Eyeglass rims and eyeglasses using them

Abstract

To provide a rim for spectacles having the excellent appearance emphasizing an inner and outer peripheral surface by taking advantage of a cross-sectional shape of the rim and also to provide spectacles which have the excellent appearance and can prevent breakage of a lens or the rim.SOLUTION: In a rim 100 for spectacles arranged around a lens 110, a position of a centroid 6 of a cross-sectional shape which appears when cutting in a normal direction of a ridgeline of the outer periphery or the inner periphery of the rim 100 for the spectacles is set to be closer to the lens 110 side than a position 5 of the center in an outermost shape of the cross-sectional shape.SELECTED DRAWING: Figure 1

Description

【Technical Field】 【0001】 The present invention relates to a rim for glasses used in glasses having a rim disposed around a lens and glasses using the same. 【Background Art】 【0002】 Glasses for vision correction, sunglasses, etc. (hereinafter, these are collectively referred to as "glasses") have various forms depending on the frame configuration. One of the main forms is a form provided with a part called a rim for fixing a lens. A general rim is an "edge" made of resin or metal, and its main role is to sandwich and support the outer peripheral portion of the lens. In addition, since the rim is disposed around the eyes when the glasses are worn, it is also an important aesthetic element that affects the impression of the wearer. 【0003】 Examples of the form of glasses using a rim include a full rim and a half rim. The full rim is a form in which the entire outer periphery of the lens is surrounded and sandwiched by a ring-shaped rim for fixing. It has the characteristic that the shape, color, pattern, etc. (hereinafter referred to as "shape, etc.") of the rim greatly affects the impression of the wearer. The half rim is a form in which the rim is abutted only on the upper side or the lower side of the lens, and the opposite side is suspended by a resin thread, and the lens is sandwiched and fixed by the rim and the resin thread. Since the rim is disposed only above or below the eyes of the wearer, it gives the wearer a different impression from that of the full rim. On the other hand, there is also a form called rimless as glasses that do not use a rim. Rimless is a form in which a part of the frame such as the temple and the bridge and the lens are directly fixed. Since there is no rim disposed around the outer periphery of the lens, it has the characteristic that the shape, etc. of the rim hardly affects the impression of the wearer. 【0004】 Thus, eyeglasses can have various external characteristics depending not only on the shape of the rim, but also on how the rim surrounds the lens. For this reason, efforts have been made to devise the cross-sectional shape of the rim in order to create eyeglasses with a distinctive appearance, and many technologies have been disclosed that can create a unique appearance by using a rim with a specific cross-sectional shape. 【0005】 For example, Patent Document 1 is a publication of the applicant's previous patent application, which describes an improved cross-sectional shape of the rim. Patent Document 1 discloses a rim wire technology in which a groove for fitting a lens is provided on the inner circumferential surface of the rim, as well as a groove on the outer circumferential surface of the rim. 【0006】 To briefly outline the technology described in Patent Document 1, as shown in Figure 11, the rim wire 800 is a thin wire with a constant cross-section, having an inner circumferential groove 810 on the lower side and an outer circumferential groove 820 on the upper side. The outer circumference of the lens is fitted into the lower inner circumferential groove 810 when it is rolled up to form a rim. The upper outer circumferential groove 820 is formed along the outer circumference when it becomes a rim. Here, the groove bottom 830 of the outer groove 820 is formed by repeatedly creating a certain pattern 840, 840... in a continuous manner. It is also possible to pour colorful resin into the outer groove 820 to form a resin layer. These features make it possible to create eyeglass frames with front designs that were previously unseen. 【0007】 On the other hand, Patent Document 2 is a utility model registration publication relating to eyeglasses with an improved method of surrounding the lens with a rim. Patent Document 2 discloses a paper laminate type eyeglass front frame in which the mounted lens is fixed to the inside of a rim formed by laminating paper, metal, and fiber material via a lens fixing bar material. 【0008】 To give an overview of the technology described in Patent Document 2, as shown in Figure 12, the rim 910 of the front frame 900 is constructed by bonding and laminating paper layers 930, 930 made of cardboard of a predetermined thickness to the front and back surfaces of a frame core material 920 made of a thin metal plate, and then laminating and bonding decorative sheet layers 940, 940 made of Japanese paper material that has been treated with a water-repellent agent to the outside of the paper layers. Furthermore, the lens fixing bar material 950 is detachably connected to the frame core material 920. This lens fixing bar material 950 has retaining parts 951 at both ends that can fasten the mounted lenses 960-960 in a two-point manner (a common term for the lens fixing method in rimless frames). In addition, the mounted lenses 960-960 are held in place by the upper and lower chords of the rim 910, which also serves to prevent the mounted lenses 960-960 from rotating. These features allow for the creation of paper-laminated eyeglass frames that possess the texture of fibrous material while improving design and comfort. [Prior art documents] [Patent Documents] 【0009】 [Patent Document 1] Japanese