KR20100006762A - Hinge and door assembly using the same - Google Patents

Abstract

PURPOSE: A hinge and a door assembly using the same are provided to completely close a door and to keep the opened angle of the door. CONSTITUTION: A hinge comprises a main body, a housing, and a cam assembly. The housing is formed on one side of the main body and a rotating door and is connected on a rotary shaft. The cam assembly is formed in the inside of the housing. The cam assembly applies the elastic rotary force to the housing toward the direction which a door is closed if the rotary angle of the housing is within the first angle range. The cam assembly applies the frictional force to the housing so that the rotated angle is kept if the rotary angle of the housing is within the second angle range.

Description

Hinge and Door Assembly Using The Same}

The present invention relates to a hinge and a door assembly using the elastic rotation force and friction force acting according to the rotation angle.

In general, the hinge is a component provided on the axis of rotation of a rotating object such as a door to provide a degree of freedom of rotation so that the door can be rotated smoothly.

Such a hinge is generally provided on a rotating shaft such as a door of a home appliance such as a door or a car door and a refrigerator.

However, the conventional hinge as described above has the following problems.

First, when the user does not close the door completely, the door is left open as it is, so there is a risk of safety accidents, or in the case of a refrigerator, there is a problem that the cold air continues to leak.

Second, when the user opens the door, the user pulls the door and releases his hand at the desired position. If the user does not consciously attenuate the rotational inertia, the door is continuously rotated and opened due to inertia, which opens the door unnecessarily and greatly. There is a risk of the refrigerator, there is a problem such as excessive leakage of cold air.

Accordingly, an object of the present invention is to provide a hinge in which the door is completely closed and the opening angle of the door is maintained, and a door assembly using the same.

In order to solve the above problems, according to one embodiment of the present invention, provided on any one side of the main body and the main body and the rotating door, the housing is coupled to the rotating shaft of the door and the inside of the housing, When the rotation angle is within the first angle range, the elastic rotational force is applied to the housing in the direction in which the door is closed, and when the rotation angle of the housing is within the second angle range, the friction force is applied to the housing to maintain the rotated angle. A hinge is provided that includes a cam assembly.

The housing may include one end of the rotating shaft of the door is inserted and a housing body coupled to one opened side of the housing body by forming a predetermined space therein and opening one side thereof.

The cam assembly is a hinge shaft portion coupled to the rotating shaft of the door, a fixed cam fixed to the hinge shaft portion, while rotating relative to the fixed cam according to the rotation of the housing to generate an elastic rotation force or friction force according to the rotation angle A sliding cam, a spring elastically supporting the sliding cam, and the housing rotates with respect to the hinge shaft according to the rotation of the housing. When the rotation angle of the housing is within the second angle range, frictional force is applied between the sliding cam and the hinge shaft portion. It may include an elastic clip to generate.

The fixed cam may include a cylindrical boss having an inclined portion having one side inclined.

The boss of the fixed cam may include an outer boss and an inner boss formed inside the outer boss.

In addition, the inclined portion of the outer boss of the fixed cam and the inclined portion of the inner boss may be arranged in a form facing each other.

The sliding cam may include a boss having an inclined portion formed to incline the other side to slide with the fixed cam inclined portion as the housing rotates.

The boss of the sliding cam may include an outer boss and an inner boss formed inside the outer boss.

The inclined portion of the outer boss of the sliding cam and the inclined portion of the inner boss may be disposed to face each other.

When the rotation angle of the housing is within the first angle range, the inclined portion of the fixed cam and the inclined portion of the sliding cam may contact each other.

In addition, when the rotation angle of the housing is within the first angle range, an elastic rotation force may be generated to rotate in the direction in which the door is closed by riding the inclined portion of the fixed cam by the support force of the spring. .

In addition, the boss of the fixed cam may be formed with a horizontal portion made of one side is horizontal, the boss of the sliding cam may be formed with a horizontal portion made of the other side is horizontal.

In addition, when the rotation angle of the housing is within the second angle range, the horizontal portion of the sliding cam and the horizontal portion of the fixed cam may be rubbed with each other by the bearing force of the spring to generate a friction force.

The elastic clip is spaced apart from the outer circumferential surface of the hinge shaft part when the rotation angle of the housing is within the first angle range, and is contacted with the outer circumferential surface of the hinge shaft part when the rotation angle of the housing is within the second angle range. It can be made to have a clip portion in which the frictional force is generated.

