Ice maker and refrigerator including the same

Abstract

In the present invention, an ice maker is provided, including a tray and a driving device combined with a full ice detection lever, the driving device including a driving motor, a cam gear rotated by the driving motor and including a shaft, an edge portion forming a gear portion, a first lever cam protruding from the edge portion in a circumferential direction, and a second lever cam surrounding the shaft, a magnetic lever in contact with the first lever cam and movable, a magnet provided in the magnetic lever, and an operation lever in contact with the second lever cam and movable and moving the full ice detection lever, the first lever cam including at least three cam portions protruding from the edge portion of the cam gear toward the center of the cam gear at different heights, the three cam portions being distinguished by a boss interfering with the magnetic lever, the thickness of the cam surface being increased by providing a structure protruding from the edge portion of the cam gear toward the center in the cam of the cam gear rotated by the driving motor, so that the magnitude of the force directly transmitted from the cam gear to the magnetic lever can be reduced.

Description

[0001] This application is a divisional application of patent application CN202010175656.2, filed on March 13, 2020, entitled "Ice Maker and Refrigerator Including the Ice Maker". Technical Field

[0002] This invention relates to an ice maker and a refrigerator including the ice maker. Background Technology

[0003] Typically, refrigerators come with an ice maker. The ice maker takes water supplied from a water source or tank and places it into a tray, then cools the water to make ice (ice making). The ice can be transferred from the ice tray by heating or twisting.

[0004] The ice maker is configured to open upwards and to eject shaped ice, the ice having at least one flat surface, such as a crescent shape or a diamond shape.

[0005] Furthermore, spherical ice shapes make it easier to use and provide users with a different tactile experience. Also, when storing the ice, minimizing the contact area between ice crystals minimizes condensation.

[0006] In connection with this ice maker, the following existing literature has been disclosed.

[0007] [Existing Literature Information]

[0008] 1. Publication Number (Publication Date): Special No. 2001-0051251 (June 25, 2001)

[0009] 2. Title of the Invention: Drive Device for Automatic Ice Maker, Automatic Ice Maker and Refrigerator

[0010] The refrigerators described in existing literature include an automatic ice maker, an ice tray, an ice storage container for receiving ice from the ice tray, and an ice detection arm for detecting the amount of ice in the ice storage container.

[0011] The ice-making tray can separate ice through a twisting motion (rotation), and the ice-detecting arm can detect the amount of ice in the ice storage container through lifting and rotating motion (up and down rotation). Furthermore, the ice-detecting arm can be rotated using power from a DC motor.

[0012] However, according to existing literature, when the ice-detecting arm is located to the side of the DC motor, a portion of the ice-detecting arm is lowered and introduced into the ice storage container. Therefore, space is required to allow the ice-detecting arm to rotate to the side of the DC motor.

[0013] In addition, when there are assembly tolerances between the ice detection arm and the DC motor, the ice detection arm may rub or collide with surrounding structures during rotation, which may result in poor detection.

[0014] Furthermore, when the ice-detecting arm is rotating and part of it is located in the ice storage container, ice may get stuck between the ice-detecting arm and the ice storage container when it separates from the ice-making tray and falls into the ice storage container.

[0015] Furthermore, when the cam gear rotates and the rod moves along the cam surface, the force transmitted from the cam surface to the rod is unbalanced, which may cause the rod shaft to deform. As a result, it may be difficult to detect the sensor signal. Summary of the Invention

[0016] This embodiment provides an ice maker and a refrigerator including the ice maker, wherein ice with uniform overall transparency is generated.

[0017] This embodiment provides an ice maker and a refrigerator including the ice maker, wherein power can be easily transmitted during the movement of the tray to the water supply position, the ice making position or the ice transfer position.

[0018] This embodiment provides an ice maker and a refrigerator including the ice maker, wherein the shape of the cam surface of the cam gear that rotates by a drive motor is improved, thereby preventing warping or wobbling of the magnetic rod that moves along the cam surface.

[0019] Specifically, an ice maker and a refrigerator including the ice maker are provided, wherein increasing the thickness of the surface of the cam protruding towards the inner side of the edge of the cam gear reduces the magnitude of the force transmitted directly from the cam gear to the magnetic rod.

[0020] Furthermore, an ice maker and a refrigerator including the ice maker are provided, wherein each component of the cam corresponding to the position of the tray (water supply position, ice making position, or ice transfer position) is provided with a structure protruding toward the center of the cam gear, thereby increasing the impact transmitted from the cam gear to the magnetic rod, i.e., the pressing force or pressing distance transmitted from the cam gear to the magnetic rod.

[0021] Furthermore, an ice maker and a refrigerator including the ice maker are provided, wherein a shaft support portion that can firmly support the shaft of a magnetic rod supported by the housing is integrally formed with the housing, thereby reducing the assembly tolerance between the magnetic rod and the housing.

[0022] In a refrigerator according to one embodiment of the present invention, the cam of the cam gear that is rotated by the drive motor is provided with a structure that protrudes from the edge of the cam gear toward the center, so as to increase the thickness of the cam surface, thereby reducing the magnitude of the force transmitted directly from the cam gear to the magnetic rod.

[0023] Therefore, it can prevent the magnetic rod from warping or wobbling, thus making it easy to detect the correct position signals of the magnet and Hall sensor.

[0024] Furthermore, the cam of the cam gear includes multiple cam portions. When the tray moves to the water supply position, ice making position, or ice transfer position, the multiple cam portions contact at a location corresponding to each position. The multiple cam portions may be provided with a structure that protrudes toward the center of the cam gear.

[0025] Based on this structure, the impact transmitted from the cam gear to the magnetic rod, i.e., the pressing or applying distance transmitted from the cam gear to the magnetic rod, can be increased, thereby enabling easy detection of the correct position signals of the magnet and the Hall sensor.

[0026] Furthermore, the magnetic rod includes a rod shaft supported by the housing, which is securely supported by a shaft support portion integral with the housing. The connection between the rod shaft and the shaft support portion prevents the magnetic rod from warping or wobbling.

[0027] An ice maker according to an embodiment of the present invention includes: a tray disposed in a storage chamber to form an ice chamber; and a drive device for moving the tray to a water supply position, an ice-making position, and an ice-moving position, wherein the drive device is combined with a full ice detection rod.

[0028] The driving device includes: a drive motor; a cam gear that rotates via the drive motor and includes a shaft, an edge portion forming the gear portion, a first rod cam protruding circumferentially from the edge portion, and a second rod cam surrounding the shaft; a magnetic rod that contacts the first rod cam and is movable, wherein a magnet is disposed on the magnetic rod; and an operating lever that contacts the second rod cam and is movable, and moves the full ice detection rod.

