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Provided is a driving device for an automatic ice-making machine, the driving device including: a cam gear that rotates a tray; and an operating lever that organically operates along a cam plane for an ice-cube quantity detecting arm formed at the cam gear and allows the ice-cube quantity detecting

Provided is a driving device for an automatic ice-making machine, the driving device including: a cam gear that rotates a tray; and an operating lever that organically operates along a cam plane for an ice-cube quantity detecting arm formed at the cam gear and allows the ice-cube quantity detecting arm to rotate downward into an ice-cube storage bin, wherein a cam groove for the ice-cube quantity detecting arm is formed in the cam plane for the ice-cube quantity detecting arm of the cam gear and allows the operating level to descend so that the ice-cube quantity detecting arm rotates downward into the ice-cube storage bin, and a protrusion is formed between the cam plane for the ice-cube quantity detecting arm and the cam groove for the ice-cube quantity detecting arm and allows the operating lever to ascend so that the ice-cube quantity detecting arm that rotates downward into the ice-cube storage bin rotates upward.

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1. A driving device for an automatic ice-making machine, the driving device comprising: a rotatable cam gear that includes a rotatable cam plane configured to rotate about an axis in a rotation direction anda coupling portion to which a tray is coupled so that the cam gear rotates the tray,the cam p

1. A driving device for an automatic ice-making machine, the driving device comprising: a rotatable cam gear that includes a rotatable cam plane configured to rotate about an axis in a rotation direction anda coupling portion to which a tray is coupled so that the cam gear rotates the tray,the cam plane including a first surface,a protrusion connected to the first surface, anda cam groove including a first portion adjacent to the protrusion and configured to extend obliquely toward the axis from the protrusion, anda second portion connected between the first portion and the first surface, andan operating lever including a rotatably fixed end portion, anda contact portion distally spaced from the rotatably fixed end portion and arranged to be in contact with the cam plane, andthe operating lever being configured to control movement of an ice cube quantity detection arm in response to rotation of the cam plane, the ice cube quantity detecting arm having a pivotally fixed end and an opposite end, the opposite end being positioned in an ice-cube storage bin when the ice cube quantity detecting arm is in an original position, the operating lever being operably connected to the pivotally fixed end of the ice cube quantity detecting arm, wherein when the cam plane rotates in the rotation direction, and the contact portion engages and passes over the first surface, the ice cube quantity detecting arm remains in the original position,wherein when the cam plane further rotates in the rotation direction, and the contact portion engages and passes over the protrusion the protrusion actuates the operating lever to first move the ice-cube quantity detecting arm in a first pivotal direction to move the opposite end upward and then moves the ice cube quantity detecting arm in a second pivotal direction, opposite the first pivotal direction, to move the opposite end downward for returning the ice cube quantity detecting arm back to the original position,wherein when the cam plane further rotates in the rotation direction, and the contact portion engages and passes over the first portion the first portion actuates the operating lever to move the ice-cube quantity detecting arm in the second pivotal direction to thereby move the opposite end downward into the ice-cube storage bin, andwherein when the cam plane further rotates in the rotation direction, and the contact portion engages and passes over the second portion the second portion actuates the operating lever to move the ice-cube quantity detecting arm in the first pivotal direction to move the opposite end upward until the ice cube quantity detecting arm moves back to the original position. 2. The driving device of claim 1, wherein a height of the protrusion and a length of the protrusion in a circumferential direction of the cam plane are respectively smaller than a depth of the cam groove and a length of the cam groove in a circumferential direction of the cam plane. 3. A driving device for an automatic ice-making machine, the driving device comprising: a cam gear that includes a cam plane configured to rotate about an axis in a rotation direction, the cam plane including a first surface, anda cam groove including a first portion adjacent to the first surface and extending obliquely toward the axis from the first surface, and a second portion connected between the first portion and the first surface, anda coupling portion to which a tray is coupled so that the cam gear rotates the tray;a driving portion that rotates the cam gear;an operating lever including a rotatably fixed end portion, anda contact portion distally spaced from the rotatably fixed end portion, and arranged to be in contact with the cam plane and to operate along the cam plane,a spin gear that operably connects the operating lever to an ice-cube quantity detecting arm, the ice cube quantity detecting arm having a pivotally fixed end and an opposite end, the opposite end being positioned in an ice-cube storage bin when the ice cube quantity detecting arm is in an original position; anda case in which the cam gear, the driving portion, the operating lever and the spin gear are placed,wherein the spin gear has two ends, one end of which is disposed in the case and configured to be rotated by the operating lever, and the other end of which protrudes out of the case and is connected to the pivotally fixed end of the ice-cube quantity detecting arm such that the ice-cube quantity detecting arm swings on a plane parallel to the front side of the case when the ice-cube quantity detecting arm is coupled to a center portion of the spin gear,wherein when the cam plane rotates in the rotation direction, and the contact portion engages and passes over the first surface, the ice cube quantity detecting arm remains in the original position,wherein when the cam plane further rotates in the rotation direction, and the contact portion engages and passes over the first portion the first portion actuates the operating lever to move the ice-cube quantity detecting arm in a pivotal direction to thereby move the opposite end downward into the ice-cube storage bin, andwherein when the cam plane further rotates in the rotation direction, and the contact portion engages and passes over the second portion the second portion actuates the operating lever to move the ice-cube quantity detecting arm in another pivotal direction, opposite to the pivotal direction, to move the opposite end upward until the ice cube quantity detecting arm moves back to the original position. 4. The driving device of claim 3, wherein the cam plane further includes a protrusion that protrudes away from a center of rotation of the cam plane, the protrusion being formed between the first surface and the first portion, wherein when the cam plane rotates in the rotation direction, and the contact portion engages and passes over the protrusion the protrusion actuates the operating lever to first move the ice-cube quantity detecting arm in said another pivotal direction to move the opposite end upward and then moves the ice cube quantity detecting arm in said pivotal direction to move the opposite end downward for returning the ice cube quantity detecting arm back to the original position.