KR20210157600A - Damper apparatus of door) - Google Patents

Abstract

The present invention relates to a damper device for a door. A door damper device according to one aspect of the present invention, absorbing an impact to a door opened and closed within a frame in a hinged manner, comprises: a case disposed on an inner surface of the frame and having a hole formed on the lateral surface thereof; an arm disposed in the case, rotating about a rotary shaft according to opening and closing of the door, and including a first arm, a second arm, and a third arm; a roller disposed at an end of the first arm to slide-move on an inner surface of the door according to opening and closing of the door; an elastic member connected to an end of the second arm and selectively providing an elastic force according to opening and closing of the door; and a damper including a gear unit gear-engaged with the third arm and a rod compressed and extended with respect to a cylinder according to movement of the gear unit. The present invention enables a user to easily open the door.

Description

Damper device for door {DAMPER APPARATUS OF DOOR}

This embodiment relates to a damper device for a door.

In general, a plurality of doors are installed in a residential building or an office to improve space division and convenience.

Such a door is mainly divided into a sliding door type and an opening type method, and an appropriate method is selected and installed according to the situation and structure, and is used as an entrance in a divided space in the room.

In the above-described opening/closing method of the door, the door frame and the door are fastened with a hinge, and when the door is rotated in the door frame, the hinge is folded to open or close the door.

In a door that rotates around a hinge in such a door frame, a gap between the door frame and the door is generated when the door is opened, and when the door is closed, the gap narrows as the door rotates and the door and the door frame are in close contact. is the structure

In particular, a child or a child puts a part of the body, such as a hand or foot, into the gap that occurs when the door is opened. can

Therefore, in the prior art, in order to prevent safety accidents occurring in the gaps and spaces of the door, various types of door jamming prevention means and buffer means have been developed and released.

As a prior art document related to such a device for preventing jamming of a door, there is an invention titled 'Anti-trap safety device installed on a hinge of an existing door' in Korean Patent Registration No. 10-1931961.

The above-described prior invention is to have a safety function to prevent a safety accident due to being caught in a door gap while using the door and hinge installed in the existing door frame as it is.

And as another prior art document, the title of the invention of Korean Patent No. 10-1981743, 'Safety device for hinged door', is installed on the front and back of the hinge connecting the hinged door and the door frame, so that a part of the body is attached to the hinge. By fundamentally preventing safety accidents such as bumping or being caught in a hinge, it is possible to further improve safety in use.

However, when the above-described conventional door jamming prevention device is installed on an existing door, compatibility between the existing door and the trapping prevention device is low. Due to the protruding blocking screen

There was a problem that visually the interior effect was significantly lowered.

The present invention has been proposed to improve the above problems, and it is to provide a damper device for a door that can absorb shock and noise generated when opening and closing a hinged door, and can prevent hand jamming.

A door damper device according to the present embodiment is a door damper device for absorbing the impact of a door opened and closed in a frame by opening and closing method, the door damper device comprising: a case disposed on an inner surface of the frame and having a hole formed on the side thereof; an arm disposed in the case, rotating about a rotation axis according to opening and closing of the door, and including a first arm, a second arm, and a third arm; a roller disposed at an end of the first arm to slide and move an inner surface of the door according to opening and closing of the door; an elastic member connected to the end of the second arm and selectively providing elastic force according to the opening and closing of the door; and a damper including a gear part geared to the third arm and a rod compressed and extended with respect to the cylinder according to the movement of the gear part.

Through this embodiment, when the door is opened, the elastic force of the elastic member is provided so that the user can easily open the door, and when the door is closed, an accident such as a user's hand pinch can be prevented in advance by the damping force of the damper.

1 is a perspective view showing a door and a frame according to a first embodiment of the present invention.
2 is a perspective view of a damper device for a door according to a first embodiment of the present invention;
3 is a perspective view showing the configuration of a damper device for a door according to a first embodiment of the present invention.
4 is a plan view of a damper device for a door according to an embodiment of the present invention.
5 to 13 are views for explaining the operation of the damper device for a door according to the first embodiment of the present invention.
14 is a plan view of a door damper device according to a second embodiment of the present invention.
15 is a plan view showing the configuration of a damper device for a door according to a second embodiment of the present invention.
16 to 22 are views for explaining the operation of the damper device for a door according to the second embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described with reference to exemplary drawings. In describing the reference numerals for the components of each drawing, the same components are denoted by the same reference numerals as much as possible even if they are displayed on different drawings.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is 'connected', 'coupled' or 'connected' to another component, the component may be directly connected, coupled, or connected to the other component, but the component and the other component It should be understood that another element may be 'connected', 'coupled' or 'connected' between elements.

