JP7708370B2 - Shape-adaptive materials - Google Patents

Description

The present invention relates to a member that allows the fitting portion of a piece of eyeglasses, accessories, or other attachments to fit onto a receiving object, such as the head of a person wearing eyeglasses, the arm or neck of a person wearing an accessory, or the body of an animal, equipment, or other object, when the eyeglasses, accessories, or other attachments are worn on the receiving object. In particular, the present invention relates to a shape-adaptable member that can maintain a fitting state by deforming to follow any changes in the shape or size of the receiving object.

When attaching an accessory to an object, the shape of the attachment part of the accessory must be adapted to the shape and size of the object, and an example of this is the temple of an eyeglass frame. The temple fits to the side of the head of the eyeglass wearer (object), preventing the eyeglass frame (accessory) from falling off or slipping off.
However, since eyeglass frames are generally mass-produced according to a uniform standard, if the shape or size of the wearer's head changes, the temples and end pieces may no longer fit the wearer's head properly. To solve this problem, eyeglass stores fine-tune eyeglass frames to fit the wearer.

Spring-hinged eyeglasses are also known in which the hinge portion at the base of the temple is made springy, and the spring force of the hinge portion presses the temple against the side of the head, thereby preventing the temple from falling off or shifting.
5 is a diagram explaining the function of an eyeglass frame with spring properties in the hinges. Temples T are foldably attached to both left and right ends of a front frame F that holds the lenses by hinges C. A spring is built into the hinge C, which applies a spring force to the left and right temples T, T so as to pinch the head H of the eyeglass wearer.

In a spectacle frame equipped with this type of spring hinge C, the shape of the temples T and the width between the left and right temples T, T have been adjusted to fit the head H1 with head width L1. When the spectacle frame is worn by a wearer with head H2 with head width L2 (L1 < L2), the width between the left and right temples T, T expands to match the head width L2, and the spectacle wearer's head H2 is clamped from the left and right.

However, because the left and right temples T, T only open linearly with the hinge C as a fulcrum as the head width changes from L1 to L2, there is a problem that the contact length between the head H2 and the expanded temple T decreases, as shown by the imaginary line in Figure 5, resulting in a poor fit. Also, when the width between the left and right temples T, T expands to L2 to fit the head H2, the clamping force of the spring of the hinge C also increases accordingly, causing inconveniences such as an uncomfortable feeling for the eyeglass wearer.

To solve these problems, there are also known eyeglass frames, such as those described in Patent Document 1, which have elastic parts in the temples (parts indicated by reference numeral 45 in Patent Document 1) and allow the temples (elastic temples) to elastically deform at these elastic parts according to the width of the eyeglass wearer's head, thereby improving the fit while minimizing discomfort even for eyeglass wearers with different head widths.

In an eyeglass frame equipped with such elastic temples, when the wearer's head width changes from L1 to L2 as in the case shown in Figure 5, the elastic portion elastically deforms in response to the stress acting on that portion. The form of deformation is not linear like the springy hinge C in Figure 5, but an inwardly curved arc, which has the advantage that a relatively long contact length can be maintained with the eyeglass wearer's head H1, H2 even if the size or shape of the head changes. In addition, if the rear end of the elastic temple is curved significantly in advance to fit the eyeglass wearer's head H1, H2, there is the advantage that the contact length can be further extended.

However, even with this type of eyeglass frame, there is still a problem that the contact state of the part that contacts the side of the head is not maintained sufficiently, resulting in a partial point contact state that makes the eyeglass wearer feel uncomfortable, etc. In addition, since the elastic part (part indicated by reference numeral 45 in Patent Document 1) of this type of eyeglass frame is exposed, the shape of the elastic part must be designed while taking into consideration the design of the eyeglass frame, and there is also a problem that it is difficult to design an elastic part that has a sufficient fit.
For this reason, eyeglass frames have been proposed that use hinges with spring properties to prevent such elastic temples from falling off or shifting while reducing the overall pressure on the parts that come into contact with the temples.

JP 2008-96598 A

The present invention was made in consideration of the problems with the conventional technology described above, and aims to provide a shape-adaptable member that can maintain a good contact state and maintain a high level of fit even if the shape or size of the body to which it is attached changes, and can effectively prevent the attached item from falling off or shifting.