[0029] The first lever cam includes at least three cam portions that protrude at different heights from the edge of the cam gear toward the center of the cam gear, the three cam portions being distinguished by bosses that interfere with the magnetic rod.

[0030] The three cam portions include: a first cam portion having a first contact surface extending in a circumferential direction between a first boss and a second boss; a second cam portion being separated from the first cam portion by the second boss and having a second contact surface extending in a circumferential direction; and a third cam portion being separated from the second cam portion by the third boss and having a third contact surface extending in a circumferential direction.

[0031] The first cam portion includes a boss connecting portion connected to the second boss. The boss connecting portion of the first cam portion has a predetermined thickness in the circumferential direction from the first boss toward the second boss. The thickness S3 of the boss connecting portion of the first cam portion protruding from the edge of the cam gear toward the center is formed to be in the range of 30% to 50% of the maximum thickness S2 of the second boss.

[0032] The second cam portion includes a boss connecting portion connected to the third boss. The boss connecting portion of the second cam portion has a predetermined thickness in the circumferential direction from the second boss toward the third boss. The thickness S3 of the boss connecting portion of the second cam portion protruding from the edge of the cam gear toward the center is formed to be in the range of 30% to 50% of the maximum thickness S2 of the third boss.

[0033] The third cam portion includes a boss connecting portion forming the end of the third cam portion. The boss connecting portion of the third cam portion has a predetermined thickness in the circumferential direction. The boss connecting portion of the third cam portion has the same shape and the same size as the boss connecting portion of the first cam portion and the boss connecting portion of the second cam portion.

[0034] The first contact surface of the first cam portion includes a concave-convex portion that contacts the tray when it is in the ice-making position. The concave-convex portion of the first cam portion includes: a protrusion that protrudes from the edge of the cam gear toward the center of the cam gear; a first inclined portion that extends obliquely from the protrusion toward the first boss; and a second inclined portion that extends obliquely from the protrusion toward the second boss.

[0035] The magnetic rod includes a rod body that extends in an arc or bend, a magnet is provided on one side of the rod body, and a protrusion is provided on the other side of the rod body that contacts the first inclined portion or the second inclined portion.

[0036] The second contact surface of the first cam includes the portion that the magnetic rod contacts when the tray is in the water supply position.

[0037] The second contact surface of the second cam portion includes a concave-convex portion that contacts the tray when it is in the full ice detection position. The concave-convex portion of the second cam portion includes: a protrusion that protrudes from the edge of the cam gear toward the center of the cam gear; a first inclined portion that extends obliquely from the protrusion toward the second boss; and a second inclined portion that extends obliquely from the protrusion toward the third boss.

[0038] The third contact surface of the third cam portion includes a concave-convex portion that contacts the tray when it is in the ice-moving position. The concave-convex portion of the third cam portion includes: a protrusion that protrudes from the edge of the cam gear toward the center of the cam gear; a first inclined portion that extends obliquely from the protrusion toward the third boss; and a second inclined portion that extends obliquely from the protrusion toward the end of the third cam portion.

[0039] The drive device also includes a housing with a shaft support, and the magnetic rod includes a rod shaft that is rotatably coupled to the shaft support.

[0040] The shaft support insert is injection molded into the housing to form a single unit.

[0041] The cam gear further includes: a first groove formed between the edge portion of the cam gear and the first cam portion; a second groove formed between the edge portion of the cam gear and the second cam portion; and a third groove formed between the edge portion of the cam gear and the third cam portion.

[0042] The drive device also includes a Hall sensor, which outputs a first signal and a second signal based on its relative position to the magnetic rod.

[0043] According to the proposed embodiment, the cam surface shape of the cam gear that rotates by the drive motor is improved, thereby preventing warping or wobbling of the magnetic rod that moves along the cam surface.

[0044] Specifically, by increasing the thickness of the surface of the cam protruding from the inside edge of the cam gear, the magnitude of the force transmitted directly from the cam gear to the magnetic rod can be reduced.

[0045] Furthermore, each component of the cam corresponding to the position of the tray (water supply position, ice making position, or ice transfer position) is provided with a structure that protrudes toward the center of the cam gear, thereby increasing the impact transmitted from the cam gear to the magnetic rod, i.e., the pressing force or pressing distance transmitted from the cam gear to the magnetic rod.

[0046] Furthermore, the shaft support portion that can firmly support the shaft of the magnetic rod supported by the housing is integrated with the housing, thereby reducing the assembly tolerance between the magnetic rod and the housing. Attached Figure Description

[0047] Figure 1 This is a perspective view of a refrigerator according to an embodiment of the present invention.

[0048] Figure 2 It is shown Figure 1 A diagram showing the refrigerator door open.

[0049] Figure 3This is a top perspective view of an ice maker according to an embodiment of the present invention.

[0050] Figure 4 This is a lower perspective view of an ice maker according to an embodiment of the present invention.

[0051] Figure 5 This is an exploded perspective view of an ice maker according to an embodiment of the present invention.

[0052] Figure 6 This is a perspective view of the lower component according to an embodiment of the present invention.

[0053] Figure 7 It is along Figure 3 A sectional view taken along line 7-7.

[0054] Figure 8 This diagram shows the state of water supply completion with the lower tray moved to the water supply position.

[0055] Figure 9 This diagram shows the lower tray in the ice-making position.

[0056] Figure 10 This is a diagram showing the state of ice making after it is completed at the ice-making location.

[0057] Figure 11 This is a diagram showing the lower tray during the initial stage of ice removal.

[0058] Figure 12 This is a diagram showing the position of the lower tray at the full ice detection location.

[0059] Figure 13 This is a diagram showing the lower tray at the ice removal location.

[0060] Figure 14 This is an exploded perspective view of a driving device according to an embodiment of the present invention.

[0061] Figure 15 This is a top view showing the internal structure of a drive device according to an embodiment of the present invention.

[0062] Figure 16 This is a bottom view showing the bottom structure of the second housing according to an embodiment of the present invention.

[0063] Figure 17 This is a perspective view showing the structure of a cam gear and a magnetic rod according to an embodiment of the present invention.

[0064] Figure 18 This is a diagram showing the front view of a cam gear according to an embodiment of the present invention.

[0065] Figure 19 This is a diagram showing the back structure of a cam gear according to an embodiment of the present invention.

