Spectacle frame

Abstract

The present invention improves safety of a wearer and performance of preventing breakage of a spectacle frame.　This spectacle frame includes: a pair of rims 11R and 11L for fixing lenses LR and LL; a bridge 12 for connecting the pair of rims; and temples 14R and 14L respectively connected to the rims 11R and 11L via endpieces 13R and 13L. The spectacle frame 1 is composed of an outer frame part and an inner frame part which is softer than the outer frame part and is provided on at least a part of the inner side of the outer frame part. The inner frame part includes temple inner frame parts 14RI and 14LI provided on the inner side of the temples of the outer frame part.

Description

eyeglass frames

[0001] The present invention relates to eyeglass frames.

[0002] Conventionally, there have been technologies that aim to improve the safety of the wearer and prevent damage to the eyeglass frame when an external force such as an impact acts on the eyeglass frame due to exercise, etc. (see, for example, Patent Document 1).

[0003] Japanese Patent Application Laid-Open No. 2023-157908

[0004] However, there has been a demand for further improvements in terms of safety for the wearer and prevention of breakage of the eyeglass frames.

[0005] The present invention has been made in view of the above circumstances, and aims to improve the safety of the wearer and the ability to prevent damage to the eyeglass frame.

[0006] In order to achieve the above object, one aspect of the present invention provides an eyeglass frame having a pair of rims for fixing lenses, a bridge connecting the pair of rims, and temples connected to the rims via end pieces, wherein the eyeglass frame is composed of an outer shell portion and an inner shell portion that is softer in hardness than the outer shell portion and is provided on at least a portion of the inside of the outer shell portion, and the inner shell portion includes temple inner shell portions that are provided on the inside of the temples of the outer shell portion.

[0007] According to the present invention, it is possible to improve the safety of the wearer and the ability to prevent damage to the eyeglass frame.

[0008] 1 is a perspective view showing an overall view of eyeglasses to which an eyeglass frame according to an embodiment of the present invention is applied. 2 is a perspective view showing an overall view of eyeglasses to which an eyeglass frame according to an embodiment of the present invention is applied, shown from a different direction than FIG. 1. 3 is a front view of the eyeglasses shown in FIGS. 1 and 2. 4 is a plan view of the eyeglasses shown in FIGS. 1 and 2. 5 is a reference view showing further cross sections and symbols in the plan view of the eyeglasses shown in FIG. 4. 6 is a bottom view of the eyeglasses shown in FIGS. 1 and 2. 7 is a left side view of the eyeglasses shown in FIGS. 1 and 2. 8 is a back view of the eyeglasses shown in FIGS. 1 and 2. 9 is a combined cross-sectional view of the eyeglasses shown in FIG. 4 along line A-B-C-D. 10 is a cross-sectional view of the eyeglasses shown in FIG. 5 along line E-E. 11 is a cross-sectional view of the eyeglasses shown in FIG. 5 along line F-F. 12 is a cross-sectional view of the eyeglasses shown in FIG. 7 along line G-G.

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. First, an overall view of eyeglasses to which an eyeglass frame according to an embodiment of the present invention is applied will be described with reference to Figs. 1 and 2.

[0010] In the description of the eyeglass frames according to the embodiments of the present invention, unless otherwise specified, the following directions are used: a three-dimensional Cartesian coordinate system consisting of the following axes X, Y, and Z.

[0011] When the eyeglass frames are worn by a wearer facing directly, the axis X is taken as the left-right direction for the wearer. The direction that is to the left for the wearer is called the "positive axis X direction," and the opposite direction is called the "negative axis X direction." The axis Y is taken as the front-to-back direction for the wearer. The direction that is to the front for the wearer is called the "negative axis Y direction," and the opposite direction is called the "positive axis Y direction." The axis Z is taken as the up-to-down direction for the wearer, i.e., the direction in which gravity acts. The direction opposite to the direction in which gravity acts (upward) is called the "positive axis Z direction," and the opposite direction (downward) is called the "negative axis Z direction."

[0012] Additionally, the negative direction of the Y axis will be referred to as the "front side," the positive direction of the Y axis as the "rear side," the positive direction of the Z axis as the "upper side," and the negative direction of the Z axis as the "lower side." Additionally, in the X-Y plane, the direction away from the wearer's head will be referred to as the "outer side," and the opposite direction will be referred to as the "inner side."

[0013] The eyeglass frame of this embodiment has a shape that is symmetrical in the direction of the axis X with respect to the Y-Z plane. Therefore, in the following description, the parts that make up the eyeglasses and are provided on the left and right sides of the wearer will be described with the symbol L attached to the part that is on the left side of the wearer and the symbol R attached to the part that is on the right side of the wearer.

[0014] <Overall Image> Fig. 1 is a perspective view showing an overall image of eyeglasses to which an eyeglass frame according to an embodiment of the present invention is applied. Fig. 2 is a perspective view showing an overall image of eyeglasses to which an eyeglass frame according to an embodiment of the present invention is applied, shown from a different direction than Fig. 1.

[0015] The eyeglass frame 1 has rims 11R and 11L, a bridge 12, end pieces 13R and 13L, and temples 14R and 14L.

[0016] The eyeglass frame 1 of this embodiment is integrally molded using a thermoplastic resin elastomer (TPE). That is, the rims 11R and 11L, the bridge 12, the end pieces 13R and 13L, and the temples 14R and 14L are integrally and inseparably formed. For ease of explanation, the eyeglass frame, which is integrally formed, will be described below as being divided into the individual parts of the rims 11R and 11L, the bridge 12, the end pieces 13R and 13L, and the temples 14R and 14L. Furthermore, in each drawing, auxiliary lines separating each part are indicated by symbols beginning with "S."

