KR101036308B1 - Hinge-assembly for chest type refrigerator - Google Patents

Abstract

The present invention relates to a hinge assembly of a chest type refrigerator. According to the present invention, an inner space 24 is formed to be opened to at least one end thereof, and a housing 22 which the side cap 34 shields the opened internal space 24 and the side cap 34 penetrate the housing. A shaft 40 which is provided over the inside and outside of the 22 and rotates relative to the housing 22, rotates together with the shaft 40, and one surface is in close contact with the inner surface of the side cap 34. The cam surface 45 is provided with a rotating cam 44, and the cam surface 52 which is in contact with the cam surface 45 of the rotary cam 44 is interlocked with the spring 60 in the housing 22 The cam surface 52 is installed to be in close contact with the cam surface 45 of the rotary cam 44 by the linear cam in the housing 22, and the rotary cam 44 is provided in the It is configured to include a dispersion protrusion 48 in close contact with the inner surface of the side cap (34). Hinge assembly according to the present invention having such a configuration has the advantage that the durability is relatively high and the manufacturing cost is low.

Refrigerator, Chest Type, Door, Hinge, Force, Dissipation

Description

Hinge assembly of chest type refrigerator {Hinge-assembly for chest type refrigerator}

1 is an exploded perspective view showing the configuration of a hinge assembly of a refrigerator according to the prior art.

Figure 2 is a rear perspective view showing the configuration of a refrigerator employing a preferred embodiment of the hinge assembly according to the present invention.

Figure 3 is a partially exploded perspective view showing the configuration of the embodiment of the present invention.

Figure 4 is a cross-sectional exploded perspective view showing the main portion of the embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

20: hinge assembly 22: housing

24: internal space 26: stopper

30: mounting bracket 32: screw hole

34: side cap 35: through hole

36: screw hole 37: bush

40: shaft 44: rotating cam

45: cam surface 46: support surface

48: dispersion protrusion 50: sliding cam

52: cam surface 54: guide rib                 

60: spring

The present invention relates to a refrigerator, and more particularly, to a hinge assembly of a chest type refrigerator serving as an opening and closing center of a door for opening and closing a storage space of the refrigerator.

The refrigerator keeps the storage fresh for a long time by maintaining the storage space inside the set temperature. There are various types of such refrigerators, and the present invention relates to a chest-type refrigerator in which a door is formed on an upper surface of the refrigerator body.

In chest type refrigerators, the door is configured to open in the opposite direction of gravity. Thus, when the door is closed, a hinge assembly as shown in FIG. 1 is used to prevent the door from closing rapidly due to its own weight.

According to the figure, the housing 1 forms the external appearance of the hinge assembly. The housing 1 is formed to have a substantially cylindrical shape, and a predetermined space is formed therein. One side of the housing 1 is integrally formed with a mounting bracket (3) mounted to the refrigerator body. The mounting bracket 3 is drilled with mounting holes 3 'through which screws pass.

The end of the housing 1 is provided with a side cap 5 for shielding the space therein. The side cap 5 also serves to ensure that the components constituting the hinge assembly are installed in place within the housing 1. The side cap 5 is fastened to the housing 1 with screws.

The shaft 7 is installed to protrude outward through the side cap 5 in the housing 1. The shaft 7 becomes the center of rotation of the door. A portion of the shaft 7 which protrudes out of the housing 1 through the side cap 5 forms a connection bracket 9 connected to the door. Thus, the housing 1 is fixed to the refrigerator body, the shaft 7 is fixed to the door by the connecting bracket 9, the shaft 7 is rotated relative to the housing (1).

A cam portion 8 is formed in the shaft 7. The cam portion 8 is in contact with a sliding cam (not shown) pushed toward the side cap 5 by a spring (not shown) in the housing 1 so that the sliding cam elastically deforms the spring. do. As such, the cam unit 8 and the sliding cam interlock with each other by the rotation of the shaft 7, thereby providing a force that prevents the rotation of the shaft 7, that is, a damping force on the door.

However, the hinge assembly according to the prior art as described above has the following problems.

That is, the elastic force of the spring is transmitted to the side cap (5) through the cam portion 8 of the sliding cam and the shaft (7). However, the area where the cam portion 8 is in contact with the side cap 5 to transmit the elastic force of the spring is formed to be relatively narrow, so that the crack on the side cap 5, as shown in Figure 1, There is a problem that occurs and eventually breaks. In particular, when the refrigerator is a large capacity, since the weight of the door is relatively heavy, the elasticity of the spring is increased, and the problem of breakage of the side cap 5 is increasing.

In order to solve this problem, the side cap 5 should be made of a material having higher strength. However, there is a problem in that the cost for manufacturing the side cap (5).

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to efficiently distribute and transmit the elastic force of the spring generating the damping force in the hinge assembly to other parts.

