KR100388671B1 - Door switching device for refrigerator - Google Patents

Abstract

The present invention relates to a refrigerator door opening and closing device for supporting the opening and closing rotation of the door for rotating and opening the door opening of the cooling chamber formed in the refrigerator body, which is coupled to the door, the rolling roller is formed and the rotation axis of the door A contact bracket having a sliding contact portion spaced apart from each other; The sliding contact portion is elastically pressurized in the opening direction or the closing direction so that the door rotates in the opening direction or the closing direction at a position having a predetermined opening angle, and the support bracket is coupled to the main body, and the support bracket is pivotable. At least one pressing spring interposed between the pressing plate and the support bracket and the pressing plate to elastically press the upper region of the pressing plate to the contact bracket side, and the upper region of the pressing plate. It is coupled, characterized in that it comprises the door action member having a guide action member is formed on the plate surface and the camp profile is in contact with the rolling roller. Thus, the door can be opened and closed automatically from a predetermined opening angle, there is provided a door opening and closing device for a refrigerator that can improve the sealing force of the door.

Description

Door opening and closing device for refrigerators {DOOR SWITCHING DEVICE FOR REFRIGERATOR}

The present invention relates to a door opening and closing device for a refrigerator.

As shown in FIG. 12, the kimchi refrigerator 1 of the refrigerator is rotatably coupled to a main body 10 having an upwardly opened cooling chamber 11 and an upper portion of the main body 10 so that the cooling chamber ( The door 20 which pivotally opens and closes the door opening of 11) is provided.

The main body 10 has a substantially rectangular cylindrical outer casing 13 forming an outer appearance, and an inner casing 15 accommodated in the outer casing 13 to form a cooling chamber 11. The space between the outer casing 13 and the inner casing 15 is filled with a heat insulating material such as foam urethane for maintaining heat insulation between food and air contained in the cooling chamber 11.

In addition, the door 20 includes an upper door plate 21 and a lower door plate 23 coupled to the lower portion of the upper door plate 21, and in front of the upper door plate 21. A handle (not shown) gripped by the gripper is formed, and a gasket 28 is provided at the peripheral edge of the lower door plate 23 to contact the peripheral edge of the door opening to maintain the airtightness of the cooling chamber 11. The space between the upper door plate 21 and the lower door plate 23 is filled with a heat insulating material similarly to the main body 10.

On the other hand, the door opening and closing device 205 for supporting the opening and closing rotation of the door 20 is provided in the upper back region of the main body 10. The door opening and closing device 205 includes a support bracket 230 coupled to the main body 10, a rotation bracket 240 coupled to the rear end of the door 20 to rotate with respect to the support bracket, and the door 20. It has a door action member 250 for elastically rotating the rotation bracket 240 at a predetermined opening angle of.

The support bracket 230 has a U-shaped cross-sectional shape having a coupling part 231 coupled to the main body 10 and both sidewalls extending rearward from both ends of the coupling part 231. A pivot shaft 235 is formed in the upper end region of the support bracket 230 to form a pivot axis of the door 20, and the upper both side walls of the support bracket 230 are moved toward the main body 10 with respect to the pivot axis. The guide hole 237 on the curved partial arc is formed. The support plate 238 supporting the door action member 250 is coupled to the lower region of the support bracket 230.

Similar to the support bracket 230, the rotation bracket 240 has a U-shaped cross-sectional shape, and free end regions of both sidewalls are rotatably coupled to the rotation shaft 235. The sidewalls of the lower region of the rotation shaft 235 are coupled to the rotation conversion shaft 241 spaced in parallel with the rotation shaft 235. Both ends of the rotation conversion shaft 241 are accommodated in the guide hole 237 of the support bracket, and rotate along the guide hole 237 when the door 20 rotates.

The door action member 250 includes a first action plate 251 having a lower end coupled to the support plate 238 of the support bracket 230, and an upper end coupled to the rotation conversion shaft 241 of the rotation bracket 240. The two-acting plate 253 and the action spring 255 for moving the first actuating plate 251 up and down relative to the second actuating plate 253 when the door 20 is opened and closed are provided.

