阅读说明：本技术 冰箱 (Refrigerator with a door ) 是由 大坪熟 吉田淳二 汉健太郎 于 2019-02-01 设计创作，主要内容包括：这里公开一种冰箱,该冰箱具有一结构,该结构在冰箱的制造中被组装并配置为减少施加到驱动轨道的驱动单元的负荷,尽管轨道的位置相对于冰箱主体偏移。该冰箱包括：主体；储藏室,设置在主体内部并提供有开口；抽屉,配置为打开和关闭储藏室的开口；以及滑动装置,配置为抵靠储藏室可滑动地支撑抽屉,并且滑动装置包括第一轨道、第二轨道和驱动单元,该第一轨道安装在储藏室的内壁上,该第二轨道安装在抽屉上并配置为相对于第一轨道可滑动,该驱动单元安装在第一轨道上并配置为提供驱动力以使第二轨道滑动。(Disclosed herein is a refrigerator having a structure that is assembled in the manufacture of the refrigerator and configured to reduce a load applied to a driving unit that drives a rail, although the position of the rail is offset with respect to a refrigerator main body. The refrigerator includes: a main body; a storage chamber provided inside the main body and provided with an opening; a drawer configured to open and close an opening of the storage compartment; and a sliding device configured to slidably support the drawer against the storage compartment, and the sliding device includes a first rail mounted on an inner wall of the storage compartment, a second rail mounted on the drawer and configured to be slidable with respect to the first rail, and a driving unit mounted on the first rail and configured to provide a driving force to slide the second rail.)

1. A refrigerator, comprising:

a main body;

a storage chamber disposed inside the main body and including an opening;

a drawer configured to open and close the opening of the storage compartment; and

a slide configured to slidably support the drawer against the storage compartment, the slide comprising:

a first rail installed on an inner wall of the storage compartment,

a second rail mounted on the drawer and configured to be slidable with respect to the first rail, an

A driving unit mounted on the first rail and configured to provide a driving force to slide the second rail.

2. The refrigerator according to claim 1, wherein the driving unit is coupled to a lower surface of the first rail.

3. The refrigerator according to claim 1, wherein the driving unit is spaced apart from the inner wall of the storage chamber.

4. The refrigerator according to claim 1, wherein the sliding device further comprises a power transmission unit configured to transmit a driving force of the driving unit to the second rail.

5. The refrigerator according to claim 4, wherein the driving unit comprises:

a housing coupled to a lower surface of the first rail;

a driving motor disposed inside the housing; and

a driving gear disposed outside the case and configured to transmit a driving force of the driving motor to the power transmission unit.

6. The refrigerator of claim 5, wherein:

the first rail includes a first end disposed in a front of the storage compartment adjacent to the opening and a second end disposed in a rear of the storage compartment, and

the drive gear is adjacent the first end.

7. The refrigerator of claim 5, wherein the power transmission unit includes a first rack gear mounted on the second rail and configured to mesh with the driving gear.

8. The refrigerator of claim 7, wherein the power transmission unit includes an elastic member disposed between the first rail and the second rail to press the first rack gear against the driving gear.

9. The refrigerator of claim 7, wherein the power transmission unit includes an elastic member disposed between the first rail and the second rail to press the first rack gear against the driving gear.

10. The refrigerator of claim 9, wherein:

the second rail includes a plurality of holes elongated in a direction parallel to a direction in which the first rack gear moves relative to the second rail, and

the first rack gear includes a plurality of screw members configured to pass through and be movable along the plurality of holes.

11. The refrigerator of claim 10, wherein:

the plurality of holes includes a first hole and a second hole, and

the first and second apertures include different lengths in the direction parallel to a direction in which the first rack gear moves relative to the second track.

12. The refrigerator of claim 5, wherein:

the drive unit includes a receiving portion recessed on an outer surface of the housing and configured to receive the drive gear therein; and

a cover coupled to the housing to cover at least a portion of the receiving portion.

13. The refrigerator of claim 12, wherein the drive unit further comprises a discharge portion configured to communicate with the receiving portion and extend from the receiving portion to a lower side.

14. The refrigerator of claim 7, wherein the first rack gear is disposed above the drive gear.

15. The refrigerator of claim 1, wherein the sliding device further comprises an adjusting unit provided at a rear side of the power transmission unit to adjust a moving distance of the second rail with respect to the first rail.