Another object of the present invention is to make it easier to design the strength of the side cap constituting the hinge assembly.

According to a feature of the present invention for achieving the object as described above, the present invention is a housing for forming an inner space to be opened to at least one end and the side cap shielding the opened inner space, and through the side cap A shaft provided over the inside and outside of the housing and being rotated relative to the housing, a rotating cam rotating together with the shaft, one surface being in close contact with the inner surface of the side cap, and a cam surface being formed on the other surface, and the cam surface of the rotating cam. A sliding cam having a cam surface interlocked with and in contact with the cam surface, the cam surface being installed to be in close contact with the cam surface of the rotating cam by a spring in the housing, and the linear cam moving linearly in the housing; It comprises a dispersion protrusion in close contact with the inner surface.

The rotary cam is formed integrally around the outer circumferential surface of the shaft, and one surface of the side cap and one surface of the distribution protrusion are in contact with each other to transmit and distribute the elastic force provided by the spring to the side cap.

The dispersion protrusions are formed around the outer circumferential surface of the rotary cam at a predetermined angle interval.

The shaft, the rotary cam, the sliding cam and the spring are provided symmetrically on both ends of the interior of the housing.

A portion of the shaft penetrating the side cap and protruding out of the housing is fastened to one side of the refrigerator body or the door by a fastening bracket, and the mounting bracket of the housing is the door or the refrigerator body opposite to the fastening bracket. Is fastened to.

The position where the dispersion protrusion is in close contact with the side cap by the elastic force of the spring is at or near the portion where the side cap is fastened to the housing.

Hinge assembly according to the present invention having such a configuration has the advantage that the durability is relatively high and the manufacturing cost is low.

Hereinafter, a preferred embodiment of a hinge assembly of a refrigerator according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a rear perspective view showing the configuration of the refrigerator employing the hinge assembly of the embodiment of the present invention, Figure 3 is a partial cutaway exploded perspective view of the configuration of the hinge assembly of the embodiment of the present invention, Figure 4 is an embodiment of the present invention An example major configuration is shown in cross-sectional resolution view.

As shown in these figures, a storage space (not shown) is formed inside the refrigerator main body 10. The storage space is opened to the upper portion of the refrigerator body (10). The storage space is opened and closed by the door 12. The door 12 is installed in the refrigerator main body 10 so as to be opened and closed by the hinge assembly 20 to be described below. That is, the door 12 is opened and closed by the hinge assembly 20 connecting the upper end of the rear surface of the refrigerator body 10 and the rear end of the door 12.

The lower end of the refrigerator body 10 is provided with a machine room 14, the machine room 14 is shielded by a back cover (16). The back cover 16 shields the machine room 14 so that the inside thereof is not visible.

The hinge assembly 20 serves to pivotally connect the door 12 with respect to the refrigerator body 10. The configuration of the hinge assembly 20 is shown well in FIGS. 3 and 4. The housing 22 constitutes the external appearance of the hinge assembly 20. The housing 22 is made by injection molding a synthetic resin. The housing 22 is elongated in a hollow cylindrical shape.

An inner space 24 is formed inside the housing 22. The inner space 24 is formed to penetrate the housing 22 in the longitudinal direction. A stopper 26 is formed at the center of the inner space 24. The stopper 26 serves to support one end of the spring 60 to be described below. The stopper 26 is formed to have a diameter corresponding to the diameter of the spring 60 surrounding the inner surface of the inner space 24. A plurality of channels 28 are formed on the inner surface of the inner space 24 over a predetermined section in the longitudinal direction. The channel 28 is a portion to which the guide rib 54 of the sliding cam 50 to be described below is guided.

The mounting bracket 30 is integrally formed on the outer surface of the housing 22. The mounting bracket 30 is formed to protrude in the circumferential direction on the outer surface of the housing 22. The mounting bracket 30 protruding in the circumferential direction extends in the longitudinal direction of the housing 22. A plurality of screw holes 32 are formed in the mounting bracket 30. The screw hole 32 is a portion through which the screw for fastening the housing 22 to the refrigerator main body 10 passes.

Side caps 34 are installed at both ends of the housing 22 to shield the internal space 24. The side cap 34 is formed in a shape corresponding to the inlet of the inner space 24 to shield the inlet of the inner space 24. The through hole 35 is formed through the center of the side cap 34. The through hole 35 penetrates the shaft 40 to be described below. The side cap 34 has a plurality of screw holes 36 for screwing with the housing 22. The side cap 34 is made of a synthetic resin or a small alloy such as general ABS.

A bush 37 is provided at a portion of the through hole 35 where the shaft 40 and the side cap 34 are to be described below. The bush 37 allows the shaft 40 to rotate smoothly with respect to the side cap 34.

