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CN-122003569-A - Refrigerator and household appliance comprising same

CN122003569ACN 122003569 ACN122003569 ACN 122003569ACN-122003569-A

Abstract

The home appliance according to an embodiment of the present invention may include a door, and a door opening and closing device provided to open and close the door. The door opening and closing device may include a motor, a first gear receiving power from the motor and including a hollow portion, a plurality of groove portions formed in a circumferential direction in an inner circumferential surface of the first gear, and groove walls provided between the plurality of groove portions, a second gear including a rotation shaft inserted into the hollow portion of the first gear, and an elastic body coupled to the rotation shaft, having elasticity in a radial direction of the rotation shaft, and configured such that a portion thereof is inserted into the groove portions of the first gear.

Inventors

  • Ren Changxun
  • XU HANWEI
  • GUO RONGSHUO
  • JIN HANQUAN
  • Pu Minxi
  • LIU ZHEN
  • Yin Ruhuan
  • Yin Xuanzhi

Assignees

  • 三星电子株式会社

Dates

Publication Date
20260508
Application Date
20240912
Priority Date
20231014

Claims (15)

  1. 1. A household appliance, comprising: Doors (30, 1414, 1750), and A door opening and closing apparatus (200) provided to open and close the door (30, 1414, 1750), wherein the door opening and closing apparatus (200) includes: A motor (220); A first gear (241) that receives power from the motor (220) and includes a hollow portion (2411), a plurality of groove portions (2412) formed on an inner peripheral surface in a circumferential direction, and groove walls (2413) provided between the plurality of groove portions (2412); A second gear (242) including a rotation shaft (243) inserted into the hollow portion (2411) of the first gear (241), and An elastic body (244) coupled to the rotation shaft (243), and having an elastic force in a radial direction of the rotation shaft (243), and configured such that a portion of the elastic body is inserted into the groove portion (2412) of the first gear (241).
  2. 2. The household appliance according to claim 1, wherein the door opening and closing device (200) is configured to transmit the power of the first gear (241) to the second gear (242) in a state in which the elastic body (244) is caught on the groove wall (2413) or is in contact with the groove wall (2413).
  3. 3. The household appliance according to claim 1 or 2, wherein the plurality of groove portions (2412) comprises a first groove portion (2412 a) and a second groove portion (2412 b), and Wherein the groove wall (2413) is located between the first groove portion (2412 a) and the second groove portion (2412 b).
  4. 4. A household appliance as claimed in claim 3, wherein the circumferential length of the first groove portion (2412 a) and the circumferential length of the second groove portion (2412 b) are substantially equal.
  5. 5. The household appliance of any one of claims 1 to 4, wherein the power transmission between the first gear (241) and the second gear (242) is configured to be released when the elastic body (244) moves along one groove portion (2412) among the plurality of groove portions (2412).
  6. 6. The household appliance according to any one of claims 1 to 5, wherein the door opening and closing device (200) comprises a door side gear unit (250), the door side gear unit (250) being configured to transmit power between the second gear (242) and the door (30, 1414, 1750).
  7. 7. The household appliance as claimed in any one of claims 1 to 6, wherein the diameter of the rotation shaft (243) is configured to be smaller than the diameter of the hollow portion (2411) of the first gear (241).
  8. 8. The household appliance of any one of claims 1 to 7, wherein the door (30, 1414, 1750) is open with the motor (220) driven such that the first gear (241) rotates in a first direction, and the door (30, 1414, 1750) is closed with the motor (220) driven such that the first gear (241) rotates in a second direction opposite the first direction.
  9. 9. The household appliance according to any one of claims 1 to 8, wherein the elastic body (244) comprises an upper elastic body (244) and a lower elastic body (244) disposed to be spaced apart in a vertical direction, and Wherein the groove portion (2412) includes an upper groove portion (2412) and a lower groove portion (2412) disposed to be spaced apart in a vertical direction.
  10. 10. The household appliance of any one of claims 1 to 9, wherein the elastomer (244) comprises: a body portion (2441); A spring (2443) accommodated in the main body portion (2441), and A head portion (2442) supported by one side of the spring (2443) and configured such that a portion thereof is accommodated within the body portion (2441).
  11. 11. The household appliance according to claim 10, wherein the head portion (2442) has a spherical shape.
  12. 12. The household appliance of any one of claims 1 to 11, wherein, when the first gear (241) is rotated in a first direction by the motor (220), the elastic body (244) is configured to pass through the groove wall (2413) and move along an adjacent other groove portion (2412) in case the second gear (242) is rotated in a second direction opposite to the first direction by an external force.
  13. 13. The household appliance of any one of claims 1 to 12, wherein the motor (220) is configured to move as it is with a predetermined input value even if a force acts in the opposite direction when driven to open or close the door (30, 1414, 1750).
  14. 14. The household appliance of any one of claims 1 to 13, wherein the elastomer (244) is a ball plunger.
  15. 15. The household appliance of any one of claims 1 to 14, wherein the household appliance is at least one of a refrigerator (1), a dishwasher (14) or a cooking device (17).

