KR100843164B1 - Power transmission apparatus and refrigerator using the same - Google Patents

Abstract

A refrigerator using power transmission devices is provided to improve the convenience of use by forming power transmission devices inside a home-bar door for automatically opening and closing the home-bar door. A refrigerator using power transmission devices comprises a refrigerator door(32) having an opening part(36), a home-bar door(34), and power transmission devices. The home-bar door, hinged to the opening part around a hinge(38), opens and closes the opening part. The power transmission devices, assembled to the hinge and placed inside the home-bar door, adjust the rotation of the hinge. The power transmission devices consist of a shaft assembled to the hinge, a power generator supplying the driving force to the shaft, and a friction hinge between the shaft and the power generator to control the rotation of the shaft. A permanent magnet(40) is installed at an edge of the opening part or a portion of the home-bar door contacted to the edge. An electro magnet(42) cancels the magnetic force of the permanent magnet.

Description

Power transmission apparatus and refrigerator using the same

1 is a block diagram of a power transmission device according to a first embodiment of the present invention.

2 is a perspective view showing a friction hinge according to the first embodiment of the present invention.

3 is a block diagram of a power transmission device according to a second embodiment of the present invention.

4 is a perspective view showing a refrigerator according to a third embodiment of the present invention.

5 is a perspective view showing the structure of a door for a home bar according to a third embodiment of the present invention;

6 is a view showing a fixture according to a third embodiment of the present invention.

7 is a view showing a door for a home bar of a refrigerator according to a fourth embodiment of the present invention.

8 is a view showing a home bar door of a refrigerator according to a fifth embodiment of the present invention.

9 is a view showing the door for the home bar of the refrigerator according to the sixth embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10, 20: power train 12: shaft

14: power generating portion 16: friction hinge

18: motor 21: gear module

22: first hinge cam 24: second hinge cam

26: input shaft 28: output shaft

30: refrigerator 32: refrigerator door

34: home bar door 36: opening

38: hinge axis 40: permanent magnet

42: electromagnet 44: fixture

The present invention relates to a power transmission device and a refrigerator using the same.

The refrigerator is divided into a freezer compartment and a refrigerating compartment, and is an electronic product that stores cold food at a low temperature by supplying cold air at a low temperature. Recently, a large refrigerator capable of storing a large amount of food for the convenience of life is produced. There is a large refrigerator such that a freezer compartment and a refrigerating compartment are generally arranged side by side in parallel to have a double door refrigerator structure.

In addition to the basic refrigerating and freezing functions, the refrigerator is introduced with a number of additional functions, which are installed at the front of the door of the refrigerator to prevent the outflow of cold air and the inflow of external air due to frequent opening and closing of the refrigerator door. It is a home bar that minimizes cold air and allows a user to take out a drink, wine, beer, etc., or even a simple bar function to put a cup or the like on.

The door for the home bar according to the prior art is opened and closed manually like a conventional refrigerator despite frequent use, and when the door for the home bar is not completely closed due to user's carelessness or mischief of children, the cool air leaks to the outside and consumes power. There is a problem that the increase and the internal food is deteriorated due to the long-term operation of the refrigerator.

In addition, the structure of the door for the home bar according to the prior art is a link type, it is easy to generate a failure or noise when opening and closing, there was an inconvenience for the elderly and people with disabilities to use.

The present invention provides a power transmission device capable of automatically opening and closing the door as well as the manual opening and closing of the door, and a refrigerator using the same.

According to an aspect of the present invention, there is provided a power transmission device including a shaft, a power generating portion for providing a driving force to the shaft and a friction hinge interposed between the shaft and the power generating portion, intermittent rotation of the shaft.

The power generation unit may include a motor and a gear module for reducing the rotation of the motor at a predetermined ratio.

The gear module may include an input shaft through which the rotation of the motor is input and an output shaft through which the rotation is reduced, and the input shaft and the output shaft may extend in the same direction.

The friction hinge may include a first hinge cam that receives rotation from the power transmission unit and a second hinge cam that frictionally contacts the first hinge cam and transmits the rotation to the shaft.

The friction force between the first hinge cam and the second hinge cam may be adjustable.

