KR20170055258A - Shock absorbing device for door - Google Patents

Abstract

The door shock absorber includes a rotary unit rotated by opening and closing a door, and a rotary body rotated together with the rotary piece; A linear reciprocating unit linearly reciprocating by the rotation of the rotary body and having a rack gear portion; An elastic force applying unit for elastically supporting the linear reciprocating unit; A gear unit including a pinion gear rotatably engaged with the rack gear portion and a spur gear engaged with the pinion gear; A damper unit that is rotated by the gear unit and adjusts a rotating speed of the rotating body using a magnetic field; And a case housing the rotating unit, the linear reciprocating unit, the gear unit, and the damper unit.

Description

[0001] SHOCK ABSORBING DEVICE FOR DOOR [0002]

The present invention relates to a door shock absorber.

Generally, in the case of a door of a home, an office space, or a heavy steel fire door, when the door is opened, the door is opened quickly with a small force, and when the door is closed, the door is closed at a slow speed, A door closer is installed to prevent this.

Korean Patent Laid-Open Publication No. 10-2014-0106075, a door shock absorber, disclosed on September 3, 2014, includes a magnetic force generating portion formed on one side of a door and generating a magnetic force, and a door frame formed at a position corresponding to the magnetic force generating portion And a full-flow generating unit that generates an eddy current in accordance with the approach of the magnetic force generating unit.

In the prior art shown in Fig. 2 of the above-described door shock absorber, a cylinder having a hydraulic piston incorporated therein is provided in the body, a compression spring is installed at one side of the cylinder, and a rack is installed at one side of the piston The rack is provided with a door closure which is engaged with a pinion provided at one end of the input rotary shaft and a link is connected to the other rotary shaft of the input rotary shaft.

However, in the prior art system shown in FIG. 2 of the above-mentioned door shock absorber, the piston and the cylinder are used to perform the buffering action of the door. However, when the piston and the cylinder are used, wear of the piston or the cylinder is easily occurred, May be reduced and serious noise may be generated when the person is injured or the door is closed.

The door shock absorber includes a vortex generating unit formed in a door frame and a magnetic force generating unit disposed in the door to generate a magnetic force. The door shock absorber has a structure in which the vortex generating unit and the magnetic force generating unit are separated from each other, Buffering effect is generated only when it is close to the door. In a door with a heavy weight such as a steel door, the buffering effect may be reduced or the buffering effect may not be generated, so that a serious noise may be generated when the door is closed or the body is damaged.

Korean Patent Laid-Open Publication No. 10-2014-0106075, a door shock absorber (September 3, 2014)

The present invention provides a door shock absorber which is gently closed when an open door is closed to prevent body damage and noise.

The present invention provides a door shock absorber having a compact size and a damper having a large buffering force to reduce the size and improve the appearance.

The present invention provides a door shock absorber which can be mounted regardless of the opening direction of the door.

In one embodiment, the door shock absorber includes a turning unit including a turning piece rotated by opening and closing a door, and a turning body rotated together with the turning piece; A linear reciprocating unit linearly reciprocating by the rotation of the rotary body and having a rack gear portion; An elastic force applying unit for elastically supporting the linear reciprocating unit; A gear unit including a pinion gear rotatably engaged with the rack gear portion and a spur gear engaged with the pinion gear; A damper unit that is rotated by the gear unit and adjusts a rotating speed of the rotating body using a magnetic field; And a case housing the rotating unit, the linear reciprocating unit, the gear unit, and the damper unit.

The pivoting body of the door shock absorber is formed in a block shape having a side surface and a top surface connected to the side surface and the pivoting piece is coupled to any one of the upper surface and the lower surface of the pivoting body, And a slanting jaw formed in the groove of the rotating body.

The elastic force applying unit of the door shock absorber includes a movable block coupled to the linear reciprocating unit, a link unit linked to the movable block and the rotary body, and a coil spring elastically supported by the movable block.

The gear unit of the door shock absorber includes a first spur gear coaxial with the pinion gear, a second spur gear engaged with the first spur gear, and a third spur gear engaged with the second spur gear and rotating the damper unit. Gear.

A ratchet gear portion formed in the pinion gear of the door shock absorber and a ratchet coupled to the first spur gear and selectively coupled to the ratchet gear portion by advancing and retracting the linear reciprocating unit.

The damper portion of the door shock absorber includes a speed increasing gear meshed with the gear unit, a magnet plate rotated by the speed increasing gear and including a permanent magnet, and a metal plate arranged to face the magnet plate and fixed to the case.

The magnet plate of the door shock absorber includes a first magnet plate and a second magnet plate facing each other, and the metal plate is fixed between the first and second magnet plates.

