Spectacle frame

Abstract

To provide a spectacle frame (plastic frame) having a temple unit made of plastic and excelling in flexibility.SOLUTION: A temple unit 3 is made of plastic with a thin wall unit 32 with at least a horizontal width orthogonal to the length direction of the temple unit 3 to be smaller than other portions of the temple unit 3, a temple cover unit 5 is attached to the thin wall unit 32 to cover the thin wall unit 32, a bent unit composed of the thin wall unit 32 and the temple cover unit 5 has lower rigidity in the horizontal direction than in other portions of the temple 3 in a spectacle frame 100 including: a front unit 1 capable of having a pair of lenses L attached; hinge units 2 respectively provided on both ends of the front unit 1; the temple unit 3 attached to the hinge unit 2 to be capable of being revolved; and ear hook units 4 continued to the temple unit 3.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an eyeglass frame, and more particularly to an eyeglass frame having plastic temple portions and excellent flexibility. [Background technology]

[0002] A spectacle frame generally has a front portion to which a pair of lenses can be attached, hinge portions provided on both ends of the front portion, temple portions rotatably attached to the hinge portions, and ear hook portions connected to the temple portions, and is worn by clamping the head with the temple portions and placing the ear hook portions over the ears.

[0003] In eyeglass frames, the temples are generally made flexible since they are spread outward when the eyeglasses are put on or taken off. However, if the flexibility of the entire temple portion is too small, the temple portions on both sides will grip the head too tightly, resulting in compression of the head. On the other hand, if the flexibility of the entire temple portion is too great, the temple portions on both sides will not grip the head tightly enough, causing the eyeglass frame to easily slip out of place. In either case, the eyeglass frames will be uncomfortable to wear. Furthermore, as described above, the temples must be spread outward every time the eyeglass frames are put on or taken off, which places a load on the temples and may result in fatigue failure.

[0004] In response to this, there is known an eyeglass frame in which the temple portions are partially made flexible. For example, a pair of left and right temple members are known, the front ends of which are connected to both ends of a front frame and the rear ends of which have ear hooks that abut the wearer's sides, the temple body being composed of a leaf spring portion formed on the front frame side and a high rigidity portion formed on the rear side of the leaf spring portion, including the ear hooks, and having a greater bending rigidity than the leaf spring portion, the leaf spring portion being formed so that its vertical width is constant or so that it tapers in such a way that the vertical width narrows at a predetermined ratio from the front to the rear, and the thickness of the leaf spring portion is formed so that the relationship between the vertical width of the leaf spring portion, its position in the longitudinal direction, and the position where the high rigidity portion abuts the side of the wearer's head satisfies a predetermined formula (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5699248 Summary of the Invention [Problem to be solved by the invention]

[0006] In the temple member of the eyeglass frame described in the above Patent Document 1, the leaf spring portion is responsible for bending, so that portions of the temple member other than the leaf spring portion can be prevented from suffering fatigue failure.

[0007] However, the eyeglass frame described in Patent Document 1 is a metal frame that uses metal for the temple members. There are two types of eyeglass frames: plastic cell frames and metal frames, both of which are commercially available. Although it is possible to give partial flexibility to a metal frame, like the temple members of the eyeglass frame described in the above Patent Document 1, a cell frame is made of plastic and does not have sufficient flexibility.

[0008] The present invention has been made in consideration of the above circumstances, and has an object to provide an eyeglass frame (cell frame) having plastic temple portions, which has excellent flexibility. [Means for solving the problem]

[0009] The inventors discovered that the above problem could be solved by providing a bending portion in the temple portion, which is made up of a thin-walled portion and a temple cover portion, and making the bending portion less rigid in the left-right direction than other portions of the temple portion, and thus completed the present invention.

[0010] The present invention relates to an eyeglass frame having a front portion on which a pair of lenses can be attached, hinge portions provided on both ends of the front portion, a temple portion rotatably attached to the hinge portions, and an ear hook portion continuous with the temple portion, wherein the temple portion is made of plastic and has a thin-walled portion whose left-right width perpendicular to at least the longitudinal direction of the temple portion is smaller than that of other portions of the temple portion, a temple cover portion is attached to the thin-walled portion so as to cover the thin-walled portion, and the bending portion consisting of the thin-walled portion and the temple cover portion has less rigidity in the left-right direction than the other portions of the temple portion.

[0011] In the eyeglass frame of the present invention, the thin-walled portion is a portion in which the left-right width perpendicular to the longitudinal direction of the temple portion and the up-down width perpendicular to the longitudinal direction are stepped smaller than the other portions of the temple portion, and it is preferable that the outer surface of the temple cover portion is flush with the outer surface of the other portions of the temple portion.