A guide groove 257 having a long hole is formed in an upper region of the first operation plate 251, and a guide groove 257 of the first operation plate 251 is formed in a lower region of the second operation plate 253. The actuating protrusion 258 is accommodated so that the vertical movement is possible. In addition, a spring stop 259 is formed at an upper portion of the action protrusion 258 of the second action plate 253, and the action spring 255 is formed between the support plate 238 and the spring stop 259. It is coupled to surround the second working plate (251, 253).

By this structure, in the state in which the door 20 is closed, the rotation conversion shaft 241 is located in the "A" part of the guide hole 237 like FIG. At this time, the action spring 255 presses the rotation conversion shaft 241 in the "a" direction in the compressed state to have an expansion force to maintain the closed state of the door 20.

And, when the user opens the door 20, when the rotation conversion shaft 241 is located in the "B" portion of the guide hole 237 as shown in Figure 15, the expansion force of the action spring 255 is the rotation conversion shaft ( 241 is pressed in the "b" direction. Then, as the second operation plate 253 moves up relative to the first operation plate 251, the rotation conversion shaft 241 is moved to the "C" portion of the guide hole 237 as shown in FIG. Let's do it. As a result, the door 20 is naturally opened by the expansion force of the working spring 255 from the opening angle at which the rotation conversion shaft 241 is located at the “B” portion of the guide hole 237 as shown in FIG. 15. That is, since the door action member 250 to which the rotation conversion shaft 241 is coupled rotates with respect to the rotation bracket 240, the door 20 to which the door action member 250 is coupled is naturally open and rotated. As shown in FIG. 16, the door 20 may maintain the open state by pressing the rotation conversion shaft 241 outward while the spring expansion force is applied in the “c” direction.

On the other hand, when the door 20 is closed, the user rotates the door 20 until the rotation conversion shaft 241 is located at the "B" portion of the guide hole 237, as shown in FIG. Then, from the time when the rotation conversion shaft 241 passes the "B" portion of the guide hole 237, the expansion force of the spring is applied in the "b" direction, as shown in Figure 14, the guide conversion hole 237 as shown in FIG. The door 20 is naturally rotated by moving to the " A "

By the way, in the conventional Kimchi refrigerator door opening and closing device, since the expansion force of the spring is applied to the main body upper region in the directions of "a", "b", and "c" as shown in Figs. 14 to 16, the door is closed. When in position, the spring's squeeze force is not transmitted to the door. Accordingly, when the support bracket member and the rotation bracket member are coupled, the door opening and closing device does not solve the problem when the gasket coupled to the lower part of the door does not come into close contact with the main body, depending on the coupling conditions such as dimensional tolerances.

Accordingly, it is an object of the present invention to provide a door opening and closing device for a refrigerator, in which the door can be opened and closed automatically from a predetermined opening angle, and the sealing force of the door can be improved.

1 is a rear perspective view of a kimchi refrigerator having a door opening and closing device according to the present invention;

Figure 2 is a perspective view of the door opening and closing device of Figure 1,

3 is an exploded perspective view of FIG. 2;

4 to 6 are side cross-sectional views of the door operating state according to line IV-IV of FIG.

Figure 7 is a rear perspective view of the kimchi refrigerator with a door opening and closing device according to another embodiment of the present invention,

8 is a perspective view of the door opening and closing device of FIG.

9 to 11 are side cross-sectional views of the door operating state along the line VII-VII of FIG. 7,

12 is a side cross-sectional view of the door opening and closing device according to another embodiment according to the present invention;

13 is a side cross-sectional view of a kimchi refrigerator equipped with a conventional door opening and closing device,

14 to 16 are enlarged cross-sectional views of the door opening and closing device installation area of FIG. 13 and showing a door operation state.

* Explanation of symbols for the main parts of the drawings

5,105: door opening and closing device 10: main body

20: door 30: support bracket

40: contact bracket 41: sliding contact

45: rolling roller 50,150: door action member

51,151: pressure plate 53,153: guide plate

75,175: Camp Profile 77: Torsion Coil Spring

78: ridge 79: plane section

178: circular guide surface 179: flat guide

According to the present invention, in the refrigerator door opening and closing device for supporting the opening and closing rotation of the door for rotating opening and closing the door opening of the cooling chamber formed in the refrigerator body, coupled to the door, the rolling roller is formed and A contact bracket having a sliding contact portion spaced apart from the pivot axis of the door; The sliding contact portion is elastically pressurized in the opening direction or the closing direction so that the door is rotated in the opening direction or the closing direction at a position having a predetermined opening angle, and a support bracket coupled to the main body and pivotable to the support bracket. At least one pressing spring interposed between the pressing plate and the support bracket and the pressing plate to elastically press the upper region of the pressing plate to the contact bracket side, and the upper region of the pressing plate. Combined, it is achieved by the door opening and closing device for a refrigerator, characterized in that it comprises the door action member having a guide action member is formed in the camp profile in contact with the rolling roller and the rolling roller.