1 is a perspective view showing a door and a frame according to a first embodiment of the present invention, FIG. 2 is a perspective view of a door damper device according to a first embodiment of the present invention, and FIG. 3 is a first embodiment of the present invention It is a perspective view showing the configuration of a damper device for a door according to an example, and FIG. 4 is a plan view of the damper device for a door according to an embodiment of the present invention.

1 to 4 , the damper device 100 for a door according to an embodiment of the present invention may be coupled to a frame 20 and a door 10 , respectively. The frame 20 is disposed outside the door 10 to form a space in which the door 10 is disposed. The frame 20 may be fixed to a wall, which is an installation area of the door 10 . For example, the frame 20 may have an upper end coupled to a ceiling surface and a lower end coupled to the floor surface.

The door 10 may be opened and closed in an opening/closing manner. The door 10 may be rotated about the hinge shaft 30 inside the frame 20 to open and close the inner space of the frame 20 .

The damper device 100 for the door absorbs the shock applied when the door 10 is closed and allows the door 10 to close smoothly, thereby preventing noise and shock. The door damper device 100 may include a case 101 , an arm 110 , a link 130 , an elastic member 140 , a damper 150 , a roller 118 , and a bracket 190 . .

The case 101 may be disposed on the inner surface of the frame 20 . For example, the case 101 may be disposed on the upper surface of the inner side of the frame 20 . The case 101 may be screwed to the inner surface of the frame 20 . The case 101 may be formed by combining the first case 101a and the second case 101b. Alternatively, the case 101 may be formed as a single unit body. A hole 107 may be formed in a side surface of the case 101 so that at least a portion of the arm 110 passes therethrough.

A space for accommodating the arm 110 , the link 130 , the elastic member 140 , and the damper 150 may be formed inside the case 101 .

The inside of the case 101 may be partitioned into different spaces. For example, the case 101 includes a first space in which the elastic member 140 is disposed, a second space in which the damper 150 is disposed, and a third space in which the arm 110 is disposed. can do. Among them, the first space portion and the second space portion may be partitioned from other regions through the partition wall 103 , respectively. For example, a first space portion disposed between the plurality of partition walls 103 is disposed in a first area of the case 101 , and disposed between the plurality of partition walls 103 in a second area of the case 101 . A second space portion may be disposed.

The first space portion may be disposed closer to the door 10 than the second space portion.

The arm 110 is configured to be rotated according to the opening and closing of the door 10 , and a part is disposed in the case 101 , and the other part penetrates the hole 107 to the outside of the case 101 . can be placed in

The arm 110 may rotate about a rotation shaft 113 . One or both ends of the rotation shaft 113 may be coupled to the inner surface of the case 101 to form a rotation center of the arm 110 . A bearing (not shown) may be coupled to the rotation shaft 113 to support rotation of the arm 110 .

The arm 110 may include a first arm 112 , a second arm 114 , and a third arm 116 . The first arm 112 , the second arm 114 , and the third arm 116 may be formed as one body. The third arm 116 may be disposed perpendicular to the first arm 112 or the second arm 114 , and the cross-sectional shape of the arm 110 may have an approximately “T” shape. The third arm 116 may be bent inwardly to extend from a boundary region between the first arm 112 and the second arm 114 . The rotation shaft 113 may be coupled to a boundary region between the first arm 112 and the second arm 114 or one end of the third arm 116 adjacent to the boundary region.

At least a portion of the first arm 112 may protrude to the outside of the case 101 through the hole 107 . A roller 118 rotating with respect to the first arm 112 may be disposed at an end of the first arm 112 protruding to the outside of the case 101 . According to the opening and closing of the door 10 , the roller 118 may slide on the inner surface of the door 10 to be accommodated in a bracket 190 to be described later or may be separated from the bracket 190 .

