WO2016064047A1

WO2016064047A1 - Door rotating apparatus

Info

Publication number: WO2016064047A1
Application number: PCT/KR2015/002637
Authority: WO
Inventors: 정길석; 전병기
Original assignee: 에버시스 주식회사
Priority date: 2014-10-21
Filing date: 2015-03-18
Publication date: 2016-04-28
Also published as: KR101643768B1; KR20160046692A

Abstract

The present invention relates to a door rotating apparatus which can maintain the open or closed state of a door, and vary the rotation speed of the door differently so that a user can enjoy a high quality feeling in use. A door rotating apparatus according to an embodiment of the present invention comprises: a housing part; a first shaft part; a second shaft part; and a gear part. Here, the housing part has a first space part and a second space part, which is separated from the first space part and contains a viscous fluid thereinside. The first shaft part is arranged in the first space part, forms the rotation center of the housing part, and rotates independently of the housing part. The second shaft part is arranged in the second space part, rotates independently of the housing part, and is provided with damping force by the viscous fluid. In addition, the gear part has a first gear coupled to the first shaft part, and a second gear, coupled to the second shaft part, in gear engagement with the first gear to deliver a rotation force to the second shaft part.

Description

Door rotator

The present invention relates to a door rotating device, and more particularly, to a door rotating device that can maintain the open and closed state of the door, and improve the feeling of use by varying the rotational speed of the door.

In general, in order to control the rotational force in the process of opening and closing the door, the cover, the lid and the like to use a door closer (Door Closer) so as not to close the door or cover suddenly.

The door closer includes a function for providing a rotational force to rotate the door or the cover and a damper for providing a damping force to prevent sudden rotation of the door or the cover. .

The damper can be largely classified into an elastic member method using an elastic member such as a spring, and a viscous fluid method using a viscous fluid to impart a damping force.

The damper to which the elastic member method is applied is installed between the casing, the shaft rotatably inserted into the casing, and the one end protrudes, and the damping force is provided between the casing and the shaft, as in Korean Patent Application Publication No. 1988-0014408. It is composed of an elastic member.

The damper of such an elastic member type cannot be employed when damping force is required only in one direction because the damping force is generated in both directions (clockwise and counterclockwise). In addition, there is a problem in that the damping force cannot be kept constant because the number of times of use brings about a change in the elastic force of the elastic member.

On the other hand, as a damper using a viscous fluid method, Korean Patent Publication No. 0414520 is disclosed. However, the damper using the conventional viscous fluid method has the following problems.

First, the oil damper using the conventional viscous fluid method needs to adjust the damping force according to the rotational force for rotating the application object, but the conventional oil damper has a problem that such damping force cannot be controlled.

In addition, the oil damper using the conventional viscous fluid method has many components in the housing in order to obtain a damping force due to the sealing and rotation of the viscous fluid, so that the structure is complicated and the assembly process is complicated, resulting in low productivity. In addition, due to such a complicated structure, the manufacturing cost is expensive, and the overall size of the oil damper has been increased, there are many limitations in applying to various fields.

In order to solve the above problems, the technical problem to be achieved by the present invention is to provide a door rotating device that can maintain the opening and closing state of the door, and improve the feeling of use by varying the rotational speed of the door.

In order to achieve the above technical problem, an embodiment of the present invention includes a housing portion having a first space portion, and a second space portion formed separately from the first space portion and the viscous fluid is received therein; A first shaft part provided in the first space part, forming a center of rotation of the housing part, and rotating independently of the housing part; A second shaft part provided in the second space part and rotating independently of the housing part and provided with a damping force by the viscous fluid; And a gear portion having a first gear coupled to the first shaft portion, and a second gear coupled to the second shaft portion and gear-coupled with the first gear to transmit rotational force to the second shaft portion. to provide.

In one embodiment of the present invention, one end portion of the first shaft portion is extended to the outside of the housing portion, the other end portion is located in the first space portion is formed with a first cam, so as to rotate independently of the housing portion A first cam coupled to the first cam and a first shaft coupled to the first cam and the other end coupled to the first gear; And a sliding cam sliding in the longitudinal direction of the first shaft, and having a second cam corresponding to the first cam formed at one end thereof facing the first cam, and surrounding the outer side of the first shaft. A part may have an elastic member that contacts the other end of the sliding cam and the other end contacts the engaging portion formed in the first space to support the sliding cam in the direction of the rotating cam.

In one embodiment of the present invention, the outer surface of the sliding cam is formed with a sliding projection in the longitudinal direction of the first axis at a predetermined interval along the circumferential direction, the sliding projection is coupled to the inner surface of the first space portion Guide grooves may be formed.

In one embodiment of the present invention, the first cam may have a plurality of first peaks and first valleys are formed alternately along the circumferential direction.

In one embodiment of the present invention, the second cam may have a second bone portion and a second acid portion that are simultaneously engaged with each of the first hill portion and the first valley portion.