Patent Publication No. 2016-180923 [Patent Document 2] Utility Model Registration No. 3155270 Gazette [Overview of the project] [Problems that the invention aims to solve] 【0010】 However, the technology described in Patent Document 1 is based on a configuration in which the outer circumference of the lens is fitted and clamped into a groove on the inner circumference of the rim. Therefore, if the groove on the outer circumference is made deeper, for example, the rim becomes more prone to deformation and its strength decreases. In particular, in the case of a full-rim configuration, the lens needs to be firmly clamped by the rim in order to securely fix it, and the tension of the rim due to the clamping force places a large load on the outer circumference. Furthermore, if the grooves on the outer surface are deep, the neutral bending surface (the surface where neither tensile nor compressive stress acts due to bending) is closer to the center of the rim's cross-sectional shape. As a result, large tensile stress acts on the outer surface of the rim, making it more prone to problems such as rim fracture due to the force that clamps the lens, or cracks on the outer surface that may occur over time. Thus, the technology described in Patent Document 1 has the problem that the grooves on the outer surface must be very shallow, and the amount of colorful resin poured, as described in Patent Document 1, is limited to a small amount, thus limiting the effect of creating a unique appearance through grooves on the outer surface. 【0011】 On the other hand, the technology described in Patent Document 2, despite having a full-rim appearance, exhibits a distinctive appearance as a front frame by fixing the lens in the same way as a rimless frame. However, the technology in Patent Document 2 is formed by laminating materials formed by punching out the rim. Therefore, while the appearance in front view can be characterized by the characteristics of the laminated materials and the shape of the punching, the cross-sectional shape of the rim can only be a simple square or rectangle. Thus, the technology described in Patent Document 2 had the problem that the method of manufacturing the rim was limited, and there were also limitations on the extent to which the appearance could be improved. 【0012】 This invention has been made in view of the above-mentioned problems, and its objective is to provide eyeglass rims that have an elegant appearance by emphasizing the inner and outer surfaces by utilizing the cross-sectional shape of the rim. Furthermore, it aims to provide eyeglasses that have an elegant appearance and can prevent damage to the lenses and rims. [Means for solving the problem] 【0013】 The means employed by the inventors to solve the above problems are described below. The spectacle rim of the present invention (hereinafter simply referred to as "rim") is around the lens Leave a gapThese are wire-like components that are positioned. As mentioned above, the term "rim" generally refers to the edge portion used to secure the lens. However, the rim of this invention is not limited to those that directly contact and secure the lens; it also includes those that do not directly contact the lens but indirectly secure it through other parts. In addition to those positioned along the outer circumference of the lens, it also includes so-called brow bars that connect the left and right temples and suspend the lens. 【0014】 The rim of the present invention On the outer circumferential surface opposite to the lens side, a V-groove or U-groove is formed, and the rim The centroid of the cross-sectional shape is configured to be on the lens side of the center of the outermost shape of the cross-sectional shape. The cross-sectional shape referred to here is the shape that appears on the cut surface when the rim is cut in the direction of the normal to the inner or outer outline of the rim when viewed from the front when the rim is configured as eyeglasses. The center of the outermost shape refers to the position of the center of the square or rectangle that is tangent to the outermost shape in the up, down, left, and right directions of the cross-sectional shape when viewed from a direction perpendicular to the cut surface. Furthermore, the centroid is defined as the value obtained by dividing the first moment of area of ​​the figure by the area of ​​the figure. That is, assuming a rigid plate of uniform density with the planar shape of the figure, it refers to the position where the plate can be supported horizontally when supported at a single point on the plate. 【0015】 The position of the centroid of the cross-sectional shape is described in detail below. In the cross-sectional shape of a rim, shapes in which the centroid is located on the lens side include shapes in which the outer surface is more deeply recessed inward than the inner surface, and sharp shapes in which the outer surface protrudes. For example, in a shape in which the outer surface is more deeply recessed inward than the inner surface, the surface area of ​​the slope is larger compared to a shape with a shallow recess. Also, in sharp shapes in which the outer surface protrudes, the surface area of ​​the slope or protruding surface is larger compared to a low-height bulging shape. Thus, cross-sectional shapes in which the centroid is located on the lens side have a larger surface area of ​​the surfaces constituting the outer surface compared to the cross-sectional shape of a rim with a typical outer surface. 【0016】 When the surface area of the outer peripheral surface is large, when the glasses are viewed from the front direction or an oblique direction, a normal surface having a deeply recessed shape or a protruding sharp-shaped inclined surface, etc., which are the outer peripheral surfaces, are likely to enter the field of view. In addition, when secondary processing such as decoration or coloring is performed to impart design characteristics, the area of the decoration part, coloring part, etc. increases. As a result, the outer peripheral surface is easily visible, and the large surface area makes it easier to perform secondary processing to impart design characteristics. 