TW201912966A - Hinge - Google Patents

Abstract

It is an object of the present invention to provide a hinge that is simple in construction and has an automatic "close" function. The hinge of the present invention has a first member, a second member, and a bent portion that joins the first member and the second member and rotates the first member or the second member, wherein the bent portion includes silicone rubber. The silicone rubber is strained in an open state in which the first member and the second member are opened, and is biased in a direction to close the first member and the second member.

Description

 Hinge  

The present invention relates to a hinge constructed of a simple structure having an automatic closing function.

In a mobile phone such as a smart phone, a shock absorbing protective case or a screen protective cover may be attached to prevent breakage such as dropping (see Patent Document 1).

In recent years, a wide variety of smart phone cases have been sold, and so-called notebook type smart phone cases are also sold in various forms. In the notebook smart phone case, the front cover is generally opened when the smart phone is operated, and the front cover is manually closed after use.

 Prior art literature    Patent literature  

Patent Document 1: Japanese Laid-Open Patent Publication No. 2014-082689

In the conventional smart phone case, when falling during operation, the operation screen is easily broken due to collision with the ground in a state where the operation screen is exposed. Accordingly, it is an object of the present invention to provide a hinge having a simple structure and having an automatic "close" function.

As a result of intensive studies to solve the above problems, the present inventors have found that the present invention can be easily accomplished by simply using a specific enamel rubber for a hinge to give a "close" function.

That is, the present invention is as follows.

A hinge according to the present invention for solving the above problems, comprising: a first member, a second member, and a bent portion, wherein the bent portion connects the first member and the second member in a line shape such that the first a member and/or the second member are axially rotatable in a direction of the line of the joint, wherein the bent portion comprises a rubber, the rubber in the first member and the second member Straining occurs in an open state in which the component is opened, and a force is applied in a direction to close the first component and the second component, the mass of the first component and/or the second component being less than the mass of the first component And a stress applied in a direction in which the first member and the second member are closed in an open state in which the second member is opened by 180°.

According to the hinge of the present invention, when in a state in which the first member and the second member are manually opened, the dam rubber loaded in the bent portion is strained, so that the force is applied in a direction to close the first member and the second member. Furthermore, the mass of the first component and/or the second component is less than the stress applied in the direction of closing the first component and the second component. Thereby, the effect that the first member and/or the second member are automatically closed when the hand is released can be obtained.

In addition, since the ruthenium rubber is excellent in durability against deformation and light resistance to light such as ultraviolet rays, it is difficult to deteriorate even when it is repeatedly opened and closed or used outdoors, and it can be used for a long period of time.

Further, as an embodiment of the hinge of the present invention, it is characterized in that the mass of at least one of the first member or the second member is greater than the stress.

According to this feature, since the mass of at least one of the first member or the second member is greater than the stress applied in the direction of closing the first member and the second member, for example, when the first member and the second member are opened 360 In the open state of °, by using the self-weight pressing of the member having a mass greater than the stress, the open state can be maintained even when the hand is released.

Further, as an embodiment of the hinge of the present invention, the stress is 1 to 100 g.

When the stress applied in the direction of closing the first member and the second member is excessively large, it cannot be easily opened manually, and thus by setting the stress to 1 to 100 g, it is possible to provide a simple opening by a weak force such as a fingertip, and excellent use performance. Hinge.

Further, an embodiment of the hinge according to the present invention is characterized in that the enamel rubber is composed of a ruthenium rubber tube having a substantially arc-shaped cross section.

By using a ruthenium rubber tube having an approximately circular cross section, when the first member and the second member are opened to deform the ruthenium rubber, a load due to strain is applied to the entire ruthenium rubber. Therefore, for example, it is excellent in durability compared with a shape in which a strain load is locally applied, such as a beryllium rubber tube having a polygonal cross section.

Further, as an embodiment of the hinge of the present invention, the enamel rubber tube has an outer diameter of 6 to 20 mm and a thickness of 0.5 to 5 mm.

According to this feature, since it has a moderate stress, it is possible to realize a hinge which is simply opened by weak force and excellent in use performance.

Further, as an embodiment of the hinge of the present invention, the opening angle of the approximately circular arc-shaped cross section is 0 to 90°.

According to this feature, the first component and the second component can be closed until they abut.

According to the present invention, it is possible to provide a hinge having a simple structure and having an automatic "close" function.