[0017] The eyeglass frame 1 of this embodiment is integrally molded simultaneously using double injection molding with two thermoplastic resin rubber elastic bodies of different hardness. As will be described in detail later, the outer shell of the eyeglass frame 1 is molded from a hard thermoplastic resin rubber elastic body. The inner shell of the eyeglass frame 1 is molded from a softer thermoplastic resin rubber elastic body than the outer shell. That is, the outer and inner shells are integrally molded using two thermoplastic resin rubber elastic bodies of different hardness. As such, the eyeglass frame 1 does not contain any metal. This improves the safety of the wearer and the like. In this embodiment, the outer shell of the eyeglass frame 1 includes rim outer shells 11RO, 11LO, bridge outer shell 12O, end pieces 13R, 13L, and temple outer shells 14RO, 14LO. The inner shell of the eyeglass frame 1 includes rim inner shells 11RI, 11LI, bridge inner shell 12I, and temple inner shells 14RI, 14LI.

[0018] In the following description, the outer shell portion, which is molded from a hard thermoplastic resin rubber elastomer, will be denoted by the symbol O in addition to the symbol of each part, and the inner shell portion, which is molded from a softer thermoplastic resin rubber elastomer than the outer corner portion, will be denoted by the symbol I in addition to the symbol of each part.

[0019] The rims 11R and 11L are parts of the eyeglass frame 1 that surround and fix the lenses LR and LL, respectively.

[0020] The rim 11R is composed of an inner rim portion 11RI and an outer rim portion 11RO. The rim 11L is composed of an inner rim portion 11LI and an outer rim portion 11LO. As shown in FIG. 1 , the inner rim portions 11RI and 11LI have multiple bottomed holes. The specific structures of the inner rim portions 11RI and 11LI and the outer rim portions 11RO and 11LO of the rims 11R and 11L, as well as the benefits of having such structures, will be described later. Note that hereinafter, when there is no need to distinguish between the rims 11R and 11L individually, they will be collectively referred to as the "rim 11."

[0021] The bridge 12 connects the pair of rims 11R and 11L. The bridge 12 is connected to the rim 11R via the point indicated by auxiliary line S1 and to the rim 11L via the point indicated by auxiliary line S4, thereby connecting the pair of rims 11R and 11L.

[0022] The bridge 12 is composed of a bridge inner portion 12I and a bridge outer portion 12O. As shown in Fig. 1, the bridge inner portion 12I has a plurality of holes or a plurality of bottomed holes that penetrate in the vertical direction. The specific structures of the bridge inner portion 12I and the bridge outer portion 12O of the bridge 12 and the advantages of having such structures will be described later.

[0023] The end pieces 13R and 13L connect the rims 11R and 11L to the temples 14R and 14L, respectively, as described below. The end piece 13R is connected to the rim 11R via the location indicated by auxiliary line S2, and to the temple 14R via the location indicated by auxiliary line S3, thereby connecting the rim 11R and the temple 14R. The end piece 13L is connected to the rim 11L via the location indicated by auxiliary line S5, and to the temple 14L via the location indicated by auxiliary line S6, thereby connecting the rim 11L and the temple 14L.

[0024] Furthermore, the end pieces 13R and 13L each have a recess 13R-C or 13L-C that is recessed from the outside to the inside of the eyeglass frame. By having the recess 13R-C or 13L-C, the end pieces 13R and 13L each flexibly deform and do not crack, regardless of whether they are deformed in the direction of closing the temple 14 (the direction in which the ends in the positive direction of the axis Y come into contact with each other) or in the direction of opening the temple 14 (the direction in which the ends in the positive direction of the axis Y move apart). Note that hereinafter, when there is no need to distinguish between the end pieces 13R and 13L individually, they will be collectively referred to as "end piece 13."

[0025] The temples 14R and 14L are connected to the rims 11R and 11L, respectively, via the end pieces 13R and 13L. The temple 14R is connected to the end piece 13R at the location indicated by auxiliary line S3, and the end piece 13R is connected to the rim 11R at the location indicated by auxiliary line S2. The temple 14L is connected to the end piece 13L at the location indicated by auxiliary line S6, and the end piece 13L is connected to the rim 11L at the location indicated by auxiliary line S5.

[0026] The temple 14R is composed of a temple inner portion 14RI and a temple outer portion 14RO. The temple 14L is composed of a temple inner portion 14LI and a temple outer portion 14LO. As shown in FIG. 1 , the temple inner portions 14RI and 14LI have a plurality of holes or a plurality of bottomed holes penetrating in the vertical direction. The specific structures of the temple inner portions 14RI and 14LI and the temple outer portions 14RO and 14LO of the temples 14R and 14L, and the advantages of having such structures, will be described later. Hereinafter, when there is no need to distinguish between the temples 14R and 14L individually, they will be collectively referred to as "temples 14."

[0027] The overall image of the eyeglasses to which the eyeglass frame 1 according to the embodiment of the present invention is applied has been described above using FIGS.

[0028] <Detailed Structure> Hereinafter, a detailed structure of eyeglasses to which the eyeglass frame 1 according to the embodiment of the present invention is applied will be described with reference to FIGS. 3 to 7 in addition to FIGS. 1 and 2. FIG.