In the case of the door shock absorber, an escape portion is formed so that the pivoting piece and the case do not interfere with each other when the pivoting piece is pivoted.

The door shock absorber further includes a body mounted on a door frame of the door, an elevating rod ascending and descending within the body, and a resilient member including an elastic member for providing an elastic force to the elevating rod.

The door damper according to the present invention can be gently closed when the door in the opened state is closed to prevent damage to the body and noise and to reduce the size and improve the appearance by using a damper having a compact size and a large buffering force So that it can be mounted regardless of the opening direction of the door.

1 is an external perspective view of a door shock absorber according to an embodiment of the present invention. Fig. 2 is a perspective view of the door shock absorber with the case of Fig. 1 removed. Fig.
FIG. 3 is a perspective view showing the rotating unit of FIG. 2 as an excerpt. FIG. Fig. 4 is a perspective view of the pivoting piece shown in Fig. 1; Fig.
5 is a perspective view showing a gear unit and a damper unit according to an embodiment of the present invention.
6 is a perspective view showing a pivotal motion operation unit according to an embodiment of the present invention.
7 and 8 are perspective views illustrating the operation of the door shock absorber according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The invention, which is set forth below, may be embodied with various changes and may have various embodiments, and specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Also, the terms first, second, etc. may be used to distinguish between various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

1 is an external perspective view of a door shock absorber according to an embodiment of the present invention. Fig. 2 is a perspective view of the door shock absorber with the case of Fig. 1 removed. Fig.

1 and 2, the door shock absorber 800 includes a rotary unit 100, a linear reciprocating unit 200, an elastic force applying unit 300, a gear unit 400, a damper unit 500 And a case 600.

FIG. 3 is a perspective view showing the rotating unit of FIG. 2 as an excerpt. FIG. Fig. 4 is a perspective view of the pivoting piece shown in Fig. 1; Fig.

Referring to FIG. 2, when the door pivoted or closed in the first direction is engaged with the pivotal motion operation unit mounted on the door frame of the door when the door is closed, And is pivoted by the operating unit in a second direction opposite to the first direction.

3 and 4, the rotating unit 100 includes a rotating piece 110 and a rotating body 150. As shown in FIG.

The rotating piece 110 includes a rotating body 112 and a catching jaw 116.

The rotating body 112 is formed, for example, in the shape of a rectangular plate, and the rotating body 112 is formed with a recess 113 formed concave from the upper surface of the rotating body 112.

The shaft 112 is formed with a shaft hole 115 eccentric to one side from the center of the rotary body 112 and a shaft is inserted into the shaft hole 115. The shaft hole 115 and the rotary shaft 150, And the pivoting body 112 and the pivoting body 150 are rotated in the same direction.

The engaging jaw 116 is formed inside the groove 113 of the rotating body 112 and the engaging jaw 116 is formed with an inclined surface 117 whose height increases continuously from the front end to the rear end. The stopping jaw 116 is formed, for example, in an equilateral triangle when viewed in cross section.

A concave space is formed between the rear surface 116a of the stopping jaw 116 and the side wall 112a of the rotating body 112 facing the rear surface 116a, 900 are engaged with each other.

Specifically, the elevating rod 920 of the pivotal motion unit 900 fixed to the door frame is moved along the inclined surface 117 of the latching jaw 116, and then the rear surface 116a of the latching jaw 116 and the rotating body 112, and the pivoting piece 110 is pivoted.

The angle? Formed by the rear surface 116a of the engaging jaw 116 and the side surface 116b of the engaging jaw 116 which meets the rear surface 116a is formed at an obtuse angle, for example. Alternatively, the angle [theta] formed by the side surface 116b of the stopping jaw 116 which meets the rear surface 116a and the rear surface 116a of the stopping jaw 116 may be formed at an acute angle, for example .

The pivoting member 150 is coupled to the pivoting member 110 so that the pivoting member 150 is rotated together with the pivoting member 110.

The pivoting member 150 is formed in a block shape having a side surface, a top surface connected to the side surface, and a bottom surface connected to the side surface, and the pivoting member 110 is coupled to either the top surface or the bottom surface of the pivot member 150.

In one embodiment of the present invention, when the rotating piece 110 has a structure that can be coupled to either the upper surface or the lower surface of the rotary body 150, the door shock absorber 800 may include a door opened from left to right, All doors can be mounted on the door opening to the left.

That is, in one embodiment of the present invention, the pivoting piece 110 is installed on either the upper surface or the lower surface of the rotary body 150 in accordance with the opening and closing direction of the door.