1‧‧‧ first part

2‧‧‧ second part

3‧‧‧bend

10‧‧‧ Hinges

100‧‧‧Smart Phone Case

101‧‧‧ first flat section

102‧‧‧Second flat section

103‧‧‧Bends

104‧‧‧Protection object retention department

105‧‧‧矽Rubber tube

106,107‧‧‧ core material

200‧‧‧Hand mirror

201‧‧‧First Mirror Department

202‧‧‧Second mirror

203‧‧‧bend

300‧‧‧Business card holder

301‧‧‧ 盖部

302‧‧‧ Storage Department

303‧‧‧Bend

400‧‧‧ coin purse

401‧‧‧ 盖部

402‧‧‧Storage Department

403‧‧‧Bend

500‧‧‧ portable ashtray

501‧‧‧ 盖部

502‧‧‧ Storage Department

503‧‧‧Bend

600‧‧‧ Kettle

601‧‧‧ 盖部

602‧‧‧ Container Department

603‧‧‧bend

604‧‧‧ fixed plate

Fig. 1 is a schematic explanatory view showing the structure of a hinge of an embodiment of the present invention.

Fig. 2 is a perspective view showing an example of the shape of a silicone rubber according to an embodiment of the present invention.

Fig. 3 is a view showing an example of the shape of a cross section of the silicone rubber of the present invention.

Fig. 4 is a schematic view of a measuring device for "reaction force" used in the experiment.

Fig. 5 is a graph showing the measurement results of the "reaction force" obtained by experiments, wherein Fig. 5(a) is the relationship between the reaction force and the cross-sectional area of the elastic body, and Fig. 5(b) and Fig. 5(c) are The relationship between the reaction force and the opening angle of the elastomer.

Fig. 6 is a perspective view showing an application example 1 (smartphone case) of the hinge of the present invention.

Fig. 7 is a cross-sectional view showing a bent portion of an application example 1 (wisdom case) of the hinge of the present invention.

Fig. 8 is a perspective view of a second application example (hand mirror) of the hinge of the present invention.

Fig. 9 is a perspective view showing a third application example (business card holder) of the hinge of the present invention.

Fig. 10 is a perspective view of a fourth application example (coin wallet) of the hinge of the present invention.

Figure 11 is a perspective view of Application Example 5 (portable ashtray) of the hinge of the present invention.

Fig. 12 is a perspective view showing a sixth application example (kettle) of the hinge of the present invention.

Hereinafter, a hinge according to an aspect of the present invention will be described with reference to the accompanying drawings, but is not limited to the following aspects.

A hinge of the present invention having a first member, a second member, and a bent portion, the bent portion connecting the first member and the second member in a line shape such that the first member and/or the portion The second member is axially rotated in a direction of the line of the joint, wherein the bent portion includes a yoke rubber, and the yoke rubber is opened in an open state of the first member and the second member Generating strain and applying a force in a direction to close the first component and the second component, the mass of the first component and/or the second component being less than the mass of the first component and the second component The stress applied in the direction in which the first member and the second member are closed in the open state of 180° is opened (hereinafter sometimes referred to simply as “stress”).

FIG. 1 is a schematic explanatory view showing a hinge 10 of the present invention. Fig. 1(a) is a plan view, and Fig. 1(b) is a side view. The hinge 10 of the present invention includes a first member 1, a second member 2, and a bent portion 3 that linearly connects the first member 1 and the second member 2. The bent portion 3 is attached such that the first member 1 and the second member 2 are rotated in the axial direction of the connecting line shown in Fig. 1(a). The hinge 10 shown in Fig. 1 is a view showing a state in which the first member 1 and the second member 2 are opened by 180°, in a direction in which the first member 1 and the second member 2 are closed (the arrow shown in Fig. 1(b) Direction) Force.

The bent portion 3 is made of a rubber tube having a substantially arc-shaped cross section, and the first member and the second member are fixed along the longitudinal direction of the silicone rubber tube. Further, the first member and the second member are fixed to the outer peripheral surface side of the enamel rubber tube by an adhesive for a hard-to-bond material.