[0066] Figure 20 This is a diagram showing the structure of the cam surface on the back side of a cam gear according to an embodiment of the present invention.

[0067] Figure 21A This is a diagram showing the state of the magnetic rod in the correct position and the position of the error detection.

[0068] Figure 21B It shows when Figure 21A The diagram shows the state in which force is directly transmitted from the cam gear toward the magnetic rod when the magnetic rod is in the error detection position.

[0069] Figure 21C This is a diagram illustrating the state in which force is transmitted from the cam gear toward the magnet when the cam surface shape of the cam gear is realized according to an embodiment of the present invention.

[0070] Figure 22A and Figure 22B This diagram illustrates a state in which the shaft may warp depending on its position when no protrusion, first inclined portion, and second inclined portion are provided on the cam surface of the cam gear according to an embodiment of the present invention.

[0071] Figure 23 This is a diagram illustrating a state in which a cam gear has a protrusion, a first inclined portion, and a second inclined portion on its cam surface, according to an embodiment of the present invention.

[0072] Figure 24 This is a partial cross-sectional view showing the state in which the magnetic rod is attached to the first housing according to an embodiment of the present invention.

[0073] Figure 25 It is magnification Figure 24 The diagram of part "A". Detailed Implementation

[0074] Hereinafter, some embodiments of the present invention will be described in detail with reference to the exemplary accompanying drawings. When affixing reference numerals to the constituent elements of each drawing, it should be noted that, even when shown in different drawings, the same reference numerals should be used as much as possible for the same constituent elements. Furthermore, in describing embodiments of the present invention, detailed descriptions of related well-known structures or functions are omitted if it is determined that such detailed descriptions might affect the understanding of the embodiments of the present invention.

[0075] Furthermore, when describing the constituent elements of embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the constituent element from other constituent elements, and the nature, sequence, or order of the corresponding constituent elements are not limited by these terms. When a constituent element is described as being "connected," "combined," or "connected" to another constituent element, it should be understood that a constituent element may be directly connected or connected to another constituent element, but other constituent elements may also be "connected," "combined," or "connected" between each constituent element.

[0076] Figure 1 This is a perspective view of a refrigerator according to an embodiment of the present invention. Figure 2 It is shown Figure 1 A diagram showing the refrigerator door open.

[0077] Reference Figure 1 and Figure 2 According to one embodiment of the present invention, a refrigerator 1 may include: a cabinet 2 forming a storage space; and a door for opening and closing the storage space.

[0078] In detail, the box 2 forms a storage space that is divided into upper and lower sections by partitions, and a refrigerator compartment 3 can be formed in the upper part and a freezer compartment 4 can be formed in the lower part.

[0079] The interior of the refrigerator compartment 3 and the freezer compartment 4 can be provided with storage components such as drawers, shelves, and baskets.

[0080] The doors may include a refrigerator door 5 that covers the refrigerator compartment 3 and a freezer door 6 that covers the freezer compartment 4.

[0081] The refrigerator door 5 can be composed of a pair of doors on the left and right sides, and can be opened and closed by rotating. The freezer door 6 can be configured to be pulled out and pushed in like a drawer.

[0082] Of course, the configuration of the refrigerator compartment 3 and the freezer compartment 4, as well as the form of the door, can vary depending on the type of refrigerator. This invention can be applied to various types of refrigerators and is not limited thereto. For example, the freezer compartment 4 and the refrigerator compartment 3 can be arranged side by side, or the freezer compartment 4 can be located on top of the refrigerator compartment 3.

[0083] An ice maker 100 may be installed in the freezer compartment 4. The ice maker 100 is used to turn supplied water into ice, which can produce spherical ice.

[0084] An ice box 102 may also be provided below the ice maker 100, where the ice produced is stored after being transferred from the ice maker 100.

[0085] The ice maker 100 and ice box 102 can also be installed inside the freezer compartment 4 in a state where they are housed in a separate outer casing 101.

[0086] Users can obtain ice by opening the freezer door 6 and approaching the ice box 102.

[0087] The freezer compartment 4 may be provided with a duct (not shown) for supplying cold air to the freezer compartment 4. Air discharged from the duct can flow into the freezer compartment 4 after passing through the ice maker 100 side.

[0088] As another example, the refrigerator door 5 may be equipped with a dispenser 7 for extracting purified water or produced ice from the outside.

[0089] Ice generated by the ice maker 100 or ice generated by the ice maker 100 and stored in the ice box 102 is transferred to the dispenser 7 by a transfer device, so that the user can obtain ice from the dispenser 7.

[0090] Alternatively, the ice maker 100 can be installed on the door of the refrigerator or freezer compartment.

[0091] The ice maker will now be described in detail with reference to the accompanying drawings.

[0092] Figure 3 This is a top perspective view of an ice maker according to an embodiment of the present invention. Figure 4 This is a lower perspective view of an ice maker according to an embodiment of the present invention. Figure 5 This is an exploded perspective view of an ice maker according to an embodiment of the present invention.

[0093] Reference Figures 3 to 5 The ice maker 100 may include an upper component 110 (or an upper tray component) and a lower component 200 (or a lower tray component).

[0094] The upper component 110 may be named the first tray component, and the lower component 200 may be named the second tray component.

[0095] The lower component 200 is movable relative to the upper component 110. As an example, the lower component 200 is rotatable relative to the upper component 110.

[0096] When the lower component 200 is in contact with the upper component 110, it can generate spherical ice together with the upper component 110.

[0097] That is, the upper component 110 and the lower component 200 form an ice chamber 111 for generating spherical ice. The ice chamber 111 is substantially spherical.

[0098] Of course, the upper component 110 and the lower component 200 can also generate ice of various non-spherical shapes.

[0099] It should be clarified that the term "spherical or hemispherical" in this invention includes not only geometrically complete spheres or hemispheres, but also geometrically similar shapes to complete spheres or hemispheres.

[0100] The upper component 110 and the lower component 200 can form a plurality of separate ice chambers 111.

[0101] The following example illustrates the case where the upper component 110 and the lower component 200 form three ice chambers 111. It should be noted that the number of ice chambers 111 is not limited.

[0102] With the ice chamber 111 formed by the upper component 110 and the lower component 200, water can be supplied to the ice chamber 111 through the water supply unit 190.

[0103] The water supply unit 190 is integrated with the upper component 110 and guides water supplied from the outside into the ice chamber 111.

[0104] After ice is made, the lower component 200 can rotate in the forward direction, and the spherical ice formed between the upper component 110 and the lower component 200 can be separated from the upper component 110 and the lower component 200.