In addition, the clip portion may be one side is opened to have an elastic force.

In addition, the elastic clip may be formed by overlapping a plurality of clip pieces.

In addition, a portion of the hinge shaft portion contacting the clip portion of the elastic clip has a cross section whose distance from the center point to the outer circumferential surface is not constant so that the distance from the inner circumferential surface of the clip portion of the elastic clip varies according to the rotation of the elastic clip. It can be made to.

A rotation limiter may be further provided to prevent the sliding cam from rotating more than a predetermined angle with respect to the fixed cam.

The hinge shaft part may include a hinge shaft provided inside the housing and one end of the hinge shaft and a shaft holder coupled to a rotation shaft of the door.

In addition, a protrusion may be formed on the shaft holder, and a limiting protrusion may be formed inside the housing to contact the protrusion of the shaft holder and limit the rotation of the housing according to the rotation of the housing.

On the other hand, according to another aspect of the present invention, the main body, the door that rotates with respect to the main body, provided on any one of the main body or the door, the rotational force in the direction in which the door is closed when the rotation angle of the door is within the first angle range There is provided a door assembly comprising a hinge which is elastically applied and a frictional force is applied to maintain the rotated angle when the rotation angle of the door is within the second angle range.

According to the door of the present invention and the door assembly using the same have the following effects.

First, when the rotation angle of the housing is within the first angle range, the sliding cam is rotated and closed in the direction in which the door is closed, so that the door is closed even if the user inadvertently closes the door.

Second, when the rotation angle of the housing is within the second angle range, friction force is generated between the hinge shaft and the elastic clip and between the sliding cam and the fixed cam, so that the inertia force is attenuated when the user opens the door, thereby opening the door. Has the effect of being maintained.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of this embodiment, the same name and the same reference numerals are used for the same configuration and additional description thereof will be omitted.

The hinge according to an embodiment of the present invention may be made by including a housing and a cam assembly, as shown in FIGS.

Prior to description, reference numeral 40 of FIG. 1 is a fixing bracket and may be coupled to a main body or a door that rotates with respect to the main body. In addition, reference numeral 60 is a rotating bracket, which is provided on the other side of the main body or the door to which the fixed bracket 40 is installed is provided to rotate with respect to the fixed bracket 40. In the description of the present embodiment, the fixing bracket 40 is provided on the main body, and the rotating bracket 60 is provided on the door.

In addition, the main body and the door may be a door of an automobile and a vehicle, or may be a main body and a door of furniture or home appliances.

The housing 110 may include a housing body 112 and a housing cover 114. The housing body 112 is provided on any one side of the main body and the door that rotates with respect to the main body, is coupled to the fixed shaft 42 formed from the fixed bracket 40 and formed to form a predetermined space therein. In addition, the housing body 112 has the components described below in the internal space, it may be formed so that one side is opened for convenience of assembly.

In addition, the housing cover 114 may be configured to close one open side of the housing body 112. In addition, the housing cover 114 is formed with a through hole through which the end of the hinge shaft portion 120 coupled with the fixed shaft 42 is inserted or penetrated at one side thereof, and the other side of the housing body 112. Protrusions 116 are formed to protrude to extend into space.

The cam assembly applies an elastic rotational force to the housing 110 in a direction in which the door is closed when the rotation angle of the housing 110 is within the first angle range, and the rotation angle of the housing 110 is a second angle. When in the range is made to apply a friction force to the housing 110 so that the rotated angle is maintained.

In the present embodiment, the first angle range is exemplified as being within 45 degrees in the direction in which the door is opened in the closed state. In addition, the second angle range illustrates that the rotation angle of the door is within a range of opening up to 150 degrees out of the first angle range. That is, the first angle range is 0 degrees to 45 degrees, and the second angle range is 45 degrees to 150 degrees. However, the first angle range and the second angle range are not limited to the above angles and may be set differently from those illustrated.

Such a cam assembly may include a hinge shaft part 120, a fixed cam 130, a sliding cam 140, a spring 150, and an elastic clip 160.

The hinge shaft part 120 may include a hinge shaft 122 and a shaft holder 124.

As shown in FIG. 3, the hinge shaft 122 is provided inside the housing body 112 and is fixed to the fixed shaft 42 to maintain a fixed position even when the housing 110 rotates. It is provided to be.