Fig. 2 is a schematic explanatory view showing a enamel rubber tube used in the bent portion 3. The enamel rubber pipe is obtained by cutting a part of the pipe, and has a substantially arc shape in cross section. The opening angle of the arc-shaped cross section formed by the region obtained by cutting the tube is not particularly limited, but is preferably 0 to 90° or 180°. In addition, an opening angle of 0° means that the slit is cut only on the tube, and a part thereof is not cut. The first part and the second part can be further closed by setting it to 90° or less. From the viewpoint of more reliably shutting down, it is preferably 60 or less, more preferably 30 or less, and particularly preferably 0. Further, in the case of 180°, since the tube after cutting half can be used, it is possible to manufacture two bent portions from one tube, and the yield is improved.

The shape of the ruthenium rubber is not particularly limited as long as it is strained by deformation and can be biased in a direction to close the first member and the second member. For example, a columnar shape in which the inner surfaces of the first member and the second member are connected as shown in FIG. 3(a) is listed, and the first member and the second member are shown in FIGS. 3(b) to 3(f). The outer surface of the outer surface is sandwiched by a scissors-like shape. Examples of the scissor shape include a polygonal shape (see FIGS. 3( b ) to 3 ( e )) and a circular arc shape (see FIG. 3 ( f )) such as a triangular shape, a quadrangular shape, a pentagon shape, and a hexagonal shape. From the viewpoint of not applying a load locally when strain is generated and having excellent durability, a ruthenium rubber tube having a substantially arc-shaped cross section is preferable.

The size of the rubber tube is not particularly limited, and for example, a ruthenium rubber tube having an outer diameter of 6 to 20 mm and a thickness of 0.5 to 5 mm is used. When the enamel rubber pipe of this size is used, since the bent portion 3 has a moderate stress, it is possible to realize a hinge which is simply opened by weak force and excellent in use performance. The lower limit of the outer diameter is preferably 7 mm or more, and more preferably 8 mm or more. The upper limit of the outer diameter is preferably 15 mm or less, more preferably 13 mm or less, and particularly preferably 11 mm or less. The lower limit of the thickness is preferably 1 mm or more. The upper limit of the thickness is preferably 3 mm or less, and more preferably 2 mm or less.

The length of the rubber tube is not particularly limited, and is, for example, 10 to 300 mm. The lower limit is preferably 20 mm or more, more preferably 50 mm or more, and particularly preferably 100 mm or more. The upper limit is preferably 200 mm or less, and more preferably 180 mm or less.

The hardness of the ruthenium rubber is not particularly limited, and for example, a ruthenium rubber having a hardness of 10 to 90 is used. The lower limit is preferably 20 or more, more preferably 40 or more, and particularly preferably 50 or more. The upper limit is preferably 80 or less, and more preferably 60 or less. The hardness of the rubber is measured using a type A durometer.

The mass of the first component 1 and/or the second component 2 is less than the stress applied in the direction of closing the first component and the second component in an open state in which the first component 1 and the second component 2 are opened by 180° . Thereby, the effect that the first member and/or the second member are automatically closed when the hand is released can be obtained. In the case where the mass of the first member 1 and/or the second member 2 is less than the stress, the difference between the mass and the stress of the first member 1 and/or the second member 2 is preferably 10 g or more, more preferably 20 g or more, and particularly preferably It is 30g or more. When the difference between the mass and the stress of the first member 1 and/or the second member 2 is set to 10 g or more, the effect of quick closing can be obtained.

Furthermore, the mass of at least one of the first component 1 and/or the second component 2 may be greater than the opening of the first component and the first component in an open state in which the first component 1 and the second component 2 are opened by 180° The stress applied by the direction of the two parts. For example, when the first member 1 and the second member 2 are opened in the open state of 360°, when the member having a large mass is placed thereon, even when the hand is released, the member is pressed according to the mass of the member, thereby maintaining Open state. In the case where the mass of at least one of the first member 1 or the second member 2 is greater than the stress, the difference between the mass and the stress of the member is preferably 10 g or more, more preferably 20 g or more, further preferably 30 g or more, and particularly preferably 50g or more. When the difference between the mass and the stress of the member is set to 10 g or more, the open state can be stably maintained.

The bending force of the bent portion 3 of the present invention in the direction in which the first member 1 and the second member 2 are opened by 180° toward the direction in which the first member 1 and the second member 2 are closed is preferably formed to be 1 to 100 g. Thereby, it is possible to provide a hinge which can be easily opened and used with excellent performance even by weak force. The lower limit of the stress is preferably 5 g or more, more preferably 10 g or more, further preferably 20 g or more, and particularly preferably 25 g or more, from the viewpoint that the opening and closing operation is smooth and the use performance is particularly excellent. On the other hand, the upper limit is preferably 70 g or less, more preferably 50 g or less, further preferably 45 g or less, and particularly preferably 40 g or less.