[0029] Fig. 3 is a front view of the glasses shown in Figs. 1 and 2. Fig. 4 is a plan view of the glasses shown in Figs. 1 and 2. Fig. 5 is a reference diagram showing further cross sections and symbols in the plan view of the glasses shown in Fig. 4. Fig. 6 is a bottom view of the glasses shown in Figs. 1 and 2. Fig. 7 is a left side view of the glasses shown in Figs. 1 and 2. Fig. 8 is a back view of the glasses shown in Figs. 1 and 2. The right side view is omitted because it is symmetrical to the left side view.

[0030] As shown in FIGS. 1 and 2, the rim inner portions 11RI, 11LI of the rim 11 have holes with bottoms that are recessed upward or downward (hereinafter referred to as bottomed holes).

[0031] Specifically, for example, the upper edge side 11RI-ST of the rim inner portion 11RI of the rim 11R has a plurality of bottomed holes recessed from top to bottom along the left-right direction (X direction). Similarly, the upper edge side 11LI-ST of the rim inner portion 11LI of the rim 11L has a plurality of bottomed holes recessed from top to bottom along the left-right direction. Here, the upper edge sides 11RI-ST and 11LI-ST of the rim inner portions 11RI and 11LI refer to the edge parts of the rims 11R and 11L, respectively, that are on the positive side of the Z axis.

[0032] Furthermore, the lower edge side 11RI-SB of the rim inner portion 11RI of the rim 11R has a plurality of bottomed holes recessed from bottom to top along the left-right direction (axis X direction). Similarly, the lower edge side 11LI-SB of the rim inner portion 11LI of the rim 11L has a plurality of bottomed holes recessed from bottom to top along the left-right direction. Here, the lower edge sides 11RI-SB and 11LI-SB of the rim inner portions 11RI and 11LI refer to the edge parts on the negative side of the axis Z of the rims 11R and 11L, respectively.

[0033] Furthermore, a plurality of holes are formed in the upper surface 12I-ST of the bridge inner portion 12I of the bridge 12, penetrating in the vertical direction.

[0034] Furthermore, a plurality of holes penetrating in the vertical direction are formed in the temple inner portion 14RI of the temple 14R along the longitudinal direction of the temple 14R. Similarly, a plurality of holes penetrating in the vertical direction are formed in the temple inner portion 14LI of the temple 14L along the longitudinal direction of the temple 14L. Here, the longitudinal direction of the temple inner portions 14RI and 14LI refers to the direction of the approximate axis Y of the temples 14R and 14L, respectively.

[0035] Here, the structure of the plurality of holes that penetrate the temple 14 in the vertical direction and the advantages of having this structure will be described.

[0036] As shown in FIGS. 1 to 4 , the temple inner portion 14RI of the temple 14R has an upper surface 14RI-ST, an inner surface 14RI-SI, and a lower surface 14RI-SB. The upper surface 14RI-ST and the lower surface 14RI-SB are smoothly connected as a single surface at the end of the temple 14R in the positive direction of the axial Y (the +Y side end). Similarly, the temple inner portion 14LI of the temple 14L has an upper surface 14LI-ST, an inner surface 14LI-SI, and a lower surface 14LI-SB. The upper surface 14LI-ST and the lower surface 14LI-SB are smoothly connected as a single surface at the end of the temple 14L in the positive direction of the axial Y (the +Y side end).

[0037] 1 and 2, the temple inner portion 14RI has a plurality of holes formed along the longitudinal direction of the temple 14R, penetrating from the upper surface 14RI-ST to the lower surface 14RI-SB of the temple inner portion 14RI. Similarly, the temple inner portion 14LI has a plurality of holes formed along the longitudinal direction of the temple 14R, penetrating from the upper surface 14RI-ST to the lower surface 14RI-SB of the temple inner portion 14RI.

[0038] 5, adjacent holes in the temple inner portion 14RI are each separated by a respective wall 14RI-W1 to 14RI-W6. Each of the walls 14RI-W1 to 14RI-W6 is inclined from the front (-Y side) to the rear (+Y side) as it moves from the outside to the inside of the eyeglass frame 1. Hereinafter, when it is not necessary to distinguish between the walls 14RI-W1 to 14RI-W6, they will be collectively referred to as the "wall 14RI-W." Similarly, adjacent holes in the temple inner portion 14LI are each separated by a respective wall 14LI-W1 to 14LI-W6. Each of the walls 14LI-W1 to 14LI-W6 is inclined from the front (-Y side) to the rear (+Y side) as it moves from the outside to the inside of the eyeglass frame 1. Note that hereinafter, when there is no need to distinguish between the walls 14LI-W1 to 14LI-W6 individually, they will be collectively referred to as "walls 14LI-W."

[0039] Here, for example, suppose an impact is applied to the temple 14R, such as when a predetermined object collides with the temple 14R from the negative direction of the axis X toward the positive direction of the axis X. In this case, the temple 14R of the eyeglass frame 1 is deformed. Specifically, for example, the inner surface 14RI-SI of the temple inner portion 14RI first comes into contact with the wearer. As described above, the temple inner portion 14R is formed of a thermoplastic resin rubber elastic body that is softer than the outer portion. Therefore, after coming into contact with the wearer, the temple inner portion 14RI deforms first compared to the temple outer portion 14RO. Furthermore, since the temple inner portion 14RI has multiple holes formed therein as described above, deformation (crushing) of the multiple holes makes it easier to deform. This reduces the impact due to the temple inner portion 14RI, improving the safety of the wearer.