As described above, if the temples are made elastic using a material such as β-titanium, as in the eyeglass frame described in Patent Document 1, even if the shape and size of the eyeglass wearer's head changes slightly, the change in the contact length between the temples (elastic temples) and the side of the eyeglass wearer's head can be suppressed to a certain extent to follow the change, and the fit can be maintained. However, as described above, even with such conventional elastic temples, there is still a problem that the fit is insufficient.
After careful consideration, the inventors of the present invention came to the conclusion that the reason the fit of the above-mentioned conventional elastic temples is insufficient is that only the front half of the elastic temple provides elasticity, and that the part providing elasticity is exposed, imposing design restrictions.
Therefore, the present invention was conceived as follows: if it is possible to control the elasticity over the entire length of the temple, and if the core material is made inconspicuous in appearance by covering it with another member, for example, and is designed in a manner that is not subject to design constraints, it will be possible to obtain a temple for an eyeglass frame that can maintain a contact length of a certain level or more even if the shape and size of the eyeglass wearer's head changes slightly, does not cause discomfort to the eyeglass wearer, and effectively prevents the temple from falling off or shifting.

Furthermore, in achieving the object of the present invention, the inventor of the present invention focused on elastic members such as coil springs. Elastic members such as coil springs are constantly subject to a restoring force that tries to return them to their original shape. Although it is difficult for an elastic member such as a coil spring to maintain an arbitrary shape by itself, when combined with a core material, it has the advantage that not only can it be made into any shape, but that shape is also easily maintained. The inventor of the present invention came up with the invention by combining a coil spring with an elastic core material, based on these advantages of the coil spring.

Specifically, as described in claim 1, the present invention is a shape-adaptable member used in the temples of glasses, which prevents a certain length of contact state of the temples with the head from changing even when the reference glasses wearer is replaced by another glasses wearer having a different head size or shape, and comprises a hollow elastic member and a core material inserted into a hollow hole of the elastic member and cooperating with the elastic member to determine the shape of the elastic member, the core material is inserted into at least the portion of the elastic member that contacts the head, and elastically deformable portions that elastically deform into a curved shape due to the bending force acting when the glasses are worn by the glasses wearer and non-deformable portions that do not deform are arranged alternately in the axial direction of the elastic member, and the elastic member is formed in a curved shape in advance in part or in whole so that it contacts the head of the reference glasses wearer over a certain length and the pressure distribution in the contact portion is uniform, and a plurality of the core materials are inserted in the axial direction of the hollow hole of the elastic member, or a plurality of the core materials are inserted and arranged radially of the hollow hole .

According to this configuration, for example, an elastic member such as a coil spring having an elastic force in a direction to return to a linear shape is used, whereas a core material having an elastic force in a direction to follow the shape of the wearer such as the head of the eyeglass wearer is used. The core material is plastically deformed in advance to match the reference shape of the wearer, and the elastic force of the elastic member having an elastic force in the opposite direction is cooperated with the elastic member to make the elastic member and the core material match the reference shape. In this way, the elastic member and the wearer are in contact with each other at a certain length in the wearer of the reference shape, and the core material is provided with one or more elastic deformation parts with different amounts of elastic deformation when a certain bending force is applied, so that the contact state of the certain length can be maintained even when the elastic member is worn on another wearer of a different shape or size. The form and arrangement of the elastic deformation parts vary depending on the type of wearer and the degree of change in shape or size, but can be determined by experiment or empirical rules. The shape adaptable member of the present invention has the advantage that the shape of the core material is not visible on the outside because the core material is covered with the elastic member, and therefore the shape of the core material can be freely selected.

As described in claim 2 , the elastic member may be, for example, a winding in which a metal wire is wound in a coil shape, a twisted wire in which a plurality of metal wires are twisted together, or a braided wire in which a plurality of metal wires are braided. Or, a combination of two or more of these may be used. For example, the winding may be covered with the twisted wire or the braided wire. The arrangement of the elastic deformation parts in one core material may be such that parts that are easy to elastically deform and parts that are difficult to elastically deform are alternately arranged. In addition, as described in claim 3 , at least one of the cross-sectional diameter, cross-sectional shape, material, and hardness may be changed in the length direction in one of the elastic deformation parts so that the amount of elastic deformation when a certain bending force is applied to the core material is non-uniform in the length direction.

In the present invention, the elasticity of the shape adaptable member is determined by the cooperation of the elastic force of the elastic member and the elastic force of the core material. Therefore, as described in claim 4 , at least one of the elastic member and the core material can be made replaceable, and the combination of the elastic member and the core material can be changed in various ways to obtain an optimal combination. For example, when the shape adaptable member of the present invention is applied to the temple of an eyeglass frame, if it is desired to adjust the strength of the pressing force of the temple between normal use and exercise, it is sufficient to replace either one or both of the elastic member and the core material.