Technical Field

The present disclosure relates to a refrigerator.

Background

In a conventional manner, a refrigerator having a drawer has been used. For example, patent document 1 discloses a refrigerator provided with a refrigerator main body having a storage chamber, a drawer opening and closing the storage chamber, and a sliding device sliding the drawer against the storage chamber in an opening and closing direction (against).

The sliding apparatus of the refrigerator disclosed in patent document 1 is provided with a first rail mounted on a refrigerator main body and a second rail mounted on a drawer. The second rail slides against the first rail in opening and closing directions by a driving unit installed on the refrigerator main body.

Disclosure of Invention

Technical problem

Therefore, if the first rail and the driving unit are not installed with high accuracy when the refrigerator is manufactured, the second rail presses the driving unit, and an excessive load is applied to the driving unit. Therefore, high precision assembly is used in manufacturing the refrigerator.

Further, even if the first rail and the drive unit are assembled with high accuracy, when a positional deviation occurs in the first rail due to deterioration over time, the second rail presses the drive unit, and an excessive load is applied to the drive unit.

Further, when the load applied to the drawer is changed according to an increase or decrease in the amount of an object (e.g., food) contained in the drawer, a positional deviation of the first rail may also occur.

Technical solution to the problem

Accordingly, it is an aspect of the present disclosure to provide a refrigerator having a structure configured to be relatively easily assembled in the manufacture of the refrigerator and configured to reduce a load applied to a driving unit driving a rail although a position of the rail is shifted with respect to a refrigerator main body due to deterioration over time or deterioration caused by a change in weight of an object stored in a drawer (according to an increase or decrease in the amount of the object).

Additional aspects of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.

According to an aspect of the present disclosure, a refrigerator includes: a main body; a storage chamber provided inside the main body and provided with an opening; a drawer configured to open and close an opening of the storage compartment; and a sliding device configured to slidably support the drawer against the storage compartment, the sliding device including a first rail mounted on an inner wall of the storage compartment, a second rail mounted on the drawer and configured to be slidable with respect to the first rail, and a driving unit mounted on the first rail and configured to provide a driving force to slide the second rail.

The driving unit may be coupled to a lower surface of the first rail.

The driving unit may be spaced apart from an inner wall of the storage chamber.

The sliding apparatus may further include a power transmission unit configured to transmit the driving force of the driving unit to the second rail.

The driving unit may include: a housing coupled to a lower surface of the first rail; the driving motor is arranged inside the shell; and a driving gear disposed outside the housing and configured to transmit a driving force of the driving motor to the power transmission unit.

The first track may include: a first end disposed in a front of the storage compartment adjacent to the opening; and a second end disposed in a rear portion of the storage chamber, and the driving gear may be adjacent to the first end.

The power transmission unit may include a first rack gear mounted on the second rail and configured to mesh with the driving gear.

The power transmission unit may include at least one elastic member disposed between the first rail and the second rail to press the first rack gear against the driving gear.

The first rack gear may be coupled to the second rail to be relatively movable in a direction perpendicular to a direction in which the drawer opens and closes the opening of the storage compartment.

The second rail may include a plurality of holes elongated in a direction parallel to a direction in which the first rack gear moves relative to the second rail, and the first rack gear may include a plurality of screw members configured to pass through the plurality of holes and configured to be movable along the plurality of holes, respectively.

The plurality of holes may include a first hole and a second hole, and the first hole and the second hole may have different lengths in a direction parallel to a direction in which the first rack gear moves relative to the second rail.

The driving unit may include: a receiving portion recessed on an outer surface of the housing and configured to receive the driving gear therein; and a cover coupled to the housing to cover at least a portion of the receiving portion.

The driving unit may further include a discharge portion configured to communicate with the receiving portion and extend from the receiving portion to a lower side.

The first rack gear may be disposed above the drive gear.

The sliding apparatus may further include an adjustment unit provided at a rear side of the power transmission unit to adjust a moving distance of the second rail with respect to the first rail.

The adjusting unit may include: the second rack gear is arranged on the first track; a shaft rotatably supported by the second rail; and an adjustment gear provided at both ends of the shaft and configured to mesh with the second rack gear.

The second rack gear may be disposed above the adjustment gear.