[0040] Furthermore, the inner surface 14RI-SI of the temple inner portion 14RI generates a frictional force against the wearer after coming into contact with the wearer. Furthermore, the wall portion 14RI-W, which slopes from front to rear as it moves from the outside to the inside of the eyeglass frame 1, deforms so that the temple 14R moves in the negative direction of the axis Y relative to the inner surface 14RI-SI of the temple inner portion 14RI. This prevents the rim 11R or lens LR from coming into contact with the wearer, or, if they do come into contact, reduces the force pressing against the wearer, thereby improving the safety of the wearer.

[0041] Furthermore, when the wall portions 14RI-W, which are inclined from the front to the rear, deform, two or more wall portions 14RI-W overlap in the axial X direction. As a result, the thickness of the wall portions 14RI-W in the axial X direction is the sum of the thicknesses of the overlapping wall portions 14R. In other words, the temple inner shell portion 14RI, which is made of a thermoplastic resin rubber elastic body that is softer than the outer shell portion, has room to deform by the sum of the thicknesses of the overlapping wall portions 14RI-W. Throughout the entire range having multiple holes penetrating in the vertical direction, the wall portions 14RI-W can have a region where they overlap substantially uniformly when deformed. This improves the safety of the wearer.

[0042] Furthermore, when the temples 14 are deformed in the opening direction (the direction separating the ends in the positive direction of the axis Y), a restoring force acts in the long side direction of the wall portion 14RI-W in the XY plane. This makes it easier for the eyeglass frame 1 to return to its normal shape. In other words, since the eyeglass frame 1 can more easily return to its normal shape, the wearing comfort is improved, and since the eyeglass frame 1 can more easily return to its normal shape even after repeated deformation, the lifespan of the eyeglass frame 1 is improved. The same applies when an impact is applied to the temple 14L.

[0043] Furthermore, the multiple holes penetrating in the vertical direction are provided in non-contact areas of the temple inner shells 14RI, 14LI that do not come into contact with the head of a wearer wearing the eyeglass frames. The non-contact area refers to an area that does not come into contact with the wearer under normal circumstances, and more specifically, refers to an area excluding the rear end (+Y side end) of the temple that comes into contact with the wearer's head or ears when the wearer wears the eyeglass frames. As described above, the multiple holes penetrating in the vertical direction are located so as to pass through the upper surface 14RI-ST and the lower surface 14RI-SB of the temple inner shell 14RI. Specifically, for example, the multiple holes penetrating in the vertical direction do not have a structure on the inner surface 14RI-SI of the temple inner shell 14RI that comes into contact with the wearer's head. This prevents the wearer from coming into contact with unevenness or the like caused by the multiple holes penetrating in the vertical direction, resulting in a comfortable fit without any discomfort, i.e., an improved fit.

[0044] Furthermore, in the vicinity of the multiple holes in the temple inner portion 14RI of the temple 14R, the length of the inner surface 14RI-SI is longer in the approximate direction of axis Y than the length of the surface that contacts the temple outer portion 14RO in the approximate direction of axis Y. This allows the temple 14 to flexibly deform even when deformed in the direction opening (direction separating the ends in the positive direction of axis Y), reducing the risk of cracks or the like.

[0045] The specific structure of the multiple holes that penetrate the temple 14 in the vertical direction and the advantages of having that structure have been described above, mainly using temple 14R. As shown in Figure 5 and other figures, temple 14L has a structure that is basically the same as temple 14R, and has advantages that come from having that structure.

[0046] Next, the structure of the multiple bottomed holes of the rim 11R and the advantages of having this structure will be described using the rim 11R.

[0047] Similarly to the temple inner portions 14RI, the adjacent holes in the rim inner portion 11RI are each separated by a wall portion 11RI-W. Each of the walls 11RI-W of the rim inner portion 11RI is inclined from the bridge 12 side to the end piece 13R side as it extends from the outside to the inside of the eyeglass frame 1.

[0048] Here, for example, suppose an impact is applied to the rim inner portion 11RI by, for example, a predetermined object colliding with the rim inner portion 11RI from the negative direction of the axis Y toward the positive direction of the axis Y. In this case, the rim 11R of the eyeglass frame 1 is deformed. Specifically, for example, the inner surface of the rim inner portion 11RI comes into contact with the wearer. As described above, the rim inner portion 11RI is formed of a thermoplastic resin rubber elastic body that is softer than the rim outer portion 11RO. Therefore, the rim inner portion 11RI deforms first compared to the rim outer portion 11RO. Furthermore, since the rim inner portion 11RI has multiple bottomed holes formed therein as described above, it deforms more easily as the multiple bottomed holes deform (collapse). This reduces the impact due to the rim inner portion 11RI, improving the safety of the wearer.

[0049] Furthermore, after coming into contact with the wearer, the inner surface of the rim inner portion 11RI generates a frictional force against the wearer. Furthermore, the wall portion 12O-W, which slopes from the bridge 12 side toward the endpiece 13R side as it moves from the outside to the inside of the eyeglass frame 1, deforms relative to the inner surface of the rim inner portion 11RI, causing the rim 11R to move in the positive direction of the axis X. The positive direction of the axis X, for example, is the direction away from the wearer's right eye in the nose pad portion of the rim 11R. This prevents the nose pad portion of the rim 11R from coming into contact with the wearer (especially the right eye), or, if it does come into contact, reduces the force pressing against the wearer, improving the wearer's safety.