According to the present invention, even if the shape or size of the object to be worn, such as the head of the eyeglass wearer, changes from a standard shape or size, it is possible to provide a shape adaptable member that allows the wearer to contact the object to be worn at a constant length in response to this change, providing an appropriate fit. When the present invention is applied to the temples of an eyeglass frame, for example, the cooperation of the core material and the elastic member allows the temples to always contact the head of the eyeglass wearer at an optimal contact length, making it possible to provide an eyeglass frame that is less likely to slip or fall off.

Furthermore, for example, an eyeglass store can stock several types of eyeglass frames with temples that are tailored to standard head shapes and sizes, or can appropriately combine multiple types of elastic members and core materials, thereby reducing the number of times the shape of the temples needs to be fine-tuned to suit each individual eyeglass wearer, significantly reducing the burden on the eyeglass store.
The shape adaptive member of the present invention is not limited to eyeglass frames, but can also be applied to bracelets and other accessories or other wearable items that are attached to the body.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1(a) is a diagram showing one embodiment of the shape-adaptable member of the present invention, (b) is a diagram showing an example of a core material used in the shape-adaptable member of (a), (c)(i)(ii)(iii) are diagrams showing an example of the cross-sectional shape in the II direction of (a), and (d)(i)(ii)(iii) are diagrams showing an example of the cross-sectional shape of the elastically deformable portion in the II-II direction of (b).
In the following description, the shape-adaptable member is used for the temples of an eyeglass frame, which is the wearing body, and is described as elastically deforming the shape of the temples to fit the head of the eyeglass wearer, which is the receiving body, when the eyeglass frame is worn on the head of the eyeglass wearer.

1, the shape adaptable member 1 has a winding 12 as an elastic member, and a linear core material 11 inserted into a hollow hole 12a of the winding 12. The diameter of the hollow hole 12a is not particularly limited as long as the core material 11 can be inserted therein, but it is preferable that the diameter is approximately the same as the maximum outer diameter of the core material 11.
The winding 12 is in the form of a coil spring in which a metal wire is tightly wound into a coil shape, and has a basic shape along the linear axis Z (the shape in FIG. 1(a)). The metal wire may be made of elastic metals such as stainless steel, spring steel, Ti or Ti alloy, NT alloy, beryllium copper, or resin materials such as superelastic resin. When the winding 12 is bent by applying a bending force in a direction intersecting the axis Z, an elastic force is generated in the winding 12 that tries to return to the basic shape. The magnitude of the elastic force generated in the winding 12 in the return direction can be adjusted by the material and wire diameter of the metal wire.
The cross-sectional shape of the winding 12 is not limited to a circle as shown in FIG. 1(c)(i), but may be an ellipse as shown in (c)(ii) or a square as shown in (c)(iii).

The core material 11, like the winding wire 12, can be made of elastic metals such as stainless steel, spring steel, Ti or Ti alloy, NT alloy, Beryl copper, etc., as well as resin materials such as superelastic resin. The core material 11 cooperates with the winding wire 12 to maintain the temples in contact with the head over a certain length due to the bending force generated when the eyeglass frame is worn on the head of the eyeglass wearer, and generates a resilient force in the temples that holds the head from the left and right. Here, the "certain length" when the shape adaptable member of the present invention is applied to an eyeglass frame refers to the length over which the temples contact the eyeglass wearer from the temples to the back of the head.

In order to maintain the constant length of contact even if the size or shape of the head changes, the core material 11 of this embodiment has a configuration in which elastically deforming portions 111, 112, 113... of lengths S1, S2, S3... that are elastically deformed into a curved shape due to the bending force generated when the eyeglass frame is worn on the head of the eyeglass wearer, and non-deforming portions 114, 115, 116... of lengths H1, H2, H3... that are hardly deformed by the bending force are alternately arranged as shown in FIG. 1(b). In this embodiment, the diameter of the elastically deforming portions 111, 112, 113... is made smaller than the diameter of the non-deforming portions 114, 115, 116..., and the dimensions of lengths S1, S2, S3... and lengths H1, H2, H3... are appropriately selected, thereby adjusting the deformation form of the core material 11 to maintain the constant length of contact.