The second rack gear may be disposed opposite to the first rack gear with respect to the adjustment gear.

The sliding device may further include a sliding rail disposed between the first rail and the second rail and configured to slide the second rail against the first rail.

The storage chamber may include a protruding portion formed such that a portion of an inner wall of the storage chamber protrudes toward the opening, and the first rack gear may be disposed above the protruding portion inside the storage chamber.

Advantageous effects of the invention

Since assembly can be relatively easily performed in the manufacture of the refrigerator, the quality of the refrigerator can be constantly maintained, and the load applied to the driving unit driving the rails can be reduced although the positions of the rails are shifted with respect to the refrigerator main body due to deterioration over time or deterioration caused by a change in the weight of the objects stored in the drawer (according to an increase or decrease in the amount of the objects).

Drawings

For a more complete understanding of the present disclosure and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which like reference numbers indicate like parts:

fig. 1 illustrates a perspective view of a refrigerator according to one embodiment of the present disclosure;

fig. 2 illustrates a longitudinal section of a lower portion of a refrigerator according to one embodiment of the present disclosure;

fig. 3 illustrates an exploded perspective view of a sliding apparatus installed in a refrigerator according to one embodiment of the present disclosure;

fig. 4 illustrates a perspective view illustrating one side (opening direction) end of a sliding apparatus installed in a refrigerator according to one embodiment of the present disclosure;

fig. 5 illustrates a perspective view illustrating the other side (closing direction) end of the sliding apparatus installed in the refrigerator according to one embodiment of the present disclosure;

fig. 6 illustrates a view showing a sliding apparatus mounted on both side walls of a refrigerator according to an embodiment of the present disclosure;

FIG. 7 shows a perspective view of a modified embodiment of a housing of a drive unit according to one embodiment of the present disclosure;

FIG. 8 illustrates a side view of a modified embodiment of a power transfer unit according to one embodiment of the present disclosure;

FIG. 9 shows a view of a modified embodiment of a sliding track according to one embodiment of the present disclosure; and

fig. 10 shows a view of a modified embodiment of a sliding device according to an embodiment of the present disclosure.

Detailed Description

It may be beneficial to set forth definitions of certain words and phrases used throughout this patent document: the terms "include" and "comprise," as well as derivatives thereof, mean inclusion without limitation; the term "or" is inclusive, meaning and/or; the phrases "associated with … …" and "associated therewith," as well as derivatives thereof, may mean including, included within, interconnected with … …, inclusive, included within, connected to or with … …, coupled to or with … …, in communication with … …, cooperating with … …, interleaved, juxtaposed, adjacent to … …, incorporated into or in conjunction with … …, having properties of … …, or the like; the term "controller" means any device, system or part thereof that controls at least one operation, and such a device may be implemented in hardware, firmware or software, or some combination of at least two of the same. It should be noted that the functionality associated with any particular controller may be centralized or distributed, whether locally or remotely.

Also, the various functions described below can be implemented or supported by one or more computer programs, each formed from computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, sets of instructions, procedures, functions, objects, classes, instances, related data, or a portion thereof adapted for implementation in suitable computer readable program code. The phrase "computer readable program code" includes any type of computer code, including source code, object code, and executable code. The phrase "computer readable medium" includes any type of medium capable of being accessed by a computer, such as Read Only Memory (ROM), Random Access Memory (RAM), a hard disk drive, a Compact Disc (CD), a Digital Video Disc (DVD), or any other type of memory. A "non-transitory" computer-readable medium does not include a wired, wireless, optical, or other communication link that transmits transitory electrical or other signals. Non-transitory computer readable media include media capable of permanently storing data as well as media capable of storing data and subsequently rewriting, such as rewritable optical disks or erasable memory devices.

Definitions for certain words and phrases are provided throughout this patent document. Those of ordinary skill in the art should understand that in many, if not most instances, such definitions apply to prior, as well as future uses of such defined words and phrases.

Figures 1 through 10, discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged system or device.

The embodiments described in the present disclosure and the configurations shown in the drawings are merely examples of the embodiments of the present disclosure and may be modified in various different ways at the time of filing the present application to replace the embodiments and drawings of the present disclosure.