[0050] Furthermore, when the wall portions 11RI-W of the rim inner shell portion 11RI are deformed, two or more wall portions 11RI-W overlap in the axial Y direction. As a result, the thickness of the wall portions in the axial Y direction is the sum of the thicknesses of the overlapping wall portions 11RI-W. In other words, the rim inner shell portion 11RI, which is made of a thermoplastic resin rubber elastic body that is softer than the outer shell portion, has room to deform by the sum of the thicknesses of the overlapping wall portions 11RI-W. Throughout the entire range having multiple bottomed holes, the wall portions 11RI-W can have an area where they overlap approximately uniformly when deformed. This improves the safety of the wearer.

[0051] Furthermore, as described above, when the temples 14 are deformed in the closing direction (the direction in which the ends in the positive direction of the axis Y come into contact with each other) or in the opening direction (the direction in which the ends in the positive direction of the axis Y move apart), the recesses 13R-C and 13L-C of the end pieces 13R and 13L, respectively, allow the temples 14 to deform flexibly and do not crack. However, when the rim 11 is also deformed, a restoring force acts in the long side direction of the wall portion 11RI-W. This makes it easier for the eyeglass frame 1 to return to its normal shape. In other words, since the eyeglass frame 1 can more easily return to its normal shape, the wearing comfort is improved, and since the eyeglass frame 1 can more easily return to its normal shape even after repeated deformation, the eyeglass frame 1's lifespan is improved.

[0052] The specific structure of the multiple bottomed holes in the rim 11 and the benefits of having that structure have been described above using the rim 11R. As shown in Figure 5 and other figures, the rim 11L has a structure that is basically the same as the rim 11R, and has the benefits of having that structure.

[0053] Next, the structure of the holes that penetrate the bridge 12 in the vertical direction and the advantages of having this structure will be described.

[0054] The holes penetrating the bridge inner portion 12I in the vertical direction are formed alongside the bottomed holes provided in the rim inner portions 11RI, 11LI adjacent to the bridge inner portion 12I, and are separated by a wall portion 120-W. The wall portion 120-W forming the holes in the bridge inner portion 12I is inclined from the center of the bridge 12 toward the end piece 13 as it goes from the outside to the inside of the eyeglass frame 1.

[0055] For example, suppose a predetermined object collides with the bridge inner portion 12I from the negative direction of the Y axis toward the positive direction of the Y axis. In this case, the bridge 12 of the eyeglass frame 1 deforms together with the rims 11R, 11L, etc. Specifically, for example, the inner surface of the bridge inner portion 12I comes into contact with the wearer. As described above, the bridge inner portion 12I is formed of a thermoplastic resin rubber elastic body that is softer than the outer portion. Therefore, the bridge inner portion 12I deforms first compared to the bridge outer portion 12O. Furthermore, since the bridge inner portion 12I has a through-hole formed therein in the vertical direction as described above, deformation (crushing) of the through-hole facilitates deformation. This allows the bridge inner portion 12I to reduce impact (especially impact from the front of the wearer) and improve the safety of the wearer.

[0056] Furthermore, when the wall 120-W of the bridge inner portion 12I deforms, it overlaps in the axial Y direction with the wall 11RI-W of the multiple bottomed holes of the adjacent rim inner portions 11RI, 11RI. As a result, the thickness of the wall in the axial Y direction is the sum of the thicknesses of the overlapping wall 11RI-W and 120-W. In other words, the bridge inner portion 12I, which is made of a thermoplastic resin rubber elastic body that is softer than the outer portion, has room to deform by the sum of the thicknesses of the overlapping wall portions. Throughout the entire range having holes penetrating in the vertical direction, the wall can have an area where it overlaps approximately uniformly when deformed. This improves the safety of the wearer.

[0057] The specific structure of the holes that penetrate the bridge 12 in the vertical direction and the advantages of having such a structure have been described above.

[0058] <Shapes of holes penetrating in the vertical direction and holes with a bottom> Hereinafter, the shapes of the holes penetrating in the vertical direction or holes with a bottom will be described with reference to Figs. 9 to 12 .

[0059] Figure 9 is a cross-sectional view of the eyeglasses shown in Figure 4 taken along line A-B-C-D. As shown in Figure 9, the hole provided in the upper edge side 11RI-ST of the rim inner section 11RI of the rim 11R has a bottom 11RI-B. This prevents deformation of not only the wall 11RI-W of the upper edge side 11RI-ST of the rim inner section 11RI of the rim 11R, but also the bottom 11RI-B, in response to forces in the X-Y plane. As a result, deformation of the rim inner section 11RI, and therefore of the rim 11R, in response to minor forces (such as inertial forces associated with the wearer's movement) is minor, improving wearing comfort. Furthermore, the hole on the upper edge side 11RI-ST (positive side of the axis Z) of the rim inner portion 11RI of the rim 11R is a bottomed hole recessed from the top side of the upper edge side 11RI-ST downward, with a bottom (bottom 11RI-B) formed on the bottom side (negative side of the axis Z). This makes the multiple bottomed holes visible from the positive direction of the axis Z when worn. This improves the design of the eyeglass frame 1 while providing the aforementioned benefits of improved wearing comfort. Furthermore, by making the hole on the upper edge side 11RI-ST (positive side of the axis Z) recessed from the top side of the upper edge side 11RI-ST downward, it becomes easier to demold the eyeglass frame 1 when creating it using upper and lower molds, making it easier to manufacture the eyeglass frame. Furthermore, it is possible to reduce the weight of the rim inner portion and reduce the amount of material used for the rim inner portion, contributing to cost reductions. As shown in FIG. 9 and other figures, the rim 11L has a structure basically similar to that of the rim 11R, and there are advantages to having this structure.