[0105] The ice maker 100 may also include a drive device 400 that enables the lower assembly 200 to rotate relative to the upper assembly 110.

[0106] The drive unit 400 may include a drive motor and a power transmission section for transmitting power from the drive motor to the lower assembly 200. The power transmission section may include one or more gears.

[0107] The drive motor can be a motor capable of bidirectional rotation. Therefore, the lower assembly 200 can rotate in both directions.

[0108] The ice maker 100 may also include an upper ejector 300 to allow ice to be separated from the upper assembly 110.

[0109] The upper pusher 300 can separate ice that is in close contact with the upper component 110 from the upper component 110.

[0110] The upper ejector 300 may include: an ejector body 310; and one or more upper ejector pins 320 extending from the ejector body 310 in a cross direction. The number of upper ejector pins 320 may be the same as the number of ice chambers 111, but is not limited thereto.

[0111] Separation prevention protrusions 312 may be provided at both ends of the ejector body 310. When the ejector body 310 is engaged with the connecting unit 350 (described later), the separation prevention protrusions 312 are used to prevent the ejector body 310 from separating from the connecting unit 350.

[0112] As an example, a pair of separation prevention protrusions 312 can protrude from the ejector body 310 in opposite directions.

[0113] As the upper push-out pin 320 is introduced into the ice chamber 111 through the upper component 110, it can press the ice inside the ice chamber 111.

[0114] Ice pressed by the upper push pin 320 can be separated from the upper component 110.

[0115] Furthermore, the ice maker 100 may also include a lower ejector 330 to separate ice that is in close contact with the lower assembly 200.

[0116] The lower ejector 330 can separate ice adhering to the lower assembly 200 by pressing the lower assembly 200. As an example, the lower ejector 330 can be fixed to the upper assembly 110.

[0117] The lower ejector 330 may include: an ejector body 331; and one or more lower ejector pins 332 protruding from the ejector body 331. The number of lower ejector pins 332 may be the same as the number of ice chambers 111, but is not limited thereto.

[0118] During the rotation of the lower assembly 200 used for ice removal, the rotational force of the lower assembly 200 can be transmitted to the upper pusher 300.

[0119] Therefore, the ice maker 100 may further include a connecting unit 350 connecting the lower assembly 200 and the upper ejector 300. The connecting unit 350 may include one or more connecting rods.

[0120] As an example, the connecting unit 350 may include: a first link 352 for rotating the lower support member 270; and a second link 356 connected to the lower support member 270. When the lower support member 270 rotates, the second link 356 is used to transmit the rotational force of the lower support member 270 to the upper pusher 300.

[0121] As an example, when the lower assembly 200 rotates in the forward direction, the upper ejector 300 descends under the action of the connecting unit 350, allowing the upper ejector pin 320 to press the ice. Conversely, when the lower assembly 200 rotates in the reverse direction, the upper ejector 300 rises and returns to its original position under the action of the connecting unit 350.

[0122] The upper component 110 and the lower component 200 will now be described in further detail.

[0123] The upper assembly 110 may include an upper tray 150 forming part of an ice chamber 111 for ice making. As an example, the upper tray 150 defines an upper portion of the ice chamber 111. The upper tray 150 may be referred to as a first tray. Alternatively, the upper tray 150 may be referred to as an upper moldpart.

[0124] The upper assembly 110 may further include an upper housing 120 and an upper support 170 for fixing the position of the upper tray 150.

[0125] The upper tray 150 may be located below the upper housing 120. A portion of the upper support 170 may be located below the upper tray 150.

[0126] As described above, the upper housing 120, upper tray 150, and upper support 170, which are aligned vertically, can be fastened by fastening members. That is, the upper tray 150 can be fixed to the upper housing 120 by fastening the fastening members.

[0127] The upper support 170 can support the lower side of the upper tray 150 to restrict its downward movement.

[0128] As an example, the water supply unit 190 can be fixed to the upper housing 120.

[0129] The ice maker 100 may also include a temperature sensor 500 for detecting the temperature of the water or the temperature of the ice in the ice chamber 111.

[0130] As an example, the temperature sensor 500 can indirectly detect the temperature of the water or ice in the ice chamber 111 by detecting the temperature of the upper tray 150.

[0131] As an example, the temperature sensor 500 can be mounted on the upper housing 120. When the upper tray 150 is fixed to the upper housing 120, the temperature sensor 500 can contact the upper tray 150.

[0132] Additionally, the lower assembly 200 may include a lower tray 250, which forms another part of the ice chamber 111 for ice making. As an example, the lower tray 250 defines a lower portion of the ice chamber 111. The lower tray 250 may be referred to as a second tray. Alternatively, the lower tray 250 may be referred to as a lower mold part.

[0133] The lower assembly 200 may further include: a lower support 270 supporting the lower side of the lower tray 250; and a lower housing 210, at least a portion of which covers the upper side of the lower tray 250. The lower housing 210, the lower tray 250, and the lower support 270 may be fastened by fastening members.

[0134] Additionally, the ice maker 100 may also include a switch 600 for starting / stopping the ice maker 100. When the user operates the switch 600 to the start state, ice can be made by the ice maker 100.

[0135] That is, when the switch 600 is turned on, the following processes can be repeatedly executed: ice-making process, supplying water to the ice maker 100 and using cold air to make ice; and ice-removing process, rotating the lower assembly 200 to separate the ice.

[0136] Conversely, when the switch 600 is operated to the closed state, ice cannot be made by the ice maker 100. As an example, this switch 600 may be located in the upper housing 120.

[0137] The ice maker 100 may further include a full ice detection rod 700. The full ice detection rod 700 can be rotated by receiving power from the drive device 400 and can detect whether the ice box 102 is full of ice.

[0138] One side of the full ice detection rod 700 can be connected to the drive device 400, and the other side can be connected to the upper housing 120.

[0139] As an example, the other side of the full ice detection rod 700 can be rotatably connected to the upper housing 120 below the connecting shaft 370 of the connecting unit 350. Therefore, the rotation center of the full ice detection rod 700 can be located at a lower position than the connecting shaft 370.

[0140] Furthermore, the drive device 400 may also include: a cam gear 430, which receives the rotational power of the drive motor and rotates, and has a cam surface; and a magnetic rod 460 (see reference). Figure 14 The magnetic rod 460 moves along the cam surface. The magnet 468 (see reference) Figure 14 The drive device 400 may be configured to be located on the magnetic rod 460. The drive device 400 may also include a Hall sensor 423 that can detect the magnet 468 during the movement of the magnetic rod 460.