[0012] In the eyeglass frame of the present invention, it is preferable that the temple portion comprises a front portion rotatably attached to the hinge portion, a thin portion continuous with the front portion, and a rear portion continuous with the thin portion, and that the other portion of the temple portion is the front portion or the rear portion, and that the front portion, the thin portion, and the rear portion are integrally molded from the same material.

[0013] In the eyeglass frame of the present invention, it is preferable that the thin portion has a rectangular shape in cross section, and that a plate-shaped reinforcing plate is embedded in the thin portion.

[0014] In the eyeglass frame of the present invention, it is preferable that the thin-walled portion is rectangular in cross section, a plate-shaped reinforcing plate is embedded in the thin-walled portion, the front end of the reinforcing plate extends beyond the front end of the thin-walled portion and enters the front side portion and is embedded in said front side portion, and the rear end of the reinforcing plate extends beyond the rear end of the thin-walled portion and enters the rear side portion and is embedded in said rear side portion.

[0015] In the eyeglass frame of the present invention, it is preferable that the reinforcing plate has a plate-shaped main body portion, an upper rib portion provided at the upper end of the main body portion and protruding upward from the upper end, and a lower rib portion provided at the lower end of the main body portion and protruding downward from the lower end, and that the main body portion, the upper rib portion and the lower rib portion are embedded in the thin-walled portion.

[0016] In the eyeglass frame of the present invention, the reinforcing plate has a plate-shaped main body portion, an inner rib portion provided on the inner side of the main body portion and protruding inwardly from the inner side, and an outer rib portion provided on the outer side of the main body portion and protruding outwardly from the outer side, and it is preferable that positioning holes are provided on the left and right sides of the reinforcing plate in the thin-walled portion, and the reinforcing plate is positioned by inserting the inner rib portion and the outer rib portion into the corresponding positioning holes.

[0017] In the eyeglass frame of the present invention, it is preferable that the temple cover portion is made of an elastomer.

[0018] In the eyeglass frame of the present invention, it is preferable that the ear hook portion has a core material and an ear hook cover portion attached to the core material so as to cover the core material, and that the front end of the core material extends into the rear side portion and is embedded in the rear side portion. Effect of the Invention

[0019] In the eyeglass frame of the present invention, the plastic temple portion has a bending portion consisting of a thin-walled portion with a reduced left-right width and a temple cover portion, and since the bending portion has less rigidity in the left-right direction than other parts of the temple portion, the bending portion can be used to improve the left-right flexibility of the temple portion. As a result, in the above-mentioned eyeglass frame, even if the tightening of the temple portions on both sides when clamping the head is set to a strength that prevents the eyeglass frame from slipping, the flexibility of the bending portion can prevent the head from being compressed. Furthermore, since the temple portion has a bent portion, even if the temple portion is spread outward when putting on or taking off the glasses, the bent portion can prevent a load from being applied to the entire temple portion. Therefore, the above-mentioned eyeglass frame is comfortable to wear and can prevent fatigue damage to the temples.

[0020] Furthermore, since the eyeglass frame has a temple cover portion attached to the thin portion, the narrow thin portion can be sufficiently reinforced, and fatigue failure of the bent portion itself can be prevented. In addition, by coloring the temple cover in a color different from that of the temple, it is possible to add design features. Furthermore, by making the temple cover portion from an elastomer, the surface can be made less slippery and the temple cover portion can easily conform to the bending of the thin portion.

[0021] In the eyeglass frame of the present invention, the thin-walled portion is a portion whose left-right width and top-bottom width are stepped smaller than the other portions of the temple portion, so that the temple cover portion can be fitted into the area around the thin-walled portion, thereby making it difficult for the temple cover portion to come off the thin-walled portion. In this case, by making the outer surface of the temple cover portion flush with the outer surface of the other parts of the temple portion, the temple portion can be easily gripped and the shape of the temple portion can be made smart and linear.

[0022] In the eyeglass frame of the present invention, the front portion, the thin portion, and the rear portion are integrally molded from the same material, thereby making it possible to reduce the number of manufacturing steps and also reduce manufacturing costs. Furthermore, in the eyeglass frame, the thin portion is located between the front and rear portions, so that the load on the hinge portion during bending can be reduced. In addition, the rear portion has greater rigidity than the thin portion and is less likely to bend, so that the head can be gripped firmly.