In addition, the other end of the end coupled to the shaft holder 124 of the hinge shaft 122 is inserted into the through hole of the housing cover 114, the end is exposed to the outside and the exposed end is fixed by the fixing clip 170 The groove 129 is formed to be fixed.

The shaft holder 124 is a component that couples the hinge shaft 122 and the fixed shaft 42 to each other, and grooves are formed at both sides thereof, and one of the grooves at one side thereof is coupled to the fixed shaft 42. And the other side may be made so that the hinge shaft 122 is coupled. In this case, the fixed shaft 42 and the hinge shaft 122 may be formed to have a cross section 128 having a shape other than a circular shape so that the fixed shaft 42 and the hinge shaft 122 are not rotated with respect to the shaft holder 124. In addition, the groove of the shaft holder 124 may also be formed to correspond to the cross-sectional shape of the fixed shaft 42 and the hinge shaft 122.

In addition, as shown in FIG. 4, the protrusion 125 protrudes from the circumference of the shaft holder 124. In addition, the inner circumferential surface of the housing 110 is formed with a limiting protrusion 118 at a predetermined angle so as to contact the protrusion 125 to limit the rotation of the shaft holder 124 when the shaft holder 124 rotates. Can be. The limiting protrusion 118 as described above may be formed to contact the protrusion 125 of the shaft holder 124 when the door is opened to the maximum, that is, rotated at an angle of 150 degrees.

The fixed cam 130 is a component fixed to the hinge shaft 122 is fixed. As shown in FIG. 5, the fixed cam 130 extends toward the housing cover 114 around the first through hole 139 through which the hinge shaft 122 penetrates and the first through hole 139. The boss portion is formed to be formed to be.

The boss may be formed in a circular shape, and a plurality of bosses may be formed of the first boss 131 and the third boss 135. The third boss 135 may be formed to have concentricity inside the first boss 131.

The first boss 131 may include a first inclined portion 132 and a first horizontal portion 133.

The first inclined portion 132 may be formed by inclining an upper surface of the first boss 131. In addition, the first horizontal portion 133 is formed in a horizontal direction when the first inclined portion 132 ends.

The third boss 135 may also include a third inclined portion 136 and a third horizontal portion 137 similar to the first boss 131.

At this time, the third inclined portion 136 and the third horizontal portion 137 of the third boss 135 may have the first inclined portion 132 and the first horizontal portion 133 of the first boss 131. It is preferable to arrange in the form facing ().

In addition, the first inclined portion 132 of the first boss 131 and the third inclined portion 136 of the third boss 135 may be formed to have a length corresponding to the first angle range. In addition, the first horizontal portion 133 of the first boss 131 and the third horizontal portion 137 of the third boss 135 may be formed to have a length corresponding to the second angle range.

In addition, as shown in FIG. 3, a flange 126 having a non-circular shape is formed on the hinge shaft 122 so that the fixed cam 130 is not rotated with respect to the hinge shaft 122. As shown in FIG. 6, a stepped groove 139b corresponds to the shape of the flange 126 so that the flange 126 may be inserted into the opposite side of the boss portion of the fixed cam 130 which contacts the 126. This can be formed.

As shown in FIG. 7, the sliding cam 140 has a second through hole 149 through which the hinge shaft 122 penetrates and a third through hole through which the protrusion of the housing cover 114 penetrates. 149b) and a boss formed to abut against the boss of the fixed cam 130 around the second through hole 149. The sliding cam 140 is provided to be slidable in the longitudinal direction of the hinge shaft 122 and the protrusion 116 in accordance with the rotation of the housing 110.

The boss of the sliding cam 140 may be formed in a circular shape so as to correspond to the boss of the fixed cam 130, and the second boss 141 and the second boss 141 may be formed to have concentricity inside the second boss 141. It may consist of four bosses 145.

The second boss 141 may have a shape corresponding to the first boss 131, and may include a second inclined part 142 and a second horizontal part 143.

The second inclined portion 142 may be formed by inclining an upper surface of the second boss 141 to have an inclination and a length corresponding to the first inclined portion 132 of the fixed cam 130. In addition, the second horizontal portion 143 may be formed to have a plane parallel to the first horizontal portion 133 at the point where the second inclined portion 142 ends.

In addition, similar to the second boss 141, the fourth boss 145 may also have a fourth inclined portion 146 and the third horizontal portion 137 having a shape and a length corresponding to the third inclined portion 136. It may be made to include a fourth horizontal portion 147 parallel to.

