, and a hinge section 60. Although the flip-up glasses 1 are shown as a single flip-up type as an example, they may be double flip-up type glasses. The directions used in the explanation of the flip-up glasses 1 are front-back, left-right (LR), and up-down, based on the wearer of the flip-up glasses 1.

[0014] The flip-up hinge portion 10 is soldered to the left and right central regions on the front surface of the frame portion 20 and the left and right central regions on the back surface of the lens holding portion 30, and holds the lens holding portion 30 and the lens portion 40 so that they can be flipped up forward and upward relative to the frame portion 20. The flip-up angle is, for example, 120 degrees, and this angle can be changed depending on the specifications of the flip-up hinge portion 10 described later.

[0015] The frame portion 20 has a brow bar 21, arms 22R and 22L brazed to the brow bar 21, and nose pads 23R and 23L.

[0016] The lens holding portion 30 has a front frame 31 and lens holding frames 32R and 32L. The lens holding frames 32R and 32L hold the lenses 41L and 41R of the lens portion 40 by means of Nylor.

[0017] The lens unit 40 has a lens 41R for the right eye and a lens 41L for the left eye.

[0018] The temple portion 50 has temples 51L, 51R and tip cells 52L, 52R, and is connected to the left and right ends of the frame portion 20 via hinge portions 60L, 60R, respectively.

[0019] (Configuration of flip-up hinge part) Fig. 4 is an enlarged plan view showing an example of the configuration of the flip-up hinge portion 10. Figs. 5(a) and (b) are side views showing an example of the configuration of the flip-up hinge portion 10 in a non-flipped and flipped-up state, respectively. Figs. 6(a) to (d) are plan views showing an example of the configuration of the components of the flip-up hinge portion 10. Figs. 7(a) to (d) are side views showing an example of the configuration of the components of the flip-up hinge portion 10.

[0020] The flip-up hinge portion 10 has, as a first piece, a four-piece piece 11 brazed to the brow bar 21, and as a second piece, a two-piece piece 12 brazed to the front frame 31, screws 13L and 13R fastened to two screw holes 114L and 114R in the two central pieces of the piece 11, and washers 14L and 14R attached to the openings of the through holes 122L and 122R of the piece 12.

[0021] The piece 11 has a surface 110W of the main body 110 that is brazed to the blow bar 21, piece pieces 111L and 111R having through holes 113L and 113R that have openings of a diameter through which the body portions 131L and 131R and the threaded portions 132L and 132R of the screws 13L and 13R pass and recesses for receiving the heads, piece pieces 112L and 112R having screw holes 114L and 114R through which the threaded portions 132L and 132R of the screws 13L and 13R are fastened, gaps 115L and 115R into which the piece pieces 121L and 121R of the piece 12 are inserted, and a gap 116 provided between the piece pieces 112L and 112R. Further, the gaps 115L and 115R have walls 1150L and 1150R for temporarily fixing the rotational position of the piece 12 in the non-flip-up state, and walls 1151L and 1151R for temporarily fixing the rotational position of the piece 12 in the flip-up state.

[0022] The piece 12 has a surface 120w of the main body 120 that is soldered to the front frame 31, piece pieces 121L and 121R that are inserted into the gaps 115L and 115R of the piece 11 and have through holes 122L and 122R through which the threaded portions of the screws 13L and 13R pass, and a gap 122 provided between the piece pieces 121L and 121R.

[0023] The screws 13L and 13R have heads 130L and 130R, unthreaded bodies 131L and 131R, and threaded portions 132L and 132R.

[0024] The washers 14L and 14R are sleeve washers that are inserted to prevent wear on the sliding parts between the piece 11 and the piece 12 and on the body parts 131L and 131R of the screws 13L and 13R, and to ensure smooth sliding. Note that the washers 14L and 14R may be omitted when the material of the piece 11 and the piece 12 is nickel silver or the like, and are not essential components.

[0025] The flip-up hinge portion 10 is assembled by soldering the link piece 11 to the brow bar 21, soldering the link piece 12 to the front frame 31, assembling the sleeve washers 14L and 14R into the through holes 122L and 122R of the link piece 12, respectively, and then inserting the link pieces 121L and 121R into the gaps 115L and 115R of the link piece 11, respectively, and attaching the screws 13L and 13R.