The shaft 40 is to be the center of rotation of the door 12 and rotates relative to the housing 22. Most of the shaft 40 is located along the central axis of the inner space 24 inside the inner space 24 of the housing 22. A portion of the shaft 40 extending through the side cap 34 to the outside of the housing 22 forms a fastening bracket 42. The fastening bracket 42 is a part fastened to the door 12. A fastening hole 43 for fastening to the door 12 is drilled in the fastening bracket 42.

A rotating cam 44 is formed at a portion of the shaft 40 located in the inner space 24 of the housing 22. The rotary cam 44 is formed integrally with the shaft 40. The rotary cam 44 is provided with a cam surface 45. The cam surface 45 is formed in a helical shape, and interlocked with the cam surface 52 of the sliding cam 50 to be described below to allow the sliding cam 50 to move in the longitudinal direction of the housing 22.

A support surface 46 is provided on the opposite side of the cam cam 45 formed of the rotary cam 44. The support surface 46 is a part of the inner surface of the side cap 34 in close contact with the edge of the through hole 35. The support surface 46 is in close contact with the inner surface and the edge of the through hole 35 of the side cap 34 in accordance with the rotation of the rotary cam 44 is rubbed.

Dispersion protrusion 48 is formed on the rotary cam 44. The dispersion protrusion 48 extends in the centrifugal direction from an end side at which the support surface 46 of the rotary cam 44 is formed. The dispersion protrusions 48 are formed at 180 ° intervals in this embodiment. Of course, the dispersion protrusions 48 may be formed at various intervals according to design conditions. For example, it may be formed at 120 ° or 90 ° intervals.

The dispersion protrusion 48 serves to disperse the force applied by the rotary cam 44 to the side cap 34. That is, the rotary cam 44 relatively widens the area in contact with the dispersion protrusion 48 so that the force applied by the rotary cam 44 to the side cap 34 is distributed and transmitted. The dispersion protrusion 48 may have any hexahedron shape formed along the outer circumferential surface of the rotary cam 44 in this embodiment, or any shape that can disperse the force by contacting the inner surface of the side cap 34. none.

On the other hand, the dispersion protrusion 48 is formed to be at or near the position corresponding to the screw hole 36 of the side cap 34, for example, in the state in which the door 12 is closed. In this case, the force applied to the side cap 34 by the dispersion protrusion 48 is transmitted to a relatively rigid portion, thereby preventing the side cap 34 from being damaged.

The sliding cam 50 is installed in the inner space 24 of the housing 22. The sliding cam 50 linearly reciprocates a predetermined section in the longitudinal direction of the housing 22 in the inner space 24. A through hole 51 is formed through the center of the sliding cam 50, and a part of the shaft 40 is rotatably penetrated through the through hole 51. A cam surface 52 is formed on one surface of the sliding cam 50, that is, the surface facing the rotary cam 44. The cam surface 52 is in contact with the cam surface 45 of the rotary cam 44 such that the sliding cam 50 is linearly moved by the rotation of the rotary cam 44.

The sliding cam 50 is formed with guide ribs 54 moving along the channel 28 on the outer circumferential surface thereof. The guide rib 54 serves to guide the sliding cam 50 to make a straight reciprocating motion.

A spring 60 is installed between the sliding cam 50 and the stopper 26. The spring 60 is a coil spring, by pushing the sliding cam 50 in the direction of the rotary cam 44, the cam surface 45 of the rotary cam 44 and the cam surface 52 of the sliding cam 50 is Make sure they are in close contact with each other. Of course, the opening and closing speed of the door 12 is controlled by the spring 60 exerts an elastic force such that the rotary cam 44 and the sliding cam 50 are in close contact with each other. That is, a damping force is provided to open and close the door 12, so that the door 12 does not close suddenly.

Hereinafter, the operation of the hinge assembly of the refrigerator according to the present invention having the configuration as described above will be described in detail.

In the hinge assembly 20 of the present invention, the mounting bracket 30 is fastened to the refrigerator main body 10 by screws, and the fastening bracket 42 is fastened to the door 12 by screws. It is connected to the refrigerator main body 10 so as to be openable. Of course, in a state where the fastening bracket 42 is fastened to the door 12, a separate member is padded so that the fastening bracket 42 can be firmly mounted to the door 12. A portion of the fastening bracket 42 fastened to the door 12 is preferably shielded by a separate cover so that the fastening bracket 42 is not visible from the outside.

The hinge assembly 20 installed as described above allows the door 12 to be rotated with respect to the refrigerator body 10 to open and close the storage space. That is, the shaft 40 connected to the door 12 side rotates relative to the housing 22 by the user opening and closing the door 12.