[0141] The full ice detection rod 700 can be combined with the drive device 400 so that it rotates together with the lower component 200 when the lower component 200 rotates.

[0142] Depending on whether the Hall sensor 423 detects the magnet 468, the Hall sensor 423 can output a first signal and a second signal as different outputs. Either the first signal or the second signal can be a high signal, and the other can be a low signal.

[0143] The full ice detection rod 700 can rotate from the standby position (the ice-making position of the lower component) to the full ice detection position to detect full ice.

[0144] When the full ice detection rod 700 is in the standby position, at least a portion of the full ice detection rod 700 may be located below the lower component 200.

[0145] The full ice detection rod 700 may include a detection body 710. The detection body 710 may be located at the lowest side during the rotation of the full ice detection rod 700.

[0146] The entire detection body 710 can be located below the lower assembly 200 to prevent interference between the lower assembly 200 and the detection body 710 during the rotation of the lower assembly 200. When the ice box 102 is full of ice, the detection body 710 can come into contact with the ice inside the ice box 102.

[0147] The full ice detection rod 700 can be a rod in the form of a wire. That is, the full ice detection rod 700 can be formed by repeatedly bending a wire with a specified diameter.

[0148] The detection body 710 can extend in a direction parallel to the extension direction of the connecting shaft 370. Regardless of its location, the detection body 710 can be positioned lower than the lowest point of the lower component 200.

[0149] The full ice detection rod 700 may further include a pair of extensions 720 and 730 extending upward from both ends of the detection body 710. The pair of extensions 720 and 730 may extend substantially in parallel. The pair of extensions 720 and 730 may include a first extension 720 and a second extension 730.

[0150] The horizontal length of the detection body 710 can be longer than the vertical length of each of the pair of extensions 720 and 730. The interval between the pair of extensions 720 and 730 can be longer than the horizontal length of the lower assembly 200. Therefore, during the rotation of the full ice detection rod 700 and the rotation of the lower assembly 200, interference between the pair of extensions 720 and 730 and the lower assembly 200 can be prevented.

[0151] Each of the pair of extensions 720 and 730 may include: a first extension rod 722, 732 extending from the detection body 710; and a second extension rod 721, 731 extending from the first extension rod 722, 732 at a predetermined angle.

[0152] The full ice detection rod 700 may further include a pair of connecting portions 740, 750 extending from the ends of the pair of extensions 720, 730. The pair of connecting portions 740, 750 may include a first connecting portion 740 extending from the first extension 720 and a second connecting portion 750 extending from the second extension 730.

[0153] As an example, the pair of connecting portions 740, 750 can extend from the second extension rods 721, 731. The first connecting portion 740 and the second connecting portion 750 can extend from each of the extension portions 720, 730 in a direction away from each other. The first connecting portion 740 can be connected to the drive device 400, and the second connecting portion 750 can be connected to the upper housing 120.

[0154] At least a portion of the first connecting portion 740 may extend in a horizontal direction. That is, at least a portion of the first connecting portion 740 may be parallel to the detection body 710. The first connecting portion 740 and the second connecting portion 750 provide the rotation center of the full ice detection rod 700.

[0155] In this embodiment, the second coupling portion 750 can be coupled to the upper housing 120 in an idle state. Therefore, the first coupling portion 740 can substantially provide the rotation center of the full ice detection rod 700.

[0156] The second joint 750 can penetrate the upper housing 120. A hole 120a can be formed in the upper housing 120 to allow the second joint 750 to pass through.

[0157] Figure 6 This is a perspective view of the lower component according to an embodiment of the present invention.

[0158] Reference Figure 6 The lower assembly 200 may include a lower tray 250 and a lower support member 270. The lower assembly 200 may also include a lower housing 210.

[0159] The lower housing 210 may surround a portion of the periphery of the lower tray 250, and the lower support 270 may support the lower tray 250. The connecting unit 350 may be coupled to the lower support 270.

[0160] The connecting unit 350 may include: a first link 352, which receives power from the driving device 400 for rotating the lower support member 270; and a second link 356, which is connected to the lower support member 270 for transmitting the rotational force of the lower support member 270 when it rotates to the upper pusher 300.

[0161] The first connecting rod 352 and the lower support member 270 can be connected by an elastic member 360. For example, the elastic member 360 can be a coil spring. One end of the elastic member 360 is connected to the first connecting rod 352, and the other end is connected to the lower support member 270.

[0162] The elastic member 360 provides an elastic force to the lower support member 270 to maintain the upper tray 150 in contact with the lower tray 250.

[0163] In this embodiment, a first connecting rod 352 and a second connecting rod 356 may be provided on both sides of the lower support member 270. Either of the two first connecting rods 352 is connected to the drive device 400 to receive rotational force from the drive device 400.

[0164] The two first links 352 can be connected by a connecting shaft 370.

[0165] A hole 358 may be formed at the upper end of the second link 356, through which the ejector body 310 of the upper ejector 300 can pass.

[0166] The lower support 270 may also include a plurality of hinge bodies 281, 282 for connection to each hinge support 135, 136 of the upper housing 120.

[0167] The plurality of hinge bodies 281, 282 may be arranged spaced apart from each other. Each hinge body 281, 282 may also include a hinge hole. The shaft connection portion 353 of the first connecting rod 352 may pass through the hinge hole. The connecting shaft 370 may be connected to the shaft connection portion 353.

[0168] The lower support member 270 may further include a connecting shaft 283, to which the second connecting rod 356 is rotatably connected. The connecting shaft 283 may be respectively disposed on both sides of the outer wall of the lower support member 270.

[0169] The lower support member 270 may further include an elastic member engagement portion 284 for engaging with the elastic member 360. The elastic member engagement portion 284 may form a space capable of accommodating a portion of the elastic member 360.

[0170] The first connecting rod 352 may further include a shaft support 354, to which the upper shaft 431a of the cam gear 430 is coupled. The shaft connection portion 353 may be disposed on one of the two sides of the first connecting rod 352, and the shaft support 354 may be disposed on the other side. The one side and the other side may be opposite to each other.

[0171] Figure 7 It is along Figure 3 A sectional view taken along line 7-7.

[0172] Reference Figure 7 The lower heater 296 can be disposed on the lower support member 270. The lower heater 296 provides heat to the ice chamber 111 during the ice-making process, so that the ice freezes from the upper side in the ice chamber 111.