In addition, the stress measurement method uses the apparatus shown in FIG. The apparatus shown in Fig. 4 is a device which is arranged to be spaced apart from the spacer of the same height as the balance scale and the weighing scale. As shown in FIG. 4, the measuring method is: pressing one member (second member) against the spacer and fixing the other member 1 in a state where the first member 1 and the second member 2 of the hinge 10 are opened by 180°, and the other member is pressed. (The first part) is placed on the weighing pan and the weight of the balance is measured (referred to as the "reaction force"). The stress applied in the direction of closing the first member 1 and the second member 2 is obtained by calculating the difference between the measured reaction force and the mass of the member placed on the weighing pan.

Further, the stress applied in the direction in which the first member 1 and the second member 2 are closed can be adjusted by changing the sectional area, volume, and the like of the ruthenium rubber (refer to FIG. 2). For example, Fig. 5(a) shows the relationship between the reaction force and the sectional area, and Figs. 5(b) and 5(c) show the relationship between the reaction force and the volume. In addition, in any of the test examples, the mass of the first member and the second member were uniform. Fig. 5 (a) is a ruthenium rubber tube obtained by cutting a slit in a 矽 rubber tube having an inner diameter of 9 mm and an outer diameter of 11 mm, and measuring the reaction force of the enamel rubber tube obtained by changing the length to change the cross-sectional area. . Fig. 5 (b) is a ruthenium rubber tube using an inner diameter of 8 mm, an outer diameter of 11 mm, and a length of 140 mm, and measuring a 矽 rubber tube obtained by cutting a slit and a 1/4 rubber section obtained by cutting a section of the cylinder ( The result of the reaction force of the part with an opening angle of 90°. Fig. 5 (c) is a ruthenium rubber tube using an inner diameter of 6 mm, an outer diameter of 8 mm, and a length of 140 mm, and measuring the 矽 rubber tube obtained by cutting the slit and the 1/4 rubber section obtained by cutting the section of the cylinder ( The result of the reaction force of the 矽 rubber tube with an opening angle of 90°. From these results, it is understood that the stress applied in the direction in which the first member 1 and the second member 2 are closed can be adjusted by adjusting the cross-sectional area, the volume, and the like.

The application examples of the hinge of the present invention are listed below.

 <Application Example 1: Smartphone Case>  

The application example 1 shown in FIG. 6 is a smart phone case 100 for protecting a smart phone. The smart phone case 100 includes two flat portions, that is, a first flat portion 101 (first member) covering the liquid crystal screen of the smart phone, and a second flat portion 102 to which the protective object holding portion 104 holding the smart phone is fixed ( Second part). Further, the smart phone case 100 has a bent portion 103 that connects the first flat plate portion 101 and the second flat plate portion 102 in a line shape, and the bent portion 103 can be deformed such that the first flat plate portion 101 and/or the second flat plate portion 102 The direction of the line of the link is rotated in the axial direction.

7 is a cross-sectional view showing a portion of the bent portion 103 of the smartphone casing 100, and FIG. 7(c) is a view showing a state in which the first flat plate portion 101 and the second flat plate portion 102 are respectively abutted against the object to be protected by sandwiching the object to be protected. The state (hereinafter sometimes referred to simply as "closed state (0°)"), and FIG. 7(b) shows an open state in which the first flat plate portion 101 is rotated by 90 degrees from the closed state (0°) (hereinafter sometimes referred to simply as "open state"). (90°)"), FIG. 7(a) shows an open state in which the first flat plate portion 101 is rotated by 180 degrees from the closed state (0°) (hereinafter sometimes simply referred to as "open state (180°)"). The bent portion 103 includes a 矽 rubber tube 105 having an arc shape in cross section, and one end of the 矽 rubber tube 105 is fixed to a plastic (polypropylene (PP)) constituting the first flat portion by an adhesive for a hard-to-adhere material. On the core material 106, the other end is fixed to the core material 106 made of PP which is the same as the second flat plate portion by an adhesive with a hard-to-bond material. Further, both surfaces of the rubber tube 105 are covered with a soft leather surface material 107, so that they cannot be visually recognized from the outside. The 矽 rubber pipe 105 is a ruthenium rubber pipe in which a ruthenium rubber pipe is cut in the longitudinal direction to have an arc shape in cross section, and the state in which the arc is closed is in a state of no strain. Therefore, in the open state (90°) or the open state (180°), the elastic body 105 is strained by the opening of the circular arc, and a stress to be in a closed state (0°) is generated. Further, even in the closed state (0°), the strain of the rubber tube 105 remains, and the force that presses the first flat plate portion 101 and the second flat plate portion 102 together is applied.