。 【0017】 rim When adopting a form in which the outer peripheral surface of the lens is not sandwiched by the inner peripheral surface, the position of the centroid of the cross-sectional shape can also be set on the lens side by the shape characteristics of the inner peripheral surface of the following rim. The cross-sectional shape in which the position of the centroid is on the lens side includes a shape that is shallower and recessed inward than the outer peripheral surface, a flat or bulging shape protruding toward the lens side, etc. Therefore, the inner peripheral surface has a shape that is more likely to be exposed on the surface compared to a general rim that is deeply recessed for fitting the lens. In addition, when secondary processing such as decoration or coloring is performed to impart design characteristics, the decoration part, coloring part, etc. are more likely to be exposed on the surface. As a result, the inner peripheral surface is also easily visible, and the fact that the inner peripheral surface is not deeply recessed makes it easier to perform secondary processing to impart design characteristics such as printing or coloring. 。 【0018】 Among the means for solving the problems according to the present invention, those based on the basic configuration are as described above, but in the present invention, the following means can also be used. As an example of the cross-sectional shape, it is also possible to adopt a cross-sectional shape in which at least a part of the side on the lens side has a concave shape, and at least a part of the side on the side opposite to the lens side has a concave shape deeper than the concave shape. When there is a concave shape on the side on the lens side, the concave portion is easily visible through the end surface of the outer peripheral surface of the lens. In addition, by performing processing such as coloring on the concave portion, the coloring agent can be fixed in the concave surface, and the colored portion is easily visible through the end surface of the outer peripheral surface of the lens. 【0019】 Here, when the side opposite to the lens side of the cross-sectional shape has a concave shape deeper than the concave shape of the side on the lens side, the deep concave surface of the outer peripheral surface is likely to be visually recognized when worn as glasses. Also, when performing a treatment such as coloring on the concave portion, various secondary treatments for imparting design characteristics, such as forming multiple layers of a transparent coloring agent due to the deep concave surface, become possible. 【0020】 Also, at least a part of the side opposite to the lens side may have a V-groove, and the angle of the tip of the V-groove can be 90 degrees or more and 110 degrees or less. A general rim has a V-groove provided on its inner peripheral surface and fits with the outer peripheral surface of the triangular cross-section of the lens. Since the tip angles of the outer peripheral surface of the lens are generally angles such as 90 degrees, 100 degrees, 110 degrees, etc., the inner peripheral surface of the general rim has a V-groove of 90 degrees or more and 110 degrees or less. However, by deliberately providing a V-groove of an angle assumed for fitting this lens on the outer peripheral surface, a rim can be obtained that has an elegant appearance with the unexpectedness that the shape of this deep and wide V-groove is formed on an outer peripheral surface that is easily visually recognized as glasses. 【0021】 By the way, the rim of the present invention can also be made of metal as its entire material. The rim of the present invention can be made into glasses having an elegant appearance due to the cross-sectional shape, not limited to resin or metal, but composed of various materials. However, when made of metal, it can be rolled with a roller during so-called bending processing or coining processing to obtain a rim with a certain cross-sectional shape. Also, not only can a high-class feeling be imparted due to the unique texture of the metal, but various secondary treatments such as forming engraved patterns can also be adopted. 【0022】 On the other hand, in the glasses using the rim of the present invention, it is also possible to adopt a configuration in which the rim is arranged at least on the upper side or the lower side of the lens, and a gap is provided between the lens and the rim. Generally, when fitting lenses with a large curvature, so-called high-curve lenses, the rim must also be designed with a significantly deformed shape to match. Conversely, when fitting lenses with a small curve (high curvature, close to flat), the rim must also be designed to be flat to match. However, by creating a gap between the lens and the rim, the rim itself can be designed with a free curvature, regardless of the curve of the lens. 【0023】 Here, we will discuss the case where the centroid of the cross-sectional shape is located on the lens side, as in typical eyeglasses, where the lens is fixed by contacting the upper or lower side of the lens. In typical eyeglasses, the rim is taut when it holds the lens. This tension acts on the outer surface of the rim, creating a tensile load. In this case, if the centroid of the rim's cross-sectional shape is on the lens side (such as a cross-sectional shape where the outer surface is more deeply recessed inward than the inner surface, or a triangular cross-sectional shape that is convex on the outer surface), the cross-sectional area on the outer surface of the rim is smaller, resulting in greater tensile stress than on the inner surface. When tensile stress is present, temperature changes or slight deformation can easily cause plastic deformation exceeding the material's yield strength (elastic limit), reducing the fixing force that holds the lens in place and making the lens more prone to looseness and other problems. 