[0023] In the eyeglass frame of the present invention, the bent portion can be further reinforced by embedding a plate-shaped reinforcing plate in the thin portion, which further prevents the bent portion itself from causing fatigue failure. In this case, by making the reinforcing plate a small piece having a front end and a rear end, rather than a so-called core material, the weight load on the temple portion can be reduced, and the manufacturing cost can also be reduced. Furthermore, by configuring the reinforcing plate so that the front end is embedded in the front side portion and the rear end is embedded in the rear side portion, it is possible to reliably reinforce the entire thin portion.

[0024] In the eyeglass frame of the present invention, when the reinforcing plate has an upper rib portion and a lower rib portion in addition to the main body portion, these are embedded in the thin-walled portion, thereby preventing the reinforcing plate from shifting in position due to bending. In the eyeglass frame of the present invention, when the reinforcing plate has an inner rib portion and an outer rib portion in addition to the main body portion, the inner rib portion and the outer rib portion are inserted into the corresponding positioning holes, so that the reinforcing plate can be positioned in the front-rear direction and the up-down direction. Also, as described above, it is possible to prevent the reinforcing plate from being displaced due to bending.

[0025] In the eyeglass frame of the present invention, it is possible to add design features by coloring the ear covers in a color different from that of the temple covers and temples. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a side view showing one embodiment of an eyeglass frame according to the present invention. [Diagram 2] FIG. 2 is a front view of the eyeglass frame shown in FIG. [Diagram 3] FIG. 3 is a top view of the eyeglass frame shown in FIG. [Figure 4] 4 is an enlarged perspective view of a thin portion and a temple cover portion of the eyeglass frame shown in FIG. [Diagram 5] FIG. 5 is a cross-sectional view of the temple portion of FIG. 1 taken along a horizontal plane including the line AA. [Figure 6] FIG. 6(a) is a side view showing a reinforcing plate used in the eyeglass frame shown in FIG. 1, and FIG. 6(b) is a top view showing the reinforcing plate used in the eyeglass frame shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings as necessary. In the drawings, the same elements are given the same reference numerals, and duplicated explanations will be omitted. Furthermore, the dimensional ratios of the drawings are not limited to the ratios shown in the drawings.

[0028] In this specification, the horizontal direction perpendicular to the length direction of the temple portion is referred to as the left-right direction, and the width of the temple portion (thin portion) in the left-right direction is referred to as the left-right width. In addition, the vertical direction perpendicular to the length of the temple portion is referred to as the up-down direction, and the width of the temple portion (thin portion) in the up-down direction is referred to as the up-down width. In addition, when wearing eyeglass frames, the side facing the head in relation to the temples is called the inside, and the opposite side is called the outside. Furthermore, "fatigue fracture" means that fracture occurs due to repeated plastic deformation, and "brittle fracture" means that fracture occurs due to stress that exceeds elastic deformation. Moreover, "higher rigidity" than the comparative object means inferior flexibility, and "lower rigidity" than the comparative object means superior flexibility.

[0029] FIG. 1 is a side view showing one embodiment of an eyeglass frame according to the present invention. The eyeglass frame 100 according to this embodiment comprises a front section 1 on which a pair of lenses L can be attached, hinge sections 2 provided on both ends of the front section 1, a temple section 3 rotatably attached to the hinge sections 2, an ear hook section 4 continuous with the temple section 3, and a temple cover section 5 attached to a thin section 32 of the temple section 3. In the eyeglass frame 100, the portion consisting of the thin section 32 and the temple cover section 5 is also referred to as a bent section. Therefore, the eyeglass frame 10 is made up of a front portion 1, a hinge portion 2, a temple portion 3, an ear hook portion 4, and a temple cover portion 5, and has a lightweight and simple structure.

[0030] In the eyeglass frame 100, a pair of lenses L can be attached to the front part 1. This allows the eyeglass frame 100 to be used as eyeglasses with various functions depending on the attached lenses L. It is also possible to use the eyeglass frame 100 as a fashion eyeglass frame without lenses L. Examples of the lens L include corrective lenses for myopia, hyperopia, astigmatism, presbyopia, and both, lenses for color vision correction, lenses for blocking ultraviolet rays, blocking blue light, shading (color lenses), lenses for dust protection, and lenses for fashion glasses. Furthermore, the lens L may be made of plastic or glass.