At this time, the sliding contact portion is formed by bending the extended end region of the contact bracket in an arc shape, the door action member has an L-shape extending horizontally extending from the main body to the rear and then having an elastic force, the camp The profile may be configured to be formed in the upward extension.

Alternatively, the contact bracket may extend so that one end region is spaced apart from the pivot axis, and the sliding contact portion may be rotatably coupled to the extended end region of the contact bracket.

In addition, the guide action member is at least interposed between the guide action plate rotatably coupled to the pressing action plate and the guide action plate and the pressing action plate to elastically press the guide action plate against the pressing action plate. Has one elastic body; It is more effective that the camp profile has a raised portion curved upward from the plate surface area of the guide operating plate toward the main body.

In this case, it is preferable that the elastic body is a torsion coil spring in which a winding section is wound on a rotational axis of the guide operating plate and both ends thereof contact the guide operating plate and the pressure operating plate, respectively.

On the other hand, the guide action member may be coupled to be fixed to the pressing action plate.

At this time, the camp profile may preferably have an arc guide surface recessed in an arc shape from one plate surface area of the guide action member.

In addition, it is more preferable that the camp profile has a planar guide portion above and below the arc guide surface.

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

1 is a rear perspective view of a kimchi refrigerator having a door opening and closing device according to the present invention, FIG. 2 is a perspective view of the door opening and closing device of FIG. 1, and FIG. 3 is an exploded perspective view of FIG. 2. As shown in these figures, the kimchi refrigerator provided with the door opening and closing device according to the present invention, the main body 10 is formed with the upwardly opened cooling chamber 11, and rotatably coupled to the upper portion of the main body (10) And the door 20 for rotating and opening the door opening of the cooling chamber 11 is provided.

The main body 10 has a substantially rectangular cylindrical outer casing 13 forming an outer appearance, and an inner casing 15 accommodated in the outer casing 13 to form a cooling chamber 11. The space between the outer casing 13 and the inner casing 15 is filled with a heat insulating material such as foam urethane for maintaining heat insulation between food and air contained in the cooling chamber 11.

The door 20 is composed of an upper door plate 21 and a lower door plate 23 coupled to the lower portion of the upper door plate 21, and is gripped by the user in front of the upper door plate 21. A handle (not shown) is formed, and a gasket 28 is provided at the peripheral edge of the lower door plate 23 to contact the peripheral edge of the door opening to maintain the airtightness of the cooling chamber 11. The space between the upper door plate 21 and the lower door plate 23 is filled with a heat insulating material similarly to the main body 10.

At the rear end of the door 20, a hinge coupling portion 25 is provided, which is coupled to the hinge bracket 17 fixed to the main body 10. The hinge coupler 25 is coupled to the hinge bracket 17 by a hinge shaft that forms the rotation axis of the door 20, so that the door 20 is rotatably coupled to the main body 10 so that the cooling chamber 11 Open and close the door opening.

On the other hand, the door opening and closing device 5 for supporting the opening and closing rotation of the door 20 is provided in the upper rear region of the main body 10.

The door opening and closing device 5 includes a contact bracket 40 coupled to the rear end of the door 20 and a door 10 coupled to the main body 10 so that the door 20 is automatically opened and closed from a predetermined opening angle. Actuation member 50 is included.

The contact bracket 40 has an almost C shape and is coupled to the rear end of the door 20 by bolts. At the free end of the contact bracket 40, a sliding contact portion 41 spaced in parallel with the hinge axis is provided. The sliding contact portion 41 is composed of a roller engaging portion 43 formed on both sides of the free end of the contact bracket 40, and a rolling roller 45 rotatably coupled to the roller engaging portion 43.