[0173] Furthermore, since the lower heater 296 generates heat during the ice-making process, the air bubbles in the ice chamber 111 move downwards during ice-making, making the portion of the spherical ice transparent except for the bottommost part when ice-making is complete. That is, according to this embodiment, substantially transparent spherical ice can be generated.

[0174] As an example, the lower heater 296 may be a wire-type heater.

[0175] The lower heater 296 can contact the lower tray 250 to provide heat to the lower chamber 252. Alternatively, the lower heater 296 can contact the lower tray body 251.

[0176] The upper tray 150 and the lower tray 250 are in contact in the vertical direction, thus completing the ice chamber 111. The bottom surface 151a of the upper tray body 151 is in contact with the top surface 251e of the lower tray body 251.

[0177] At this time, with the top surface 251e of the lower tray body 251 in contact with the bottom surface 151a of the upper tray body 151, the elastic force of the elastic member 360 is applied to the lower support member 270.

[0178] The elastic force of the elastic member 360 is applied to the lower tray 250 through the lower support member 270, thereby pressing the top surface 251e of the lower tray body 251 against the bottom surface 151a of the upper tray body 151. Therefore, when the top surface 251e of the lower tray body 251 is in contact with the bottom surface 151a of the upper tray body 151, the pressing force between the surfaces is increased.

[0179] With the bottom surface 151a of the upper pallet body 151 placed on the top surface 251e of the lower pallet body 251, the upper pallet body 151 can be accommodated in the internal space of the outer perimeter wall 260 of the lower pallet 250.

[0180] At this time, the vertical wall 153a of the upper tray body 151 is configured to face the vertical wall 260a of the lower tray 250, and the curved wall 153b of the upper tray body 151 is configured to face the curved wall 260b of the lower tray 250.

[0181] The lower tray body 251 may further include a protrusion 251b extending upward from its lower side. A recess 251c is formed on the lower side of the protrusion 251b such that the thickness of the protrusion 251b is substantially the same as the thickness of the other parts of the lower tray body 251. In this specification, "substantially the same" means a concept that includes being completely identical and, while not completely identical, being almost indistinguishably similar.

[0182] When water is supplied to the ice chamber 111, and cold air is supplied to the ice chamber 111, the liquid water phase changes into solid ice. At this time, during the process of water phase changing into ice, the water expands, and the expansion force of the water is transmitted to the upper tray body 151 and the lower tray body 251 respectively.

[0183] In this embodiment, considering the deformation of the lower tray body 251, a protrusion 251b is formed on the lower tray body 251 to make the produced ice as close as possible to a complete sphere.

[0184] In this embodiment, the water supplied to the ice chamber 111 is not spherical before ice making I, but after ice making I is completed, the protrusion 251b of the lower tray body 251 deforms toward the lower opening 274, thus generating spherical ice.

[0185] Figure 8 This diagram shows the state of water supply completion with the lower tray moved to the water supply position. Figure 9 This diagram shows the lower tray in the ice-making position. Figure 10 This is a diagram showing the state of ice making after ice making is complete at the ice-making location. Figure 11 This is a diagram showing the lower tray during the initial stage of ice transfer. Figure 12 This is a diagram showing the position of the lower tray at the full ice detection location. Figure 13 This is a diagram showing the lower tray at the ice removal location.

[0186] Reference Figures 8 to 13 In order to generate ice in the ice maker 100, the lower tray 250 is moved to the water supply position.

[0187] In this instruction manual, the lower tray 250 can be removed from... Figure 9 ice-making location towards Figure 13 The direction in which the ice is moved is called forward movement (or forward rotation). Conversely, it can be considered as moving from... Figure 13 The location of the ice move towards Figure 8 The direction in which the water supply position moves is called reverse movement (or reverse rotation).

[0188] When the lower tray 250 is detected to have moved to the water supply position, the drive device 400 stops and begins to supply water while the lower tray 250 is in the water supply position.

[0189] After the water supply is completed, the drive device 400 operates, allowing the lower tray 250 to move towards the ice-making position. When the lower tray 250 moves in the reverse direction, the top surface 251e of the lower tray 250 approaches the bottom surface 151a of the upper tray 150.

[0190] Then, the water between the top surface 251e of the lower tray 250 and the bottom surface 151a of the upper tray 150 is separated and distributed to the plurality of lower chambers 252. When the top surface 251e of the lower tray 250 is completely in contact with the bottom surface 151a of the upper tray 150, the upper chamber 152 is filled with water.

[0191] The movement of the lower tray 250 in the ice-making position is detected by a Hall sensor 423. When the lower tray 250 is detected to have moved to the ice-making position, the drive device 400 stops.

[0192] Ice making begins when the lower tray 250 is moved to the ice-making position. For example, ice making can begin when the lower tray 250 reaches the ice-making position. Alternatively, ice making can begin when the lower tray 250 reaches the ice-making position and the water supply time has elapsed for a set period.

[0193] When ice making begins, the lower heater 296 is activated, and the heat from the lower heater 296 is transferred into the ice chamber 111. If ice making is performed while the lower heater 296 is activated, ice is formed in the ice chamber 111 starting from the top.

[0194] When ice making is complete, one or more of the upper heater 148 and lower heater 296 are activated to remove the ice. When one or more of the upper heater 148 and lower heater 296 are activated, the heat from heaters 148 and 296 can be transferred to one or more of the upper tray 150 and lower tray 250, so that the ice can be separated from one or more of the surfaces (inner surfaces) of the upper tray 150 and lower tray 250.

[0195] To facilitate ice removal, the lower tray 250 can be moved in the forward direction. For example... Figure 11 As shown, when the lower tray 250 moves in the forward direction, the lower tray 250 is separated from the upper tray 150.

[0196] From the lower tray 250 Figure 9 ice-making location towards Figure 12 During the movement of the full ice detection position, it is possible to detect whether the ice box 102 is full of ice.

[0197] If it is determined that the ice box 102 was not full of ice during the ice-moving process, such as Figure 13 As shown, the lower tray 250 can be rotated to the ice-moving position. During the movement of the lower tray 250 to the ice-moving position, the lower tray 250 contacts the lower push-out pin 332.

[0198] With the lower tray 250 in contact with the lower push-out pin 332, as the lower tray 250 continues to rotate forward, the lower push-out pin 332 presses down on the lower tray 250, causing it to deform. The pressing force of the lower push-out pin 332 is transmitted to the ice, allowing it to separate from the surface of the lower tray 250. The ice separated from the surface of the lower tray 250 can fall downwards and be stored in the ice box 102.

