KR100789666B1 - Link device capable for controlling height for use in refrigerator doors - Google Patents

Abstract

A link device capable of controlling height in refrigerator doors is provided to absorb a load and noises generated due to inaccurate installation of the refrigerator doors through ball joints to realize smooth automatic returning of the doors. A hinge device(20) having automatic returning power are installed at a position separated from a rotary shaft(5) of doors(3). A support bracket(11) is fixed at a main body, wherein the rotary shaft of the door is installed. A driving link(14) has one end combined with a shaft of the hinge device to transmit automatic returning power of the hinge device when the door is closed. A driven link(13) has one end combined with the other end of the driving link rotatably, and the other end combined with the support bracket rotatably to restrict the door to return centering on the rotary shaft in accordance with automatic returning of the driving link. First and second ball joints(16,17) connect both ends of the driven link to the driving link and the support bracket rotatably, and support the rotary shaft movably.

Description

Link Device Capable for Controlling Height for Use in Refrigerator Doors}

1a is a front view showing a state in which a linkage device according to the present invention and an automatic return hinge device of a door for a refrigerator using the same are installed in a two door refrigerator;

1b is an enlarged cross-sectional view of the linkage device;

1C is an exploded perspective view of the link device and the hinge device;

Figure 1d is a perspective view of the assembled state of Figure 1c,

Figure 1e is an enlarged front view showing the installation state of the linkage device when the refrigerator door is bad installation position,

2a to 2c is a flow chart showing an operating state according to the opening angle of the automatic return hinge device of the door for a refrigerator having a link device according to the present invention, respectively.

* Description of Signs for Main Parts in Drawings *

1: refrigerator 2,3: door

4,5: rotating shaft 6,7: height adjustment screw

10: linkage 11: support bracket

11b, 14a, 14b: through hole 51: shaft

12,25: fixed bolt 13: driven link

14: drive link 15: fixing bracket

16, 17: 1st, 2nd ball joint 16a, 17a: coupling bolt

16b, 17b: joint ball 16c, 17c: bearing support

16d, 17d, 18: set nut 19, 22: set screw

20: hinge 21: body

23: fixed pin 24a, 24b: thrust washer

The present invention relates to an adjustable link device, and more particularly, to a link device of a height adjustable refrigerator door that can absorb load / noise generated by incorrect installation of the refrigerator door by having a ball joint. It is about.

The hinge device is a device that connects two members so that they can be opened or contacted with each other about one axis as needed. As a representative example, a hinge device (including a movable part in a horizontal direction) used for a door and a door frame, a refrigerator, a mobile phone, etc. And a hinge device for opening and closing (including a movable part in a vertical direction) used for a laptop and the like.

A hinge hinge device having a conventional automatic return function is described in Korean Laid-Open Patent Publication No. 2001-0027832. In addition, Korean Utility Model Registration No. 0181646 discloses an example in which a hinged door opening and closing device is configured by separately configuring a hydraulic door closure and a spring door closure and using them in combination. Furthermore, in the case of the hinge device using the double camshaft proposed by the inventor in the prior patent No. 586262, in the case of the upper camshaft installed to compensate for the reduction of the closing force, as in the lower camshaft, a pair of spiral lifts It is equipped with a hall.

In addition, the automatic return hinge device proposed by the present applicant in the patent application No. 2005-69578 (July 29, 2005) is provided with a torsion spring associated with the clutch at the upper portion, and a return spring associated with the hydraulic circuit at the lower portion In addition to minimizing the diameter of the door, the closing force of the door is maximized, and an automatic return hinge device for a large or small door that can minimize the opening force at a predetermined angle is proposed.

In general, refrigerator doors are designed to close on their own when the door is open at a 45-degree angle if level. However, the bottom surface of the place where the refrigerator is installed is often not leveled, and therefore, the refrigerator mainly depends on adjusting the height adjusting screw installed at the bottom of the front to be level when installing the refrigerator. It is also common to level by holding. However, most of the spaces where refrigerators are installed in apartments are limited in advance, so it is not easy to level them, and most of them are used properly.