At this time, the fourth inclined portion 146 and the fourth horizontal portion 147 of the fourth boss 145 are the second inclined portion 142 and the second horizontal portion 143 of the second boss 141. It is preferably arranged in the form facing the.

As shown in FIG. 2, the spring 150 is provided between the sliding cam 140 and the housing cover 114 to elastically support the sliding cam 140. That is, the spring 150 is provided to push the sliding cam 140 in the direction of the fixed cam 130 elastically.

In addition, the elastic clip 160 is a component that attenuates the rotational force of the door by applying a friction force to the hinge shaft 122 when the housing 100 is rotated within the second angle range.

As shown in FIG. 8, the elastic clip 160 as described above includes a clip portion 122 formed to position the hinge shaft 122 on one side, and a protrusion 116 of the housing cover 114 on the other side. ) Is inserted through hole 164 is formed. Therefore, the elastic clip 160 is rotated together with the housing 100.

The clip part 122 is spaced apart from an outer circumferential surface of the hinge shaft 122 when the rotation angle of the housing 100 is within the first angle range, and the rotation angle of the housing 100 is within the second angle range. In this case, it is provided in contact with the outer circumferential surface of the hinge shaft 122 to generate a friction force.

To this end, the portion 128 of the hinge shaft 122 located in the clip portion has a distance from the center to the outer circumferential surface such that a distance from the inner circumferential surface of the elastic clip 160 varies according to the rotation of the elastic clip 160. It is preferable that it is formed to have a non-uniform cross section. That is, as shown in FIG. 3, both sides far from the center may be rounded and the remaining portion shorter from the center may have a flat cross section.

In addition, the clip portion 122 in which the hinge shaft 122 is positioned is also preferably formed in the form of a long elongated groove to one side, not circular.

Therefore, when the housing 100 is within the first angle range, both side portions of the hinge shaft 122 are positioned at the long portions of the clip portion 122 such that the hinge shaft 122 and the elastic clip 160 are disposed. Since the friction force does not occur due to no contact, and the housing 100 is within the second angle range, both side portions of the hinge shaft 122 touch the short portions of the clip portion 122 to generate friction force. At this time, since both sides of the hinge shaft 122 are formed to be round, the elastic clip 160 and the housing 100 may be smoothly rotated even when frictional force is generated.

In addition, one side of the clip portion 122 may be opened such that both sides of the hinge shaft 122 contact the inner circumferential surface of the clip portion 122 so that the friction force acts elastically. Therefore, the clip part 122 can be moved finely by the elasticity of the material so that the friction force is elastically applied.

In addition, the elastic clip 160 may be formed by overlapping a plurality of clip pieces 168 of a thin plate shape. Therefore, even if some of the plurality of clip pieces 168 are broken, the function can be performed as the remaining clip pieces 168.

Hereinafter, a process of operating the hinge 100 according to the present embodiment will be described.

9 to 16 illustrate a state in which the hinge 100 according to the present embodiment is rotated as the door is opened, and the housing body 112 is deleted for convenience of description.

The hinge 100 according to the present embodiment maintains a state as shown in FIGS. 9 and 10 when the door is closed. That is, since the sliding cam 140 and the fixed cam 130 is located in the initial position, the elastic force to rotate the door does not work, and the inner circumferential surfaces of the hinge shaft 122 and the elastic clip 160 are spaced apart from each other. Friction force that attenuates the torque does not work.

When the user rotates the door to open the door in the state shown in FIG. 10, the hinge 100 rotates as shown in FIGS. 11 and 12. 11 and 12 illustrate a state in which the hinge 100 is rotated within a first angle range.

When the door is rotated in the opening direction, the housing 110 is also rotated accordingly, and the sliding cam 140 provided inside the housing 110 is also rotated around the hinge shaft 122.

As the sliding cam 140 is rotated, the second inclined portion 142 of the second boss 141 of the sliding cam 140 and the fourth inclined portion 146 of the fourth boss 145 are fixed to the fixed cam. Rotating in the first inclined portion 132 of the first boss 131 and the third inclined portion 136 of the third boss 135 of the 130 and ascending toward the housing cover 114, the spring 150 ) Will be compressed.

On the other hand, since the compressed spring 150 elastically supports the sliding cam 140 toward the fixed cam 130, the sliding cam 140 is the first inclined portion 132 of the fixed cam 130 And while descending toward the fixed cam 130 along the third inclined portion 135, the rotational force to rotate in the direction of closing the door acts on the housing 110.