The second arm 114 may be disposed to face the first arm 112 with respect to the rotation shaft 113 . The second arm 114 may be disposed parallel to the first arm 112 in a straight direction, but the present invention is not limited thereto, and the second arm 114 is inclined at a predetermined angle with respect to the first arm 112 . can be placed. An end of the second arm 114 may be hinged with one end of the link 130 . An angle formed by the second arm 114 and the link 130 may change according to the rotation of the arm 110 .

The third arm 116 may be bent inwardly from a boundary region between the first arm 112 and the second arm 114 . The third arm 116 may be formed in a shape in which the cross-sectional area increases toward the inside. The cross-sectional shape of the third arm 116 may be a fan shape. A first gear 117 may be formed at an end of the third arm 116 . An end of the third arm 116 may be connected to the damper 150 . The third arm 116 may be gear-coupled to the damper 150 .

The damper 150 may be disposed in the second space in the case 101 . The damper 150 may be disposed inside the arm 110 . The damper 150 may be disposed inside the elastic member 140 .

The damper 150 may be driven in various ways including a hydraulic method, a pneumatic method, and a spring method. The damper 150 includes a cylinder, a rod 152 that is installed to be extendable with respect to the cylinder, and is coupled to an end of the rod 152 and is installed to be extendable with respect to the cylinder together with the rod 152 . It may include a gear unit 154 . The cylinder, the rod 152 and the gear unit 154 may be arranged side by side in the longitudinal direction.

A second gear 156 may be disposed on one side of the gear unit 154 . The second gear 156 may be disposed on an outer surface of the gear unit 154 facing the first gear 117 . The second gear 156 may mesh with the first gear 117 . Accordingly, when the arm 110 is rotated according to the opening and closing of the door 10 , the rod 152 and the gear unit 154 together with the third arm 116 may move.

An escape groove 106 for accommodating at least a portion of the gear unit 154 when the door 10 is opened may be formed on the inner surface of the case 101 to be recessed than other regions. When the door 10 is opened, the rod 152 is maximally extended with respect to the cylinder, so that the end of the gear unit 154 may come into contact with the inner surface of the case 101 . Accordingly, the escape groove 106 is formed on the inner surface of the case 101 to secure a wide movement area of the gear unit 154 . When the door 10 is opened, the end of the gear unit 154 may contact the bottom surface of the escape groove 106 .

A guide rail 108 for guiding the movement of the gear unit 154 may be formed on the inner surface of the case 101 . For example, the guide rail 108 may be a protrusion protruding from the inner surface of the case 101 . In addition, a groove may be formed in a side surface of the gear unit 154 so that the protrusion slides. As another example, the guide rail may be a groove that is recessed compared to other regions of the inner surface of the case 101 . In addition, a protrusion may be formed on a side surface of the gear unit 154 to slide along the groove. According to the structure as described above, the gear unit 154 may slide the guide rail.

According to the opening and closing of the door 10 , the rod 152 may be expanded or compressed with respect to the cylinder. For example, when the door 10 is opened, the length of the rod 152 protruding from the cylinder may be increased according to the counterclockwise rotation of the arm 110 . When the door 10 is closed, the length of the rod 152 protruding from the cylinder may be shortened according to the clockwise rotation of the arm 110 .

In the second space in which the damper 150 is disposed, a buffer part 158 (refer to FIG. 6 ) having one end supported on the inner surface of the case 101 and the other end supporting the bottom surface of the cylinder may be disposed. have. The buffer 158 may include a spring or a leaf spring. Accordingly, the vibration of the damper 150 generated according to the movement of the rod 152 in the second space can be elastically absorbed.

The damper 150 may be a compression damper that absorbs energy when the rod 152 is compressed. Accordingly, when the rod 152 is extended according to the opening of the door 10 , the rod 152 may be freely extended without attenuation. However, a damping force may be provided when the rod 152 is compressed according to the closing of the door 10 .