The door action member 50 is rotatable on the support bracket 30 coupled to the main body 10, the pressure actuation plate 51 rotatably coupled to the support bracket 30, and the pressure actuation plate 51. It is coupled between the guide operating plate 53 and the support roller 30 of the contact bracket 40 in contact with the rolling bracket 45, the support bracket 30 and the pressure operating plate 51 is interposed between the main body ( 10 has a working spring member 55 for pressing outward.

The support bracket 30 includes a coupling plate 31 coupled to be in contact with the main body 10, and a pair of rotation support units 33 extending from both sides of the upper end region of the coupling plate 31 toward the rear of the main body 10. Have A plurality of bolt coupling holes 35 are formed on the plate surface of the coupling plate 31 for bolting with the main body 10, and a rotation shaft hole 37 is formed in the free end region of each pivot support part 33. have.

On both sides of the central region of the pressing plate 51, a rotating coupling portion 61 which is coupled to the rotating support portion 33 of the support bracket 30 so as to be mutually rotatable extends toward the main body 10. On both sides of the upper end of the plate 51 is formed a guide operating plate 53, the support portion 63 extending in the same direction as the rotating coupling portion 61 to support the guide operating plate 53 to rotate. In addition, a pass hole 69 is formed on the plate surface of the pressure acting plate 51 through which the free end of the spring support shaft 81 of the acting spring member 55 to be described later passes.

A rotating shaft through hole 65 corresponding to the rotating shaft hole 37 of the rotating support part 33 is formed in the free end region of the rotating coupling part 61 of the pressing plate 51. The support bracket 30 and the pressure operating plate 51 are supported by the rotation shaft 67 coupled to pass through the rotation shaft hole 37 and the rotation shaft through hole 65. Combined so that relative rotation is possible.

The guide operating plate 53 has a shaft coupling portion 73 which is axially coupled to the guide operating plate 53, the support portion 63 of the pressing operation plate 51 on both lower sides, the upper surface and the sliding contact portion 41 It is formed by the camp profile 75 which contacts.

The camp profile 75 is a planar section formed on the upper and lower portions of the ridge 78 and the ridge 78 which are raised to be bent toward the main body 10 side from the substantially center area of the upper surface of the guide operating plate 53. Has (79) A torsion coil spring 77 is provided between the guiding actuating plate 53 and the pressurizing acting plate 51 as an elastic body that expands the guiding acting plate 53 from the pressurizing acting plate 51. Here, the elastic body may be provided with a coil spring or a leaf spring, rubber excellent in elastic force, and the like.

The guide actuation plate 53 is rotatably coupled to the shaft engaging portion 73 by the coupling shaft 71 to the guide actuation plate 53 support portion 63 of the pressing actuation plate 51. In addition, the torsion coil spring 77 has a guide operating plate 53 in a shape in which both ends thereof are in contact with the pressure operating plate 51 and the guide operating plate 53, and the winding section is wound around the coupling shaft 71. It is interposed between the press working plates 51.

The spring member 55 has a spring support shaft 81, one end of which is fixed to the coupling plate 31 of the support bracket 30, and a free end of which passes through a through hole of the pressure acting plate 51, and a spring support shaft. The pressing spring 83 which is interposed between the support bracket 30 and the pressurizing actuating plate 51 in the form of enclosing 81, and the free end of the spring support shaft 81 at the outer side of the pressurizing acting plate 51. It has a ring-shaped stopper 85 to be engaged. The stopper 85 prevents the pressing plate 51 from deviating from the spring support shaft 81 by the expansion force of the pressing spring 83.

With this configuration, in the door opening and closing device 5 according to the present invention, as shown in FIG. 4 in the state in which the door 20 is closed, the expansion force of the pressure spring 83 is lowered to the lower region of the pressure operating plate 51. Delivered. As a result, the pressurizing actuating plate 51 is caused to rotate at the lower end of the main body 10 and the upper end is to rotate toward the main body 10.

At this time, the rolling roller 45 of the contact bracket 40 is located in the planar section 79 of the upper region of the ridge 78 of the camp profile 75.