Therefore, when the door is opened at an angle of 45 degrees, many cases do not close by themselves. Especially when children or the elderly are inadvertently used, the door is not completely closed, resulting in a loss of cold air and increased electricity consumption. Is causing problems. Therefore, in order to solve this problem, a hinge device having an automatic return function has also been proposed in the refrigerator.

The hinge device having the automatic return function for the refrigerator proposed in the related art is installed in the inside of the door, and the rotating shaft of the door and the rotating shaft of the hinge device are used in the same form.

On the other hand, in the case of a two-door large-sized refrigerator, the water discharge hose connected to the dispenser installed in the freezer compartment is drawn out through the rotating shaft of the door, so the hinge device should be spaced apart from the interference shaft to avoid the door. Therefore, the hinge device having the automatic return function can also perform the automatic return function of the door by using the link device.

In this case, when assembling the two-door type door to the refrigerator body, the height must be installed correctly, but if it is incorrectly installed, the lower height of the two doors may be different from each other. The same problem occurs even when the differences are minutely different. In this case, if the height of one of the doors is adjusted to match the height of the two doors, the driven link of the two-stage linkage for connecting the door and the main body cannot maintain the horizontal state. The load generated on one side or the other side of the hinge device having an automatic return function does not perform a smooth operation.

For example, in Korean Patent No. 435188 and Korean Patent Publication No. 2005-91094, the hinge device is embedded at a position away from the rotating shaft of the refrigerator door, and the automatic return function is performed on the door by connecting using a linkage device and a bracket. To have.

However, in the prior art having the two-section link device as described above, since the connection structure of the driving link and the support bracket of the driven link that interconnects the two-section link is composed of a combination of bolts, pins, or nuts, the installation position of the door is In case of inaccurate or inconsistent door size, the hinge shaft with automatic return function is generated due to friction and load due to twisting the rotating shaft of connecting link between driven link, drive link and support bracket during opening / closing operation of door. There is a disadvantage that the operation is not made smoothly and noise occurs and uneven wear occurs.

In addition, conventionally has a structure that can adjust the height of the refrigerator door, especially in the double-door two-door refrigerator there is a difference in the height of the two doors to adjust the height of the door, for example, using an E-ring If the hinge device having an automatic return function for the above reason is not smooth operation.

Moreover, in the related art, when the bracket is coupled to the shaft of the hinge device, it is made in a manner of directly fixing through welding.

Accordingly, the present invention has been made to solve the above problems, the object of the present invention is to provide a ball joint that can move the pivot shaft at both ends of the driven link, even when the refrigerator door is inaccurate installation of the frame hinge and door It is to provide a link device of the door for a refrigerator door that can be absorbed by itself without adjusting the height or height of the hinge within the allowable height, and smooth operation without load / noise generation.

Another object of the present invention is to provide a linkage device capable of automatically returning to a door by absorbing it even when the height of the door is adjusted when the refrigerator has a height adjustment structure of the door.

Still another object of the present invention is to provide a linkage device capable of variously adjusting the embedding position of the hinge device by changing the length between the drive link and the driven link.

In order to achieve the above object, the present invention is provided with a hinge device for providing an automatic return force in a position spaced apart from the rotation axis of the door and fixed to the body in the link device for transmitting the automatic return force of the hinge device to the door And one end coupled to the support bracket on which the rotating shaft of the door is installed, one end coupled to the shaft of the hinge device, and a drive link to transfer the automatic return force of the hinge device when the door is closed, and one end pivotable to the other end of the drive link. A driven link coupled to the other end so as to pivot to the support bracket to restrain the door to return to an initial position based on a rotation axis according to the automatic return operation of the drive link, and both ends of the driven link and the support bracket A first ball joint and a second ball joint for pivotally supporting the pivot shaft while being pivotally connected thereto. It provides a link device, characterized by.

Here, the drive link is made of a straight lever, the driven link is made of a non-linear lever having one bent portion or the drive link and the driven link is made of a straight lever.

In addition, the support bracket is fixed to one side of the main body is fixed to one side of the lower side of the body is bent at right angles and bent at one side of the rotating shaft of the door is integrally formed, the hinge device is the lower axis of the door It is embedded in a position separated from the.