The maximum stop friction torque between the first hinge cam and the second hinge cam can be larger than the required torque for driving the shaft. Further, the maximum stop friction torque between the first hinge cam and the second hinge cam can be made smaller than the holding torque of the power transmission device.

The surface of the first hinge cam facing the second hinge cam may be formed such that the hill portion and the valley portion are alternately formed, and the surface of the first hinge cam facing the first hinge cam corresponds to the hill portion and the valley portion. The bone portion and the ridge portion can be formed alternately. In this case, the ridge and the valley may have a phase difference of 90 degrees.

In addition, according to another aspect of the present invention, a refrigerator door having an opening and a power transmission device which is hinged around the hinge shaft to the opening and coupled to the home bar door and the hinge shaft to open and close the opening, thereby controlling the rotation of the hinge shaft. Including, but the power transmission device is provided between the shaft coupled to the hinge shaft, the power generating portion for providing a driving force to the shaft and the friction hinge which is interposed between the shaft and the power generating portion, intermittent rotation of the shaft is provided. .

The power train may be accommodated in the door for the home bar.

The refrigerator according to the present invention may further include a permanent magnet installed on a portion of the door for the home bar contacting the edge of the opening or the edge and an electromagnet for canceling the magnetic force of the permanent magnet. The electromagnet may include a coil wound around the permanent magnet.

The power generation unit may include a motor and a gear module for reducing the rotation of the motor at a predetermined ratio.

The gear module may include an input shaft through which the rotation of the motor is input and an output shaft through which the rotation is reduced, and the input shaft and the output shaft may extend in the same direction.

The friction hinge may include a first hinge cam that receives rotation from the power transmission unit and a second hinge cam that frictionally contacts the first hinge cam and transmits the rotation to the shaft.

The friction force between the first hinge cam and the second hinge cam may be adjustable.

The maximum stop friction torque between the first hinge cam and the second hinge cam can be larger than the required torque for driving the shaft. Further, the maximum stop friction torque between the first hinge cam and the second hinge cam can be made smaller than the holding torque of the power transmission device.

The surface of the first hinge cam facing the second hinge cam may be formed such that the hill portion and the valley portion are alternately formed, and the surface of the first hinge cam facing the first hinge cam corresponds to the hill portion and the valley portion. The bone portion and the ridge portion can be formed alternately. In this case, the ridge and the valley may have a phase difference of 90 degrees.

In addition, according to another aspect of the present invention, the refrigerator door is formed in the opening, the hinge is coupled around the hinge axis to the opening, the door for the home bar to open and close the opening, and the portion of the door for the home bar in contact with the edge or the opening of the opening There is provided a refrigerator including an electromagnet for canceling the magnetic force of the permanent magnet so that the permanent magnet to be installed and the door for the home bar can be detached. In this case, the electromagnet may include a coil wound around the permanent magnet.

The refrigerator according to the present invention further includes a power transmission device coupled to the hinge shaft to adjust the rotation of the hinge shaft. The power transmission device includes a shaft coupled to the hinge shaft, a power generation unit for providing driving power to the shaft and the shaft and power. Interposed between the generators, it may include a friction hinge for intermittent rotation of the shaft.

Other aspects, features, and advantages other than those described above will become apparent from the following drawings, claims, and detailed description of the invention.

Hereinafter, a preferred embodiment of a power transmission device and a refrigerator using the same according to the present invention will be described in detail with reference to the accompanying drawings, in the description with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals. And duplicate description thereof will be omitted.

1 is a block diagram of a power transmission device according to a first embodiment of the present invention, Figure 2 is a perspective view showing a friction hinge according to a first embodiment of the present invention. 1 and 2, the power transmission device 10, the shaft 12, the power generation unit 14, the friction hinge 16, the motor 18, the gear module 21, and the first hinge cam ( 22, a second hinge cam 24, an input shaft 26, an output shaft 28, a ridge 23, and a valley 25 are shown.

The power transmission device 10 of the present embodiment is interposed between the shaft 12 and the power generation unit 14 for providing a driving force to the shaft 12 and between the shaft 12 and the power generation unit 14. It is possible to automatically rotate an external device (not shown) coupled with the shaft 12 by using the friction hinge 16 to control the rotation of the shaft 12 as a component, and generate power even if the external device is manually rotated. The occurrence of overload in the unit 14 can be prevented.