In order to adjust the deformation form of the core material 11 and maintain the contact state of the constant length, it is possible to change not only the cross-sectional diameter of the elastically deforming parts 111, 112, 113, etc. as described above, but also the cross-sectional shape. Figure 1 (d) shows an example of the cross-sectional shape of part II-II, and an elliptical or rectangular cross-sectional shape such as (ii) and (iii) makes the core material 11 less likely to bend than a circular cross-sectional shape such as (i), which means that the elasticity can be increased. In addition, by appropriately selecting the cross-sectional shape, there is also the advantage that the bending direction can be regulated.

That is, the elastically deforming portions 111, 112, 113... having a circular cross section as shown in Fig. 1(d)(i) can elastically deform in all directions. On the other hand, if the cross section of the elastically deforming portions 111, 112, 113... is elliptical as shown in Fig. 1(d)(ii), the elastic deformation of the elastically deforming portions 111, 112, 113... is restricted in one direction (the up-down direction in the illustrated example), and if the cross section is rectangular as shown in Fig. 1(d)(iii), the direction of elastic deformation is substantially limited to one direction (the left-right direction in the illustrated example).
In this way, by combining the diameter, length, cross-sectional shape, and metal material forming the elastic deformation portions 111, 112, 113... of the elastic deformation portions 111, 112, 113..., it is possible to freely adjust the degree and direction of elastic deformation of the elastic deformation portions 111, 112, 113....

Of course, the cross-sectional diameter and cross-sectional shape of each of the elastically deformable portions 111, 112, 113... may be constant over the entire length of the length S1, S2, S3..., but the cross-sectional diameter and cross-sectional shape may be changed at intermediate portions of the length S1, S2, S3.... The material of each of the elastically deformable portions 111, 112, 113... may be changed, or the elasticity may be changed by annealing or the like.
The above-mentioned elastically deformable portions 111, 112, 113, . . . can be formed by swaging, pressing or cutting an intermediate portion of the core material 11.

The shape adaptable member 1 is formed by inserting the core material 11 having the above-mentioned configuration into the hollow hole 12a of the winding 12 as an elastic member and fixing both ends of the winding 12 to the core material 11. Prior to inserting the core material 11 into the hollow hole 12a of the winding 12, the core material 11 is plastically deformed to a preset shape, for example, to match the shape of the head of a reference eyeglass wearer. Since the winding 12 is in the form of a coil spring, inserting the plastically deformed core material 11 into the hollow hole 12a of the winding 12 causes the winding 12 to assume a shape conforming to the shape of the core material 11.
Since the shape of the shape-adaptable member 1 is determined by the cooperation of the elastic force of the winding 12 attempting to return to a straight line and the elastic force of the core material 11 attempting to return to a preset shape, the shape of the core material 11 after plastic deformation is selected so that the shape-adaptable member 1 consisting of the core material 11 and the winding 12 comes into contact with the head of a reference eyeglass wearer over the entire length of the contact portion.

The winding 12 can be fixed to the endpiece of the eyeglass frame by soldering, welding, adhesion, etc. It can be made detachable from the endpiece by means of a screw of a bolt or nut, or the core material 11 can be fixed to the endpiece and made removable from the core material 11, so that the winding 12 can be replaced with one having a different elasticity or shape.
The core material 11 may be inserted into the winding 12 and fixed at both ends, or the core material 11 may be fixed to the end piece. Examples of the fixing method include brazing, welding, adhesion, screws such as bolts and nuts, or stoppers.
By using a screw or a stopper such as a bolt or nut, the core material 11 can be freely replaced with respect to the winding 12.
In this way, by making either or both of the winding 12 and the core material 11 freely replaceable, it becomes possible, for example, to change the amount of pressure applied to the head of the person wearing the glasses depending on the purpose, such as sports or everyday use, to replace the winding 12 with one having a different design, coloring, pattern, etc., or to replace the winding 12 with a different elastic material, such as a twisted wire or braided wire.

Furthermore, one or more layers of another winding 12 may be fitted around the winding 12, or another elastic member such as a twisted wire or a braided wire may be fitted around the winding 12. Also, a decorative material or covering material that can be deformed integrally with the shape adaptable member 1 may be provided. For example, a heat shrink pipe may be fitted around the winding 12 and heat shrunk.