Furthermore, each of the first and second ball joints has a first through hole having an inner circumferential portion having an inwardly curved surface, and a bearing support portion fixedly coupled to one side of the driven link, and a second through hole formed at a central portion thereof, and an outer circumferential portion of the first and second ball joints. It is preferably composed of a joint ball that is supported to flow only in the first through hole of the bearing support, and a pivot shaft inserted into the second through hole of the joint ball to pivotally connect the driven link and the drive link or the support bracket. Do.

In addition, it is preferable that the joint ball has a curved diameter larger than the upper and lower inlet diameters of the inner circumferential portion of the first through hole, and the upper and lower portions respectively protrude outward from the bearing support.

The main body on which the door is supported is a household appliance, in particular a refrigerator with a dispenser.

According to another feature of the invention, the present invention is a hinge device for providing an automatic return force to a position spaced apart from the rotational axis of the refrigerator door and a link device for transmitting the automatic return force of the hinge device to the door, the refrigerator A support bracket fixed to a lower end of the main body and provided with a rotating shaft of the door, one end of which is coupled to a shaft of the hinge device, and a driving link that transmits an automatic return force of the hinge device when the door is closed; A driven link that is rotatably coupled to the other end and the other end pivotally coupled to the support bracket to restrain the door to return to its initial position about the rotation axis according to the automatic return operation of the drive link, and both ends of the driven link. Is connected to the drive link and the support bracket so that the flow of the pivot can be supported. 1 and provides a link for a refrigerator apparatus comprises a second ball joint.

The link device may be installed only in a freezer compartment door of a refrigerator having a dispenser, or installed in a freezer compartment door and a refrigerating compartment door, respectively.

In addition, the link device is coupled so that the shaft protrudes out through the through hole, and a fixing bracket for embedding and fixing the hinge device to the bottom surface of the door, the shaft protruding out through the through hole of the fixing bracket The fixing nut is coupled to the rotation is limited to one end of the drive link is fixed and coupled to the outer periphery of the fixing nut and inserted between the fixing bracket and the drive link to reduce the frictional resistance during rotation of the shaft and the drive link. It is preferred to further include at least one trust washer for.

As described above, in the present invention, the refrigerator is installed at a position spaced apart from the rotating shaft of the door and provided with ball joints at both ends of the driven link when applying the automatic return force generated by the hinge device to the door using the two-section link. The door may be installed incorrectly or absorbed even when the height of the door is adjusted in order to correct it, so that a smooth automatic return of the door may be achieved.

(Example)

Referring to the accompanying drawings, a link device according to the present invention and an automatic return hinge device of a door for a refrigerator using the same will be described in detail as follows.

1A to 1E are front views showing a state in which a link device according to the present invention and an automatic return hinge device of a door for a refrigerator using the same are installed in a two-door refrigerator, an enlarged cross-sectional view of the link device, and a link device and a hinge device, respectively. 1C is an exploded perspective view, an assembled perspective view of FIG. 1C, and an enlarged front view showing an installation state of a link device when the refrigerator door is in a poor installation position.

As shown in FIGS. 1A to 1E, the linkage device 10 according to the present invention includes a pair of hinge devices 20 embedded in lower ends of the freezer compartment and the refrigerating compartment doors 2 and 3 of the double door type refrigerator 2. The rotary shafts 4 and 5 of the doors 2 and 3 are connected to each other.

The linkage device 10 according to the present invention may be applied to a three-door refrigerator, or may be provided with only a freezer compartment door 2 in which a dispenser is installed.

When the double door type refrigerator 2 has a dispenser in the freezer door 2, a hose for discharging excess water generated therefrom to the outside of the refrigerator is moved outward through the rotation shaft 4 of the door 2. It is extended. Therefore, the hinge device 20 of the automatic return function for automatically returning when the doors 2 and 3 are within a set angle is moved from the rotation shafts 4 and 5 of the doors 2 and 3 as shown in FIG. It is installed at the bottom of the door in a spaced apart location without interference. On the lower ends of both sides of the main body 1a of the refrigerator 1, height adjusting screws 6, 7 for holding parallel when the refrigerator is installed are rotatably supported.