In one embodiment of the present invention, the second shaft portion is provided in the longitudinal direction of the housing portion in the second space portion, one end is coupled to the coupling groove formed in the bottom portion of the second space portion, the other end is A second shaft coupled to the second gear and rotating independently of the housing portion, a damper portion coupled to the second shaft to rotate in association with the second shaft and pressurize the viscous fluid contained in the second space portion; It may have a stopper coupled to the other end of the second shaft to block the second space so that the viscous fluid does not leak.

In one embodiment of the present invention, the damper portion is coupled to the second shaft and rotates together with the second axis, and includes a part of the close contact groove and the close contact groove extending in the longitudinal direction of the second axis; A body having a flow path groove that is formed deeper than the contact groove to form a flow path for the viscous fluid to move, and is coupled to the contact groove and is pressed by the viscous fluid when the body is rotated to be in a rotational direction of the body. It may have a blade for selectively opening and closing the flow path groove while being tilted to hear the front end portion rearward.

In one embodiment of the present invention, the contact groove has a central groove formed in the longitudinal direction of the body, and the first contact surface and the second contact surface respectively formed on both sides of the central groove, the flow path groove is It may be formed to include a portion of the first contact surface and to be connected to the central groove.

In one embodiment of the present invention, the blade is a third contact surface in close contact with the first contact surface when the blade is tilted in one direction, and a fourth contact surface in close contact with the second contact surface when tilting in the other direction Can have

In one embodiment of the present invention, the second space portion may have a predetermined length along the circumferential direction of the second space portion, the outer surface may be formed to be in close contact with the body formed in contact with the body.

In one embodiment of the present invention, the inner peripheral surface of the second space portion may be formed to face the close contact with the speed adjusting groove having a predetermined length and width in the rotational direction of the second axis.

In one embodiment of the present invention, the housing portion may have a first housing having the first space portion and the second space portion, and a second housing coupled to the first housing so that the gear portion is provided inside. .

According to an embodiment of the present invention, the rotation speed of the door may be adjusted for each rotation section by using the damper unit.

In addition, according to an embodiment of the present invention, when the blade of the damper portion rotates in the direction in which the door is opened while tilting when the second shaft rotates, the damping force by the viscous fluid may be reduced, thereby improving user convenience. In addition, when the door rotates in the closing direction, the damping force by the viscous fluid is increased to prevent sudden rotation of the door, thereby improving safety.

The effects of the present invention are not limited to the above-described effects, but should be understood to include all the effects deduced from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a perspective view showing a door rotating apparatus according to an embodiment of the present invention.

Figure 2 is a block diagram showing the internal configuration of the door rotating apparatus according to an embodiment of the present invention.

Figure 3 is a cross-sectional view showing the internal configuration of the door rotating apparatus according to an embodiment of the present invention.

Figure 4 is an exploded perspective view showing a door rotating apparatus according to an embodiment of the present invention.

Figure 5 is a perspective view showing the inner configuration of the second space portion of the door rotating apparatus according to an embodiment of the present invention.

Figure 6 is an exploded perspective view showing a damper portion of the door rotating apparatus according to an embodiment of the present invention.

7 and 8 are planar views showing an example of the operation of the second shaft portion of the door rotating apparatus according to an embodiment of the present invention.

9 is a front view showing an example of the operation of the first shaft portion of the door rotating apparatus according to an embodiment of the present invention.

Figure 10 is an exploded perspective view showing a door rotation device and the bracket is coupled state according to an embodiment of the present invention.

11 is an exemplary view showing a state in which the door rotating apparatus according to an embodiment of the present invention is coupled to the refrigerator.

100: door rotation device 200: housing portion

210: first housing 211: first space part

212: second space part 219: speed control groove

300: first axis portion 310: rotary cam

320: first axis 330: sliding cam

340: elastic member 500: second shaft portion

510: second axis 520: damper portion

521: body 524: contact groove

525: Euro groove 526: Central groove

527: first contact surface 528: second contact surface

531: blade 532: third contact surface

533: fourth contact surface 540: stopper

546: oil filling hole 600: gear unit

610: first gear 620: second gear

800: bracket 900: refrigerator

910: main body 920: door

Hereinafter, with reference to the accompanying drawings will be described the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is "connected" to another part, it includes not only "directly connected" but also "indirectly connected" with another member in between. . In addition, when a part is said to "include" a certain component, this means that it may further include other components, without excluding the other components unless otherwise stated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a door rotating apparatus according to an embodiment of the present invention, Figure 2 is a block diagram showing the internal configuration of the door rotating apparatus according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention 4 is an exploded perspective view illustrating a door rotating apparatus according to an embodiment of the present invention, and FIG. 5 is a door rotating apparatus according to an embodiment of the present invention. Figure 6 is a perspective view showing the inner structure of the second space portion, Figure 6 is an exploded perspective view showing a damper portion of the door rotating apparatus according to an embodiment of the present invention.

1 to 6, the door rotating apparatus 100 according to an embodiment of the present invention is a housing portion 200, the first shaft portion 300, the second shaft portion 500 and the gear portion 600 It may include.