In this state, the expansion force of the pressure spring 83 and the torsion coil spring 77 is applied to the door 20 by being applied in the "D" direction through the upper region of the pressure operating plate 51 and the guide operating plate 53. The contact bracket 40 is delivered. As a result, the door 20 is in close contact with the main body 10 side around the hinge axis, thereby increasing the sealing force of the door 20.

On the other hand, when the user opens the door 20, the contact bracket 40 coupled to the rear end of the door 20 is rotated open around the hinge axis. At this time, the opening force of the door 20 acts in the "E" direction through the rolling roller 45. Then, as shown in FIG. 5, the upper portion of the pressing plate 51 rotates to the rear of the main body 10, and the lower portion of the pressing plate 51 rotates toward the main body 10. At this time, the pressing spring 83 is compressed. This action is achieved until the opening angle of the door 20 has a rolling angle at which the rolling roller 45 is located at the point “d” of the ridge 78 of the camp profile 75.

Then, when the rolling roller 45 of the contact bracket 40 passes the point “d” of the raised portion 78 of the camp profile 75, the pressure spring 83 is expanded and the lower end portion of the pressing plate 51 is expanded. Is rotated to the rear of the main body 10, and the upper end is rotated to face the main body 10. In addition, the guide operating plate 53 is rotated by the expansion force of the torsion coil spring 77, the lower portion to the main body 10 side, the upper portion is rotated to the rear of the main body 10.

Then, the expansion force of the pressure spring 83 and the torsion coil spring 77 is applied in the "D" direction through the upper region of the pressure operating plate 51 and the guide operating plate 53 is transmitted to the contact bracket 40. . As a result, the rolling roller 45 of the contact bracket 40 rotates downward along the lower region of the ridge 78 of the camp profile 75, and the door 20 is automatically opened.

On the other hand, when the door 20 that is open is closed, the rolling roller 45 of the contact bracket 40 rotates upward while rotating the upper portion of the pressing plate 51 to the rear of the main body 10 and pressurizing it. The lower part of the working plate 51 is rotated to the main body 10 side. Then, as soon as the rolling roller 45 passes the ridge d 78 point “d” of the camp profile 75 as shown in FIG. 5, the pressure spring 83 is expanded, and the lower end of the pressurizing actuating plate 51 is the main body ( It is rotated to the rear of 10), and the upper end is rotated to face the main body 10. In addition, the guide operating plate 53 is rotated by the expansion force of the torsion coil spring 77, the lower portion to the main body 10 side, the upper portion is rotated to the rear of the main body 10.

Then, the expansion force of the pressing spring 83 and the torsion coil spring 77 is applied in the "D" direction through the upper region of the pressing plate 51 and the guide plate 53 to the door through the contact bracket 40 Is passed to 20. As a result, the door 20 rotates toward the main body 10 with respect to the hinge axis to block the door opening of the cooling chamber 11.

Then, the expansion force of the pressing spring 83 is continuously applied in the "D" direction through the upper region of the pressing operating plate 51 and the guide operating plate 53, thereby maintaining the sealing force of the door 20.

On the other hand, Figure 7 is a rear perspective view of the kimchi refrigerator with a door opening and closing device according to another embodiment of the present invention, Figure 8 is a perspective view of the door opening and closing device of FIG. As shown in this figure, the door opening and closing device 105 of the present embodiment, like the door opening and closing device 5 of Figs. 1 to 6, the support bracket 30 is coupled to the main body 10 and the door ( 20 has a contact bracket 40 coupled to the rear end of the support bracket 20, and is coupled between the support bracket 30 and the contact bracket 40 so that the door 20 is automatically opened and closed from a predetermined opening angle. As the door acting member 150, the press acting plate 151 rotatably coupled to the support bracket 30, the guide acting member 153 coupled to the upper portion of the press acting plate 151, and the support bracket 30. ) And an acting spring member 55 interposed between the pressurizing acting plate 151.

Since the support bracket 30, the contact bracket 40 and the action spring member 55 of the door opening and closing device 105 according to the present embodiment are the same as the door opening and closing device 5 of FIGS. 1 to 6 described above, In the following only the door action member 150 will be described. In this case, the same components and the same reference numerals are used for the same components as the door opening and closing device 5 described above.

As shown in FIG. 8, the door actuating member 150 of the door opening and closing apparatus 105 according to the present embodiment is pressurized acting plate 151 rotatably coupled to the pivot support 33 of the support bracket 30. And a guide action member 153 having a camping profile 175 coupled to the upper side of the pressing plate 151 to contact the rolling roller 45 of the contact bracket 40.