As shown in fig. 1 and 2, the refrigerator 100 according to one embodiment includes a refrigerator main body 10, a storage chamber R1 provided inside the refrigerator main body 10 and provided with an opening 15, a drawer 20 slidably coupled to the storage chamber R1 to open and close the opening 15, and a slide device 30 configured to movably support the drawer 20 against the storage chamber R1.

The refrigerator main body 10 has a plurality of storage chambers other than the storage chamber R1, and a mechanical chamber R2 in which a device such as a compressor is provided behind the storage chamber R1.

A protruding portion 12 that protrudes toward the opening direction (front) side is formed in an inner wall 11 that separates the storage chamber R1 from the machine chamber R2. Therefore, the storage room R1 is formed such that, in the direction in which the drawer slides (hereinafter referred to as the first direction), the upper region on which the protruding portion 12 is not formed is longer than the lower region on which the protruding portion 12 is formed.

The drawer 20 has a door panel 21 blocking the opening 15 of the storage room R1.

As shown in fig. 3 to 5, the sliding device 30 includes: a pair of first rails 40 provided on the respective side walls 13 of the storage room R1; a pair of second rails 50 provided on the door panel 21 of the drawer 20; a slide rail 60 disposed between the first rail 40 and the second rail 50 and configured to slide the second rail 50 against the first rail 40; a driving unit 70 mounted on the first rail 40; and a power transmission device 80 configured to transmit power of the driving unit 70 to the second rail 50.

The first rail 40 is fixed to both side walls 13 of the storage room R1 and elongated in a first direction. The first rail 40 is installed in an upper region of the storage room R1. One end 40b of the rear side of the first rail 40 is disposed above the protruding portion 12.

The first rail 40 includes a fixing portion 41 fixed to the side wall 13 of the storage chamber R1 and a pair of supporting portions 42 extending from upper and lower sides of the fixing portion 41 to a direction perpendicular to the side wall 13.

The driving unit 70 is installed in the first rail 40.

The driving unit 70 includes a housing 71 provided in the first rail 40, a driving motor (not shown) provided inside the housing 71, and a transmission gear (not shown) configured to transmit torque of the driving motor (not shown).

The housing 71 is provided on the lower surface of the lower support portion 42b of the first rail 40.

Inside the housing 71, a driving motor (not shown) and a transmission gear (not shown) configured to transmit torque of the driving motor (not shown) are installed.

A driving gear 72 that drives the second rail 50 by receiving torque from a transmission gear (not shown) is installed on an outer surface of the housing 71. The drive gear 72 is mounted in a concave portion 73 formed on the outer surface of the housing 71 and is provided at one end 40a of the front side of the first rail 40. The drive gear 72 is disposed adjacent to the opening 15 of the storage chamber R1.

The case 71 is connected to the storage chamber R1 through the first rail 40, but the case 71 itself is not directly coupled to the storage chamber R1.

The case 71 is spaced apart from the side wall 13 of the storage chamber R1 and thus from the refrigerator main body 10, wherein dimensional deviation may occur during the manufacture of the refrigerator.

According to one embodiment, the structure in which the housing 71 is manufactured separately from the first rail 40 and then mounted on the first rail 40 has been described. Alternatively, a structure may be adopted in which the housing 71 and the first rail 40 are integrally formed.

Although not shown, a concave receiving portion is formed on an inner surface of the storage chamber R1, specifically, on an inner surface of the side wall 13 adjacent to the case 71 of the storage chamber R1. A processor (not shown) including a substrate for controlling the driving motor disposed in the housing 71 may be disposed in the receiving portion, and thus a wiring process to be connected to the motor is easily performed.

The second rails 50 are installed to extend parallel to each other from both sides of the back surface (rear surface) of the door panel 21. Between the two second rails 50, a storage box C for storing products is supported.

The second rail 50 is formed by bending a long plate member in its longitudinal direction a plurality of times. Specifically, the second rail 50 is bent such that a center line 51 facing the first rail 40 protrudes toward the first rail 40. The center line 51 protrudes further toward the first rail 40 than the upper line 52a and the lower line 52 b.

A driving rack gear 81 forming a power transmission device 80 described later is provided on the lower side line 52b of the second rail 50. In a state where the driving rack gear 81 is mounted in the second rail 50, the driving rack gear 81 is disposed such that the teeth of the driving rack gear 81 are directed downward.