[0060] Figure 10 is a cross-sectional view of the eyeglasses shown in Figure 5 taken along line E-E. As shown in Figure 10, the hole provided on the lower edge side 11RI-SB of the rim inner frame 11RI of the rim 11R has a bottom 11RI-B. This prevents deformation of not only the wall 11RI-W of the lower edge side 11RI-SB of the rim inner frame 11RI of the rim 11R, but also the bottom 11RI-B, in response to forces in the X-Y plane. As a result, deformation of the rim inner frame 11RI, and therefore of the rim 11R, in response to minor forces (for example, inertial forces associated with the wearer's movement) is minor, improving the wearing comfort. Furthermore, the hole on the lower edge side 11RI-SB (negative side of the axis Z) of the rim inner portion 11RI of the rim 11R is a bottomed hole recessed from the lower side of the lower edge side 11RI-SB to the upper side, with a bottom (bottom 11RI-B) formed on the upper side (positive side of the axis Z). This makes the multiple bottomed holes visible from the negative direction of the axis Z when worn. This improves the design of the eyeglass frame 1 while providing the benefit of the improved wearing comfort described above. Furthermore, by making the hole on the lower edge side 11RI-SB (negative side of the axis Z) recessed from the lower side of the lower edge side 11RI-SB to the upper side, it becomes easier to demold the eyeglass frame 1 when creating it using upper and lower molds, which also has the effect of making the eyeglass frame easier to manufacture. Furthermore, this reduces the weight of the rim inner portion and reduces the amount of material used for the rim inner portion, contributing to cost reductions. As shown in FIG. 10 and other figures, the rim 11L has a structure basically similar to that of the rim 11R, and there are advantages to having this structure.

[0061] FIG. 11 is a cross-sectional view of the eyeglasses shown in FIG. 5 taken along line F-F. FIG. 12 is a cross-sectional view of the eyeglasses shown in FIG. 7 taken along line G-G. As shown in FIGS. 11 and 12, the holes provided in the temple inner portion 14RI of the temple 14R are holes that penetrate in the vertical direction. This not only reduces the weight of the temple inner portion, but also reduces the amount of material used for the temple inner portion, contributing to cost reduction. Furthermore, in the temple 14R that comes into contact with the wearer's temporal region, sebum and other dirt are likely to accumulate in the holes. Therefore, the temple 14R has holes that penetrate in the vertical direction, which are easier to clean than holes with a bottom.

[0062] 9, the holes provided in the bridge inner portion 12I of the bridge 12 are holes that penetrate in the vertical direction. This makes it possible to reduce the weight of the bridge inner portion 12I and also to reduce the amount of material used for the bridge inner portion 12I, thereby contributing to cost reduction.

[0063] <Hardness of outer and inner shells>

[0064] The Shore hardness (A) of the outer shell (e.g., the outer shell of the rim 11, bridge 12, end piece 13, and temple 14) is preferably 100 degrees or more and 150 degrees or less. In particular, the Shore hardness (A) of the outer shell is more preferably 120. Here, if the Shore hardness of the outer shell is less than 100 degrees, it becomes difficult to maintain the shape of the eyeglass frame, which is undesirable. Furthermore, if the Shore hardness of the outer shell is greater than 150 degrees, it becomes difficult for the eyeglass frame itself to deform, which is undesirable because it is unable to adequately absorb impacts or the eyeglass frame itself may be damaged. Furthermore, if the Shore hardness of the outer shell is greater than 150 degrees, it becomes difficult to remove the molded eyeglass frame 1 from the mold when molded by injection molding, which is undesirable.

[0065] Specifically, for example, the thermoplastic resin rubber elastic body of the outer shell can be made of a material conforming to the TED-602 standard (a product of Dongguan Changsheng New Material Co., Ltd.) The thermoplastic resin rubber elastic body conforming to the TED-602 standard contains styrene ethylene butylene styrene, naphthenic oil, polypropylene, calcium carbonate, and an antioxidant as ingredients.

[0066] Furthermore, it is preferable that the Shore hardness (A) of the inner shell portion (e.g., the inner shell portions of the rim 11, bridge 12, and temples 14) be 30 degrees or more and 70 degrees or less. In particular, it is more preferable that the Shore hardness (A) of the outer shell portion be 55. Here, if the Shore hardness of the inner shell portion is less than 30 degrees, it becomes difficult to maintain the shape of the inner shell portion of the eyeglass frame, which is undesirable. Furthermore, if the Shore hardness of the inner shell portion is greater than 70 degrees, it becomes difficult to ensure cushioning properties and is unable to sufficiently absorb impacts, which is undesirable. Furthermore, if the Shore hardness of the inner shell portion is less than 30 degrees, there is a risk that the inner shell portion will peel off from the outer shell portion. In other words, the adhesion between the outer shell portion and the inner shell portion will be reduced, and the strength of the inner shell portion itself will be reduced. As a result, the inner shell portion will be damaged during molding, increasing the possibility that molding will be impossible or yield will be reduced.