【0024】 By the way, when forming by bending, problems specific to the processing method can sometimes arise. Bending is a process that plastically deforms a material. After bending, the material is in a state of residual strain. In other words, the deformation state is maintained by the remaining strain. When residual strain is present, even a small amount of further strain (deformation) applied after bending can cause the stress to reach the tensile strength, making fracture more likely. 【0025】 In addition, when forming by bending, tensile stress is generated on the outer surface and compressive stress on the inner surface, with the neutral plane (the plane passing through the centroid of the cross-sectional shape and parallel to the longitudinal direction of the rim) as the boundary. The maximum bending stress in this case occurs at the part furthest from the neutral plane. Therefore, if the centroid of the cross-sectional shape is on the lens side, the maximum bending stress acts as a tensile stress on the outer surface. Therefore, when the centroid of the cross-sectional shape is on the lens side, the tensile stress generated on the outer surface is large, and consequently, tensile stress tends to remain in the cross-section of the rim. 【0026】 In that case, if conventional eyeglasses use a cross-sectional shape where the centroid of the rim's cross-section is on the lens side, even slight distortion of the outer surface can lead to fracture due to the large tensile stress remaining after bending and the tensile stress caused by the tension on the rim when the lens is mounted. Furthermore, even if the stress does not reach the tensile strength, distortion can progress if a predetermined stress is constantly present. As distortion progresses, the fixing force holding the lens in place may decrease, potentially leading to problems such as the lens becoming loose. 【0027】 Thus, when fixing the lens by contacting the upper or lower side of the rim, as in typical eyeglasses, adopting a rim cross-sectional shape where the centroid is on the lens side makes it prone to various problems caused by tensile stress. 【0028】 In contrast, in the present invention, where a rim is positioned at least above or below the lens and a gap is provided between the lens and the rim, the lens is not clamped by the rim. Therefore, additional tensile stress is less likely to occur on the outer surface of the rim, and the possibility of the above-mentioned problems occurring can be reduced. 【0029】 In addition, the configuration, which includes a gap between the lens and the rim, reduces the load on the lens caused by the rim deforming due to the impact or load, even if the glasses are dropped or subjected to loads that compress the rim vertically. 【0030】 Furthermore, it is also possible to arrange the rim around the entire circumference of the lens with a gap between it and the lens, and to fix the portion of the rim near the bridge to the lens. When putting on eyeglasses, the temples are spread to the left and right. At this time, the rim deforms so that the end of the rim bends forward, using the bridge, which is located in the center of the eyeglasses, as the pivot point. If the lens and the end of the rim are fixed together at this time, the bridge portion of the lens will not deform much, while the end of the lens will try to deform forward. This makes the lens more prone to cracking. 【0031】 However, if the rim is fixed to the part near the bridge, even if the end of the rim bends forward when the temples are spread to the left and right, the lens itself will not deform because it is not fixed to the end of the rim. Therefore, damage to the lens when wearing the glasses can be prevented. 【0032】 Furthermore, it is also possible to provide a lens support means between the part of the rim closer to the bridge and the lens, thereby suppressing the rotation of the lens. Because the lens is supported by a lens support mechanism located between the bridge portion and the lens, even if the end of the rim bends forward when the temples are spread to the left and right as described above, the lens itself does not deform because it is not fixed to the end of the rim. Furthermore, if the lens is supported near the bridge, the end of the lens tends to rotate up and down, causing looseness. Therefore, by suppressing the rotation of the lens with a lens support mechanism provided near the bridge, it is possible to prevent the lens from coming into contact with the end of the rim and the lens, thus preventing looseness. 【0033】 In this case, the lens support means can be configured separately from the rim. When the lens support mechanism is formed as part of the rim, the rim itself must be manufactured by press forming, and the overall process becomes complicated when combined with the processing of the cross-sectional shape. However, by constructing the lens support mechanism as a separate component from the rim, the rim itself can be easily processed as a component with a fixed cross-sectional shape. Furthermore, since the mounting position of the lens support mechanism can be changed to the upper or lower side to match the shape of the lens, it is possible to change the shape of the lens and other components without changing the shape of the rim itself, thereby adding various arrangements to the appearance of the glasses when viewed from the front and providing a wide variety of glasses designs. [Effects of the Invention] 【0034】 In this invention, the centroid of the cross-sectional shape of the