The driving rack gear 81 is engaged with the driving gear 72 of the driving unit 70 formed on the first rail 40, so that the power of the driving motor (not shown) can be transmitted to the second rail 50.

The driving rack gear 81 is mounted on the second rail 50 such that the distance between the top face of the teeth of the driving rack gear 81 and the top face of the teeth of the driving gear 72 is 5mm or less. Therefore, an accident in which a finger is caught between the driving rack gear 81 and the driving gear 72 can be prevented.

The driving rack gear 81 further includes a screw member 54 passing through a plurality of holes 53 formed in the lower line 52b of the second rail 50.

Each of the plurality of holes 53 extends in a direction intersecting with (perpendicular to in the present embodiment) the first direction. Each screw member 54 is configured to be slidable relative to the plurality of holes 53. Therefore, the driving rack gear 81 can slide along the plurality of holes 53 in a direction intersecting (perpendicular to) the first direction.

A plurality of elastic members 82 are provided on one surface of the driving rack gear 81 facing the lower step formed by the center line 51 and the lower line 52b of the second rail 50. The driving rack gear 81 is pressed against the driving gear 72 by the elastic member 82.

The power transmission device 80 includes a driving rack gear 81 and the plurality of elastic members 82.

The slide rail 60 includes an outer member 61 fixed to the first rail 40, an inner member 62 fixed to the second rail 50, and an intermediate member 63 disposed between the outer member 61 and the inner member 62.

Intermediate member 63 is configured to be slidable by a ball 64 provided between outer member 61 and inner member 62.

The outer member 61 has a length substantially equal to that of the first rail 40 in the first direction, and is fixed between the support portions 42a and 42b of the first rail 40 by being interposed between the support portions 42a and 42b of the first rail 40.

The inner member 62 has a length substantially equal to the length of the first rail 40 in the first direction and is fixed to the center line 51 of the second rail 50. One end of the rear side of the inner member 62 protrudes further toward the rear of the storage room R1 than the second rail 50.

Since the outer member 61 is a member fixed to the first rail 40 rather than being slidable on the first rail 40, it can be assumed that the outer member 61 is contained in the first rail 40.

In the same manner, since the inner member 62 is a member fixed to the second rail 50 rather than being slidable on the second rail 50, it can be assumed that the inner member 62 is contained in the second rail 50.

That is, the first rail 40 represents a member that does not slide against the refrigerator main body 10 among members forming the sliding device 30, and the second rail 50 represents a member forming the sliding device 30 that does not slide against the drawer 20.

The ball 64 corresponds to the rolling mechanism 60a, and the rolling mechanism 60a is configured to smoothly slide the second rail 50 against the first rail 40.

The sliding device 30 further includes an adjusting unit 90, and the adjusting unit 90 is configured to adjust the moving distances of the respective second rails 50 sliding against the respective first rails 40 to be equal to each other.

The adjusting unit 90 includes: an adjustment rack gear 91 provided on each first rail 40; a shaft 92 supported by the two second rails 50; and adjustment gears 93 fixed to both ends of the shaft 92 and engaged with the adjustment rack gears 91.

The adjustment rack gear 91 is provided on the upper support portion 42a of the first rail 40. In a state where the adjustment rack gear 91 is mounted in the first rail 40, the adjustment rack gear 91 is disposed such that the teeth of the adjustment rack gear 91 are directed downward.

The shaft 92 is rotatably supported on each rear end of the inner member 62 protruding from the second rail 50 toward the rear of the storage chamber R1.

The adjustment gear 93 is fixed to the shaft 92 such that the adjustment gear 93 is not rotatable about the shaft 92. Each of the adjustment rack gears 91 is configured to mesh with adjustment gears 93 fixed to both ends of the shaft 92.

The teeth of the two adjusting rack gears 91 and the teeth of the two adjusting gears 93 are arranged to have the same pitch. Therefore, when the shaft 92 rotates about the inner member 62, the moving speed of the regulating gear 93 engaged with one regulating rack gear 91 is substantially equal to the moving speed of the regulating gear 93 engaged with the other regulating rack gear 91.

The regulation rack gear 91 is arranged in parallel with the driving rack gear 81 in the vertical direction. Therefore, the top faces of the teeth of the regulation rack gear 91 and the top faces of the teeth of the driving rack gear 81 are directed downward.