Here, the housing part 200 may have a second space part 212 formed separately from the first space part 211 and the first space part 211 and accommodating viscous fluid therein.

The first shaft part 300 may be provided in the first space part 211, may form a center of rotation of the housing part 200, and may rotate independently of the housing part 200.

In addition, the second shaft part 500 may be provided in the second space part 212, and may rotate independently of the housing part 200 and receive a damping force by viscous fluid.

In addition, the gear unit 600 is coupled to the first gear 610 and the second shaft portion 500, the gear portion 600 is coupled to the first gear 610 and the second shaft portion 500 It may have a second gear 620 for transmitting a rotational force to.

In detail, the housing part 200 may form a body of the door rotating apparatus 100.

The housing part 200 may have a first housing 210 and a second housing 250, wherein the first housing 210 is formed to be separated from each other and the first space portion 211 and the second space portion 212. )

The first space portion 211 may be formed to open to the outside through both ends of the first housing 210. That is, the first space 211 may be formed through the first housing 210 in the longitudinal direction.

The second space part 212 may be formed to open outwardly through one end of the first housing 210. That is, the second space 212 may be formed in the shape of the groove in the first housing 210. In addition, a viscous fluid may be accommodated in the second space 212. In this case, the viscous fluid may be oil. As the second space portion 212 is formed in the shape of a groove, leakage of the received viscous fluid through another portion except for one end of the second space portion 212 may be structurally prevented.

The second housing 250 may be coupled to one side of the first housing 210, and may have an open shape on one surface thereof. The second housing 250 may cover the gear unit 600 such that the gear unit 600, which will be described later, is provided on the inner side, and through this, the second housing 250 protects the gear unit 600, and foreign matter is Inflow can be prevented.

In addition, the first shaft part 300 may have a rotary cam 310, a first shaft 320, a sliding cam 330, and an elastic member 340.

First, the rotary cam 310 may have a rotary body 311 and the extension 312. The extension part 312 may form one end of the rotation cam 310 to protrude to the outside of the first space 211, and the rotation body 311 may form the other end of the rotation cam 310 to form a first end. It may be located in the space 211.

The outer surface of the rotating body 311 may be formed in a shape corresponding to the inner surface of the first space portion 211, for example, may have a cylindrical shape. The rotating body 311 may be coupled to rotate independently of the first housing 210.

The first cam 313 may be formed at one end of the rotating body 311. The first cam 313 may have a plurality of first peaks 314 and first valleys 315 which are alternately formed along the circumferential direction of the rotary body 311.

Here, each of the first mountain portion 314 and each of the first valley portion 315 may be formed in the same shape, and two first mountain portions 314 and the first valley portion 315 may be formed. . In addition, each of the first hill portion 314 and the first valley portion 315 may be formed to be symmetrical with each other, and the first hill portion 314 and the first valley portion 315 may be formed to be symmetric with respect to their respective centers. Can be. The highest portion of the first mountain portion 314 and the lowest portion of the neighboring first valley portion 315 may form an angular interval of 90 degrees with respect to the center of the rotation cam 310.

The extension 312 may be integrally formed with the rotation body 311. In addition, the extension part 312 may have a coupling surface 316 on an outer surface thereof. The coupling surface 316 may have a flat bottom surface and may be coupled to the first coupling hole 810 of the bracket 800. At this time, the washer 380 may be further coupled between the bracket 800 and the extension part 312.

In addition, a first through hole 317 may be formed in the center of the rotary cam 310 in the axial direction.

The first shaft 320 may be provided in the first space part 211 in the longitudinal direction of the first housing 210. One end of the first shaft 320 may be coupled to the first through hole 317 of the rotary cam 310. Through this, the first shaft 320 may be integrally rotated with the rotary cam 310.

In addition, a second through hole 331 may be formed in the center of the sliding cam 330 in the axial direction, and the first shaft 320 may be inserted into the second through hole 331. The inner diameter of the second through hole 331 may be larger than the outer diameter of the first shaft 320, through which the sliding cam 330 may slide in the longitudinal direction of the first shaft 320. . In addition, the first shaft 320 may rotate independently of the sliding cam 330.

The sliding protrusion 332 may be formed on the outer surface of the sliding cam 330 at a predetermined interval along the circumferential direction in the longitudinal direction of the first shaft 320. In addition, the guide groove 213 may be formed on the inner surface of the first space 211 to correspond to the sliding protrusion 332. The sliding protrusion 332 may be coupled to the guide groove 213, so that the sliding cam 330 may move in the longitudinal direction of the first shaft 320 without rotating in the first space 211. Will be. In addition, the sliding cam 330 can rotate in conjunction with the first housing 210.

The sliding cam 330 may be in close contact with the rotary cam 310, and the one end of the sliding cam 330 opposite to the first cam 313 of the rotary cam 310 may correspond to the first cam 313. The second cam 335 may be formed.