rim is configured to be closer to the lens than the center of the outermost part of that cross-sectional shape. As a result, when the glasses are worn, the shape of the outer surface itself and decorative parts such as engraved letters are more easily visible from the outside. Furthermore, the above configuration increases the surface area of ​​the surfaces constituting the outer periphery, making secondary processing to enhance the design easier. For example, in printing processes such as pad printing where a rubber pad is pressed against the surface, or paint application, the lack of deep indentations allows for more precise paint adhesion. Furthermore, when worn as eyeglasses, the inner surface of the rim becomes more easily visible from the outside. In addition, because the inner surface is not deeply recessed, secondary treatments to add design elements become easier, similar to the outer surface. These features have the effect of creating a beautiful appearance that emphasizes the inner and outer surfaces by taking advantage of the rim's cross-sectional shape. 【0035】 On the other hand, when the above-mentioned rim is constructed as eyeglasses, the rim and lens are spaced apart, allowing for eyeglasses with a freely adjustable curvature regardless of the type of lens fitted. In addition, it can prevent cosmetic defects that occur on the outer surface of the rim due to tensile stress. Furthermore, since the deformation of the rim does not directly affect the lens, the load on the lens caused by the deformation of the rim can be reduced. These features not only give the lens an elegant appearance but also help prevent damage to the lens and rim. [Brief explanation of the drawing] 【0036】 [Figure 1] These are a front view and an enlarged end view representing the rim of the eyeglasses of the present invention. [Figure 2] This is an explanatory diagram comparing the stress distribution when bending the spectacle rim of the present invention with that of a conventional spectacle rim. [Figure 3] These are a front view and a top view of eyeglasses using the eyeglass rim of the present invention. [Figure 4] This is a plan view showing the deformation state of each part when wearing eyeglasses using the eyeglass rim of the present invention. [Figure 5] This is an end view showing a modified example of the present invention. [Figure 6] These are a partial perspective view and an end view illustrating a modified example 2 of the present invention. [Figure 7] This is an end view showing a modified example 3 of the present invention. [Figure 8] This is an end view showing a reference example of the present invention. [Figure 9] A front view and a top view illustrating a modified example 4 of the present invention. [Figure 10] A front view and a top view illustrating a modified example 5 of the present invention. [Figure 11] This is a perspective view showing a conventional example of Patent Document 1. [Figure 12] These are a rear view and a partial top view illustrating a conventional example described in Patent Document 2. [Modes for carrying out the invention] 【0037】 Embodiments for carrying out the present invention will be described below with reference to Figures 1 to 4. In Figure 1, the direction normal to the outer shape of the rim and passing through the center of the shape on the front of the rim is denoted by symbol y, the direction perpendicular to the direction of symbol y is denoted by symbol x, and the directions perpendicular to the directions of symbols x and y are denoted by symbol z. Also, the position of the centroid of the cross-sectional shape indicated by symbol 6 is exaggeratedly spaced away from the center 5 of the figure for easier explanation. Therefore, the position of the centroid 6 shown in the figure is not necessarily the correct position. 【0038】 The spectacle rim 100 of the present invention (hereinafter referred to as "rim" as above) is formed into a ring shape by bending a wire-like rim wire 1 into a predetermined shape, as shown in Figure 1. This rim wire 1 is, for example, a rolled material of a ductile metal such as titanium, and is formed by bending processes such as bending using a roll or coining. The material of this rim wire 1 is not limited to metal; it may also be made of resin and formed into a closed ring shape. Furthermore, when using metal, in addition to titanium, ductile materials such as titanium alloys, stainless steel, and high-nickel alloys can be suitably used from the viewpoint of bendability. 【0039】 The ring shape is, for example, a shape that conforms to the shape of the lens that will be placed in the area enclosed by the rim 100. When the metal rim wire 1 is formed by bending, the ends that are cut after bending are joined together by a method such as brazing to form a closed ring shape. 【0040】 As shown in the enlarged end view of Figure 1, the cross-sectional shape of the rim 100, which consists of such rim line 1, has a V-groove 21 formed on the outer circumferential surface 2 side of the rim 100 and a flat portion 3 formed on the inner circumferential surface 3 side. This end view is an end view obtained by cutting the rim 1 through a line that is normal to the outer shape of the rim line 1 in the front view of Figure 1 and passes through the center of the shape on the front of the rim. 【0041】 The V-groove 21 on the outer peripheral surface 2 has a groove shape with a tip angle of 90 degrees on the inside, while leaving a small flat surface 22-22 at both ends. This shape, if originally formed on the inner peripheral surface 3, would allow the outer peripheral surface of a typical lens to fit, but in this invention, this shape is deliberately formed on the outer peripheral surface 2. Furthermore, the tip angle of the V-groove 21 can be selected from angles other than 90 degrees, such as 100 degrees or 110 degrees. These angles are commonly used for the outer surface of lenses. This allows for an appearance that is surprising because the V-groove 21, which at first glance appears to be fitted into the lens, is actually located on the outer surface 2. 