On the other hand, the two doors (2, 3) has the same structure as shown in Figure 1a by the rotation shaft 5 of the support bracket 11 is fixed to the lower side of the main body (1a) of the refrigerator 1 is inserted into the coupling hole (3a). And rotatably supported. Therefore, in the following description, the hinge device 20 and the link device 10 installed in the refrigerating compartment door 3 shown in FIGS. 1B to 1E will be described.

First, the linkage device 10 of the present invention has a straight lever-type drive link 14, one end of which is coupled to the shaft of the hinge device 20, and one end of the linkage device 10 through the drive link 14 and the first ball joint 16. It is pivotally connected and the other end is comprised of the curved lever type driven link 13 supported by the support bracket 11 so that rotation is possible through the 2nd ball joint 17. As shown in FIG.

The driven link 13 preferably minimizes the overlapping portion of the drive link 14. In the illustrated embodiment, the shape of the link is bent about one step to form a curve having an “L” shape. Due to the link ratio between 14) and the driven link 13, the shape is determined as "L". In addition, according to the present invention, the shape of the driven link 13 according to the embedding position of the hinge device 20 may be made of a straight lever type of "I" shape rather than "L". As a result, the shape of the driven link 13 is preferably changed in consideration of the embedding position and the link ratio of the hinge device 20.

Meanwhile, the hinge device 20 has four fixing screws on the bottom surfaces of the doors 2 and 3 in a state of being fixed using a pair of fixing screws 22 and fixing pins 23 to the fixing bracket 15. It is fixed by 19. The hinge device 20 has a fixing nut 18 coupled to the shaft 51 protruding outward through the through hole of the fixing bracket 15 to protrude outward.

In this case, the shaft 51 protruding to the outside of the hinge device 20 is cut in the same way so that both sides facing the front end are parallel to form a straight facing surface, the remaining portion is made of a structure having an opposite curved surface. The fixing nut 18 coupled thereto is also provided with a hole 18a having a shape corresponding to the tip of the shaft 51. Therefore, the fixing nut 18 coupled to the shaft 51 is limited in rotation, and the rotational force of the shaft 51 can be transmitted to the link device 20 through the fixing nut 18 having a large diameter. .

The fixing nut 18 is coupled to the shaft 51 of the hinge device 20, the drive link 14 of the link device 10 is coupled to the outer circumference of the fixing nut 18, and the exposed shaft 51 is exposed. The fixing bolt 25 is fastened to the upper side of the fixing nut 18 to block the separation. The fixing nut 18 and the drive link 14 are fixed by, for example, welding.

In this case, between the fixing bracket 15 and the drive link 14, a pair of thrust washers 24a and 24b having an inner circumference coupled to the outer circumference of the fixing nut 18 are inserted into the shaft 51 and the drive link. It is preferable to be inserted so as to reduce the frictional resistance with the fixing bracket 15 at the time of rotation of (14). However, the pair of trust washers 24a and 24b do not correspond to the essential elements and can be omitted.

On the other hand, the support bracket (11) for supporting the door (3) has a shape bent at one step at a right angle, one side is a plurality of fixing bolts 12 below the body (1a) of the refrigerator (1). It is fixedly installed, and the cylindrical rotating shaft 5 protrudes on the other side, and is inserted into the engaging hole 3a of the door 3.

The first and second ball joints 16 and 17 coupled to both ends of the driven link 13 have the same structure and the same function. The first ball joint 16 has a bearing support portion 16c fixedly coupled to one side of the driven link 13 with a first through hole 163 having an inner circumferentially inwardly curved surface.

In the first through hole 163 of the bearing support portion 16c, a second through hole 162 is formed in the center portion, and a joint ball having an outer circumferential portion having a curved shape corresponding to the inward curved surface of the first through hole 163 ( 16b) is inserted in a flowable manner and no separation occurs under normal conditions. That is, the joint ball 16b has a curved diameter larger than the upper and lower inlet diameters of the inner circumferential portion of the first through hole 163, and the upper and lower portions protrude outward from the bearing support 16c by a predetermined length, respectively. It is.