The second cam 335 may have a second valley portion 336 and a second hill portion 337 that may be simultaneously engaged with each of the first hill portion 314 and the first valley portion 315 of the first cam 313. have. To this end, the second cam 335 may be formed to correspond to the shape of the first cam 313.

The elastic member 340 may be provided to surround the outside of the first shaft 320. For example, the elastic member 340 may be a coil spring. One end of the elastic member 340 is provided to contact the other end of the sliding cam 330, the other end may be provided to contact the engaging portion 214 formed in the first space 211. Accordingly, the elastic member 340 may support the sliding cam 330 in the direction of the rotary cam 310.

And, the other end of the first shaft 320 may be provided to extend to the outside of the first space 211, the other end of the first shaft 320 through the third through-hole formed in the first gear 610 May be coupled to the ball 611. The other end of the first shaft 320 may be formed through the first pin hole 321, the first gear 610 may be formed through the second pin hole 612, the first pin hole 321 and As the first coupling pin 650 is coupled to the second pin hole 612, the first gear 610 may rotate integrally with the first shaft 320. That is, the rotary cam 310, the first shaft 320 and the first gear 610 may be integrally rotated.

When the first housing 210 is fixed and the rotary cam 310 is rotated, the first cam 313 of the rotary cam 310 is rotated to push the sliding cam 330, where the sliding cam 330 ) Is a sliding protrusion 332 is coupled to the guide groove 213, so that the rotation is impossible, it is moved in the longitudinal direction of the first shaft (320). Then, when the rotational force applied to the rotary cam 310 is removed, the sliding cam 330 is moved in the direction of the rotary cam 310 by the elastic force of the elastic member 340, accordingly, the rotary cam 310 It can be rotated in the opposite direction.

On the other hand, when the rotary cam 310 is fixed and the first housing 210 is rotated, the sliding cam 330 is rotated together with the first housing 210, since the rotary cam 310 is fixed, The sliding cam 330 moves in the longitudinal direction of the first shaft 320. Then, when the rotational force applied to the first housing 210 is removed, the sliding cam 330 is moved in the direction of the rotation cam 310 by the elastic force of the elastic member 340, accordingly, the first housing 210 ) Can rotate in the opposite direction.

The second shaft part 500 may have a second shaft 510, a damper part 520, and a stopper part 540.

The second shaft 510 may be provided in the second space part 212 in the longitudinal direction of the first housing 210. The second shaft 510 may be provided in parallel with the first shaft 320.

One end of the second shaft 510 may be coupled to the coupling groove 215 formed at the bottom of the second space 212. Here, the coupling groove 215 may be formed to have an inner diameter larger than the outer diameter of the second shaft 510, through which the second shaft 510 is rotated in a state coupled to the coupling groove 215 This may be possible.

In addition, the other end of the second shaft 510 may be coupled to the fourth through hole 621 formed in the second gear 620.

In addition, a third pin hole 511 may be formed through the other end of the second shaft 510, a fourth pin hole 622 may be formed through the second gear 620, and a third pin hole 511 may be formed therethrough. As the second coupling pin 651 is coupled to the fourth pin hole 622, the second gear 620 may rotate integrally with the second shaft 510. That is, the second shaft 510 can be rotated independently of the first housing 210.

In addition, the damper unit 520 may be coupled to the second shaft 510 to rotate together with the second shaft 510.

In detail, the damper portion 520 may have a body 521 and a blade 531.

The body 521 may have a fifth through hole 523 formed in the axial direction. The body 521 may be integrally rotated with the second shaft 510 by coupling the second shaft 510 to the fifth through hole 523.

Here, the body 521 may have a close groove 524 and a flow path groove 525.

The close contact groove 524 may extend in the longitudinal direction of the body 521. The close contact groove 524 has a central groove 526 formed in the longitudinal direction of the body 521 and a first contact surface 527 and a second contact surface 528 respectively formed at both sides of the central groove 526. Can have.

The flow path groove 525 may be formed to include a part of the contact groove 524, and specifically, may be formed to include a part of the first contact surface 527. In addition, the flow path groove 525 may be formed deeper than the close groove 524, it may be formed to be connected to the central groove 526. A plurality of flow path grooves 525 may be formed along the length direction of the body 521.

In addition, the blade 531 may be coupled to the contact groove 524 of the body 521.

The blade 531 has a third contact surface 532 formed to correspond to the first contact surface 527 of the contact groove 524 and a fourth contact surface 533 formed to correspond to the second contact surface 528. ) The third contact surface 532 and the fourth contact surface 533 may be formed in a convex shape as a whole. In addition, the blade 531 may have a length corresponding to the length of the body 521.

The blade 531 may be coupled to the tight groove 524 and positioned between the outer side of the body 521 and the inner circumferential surface of the second space part 212, and may be caught by the close groove 524 and rotate together with the body 521. can do. In this case, the blade 531 may have a clearance with the tight groove 524. Accordingly, the blade 531 may move in the circumferential direction from the inner side of the contact groove 524, or tilting may be inclined left and right about the longitudinal axis of the blade 531.