At this time, the rotary cam 44 formed integrally with the shaft 40 is rotated integrally with the shaft 40, the cam cam (45, 52) of the rotary cam 44 and the sliding cam 50 is In close contact with each other by the elastic force of the spring (60) acts a force in a direction that hinders the rotation of the shaft (40). This prevents the door 12 from being opened and closed abruptly.

That is, when the shaft 40 is rotated, the cam surface 45 is interlocked with the cam surface 52 of the sliding cam 50 while the rotary cam 44 is rotated together. At this time, the rotary cam 44 is rotated in the housing 22, the sliding cam 50 by the rotation of the rotary cam 44 is a linear movement in the housing 22. That is, the sliding cam 50 moves in the direction to elastically deform the spring 60.

Therefore, the door 12 is not closed by the elastic force of the spring 60, but is closed at a certain speed. In this embodiment, when the door 12 is closed, the sliding cam 50 is moved in the direction to elastically deform the spring (60). That is, the spring 60 is operated to be compressed.

For reference, the sliding cam 50 has the guide rib 54 is guided along the channel 28, the shaft 40 is provided through the through hole 51, the housing 22 Only linear movement is performed within.

On the other hand, in the present invention the elastic force acting on the spring 60 is transmitted to the side cap 34 through the sliding cam 50 and the rotary cam 44. At this time, the portion of the rotary cam 44 in contact with the side cap 34 has the dispersion protrusion 48 in addition to the support surface 46. Therefore, as the contact area between the side cap 34 and the rotary cam 44 becomes relatively wide, the elastic force of the spring 60 is distributed and transmitted to the side cap 34. Therefore, the pressure acting on the side cap 34 becomes relatively small.                     

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

For example, in the embodiment shown in the figure, the shaft 40 protrudes at both ends of the housing 22, but it is not necessary to do so and a hinge assembly may be designed so as to protrude only at one end. That is, in the illustrated embodiment, two shafts 40, a sliding cam 50, and two springs 60 are provided, respectively, but only one of them may be provided.

In this embodiment, the mounting bracket 30 of the housing 22 is mounted to the refrigerator main body 10 and the fastening bracket 42 of the shaft 40 is fastened to the door 12. It is also possible to configure on the contrary.

In the hinge assembly of the refrigerator according to the present invention as described in detail above, the following effects can be obtained.

First, the side caps provided at both ends of the housing to maintain the installation state of the components provided in the housing, the contact area of the side cap is relatively wider, while the area of contact with the rotating cam which transmits the elastic force of the spring provided inside the housing is relatively wider. The pressure on the site becomes relatively small. Therefore, the elasticity of the spring is transmitted to the side cap is distributed and the durability of the side cap is improved.

In addition, as the elastic force acting on the side cap is dispersed as described above, the strength design of the side cap is relatively easy. Therefore, there is also an effect that can lower the manufacturing cost of the side cap.

And, the dispersion protrusion of the rotary cam in the present invention is a portion of the side cap is relatively high strength close to the side cap by the elastic force of the spring. Therefore, the durability of the side cap is relatively increased, and the strength design of the side cap is facilitated.

Claims (6)

A housing having an inner space formed to open at least one end thereof and a side cap shielding the opened inner space; A shaft which penetrates the side cap and is disposed over the inside and the outside of the housing and rotates relative to the housing; A rotating cam rotating together with the shaft and having one surface adhered to the inner surface of the side cap and the other surface formed with a cam surface; A sliding cam having a cam surface in contact with the cam surface of the rotary cam and interlocked with the cam surface by a spring in the housing so as to be in close contact with the cam surface of the rotary cam and linearly moving inside the housing; The hinge assembly of the chest type refrigerator, characterized in that it comprises a dispersion protrusion which is provided on the rotary cam in close contact with the inner surface of the side cap. According to claim 1, wherein the rotary cam is formed integrally around the outer circumferential surface of the shaft, the inner surface of the side cap and one surface of the dispersion protrusion in contact with the elastic force provided by the spring to the side cap The hinge assembly of the chest type refrigerator characterized by being distributed and transmitted. The hinge assembly of the chest type refrigerator according to claim 1 or 2, wherein the plurality of dispersion protrusions are formed around the outer circumferential surface of the rotary cam at a predetermined angle interval. The hinge assembly of the chest type refrigerator according to claim 3, wherein the shaft, the rotary cam, the sliding cam, and the spring are symmetrically provided at both ends of the inside of the housing. According to claim 4, Wherein the shaft is projected to the outside of the housing through the side cap is fastened to any one of the refrigerator body or the door with a fastening bracket, the mounting bracket of the housing is fastened to the fastening bracket A hinge assembly of a chest type refrigerator, which is fastened to an opposite door or a refrigerator main body. The hinge assembly of the chest type refrigerator according to claim 5, wherein the position where the dispersing protrusion is in close contact with the side cap by an elastic force of a spring is at or near the side cap is fastened to the housing.

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