A coupling bolt 16a acting as a hinge shaft penetrates through the second through hole 162 and the through hole 14a formed at one side of the driving link 14 of the joint ball 16b, and a hexagonal fixing nut at the other end thereof. 16d is fastened, and a fixing nut 18 coupled to the shaft 51 is fixed to the other through hole 14b as described later. In this case, the head of the coupling bolt 16a is provided with a hexagon nut groove 161 for use in assembling and disassembling the ball joint.

Meanwhile, the second ball joint 17 also supports the joint ball 17b so as to be able to flow to the bearing support 17c fixed to the other side of the driven link 13, and the coupling bolt 17a is connected to the joint ball. After passing through the third through hole 172 of 17b and the through hole 11b of the support bracket 11, the hexagonal fixing nut 17d is fastened to the distal end.

Therefore, in the linkage device 10 according to the present invention, the coupling bolt 16a is driven through the first ball joint 16, that is, the joint ball 16b movably supported on one side of the driven link 13. The link 14 and the driven link 13 are pivotally connected, and the other side of the driven link 13 is connected to the support bracket 11 through a second ball joint 17 and is pivotally connected. .

As a result, in the present invention, even when the refrigerator door 3 does not have the driven link 13 and the drive link 14 of the link device 10 in a horizontal state due to a poor installation position or a poor standard as shown in FIG. 1E. The joint balls 16b and 17b of the first and second ball joints 16 and 17 can receive twisting bolts 16a and 17a serving as hinge shafts, respectively. Therefore, the hinge shaft of the connecting portion is twisted during the opening and closing operation of the doors 2 and 3 so that friction and load are not generated. As a result, noise and uneven wear occur when the hinge device 20 having the automatic return function is used. It will work smoothly.

Furthermore, in the present invention, when the refrigerator doors 2 and 3 are incorrectly installed, the refrigerator doors 2 and 3 absorb the same even when the height of the doors 2 and 3 are adjusted so that the automatic door return of the automatic return hinge device 20 can be achieved. have.

On the other hand, the hinge device 20 for providing the automatic return function of the door in combination with the linkage device 10 of the present invention can be applied as long as it has an automatic return function.

For example, the present invention can be used as long as it can be embedded in the door, including a hinge device having an automatic return function disclosed in Patent No. 538195, 586262, or Patent Application No. 2005-69578 proposed by the applicant. Do.

The automatic return hinge device 20 is, for example, the upper cap and the lower cap for closing the inside of the hinge device on the upper and lower sides of the body is press-fitted respectively.

In addition, the automatic return hinge device 20 has a shaft 51 for transmitting a return force to the door is passed through the upper cap and coupled with the fixing nut 18 as described above and the drive link 14 to the fixing nut 18. ) Is fixed by, for example, welding.

The automatic return hinge device 20 is, for example, the upper body is largely coupled to the upper cap, the lower end of the cylindrical body blocked by the lower cap coupled to the sealing, the upper end is exposed to the outside through the upper cap and the A shaft 51 extending downward, an outer circumferential surface is slidably installed along the inner circumferential surface of the body, and partitions the interior of the body into an upper / lower chamber, and the rotational force of the door 3 according to opening and closing of the refrigerator door. A rotation / linear motion conversion device for converting the rotational motion of the shaft 51 into the axial linear motion of the piston when applied to the shaft, and the lowering of the piston in conjunction with the opening and closing of the door 3, A damping device that controls the rising speed and selectively provides a damping function when the piston rises, and returns the door to its initial position upon closing of the door. To lock the rotation / linear motion converting means may be of a return means for providing a restoring force.

In this case, the return means uses a compression spring or a torsion spring having one end fixed to the upper cap, embedded in the upper body, and providing a restoring force for rotating the shaft 51 in the direction of closing the door. It is possible to include a clutch device for blocking the increase of the elastic force of the torsion spring when the opening angle exceeds the predetermined opening angle when the door is opened and closed in connection with the torsion spring, and restoring the elastic force of the torsion spring when it falls within the opening angle. In this case, when the opening angle is exceeded, the pause state is maintained at an angle set by the user.