When the second shaft 510 is rotated, the blade 531 coupled to the contact groove 524 of the body 521 is also rotated together. In this case, the blade 531 is attached to the viscous fluid received in the front of the rotation direction. May be pressurized.

As described above, the blade 531 has a tolerance with the contact grooves 524, and the third contact surface 532 and the fourth contact surface 533 have convex shapes, so that the blade 531 is applied by the pressure of the viscous fluid. ) May be tilted such that the front end is lifted rearward in the direction of rotation. Here, the front end of the blade 531 means a front portion of the blade 531 based on the rotation direction of the blade 531.

This tilting direction of the blade 531 may be reversed depending on the rotation direction of the second axis 510. By tilting the blade 531, the third contact surface 532 and the fourth contact surface 533 of the blade 531 are respectively the first contact surface 527 and the second contact surface () of the contact groove 524. 528 may be in close contact with the flow of the viscous fluid, and through this, it may be provided with a damping force that prevents rotation of the second shaft 510.

When the blade 531 is tilted so that the fourth contact surface 533 is brought into close contact with the second contact surface 528 of the contact groove 524, the fourth contact surface 533 is continuous in the longitudinal direction of the body 521. Since it is formed as, the flow of the viscous fluid between the blade 531 and the body 521 can be blocked, through which a large damping force can occur.

On the other hand, when the blade 531 is tilted so that the third contact surface 532 is in close contact with the first contact surface 527 of the contact groove 524, the viscous fluid is formed in the central groove 526 and the flow path groove 525. In this case, a relatively low damping force can occur.

As a result, the blade 531 can selectively open and close the flow path groove 525 while tilting in a different direction according to the rotational direction, whereby a different damping force may occur.

The blade 531 may be tilted such that the third contact surface 532 comes into close contact with the first contact surface 527 when the blade 531 rotates in a direction in which the door 920 (see FIG. 11) to be described later opens. Fluid may be moved through the flow path groove 525. In addition, when the blade 531 rotates in the direction in which the door 920 is closed, the blade 531 may be tilted so that the fourth contact surface 533 is in close contact with the second contact surface 528 to block the flow of the viscous fluid.

The stopper 540 may be coupled to the other end of the second shaft 510. Specifically, the stopper 540 may be provided between the second gear 620 and the damper 520.

A sixth through hole 541 penetrating in the axial direction may be formed in the center of the stopper 540, and the second shaft 510 may be inserted into and coupled to the sixth through hole 541. The inner diameter of the sixth through hole 541 may be larger than the outer diameter of the second shaft 510, and thus, the second shaft in the state in which the plug portion 540 is coupled to the first housing 210. 510 may be rotatable.

In addition, the plug portion 540 may have a first screw thread 542 on the outer surface, the first screw thread 542 is screwed to the second screw thread 216 formed on the inner surface of the second space portion 212. Can be combined. The stopper 540 may be screwed to the second space 212 to seal the second space 212.

The plug portion 540 may have a first groove 543 in the circumferential direction, and the first sealing member 544 may be coupled to the first groove 543. The first sealing member 544 is in close contact with the inner surface of the second space portion 212 so that the viscous fluid contained in the second space portion 212 leaks between the plug portion 540 and the second space portion 212. Can be prevented. A plurality of first sealing members 544 and first grooves 543 may be provided.

In addition, a second groove 512 may be formed in a portion of the second shaft 510 to which the stopper 540 is coupled, and a second sealing member 513 may be coupled to the second groove 512. . The second sealing member 513 may be in close contact with the inner surface of the sixth through hole 541 of the stopper 540, thereby preventing the viscous fluid from leaking through the sixth through hole 541. Can be.

A first fastening groove 545 may be further formed on the top surface of the stopper 540 to which a rotating member (not shown) for rotating the stopper 540 may be coupled. A plurality of first fastening grooves 545 may be formed at predetermined intervals along the circumferential direction.

In addition, the plug portion 540 may be formed through the oil hole 546. The oil filling hole 546 may be formed to penetrate the upper and lower surfaces of the stopper 540. Accordingly, even after the plug portion 540 is coupled to the second space portion 212, the viscous fluid may be supplied to the second space portion 212 through the oil filling hole 546.

A stopper 547 may be coupled to the oil filling hole 546, and the stopper 547 seals the oil filling hole 546 so that the viscous fluid contained in the second space part 212 does not leak through the oil filling hole 546. You can do that. The stopper 547 and the oil filling hole 546 may be screwed, and a second fastening groove 548 may be coupled to the head of the stopper 547 to which a tool (not shown) for rotating the stopper 547 may be coupled. Can be formed. Here, the tool may be a wrench or the like.

Meanwhile, the close contact portion 217 may protrude from the second space portion 212. The close contact portion 217 may be formed to have a predetermined length along the circumferential direction of the second space portion 212. In addition, the outer surface 218 of the contact portion 217 may be formed to contact the body 521 of the damper portion 520. That is, the outer surface 218 of the contact portion 217 may be formed to have a curved surface corresponding to the outer peripheral surface of the body 521 of the damper portion 520. Accordingly, the movement of the viscous fluid through the contact portion 217 and the body 521 of the damper portion 520 may be limited.