Incidentally, when an eyeglass frame having the shape adaptable member 1 of this embodiment applied to the temple portion is worn on the head of a reference eyeglass wearer and then on the head of another eyeglass wearer who is different in size and shape, in order to maintain a constant contact length between the head and the temples for each eyeglass wearer, it is necessary to appropriately select the form of elastic deformation of the core material 11.
The form of elastic deformation of the core material 11 can be obtained by experiment or experience. For example, a plurality of pressure measurement points are provided at the contact portion between the temple and the head, and the form of elastic deformation of the core material 11, i.e., the shape of the core material 11 (positions, length, cross-sectional shape, cross-sectional diameter, etc. of the elastically deforming portions 111, 112, 113) can be determined from the change in the pressure at each pressure measurement point before and after the shape and size of the head change.
Fig. 2 is a diagram showing an embodiment in which the shape adaptable member 1 of the present invention is applied to the temple of an eyeglass frame, and is a plan view of the eyeglass frame showing the state when the temple elastically deforms in response to changes in the size and shape of the eyeglass wearer's head. A plurality of pressure measurement points A to E (five in the illustrated example) are provided at equal intervals between one end and the other end of the contact portion of the temple T. Fig. 3(a) is a graph showing the distribution of pressure at the pressure measurement points A to E on the temple T of the eyeglass frame of Fig. 2, and (b) is a schematic diagram showing an example of the shape of a core material for making the distribution of pressure at the pressure measurement points A to E uniform based on the graph (a).

The shape of the core material 11 is determined in advance and plastically deformed so that the pressure at each of the pressure measurement points A to E in the contact portion where the temple T contacts the head H1 (width L1) of the standard eyeglass wearer is approximately equal to a reference value. If the pressure at each of the pressure measurement points A to E is approximately equal, it can be said that the temple T is in contact with the head H1 of the eyeglass wearer over the entire contact length Z1 in the contact portion.
Next, the eyeglass frame is placed on the head H2 (width L2) of another eyeglass wearer, and the change in pressure is measured at each of the pressure measurement points A to E. The graph in Fig. 3(a) shows the change in pressure at each of the pressure measurement points A to E relative to the reference value. That is, the pressure at the pressure measurement points A, C, and E is stronger by P1, P2, and P3, respectively, at the pressure measurement point B it is almost the reference value, and at the pressure measurement point D it is weaker by P4.

Therefore, the diameter of the core material is reduced before and after the pressing force measurement points A, C, and E to reduce the pressing force. Also, since it can be assumed that the temple is floating (not in contact) with the head H2 due to bending at the pressing force measurement point D, the diameter of the core material is reduced at the pressing force measurement point D to facilitate elastic deformation, so that the temple is in contact with the head H2 even at the pressing force measurement point D. The shape of the core material 11 formed based on these considerations is shown in FIG. 3(b) in schematic form. After selecting the shape shown in FIG. 3(b), it is advisable to mount the eyeglass frame on the reference head H1 again and adjust the shape of the core material 11 so that the pressing forces at the pressing force measurement points A to E are approximately equal.
By repeating the above procedure, even if the width of the head portion changes from L1 to L2, the contact lengths Z1, Z2 with the temple T between the head portions H1, H2 can be made to change very little.

In this way, in the present invention, for example, in the temple T of an eyeglass frame, even if the shape or size of the head changes to a size or shape different from the standard, the contact length between the temple T and the heads H1, H2 can be maintained constant, making it possible to obtain a better fit than the elastic temples described in Patent Document 1. Also, a linear member can be used as the core material 11, and this core material 11 is inserted into the hollow hole 12a of the winding wire (elastic member) 12, so that the core material 11 does not appear on the exterior of the eyeglass frame, and a better fit can be obtained by freely selecting the shape of the core material 11.
Therefore, eyeglass retailers and the like only need to prepare multiple types of eyeglass frames with temples T of standard shapes and sizes, which reduces the need for fine-tuning work to suit the eyeglass wearer at eyeglass retailers and the like, thereby reducing the burden on eyeglass retailers and the like.

Figure 4 is a cross-sectional view showing another embodiment of the shape adaptable member of the present invention. In Figure 4, the core material 11 is hatched to make the presence of the space S easier to understand. In this embodiment, the shape adaptable member 1 is applied to the eyeglasses M as an example. The eyeglasses M in this embodiment have a straight portion 12b of length X in the middle. Since the coil spring-like winding 12 has elasticity in the direction of returning to a straight state, in this embodiment, the straight portion 12b is made into a space S where the core material 11 is not provided by utilizing this elasticity. Such a space S can be formed by dividing the core material 11 at the front and rear of the eyeglasses M, or by inserting multiple core materials 11 (two in the illustrated example) into the eyeglasses M while separating them at the space S.