On both sides of the central region of the pressing plate 151, the rotating coupling portion 161 which is coupled to the rotating support portion 33 of the support bracket 30 so as to be mutually rotatable extends toward the main body 10, the pressing action On both sides of the upper end of the plate 151 is formed a guide action member coupling portion 163 extending in the same direction as the rotation coupling portion 161 and coupled to the guide action member 153. In addition, a passage hole 169 through which the free end of the spring support shaft 81 of the acting spring member 55 passes is formed on the plate surface of the pressurizing acting plate 151.

A rotating shaft through hole (not shown) corresponding to the rotating shaft hole 37 of the rotating support part 33 is formed in the free end portion of the rotating coupling part 161 of the pressing plate 151. The support bracket 30 and the pressure actuating plate 151 are supported by the actuating plate 151 by the pivot shaft 167 coupled to pass through the pivot shaft hole (not shown) and the pivot shaft through hole (not shown). It is coupled so that relative rotation is possible with respect to (30).

In the camp profile 175 of the guide action member 153, the upper and lower end regions of the side facing the main body 10 are formed of the flat guide portion 179, and the section between the two flat guide portions 179 is a part. It is formed of an arc guide surface 178 recessed in an arc shape. The guide action member 153 has a rear region coupled to the guide action member coupling portion 163 of the pressure action plate 151.

By such a configuration, in the door opening and closing device 105 according to the present embodiment, as shown in FIG. 9 in the state in which the door 20 is closed, the expansion force of the pressing spring 83 is lower in the lower region of the pressing plate 151. Is passed to. Thereby, the pressurizing acting plate 151 has an action of causing the lower end to rotate to the rear of the main body 10 and the upper end to rotate toward the main body 10. At this time, the rolling roller 45 of the contact bracket 40 is located in the upper planar guide portion 179 of the camp profile 175.

In this state, the expansion force of the pressure spring 83 is applied to the contact bracket 40 coupled to the door 20 by being applied in the "D" direction through the upper region of the pressure acting plate 151 and the guiding acting member 153. Delivered. As a result, the door 20 is in close contact with the main body 10 side around the hinge axis, thereby increasing the sealing force of the door 20.

On the other hand, when the user opens the door 20, the contact bracket 40 coupled to the rear end of the door 20 is rotated open around the hinge axis. At this time, the opening force of the door 20 acts in the "E" direction through the rolling roller 45. Then, as shown in FIG. 10, the upper portion of the pressing plate 151 rotates to the rear of the main body 10, and the lower portion of the pressing plate 151 rotates toward the main body 10. At this time, the pressing spring 83 is compressed. This action is performed until the opening angle of the door 20 has a rolling angle at which the rolling roller 45 is located at the point “h” of the arc guide surface 178 of the camp profile 175.

Then, at the moment when the rolling roller 45 of the contact bracket 40 passes the point “h” of the arc guide surface 178 of the camp profile 175, the pressure spring 83 is expanded and the lower end of the pressure acting plate 151. Is rotated to the rear of the main body 10, and the upper end is rotated to face the main body 10.

Then, the expansion force of the pressing spring 83 is applied in the "D" direction through the upper region of the pressing plate 151 and the guide member 153 is transmitted to the contact bracket 40. As a result, the rolling roller 45 of the contact bracket 40 rotates downward along the arc guide surface 178 of the camp profile 175, and the door 20 is automatically opened.

Then, when the rolling roller 45 is located in the lower plane guide 179 past the "i" position of the camp profile 175, the rolling roller 45 is also affected by the pressing force of the pressing spring 83 applied in the "D" direction. As in 11, the open state of the door 20 is maintained.

On the other hand, when the door 20 that is open is closed, the rolling roller 45 of the contact bracket 40 rotates upward while rotating the upper portion of the pressing plate 151 to the rear of the main body 10 to pressurize it. The lower portion of the working plate 151 is rotated to the main body 10 side. Then, as the rolling roller 45 passes the “h” point of the camp profile 175 as shown in FIG. 11, the pressure spring 83 expands and the lower end of the pressing plate 151 moves toward the rear of the main body 10. It is rotated and rotated so that the upper end may face the main body 10.