As the second shaft 510 rotates, the blade 531 of the damper portion 520 may rotate in a space where the close contact portion 217 is not formed in the second space portion 212. The adhesion part 217 may reduce the volume of the viscous fluid accommodated in the second space part 212 by reducing the volume of the second space part 212, and may be applied to the viscous fluid pressurized by the rotating blade 531. Pressure may help to be delivered to the blade 531 more efficiently.

In addition, a speed control groove 219 may be formed on the inner circumferential surface of the second space part 212. The speed adjusting groove 219 may be formed to face the contact portion 217, and the speed adjusting groove 219 may be formed along the rotation direction of the second shaft 510. In addition, the speed adjusting groove 219 may be formed to have a predetermined length and width. The speed adjusting groove 219 forms a space therein, and therefore, forms a space between the outer surface of the blade 531 and thus the viscous fluid can be moved through the speed adjusting groove 219.

As the space of the speed control groove 219 is larger, a large amount of viscous fluid is movable, so that the rotational speed of the damper part 520 may be increased. On the contrary, the smaller the space of the speed adjusting groove 219, the slower the rotational speed of the damper portion 520.

The rotational speed of the damper part 520 may be controlled by the depth and width of the speed control groove 219 and the depth and width of the flow path groove 525 formed in the body 521 of the damper part 520. In addition, the rotational speed of the damper unit 520 may be adjusted differently for each angular section according to the length of the speed control groove 219.

Hereinafter, an operation example of the door rotating device will be described.

7 and 8 are planar views showing an operation example of the second shaft portion of the door rotating apparatus according to an embodiment of the present invention, Figure 9 is a first shaft portion of the door rotating apparatus according to an embodiment of the present invention 10 is an exploded perspective view showing an operation example, Figure 10 is an exploded perspective view showing a state in which the door rotating device and the bracket is coupled, Figure 11 is a refrigerator door rotating device according to an embodiment of the present invention Exemplary diagram showing a state coupled to. Here, FIG. 9 shows an operation example of the first shaft portion in each operating state of FIG.

The door rotating apparatus 100 may be mounted on all articles provided with doors, but for convenience, the door rotating apparatus 100 is described as an example in which the door rotating apparatus 100 is mounted in the refrigerator.

First, as shown in FIGS. 10 and 11, as the extension part 312 of the rotary cam 310 (see FIG. 9) is coupled to the first coupling hole 810 formed in the bracket 800, the door rotating apparatus 100 may be coupled to the bracket 800.

The bracket 800 may be formed with a second coupling hole 820, and as the coupling member (not shown) coupled to the second coupling hole 820 is coupled to the main body 910 of the refrigerator 900, the bracket The 800 may be fixed to the main body 910 of the refrigerator 900.

At this time, since the extension portion 312 of the rotary cam 310 is coupled to the first coupling hole 810 of the bracket 800 so as not to rotate, the rotary cam 310, the first shaft 320 and The first gear 610 (see FIG. 7) is to be kept in a fixed state.

The housing 200 may be coupled to the inside of the door 920, and may rotate in conjunction with the door 920. In this case, the door 920 and the housing 200 are rotated about the first shaft 320 (see FIG. 9).

Meanwhile, as shown in FIGS. 7A and 9A, when the door 920 is in the state in which the main body 910 is closed, the viscous fluid contained in the second space part 212 is pressurized. This is in equilibrium. In this case, the blade 531 may not be tilted in the close contact groove 524. Here, the state where the blade 531 is not tilted means that the third contact surface 532 and the fourth contact surface 533 of the blade 531 adhere to the first contact surface 527 and the second contact surface of the contact groove 524. It may mean a state that is not in close contact with the surface 528. In this case, the first cam 313 of the rotary cam 310 and the second cam 335 of the sliding cam 330 may be in a state of being in close contact with each other.

When the door 920 rotates to open the main body 910, the housing part 200 also rotates. As shown in FIG. 7B, when the housing part 200 rotates in one direction, since the second shaft part 500 (see FIG. 4) rotates in association with the housing part 200, the first gear The second gear 620 coupled to the 610 is rotated about the first shaft 320.

As the second gear 620 is rotated, the damper part 520 rotates about the second shaft 510 because the second shaft 510 also rotates. That is, when the housing part 200 rotates about the first axis 320, the second axis part rotates about the first axis 320 and rotates about the second axis 510. At the same time.

In one embodiment of the present invention, the gear ratio of the first gear 610 and the second gear 620 may be one. That is, the first gear 610 and the second gear 620 may be the same. When the gear ratio is 1, when the housing part 200 rotates 45 degrees in one direction about the first shaft 320, the second gear 620 is rotated by 45 degrees in one direction. Can be rotated about 90 degrees. In this case, the blade 531 of the damper unit 520 may be located near one end of the speed control groove 219.