[0026] The pieces 111L, 112L, the piece 121L, the sleeve washer 14L, and the screw 13L form one hinge, and similarly the pieces 111R, 112R, the piece 121R, the sleeve washer 14R, and the screw 13R form one hinge. Since a gap 116 is provided between the piece 112L and the piece 112R, the pieces 111L and 112L and the pieces 111R and 112R have a degree of freedom to be slightly deformed independently by tightening the screws 13L and 13R, and the deformations caused by tightening the screws 13L and 13R do not affect each other. As a result, each hinge can be tightened appropriately, so that the frictional force caused by the sliding of the flip-up hinge part 10 becomes appropriate, and it becomes easy to achieve a state in which rotation and fixing can be compatible, that is, a state in which the so-called wobble force is appropriate.

[0027] (Effects of the First Embodiment) According to the first embodiment described above, the flip-up hinge section 10 with two hinges is provided in the center of the flip-up eyeglasses 1, so that it is less susceptible to the effects of deformation of the brow bar 21 and the front frame 31 and has improved durability compared to when the two hinges are provided with a gap between them. Also, since the two hinges only need to be brazed at one location each to the brow bar 21 and the front frame 31, it is not necessary to position the two hinges relative to each other, and it is possible to suppress an increase in the manufacturing process to ensure the positional accuracy of the two hinges.

[0028] In addition, because the two hinges are integrated, the flip-up hinge section 10 is compact, and because a gap 116 is provided and the structure allows the screws 13L and 13R to be tightened independently from the left and right, it is easy to adjust the holding force and the wriggling force appropriately. Even if the holding force and the wriggling force decrease with use of the flip-up type glasses 1, they can be easily adjusted by tightening the screws, improving maintainability. In addition, because the flip-up hinge section 10 is composed of two hinges, even if one of them stops functioning due to poor adjustment or failure, the other can still function.

[0029] [Second embodiment] (Configuration of flip-up hinge part) Fig. 8 is a plan view showing an example of the configuration of the flip-up hinge part of the second embodiment. Figs. 9(a) to 9(d) are plan views showing an example of the configuration of the parts of the flip-up hinge part. Figs. 10(a) to 9(d) are side views showing an example of the configuration of the parts of the flip-up hinge part.

[0030] The flip-up hinge portion 10A has a three-piece piece 11A brazed to the brow bar 21, a two-piece piece 12A brazed to the front frame 31, screws 13L and 13R fastened to the screw hole 114A of the central piece of piece 11, and washers 14L and 14R attached to both ends of the through holes 122AL and 122AR of piece 12A.

[0031] The piece 11A has a surface 110Aw of the main body 110 that is brazed to the blow bar 21, piece pieces 111AL and 111AR having through holes 113AL and 113AR that have openings with diameters for inserting the bodies 131L and 131R and the threaded parts 132L and 132R of the screws 13L and 13R and recesses for receiving the heads, piece piece 112A having screw holes 114A for fastening the screws 13L and 13R from the left and right, and gaps 115AL and 115AR for inserting the piece pieces 121AL and 121AR of the piece 12A. Unlike the first embodiment, the gap corresponding to the gap 116 is omitted. Also, similar to the first embodiment, gaps 115AL and 115AR have walls 1150AL and 1150AR for temporarily fixing the rotational position of piece 12A in an unflip-up state, and walls 1151AL and 1151AR for temporarily fixing it in a flip-up state.

[0032] The bridge piece 12A, the screws 13L and 13R, and the washers 14L and 14R have the same configurations as those in the first embodiment, and therefore a description thereof will be omitted.

[0033] The pieces 111AL, 112A, the piece 121AL, the sleeve washer 14L, and the screw 13L form one hinge, and similarly the pieces 111AR, 112A, the piece 121AR, the sleeve washer 14R, and the screw 13R form one hinge. The piece 112A has no gap, but the pieces 111AL and 111AR are slightly deformed independently by tightening the screws 13L and 13R, and the forces generated by tightening the screws 13L and 13R do not affect each other. As a result, each hinge can be tightened appropriately, so that the friction generated by the sliding of the flip-up hinge part 10A becomes appropriate, and it becomes easy to achieve a state in which rotation and fixing can be achieved with an appropriate force, that is, a state in which the so-called wobble force is appropriate.

[0034] (Effects of the second embodiment) According to the second embodiment described above, as in the first embodiment, the flip-up hinge part 10A with two hinges is provided in the center of the flip-up eyeglasses 1, so that durability is improved and it is less susceptible to the effects of deformation of the brow bar 21 and the front frame 31 compared to the case where the two hinges are provided with a gap between them. Also, since the two hinges only need to be brazed at one location each to the brow bar 21 and the front frame 31, it is not necessary to position the two hinges relative to each other, and it is possible to suppress an increase in the manufacturing process to ensure the positional accuracy of the two hinges.