[0031] Fig. 2 is a front view of the eyeglass frame shown in Fig. 1. Note that the temple portion and ear hook portion on one side are omitted, and the temple portion and ear hook portion on the other side are shown in a folded state. As shown in FIG. 2, in the eyeglass frame 100, the front portion 1 has a pair of left and right rim portions 10 for holding the lenses L, a bridge portion 11 bridging the two rim portions 10, and nose pad portions 12 attached to both rim portions 10, respectively. Incidentally, since the structure of the front portion 1 is publicly known, a detailed description thereof will be omitted. Incidentally, as will be described later, the temple portion 2 is mainly made of plastic, but the rim portion 10 and the bridge portion 11 may be made of either plastic or metal.

[0032] The hinge portions 2 are provided on both sides of the front portion 1. The hinge portion 2 is located at the portion connecting the front portion 1 and the temple portion 3, and is a component for enabling the temple portion 3 to rotate relative to the front portion 1 around the hinge portion 2. This makes it possible to fold the temple portion 3 extending rearward from the front portion 1 so that it is positioned on the back side of the front portion 1. Incidentally, since the structure of the hinge portion 2 is publicly known, a detailed description thereof will be omitted.

[0033] Fig. 3 is a top view of the eyeglass frame shown in Fig. 1. The temple parts 3 on both sides attached to the front part 1 are plane-symmetrical to each other, and therefore have the same shape, dimensions, etc. As shown in FIG. 3, the temple portions 3 are curved so as to bulge outward in a top view, so as to conform to the shape of the head as much as possible when the eyeglass frame 100 is worn. The temple portion 3 is composed of a front portion 31 rotatably attached to the hinge portion 2 , a thin portion 32 continuous with the front portion 31 , and a rear portion 33 continuous with the thin portion 32 .

[0034] In the temple portion 3, the thin portion 32 is located between the front portion 31 and the rear portion 33, making it possible to easily bend only the rear portion 33 and the ear hook portion 4 left and right relative to the front portion 1 and the front portion 31. Furthermore, since the front side portion 31, which has a greater rigidity than the thin portion 32, is provided in front of the thin portion 32, the load applied to the hinge portion 2 during bending can be reduced. In addition, the rear side portion 33, which has greater rigidity than the thin portion 32, is provided behind the thin portion 32, so that the head can be firmly gripped.

[0035] Moreover, the temple portion 3 is arranged in the order of the front portion 31, the thin portion 32, and the rear portion 33, which are integrally molded from the same material. This makes it possible to reduce the number of manufacturing steps and the manufacturing costs. Here, the temple portion 3 is made of plastic. Therefore, the temple portion 3 is less susceptible to scratches and has improved durability. In addition, it is also possible to easily impart design features. As such a plastic material, celluloid, acetate, ultem, polyamide, polyphenylsulfone, etc. can be used, and among these, it is preferable to use ultem, polyamide or polyphenylsulfone as the plastic material.

[0036] Returning to FIG. 1, in the temple portion 3, the front portion 31 is in the shape of a rod extending in the front-rear direction and having a generally rectangular cross section. The front side portion 31 is attached to the hinge portion 2 via an attachment portion provided at its front end, and a thin portion 32 is provided at its rear end. At this time, the surfaces of the front and rear ends of the front portion 31 are inclined planes so that the further downward the surface is, the more rearward it becomes, and are approximately parallel to the overall inclination of the front portion in a side view. This provides a symmetrical effect and provides excellent design.

[0037] The rear side portion 33 is shaped like a rod extending in the front-rear direction and having a generally rectangular cross section. The rear portion 33 has a thin portion 32 at its front end and an ear hook portion 4 at its rear end. In this case, the surfaces of the front and rear ends of the rear portion 33 are inclined planes that are inclined downwards toward the rear and are generally parallel to the overall inclination of the front portion in a side view, thereby achieving a symmetrical effect and excellent design.

[0038] In the temple portion 3, the thin portion 32 is disposed forward of the middle portion of the entire temple portion 3. This makes it easier to grasp the bent portion consisting of the thin portion 32 and the temple cover portion 5 that covers it when putting on or taking off the eyeglass frame, so there is an advantage in that it is easier to put on and take off by utilizing the flexibility of the bent portion.

[0039] Fig. 4 is an enlarged perspective view of the thin-walled portion and temple cover portion of the eyeglass frame shown in Fig. 1. Note that Fig. 4 omits the illustration of the reinforcing plate, and also omits the illustration of the depressions on the surface of the thin-walled portion caused by the rim portion of the reinforcing plate. As shown in FIG. 4, in the temple portion 3, the thin-walled portion 32 is a portion where the left-right width of the temple portion 3 is made stepwise smaller than the left-right widths of the other portions of the temple portion 3, that is, the front portion 31 and the rear portion 33. The thin portion 32 is a portion in which the vertical width of the temple portion 3 is made smaller in a stepped manner than the vertical width of the other portions of the temple portion main body 3, that is, the front portion 31 and the rear portion 33. That is, the thin portion 32 has a generally rectangular cross-sectional shape whose periphery is narrower overall than the front portion 31 and the rear portion 33 .