[0067] Specifically, for example, the thermoplastic resin rubber elastic body of the outer shell can be one that meets the P801-55A32 standard (manufactured by Dongguan Changsheng New Material Co., Ltd.) The thermoplastic resin rubber elastic body of the P801-55A32 standard contains styrene ethylene butylene styrene, naphthenic oil, polypropylene, calcium carbonate, and an antioxidant as ingredients.

[0068] Furthermore, it is preferable that the inner shell portion (e.g., the inner shell portion of the rim 11, bridge 12, and temples 14) have a higher frictional force than the outer shell portion (e.g., the outer shell portion of the rim 11, bridge 12, end piece 13, and temples 14). The frictional force of the inner shell portion improves the wearing comfort. Furthermore, since the friction between the inner shell portion and the wearer is strong and the friction between the outer shell portion and a specified object is weak, the effect of improving the safety of the wearer in the event of an impact such as a collision with the specified object is improved.

[0069] Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within the scope of achieving the object of the present invention are considered to be included in the present invention.

[0070] Furthermore, the shapes of the eyeglass frame 1 shown in FIGS. 1 to 12 are merely examples for achieving the object of the present invention, and are not particularly limited.

[0071] (Modifications) (1) In the above embodiment, the temple inner casings 14RI, 14LI of the temple portion 14 are formed with multiple holes penetrating in the vertical direction, but this is not limited thereto. For example, the temple inner casings 14RI, 14LI may be formed with multiple bottomed holes instead of multiple holes penetrating in the vertical direction. Furthermore, multiple bottomed holes may be mixed with multiple holes penetrating in the vertical direction. (2) In the above embodiment, the bridge inner casing 12I of the bridge 12 is formed with holes penetrating in the vertical direction, but this is not limited thereto. For example, the bridge inner casing 12I may be formed with bottomed holes instead of holes penetrating in the vertical direction. (3) In the above embodiment, the rim inner casings 11RI, 11LI of the rim 11 are formed with multiple bottomed holes, but this is not limited thereto. For example, the rim inner casings 11RI, 11LI may be formed with multiple holes penetrating in the vertical direction instead of holes penetrating in the vertical direction. Furthermore, a plurality of bottomed holes and a plurality of holes that penetrate vertically may be mixed. (4) In the above-described embodiment, the eyeglass frame 1 is integrally molded simultaneously by two-color molding using two thermoplastic resin rubber elastic bodies with different hardnesses, and is molded using a softer thermoplastic resin rubber elastic body than the outer shell, but this is not particularly limited. That is, for example, the eyeglass frame may be integrally molded simultaneously using three or more thermoplastic resin rubber elastic bodies.

[0072] To summarize the above, an eyeglass frame to which the present invention is applied is sufficient as long as it has the following configuration, and can take on a variety of different embodiments. (1) That is, an eyeglass frame to which the present invention is applied (eyeglass frame 1) has a pair of rims (rims 11R and 11L) that secure lenses (lenses LR and LL), a bridge (bridge 12) that connects the pair of rims, and temples (temples 14R and 14L, respectively) that are connected to the rims (rims 11R and 11L, respectively) via end pieces (end pieces 13R and 13L, respectively), wherein the eyeglass frame is composed of an outer shell portion and an inner shell portion that is softer in hardness than the outer shell portion and is provided on at least a part of the inside of the outer shell portion, and the inner shell portion includes temple inner shell portions (temple inner shell portions 14RI and 14LI) that are provided on the inside of the temples of the outer shell portion.

[0073] As a result, suppose an impact is applied to the temples in the left-right direction (axis X direction) due to a collision of a predetermined object or the like. In this case, the temples of the eyeglass frame will be deformed. The inner temple shells are formed of a thermoplastic resin rubber elastic body, which is softer than the outer temple shells. Therefore, after coming into contact with the wearer, the inner temple shells will deform first compared to the outer temple shells. In this way, the inner temple shells reduce the impact, improving the safety of the wearer. Furthermore, during normal times other than when an impact is applied, the outer temple shells, which are harder than the inner temple shells, will maintain their shape, improving wearing comfort.

[0074] (2) The inner temple portion has a plurality of holes or a plurality of bottomed holes that penetrate in the vertical direction (axis Z direction) and are formed along the longitudinal direction of the temple (approximately axis Y direction).

[0075] This allows the multiple holes in the inner temple portions to deform (collapse), making deformation easier. That is, the inner temple portions reduce impacts, improving the safety of the wearer.

[0076] (3) The inner temple portion has a wall portion (for example, wall portion 14RI-W) between adjacent holes or apertures that is inclined from the front to the rear (toward the positive direction of axis Y) as it moves from the outside to the inside of the eyeglass frame (as it moves toward the positive direction of axis X in the case of 14R).

[0077] As a result, the inner surfaces of the temple inner portions generate frictional forces against the wearer after coming into contact with the wearer. Furthermore, the wall portions, which slope from front to rear as they move from the outside to the inside of the eyeglass frame, deform relative to the inner surfaces of the temple inner portions, causing the temples to move in the negative direction of the Y axis. This prevents the rims or lenses from coming into contact with the wearer, or, if they do come into contact, reduces the force pressing against the wearer, improving the safety of the wearer.

[0078] (4) The holes or apertures are provided in a non-contact area of ​​the inner temple portion that does not come into contact with the head of a wearer wearing the eyeglass frames.

[0079] As a result, the wearer does not come into contact with unevenness caused by the plurality of holes penetrating in the vertical direction, and therefore does not feel uncomfortable when wearing the mask, i.e., the wearing comfort is improved.