The elastic member 140 may be disposed in the first space in the case 101 . The elastic member 140 may include a pressing part 141 and a spring 142 . The pressing part 141 may be hinged to the other end of the link 130 . One end of the spring 142 may be coupled to the inner surface of the case 101 , and the other end may be coupled to the pressing part 141 . A coupling part may be provided on an inner surface of the case 101 and an end of the pressing part 141 to facilitate coupling of the spring 142 .

When the arm 110 is rotated according to the opening and closing of the door 10 , the pressing part 141 moves in a direction to compress the spring 142 or by the elastic force of the spring 142 extending. It can move to press the link 130 .

Specifically, when the door 10 is opened, the pressing unit 141 presses the link 130 through the elastic force of the spring 142 to rotate the arm 110 . When the door 10 is closed, by rotation of the arm 110 , the pressing part 141 may press the spring 142 in a direction in which the spring 142 is compressed.

When the pressing part 141 is moved according to the elastic force of the spring 142 , the elastic member 140 rotates the arm 110 so that the door 10 can be opened without a user's external force.

The bracket 190 may be disposed on the inner surface of the door 10 . The bracket 190 may accommodate the roller 118 or separate the accommodated roller 118 according to the opening and closing of the door 10 . To this end, an opening 194 through which the roller 118 is drawn in or drawn out according to the opening and closing of the door 10 may be formed on a side surface of the bracket 190 . The bracket 190 may be disposed on the inner surface of the door 10 to form the same height as the case 101 .

A guide rail 192 may be formed on the inner surface of the door 10 adjacent to the opening 194 through which the roller 118 enters and exits. The guide rail 192 may be formed integrally with the bracket 190 . A rail may be formed on the outer surface of the guide rail 192 so that the roller 118 can slide easily. The rail may be a groove or a protrusion formed on the outer surface of the guide rail 192 .

One end of the link 130 may be hingedly coupled to the pressing part 141 , and the other end may be hingedly coupled to the second arm 114 . According to the rotation of the arm 110 , the angle formed by the link 130 and the second arm 114 and the angle formed by the link 130 and the pressing part 141 may vary. .

Hereinafter, an operation of the door damper device 100 according to the present embodiment will be described.

4 to 13 are views for explaining the operation of the damper device for a door according to the first embodiment of the present invention.

4 to 9 are views illustrating a state in which the door is opened, and FIGS. 10 to 13 are views illustrating a state in which the door is closed.

Referring to FIG. 4 , when the door 10 is initially closed, the roller 118 may be disposed in the bracket 190 . When the door 10 is closed, the spring 142 may be compressed to a first length. When the door 10 is closed, the rod 152 may be compressed to a first length.

When the door 10 is opened by a user's external force, the roller 118 may slide along the inner surface of the bracket 190 and the inner surface of the door 10 as shown in FIGS. 4 to 9 . have.

At this time, the arm 110 may be rotated according to the sliding movement of the roller 118 accommodated in the bracket 190 . 4 to 9 , it is exemplified that the arm 110 is rotated counterclockwise when the door 10 is opened.

The second arm 114 is rotated according to the counterclockwise rotation of the arm 110 , and the link 130 and the pressing part 141 hinged to the second arm 114 may also be moved. . At this time, the spring 142 is compressed to have the shortest length when the pressing part 141 and the link 130 are in a straight line, and then, according to the continued rotation of the arm 110 , the pressing part When the linear state of 141 and the link 130 is released ( FIG. 7 ), an elastic force may be provided in a direction to push the pressing part 141 .

As a result, when the door 10 is opened, it is initially moved by a predetermined distance by the user's external force, and thereafter, it can be opened without the user's external force by the elastic force of the spring 142 .

Meanwhile, when the door 10 is opened, the third arm 116 also rotates, and the gear unit 154 gear-coupled to the third arm 116 may also be moved. In this case, the movement of the gear unit 154 may be in a direction in which the length of the rod 152 protruding from the cylinder increases. That is, when the door 10 is opened, the length of the rod 152 may be extended.

The arm 110 rotates until the end of the gear unit 154 comes into contact with the bottom surface of the escape groove 106 by the elastic force of the spring 142 .