[0040] Returning to FIG. 3, in the thin-walled portion 32, the left-right width H1 is approximately constant in the longitudinal direction, and is included at least in the range of the left-right width H1 described below. Here, the range of the left-right width H1 (see FIG. 3) of the thin-walled portion 32 is preferably 1.0 to 3.0 mm. If the left-right width H1 of the thin-walled portion 32 is less than 1.0 mm, there is a drawback that the strength is insufficient and brittle fracture is more likely to occur than when the left-right width H1 is within the above range, and if the left-right width H1 of the thin-walled portion 32 exceeds 3.0 mm, there is a drawback that the flexibility is insufficient and brittle fracture is more likely to occur than when the left-right width H1 is within the above range. In addition, it is preferable that the ratio between the left-right width HX1 at the rear end of the front portion 31 and the left-right width H1 of the thin portion 32 is 1:0.2 to 0.7 at any point of the thin portion 32, and it is preferable that the ratio between the left-right width HX2 at the front end of the rear portion 33 and the left-right width H1 of the thin portion 32 is 1:0.3 to 0.8 at any point of the thin portion 32. When the left / right width ratio is within the above range, sufficient flexibility can be exhibited and durability is also excellent. Moreover, it is preferable that the left-right width HX1 at the rear end of the front side portion 31 is larger than the left-right width HX2 at the front end of the rear side portion 33.

[0041] In the thin portion 32, the vertical width H2 is approximately constant in the length direction, and is included at least in the range of the vertical width H2 described below. The vertical width H2 (see FIG. 1) of the thin-walled portion 32 is preferably 2.0 to 8.0 mm. If the vertical width H2 of the thin-walled portion 32 is less than 2.0 mm, there is a drawback in that the strength is insufficient and brittle fracture is more likely to occur than when the vertical width H2 is within the above range, and if the vertical width H2 of the thin-walled portion 32 exceeds 8.0 mm, there is a drawback in that the weight is too large compared to when the vertical width H2 is within the above range. In addition, it is preferable that the ratio between the vertical width HY1 at the rear end of the front portion 31 and the vertical width H2 of the thin portion 32 is 1:0.2 to 0.9 at any point of the thin portion 32, and it is preferable that the ratio between the vertical width HY2 at the front end of the rear portion 33 and the vertical width H2 of the thin portion 32 is 1:0.2 to 0.9 at any point of the thin portion 32. If the ratio of the vertical width is within the above range, there is an advantage that the temple cover portion 5 attached to the periphery of the thin portion 32 is less likely to slip off from the thin portion 32. Moreover, it is preferable that the vertical width HY1 at the rear end of the front side portion 31 is greater than the vertical width HY2 at the front end of the rear side portion 33.

[0042] The length H3 (see FIG. 1) of the thin portion 32 in the front-rear direction is preferably 30 mm or more, and more preferably 30 to 50 mm. If the length H3 of the thin portion 32 in the front-rear direction is less than 30 mm, the temple portion 3 has a smaller flexible region during plastic deformation than when the length H3 is within the above range, which is disadvantageous in that it is difficult to handle, and if the length H3 of the thin portion 32 in the front-rear direction exceeds 50 mm, the temple portion 3 has a longer flexible region than when the length H3 is within the above range, which is disadvantageous in that the eyeglass frame is more likely to slip out of place.

[0043] FIG. 5 is a cross-sectional view of the temple portion of FIG. 1 taken along a horizontal plane including the line AA. As shown in Fig. 5, in the thin portion 32, the plate-shaped reinforcing plate 6 is embedded vertically along the length direction of the thin portion 32. That is, the reinforcing plate 6 is embedded with its surface facing sideways (see Fig. 1). This makes it possible to reinforce the bending portion (reinforcing portion 35 and temple cover portion 5) without impeding bending in the left-right direction, and to prevent the bending portion itself from causing fatigue failure.