The regulation gear 93 is disposed between an upper surface of the driving rack gear 81 opposite to a surface on which the teeth of the driving rack gear 81 are formed and a top surface of the teeth of the regulation rack gear 91. The adjustment gear 93 is configured to rotate and move on the upper surface of the driving rack gear 81.

One end of the regulation rack gear 91 and one end of the driving rack gear 81 extend parallel to each other to be disposed above the protruding portion 12 of the storage chamber R1.

When the second rail 50 provided on the drawer 20 is engaged with the first rail 40 provided in the storage room R1, the lower line 52b of the second rail 50 faces the entire driving gear 72. That is, the lower end portion 50a of the second track 50 extends further downward than the lower end portion of the top face of the teeth of the drive gear 72. Since the driving gear 72 is covered by the second rail 50, injury due to the user's finger being caught can be prevented.

Next, a sliding operation of the drawer 20 of the refrigerator 100 according to an embodiment will be described.

When an opening signal is received from an operating portion (not shown) provided on the front side of the drawer 20, the driving motor is rotated in a state where the drawer 20 completely closes the storage chamber R1. The torque of the driving motor is transmitted to the driving gear 72 via the transmission gear, and the torque transmitted to the driving gear 72 is transmitted to the second rail 50 through the driving rack gear 81 engaged with the driving gear 72. Accordingly, the drawer 20 moves in the first direction with respect to the storage room R1 to open the storage room R1. When the drawer 20 fully opens the storage room R1, a detection device (not shown) such as a position sensor detects the opening, and when a signal generated by the detection device is transmitted to a processor configured to control the driving motor, the driving motor is stopped by the processor.

When receiving the closing signal, the driving motor is rotated in a state where the drawer 20 completely opens the storage chamber R1. The torque of the driving motor is transmitted to the driving gear 72 via the transmission gear, and the torque transmitted to the driving gear 72 is transmitted to the second rail 50 through the driving rack gear 81 engaged with the driving gear 72. Accordingly, the drawer 20 moves in a second direction opposite to the first direction with respect to the storage room R1. When the drawer 20 completely closes the storage chamber R1, a detection device (not shown) such as a position sensor detects the closing, and when a signal generated by the detection device is transmitted to a processor configured to control the driving motor, the driving motor is stopped by the processor.

According to the above configuration, the moving speed of the second rail 50 of one side with respect to the first rail 40 is adjusted to be substantially the same as the moving speed of the second rail 50 of the other side with respect to the first rail 40 by the adjusting unit 90 during the opening and closing of the storage room R1 by the drawer 20, thereby reducing the unbalance in both lateral directions (left and right sides) of the drawer 20.

When the drawer 20 moves in the first direction to open the storage chamber R1, the drawer 20 has its front portion inclined downward due to its own weight. At this time, as the drawer 20 changes from the fully closed state to the fully open state of the storage room R1, the inclination angle of the drawer 20 increases. Due to the inclination of the drawer 20, the second rail 50 (specifically, the front end side of the second rail 50 adjacent to the opening 15) is inclined downward with respect to the first rail 40. Therefore, the driving rack gear 81 installed in the second rail 50 moves in a direction of pressing the driving gear 72, and an overload state occurs due to a deviation of the meshing position between the gears. Therefore, noise may be generated and the driving rack gear 81 or the driving gear 72 may be damaged.

However, according to the above configuration, since the elastic member 82 is bent by the pressing force equal to or greater than the certain level to absorb the movement of the driving rack gear 81 caused by the inclination of the drawer 20, the engagement between the driving rack gear 81 and the driving gear 72 is constantly maintained, and thus the driving gear 72 is overloaded no more than necessary.

The first rail 40 is disposed above the protruding portion 12 of the storage chamber R1, and one end of the driving rack gear 81 mounted on the first rail 40 extends to be disposed above the protruding portion 12. Further, the drive gear 72 that meshes with the drive rack gear 81 is provided adjacent to the opening 15 of the storage room R1. This makes it possible to secure a long sliding distance of the drawer 20 with respect to the storage room R1.

Fig. 7 shows a perspective view of a modified embodiment of the housing of the drive unit.

The housing 71 shown in fig. 7 has a groove communicating with the recessed portion 73 and extending downward from the recessed portion 73, and a cover 74 coupled to the housing 71 to cover at least a portion of the recessed portion 73.