Grooves formed in a direction parallel to the rotating piece 110 are formed on the side surface of the rotating body 150. Grooves formed on the side surface of the rotating body 150 are formed on the side surface of the rotating body 150, . An axis is disposed in the groove formed in the side surface of the rotary body (150).

2, the linear reciprocating unit 200 advances or retreats along the X-axis direction shown in Fig. 2 by the pivotal direction of the pivoting piece 110. As shown in Fig.

In one embodiment of the present invention, the linear reciprocating unit 200 advances along the X-axis direction when the door is closed, and retreats along the X-axis direction when the door is opened.

The linear reciprocating unit 200 is formed in a bar shape formed in the X axis direction, and a rack gear portion 205 is formed on a lower surface of the linear reciprocating unit 200. In one embodiment of the present invention, the linear reciprocating unit 200 serves as a rack gear.

A pushing roller 210 for preventing the linear reciprocating unit 200 from moving in the Z-axis direction shown in FIG. 2 is disposed on the upper surface of the linear reciprocating unit 200, which is opposite to the lower surface of the rack gear portion 205 do. The pressing roller 210 is fixed to a case 600 to be described later.

2, the elastic force applying unit 300 elastically supports the linear reciprocating unit 200, and the elastic force applying unit 300 presses the linear reciprocating unit 200 in the X axis direction.

The elastic force applying unit 300 includes a movable block 310, a link unit 320, and a coil spring 330.

The movable block 310 is disposed to face the pivotal member 150 of the pivoting unit 100. The movable block 310 is formed with a storage space therein. The movable block 310 is, for example, .

The linear reciprocating unit 200 is mechanically fixed to the movable block 310.

The link unit 320 is formed in a flat plate shape and one end of the link unit 320 is hinged to the shaft disposed in the groove formed in the side surface of the pivot member 150, And the other end opposite to the one end is hinged to the end of the movable block 310 disposed to face the pivotal member 150.

The link unit 320 is rotated along the XY plane shown in FIG. 2 in accordance with the rotation of the rotary body 150 of the rotary unit 100. When the link unit 320 rotates, Direction.

The linear reciprocating unit 200 fixed to the movable block 310 is linearly reciprocated in the X axis direction as the movable block 310 is linearly reciprocated along the X axis direction by the rotation of the link unit 320. [

One end of the coil spring 330 is supported by a case 600 to be described later and the other end opposite to the one end of the coil spring 330 is inserted into the movable block 310, .

That is, the coil spring 330 provides an elastic force to press the movable block 310 in the direction toward the rotating body 150 of the rotating unit 100.

Specifically, when the rotary body 150 of the rotary unit 100 is rotated, the link unit 320 is rotated, thereby causing the movable block 310 to be displaced in the X-axis direction by the elastic force of the coil spring 330 do.

5 is a perspective view showing a gear unit and a damper unit according to an embodiment of the present invention.

Referring again to FIGS. 2 and 5, the gear unit 400 generates rotational motion in accordance with the displacement of the linear reciprocating unit 200 in the linear reciprocating motion in the X-axis direction.

When the door is closed, the gear unit 400 converts the linear reciprocating motion of the linear reciprocating unit 200 into rotational force and transmits the rotational force to the damper unit 500.

Conversely, when the door is opened, the gear unit 400 converts the linear reciprocating motion of the linear reciprocating unit 200 into rotational force, but does not transmit the rotational force to the damper unit 500.

When the door is closed by the gear unit 400, it is closed slowly, and when the door is opened, it can be opened quickly with a small force.

The gear unit 400 includes a pinion gear 410 to be engaged with a rack gear portion 205 disposed on a lower surface of the linear reciprocating unit 200, a first spur gear 420 A second spur gear (not shown) to be engaged with the first spur gear 420; a third spur gear 440 disposed coaxially with the second spur gear and rotated at the same rotational speed as the second spur gear; .

The pinion gear 410 of the gear unit 400 may be integrally formed with the ratchet gear 415 and the first spur gear 420 may be integrally formed with the ratchet gear 415 along the rotational direction of the pinion gear 410. [ And a ratchet 425 coupled to or separated from the ratchet 425.

When the door is closed, the linear reciprocating unit 200 goes straight along the X-axis direction, whereby the rack gear portion 205 of the linear reciprocating unit 200 rotates the pinion gear 410 in the clockwise direction.

The ratchet gear 415 coupled to the pinion gear 410 is engaged with the ratchet 425 when the pinion gear 410 is rotated clockwise with the door closed.

When the ratchet 425 coupled to the first spur gear 420 is engaged with the clockwise ratchet gear 415, the pinion gear 410 and the first spur gear 420 rotate in the same direction do.