[0044] The material for the reinforcing plate 6 may be metal materials such as stainless steel, iron, copper, titanium (including β-titanium), nickel, or alloys containing these, or resin materials such as reinforced plastic resins containing carbon fiber or glass fiber, and hard rubber. Among these, from the viewpoints of weight, elasticity, and strength, it is preferable to employ stainless steel or titanium (including β titanium) as the reinforcing plate 6, and it is more preferable to employ β titanium.

[0045] The reinforcing plate 6 is a small piece having a front end and a rear end, which reduces the weight load on the temple portion 3 and reduces the manufacturing cost. The front end of the reinforcing plate 6 passes over the front end of the thin portion 32, enters the front side portion 31 and is embedded in the front side portion 31, and the rear end of the reinforcing plate 6 passes over the rear end of the thin portion 32, enters the rear side portion 33 and is embedded in the rear side portion 33. In other words, the length of the reinforcing plate 6 in the front-to-rear direction is longer than the length of the thin portion 32 in the front-to-rear direction. This ensures that the entire thin portion 32 is reinforced. In this case, it is preferable that the length H4 of the reinforcing plate 6 in the front-rear direction is 5 mm or more.

[0046] FIG. 6(a) is a side view showing a reinforcing plate used in the eyeglass frame shown in FIG. 1, and FIG. 6(b) is a top view showing the reinforcing plate used in the eyeglass frame shown in FIG. As shown in Figures 6(a) and (b), the reinforcing plate 6 has a plate-shaped main body portion 6a, upper rib portions 6b1 provided at two locations on the upper end of the main body portion 6a and protruding upward from the upper end, lower rib portions 6b2 provided at two locations on the lower end of the main body portion 6a and protruding downward from the lower end, inner rib portions 6c1 provided at three locations on the inner side surface of the main body portion 6a and protruding inward from the inner side surface, and outer rib portions 6c2 provided at three locations on the outer side surface of the main body portion 6a and protruding outward from the outer side surface. At this time, the two upper rib portions 6b1 and the two lower rib portions 6b2 are provided at positions symmetrical to each other with respect to the main body portion 6a. The three inner rib portions 6c1 and the three outer rib portions 6c2 are disposed at equal intervals on the main body portion 6a and are provided at symmetrical positions with respect to the main body portion 6a.

[0047] In the temple portion 3, since the upper rib portion 6b1 and the lower rib portion 6b2 are provided on the reinforcing plate 6, it is possible to prevent the reinforcing plate from being displaced due to bending of the bending portion when the reinforcing plate 6 is embedded. Furthermore, the thin portion 32 is provided with positioning holes on the left and right sides of the reinforcing plate 6, and the inner rib portion 6c1 and the outer rib portion 6c2 are inserted into the corresponding positioning holes to position the reinforcing plate 6. As described above, there is also an advantage that the reinforcing plate can be prevented from being displaced due to bending of the bent portion. The method for embedding the reinforcing plate 6 in the thin portion 32 is not particularly limited, but examples thereof include placement molding, lamination molding, and the like.

[0048] 4, in the temple portion 3, the temple cover portion 5 is attached to the thin-walled portion 32 so as to cover the thin-walled portion 32. In other words, the temple portion 3 has a hollow portion, and is attached to the thin-walled portion 32 so that the thin-walled portion 32 is located in the hollow portion. Specifically, the thin portion 32 has a stepped diameter smaller than the front portion 31 and the rear portion 33, so that the temple cover portion 5 can be fitted into the stepped area around the thin portion 32. This makes it difficult for the temple cover portion 5 to come off the thin portion 32.

[0049] In the eyeglass frame 100, by providing the temple cover portion 5, the thin portion 32 can be sufficiently reinforced, and fatigue failure of the bent portion itself can be suppressed. Moreover, by coloring the temple cover portion 5 in a color different from that of the temple portion 3, it is possible to impart design features.

[0050] The outer surface of the temple cover part 5 is flush with the outer surfaces of the front part 31 and the rear part 33, which are the other parts of the temple part 3. This makes it easier to grip the temple part 3 and allows the shape of the temple part 3 to be a smart line shape.

[0051] Here, the temple cover portion 5 is not particularly limited, but may be made of fabric such as woven fabric, knitted fabric, or nonwoven fabric, or a molded body made of elastomer. In this case, the surface of the temple cover portion 5 can be made less slippery, and the temple cover portion 5 can easily follow the bending of the thin portion 32. Among these, the temple cover part 5 is preferably a molded body made of an elastomer. That is, the material of the temple cover part 5 is preferably an elastomer. In this case, it becomes easy to design and manufacture the temple cover part 5 so that the outer surface of the temple cover part 5 is flush with the outer surfaces of the front part 31 and the rear part 33. As such elastomer, it is possible to use thermosetting elastomers such as natural rubber, synthetic rubber, urethane rubber, silicone rubber, fluororubber, etc., and thermoplastic elastomers such as polystyrene, olefin, polyvinyl chloride, polyurethane, polyester, polyamide, etc. Among these, it is preferable to use silicone rubber as the material for the temple cover part 5.