The power generating unit 14 may provide a rotational force to the shaft 12 may be used devices that are apparent to those skilled in the art. For example, the pulley and the belt may be used to provide the rotational force, or the motor may be used to provide the rotational force directly.

In addition, the rotation speed of the shaft 12 is reduced by using the motor 18 and the gear module 21 for decelerating the rotation of the motor 18 at a predetermined ratio as the power generating unit 14. To generate a large torque.

Hereinafter, a case in which the driving force is provided to the shaft 12 by using the motor 18 and the gear module 21 as the power generating unit 14 will be described.

The shaft 12 is a rod-shaped shaft coupled with an external device that requires rotation, and a worm gear module (not shown) may be coupled to decelerate the rotation output from the shaft 12 once more. In this case, it is also possible to form a worm on the outer circumferential surface of the shaft 12 to integrate it with the shaft 12.

The motor 18 has a high rotation speed such as about 3000 rpm. When the motor 18 is automatically opened and closed by providing a rotational force to a weight body such as a home bar door, the rotation speed does not need a rotation speed as large as several to several tens rpm. Torque is needed.

The gear module 21 may be provided to reduce the rotation speed of the motor 18 and to obtain a large torque. The gear module 21 serves to reduce the rotation of the motor 18 at a predetermined ratio. The gear module 21 has a plurality of gears arranged to reduce the rotation speed of the motor 18 by a combination of gears. do.

The gear module 21 has an input shaft 26 through which the rotation of the motor 18 is input and an output shaft 28 decelerating the rotation input from the input shaft 26 at a predetermined rate by the gear module 21 and outputting it. It may include. The input shaft 26 and the output shaft 28 may extend in opposite directions or may extend in the same direction. In the present embodiment, the input shaft 26 and the output shaft 28 extend in opposite directions so that the motor 18 and the gear module 21 are connected in a line. The case of extending in the same direction will be described in detail with reference to FIG. 3.

The friction hinge 16 is interposed between the shaft 12 and the power generating portion 14 to intermittently rotate the shaft 12. By intermittent rotation of the shaft 12 by the power generating unit 14 to automatically rotate the external device coupled to the shaft 12, or forcibly rotating the external device coupled to the shaft of the shaft 12 It is possible to prevent the rotational force from being transmitted to the power generator 14, thereby preventing the generation of the load of the power generator 14.

The friction hinge 16 is frictionally in contact with the first hinge cam 22 and the first hinge cam 22 that receives the rotation from the power generator 14, and the second hinge transfers the rotation to the shaft 12. It may include a cam 24. The friction force between the first hinge cam 22 and the second hinge cam 24 is adjustable. As such, the friction force between the first hinge cam 22 and the second hinge cam 24 may be adjusted to control whether the rotation generated from the power generator 14 is transmitted to the shaft 12. The first hinge cam 22 and the second hinge cam 24 through an elastic member (not shown) to control and maintain a constant friction force between the first hinge cam 22 and the second hinge cam 24. You can adjust the degree of adhesion.

The maximum stop friction torque between the first hinge cam 22 and the second hinge cam 24 is larger than the required torque for driving the shaft 12, and between the first hinge cam 22 and the second hinge cam 24. The maximum stop friction torque can be made smaller than the holding torque of the power train 10. Here, the maximum stop friction torque means the torque by the maximum stop friction force between the first hinge cam 22 and the second hinge cam 24, and the required torque for driving the shaft 12 is an external device coupled to the shaft 12. It means the torque required to rotate. In addition, the holding torque refers to the maximum torque generated against the external torque applied to the shaft 12 in a state where the power transmission device 10 is not operated. For example, when the power transmission device 10 includes the motor 18 and the gear module 21, the holding torque by the combination of a plurality of gears in the gear module 21, the cogging torque of the motor 18 itself, and It can be the sum of the holding torques due to the frictional force by the coupling of other devices.

Thus, the frictional force is adjusted so that the maximum stop friction torque between the first hinge cam 22 and the second hinge cam 24 is larger than the required torque of the shaft 12 and smaller than the holding torque of the power transmission device 10. As a result, the external device coupled to the shaft 12 may be automatically rotated by the driving of the power generator 14, and the external device coupled to the shaft 12 may be rotated while the power generator 14 is not operated. Even when rotating, slip occurs between the first hinge cam 22 and the second hinge cam 24 to prevent damage due to overload of the power generator 14.