[0199] After the ice separates from the lower tray 250, the lower tray 250 rotates in the opposite direction again under the action of the drive device 400 and can be moved to the water supply position.

[0200] Conversely, when it is determined that the ice box 102 is full of ice, the lower tray 250 can rotate in the opposite direction and move to the water supply position, and can standby for a set time until the ice is de-iced.

[0201] Figure 14 This is an exploded perspective view of a driving device according to an embodiment of the present invention. Figure 15 This is a top view showing the internal structure of a drive device according to an embodiment of the present invention. Figure 16 This is a bottom view showing the bottom structure of the second housing according to an embodiment of the present invention.

[0202] Reference Figures 14 to 16 According to one embodiment of the present invention, the driving device 400 includes a driving housing 410, 480 forming the appearance and a plurality of components disposed in the driving housing 410, 480.

[0203] The plurality of components may include: a drive unit 420; a cam gear 430, which rotates via the drive unit 420 and causes the lower tray 250 to rotate; a magnetic rod 460, which moves along a first cam 436 of the cam gear 430; and an operating lever 440, which moves along a second cam 437 of the cam gear 430.

[0204] Furthermore, the drive device 400 may also include a rod connection portion 450, which rotates via the operating rod 440 and causes the full ice detection rod 700 to rotate (oscillate) left and right.

[0205] The drive housings 410 and 480 may include: a first housing 410, in which the drive unit 420, cam gear 430, operating lever 440, lever engagement part 450 and magnetic rod 460 are built; and a second housing 480, which covers the first housing 410.

[0206] The drive unit 420 may include a drive motor 422. The drive motor 422 generates power to rotate the cam gear 430.

[0207] The drive unit 420 may further include a control board 421 integrated inside the first housing 410. The drive motor 422 may be connected to the control board 421.

[0208] A Hall sensor 423 may be provided on the control board 421. The Hall sensor 423 can output a first signal and a second signal according to its relative position with the magnetic rod 460.

[0209] The second housing 480 includes a housing body 481 and a first housing hole 482 and a second housing hole 483 that pass through the housing body 481.

[0210] The cam gear 430 includes: a circular gear body 431; and an upper shaft 431a, which protrudes from the gear body 431, passes through the first housing hole 482, and is coupled to the shaft support 354 of the connecting unit 350.

[0211] The cam gear 430 also includes a gear portion 435 disposed along the circular edge of the gear body 431.

[0212] A limiting groove 438a is formed on the front side of the cam gear 430. The limiting groove 438a is recessed in the circumferential direction, and the limiting rib 485 of the second housing 480 is inserted into the limiting groove 438a.

[0213] A weight-reducing groove 438b is formed on the front side of the cam gear 430. The weight-reducing groove 438b is recessed in the circumferential direction and is used to reduce the mass of the cam gear 430.

[0214] A reduction gear 470 may be provided between the cam gear 430 and the drive motor 422 to reduce the rotational force of the drive motor 422 and transmit the reduced rotational force to the cam gear 430.

[0215] The reduction gear 470 may include: a first reduction gear 471 connected to the drive motor 422 in a manner capable of transmitting power; a second reduction gear 472 meshing with the first reduction gear 471; and a third reduction gear 473 connected to the second reduction gear 472 and the cam gear 430 in a manner capable of transmitting power.

[0216] One end of the operating lever 440 is rotatably inserted into and engaged with the rotating shaft of the third reduction gear 473, and the gear 442 formed at the other end of the operating lever 440 is connected to the lever engagement portion 450 in a power-transmitting manner. That is, when the operating lever 440 moves, the lever engagement portion 450 rotates.

[0217] One end of the rod connection 450 is rotatably connected to the operating rod 440 inside the housings 410 and 480. The other end of the rod connection 450 protrudes from the second housing hole 483 of the second housing 480 and is connected to the full ice detection rod 700.

[0218] The magnetic rod 460 may include: a rod body 461 (refer to...) Figure 17 The first protrusion 463 is rotatably disposed on the housing 410, 480; the first protrusion 463 is organically linked with the first cam 436 of the cam gear 430; and the magnet 468 is detected by the Hall sensor 423.

[0219] During the movement of the magnetic rod 460, when the Hall sensor 423 detects the magnet 468, the Hall sensor 423 outputs a first signal, and when the magnet 468 is removed from the detection position of the Hall sensor 423, the Hall sensor 423 outputs a second signal.

[0220] The drive device 400 further includes a brake lever 490 for limiting the rotation of the cam gear 430. The brake lever 490 includes: a lever body 491; a coupling protrusion 492 disposed on one side of the lever body 491 and coupled to the housings 410 and 480; and a brake protrusion 493 disposed on the other side of the lever body 491.

[0221] As an example, when the lower tray 250 is in the ice-making position, the braking protrusion 492 can interfere with the boss 436a1 provided on the first lever cam 436, thereby preventing the cam gear 430 from interfering with the ice-making position. Figure 22B Based on this, move further in a counter-clockwise direction.

[0222] Conversely, when the lower tray 250 is in the ice-moving position, the brake protrusion 492 can contact the surface of the first lever cam 436.

[0223] The drive device 400 may further include an elastic member 495, which is coupled to the magnetic rod 460 to provide a restoring force to the magnetic rod 460. One end of the elastic member 495 may be connected to the second protrusion 464 of the magnetic rod 460, and the other end may be fixed to the housing 410, 480.

[0224] As an example, the elastic member 495 may include a spring.

[0225] The second housing 480 includes a first housing hole 482 and a second housing hole 483 formed in the housing body 481. The upper shaft 431a of the cam gear 430 passes through the first housing hole 482, and the rod engagement portion 450 passes through the second housing hole 483.

[0226] A cam gear mounting portion 481a is formed in the housing body 481, and the cam gear 430 is mounted in the cam gear mounting portion 481a. The cam gear mounting portion 481a is formed by a recess in at least a portion of the housing body 481.

[0227] A limiting rib 485 is provided in the cam gear mounting portion 481a. The limiting rib 485 can protrude from the cam gear mounting portion 481a and is inserted into the limiting groove 438a of the cam gear 430. When the cam gear 430 rotates, the limiting rib 485 can move relative to the inside of the cam gear mounting portion 481a.

[0228] Depending on the rotation direction of the cam gear 430, the two ends of the limiting rib 485 may interfere with the two ends of the limiting groove 438a. The two ends of the limiting rib 485 include a first end 486a and a second end 486b.