Therefore, if there is no external force to open the door in the above state, the door is closed by rotating in the direction in which the door is closed by the sliding cam 140 to be rotated by the spring 150.

In this case, a plurality of bosses of the fixed cam 130 are formed of the first boss 131 and the third boss 135, and the bosses of the sliding cam 140 are also the second boss 141 and the fourth boss. By forming a plurality of (145), the stress applied to the boss portion is dispersed can be operated the hinge 100 more smoothly.

In addition, since the first boss 131 and the third boss 135 and the second boss 141 and the fourth boss 145 are disposed to face each other, the sliding cam 140 is inclined to one side. It can be operated stably because it is not supported.

In addition, as shown in FIG. 13, the outer circumferential surface of the hinge shaft 122 and the inner circumferential surface of the elastic clip 160 are spaced apart from each other so that no frictional force is generated.

Meanwhile, when the opening angle of the door is rotated out of the first angle range to the second angle range, the hinge 100 rotates as shown in FIGS. 14 to 16. 14 and 16 illustrate a state in which the hinge 100 is rotated in a second angle range.

When the door is further opened and the housing 110 rotates in the second angle range, the sliding cam 140 provided inside the housing 110 also rotates around the hinge shaft 122 to fix the fixed cam ( The second inclined portion 132 and the third inclined portion 136 are rotated while being rotated, so that the second horizontal portion 143 and the fourth horizontal portion 147 of the sliding cam 140 are fixed cams. The first horizontal portion 133 and the third horizontal portion 137 of 130 are in contact with.

At this time, since it is pushed toward the fixed cam 130 by the elastic force of the spring 150 of the sliding cam 140, the second horizontal portion 143 and the fourth horizontal portion 147 of the sliding cam 140. ) Is in close contact with the first horizontal portion 133 and the third horizontal portion 137 of the fixed cam 130 to generate a friction force.

In addition, as shown in FIG. 16, the outer circumferential surface of the hinge shaft 122 and the inner circumferential surface of the elastic clip 160 are rubbed to generate a frictional force, which attenuates the rotational force of the housing 100.

Therefore, the frictional force attenuates the rotational inertia force applied to the door to maintain the open angle of the door.

In addition, when the door is opened to a limit that can be opened, the protrusion 125 of the shaft holder 124 abuts the limiting protrusion 118 of the housing 110 to limit the rotation of the housing 110. This prevents the door from opening anymore.

As described above, the preferred embodiments of the present invention have been described, and the fact that the present invention can be embodied in other specific forms in addition to the above-described embodiments without departing from the spirit or scope thereof has ordinary skill in the art. It is obvious to them. Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

1 is a perspective view showing a hinge according to an embodiment of the present invention;

2 is an exploded perspective view of FIG. 1;

3 is a perspective view of the hinge shaft of FIG. 2;

4 is a cross-sectional view of FIG. 1;

5 is a perspective view of the fixed cam of Figure 2;

6 is a perspective view illustrating a bottom surface of the fixed cam of FIG. 2;

7 is a perspective view of the sliding cam of FIG.

8 is a perspective view of the elastic clip of FIG.

9 is a cross-sectional view showing a cross section of the hinge shaft and the elastic clip is coupled;

10 is a perspective view showing a state in which the hinge of FIG. 1 is not rotated;

11 is a perspective view illustrating a state in which the hinge of FIG. 1 is rotated within a first angle range;

12 is a front view of FIG. 11;

13 is a cross-sectional view showing a state of the hinge shaft and the elastic clip of FIG.

14 is a perspective view showing a state in which the hinge of FIG. 1 is rotated within a second angle range;

15 is a front view of FIG. 14; And,

16 is a cross-sectional view showing a state of the hinge shaft and the elastic clip of FIG.