On the other hand, as shown in Figure 2, on the surface of the first hinge cam 22 opposite to the second hinge cam 24, the ridge 23 and the bone 25 is formed alternately, the second A frictional force is formed on the opposite surface of the first hinge cam 22 of the hinge cam 24 by alternately forming the valleys 23 and the valleys 25 and the valleys 25 and 23 corresponding to the valleys 25. Can be adjusted. For example, the friction force may be adjusted by adjusting the height and depth of the ridge 23 and the valley 25, or elastically compressing the first hinge cam 22 and the second hinge cam 24 thereon. Friction force can be adjusted by placing an elastic member.

The hill 23 and the valley 25 may have a phase difference of 90 degrees as shown in FIG. 2. In the case where the external unit coupled to the shaft 12 is manually rotated by the 90 ° phase difference between the hill 23 and the valley 25, the hill 23 and the hill 23 of the first hinge cam 22 are rotated. 2 After the peaks of the ridge 23 of the hinge cam 24 abut each other, the ridge 23 may be automatically rotated while being engaged with the bone 25.

3 is a configuration diagram of a power transmission device according to a second embodiment of the present invention. Referring to FIG. 3, the power transmission device 20, the shaft 12, the friction hinge 16, the motor 18, the gear module 21, the first hinge cam 22, and the second hinge cam 24 are described. , Input shaft 26 and output shaft 28 are shown.

In this embodiment, the input shaft 26 and the output shaft 28 of the gear module 21, which are part of the power generator 14, are formed to extend in the same direction, thereby reducing the overall length of the power transmission device 20 of the present embodiment. The power transmission device 20 of the present embodiment can be applied according to the environment of the external device used.

The input shaft 26 and the output shaft 28 extend in the same direction so that the motor 18 and the friction hinge 16 connected to the output shaft 28 are connected in parallel to the input shaft 26 to provide rotation. To reduce the length of the power train 10.

Since other components are the same as the above-described embodiment, description thereof will be omitted.

4 is a perspective view showing a refrigerator according to a third embodiment of the present invention, Figure 5 is a perspective view showing the structure of a door for a home bar according to a third embodiment of the present invention. 6 is a view showing a fixture according to a third embodiment of the present invention. 4 to 6, the power train 10, the refrigerator 30, the refrigerator door 32, the door 34 for the home bar, the opening 36, the hinge shaft 38, and the permanent magnet 40. , Electromagnet 42, fixture 44 are shown.

In addition to the refrigerating and freezing functions, which are inherent to the refrigerator, various additional functions have been introduced, which are installed at the front of the door of the refrigerator to prevent waste of cold air due to frequent opening and closing of the refrigerating chamber doors and to prevent waste of cold air. Minimize, and the user can take out a drink, wine, beer, etc. Home bar (Home Bar) that can perform a simple bar function to put a cup or the like.

In the present embodiment, the refrigerator door 32 having the opening 36 formed therein is hinged around the hinge shaft 38 to the opening 36, and the door 34 for the home bar opening and closing the opening 36 is hinged. And a power transmission device 10 coupled to the shaft 38 to adjust the rotation of the hinge shaft 38, wherein the power transmission device 10 includes a shaft coupled to the hinge shaft 38 and a driving force to the shaft. Interposed between the power generating unit and the shaft and the power generating unit to automatically open and close the door 34 for the home bar formed on the front of the refrigerator 30, including a friction hinge for intermittent rotation of the shaft, Even when the user directly opens and closes the door 34, the home bar door 34 may be opened and closed manually by preventing damage due to an overload of the power transmission device 10 mounted on the home bar door 34.

As shown in FIG. 5, the opening 36 formed in the refrigerator door 32 has a home bar door 34 which is rotatably hinged about the hinge shaft 38, and is provided on the hinge shaft 38. The power transmission device 10 of the first embodiment described above is coupled to open or close the home bar door 34 automatically or manually.