While the damper part 520 is rotated, the fourth contact surface 533 of the blade 531 may be pressed by the viscous fluid accommodated in the front space in the rotational movement direction of the blade 531. In addition, the blade 531 may be tilted so that the front end portion is lifted by the pressing force applied to the fourth contact surface 533 by the viscous fluid. Accordingly, the third contact surface 532 of the blade 531 may be in close contact with the first contact surface 527 of the contact groove 524, the third contact surface 532 and the first contact surface 527. Movement of the viscous fluid through may be blocked. However, in this state, since the flow path groove 525 is opened without being blocked by the blade 531, the viscous fluid can be moved to the rear space in the rotational movement direction of the blade 531 through the flow path groove 525. . Accordingly, since the damping force applied to the damper portion 520 is applied relatively small, the damper portion 520 can be rotated relatively easily.

In this case, as shown in FIG. 9B, the sliding cam 330 is also interlocked to rotate in one direction about the first axis 320. At this time, since the rotary cam 310 and the first shaft 320 is fixed, the sliding cam 330 that rotates in conjunction with the housing 200 when the rotation is rotated, the second cam 335 is the first cam ( 313 and the sliding is moved upward.

In addition, as described above, since the peaks and valleys of the first cam 313 and the second cam 335 are each formed at an angular interval of 90 degrees, the elastic member 340 is in a compressed state at this time.

On the other hand, when the external force for rotating the housing 200 in the above state is removed, that is, when the user releases the hand from the door 920, the elastic force of the elastic member 340 pushes the sliding cam 330 sliding cam 330 ) Will move downward. Therefore, the housing part 200 rotates in the opposite direction in one direction about the first shaft 320, and thus the door 920 is closed.

And, as shown in Figure 7 (c), when the housing 200 is rotated 90 degrees in one direction in the initial state (door closed), the second gear 620 is 180 based on the initial state Will also rotate. In this case, the blade 531 of the damper unit 520 may rotate in a section in which the speed adjusting groove 219 is formed. Therefore, the viscous fluid accommodated in the front of the rotation direction of the blade 531 can move to the rear of the rotation direction of the blade 531 not only through the flow path groove 525, but also through the speed adjusting groove 219. Accordingly, the damping force is generated smaller than in the previous state, and the damper portion 520 can be more easily rotated.

In addition, as shown in (c) of FIG. 9, the sliding cam 330 at this time is rotated 90 degrees with respect to the initial state. Therefore, when the housing 200 is rotated in one direction in this state, the sliding cam 330 is moved downward by the elastic force of the compressed elastic member 340 even after the external force is removed by the user. 200 may be rotated.

That is, if the user rotates the door 920 a little in the direction of closing the present time, the door 920 may be rotated and closed even if the user releases the door 920. Alternatively, if the user rotates the door 920 slightly in the direction of opening at this point, even if the user releases the door 920, the door 920 may be rotated until it is fully opened (rotated 180 degrees). .

As shown in FIG. 7D, when the housing part 200 rotates 135 degrees in one direction in the initial state, the second gear 620 rotates 270 degrees. In this case, the blade 531 of the damper unit 520 may be located at the other end portion of the speed control groove 219. In one embodiment of the present invention, the speed adjusting groove 219 is formed so that the blade 531 is located within the range of the speed adjusting groove 219 when the housing 200 is rotated in an angle range of 45 ~ 135 degrees. Can be. This allows the user to rotate the door more easily when the door 920 is in the 45 to 135 degree range. In addition, the rotational speed of the door can also be increased to provide a luxurious feel.

The length of the speed control groove 219 formed in the circumferential direction can be designed in various ways, through which the rotational speed of the door can be adjusted for each section according to the opening angle of the door.

At this time, as shown in (d) of FIG. 9, since the sliding cam 330 is moved downward by the elastic force of the elastic member 340, even if the user releases the door 920, the door 920 is It can be rotated automatically.

On the other hand, as shown in (a) of FIG. 8, when the door 920 is in the open state of the main body 910, the viscous fluid accommodated in the second space part 212 is in equilibrium with the pressure, and the blade ( 531 is in a state that is not tilted in the tight groove 524.

As shown in FIGS. 8B and 8C, when the door 920 rotates in the direction of closing the main body 910, the damper part 520 rotates about the second shaft 510. The third contact surface 532 of the blade 531 may be pressed by the viscous fluid accommodated in the front space in the rotational movement direction of the blade 531.

In addition, the blade 531 may be tilted so that the front end portion is lifted by the pressing force applied to the third contact surface 532 by the viscous fluid. Accordingly, the fourth contact surface 533 of the blade 531 may be in close contact with the second contact surface 528 of the contact groove 524, the fourth contact surface 533 and the second contact surface 528. Movement of the viscous fluid through may be blocked. In this state, since the movement of the viscous fluid through the flow path groove 525 is also blocked, the movement of the viscous fluid between the body of the damper portion 520 and the blade 531 does not occur.