[0052] The eyeglass frame 100 has a bending portion consisting of the thin portion 32 and the temple cover portion 5, and the bending portion has less rigidity in the left-right direction than the front portion 31, the rear portion 33, and the ear hook portion 4. This allows the eyeglass frame 100 to improve the left-right flexibility of the temple portion 3 by bending the bending portion.

[0053] Returning to Figure 1, in the eyeglass frame 100, the ear hook portion 4 curves inward and downward as it moves toward the rear, and has a core-sheath structure having a core material 41 and an ear hook cover portion 42 attached to the core material 41 so as to cover the core material 41. In addition, since the material of the core 41 and the core-sheath structure of the ear hook portion 4 are well known, detailed description thereof will be omitted.

[0054] In the ear hook portion 4 , the front end of the core material 41 enters the rear side portion 33 and is embedded in the rear side portion 33 . In other words, the core material 41 is not continuous with the typical hinge portion 2, but extends rearward from the rear side portion 33, thereby reducing the weight load on the temple portion 3 and reducing manufacturing costs.

[0055] In the ear hook part 4, the ear hook cover part 42 is not particularly limited, but may be made of fabric such as woven fabric, knitted fabric, nonwoven fabric, or elastomer molded body, as in the above-mentioned temple cover part 5. In this case, the surface can be made non-slip and it can be easily attached to the curved core material 41. Among these, it is preferable that the ear cover part 42 is a molded body made of an elastomer. That is, it is preferable that the material of the ear cover part 42 is an elastomer. In this case, it is easy to design and manufacture the ear cover part 42 so that the outer surface of the ear cover part 42 is flush with the outer surface of the rear part 33. The material of the ear cover portion 42 may be the same as the material of the temple cover portion 5, or may be different.

[0056] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments.

[0057] In the eyeglass frame 100 of this embodiment, the front portion 1 has a pair of left and right rim portions 10 for holding the lenses L, a bridge portion 11 bridging both rim portions 10, and nose pad portions 12 attached to both rim portions 10, but is not limited to this structure. For example, the front portion may have a so-called rimless structure that does not have a rim portion, or may have a structure without nose pads that does not have the nose pad portion 12. Similarly, the ear hook portion 4 has a core-sheath structure having a core material 41 and an ear hook cover portion 42 attached to the core material 41 so as to cover the core material 41, but is not limited to this structure. For example, the ear hook portion may not have a core material and may be made of a single resin.

[0058] In the eyeglass frame 100 according to this embodiment, the temple portion 3 is made up of a front portion 31, a thin portion 32, and a rear portion 33, but is not limited thereto and may include other parts, etc. However, it is essential that the temple portion has a thin portion. Furthermore, the surfaces of the front end and the rear end of the front side portion 31 and the rear side portion 33 are inclined so that they are more rearward as they go downward, but this is not essential.

[0059] In the eyeglass frame 100 of this embodiment, the thin-walled portion 32 is a portion in which the left-right width of the temple portion 3 is made smaller in a stepped manner than the left-right widths of the other portions of the temple portion main body portion 3, that is, the front portion 31 and the rear portion 33; however, as long as the left-right width is smaller, it does not have to be stepped. In addition, the thin-walled portion 32 is a portion in which the vertical width of the temple portion 3 is made smaller in a stepped manner than the vertical width of the other parts of the temple portion main body 3, that is, the front portion 31 and the rear portion 33, but the vertical width does not have to be smaller. In other words, it is sufficient that the thin portion has a width from left to right smaller than the width from left to right of the other portions of the temple portion.

[0060] In the eyeglass frame 100 according to this embodiment, the left-right width H1 of the thin-walled portion 32 is substantially constant in the length direction, but is not limited to this and may be tapered so that the left-right width gradually decreases. In addition, the surface of the thin-walled portion is linear in side view, but may be arched, V-shaped, zigzag, wavy, etc. Even if the left-right width varies, it is preferable that the dimension of the left-right width is within the above-mentioned range. The same applies to the vertical width H2 of the thin portion 32.