The hinge shaft 38 is formed to protrude to the lower side of the home bar door 34 and is inserted into a groove formed at the lower inner side of the opening 36 to rotate the home bar door 34 about the hinge shaft 38. As a result, the opening 36 formed in the refrigerator door 32 can be opened or closed. That is, the power transmission device 10 is coupled to the hinge shaft 38 of the home bar door 34 to receive the driving force from the power transmission device 10 to automatically open and close the home bar door 34.

Since the power transmission device 10 is the same as the configuration of the above-described embodiment, a detailed description thereof will be omitted. As shown in FIG. 5, the power train 10 may be mounted inside the refrigerator door 32, and the power train 10 may be mounted inside the home bar door 34. .

The shaft of the power transmission device 10 is fixedly coupled with the hinge shaft 38 so that the hinge shaft 38 rotates due to the rotation of the shaft, and the door 34 for the home bar to which the hinge shaft 38 is coupled rotates. The opening 36 of the door 32 is opened and closed. In this case, the shaft and the hinge shaft 38 may be integrally formed, or the shaft of the power transmission device 10 may be used as the hinge shaft 38.

The friction hinge is the same as that of the above-described first embodiment. When the home bar door 34 is opened in the closed state, the door 34 may be opened at an angle of about 90 degrees with respect to the front surface of the refrigerator door 32. In this case, when the ridge and the valley formed on the first hinge cam or the second hinge cam of the friction hinge are formed to have a phase difference of 90 degrees, the home bar door 34 is opened or closed by the user. After the shaft rotates and the second hinge cam coupled to the shaft rotates, the peak portion of the second hinge cam and the peak portion of the first hinge cam come into contact with the valley portion, and then the shaft is automatically engaged. As a result, the door 34 for the home bar can be opened or closed.

On the other hand, the fastener 44 consisting of a permanent magnet 40 installed on the edge of the opening 36 or a part of the home bar door 34 in contact with the border and the electromagnet 42 to cancel the magnetic force of the permanent magnet 40 ), A magnetic material (not shown) is placed on a part of the home bar door 34 facing the permanent magnet 40 or the opening 36 (the edge of the opening 36 and the home bar door 34 are It may be made of a magnetic material.) When the home bar door 34 is closed, the home bar door 34 is attached to the opening 36 by the permanent magnet 40, and the outside of the cold air inside the refrigerator 30 is discharged. In order to prevent the inflow of outside air and the home bar door 34 to automatically open, the electric force is applied to the electromagnet 42 so as to cancel the magnetic force of the permanent magnet 40 by the attraction of the permanent magnet 40. The attachment state is released, and the power transmission device 10 is driven to open and close the door 34 for the home bar. Can be. That is, normally, the home bar door 34 is attached by the magnetic force of the permanent magnet 40 in a state in which the opening 36 is closed, and the permanent magnet only when the home bar door 34 is automatically opened. A current can be applied to cancel the magnetic force of 40) to minimize power consumption.

In the present embodiment, the permanent magnet 40 and the electromagnet 42 are installed at the portion where the home bar door 34 is in contact with the edge of the opening 36, but the permanent magnet 40 and the electromagnet 42 are provided with the opening 36. It is also possible to install on the border of the.

The fixture 44 has an electromagnet with coils wound along the outer circumferential surface of the permanent magnet 40 so as to cancel the magnetic force of the permanent magnet 40 as shown in FIG. 6, as opposed to the magnetism of the permanent magnet 40 in the coil. Applying a current to have a pole can cancel the magnetic force of the permanent magnet 40. In this case, it is also possible to offset only part of the magnetic force of the permanent magnet 40 and to open the home bar door 34 by the rotational force of the power transmission device 10.

Other components are the same as the first embodiment or the second embodiment described above, so description thereof will be omitted.

7 is a view showing a door for the home bar of the refrigerator according to a fourth embodiment of the present invention, Figure 8 is a view showing a door for the home bar of the refrigerator according to a fifth embodiment of the present invention, Figure 9 is a view of the present invention 6 is a view illustrating a door for a home bar of a refrigerator according to a sixth embodiment. 7 to 9, the door 34 for the home bar, the power transmission devices 10 and 20, the friction hinge 16, the gear module 21, and the motor 18 are illustrated.

The power transmission devices 10 and 20 coupled to the home bar door 34 may have various shapes depending on the size of the power generated in the power transmission device 10 or the position of the opening 36 formed in the refrigerator door 32. Can be combined.