[0080] (5) The inner shell portion further includes a bridge inner shell portion provided inside the bridge of the outer shell portion.

[0081] As a result, the inner bridge portion reduces impacts (especially impacts from a direction in front of the wearer), improving the safety of the wearer.

[0082] (6) The inner portion of the bridge has a hole or a bottomed hole that penetrates in the vertical direction.

[0083] This allows the holes or bottomed holes in the inner bridge portion to deform (crush), making deformation easier. That is, the inner bridge portion reduces impact, improving the safety of the wearer.

[0084] (7) The inner portion further includes inner rim portions provided inside the upper and lower edges of the rim of the outer portion.

[0085] As a result, for example, suppose an impact is applied to the inner rim portion from a direction that is forward of the wearer. In this case, the rim of the eyeglass frame and other components will deform. Specifically, for example, the inner surface of the inner rim portion will come into contact with the wearer. As described above, the inner rim portion is made of a thermoplastic resin rubber elastic body that is softer than the outer rim portion. Therefore, the inner rim portion will deform first compared to the outer rim portion. Furthermore, since the inner rim portion has multiple holes or multiple bottomed holes formed therein as described above, it will deform more easily as the multiple holes or multiple bottomed holes deform (collapse). This allows the inner rim portion to reduce the impact and improve the safety of the wearer.

[0086] (8) The rim inner portion has a plurality of bottomed holes formed along the left-right direction.

[0087] This allows the rim to deform as a whole due to the multiple bottomed holes, improving safety for the wearer.

[0088] (9) The hole on the upper edge side (positive side of axis Z) of the rim inner portion has a bottom (bottom 11RI-B) formed on the lower side (negative side of axis Z), and the hole on the lower edge side (negative side of axis Z) of the rim inner portion has a bottom (bottom 11RI-B) formed on the upper side (positive side of axis Z).

[0089] This means that deformation of the inner rim portion, and therefore the rim itself, is minimal in response to a slight force (for example, an inertial force caused by the wearer's movement), improving the wearing comfort.

[0090] (10) The Shore hardness (A) of the outer shell is 100 degrees or more and 150 degrees or less.

[0091] This allows the eyeglass frame to maintain its shape. The Shore hardness of the outer shell also allows the eyeglass frame to maintain its deformability. This means that the eyeglass frame itself can absorb deformation and impact, reducing the risk of breakage.

[0092] (11) The Shore hardness (A) of the inner shell is 30 degrees or more and 70 degrees or less.

[0093] This allows the shape of the inner part of the eyeglass frame to be maintained, and also ensures cushioning. That is, it is possible to maintain the shape while sufficiently absorbing impact.

[0094] (12) The end piece has a recess recessed from the outside toward the inside.

[0095] This allows the temple ends (the ends facing the rear from the wearer's perspective) to be deformed flexibly and without cracks, regardless of whether they are deformed in the direction of closing or opening the temples.

[0096] 1: Eyeglass frame 1, 11, 11R, 11L: Rim, 11LI, 11RI: Rim inner portion, 11LO, 11RO: Bridge outer portion, 12: Bridge, 12I: Bridge inner portion, 12O: Bridge outer portion, 13, 13R, 13L: End piece, 14, 14R, 14L: Temple, 14RI, 14LI: Temple inner portion, 14RI, 14LI: Temple outer portion

Claims

1. A spectacle frame having a pair of rims for fixing lenses, a bridge connecting the pair of rims, and temples connected to the rims via end pieces, wherein the spectacle frame is composed of an outer portion and an inner portion which is softer in hardness than the outer portion and is provided on at least a part of the inside of the outer portion, and the inner portion includes a temple inner portion which is provided on the inside of the temple of the outer portion.

2. The eyeglass frame according to claim 1, wherein the inner casing of the temple has a plurality of holes or a plurality of bottomed holes formed therein that penetrate vertically along the longitudinal direction of the temple.

3. The eyeglass frame according to claim 2, wherein the inner temple portion has walls between adjacent holes or apertures that slope from the front to the rear as they move from the outside to the inside of the eyeglass frame.

4. The eyeglass frame according to claim 2, wherein the holes or apertures are provided in a non-contact area of ​​the inner temple portion that does not come into contact with the head of a wearer wearing the eyeglass frame.

5. The eyeglass frame according to any one of claims 1 to 4, wherein the inner portion further includes a bridge inner portion provided inside the bridge of the outer portion.

6. The eyeglass frame according to claim 5, wherein the inner casing of the bridge is formed with a hole or a bottomed hole penetrating in the vertical direction.

7. The eyeglass frame according to any one of claims 1 to 4, wherein the inner portion further includes a rim inner portion provided on the inside of the upper and lower edges of the rim of the outer portion.

8. The eyeglass frame according to claim 7, wherein the inner rim portion has a plurality of bottomed holes formed along the left-right direction.

9. The eyeglass frame according to claim 8, wherein the hole on the upper edge side of the inner rim portion has a bottom formed on the lower side, and the hole on the lower edge side of the inner rim portion has a bottom formed on the upper side.

10. The eyeglass frame according to any one of claims 1 to 9, wherein the Shore hardness (A) of the outer portion is 100 degrees or more and 150 degrees or less.

11. The eyeglass frame according to any one of claims 1 to 10, wherein the Shore hardness (A) of the inner portion is 30 degrees or more and 70 degrees or less.

12. The eyeglass frame according to any one of claims 1 to 11, wherein the end piece has a recess that is recessed from the outside toward the inside.

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