Description

Refrigerator and household appliance comprising same Technical Field Various embodiments of the present disclosure relate to an automatic door opening and closing structure of a refrigerator and a home appliance including the same. Background In general, a home appliance including a refrigerator, a dishwasher, or a cooking device such as an oven is provided with a door configured to be openable and closable to access an inner space. The door may include a manual opening and closing type door configured to be directly opened and closed by a user, and an automatic opening and closing type door configured to be automatically opened and closed using a door opening and closing device according to a user input. In automatically opening/closing a door, a user can move the door by directly applying a force at any time when the door is automatically opened or closed. In this case, a load may be generated on the motor of the door opening and closing apparatus due to an external force of a user, and thus damage may occur to the motor or performance of the motor may be lowered. As an example, a method may be proposed in which a current load (current load) applied to a motor is detected to determine whether a user has intervened, and the operation of the motor is stopped in the case of the user's intervention. For the purpose of aiding in the understanding of the present disclosure, the above information may be provided as a related art. No statement or determination is made as to whether any of the foregoing is applicable as background art in connection with the present disclosure. Disclosure of Invention Technical solution Various embodiments of the present disclosure may prevent a load from being applied to a motor even in a case where a user applies a force to a door when the door performs an automatic opening or closing operation by a door opening and closing device. The home appliance according to the embodiment may include a door and a door opening and closing device provided to open and close the door. The door opening and closing device may include a motor, a first gear receiving power from the motor and including a hollow portion, a plurality of groove portions formed on an inner circumferential surface in a circumferential direction, and groove walls provided between the plurality of groove portions, a second gear including a rotation shaft inserted into the hollow portion of the first gear, and an elastic body coupled to the rotation shaft, having an elastic force in a radial direction of the rotation shaft, and configured such that a portion thereof protrudes into the groove portions of the first gear. The home appliance according to the embodiment may include a door and a door opening and closing device provided to open and close the door. The door opening and closing device may include a motor, a first gear receiving power from the motor and including a hollow portion, a plurality of groove portions formed on an inner circumferential surface in a circumferential direction, and groove walls provided between the plurality of groove portions, a second gear including a rotation shaft inserted into the hollow portion of the first gear, and an elastic body coupled to the rotation shaft, having an elastic force in a radial direction of the rotation shaft, and configured such that a portion thereof protrudes into the groove portions of the first gear. According to an embodiment, the door opening and closing device may be configured such that the power of the first gear is transmitted to the second gear in a state in which the elastic body is caught on or in contact with the groove wall. According to an embodiment, the plurality of groove portions may include a first groove portion and a second groove portion. The groove wall may be located between the first groove portion and the second groove portion. According to an embodiment, the circumferential lengths of the first groove portion and the second groove portion may be substantially the same. According to an embodiment, the power transmission between the first gear and the second gear may be configured to be released when the elastic body moves along one of the plurality of groove portions. According to an embodiment, the door opening and closing device may include a door side gear unit configured to transmit power between the second gear and the door. According to an embodiment, the diameter of the rotation shaft may be configured to be smaller than the diameter of the hollow portion of the first gear. According to an embodiment, the door may be opened in case the motor is driven such that the first gear rotates in a first direction, and the door may be closed in case the motor is driven such that the first gear rotates in a second direction opposite to the first direction. According to an embodiment, the elastic body may include an upper elastic body and a lower elastic body disposed to be spaced apart in a vertical direction. According to an embodiment, the