Although the preferred embodiments of the present invention have been described, the present invention is not limited to the above description.
For example, in the above description, a wire wound in the shape of a coil is used as the elastic member, but a twisted wire made by twisting together multiple metal wires or a braided wire made by braiding multiple metal wires may also be used as the elastic member. The elastic member may also be formed by combining two or more of these.
In the above description, the shape adaptable member of the present invention is applied to the temples of eyeglass frames, but it can also be applied to other parts such as bridges, end pieces, tips, rims, etc., and it can also be applied not only to eyeglass frames but also to accessories such as bracelets, etc. Furthermore, the object to which the shape adaptable member of the present invention is applied is not limited to the human body, but can also be applied to the bodies of animals such as dogs and cats, equipment, and other objects, etc., which are required to fit to any object that changes slightly from a standard shape or size, even if the object changes.
Furthermore, in the other embodiment shown in FIG. 4, the space S is formed only in the straight portion 12b, which is the shape in which the elastic member returns to its original shape (straight in the case of the coil spring-shaped winding 12). However, the space S is not limited to the straight portion 12b, and may be appropriately formed in any portion in which the elastic force of the elastic member, such as the winding 12, is to be utilized as is.

FIG. 1(a) is a diagram showing one embodiment of the shape-adaptable member of the present invention, (b) is a diagram showing an example of a core material used in the shape-adaptable member of (a), (c)(i)(ii)(iii) are diagrams showing an example of the cross-sectional shape in the II direction of (a), and (d)(i)(ii)(iii) are diagrams showing an example of the cross-sectional shape of the elastically deformable portion in the II-II direction of (b). FIG. 1 is a diagram showing one embodiment in which the shape-adaptable member of the present invention is applied to the temples of an eyeglass frame, and is a plan view of the eyeglass frame showing the appearance when the temples elastically deform in response to changes in the size and shape of the eyeglass wearer's head. 3A is a graph showing the distribution of pressure at pressure measurement points A to E at temple T of the eyeglass frame in FIG. 2, and FIG. 3B is a schematic diagram showing an example of a core material shape for making the distribution of pressure at pressure measurement points A to E uniform based on the graph in FIG. 11 is a cross-sectional view showing another embodiment in which the shape adaptable member of the present invention is applied to the end piece of an eyeglass frame. FIG. 11A and 11B are diagrams illustrating the operation of a conventional eyeglass frame having spring properties in the hinge portion according to the present invention.

1 Shape adaptable member 11 Core material 111, 112, 113 Elastically deformable portion 114, 115, 116 Non-deformable portion 12 Winding (elastic member)
12a Hollow hole 12b Straight section C Hinge F Front frame S Space T Temple H1, H2 Head L1, L2 Head width Z1, Z2 Contact length X Length of space S

Claims (4)

A shape adaptable member that is used for the temples of spectacles and prevents a contact state of the temples with the head from changing over a certain length even when the standard spectacles wearer is replaced by another spectacles wearer having a different head size or shape,
A hollow elastic member;
a core member that is inserted into the hollow hole of the elastic member and cooperates with the elastic member to determine the shape of the elastic member;
The core material is
The elastic member is inserted into at least a portion of the elastic member that comes into contact with the head, and elastically deformable portions that are curved and non-deformable portions that do not deform due to a bending force acting on the eyeglass wearer when the eyeglass wearer wears the eyeglasses are arranged alternately in the axial direction of the elastic member, and the elastic member comes into contact with the head of the reference eyeglass wearer over a certain length, and a part or all of the elastic member is formed in advance into a curved shape so that the pressure distribution in the contacting portion is uniform,
A plurality of the core materials are inserted in the axial direction of the hollow hole of the elastic member, or a plurality of the core materials are inserted and arranged in the radial direction of the hollow hole;
A shape adaptable member comprising: The shape-adaptable member according to claim 1, characterized in that the elastic member is a winding made of a metal wire wound into a coil shape, a twisted wire made of multiple metal wires twisted together, or a braided wire made of multiple metal wires, or a combination of two or more of these. A shape-adaptable member as described in claim 1 or 2, characterized in that in one of the elastic deformation portions, at least one of the cross-sectional diameter, cross-sectional shape, material, and hardness is changed in the longitudinal direction , thereby making the amount of elastic deformation when a constant bending force is applied to the core material non-uniform in the longitudinal direction. 4. The shape adaptable member according to claim 1 , wherein at least one of the elastic member and the core material is replaceable.