On the other hand, in this case, since the blade 531 rotates in the section in which the speed adjusting groove 219 is formed, the viscous fluid received in the front of the rotation direction of the blade 531 passes through the speed adjusting groove 219 of the blade 531. It is possible to move backward in the direction of rotation.

In addition, as shown in (d) of FIG. 8, the blade 531 rotates in the section in which the speed adjusting groove 219 is not formed in the 45 degree angle section in which the door 920 rotates to seal the main body 910. do. Therefore, in this section, the viscous fluid contained in the front space in the rotational movement direction of the blade 531 can move only between the outer circumferential surface of the blade 531 and the inner surface of the second space portion 212. At this time, since the clearance between the outer circumferential surface of the blade 531 and the inner surface of the second space portion 212 is minute, the flow rate of the viscous fluid is reduced, so that the rotation of the second shaft 510 is made slowly.

That is, a relatively large damping force is generated when the door 920 is rotated to be closed than when the door 920 is rotated to open the main body 910, which may improve safety by preventing sudden rotation of the door 920. Can be. On the other hand, when the door 920 rotates in the open direction, the damping force due to the viscous fluid is reduced, so that the door 920 can be opened quickly, thereby improving user convenience.

In addition, since the damping force may be generated differently according to the rotation angle section of the door 920, the rotation speed of the door may be adjusted for each rotation section.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is represented by the following claims, and it should be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalents are included in the scope of the present invention.

Claims

A housing part having a first space part and a second space part formed separately from the first space part and accommodating viscous fluid therein;

A first shaft part provided in the first space part, forming a center of rotation of the housing part, and rotating independently of the housing part;

A second shaft part provided in the second space part and rotating independently of the housing part and provided with a damping force by the viscous fluid; And

And a gear portion having a first gear coupled to the first shaft portion, and a second gear coupled to the second shaft portion and gear-coupled with the first gear to transmit rotational force to the second shaft portion.
The method of claim 1,

The first shaft portion

One end portion is extended to the outside of the housing portion, the other end is located on the first space portion is formed with a first cam, the rotary cam is provided to rotate independently of the housing portion,

A first shaft provided in the first space in the longitudinal direction of the housing part, one end of which is coupled to the rotary cam and the other end of which is coupled to the first gear;

A sliding cam coupled to the first shaft and sliding in a longitudinal direction of the first shaft, and having a second cam corresponding to the first cam at one end thereof facing the first cam;

An elastic member provided to surround the outer side of the first shaft, one end of which is in contact with the other end of the sliding cam, and the other end of which is in contact with the engaging portion formed in the first space, to elastically support the sliding cam in the direction of the rotation cam; Door rotator to have.
The method of claim 2,

Door rotation is formed on the outer surface of the sliding cam at a predetermined interval along the circumferential direction in the longitudinal direction of the first axis, the guide groove coupled to the sliding projection is formed on the inner surface of the first space portion. Device.
The method of claim 2,

The first cam has a plurality of first hill and the first valley formed alternately along the circumferential direction door rotating apparatus.
The method of claim 4, wherein

And the second cam has a second valley and a second hill that are simultaneously engaged with each of the first hill and the first valley.
The method of claim 1,

The second shaft portion

The second space is provided in the longitudinal direction of the housing portion, one end is coupled to the coupling groove formed in the bottom portion of the second space portion, the other end is coupled to the second gear is rotated independently of the housing portion With 2 axes,

A damper unit coupled to the second shaft to pressurize the viscous fluid contained in the second space while rotating in association with the second shaft;

And a stopper coupled to the other end of the second shaft to close the second space so that the viscous fluid does not leak.
The method of claim 6,

The damper part

It is coupled to the second axis and rotates together with the second axis, including a close contact groove and a portion formed in the longitudinal direction of the second axis and formed deeper than the close contact groove to move the viscous fluid A body having a flow path groove forming a flow path,

It is coupled to the close groove, having a blade that is pressed by the viscous fluid during the rotation of the body to selectively open and close the flow path groove while tilting (tilting) to hear the front end portion in the rear of the rotation direction of the body Door rotator.
The method of claim 7, wherein

The close contact groove

It has a central groove formed in the longitudinal direction of the body, and the first contact surface and the second contact surface respectively formed on both sides of the central groove, the flow path groove includes a portion of the first contact surface and the center groove Door rotating device is formed to be connected to.
The method of claim 8,

The blade is

And a third contact surface closely contacting the first contact surface when the blade is tilted in one direction and a fourth contact surface closely contact the second contact surface when the blade is tilted in the other direction.
The method of claim 7, wherein

The second space portion has a predetermined length along the circumferential direction of the second space portion, the outer surface is a door rotating device is formed in contact with the protruding portion formed to contact the body.
The method of claim 10,

The inner circumferential surface of the second space portion is a door rotating device having a speed adjusting groove having a predetermined length and width in the rotational direction of the second axis facing the close contact portion.
The method of claim 1,

And the housing part has a first housing having the first space part and the second space part, and a second housing coupled to the first housing so that the gear part is provided inside.