By blocking the recessed portion 73 with the cover 74, only the teeth of the drive gear 72 that mesh with the drive rack gear 81 are exposed to the outside of the housing 71. A discharge portion 75 configured to allow the concave portion 73 to communicate with the outside of the housing 71 is formed in a lower portion of the cover 74.

According to the above-described structure, since the gear system including the driving gear 72 is hardly exposed to the outside of the housing 71, it is possible to prevent injury that may occur when the user's fingers are caught. Further, the foreign substances introduced into the concave portion 73 are discharged from the discharge portion 75, and thus the driving unit 70 may be prevented from being abnormally operated or damaged due to the foreign substances.

Fig. 8 shows a side view of a modified embodiment of the power transfer unit.

In the second rail 50 as shown in fig. 8, the plurality of holes 53 configured to couple the driving rack gear 81 to the second rail 50 include a first hole 53a and a second hole 53b, wherein the first hole 53a and the second hole 53b have different lengths in a direction parallel to a direction in which the driving rack gear 81 moves with respect to the second rail 50.

The first hole 53a is disposed adjacent to the opening 15 of the storage room R1, and the second hole 53b is disposed adjacent to the rear side of the storage room R1. The length of the second hole 53b is longer than the length of the first hole 53 a.

As described above, when the drawer 20 is taken out of the storage chamber R1, the door panel 21 side has the front portion inclined downward due to the weight of the drawer 20. The second rail 50 is inclined with respect to the first rail 40 due to the inclination of the drawer 20, and thus the driving rack gear 81 mounted on the second rail 50 is moved in a direction of pressing the driving gear 72. As the drawer 20 is taken out more from the storage room R1, the driving rack gear 81 is moved more in the direction of pressing the driving gear 72. However, by using the above configuration, it is possible to secure a sufficiently long movable range of the driving rack gear 81, thereby alleviating a load applied to the driving gear 72 when the drawer 20 is taken out over a relatively long distance. Further, when the drawer 20 is taken out through a relatively short distance, a small movable range of the driving rack gear 81 can be secured to maintain the engagement between the driving rack gear 81 and the driving gear 72.

In another embodiment, the drive gear 72 is provided to be movable relative to the housing 71 in a direction (in a direction perpendicular to the first direction) in which the drive gear 72 is in contact with the drive rack gear 81 and is separated from the drive rack gear 81. The driving unit 70 may include an elastic member (not shown) that presses the driving gear 72 toward the driving rack gear 81.

In this case, the housing 71 includes a hole (not shown) through which a rotation shaft (not shown) of the driving gear 72 passes, and the hole is elongated in a direction in which the driving gear 72 contacts the driving rack gear 81 and separates from the driving rack gear 81. The rotation shaft is configured to be movable along the hole, and the rotation shaft itself may have elasticity.

A structure may be applied in which the entire gear system (not shown) including the driving motor installed inside the housing 71 is pressed upward by the elastic member, and the driving gear 72 is pressed by the driving rack gear 81 through the rotation shaft of the driving gear 72 included in the gear system.

Further, as shown in fig. 6, the sliding rail 60 according to one embodiment has a structure in which each member 61, 62, and 63 manufactured by bending a long plate member to have an approximately "U" -shaped section is coupled to each other.

The side edges 61a, 62a, and 63a extending in the longitudinal direction of the respective members 61, 62, and 63 are arranged such that the side edge 63a of the intermediate member 63 is disposed outside the side edge 62a of the inner member 62 and the side edge 61a of the outer member 61 is disposed outside the side edge 63a of the intermediate member 63.

Further, the balls 64 may be disposed between the side edge 62a of the inner member 62 and the side edge 63a of the intermediate member 63 and between the side edge 63a of the intermediate member 63 and the side edge 61a of the outer member 61, so that the inner member 62 and the intermediate member 63 may be slidable.

Fig. 9 shows a view of a modified embodiment of the slide rail.

As shown in fig. 9, according to this modified embodiment, in the same manner as the one embodiment, the outer member 61 and the inner member 62 are formed by being bent to have a substantially "U" shaped cross section, and the intermediate member 63 is formed by being bent to have a substantially "W" shaped cross section.