(experiment and results)

Using the smartphone case for the iPhone 7 (registered trademark), measure the "reaction force" obtained from a 矽 rubber tube with an arc-shaped cross section.

The rubber tube is made of a rubber tube of the following shape and physical properties.

Thickness: 1 to 2mm

Inner diameter: 6 to 8mm

Outer diameter: 8 to 11mm

Opening angle of the arc: 0 to 90°

Hardness: 54 to 60

Length: 113 to 166mm

As a result of trialing the smart phone case using various enamel rubber tubes having different reaction forces, the reaction state is automatically turned into a closed state (0°) when the reaction force is 10 to 60 g. Further, the mass of the first flat portion in the prototype was 3 g of mass and the stress was 7 to 57 g.

 <Application Example 2: Hand mirror>  

The application example 2 shown in FIG. 8 is a folding hand mirror 200. The hand mirror 200 has a first mirror portion 201 (first member) and a second mirror portion 202 (second member) each having a mirror surface. Further, the hand mirror 200 has a bent portion 203 that connects the first mirror portion 201 and the second mirror portion 202 in a line shape, and the bent portion 203 can be deformed such that the first mirror portion 201 and the second mirror portion 202 are connected in a line direction. As an axial rotation. The bent portion 203 is made of a rubber tube having a substantially arc-shaped cross section (opening angle of 0°). The mass of the first mirror portion 201 and the second mirror portion 202 is designed to be smaller than the stress applied in the direction in which the first mirror portion 201 and the second mirror portion 202 are closed.

This folding hand mirror 200 can be manually opened and automatically closed when the hand is released. Thereby, when the hand mirror 200 is dropped, it can be instantaneously closed, and the damage of the mirror surface can be suppressed.

 <Application Example 3: Business Card Holder>  

The application example 3 shown in FIG. 9 is a business card holder 300. The business card holder 300 has a storage portion 302 (second member) that houses a business card and a card, and a cover portion 301 (first member) that covers the storage portion 302. Further, the business card holder 300 has a bent portion 303 in which the lid portion 301 and the accommodating portion 302 are linearly connected, and the bent portion 303 can be deformed such that the lid portion 301 and the accommodating portion 302 are rotated in the axial direction of the connection. The bent portion 303 is made of a rubber tube having a substantially arc-shaped cross section (opening angle of 0°). Further, in the same manner as the smartphone case of the first application example, a rubber (polypropylene (PP)) core material constituting the first member and the second member is fixed to the rubber tube, and is covered with a soft leather surface material. . The mass of the cover portion 301 is designed to be smaller than the stress applied in the direction of closing the cover portion 301 and the accommodating portion 302, and the mass of the accommodating portion 302 is designed to be larger than the stress.

The business card holder 300 operates to open the cover portion 301 manually, and the cover portion 301 is automatically closed when the hand is released. Thereby, when the business card holder 300 is dropped, the lid portion 301 can be instantly closed, and the flying out of the business card or the like stored in the storage unit 302 can be suppressed.

 <Application Example 4: Coin Purse>  

The application example 4 shown in FIG. 10 is the coin purse 400. The coin purse 400 has a receiving portion 402 (second member) that houses a change or the like, and a lid portion 401 (first member) that covers the accommodating portion 402. Further, the coin purse 400 has a bent portion 403 that linearly connects the lid portion 401 and the accommodating portion 402, and the bent portion 403 can be deformed such that the lid portion 401 and the accommodating portion 402 are rotated in the axial direction of the connection. The bent portion 403 is made of a rubber tube having a substantially arc-shaped cross section (opening angle of 0°). Further, similarly to the smartphone case of the first application example, a rubber (polypropylene (PP)) core material constituting the first member and the second member is fixed to the rubber tube, and the surface material made of soft leather is used. cover. The mass of the lid portion 401 and the accommodating portion 402 is designed to be smaller than the stress applied in the direction in which the lid portion 401 and the accommodating portion 402 are closed.