[0035] In addition to the effect of the first embodiment, the step of providing a gap corresponding to gap 116 during the manufacture of piece 11A can be omitted.

[0036] [Third embodiment] (Configuration of flip-up hinge part) Fig. 11 is a plan view showing an example of the configuration of the flip-up hinge part of the third embodiment. Figs. 12(a) to (d) are plan views showing an example of the configuration of the flip-up hinge part. Figs. 13(a) to (d) are side views showing an example of the configuration of the parts of the flip-up hinge part.

[0037] The flip-up hinge portion 10B has two two-piece link pieces 11BL and 11BR brazed to the brow bar 21, two one-piece link pieces 12BL and 12BR brazed to the front frame 31, screws 13L and 13R fastened in screw holes 114BL and 114BR of the link pieces 11BL and 11BR, and washers 14L and 14R attached to both ends of through holes 122BL and 122BR of the link pieces 12BL and 12BR.

[0038] The piece pieces 11BL and 11BR have surfaces 110BLw and 110BRw of the main body 110BL and 110BR that are brazed to the brow bar 21, piece pieces 111BL and 111BR having through holes 113BL and 113BR having openings with diameters for inserting the body parts 131L and 131R and the threaded parts 132L and 132R of the screws 13L and 13R and recesses for receiving the heads, piece pieces 112BL and 112BR having screw holes 114BL and 114BR for fastening the screws 13L and 13R, and gaps 115BL and 115BR for inserting the piece pieces 121BL and 121BR of the piece pieces 12BL and 12BR. Unlike the first embodiment, the piece pieces 11BL and 11BR and the piece pieces 12BL and 12BR are each separated into two piece pieces. Further, the gaps 115BL and 115BR have walls 1150BL and 1150BR for temporarily fixing the rotational position of the piece 12B in the non-flip-up state, and walls 1151BL and 1151BR for temporarily fixing the rotational position of the piece 12B in the flip-up state.

[0039] The bridge piece 12B has the same configuration as the first embodiment except that it is divided into bridge pieces 12BL and 12BR, and therefore the description thereof will be omitted. Also, the screws 13L and 13R and the washers 14L and 14R have the same configuration as the first embodiment, and therefore the description thereof will be omitted.

[0040] The flip-up hinge portion 10B is assembled by soldering the link pieces 11BL and 11BR to the brow bar 21, soldering the link pieces 12BL and 12BR to the front frame 31, fitting the sleeve washers 14L and 14R into the through holes 122BL and 122BR of the link pieces 12BL and 12BR, respectively, and then inserting the link pieces 121BL and 121BR into the gaps 115BL and 115BR of the link pieces 11BL and 11BR, respectively, and attaching the screws 13L and 13R.

[0041] The pieces 111BL, 112BL, the piece 121BL, the sleeve washer 14L, and the screw 13L form one hinge, and similarly the pieces 111BR, 112BR, the piece 121BR, the sleeve washer 14R, and the screw 13R form one hinge. Since the piece 112BL and the piece B 112R are not connected, the pieces 111BL and 112BL and the pieces 111BR and 112BR are deformed independently by tightening the screws 13L and 13R, and the forces generated by tightening the screws 13L and 13R do not affect each other. As a result, each hinge can be tightened appropriately, so that the friction generated by the sliding of the flip-up hinge part 10 becomes appropriate, and it becomes easy to achieve a state in which rotation and fixing can be achieved with an appropriate force, that is, a state in which the so-called wobble force is appropriate.

[0042] (Effects of the third embodiment) According to the third embodiment described above, as in the first embodiment, the flip-up hinge part 10B with two hinges is provided in the center of the flip-up eyeglasses 1, so that durability is improved and the effect of deformation of the brow bar 21 and the front frame 31 is less likely to be affected compared to the case where the two hinges are provided with a gap between them. Also, although brazing of the two hinges is required for the brow bar 21 and the front frame 31, respectively, since the relative distance is close, the relative positioning accuracy of the two hinges can be lower compared to the case where they are separated, and an increase in the manufacturing process can be suppressed.

[0043] In addition, because the two hinges are each fastened from the left and right by the screws 13L and 13R, it is easy to adjust the holding power and the tension power appropriately. Even if the holding power and tension power decrease with use of the flip-up type glasses 1, they can be easily adjusted by tightening the screws, improving maintainability. In addition, because the flip-up hinge portion 10B is made up of two hinges, even if one of them stops functioning due to poor adjustment or a malfunction, the other hinge can still function.

[0044] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the present invention.

[0045] For example, an example has been shown in which the first piece is brazed to the brow bar 21 and the second piece is brazed to the front frame 31, but the second piece may be brazed to the brow bar 21 and the first piece may be brazed to the front frame 31.