【0042】 On the other hand, the inner circumferential surface 3 is mostly a flat portion 31 parallel to the direction of sign z, and the corners with the two side portions 4·4' are slightly rounded. The inner circumferential surface 3 can also be made into various other shapes, such as having multiple fine, shallow grooves or a convex, bulging shape. 【0043】 In this cross-sectional shape, the centroid 6 is closer to the lens (downward) than the center 5 of the rectangle that is tangent to the outermost part of the cross-sectional shape in the vertical (direction by sign y) and horizontal (direction by sign z) directions, respectively. Here, the rectangle is tangent to the planes 22·22 remaining at both ends of the outer peripheral surface 2, the two side portions 4·4', and the flat portion 31 of the inner peripheral surface 3. 【0044】 Next, the stress distribution in the cross-section of the rim wire 1 when it is formed by bending will be explained in comparison with a conventional general rim. Figure 2(a) is a schematic diagram of the rim wire 1 of the rim 100 of the present invention when it is bent so that the inner circumferential surface 3 having a flat portion 31 faces inward, as well as an arbitrary cross-sectional view and a diagram showing the tensile and compressive stress distributions. Figure 2(b) is a similar diagram of a general rim wire when it is bent. The difference with a general rim wire is that it is bent so that the inner circumferential surface where the V groove is formed faces inward. 【0045】 In general terms of stress distribution in bending, the stress is zero in the neutral plane (a plane parallel to the longitudinal direction passing through the centroid 6) because neither tension nor compression acts on it. Above the neutral plane, a tensile state occurs, and the tensile stress 71 caused by tension increases as you move away from the neutral plane. On the other hand, below the neutral plane, a compressive state occurs, and the compressive stress 72 caused by compression increases as you move away from the neutral plane. 【0046】 In this respect, as described above, the centroid 6 of the rim wire 1 of the present invention is located at a lower position, so the maximum value of the bending stress 7 occurs as a tensile stress 71 on the outer surface 2. On the other hand, in a typical rim wire, the centroid 6 is located at a higher position, so the maximum value of the bending stress 7 occurs as a compressive stress 72 on the inner surface 3. 【0047】 Thus, in conventional eyeglass rim wires, the concern about fracture due to tensile stress 71 is small. However, in the rim wire 1 of the present invention, the maximum bending stress occurs as tensile stress 71, so as mentioned above, concerns about various problems caused by tensile stress 71 must be taken into consideration. 【0048】 Therefore, in the eyeglasses 200 using the rim 100 of the present invention, as shown in Figure 3, the rim 100-100 is arranged around the entire outer circumference of the lenses 110-110, and a gap 170-170 is provided between the lenses 110-110 and the rim 100-100. 【0049】 To elaborate on the configuration of the eyeglasses 200 of the present invention, the rims 100-100 that surround the entire outer circumference of the lenses 110-110 are connected to each other by a bridge 120, and nose pads 130-130 using nose pads are attached to the lower ends of the bridge. Furthermore, endpieces 140-140 are joined to both ends of the rims 100-100 which are brazed into a ring shape, and temples 150-150 are rotatably provided to extend the endpieces 140-140. A gap 170-170 is provided at a constant interval between the lenses 110-110 and the rims 100-100, and the lenses 110-110 are fixed near the bridge 120. 【0050】 Lens fixing members 160-160, which are lens support means, are provided at the connection between the bridge 120 and the rims 100-100. These lens fixing members 160-160 are elongated vertically and have a roughly T-shape with their central portion protruding towards the lenses 110-110. The tip portion protruding towards the lenses 110-110 is screwed together with the lens fixing portions 111-111, which are openings in the lenses 110-110. Furthermore, the vertically extended portions of the lens fixing members 160-160 are inserted into the gaps 170-170. This prevents the lens ends 112-112 of the lenses 110-110 from rotating vertically with the lens fixing portions 111-111 as a fulcrum, thereby preventing rattling. 【0051】 Furthermore, in the configuration shown in Figure 3, the lens fixing members 160-160 are constructed as separate parts from the rims 100-100 and the bridge 120. While the lens fixing members 160-160 could be constructed integrally with the rims 100-100, in that case, the rims 100-100 would have to be constructed by press forming. This is possible if the cross-sectional shape is a separate process, but this would complicate the process. Therefore, by joining the lens fixing members 160-160 as separate parts from the rims 100-100 and the bridge 120, it becomes easier to achieve a consistent cross-sectional shape for the rims 100-100 by rolling. In addition, when manufacturing eyeglasses with a common rim wire 1 and modified lens shapes 110-110, only the lens fixing members 160-160 need to be changed, which simplifies inventory management and contributes to cost reduction. 【0052】 Next, the deformation state of each part when wearing these glasses 200 will be explained based on Figure 4. Figure 4(a) shows the temples 150-150 in the unfolded state. In this state, the distance between the temples 150-150 is set to be slightly narrower than the width of the wearer's head in order to fit snugly against it. Therefore, when wearing the eyeglasses 200, it is necessary to open the temples 150-150 further. 