Then, the expansion force of the pressing spring 83 is applied in the "D" direction through the upper region of the pressing plate 151 and the guide member 153 is transmitted to the door 20 through the contact bracket 40. As a result, the door 20 rotates toward the main body 10 side as shown in FIG. 10 around the hinge axis, and blocks the door opening of the cooling chamber 11 as shown in FIG. 9.

Then, the expansion force of the pressing spring 83 is continuously applied in the "D" direction through the upper region of the pressing plate 151 and the guide plate 53, thereby maintaining the sealing force of the door 20.

As described above, in the door opening and closing apparatus for a refrigerator according to the present invention, the sliding contact portion of the contact bracket rotates while contacting the camp profile formed on the door action member when the door is opened and closed, and the door action member predetermined sliding contact portion of the contact bracket. By elastically pressing in the opening direction or the closing direction at the door opening angle of the door, the door can be opened and closed automatically from a predetermined opening angle. Thereby, opening / closing rotation of a door can be made easy. Further, in the closed state of the door, the door action member elastically presses the door in the closing direction, thereby improving the sealing force of the door.

In the above-described embodiments, the rolling roller is provided as a sliding contact portion in the contact bracket coupled to the door, and the support bracket, the pressure acting plate and the guide acting plate, the pressure spring, and the like are provided as the door acting member coupled to the main body. According to the present invention, as shown in Figure 12, while processing the extended end portion of the contact bracket 240 coupled to the door in an arc shape to form a sliding contact portion 241, while the door action member 250 coupled to the main body By processing the metal member in an L shape so as to have elastic force and forming the camp profile 275 in contact with the sliding contact portion 241 in the upper region, the structure of the door opening and closing device may be simply configured.

As described above, according to the present invention, there is provided a door opening and closing device for a refrigerator that can open and close and rotate automatically from a predetermined opening angle, and improve the sealing force of the door.

Claims (10)

In the refrigerator door opening and closing device for supporting the opening and closing rotation of the door for rotating opening and closing the door opening of the cooling chamber formed in the refrigerator body, A contact bracket coupled to the door and having a rolling roller and having a sliding contact portion spaced apart from the rotation axis of the door; The sliding contact portion is elastically pressurized in the opening direction or the closing direction so that the door is rotated in the opening direction or the closing direction at a position having a predetermined opening angle, and a support bracket coupled to the main body and pivotable to the support bracket. At least one pressing spring interposed between the supporting plate and the supporting bracket and the pressing plate to elastically press the upper region of the pressing plate to the contact bracket side, and an upper region of the pressing plate. It is coupled to, the door opening and closing device for a refrigerator comprising a door action member having a guide action member is formed on the surface of the camp roller in contact with the rolling roller. delete The method of claim 1, The sliding contact portion is formed by bending an extended end region of the contact bracket in an arc shape, and the door action member has an L shape extending horizontally from the main body to the rear and extending upward to have an elastic force, and the camp profile The door opening and closing device for a refrigerator, characterized in that formed in the upward extension. The method of claim 1, The contact bracket extends so that one end region is spaced apart from the pivot axis, and the sliding contact portion is rotatably coupled to the extended end region of the contact bracket. delete The method of claim 1, The guide action member may include at least one guide action plate rotatably coupled to the pressure action plate, and interposed between the guide action plate and the pressure action plate to elastically press the guide action plate with respect to the pressure action plate. Has an elastic body; The camp profile is a door opening and closing device for a refrigerator, characterized in that it has a ridge raised to be curved toward the main body from one surface area of the guide operation plate. The method of claim 6, And said elastic body is a torsion coil spring in which a winding section is wound on a rotation axis of said guide operating plate and both ends thereof contact said guide operating plate and said pressure operating plate, respectively. The method of claim 5, The guide action member is a refrigerator door opening and closing device, characterized in that coupled to be fixed to the pressing action plate. The method of claim 8, The camp profile door opening and closing device for a refrigerator, characterized in that it has an arc guide surface recessed in an arc shape from one plate surface area of the guide action member. The method of claim 9, The camp profile door opening and closing device for a refrigerator, characterized in that the flat guide portion on the upper and lower portion of the arc guide surface.