In summary, when the door 10 is opened, the arm 110 is rotated at a predetermined angle by the user's external force, and then the arm 110 is rotated through the elastic force of the spring 142 to rotate the door ( 10) can be opened and closed automatically. When completely separated from the door 10 and the door damper device 100 , as shown in FIGS. 8 and 9 , the end of the gear unit 154 is at the bottom of the escape groove 106 . The contact may stop the rotation of the arm 110 .

Next, referring to FIGS. 10 to 13 , while the opened door 10 is closed, the roller 118 may initially contact the inner surface of the door 10 . Accordingly, the roller 118 may slide into the bracket 190 while the door 10 is closed.

The arm 110 may be rotated clockwise by the pressing force to close the door 10 . By the clockwise rotation of the arm 110 , the spring 142 may be compressed through the link 130 .

Specifically, as shown in FIG. 12 , when the pressing part 141 , the link 130 , and the rotation shaft 113 are substantially in a straight line, the spring 142 may be maximally compressed. Afterwards, when the pressing part 141, the link 130, and the rotating shaft 113 are out of a straight state due to an external force that continuously closes the door 10, the roller 118 is a bracket attached to the door 10 ( Through the elastic force of the spring 142 without the user's external force through the 190, the door 10 can be closed.

As the third arm 116 rotates clockwise, the gear unit 154 also moves in a direction opposite to the door opening direction, and the rod 152 protruding from the cylinder may be compressed. In this case, a damping force may be provided to compression of the rod 152 according to energy absorption of the damper 150 . Accordingly, the rotational force of the arm 110 may be attenuated. As a result, the closing force of the door 10 is attenuated, so that the door 10 can be closed at a speed lower than the initial closing speed.

The closing operation of the door 10 includes a first operation of closing the door 10 while the roller 118 is not in contact with the inner surface of the door 10 , and the roller 118 is installed on the inner surface of the door 10 . When divided into a second operation of closing in a contact state, since the damping force of the damper 150 is provided in the second operation, the door 10 can be closed at a relatively low speed. Accordingly, an accident such as a user's hand pinching can be prevented in advance.

14 is a plan view of a damper device for a door according to a second embodiment of the present invention, and FIG. 15 is a plan view showing the configuration of a damper device for a door according to a second embodiment of the present invention.

14 and 15 , the door damper device 200 according to the second embodiment of the present invention may be coupled to the frame 20 and the door 10 , respectively. The frame 20 is disposed outside the door 10 to form a space in which the door 10 is disposed. The frame 20 may be fixed to a wall, which is an installation area of the door 10 . For example, the frame 20 may have an upper end coupled to a ceiling surface and a lower end coupled to the floor surface.

The door 10 may be opened and closed in an opening/closing manner. The door 10 may be rotated about the hinge shaft 30 inside the frame 20 to open and close the inner space of the frame 20 .

The damper device 200 for the door absorbs the shock applied when the door 10 is closed and closes it smoothly, thereby preventing noise and shock. The door damper device 200 may include a case 201 , an arm 210 , a link 230 , an elastic member 240 , a damper 250 , a roller 218 , and a bracket 290 . .

The case 201 may be disposed on the inner surface of the frame 20 . For example, the case 201 may be disposed on the upper surface of the inner side of the frame 20 . The case 201 may be screwed to the inner surface of the frame 20 . The case 201 may be formed by combining the first case and the second case. Alternatively, the case 201 may be formed as a single unit body. A hole may be formed in a side surface of the case 201 so that at least a portion of the arm 210 passes therethrough.

A space for accommodating the arm 210 , the link 230 , the elastic member 240 , and the damper 250 may be formed inside the case 201 .

The inside of the case 201 may be partitioned into different spaces. For example, the case 201 includes a first space in which the elastic member 240 is disposed, a second space in which the damper 250 is disposed, and a third space in which the arm 210 is disposed. can do. Among them, the first space portion and the second space portion may be partitioned from other regions through a partition wall, respectively. For example, a first space portion disposed between a plurality of partition walls is disposed in a first area of the case 101 , and a second space portion disposed between a plurality of partition walls is disposed in a second area of the case 101 . can be

The first space portion may be disposed closer to the door 10 than the second space portion.