By the rotation of the first spur gear 420, the second spur gear and the third spur gear 440 are also rotated.

When the closed door is opened, the linear reciprocating unit 200 retracts along the X-axis direction, whereby the rack gear portion 205 of the linear reciprocating unit 200 rotates the pinion gear 410 counterclockwise .

When the pinion gear 410 is rotated counterclockwise, the ratchet gear 415 coupled to the pinion gear 410 is also rotated counterclockwise.

The ratchet 425 coupled to the first spur gear 420 is not engaged with the ratchet gear 415 rotated counterclockwise so that the pinion gear 410 rotates but the first spur gear 420 rotates .

The second spur gear and the third spur gear 440 do not rotate as the first spur gear 420 does not rotate.

Referring to FIG. 2 again, the damper unit 500 is rotated by the rotational force transmitted from the gear unit 400, and the damper unit 500 uses the attraction force or the repulsive force acting between the permanent magnets or the permanent magnet and the metal plate. Thereby adjusting the rotating speed of the rotating piece 150 of the rotating unit 100.

Referring again to FIG. 5, the damper unit 500 includes a speed increasing gear 510, a magnet plate 520, and a metal plate 530.

The speed increasing gear 510 is engaged with the third spur gear 440 of the gear unit 400 and the speed increasing gear 510 is formed with a diameter smaller than the diameter of the third spur gear 440, Is rotated at a higher speed than the third spur gear 440.

The magnet plate 520 is coaxial with the speed increasing gear 510, and the magnet plate 520 is formed into a disk shape including a permanent magnet.

In an embodiment of the present invention, the pair of magnet plates 520 coaxial with the speed increasing gear 510 may be arranged to face each other. Alternatively, the magnet plate 520 coaxial with the speed increasing gear 510 may be formed as one unit.

The metal plate 530 is arranged to face the magnet plate 520. When the magnet plates 520 are formed as a pair, the metal plate 530 is disposed between the magnet plates 520. In an embodiment of the present invention, 530 are fixed to the inside of the case 600.

Although it is shown and described that the metal plate 530 is fixed to the inside of the case 600 and the magnet plate 520 is rotated in the embodiment of the present invention, the metal plate 530 is coupled to the speed increasing gear 510, And the magnet plate 520 may be fixed to the inside of the case 600.

Referring again to FIG. 1, the case 600 is made of a metal material, a synthetic resin material, or the like, and a storage space is formed inside the case 600.

An escape groove 610 is formed in the case 600 to prevent interference with the pivoting piece 110 when the pivoting piece 110 of the pivoting unit 100 is mounted on the upper surface and the lower surface of the case 600, respectively .

In an embodiment of the present invention, the door dampers 800 may be mounted on doors opened from left to right or doors opened from right to left by forming escape grooves 610 on upper and lower surfaces of the case 600, respectively .

The rotary unit 100, the linear reciprocating unit 200, the elastic force applying unit 300, the gear unit 400 and the damper unit 500 described above are mounted in the storage space arranged inside the case 600 .

6 is a perspective view showing a pivotal motion operation unit according to an embodiment of the present invention.

Referring to Fig. 6, the pivotal operation unit 900 is mounted on the door frame.

The rotary unit operation unit 900 is disposed at a position corresponding to the rotary piece 110 of the door damping device 800 in the door frame and the rotary unit operation unit 900 rotates the rotary piece 110 to thereby open the door damping device 800) can perform the door buffering operation.

The turning unit operation unit 900 includes a body 910, an ascending / descending rod 920, and an elastic member 930.

The body 910 is a member fixed to the door frame, and the body 910 is formed with a through-hole 915 for fastening the door frame with a fastening screw.

The through hole 915 formed in the body 910 is formed to have a larger size than the diameter of the fastening screw so as to precisely adjust the position with the pivoting piece 110 of the door shock absorber 910. [ Alternatively, the through hole 915 formed in the body 910 may be formed in a cross shape when viewed in plan so that the position of the through hole 915 can be precisely adjusted with the pivoting piece 110.

A part of the lifting rod 920 is disposed inside the body 910 and a part of the lifting rod 920 is fixed to the body 910. The lifting rod 920 is formed in a cylindrical rod shape, As shown in Fig.

The ascending / descending rod 920 is lifted while being in contact with the pivoting piece 110, and is coupled to the pivoting piece 110.

The elastic member 930 is mounted inside the body 910 and the elastic member 930 is formed in the form of a compression coil spring and the lifting rod 920 is inserted into the elastic member 930. One end of the elastic member 930 is fixed to the body 910 and the other end opposite to the one end of the elastic member 930 is fixed to the lifting rod 920.