The side edges 61a, 62a, and 63a extending in the longitudinal direction of the respective members 61, 62, and 63 are arranged such that the side edge 63a of the intermediate member 63 bent to have a substantially "V" -shaped section is disposed outside the side edge 62a of the inner member 62 and the side edge 61a of the outer member 61 is disposed in a groove of the side edge 63a of the intermediate member 63.

Further, the balls 64 may be disposed between the side edge 62a of the inner member 62 and the side edge 63a of the intermediate member 63 and between the side edge 63a of the intermediate member 63 and the side edge 61a of the outer member 61, so that the inner member 62 and the intermediate member 63 may be slidable.

The sliding track 60 may further comprise a stop 65, which stop 65 prevents the respective members 61, 62, 63 from separating from each other.

Stoppers 65 are provided at both ends of the inner member 62 and both ends of the intermediate member 63, and are provided on one surface of the intermediate member 63 facing one surface of the inner member 62 and one surface of the inner member 62. The stoppers 65 provided in the inner member 62 and the intermediate member 63 are arranged so that the inner member 62 and the intermediate member 63 interfere with each other in a state where the inner member 62 is moved by a predetermined length relative to the intermediate member 63.

Further, stoppers 65 are provided at both ends of the outer member 61 and both ends of the intermediate member 63, and on one surface of the intermediate member 63 facing one surface of the outer member 61 and one surface of the outer member 61. The stoppers 65 provided in the outer member 61 and the intermediate member 63 are arranged so that the outer member 61 and the intermediate member 63 interfere with each other in a state where the intermediate member 63 is moved by a predetermined length relative to the outer member 61.

The slide rail 60 may further include a guide groove 66, and the stopper 65 is inserted into the guide groove 66 and moves in the guide groove 66.

In the above embodiment, the first rail 40 and the second rail 50 are connected via the sliding rail having the three members 61, 62, and 63, and thus the drawer 20 is taken out of the storage chamber R1 in two stages. However, the drawer 20 may be taken out of the storage room R1 through one stage by using a single slide rail, or the drawer 20 may be taken out of the storage room R1 through three or more stages by using other types of slide rails.

Fig. 10 shows a view of a modified embodiment of the sliding device.

As shown in fig. 10, the slide rail 60 includes: a guide rail 68 installed in the first rail 40; and a roller 69 rotatably installed in the second rail 50 and rolling along the guide rail 68. The roller 69 corresponds to the rolling mechanism 60a, and the rolling mechanism 60a is configured to facilitate the sliding movement of the second rail 50 against the first rail 40.

The guide rail 68 is a member that does not slide against the first rail 40, and the roller 69 is a member that does not slide against the second rail 50.

The second rail 50 is formed in an "L" shape by bending an elongated plate member in a longitudinal direction thereof and is provided with a mounting rail 67, the mounting rail 67 being configured to mount a driving rack gear 81 on a surface facing the first rail 40.

The drive gear 72 of the drive unit 70 is configured to move in a direction of contacting or separating with the drive rack gear 81 mounted in the mounting rail 67.

According to one embodiment, the adjusting gear 93 of the adjusting unit 90 is provided at the drawer 20 side (specifically, at the second rail 50 side), and the adjusting rack gear 91 is installed at the refrigerator main body 10 side (specifically, at the first rail 40 side), but is not limited thereto. Therefore, the opposite structure may be applied. That is, the adjusting gear 93 may be provided at the refrigerator main body 10 side and the adjusting rack gear 91 may be provided at the drawer 20 side.

Two adjusting gears 93 are coupled to the respective shafts 92 so as to be rotatable with respect to the refrigerator main body 10, and two adjusting rack gears 91 are installed to move together with the drawer 20.

By increasing the strength of the portion in which the adjustment gears 93 are provided, the shafts 92 coupled to the two adjustment gears 93 can be omitted.

As is apparent from the above description, according to the proposed refrigerator, since it can be relatively easily assembled in the manufacture of the refrigerator, the quality of the refrigerator can be constantly maintained, and the load applied to the driving unit driving the rails can be reduced, although the positions of the rails are shifted with respect to the refrigerator main body due to the deterioration over time or the deterioration caused by the change in the weight of the objects stored in the drawer (according to the increase or decrease in the amount of the objects).

While the present disclosure has been described in terms of various embodiments, various alterations and modifications may be suggested to one skilled in the art. The present disclosure is intended to embrace such alterations and modifications as fall within the scope of the appended claims.