The arm 210 is configured to rotate according to the opening and closing of the door 10 , and a part is disposed in the case 201 , and the other part penetrates a hole formed in a side surface of the case 201 to the case 201 . It may be disposed outside of 201 .

The arm 210 may rotate about a rotation shaft 211 . One or both ends of the rotation shaft 211 may be coupled to the inner surface of the case 201 to form a rotation center of the arm 210 . A bearing (not shown) may be coupled to the rotation shaft 211 to support rotation of the arm 210 .

The arm 210 may include a first arm 212 , a second arm 214 , and a third arm 216 . The first arm 212 , the second arm 214 , and the third arm 216 may be formed as one body. The first arm 212 , the second arm 214 , and the third arm 216 may be radially disposed about the rotation shaft 211 . The second arm 214 may be disposed between the first arm 212 and the third arm 216 in a circumferential direction.

At least a portion of the first arm 212 may protrude to the outside of the case 201 through a hole formed in a side surface of the case 201 . A roller 218 rotating with respect to the first arm 212 may be disposed at an end of the first arm 212 protruding to the outside of the case 201 . According to the opening and closing of the door 10 , the roller 218 may slide on the inner surface of the door 10 to be accommodated in a bracket 290 to be described later or may be separated from the bracket 290 .

The second arm 214 may be disposed to be circumferentially spaced apart from the first arm 212 with respect to the rotation shaft 211 . An end of the second arm 214 may be hinged with one end of the link 230 . An angle formed by the second arm 214 and the link 230 may be changed according to the rotation of the arm 210 .

The third arm 216 may be formed to extend inwardly from the rotation shaft 211 . The third arm 216 may be formed in a shape in which the cross-sectional area increases toward the inside. The cross-sectional shape of the third arm 216 may be a fan shape. A first gear 217 may be formed at an end of the third arm 216 . An end of the third arm 216 may be connected to the damper 250 . The third arm 216 may be gear-coupled to the damper 250 .

The damper 250 may be disposed in the second space in the case 201 . The damper 250 may be disposed inside the arm 210 . The damper 250 may be disposed inside the elastic member 240 .

The damper 250 may be driven in various ways including a hydraulic method, a pneumatic method, and a spring method. The damper 250 is coupled to a cylinder, a rod 252 installed to be extensible with respect to the cylinder, and an end of the rod 252 to be movable in the case 201 together with the rod 252 . It may include a gear unit 254 is installed. The cylinder, the rod 252 and the gear unit 254 may be arranged side by side in the longitudinal direction.

A second gear 255 may be disposed on one side of the gear unit 254 . The second gear 255 may be disposed on an outer surface of the gear unit 254 facing the first gear 217 . The second gear 255 may mesh with the first gear 217 . Accordingly, when the arm 210 rotates according to the opening and closing of the door 10 , the rod 252 and the gear unit 254 may move together with the third arm 216 .

An escape groove (not shown) may be formed on the inner surface of the case 201 to be recessed than other regions, and contact the end of the gear unit 254 when the door 10 is opened.

A guide rail (not shown) for guiding the movement of the gear unit 254 may be formed on the inner surface of the case 201 . For example, the guide rail may be a protrusion protruding from the inner surface of the case 201 . In addition, a groove may be formed in a side surface of the gear unit 254 so that the protrusion slides. As another example, the guide rail may be a groove that is recessed compared to other regions of the inner surface of the case 201 . In addition, a protrusion may be formed on a side surface of the gear unit 254 to slide along the groove. According to the structure as described above, the gear unit 254 may slide the guide rail.

According to the opening and closing of the door 10 , the rod 252 may be expanded or compressed with respect to the cylinder. For example, when the door 10 is opened, the length of the rod 252 protruding from the cylinder may be shortened according to the counterclockwise rotation of the arm 210 . When the door 10 is closed, the length of the rod 252 protruding from the cylinder may be increased according to the clockwise rotation of the arm 210 .

In the case 201 , an arrangement space of the cylinder among the dampers 250 may be partitioned from other regions. The arrangement space of the cylinder may be partitioned through a partition. At this time, a buffer spring 251 may be disposed between the inner surface of the partition and the end of the cylinder. Accordingly, the vibration of the damper 250 generated according to the movement of the rod 252 may be elastically absorbed.