The elastic member 930 generates an elastic force as the lifting and lowering rod 920 is lifted and lowered and the elastic member 930 is lifted and lowered after the lifting and lowering rod 920 is coupled to the rotating piece 110 of the rotating unit 100 The descending rod 920 is lowered to prevent the ascending / descending rod 920 from being detached from the rotating piece 110.

7 and 8 are perspective views illustrating the operation of the door shock absorber according to an embodiment of the present invention.

Fig. 7 shows the state of the door shock absorber 800 when the door is opened, and Fig. 8 shows the state of the door shock absorber 800 when the door is closed.

Referring to FIG. 7, when the door is closed in the open state, the door shock absorber 800 mounted on the door is fixed to the door frame and approaches the turnover operation unit 900 shown in FIG. 6, The lifting rod 920 of the unit 900 is caught by the pivoting piece 110 of the pivoting unit 100.

The ascending / descending rod 920 is caught by the rotating piece 110 and then rotated together with the rotating piece 110 and the rotating body 150. In this process, the linear reciprocating unit 200 is advanced in the direction of the arrow in FIG.

The gear unit 400 is rotated by the advancement of the linear reciprocating unit 200 so that the rotational force of the gear unit 400 is transmitted to the damper unit 500 and the magnetic plate 520 of the damper unit 500 is rotated between the metal plates 530 The rotational force is decelerated and the decelerated rotational force is transmitted to the rotating unit 100 through the linear reciprocating unit 200 to decelerate the rotating speed of the rotating piece 110 to smoothly close the door when the door is closed, Can be prevented.

8, after the rotary piece 110 of the rotary unit 100 is completely rotated, the linear reciprocating unit 200 is stopped and the door is fixed to the door frame.

As described above in detail, when the door in an open state is closed, it is smoothly closed to prevent damage to the body and noise, and a damper having a compact size and a large buffering force can be used to reduce the size and improve the appearance So that it can be mounted regardless of the opening direction of the door.

It should be noted that the embodiments disclosed in the drawings are merely examples of specific examples for the purpose of understanding, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

100 ... rotation unit 200 ... linear reciprocating unit
300 ... elastic force application unit 400 ... gear unit
500 ... damper unit 600 ... case

Claims (9)

A turning unit including a turning piece rotated by opening and closing of the door and a turning body rotated together with the turning piece;
A linear reciprocating unit linearly reciprocating by the rotation of the rotary body and having a rack gear portion;
An elastic force applying unit for elastically supporting the linear reciprocating unit;
A gear unit including a pinion gear rotatably engaged with the rack gear portion and a spur gear engaged with the pinion gear;
A damper unit that is rotated by the gear unit and adjusts a rotating speed of the rotating body using a magnetic field; And
And a case accommodating the rotating unit, the linear reciprocating unit, the gear unit, and the damper unit. The method according to claim 1,
Wherein the pivoting body is formed in a block shape having a side surface and a top surface and a bottom surface connected to the side surface, the pivoting piece is coupled to any one of an upper surface and a lower surface of the pivoting body,
Wherein the pivoting piece includes a pivoting body having a concave groove formed therein, and a tilting latching jaw formed in the groove of the pivoting body. The method according to claim 1,
Wherein the elastic force applying unit includes a movable block coupled to the linear reciprocating unit, a link unit linked to the movable block and the rotary body, and a coil spring elastically supported by the movable block. The method according to claim 1,
The gear unit includes a first spur gear coaxial with the pinion gear, a second spur gear engaged with the first spur gear, and a third spur gear engaged with the second spur gear and rotating the damper unit Door shock absorber. 5. The method of claim 4,
A ratchet gear portion formed on the pinion gear and a ratchet coupled to the first spur gear and selectively coupled to the ratchet gear portion by advancing and retracting the linear reciprocating unit. The method according to claim 1,
Wherein the damper portion includes a speed increasing gear which is engaged with the gear unit, a magnet plate which is rotated by the speed increasing gear and includes a permanent magnet, and a metal plate which is arranged to face the magnet plate and is fixed to the case. The method according to claim 6,
Wherein the magnetic plate includes a first magnet plate and a second magnet plate arranged to face each other, and the metal plate is fixed between the first and second magnet plates. The method according to claim 1,
Wherein the case is provided with an escape portion such that the rotating piece and the case do not interfere with each other when the rotating piece is rotated. The method according to claim 1,
Further comprising a pivoting operation unit including a body mounted on the door frame of the door, an elevating rod ascending and descending within the body, and an elastic member providing an elastic force to the elevating rod.

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