<Description of the symbols for the main parts of the drawings>

40: fixed bracket 42: fixed shaft

60: rotating bracket 100: hinge

110: housing 112: housing body

114: housing cover 116: protrusion

120: hinge shaft portion 122: hinge shaft

124: shaft holder 130: fixed cam

131: first boss 132: first slope

133: first horizontal portion 135: third boss

136: third inclined portion 137: third horizontal portion

139: first through hole 140: sliding cam

141: Second Boss 142: Second Inclination

143: second horizontal portion 145: fourth boss

146: fourth slope 147: fourth horizontal portion

149b: third through hole 150: spring

160: elastic clip 162: clip portion

164: through hole 168: clip

170: fixed clip

Claims (21)

A housing provided on one side of the main body and the main body and the rotating door, the housing coupled to the rotating shaft of the door; And It is provided inside the housing, when the rotation angle of the housing is within the first angle range and the elastic rotational force acting on the housing in the direction in which the door is closed, rotated when the rotation angle of the housing is within the second angle range A cam assembly for applying a frictional force to the housing such that the angle is maintained; Hinge made including. The method of claim 1, The housing, One end of the rotating shaft of the door is inserted, the housing body has one side opened by forming a predetermined space therein; And A housing cover coupled to an opened side of the housing body; Hinge comprising a. The method of claim 1, The cam assembly, A hinge shaft part coupled to the rotating shaft of the door; A fixed cam fixed to the hinge shaft; A sliding cam that rotates with respect to the fixed cam according to the rotation of the housing and generates an elastic rotational force when the rotation angle of the housing is within a first angle range; A spring that elastically supports the sliding cam; And An elastic clip which rotates with respect to the hinge shaft according to the rotation of the housing, and generates a friction force between the hinge shaft portion when the rotation angle of the housing is within a second angle range; Hinge comprising a. The method of claim 3, The fixed cam, The hinge, characterized in that it comprises a cylindrical boss formed with an inclined portion formed inclined one side. The method of claim 4, wherein The boss of the fixed cam is a hinge, characterized in that it comprises an outer boss, and an inner boss formed inside the outer boss. The method of claim 5, Hinge, characterized in that the inclined portion of the outer circumferential boss and the inclined portion of the inner circumferential boss face each other. The method of claim 4, wherein The sliding cam, And a boss having an inclined portion formed to be inclined at the other side to slide with the fixed cam inclined portion as the housing rotates. The method of claim 7, wherein The hinge of the sliding cam comprises an outer boss and an inner boss formed inside the outer boss. The method of claim 8, Hinge, characterized in that the inclined portion of the outer circumferential boss and the inclined portion of the inner circumferential boss face each other. The method of claim 7, wherein When the rotation angle of the housing is within the first angle range, And the inclined portion of the fixed cam and the inclined portion of the sliding cam come into contact with each other. The method of claim 7, wherein When the rotation angle of the housing is within the first angle range, And a spring force is generated by the support force of the spring to cause the sliding cam to rotate in the direction in which the door closes the inclined portion of the fixed cam. The method of claim 7, wherein The boss of the fixed cam is formed with a horizontal portion consisting of one side horizontally, The boss of the sliding cam is a hinge, characterized in that the other side is formed horizontally formed horizontal. The method of claim 12, When the rotation angle of the housing is within the second angle range, And the horizontal portion of the sliding cam and the horizontal portion of the fixed cam are rubbed with each other by the bearing force of the spring to generate frictional force. The method of claim 3, The elastic clip, When the rotation angle of the housing is within the first angle range is spaced apart from the outer circumferential surface of the hinge shaft portion, if the rotation angle of the housing is in the second angle range, the clip portion is in contact with the outer circumferential surface of the hinge shaft portion to generate a friction force Hinge characterized by having. The method of claim 14, The clip portion is characterized in that the one side is opened to have an elastic force. The method of claim 14, The elastic clip is a hinge, characterized in that a plurality of clip pieces overlap. The method of claim 14, The hinge shaft portion may be in contact with the clip portion of the elastic clip has a cross-section in which the distance from the center point to the outer circumferential surface is not constant so that the distance from the inner peripheral surface of the clip portion of the elastic clip is changed according to the rotation of the elastic clip. Hinge. The method of claim 3, And a rotation limiting part for preventing the sliding cam from being rotated by a predetermined angle with respect to the fixed cam. The method of claim 3, The hinge shaft portion, A hinge shaft provided inside the housing; And A shaft holder coupled to one end of the hinge shaft and coupled to a rotating shaft of the door; Hinge comprising a. The method of claim 19, Protrusions are formed on the shaft holder, And a limiting protrusion is formed inside the housing to contact the protrusion of the shaft holder and limit the rotation of the housing according to the rotation of the housing. main body; A door rotating relative to the body; The main body is provided on any one side of the door, the rotational force is elastically applied in the direction in which the door is closed when the rotation angle of the door is within the first angle range, A hinge to which frictional force is applied to maintain the rotated angle when the rotation angle of the door is within a second angle range; Door assembly comprising a.

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