The damper 250 may be an extension damper that absorbs energy when the rod 252 is stretched. Accordingly, when the rod 252 is compressed according to the opening of the door 10 , the rod 252 may be freely compressed without attenuation. However, a damping force may be provided when the rod 252 is extended according to the closing of the door 10 .

The elastic member 240 may be disposed in the first space in the case 201 . The elastic member 240 may include a pressing part 241 and a spring 242 . The pressing part 241 may be hinged to the other end of the link 230 . One end of the spring 242 may be coupled to the inner surface of the case 201 , and the other end may be coupled to the pressing part 241 . A coupling part may be provided on an inner surface of the case 201 and an end of the pressing part 241 to facilitate coupling of the spring 242 .

When the arm 210 is rotated according to the opening and closing of the door 10 , the pressing part 241 moves in the direction of compressing the spring 242 or by the elastic force of the spring 242 being extended. It can move to press the link 230 .

Specifically, when the door 10 is opened, the pressing part 241 presses the link 230 through the elastic force of the spring 242 to rotate the arm 210 . When the door 10 is closed, by rotation of the arm 210 , the pressing unit 241 may press the spring 242 in a direction in which the spring 242 is compressed.

When the pressing part 241 moves according to the elastic force of the spring 242 , the elastic member 240 rotates the arm 210 so that the door 10 can be opened without a user's external force.

The bracket 290 may be disposed on the inner surface of the door 10 . The bracket 290 may accommodate the roller 218 or separate the accommodated roller 218 according to the opening and closing of the door 10 . To this end, an opening through which the roller 218 is drawn in or drawn out according to the opening and closing of the door 10 may be formed on a side surface of the bracket 290 . The bracket 290 may be disposed on the inner surface of the door 10 to form the same height as the case 201 .

One end of the link 230 may be hingedly coupled to the pressing part 241 , and the other end may be hingedly coupled to the second arm 214 . According to the rotation of the arm 210 , the angle formed by the link 230 and the second arm 214 and the angle formed by the link 230 and the pressing part 241 may vary. .

Hereinafter, an operation of the door damper device 100 according to the present embodiment will be described.

15 to 22 are views for explaining the operation of the damper device for a door according to the second embodiment of the present invention.

15 to 18 are views illustrating a state in which the door is opened, and FIGS. 19 to 22 are views illustrating a state in which the door is closed.

When the door 10 is initially closed, as shown in FIG. 15 , the roller 218 may be disposed in the bracket 290 . When the door 10 is closed, the spring 242 may be compressed to a first length. When the door 10 is closed, the rod 252 may be extended to a first length.

When the door 10 is opened by a user's external force, the roller 218 may slide along the inner surface of the bracket 290 and the inner surface of the door 10 .

At this time, the arm 210 may be rotated according to the sliding movement of the roller 218 accommodated in the bracket 290 . For example, when the door 10 is opened, the arm 210 may be rotated counterclockwise.

The second arm 214 is rotated according to the counterclockwise rotation of the arm 210 , and the link 230 hinged with the second arm 214 and the pressing part 241 may also be moved. . At this time, the spring 242 is compressed to have the shortest length when the pressing part 241 and the link 230 are in a straight line, and then, as the arm 210 continues to rotate, the pressing part When the linear state of 241 and the link 230 is released ( FIG. 17 ), an elastic force may be provided in a direction in which the pressing part 241 is pushed.

As a result, when the door 10 is opened, it is initially moved by a predetermined distance by the user's external force, and then can be opened without the user's external force by the elastic force of the spring 242 .

Meanwhile, when the door 10 is opened, the third arm 216 also rotates, and the gear unit 254 geared to the third arm 216 may also be moved. In this case, the movement of the gear unit 254 may be in a direction in which the length of the rod 252 protruding from the cylinder is shortened. That is, when the door 10 is opened, the length of the rod 252 may be compressed.

The arm 210 may be rotated until the rod 252 is compressed to its shortest length. The rotation of the arm 210, as shown in FIGS. 15 to 18, can be made until the right-P end of the gear part 254 comes into contact with the partition wall between the gear part 254 and the cylinder, In this case, the length of the rod 252 may have the shortest length.