[0046] In addition, although an example in which the front frame 31 is provided in front of the brow bar 21 has been shown, the front frame 31 may be provided behind the brow bar 21 and connected with the flip-up hinge portion 10. This configuration makes it possible to reduce the thickness in the front-to-rear direction in a plan view. In the flip-up state, the lens portion 40 is in front of the line of sight, but in the case of nearsightedness, this is not a problem because the line of sight is directed downward.

[0047] In addition, the flip-up hinges 10, 10A, and 10B of the present application may be used not only when connecting the lens holder 30 to the frame 20, but also in place of the hinge 60, so long as they are hinge structures that connect any first member and any second member in a relatively rotatable manner. This is particularly useful when the hinge 60 requires high strength due to reasons such as thick temples. They may also be used for other purposes such as flip-up hinges for clip-on sunglasses and movable parts for movable moderns (those with movable earmuff parts at the temple tips). Furthermore, they may be used as hinges for flipping up objects other than glasses, such as goggle shields for helmets and medical face shields. [Explanation of symbols]

[0048] 1: Flip-up glasses 10, 10A, 10B: Flip-up hinge section 11, 11A, 11BL, 11BR: piece 12, 12A, 12BL, 12BR: piece 13L, 13R: Screw 14L, 14R: Washer 20: Frame section 21: Blow Bar 22L, 22R: Clings 23L, 23R: Nose pads 30: Lens holder 31: Front frame 32L, 32R: Lens holder 40: Lens section 41L, 41R: Lens 50: Temple section 60: Hinge part

Claims

1. A flip-up type eyeglass frame capable of flipping up a lens holding part relative to a frame part worn by a wearer, a flip-up hinge portion that rotates the lens holding portion relative to the frame portion, the flip-up hinge portion includes a first piece fixed to the frame portion or the lens holding portion, a second piece fixed to the lens holding portion or the frame portion, and two screws that fix the first piece and the second piece from the left and right, respectively; The eyeglass frame has four first piece pieces and two second piece pieces, with the pieces of the second piece being inserted into the two outer gaps of the three gaps of the first piece piece and fixed to the two central pieces of the first piece piece by the two screws.

2. A flip-up type eyeglass frame capable of flipping up a lens holding part relative to a frame part worn by a wearer, a flip-up hinge portion that rotates the lens holding portion relative to the frame portion, the flip-up hinge portion includes a first piece fixed to the frame portion or the lens holding portion, a second piece fixed to the lens holding portion or the frame portion, and two screws that fix the first piece and the second piece from the left and right, respectively; The eyeglass frame has three first piece pieces and two second piece pieces, with the pieces of the second piece being inserted into the two gaps of the first piece piece and fixed to the central piece of the first piece piece by the two screws.

3. A flip-up type eyeglass frame capable of flipping up a lens holding part relative to a frame part worn by a wearer, a flip-up hinge portion that rotates the lens holding portion relative to the frame portion, the flip-up hinge portion includes a first piece fixed to the frame portion or the lens holding portion, a second piece fixed to the lens holding portion or the frame portion, and two screws that fix the first piece and the second piece from the left and right, respectively; The first piece is made up of two double pieces, the second piece is made up of two single pieces, and the two single pieces of the second piece are inserted into the gaps between the two double pieces of the first piece, respectively, to form an eyeglass frame fixed by the two screws.

4. The eyeglass frame according to any one of claims 1 to 3, further comprising a washer attached between the two outer gaps of the first link piece and the two links of the second link piece.

5. a first piece fixed to a first member, a second piece fixed to a second member, and two screws for fixing the first piece and the second piece from the left and right, respectively; The first piece has four pieces and the second piece has two pieces, and the pieces of the second piece are inserted into the two outer gaps of the three gaps of the first piece and fixed to the two central pieces of the first piece by the two screws, forming a hinge structure.

6. a first piece fixed to a first member, a second piece fixed to a second member, and two screws for fixing the first piece and the second piece from the left and right, respectively; The first piece has three pieces and the second piece has two pieces, and the pieces of the second piece are inserted into the two gaps of the first piece and fixed to the central piece of the first piece by the two screws, forming a hinge structure.

7. a first piece fixed to a first member, a second piece fixed to a second member, and two screws for fixing the first piece and the second piece from the left and right, respectively; The first piece is made up of two double pieces, the second piece is made up of two single pieces, and the two single pieces of the second piece are inserted into the gaps between the two double pieces of the first piece and fixed by the two screws, forming a hinge structure.

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