The coin purse 400 operates to open the lid portion 401 manually, and when the hand is released, the lid portion 401 is automatically closed. Thereby, when the coin purse 400 is dropped, the lid portion 401 can be instantaneously closed, and the flying out of the change or the like stored in the accommodating portion 402 can be suppressed.

 <Application Example 5: Portable Ashtray>  

The application example 5 shown in FIG. 11 is a portable ashtray 500. The portable ashtray 500 has a housing portion 502 (second member) that houses soot or cigarette butts, and a lid portion 501 (first member) that covers the housing portion 502. In addition, the portable ashtray 500 has a bent portion 503 that linearly connects the lid portion 501 and the accommodating portion 502, and the bent portion 503 can be deformed such that the lid portion 501 and the accommodating portion 502 rotate in the axial direction of the joint. . The bent portion 503 is made of a rubber tube having a substantially arc-shaped cross section (opening angle of 0°). Further, similarly to the smartphone case of the first application example, a rubber (polypropylene (PP)) core material constituting the first member and the second member is fixed to the rubber tube, and the surface material made of soft leather is used. cover. The mass of the lid portion 501 and the accommodating portion 502 is designed to be smaller than the stress applied in the direction in which the lid portion 501 and the accommodating portion 502 are closed.

The portable ashtray 500 operates to open the lid portion 501 in a manual manner, and when the hand is released, the lid portion 501 is automatically closed. Thereby, when the portable ashtray 500 is dropped, the lid portion 501 can be instantaneously closed, and the flying out of the soot or the cigarette butt stored in the storage portion 502 can be suppressed.

 <Application Example 6: Kettle>  

Application Example 6 shown in Fig. 12 is a kettle 600. The kettle 600 has a container portion 602 (second member) for storing a drink or the like, and a lid portion 601 (first member) that covers the container portion 602. Further, the kettle 600 has a bent portion 603 that linearly connects the lid portion 601 and the container portion 602, and the bent portion 603 can be deformed such that the lid portion 601 and the container portion 602 are rotated in the axial direction of the joint. The bent portion 603 is made of a rubber tube having a substantially arc-shaped cross section (opening angle of 0°). Further, the enamel rubber pipe is fixed to a fixing plate 604 made of plastic (polypropylene (PP)), and is attached to the lid portion 601 and the container portion 602 via the fixing plate 604. The mass of the cover portion 601 is designed to be smaller than the stress applied in the direction of closing the cover portion 601 and the container portion 602, and the mass of the container portion 602 is designed to be larger than the stress.

The kettle 600 operates to open the lid portion 601 manually, and when the hand is released, the lid portion 601 is automatically closed. Thereby, when the kettle 600 is dropped, the lid portion 601 can be instantaneously closed, and the drinking opening provided at the top of the container portion 602 can be covered, thereby exhibiting an excellent effect of preventing contamination.

 Industrial utilization  

The hinge of the present invention can be preferably used for a protective device for an article which is liable to be broken or broken when dropped, a cover for an article to prevent the contents from flying out when dropped, and an article for preventing hygiene contamination when dropped. Cover and so on. For example, it can be used as a smart phone case, a tablet case, a hand mirror, a business card holder, a card box, a coin purse, a portable ashtray, a lid for a drinking mouth of a kettle or a bottle, a cover covering a nipple, and the like.

Claims (6)

 A hinge having a first member, a second member, and a bent portion, the bent portion joining the first member and the second member in a line shape such that the first member and/or the first portion The two members are axially rotated in a direction of the line of the joint, wherein the bent portion includes a yoke rubber, and the yoke rubber generates strain in an open state in which the first member and the second member are opened. And biasing in a direction to close the first component and the second component, the mass of the first component and/or the second component being less than 180 in the first component and the second component The stress applied in the direction of closing the first member and the second member in the open state of °.    The hinge according to claim 1, characterized in that the mass of at least one of the first member or the second member is greater than the stress.    The hinge according to claim 1, characterized in that the stress is 1 to 100 g.    The hinge according to any one of claims 1 to 3, characterized in that the enamel rubber is composed of a ruthenium rubber tube having a substantially arc-shaped cross section.    The hinge according to claim 4, characterized in that the enamel rubber tube has an outer diameter of 6 to 20 mm and a thickness of 0.5 to 5 mm.    The hinge according to claim 4, characterized in that the opening angle of the approximately circular arc-shaped section is 0 to 90°.