In summary, when the door 10 is opened, the arm 210 is initially rotated by a predetermined angle by the user's external force, and then the arm 210 is rotated through the elastic force of the spring 242 to rotate the door ( 10) can be opened and closed automatically. When the door 10 and the door damper device 200 are completely separated from each other, the length of the rod 252 may be compressed to the shortest length as shown in FIG. 18 .

Next, referring to FIGS. 19 to 22 , while the opened door 10 is closed, the roller 218 may initially contact the inner surface of the door 10 . Accordingly, the roller 218 may slide into the bracket 290 while the door 10 is closed.

The arm 210 may be rotated clockwise by the pressing force to close the door 10 . By the clockwise rotation of the arm 210 , the spring 242 may be compressed through the link 230 .

Specifically, as shown in FIG. 20 , when the pressing part 241 , the link 230 , and the second arm 214 are substantially straight, the spring 242 can be maximally compressed. Afterwards, when the pressing part 241, the link 230, and the second arm 214 are out of a straight line by an external force that continuously closes the door 10, the roller 218 is attached to the door 10. The door 10 can be closed by the elastic force of the spring 242 without the user's external force through the bracket 290 .

As the third arm 216 rotates clockwise, the gear unit 254 also moves in a direction opposite to the door opening direction, and the compressed rod 252 may be extended. In this case, a damping force may be provided to the extension of the rod 252 according to energy absorption of the damper 250 . Accordingly, the rotational force of the arm 210 may be attenuated. As a result, the closing force of the door 10 is attenuated, so that the door 10 can be closed at a speed lower than the initial closing speed.

The closing operation of the door 10 includes a first operation of closing the door 10 in a state where the roller 218 is not in contact with the inner surface of the door 10 , and the roller 218 is installed on the inner surface of the door 10 . When divided into a second operation of closing in a contact state, since the damping force of the damper 250 is provided in the second operation, the door 10 can be closed at a relatively low speed. Accordingly, an accident such as a user's hand pinching can be prevented in advance.

In the above, even though it has been described that all the components constituting the embodiment of the present invention operate by being combined or combined into one, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more. In addition, terms such as 'include', 'comprise', or 'have' described above mean that the component may be inherent unless otherwise stated, so other components are excluded. Rather, it should be construed as being able to further include other components. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (10)

In the door damper device for absorbing the impact of the door opened and closed by the opening method in the frame,
a case disposed on the inner surface of the frame and having a hole formed on the side thereof;
an arm disposed in the case, rotating about a rotation axis according to opening and closing of the door, and including a first arm, a second arm, and a third arm;
a roller disposed at an end of the first arm to slide and move an inner surface of the door according to opening and closing of the door;
an elastic member connected to the end of the second arm and selectively providing elastic force according to the opening and closing of the door; and
A door damper device comprising a damper comprising a gear coupled to the third arm and a gear unit, and a rod compressed and extended with respect to a cylinder according to movement of the gear unit.
The method of claim 1,
When the door is opened, the elastic member provides an elastic force to rotate the arm in the first direction,
When the door is closed, the elastic member provides an elastic force to rotate the arm in a second direction opposite to the first direction.
3. The method of claim 2,
When the arm rotates in the first direction, the rod is extended,
When the arm rotates in the second direction, the rod is compressed for a door damper device.
4. The method of claim 3,
The damper is a door damper that absorbs energy when the rod is compressed.
3. The method of claim 2,
When the arm rotates in the first direction, the rod is compressed,
When the arm rotates in the second direction, the rod is extended.
6. The method of claim 5,
The damper is a door damper that absorbs energy when the rod is stretched.
The method of claim 1,
A bracket through which the roller enters and exits according to the opening of the door is disposed on the inner surface of the door,
A door damper device having an opening formed on a side surface of the bracket.
The method of claim 1,
and a link having one end connected to the elastic member and the other end connected to the second arm.
4. The method of claim 3,
A damper device for a door in which a buffer is disposed between the inner surface of the housing and the cylinder.
The method of claim 1,
A door damper device in which an escape groove contacting the gear part is formed on an inner surface of the housing according to the movement of the rod.

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