【0053】 When the temples 150-150 are opened to the left and right, as shown in Figure 4(b), the temples 150-150 themselves bend, and the rims 100-100 connected by the endpieces 140-140 also deform. That is, with the bridge 120 as the pivot point, the lens ends 112-112 deform so that they are displaced forward. 【0054】 In conventional rimless eyeglasses, the lens 110 is fixed to the frame with screws at two points: on the bridge 120 side and on the endpiece 140 side. With this fixing method, when the temples 150-150 are spread apart, the lens ends 112-112 are displaced forward, placing a significant load, especially on the screw portion on the endpiece 140 side. Therefore, with conventional rimless eyeglasses, depending on how the temples 150-150 are opened when the eyeglasses are worn, there is a risk of damaging the lens 110-110. 【0055】 However, in the eyeglasses 200 of the present invention, the lenses 110-110 and the rims 100-100 are fixed only at the lens fixing parts 111-111 on the bridge 120 side. Therefore, when the temples 150-150 are opened, as shown in Figure 4(b), the lenses 110-110 maintain their original position, while only the rims 100-100 deform, displacing the lens ends 112-112 forward. Thus, even when the temples 150-150 are opened, no large load is placed on the lenses 110-110, preventing damage to the lenses 110-110. 【0056】 Furthermore, even if weight is applied from above when the glasses 200 are placed with the temples 150-150 open, the gap 170-170 between the lenses 110-110 and the rims 100-100 prevents the bending of the rims 100-100 from being directly transmitted to the lenses 110-110. Therefore, the weight and impact can be buffered and the lenses 110-110 can be protected. 【0057】 Thus, the rim 100 of the present invention and the eyeglasses 200 using it have an elegant appearance that emphasizes the inner and outer surfaces by taking advantage of the cross-sectional shape of the rim 100, and can also prevent damage to the lenses 110, 110 and the rims 100, 100. 【0058】 "Differentiation Example 1" Next, modified examples of the spectacle rim of the present invention will be described with reference to Figure 5. The same reference numerals are used for identical parts, and redundant explanations will be omitted. In this modified example, the rim 100 has a V-groove 21 on its outer circumferential surface 2 and a plurality of shallow grooves 32, 32... on its inner circumferential surface 3. 【0059】 Thus, even if the inner surface 3 is not a flat surface, shallow grooves 32, 32... may be provided as long as the centroid 6 is on the lens side. In this case, when the eyeglasses 200 are assembled, the shallow grooves 32, 32... can be seen through the gap 170, 170. This results in a more aesthetically pleasing appearance compared to the case where the inner surface 3 is simply a flat surface. 【0060】 "Differentiation Example 2" On the inner circumferential surface 3, various shapes can be applied in addition to shallow grooves 3. As another modification of the spectacle rim of the present invention, as shown in Figure 6, it is also possible to apply an arbitrary engraved pattern 33 to the inner circumferential surface 3. This engraved pattern 33 is a concave shape consisting of extremely thin and shallow lines. 【0061】 The engraved pattern 33 can be formed by pressing the rim line 1 from above and below with a roll having a pattern of inverted engraved patterns 33, either as a pre-processing step before bending or simultaneously with bending. 【0062】 In this way, by applying an engraved pattern 33 to the inner circumference 3, the engraved pattern 33 can be seen through the gap 170-170 when the glasses 200 are assembled. This allows for an even more aesthetically pleasing appearance. The engraved pattern 33 can be applied not only to the inner circumference 3 but also to the outer circumference 2. 【0063】 Furthermore, in this modified example, a resin layer 23 is formed on the outer surface 2 by applying a colored resin, separate from the engraved pattern 33. The resin used in this process is an epoxy-based translucent resin, and depending on the degree of coloring, it will have a translucent, glass-like texture after heat curing. This also allows for an even more beautiful appearance. This coloring process can be applied not only to the outer surface 2 but also to the inner surface 3. 【0064】 "Differentiation Example 3" Another variation of the eyeglass rim of the present invention is to form a U-shaped groove 24 on the outer surface 2, as shown in Figure 7. The U-groove 24 is a shape that is used in some cases as the outer surface of the lens in general eyeglasses, and by deliberately forming it on the outer surface 2, an unexpected appearance can be achieved. Furthermore, the inner circumferential surface 3 of this modified example has a bulge 34 that protrudes toward the lens side. This further enhances the impression that the rim of a typical pair of eyeglasses has been inverted. 【0065】 Furthermore, in this modified example, side-colored sections 8,8 made of resin or paint are provided on both sides of the rim wire 1. By coloring the side sections, a beautiful appearance can be achieved even when viewed from the front while wearing the glasses. 【0066】 "Reference example" The spectacle rim of the present invention Reference example As shown in Figure 8, it is also possible to have a shape with a pointed portion 25 formed in a convex shape on the outer peripheral surface 2. In this case, the inner peripheral portion 3 may be a concave shape such as a V-groove or U-groove into which the outer peripheral surface of the lens fits, in addition to a flat shape. 