As shown in FIG. 7, the power transmission device 10, in which the friction hinge 16, the motor 18, and the gear module 21 are arranged in a row, is coupled to the outside of the home bar door 34 and is in the refrigerator door. Although mounted, a pair of power transmission devices 10 may be coupled to both sides of the home bar door 34 so that driving force may be provided at both sides.

In addition, as shown in FIG. 8, when the home bar door 34 is formed at the side of the refrigerator door and there is insufficient space to install the power transmission device in which the friction hinge, the motor and the gear module are arranged in a line, the gear module 21 is provided. The input shaft 26 and the output shaft 28 in the same direction are coupled to the power transmission device 20 in which the motor 18 and the friction hinge 16 are parallel to one side of the home bar door 34 and in the refrigerator door. It can be mounted to open and close the door 34 for the home bar. In this case, the power transmission device 20 may be coupled to both sides of the home bar door 34, and the power transmission device 20 may be mounted inside the home bar door 34.

In addition, as shown in FIG. 9, the power transmission device 10 may be mounted in the door 34 for the home bar. In this case, the power transmission device 10 may be coupled to only one side of the home bar door 34, or the pair of power transmission devices 10 may be coupled to both sides of the home bar door 34.

Many embodiments other than the above-described embodiments are within the scope of the claims of the present invention.

According to a preferred embodiment of the present invention as described above, the opening and closing of the door for the home bar is possible to increase the convenience of the user, in particular, the elderly and disabled people can easily use the home bar of the refrigerator.

Claims (24)

delete delete delete delete delete delete delete delete delete A refrigerator door having an opening formed therein; A groove bar door hinged to the opening with a hinge axis at the center thereof to open and close the opening; And Is coupled to the hinge shaft includes a power transmission device for adjusting the rotation of the hinge shaft, The power transmission device, A shaft coupled to the hinge shaft; A power generator for providing a driving force to the shaft; And And a friction hinge interposed between the shaft and the power generating unit to control rotation of the shaft. The method of claim 10, And the power transmission device is accommodated in the door for the home bar. The method of claim 10, Permanent magnet is installed on the edge of the opening or a portion of the door for the home bar in contact with the border; And The refrigerator further comprises an electromagnet for canceling the magnetic force of the permanent magnet. The method of claim 12, The electromagnet, And a coil wound around the permanent magnet. The method of claim 10, The power generation unit, motor; And And a gear module configured to reduce rotation of the motor at a predetermined ratio. The method of claim 14, The gear module An input shaft to which the rotation of the motor is input; And It includes an output shaft outputted by decelerating the rotation, And the input shaft and the output shaft extend in the same direction. The method of claim 10, The friction hinge, A first hinge cam receiving rotation from the power transmission unit; And And a second hinge cam in frictional contact with the first hinge cam and transmitting rotation to the shaft. The method of claim 16, And a friction force between the first hinge cam and the second hinge cam is adjustable. The method of claim 17, And a maximum stop friction torque between the first hinge cam and the second hinge cam is greater than a required torque for driving the shaft. The method of claim 17, The maximum stop friction torque between the first hinge cam and the second hinge cam is smaller than the holding torque of the power train. The method of claim 17, On the surface of the first hinge cam that faces the second hinge cam, a ridge and a valley are alternately formed. And a valley portion and a hill portion corresponding to the hill portion and the valley portion are alternately formed on opposite surfaces of the first hinge cam of the second hinge cam. The method of claim 20, And said valley portion and said valley portion have a phase difference of 90 degrees. A refrigerator door having an opening formed therein; A home bar door hinged to the opening with a hinge axis at the center thereof to open and close the opening; Permanent magnet is installed on the edge of the opening or a portion of the door for the home bar in contact with the border; And It includes an electromagnet to offset the magnetic force of the permanent magnet so that the detachable door for the home bar, The electromagnet is a refrigerator, characterized in that it comprises a coil wound on the permanent magnet. delete The method of claim 22, Is coupled to the hinge shaft further comprises a power transmission device for adjusting the rotation of the hinge shaft, The power transmission device, A shaft coupled to the hinge shaft; A power generator for providing a driving force to the shaft; And And a friction hinge interposed between the shaft and the power generating unit to control rotation of the shaft.

Images