[0061] In the eyeglass frame 100 of this embodiment, the reinforcing plate 6 is a small piece having a front end and a rear end, but is not limited to this. For example, the front end may be connected to the hinge portion or may be connected to the core material 41 of the ear hook portion 4. Further, the reinforcing plate 6 has the upper rib portion 6b1, the lower rib portion 6b2, the inner rib portion 6c1, and the outer rib portion 6c2, but these rib portions are not essential.

[0062] In the eyeglass frame 100 of this embodiment, the outer surface of the temple cover portion 5 is flush with the outer surfaces of the other parts of the temple portion 3, the front portion 31 and the rear portion 33, all around, but this is not essential.

[0063] In the eyeglass frame 100 according to this embodiment, the ear covers 42 are made of the same material as the temple covers 5, but this is not essential. [Industrial Applicability]

[0064] The eyeglass frame of the present invention can be used as so-called eyeglasses by attaching a pair of lenses, or can be used as a fashion eyeglass frame when no lenses are attached. The eyeglass frame of the present invention has a bent portion and is therefore excellent in flexibility, resulting in excellent wearing comfort and suppressing fatigue failure of the temple portions. [Explanation of symbols]

[0065] 1. Front section 10 Rim section 11 Bridge section 12 Nose pad 100···Eyeglass frames 2. Hinge part 3. Temple section 31 Front side 32 Thin section 33 Rear side 4. Ear hook 41 Core material 42 Ear hook cover 5 Temple cover 6. Reinforcement plate 6a Main body 6b1: Upper rib 6b2 Lower rib 6c1...Inner rib 6c2: Outer rib L··· Lens

Claims

1. A spectacle frame having a front portion on which a pair of lenses can be attached, hinge portions provided at both ends of the front portion, temple portions rotatably attached to the hinge portions, and ear hook portions continuous with the temple portions, The temple portion is made of plastic and has a thin-walled portion having a width perpendicular to the longitudinal direction of the temple portion that is smaller than that of other portions of the temple portion, A temple cover portion is attached to the thin portion so as to cover the thin portion, An eyeglass frame, wherein a bent portion consisting of the thin portion and the temple cover portion has less rigidity in the left-right direction than other portions of the temple portion.

2. The thin-walled portion is a portion in which a left-right width perpendicular to the length direction of the temple portion and a top-bottom width perpendicular to the length direction are made smaller in a stepped manner than other portions of the temple portion, 2. The eyeglass frame according to claim 1, wherein an outer surface of said temple cover portion is flush with an outer surface of the other portion of said temple portion.

3. the temple portion includes a front portion rotatably attached to the hinge portion, the thin portion continuous with the front portion, and a rear portion continuous with the thin portion, the other portion of the temple portion is the front portion or the rear portion, 2. The eyeglass frame according to claim 1, wherein said front portion, said thin portion and said rear portion are integrally molded from the same material.

4. The thin-walled portion has a rectangular cross-sectional shape, 2. The eyeglass frame according to claim 1, wherein a plate-shaped reinforcing plate is embedded in said thin portion.

5. The thin-walled portion has a rectangular cross-sectional shape, A plate-shaped reinforcing plate is embedded in the thin-walled portion, 4. The eyeglass frame of claim 3, wherein the front end of the reinforcing plate extends beyond the front end of the thin portion, enters the front side portion and is embedded in the front side portion, and the rear end of the reinforcing plate extends beyond the rear end of the thin portion, enters the rear side portion and is embedded in the rear side portion.

6. The reinforcing plate has a plate-shaped main body portion, an upper rib portion provided at an upper end of the main body portion and protruding upward from the upper end, and a lower rib portion provided at a lower end of the main body portion and protruding downward from the lower end, 6. The eyeglass frame according to claim 4, wherein the main body, the upper rib and the lower rib are embedded in the thin portion.

7. The reinforcing plate has a plate-shaped main body portion, an inner rib portion provided on an inner side surface of the main body portion and protruding inwardly from the inner side surface, and an outer rib portion provided on an outer side surface of the main body portion and protruding outwardly from the outer side surface, The thin-walled portion is provided with positioning holes on the left and right sides of the reinforcing plate, The eyeglass frame according to claim 4 or 5, wherein the reinforcing plate is positioned by inserting the inner rib portion and the outer rib portion into the corresponding positioning holes.

8. 2. The eyeglass frame according to claim 1, wherein the temple cover portion is made of an elastomer.

9. The ear hook portion has a core material and an ear hook cover portion attached to the core material so as to cover the core material, 9. The eyeglass frame according to claim 1, wherein a front end of said core material extends into said rear portion and is embedded in said rear portion.

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