【0067】 By making the outer circumference 2 convex and the inner circumference 3 flat 31, the strength of the rim 100 is improved. Furthermore, the convex shape of the outer circumferential surface 2 increases the exposed surface area of ​​the outer circumferential surface 2. When the inner circumferential portion 3 has a concave shape such as a V-groove or U-groove into which the outer circumferential surface of the lens fits, it takes the form of a conventional full-rim or half-rim. However, because the centroid 6 of the cross-sectional shape of the rim 100 is on the lens side, the shape of the outer circumferential surface 2 becomes more easily visible. These features improve visibility when the glasses 200 are worn in a frontal view, and allow for the creation of glasses 200 with a distinctive appearance that takes advantage of the cross-sectional shape. 【0068】 "Differentiation Example 4" Next, Figure 9 shows a modified example of eyeglasses using the spectacle rim of the present invention. In this modified example, the rims 100-100 are arranged to surround only the upper half of the lenses 110-110. At first glance, this modified example may look like a half-rim, but the lenses 110-110 are fixed only at the lens fixing parts 111-111 by lens fixing members 160-160 provided near the bridge 120. Therefore, resin threads such as nylon threads used in half-rims are not used. 【0069】 This configuration allows for eyeglasses that, at first glance, appear to be half-rimmed glasses, but utilize the cross-sectional shape of the rim 100-100 to emphasize the inner and outer surfaces, resulting in a beautiful appearance while also preventing damage to the lenses 110-110 and the rim 100-100. In addition, the rim 100-100 in this modified example can also be positioned below the lens 110-110, creating a so-called under-rim design. 【0070】 "Differentiation Example 5" In addition to the form shown in Figure 9, there are other modified forms of eyeglasses using the rim of the present invention, as shown in Figure 10. In this modified form, the rim 100 is configured like a single brow bar, and the lenses 110-110 are fixed by lens fixing members 160-160 that are suspended and fixed from near the bridge. 【0071】 Furthermore, this modified version uses lenses 110-110 as so-called high-curve lenses, allowing them to conform to the face and block sunlight from the sides, similar to sports sunglasses. 【0072】 This configuration allows for eyeglasses that, at first glance, resemble browline sunglasses, but by utilizing the cross-sectional shape of the rim 100-100 to emphasize the inner and outer surfaces, and while the lens 110-110 has a high curve, the rim 100 has a unique appearance that is close to straight. 【0073】 In this modified example, in addition to the pair of left and right lenses 110-110 as shown in Figure 10, a single lens configuration is also possible. In that case, the lens fixing member 160 is positioned to suspend the lens 110 from the rim 100. 【0074】 As described above, the present invention makes it possible to provide eyeglass rims with an elegant appearance that emphasizes the inner and outer surfaces by utilizing the cross-sectional shape of the rim. Furthermore, it is possible to provide eyeglasses that have an elegant appearance and can prevent damage to the lenses and rims. [Explanation of Symbols] 【0075】 100 eyeglass rims 1 Rim wire 2 Outer surface 21 V groove 22 plane 23 Resin layer 24 U-grooves 25. Cutting edge 3 Inner surface 31 Flat area 32 shallow grooves 33 Sculptural Patterns 34 Bulge 4 Side part 5 center 6. Center of gravity 7. Bending stress 71 Tensile stress 72 Compressive stress 8 Side coloring section 200 glasses 110 Lens 111 Lens fixing part 112 Lens end 120 Bridge 130 Nose pad 140 Wisdom 150 Temple 160 Lens fixing member 170 Gap

Claims

[Claim 1] In eyeglass rims positioned around the lens, A V-groove or U-groove is formed on the outer circumferential surface opposite to the lens side. An eyeglass rim characterized in that the position of the centroid of the cross-sectional shape that appears when the outer or inner rim of the eyeglass rim is cut in the direction normal to the ridge is closer to the lens than the position of the center of the square or rectangle that is tangent to the outermost shape in the up, down, left, and right directions of the said cross-sectional shape. [Claim 2] The spectacle rim according to claim 1, characterized in that at least a portion of the lens-side edge of the cross-sectional shape has a concave shape, and at least a portion of the edge opposite the lens-side has a concave shape that is deeper than the concave shape. [Claim 3] The spectacle rim according to claim 1 or 2, characterized in that at least a portion of the side opposite to the lens side has a V-groove, and the angle of the tip of the V-groove is 90 degrees or more and 110 degrees or less. [Claim 4] A spectacle rim according to any one of claims 1 to 3, characterized in that the entire rim is made of metal. [Claim 5] In eyeglasses using an eyeglass rim as described in any one of claims 1 to 4, The aforementioned spectacle rim is positioned at least above or below the lens. Eyeglasses characterized in that a gap is provided between the lens and the rim for the eyeglasses. [Claim 6] The eyeglasses according to claim 5, characterized in that the eyeglass rim is arranged around the entire circumference of the lens with a gap between it and the lens, and the portion of the eyeglass rim closer to the bridge portion is fixed to the lens. [Claim 7] A lens support means is provided between the portion of the eyeglass rim near the bridge and the lens. The eyeglasses according to claim 5 or 6, characterized in that the rotation of the lens is suppressed by the lens support means. [Claim 8] The eyeglasses according to claim 7, characterized in that the lens support means is configured separately from the eyeglass rim and is fixed to the eyeglass rim and the lens, respectively.

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