When the clutch device is provided, when the shaft 51 rotates when the door is opened, the torsion spring is torsionally deformed in conjunction with this. When the clutch device reaches a predetermined clutching start angle of 45 °, the clutch is operated to stop the torsional deformation of the torsion spring, and only the shaft 51 is rotated to easily open the door.

At the time of automatic return of the door, the clutching operation of the clutch device is released from the opening angle of less than 45 ° so that the restoring force rotates the shaft 51 clockwise from the torsion spring in the reverse twisting state. As a result, the door is completely returned (locked) to the initial position.

However, in the automatic return hinge device used by both the return spring and the torsion spring, it is possible to set the clutching start angle of the clutch device to a desired angle, for example, it can be set to 30 degrees.

Hereinafter, the operation of the hinge device 20, which is installed at the lower end of the doors 2 and 3 and coupled with the link device 10 to provide an automatic return function to the door, will be described in detail with reference to FIGS. 2A to 2C. Explain.

A. When opening the door

In the hinge device for a refrigerator having a linking device according to the present invention, when the door is closed (that is, stopped) as shown in FIG. 2A and opened as shown in FIG. 2B, that is, the refrigerator compartment door 3 of the refrigerator opens clockwise. When the door 3 is opened, the drive link 14 of the link device 10 rotates in the counterclockwise direction, and the driven link 13 rotates in the clockwise direction.

When the drive link 14 rotates in the counterclockwise direction, the external rotational force is transmitted to the shaft 51 of the hinge device 20 connected through the fixing nut 18 to also rotate in the counterclockwise direction, thereby to the hinge device 20. The return spring or torsion spring built-in as a return means is compressed or reverse twisted to generate elastic force.

Then, when the user continues to rotate the door, as shown in Fig. 2C, the rotation of the door 3 is limited at the opening angle 135 ° by the stopper provided in the refrigerator. On the other hand, when the stopper is not provided in the refrigerator, the opening angle of the door is determined according to the structural characteristics of the drive link 14 and the driven link 13 of the linkage.

B. When closing the door

On the other hand, when closing the refrigerating compartment door 3 as shown in Figures 2c to 2a when the door opening angle is set in advance, the hinge device 20 having an automatic return function is operated to the door (3) through the link device (20) ) Provides a return force to automatically return to the initial position.

First, when the door 3 is rotated counterclockwise to the set opening angle according to the rotational force applied by the user, the drive link 14 of the link device 20 rotates clockwise and the driven link 13 counterclockwise. Rotate

In this case, the cam diagram of the elevating guide hole included in the rotation / linear motion conversion device of the hinge device 20 includes the temporary stop of the door, and when the compression spring is used, the opening angle of the door is determined by the temporary stop of the door. In case of departure, the restoring force of the compression spring applies a clockwise rotational force to the shaft 51 which provides a closing force to the door via the linkage 10 so that the door 3 automatically returns to its initial position.

In addition, when the torsion spring and the clutch device are used instead of the compression spring, when the user closes the door 3 with a predetermined force, the shaft 51 rotates clockwise so that the opening angle of the door is 45 °, the starting angle of the clutching. When the clutch device is released, the elastic restoring force of the torsion spring is applied to the shaft 51 in the clockwise direction while providing the closing force to the door through the link device 10 so that the door 3 is automatically moved to the initial position. Will return to.

That is, when the door 3 rotates counterclockwise and the compression spring or the torsion spring reaches the opening angle providing the return force, the elastic restoring force acts on the shaft 51 and the shaft 51 moves clockwise. While rotating, the fixing nut 18 coupled to the shaft 51 and the drive link 14 of the link device 10 welded and fixed to the outer circumference of the fixing nut 18 rotate together in a clockwise direction.

In addition, when the distal end of the drive link 14 is rotated in the clockwise direction with the shaft 51 as the pivot axis, the other end is rotatably supported by the support bracket 11 through the second ball joint 17. One end of the driven link 13 is pulled in a clockwise direction, so that the door 3 together with the driven link 13 is closed by rotating in a counterclockwise direction about the rotation shaft 5 of the door 3.

In this case, the refrigerator door 3 is the first and second even when the driven link 13 and the drive link 14 of the link device 10 does not form a horizontal state due to poor installation position or poor specification. The joint balls 16b and 17b of the ball joints 16 and 17 can receive twisted coupling bolts 16a and 17a serving as hinge shafts, respectively. Therefore, the hinge shaft of the connecting portion is twisted during the opening and closing operation of the doors 2 and 3 so that friction and load are not generated. As a result, noise and uneven wear occur when the hinge device 20 having the automatic return function is used. It will work smoothly.

Furthermore, in the present invention, when the refrigerator doors 2 and 3 are incorrectly installed, the refrigerator doors 2 and 3 absorb the same even when the height of the doors 2 and 3 are adjusted so that the automatic door return of the automatic return hinge device 20 can be achieved. have.

In the above embodiment, the link device and the hinge device are applied to the automatic return of the door for the refrigerator, but the link device and the hinge device having the same according to the present invention are largely modified in doors for various home appliances and building materials requiring automatic return. Applicable without

As described above, in the present invention, the refrigerator is installed at a position spaced apart from the rotating shaft of the door and provided with ball joints at both ends of the driven link when applying the automatic return force generated by the hinge device to the door using the two-section link. Even when doors such as doors are installed incorrectly or to adjust the height of doors, smooth retraction of the doors can be achieved by absorbing them without adjusting or removing the hinge heights within the allowable height of the frame hinges and doors of the refrigerator. .

In addition, in the present invention, the buried position of the hinge device can be variously adjusted by changing the length between the drive link and the driven link.

While the present invention has been illustrated and described with reference to certain preferred embodiments, the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described embodiments. Many changes and modifications will be possible to those skilled in the art.

Claims (9)

A hinge device is provided to provide an automatic return force at a position spaced apart from a rotating shaft of the door, and the link device for transmitting the automatic return force of the hinge device to the door includes: A support bracket fixed to the main body to which the door is mounted to open and close, and on which a rotating shaft of the door is installed; A drive link having one end coupled to the shaft of the hinge device to transfer an automatic return force of the hinge device when the door is closed; A driven link whose one end is pivotally coupled to the other end of the drive link and the other end is pivotally coupled to the support bracket to restrain the door to return to its initial position with respect to the axis of rotation according to the automatic return operation of the drive link; A first ball joint and a second ball joint for rotatably supporting the pivot shaft while simultaneously connecting both ends of the driven link to the driving link and the support bracket; Each of the first and second ball joints A bearing support having an inner circumference having a first through hole formed inwardly curved and fixedly coupled to one side of the driven link; A joint ball having a second through hole formed in a central portion thereof, the outer circumferential portion of the bearing support being movably supported only within the first through hole of the bearing support; And a pivot shaft inserted into the second through hole of the joint ball to pivotally connect the driven link and the driving link or the support bracket. The linkage device according to claim 1, wherein the drive link is formed of a straight lever, and the driven link is formed of a nonlinear lever having one bent portion. The linkage device according to claim 1, wherein the driving link and the driven link are formed of a straight lever. According to claim 1, The support bracket is fixed to one side of the main body is fixed to one side of the lower body is bent at right angles from one side and bent to the other side of the rotating shaft of the door is integrally formed, The hinge device is a link device, characterized in that installed at the bottom of the door at a position spaced apart from the rotation axis of the door. delete The linking device according to claim 1, wherein the joint ball has a curved diameter larger than the upper and lower inlet diameters of the inner circumferential portion of the first through hole, and the upper and lower portions respectively protrude outward from the bearing support. . The linking device according to any one of claims 1 to 4 and 6, wherein the main body on which the door is supported is a home appliance. The link device according to claim 7, wherein the home appliance is a refrigerator. According to claim 1, The shaft is coupled so as to protrude to the outside through the through hole and a fixing bracket for embedding and fixing the hinge device to the bottom surface of the door, A fixing nut in which rotation is limited to the shaft protruding to the outside through the through hole of the fixing bracket and one end of the driving link is fixed; And at least one thrust washer coupled to an outer circumference of the fixing nut and inserted between the fixing bracket and the drive link to reduce frictional resistance during rotation of the shaft and drive link.

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