[0229] When the cam gear 430 rotates in one direction, if the first end 486a interferes with one end of the limiting groove 438a, the cam gear 430 can be restricted from rotating further in one direction.

[0230] Conversely, when the cam gear 430 rotates in the other direction, if the second end 486b interferes with the other end of the limiting groove 438a, the cam gear 430 can be restricted from rotating further in the other direction.

[0231] The housing body 481 includes a gear groove 484, and at least a portion of the third reduction gear 473 is inserted into the gear groove 484.

[0232] The first housing 410 includes a lower shaft 432 (see reference) of the cam gear 430. Figure 17 The first shaft engagement portion 412 is connected to the cam gear 430. The cam gear 430 can be rotatably supported on the first housing 410 via the first shaft engagement portion 412.

[0233] The first housing 410 also includes a rod shaft 462 (see reference) coupled to the magnetic rod 460. Figure 17 The second shaft connection portion 414. The magnetic rod 460 can be rotatably supported on the first housing 410 via the second shaft connection portion 414.

[0234] Figure 17 This is a perspective view showing the structure of a cam gear and a magnetic rod according to an embodiment of the present invention. Figure 18 This is a diagram showing the front view of a cam gear according to an embodiment of the present invention. Figure 19 This is a diagram showing the back structure of a cam gear according to an embodiment of the present invention.

[0235] First, refer to Figure 17 According to one embodiment of the present invention, the magnetic rod 460 includes: a rod body 461 having an arcuately extending portion; and protrusions 463 and 464 disposed at the end of the rod body 461 and protruding toward the cam gear 430.

[0236] A rod shaft 462 may be provided on one side of the rod body 461, protruding toward the first housing 410, and protrusions 463 and 464 may be provided on the other side of the rod body 461. One side and the other side of the rod body 461 may form opposite surfaces to each other.

[0237] The rod shaft 462 can be configured to be closer to the protrusions 463 and 464 than the magnet 468, with the center of the rod body 461 as a reference.

[0238] The protrusions 463 and 464 include a first protrusion 463 that contacts the surface of the first lever cam 436. When the cam gear 430 rotates, the first protrusion 463 moves along the surface of the first lever cam 436.

[0239] The protrusions 463 and 464 include a second protrusion 464 connected to the elastic member 495 to receive restoring force from the elastic member 495.

[0240] The cam gear 430 includes: a gear body 431 having a disk shape; and a gear portion 435 formed in a circumferential direction along the edge of the gear body 431.

[0241] The cam gear 430 also includes a lower shaft 432 protruding from one side of the gear body 431, and a first lever cam 436 and a second lever cam 437 are provided on one side of the gear body 431.

[0242] The limiting groove 438a and the weight reduction groove 438b may be formed on the other side of the gear body 431. One side of the gear body 431 and the other side of the gear body 431 may be opposite to each other.

[0243] Reference Figure 18 and Figure 19The limiting groove 438a and the weight reduction groove 438b provided on the cam gear 430 are formed in the circumferential direction (arc shape).

[0244] With the center C1 of the cam gear 430, i.e. the part where the upper shaft 431a is provided, as the center, the limiting groove 438a and the weight reduction groove 438b can be formed to have a predetermined radius of curvature respectively.

[0245] With the center C1 of the cam gear 430 as a reference, the center angle θ1 of the limiting groove 438a can be formed in the range of approximately 210° to 240°.

[0246] The center angle θ1 of the limiting groove 438a is a value determined by taking into account the rotation angle of the cam gear 430, corresponding to the range of angles formed by the lower tray 250 in the water supply position, ice making position and ice moving position, separated by a specified safety factor.

[0247] For example, in Figure 8 The water supply position shown in the image has a lower tray angle of 250 degrees that can be 8 degrees. Figure 9 The ice-making position shown in the diagram, the angle of the lower tray 250 can be -15°, in Figure 13 The ice-moving position shown in the figure indicates that the angle of the lower tray 250 can be 120°.

[0248] In detail, in the cam gear 430 Figure 18 During the rotation along the clockwise or counterclockwise direction with reference, the limiting rib 485 provided in the second housing 480 can move relative to the limiting groove 438a in the counterclockwise or clockwise direction.

[0249] The limiting rib 485 forms a predetermined length l1 in the circumferential direction (see reference). Figure 16 Therefore, it should be understood that the center angle θ1 of the limiting groove 438a is determined by taking into account the length l1 of the limiting rib 485, the rotation range of the lower tray 250, and the rotational error that may occur when the drive unit 420 is abnormally driven.

[0250] exist Figure 16 In the figure, when the limiting rib 485 is located at the "first maximum rotational position" that interferes with one end of the limiting groove 438a, it is indicated by reference numeral 485a; when the limiting rib 485 is located at the "second maximum rotational position" that interferes with the other end of the limiting groove 438a, it is indicated by reference numeral 485b.

[0251] Multiple weight-reducing grooves 438b can be provided, and the radius of curvature of any one of the multiple weight-reducing grooves 438b can be formed to be larger than the radius of curvature of another.

[0252] One side of the cam gear 430 includes a first lever cam 436 and a second lever cam 437 that transmit the rotational force of the cam gear 430 to the magnetic rod 460 and the operating lever 440.

[0253] The first lever cam 436 can protrude from the body edge portion 431b that forms the circular edge of the cam gear 430 toward the center C1 of the cam gear 430.

[0254] The length of the first lever cam 436 protruding from the edge portion 431b of the body toward the center C1 of the cam gear 430 can be changed in the circumferential direction.

[0255] The first lever cam 436 can extend in the circumferential direction. With the center C1 of the cam gear 430 as a reference, the center angle θ2 of the first lever cam 436 extending in the circumferential direction can be greater than 180° and less than 270°.

[0256] Furthermore, the second lever cam 437 can be configured to surround the lower shaft 432, and can be configured to include a first outer portion 437a and a non-constant second outer portion 437b spaced apart from the center C1 of the cam gear 430 at a constant distance.

[0257] During the rotation of the cam gear 430, the operating lever 440 can move along the surfaces of the first outer surface 437a and the second outer surface 437b of the second lever cam 437.

[0258] Figure 20 This is a diagram showing the structure of the cam surface on the back side of a cam gear according to an embodiment of the present invention. Figure 21A This is a diagram showing the state of the magnetic rod in the correct position and the error detection position. Figure 21B It shows when Figure 21A The diagram shows the state in which force is directly transmitted from the cam gear to the magnetic rod when the magnetic rod is in the error detection position. Figure 21C This is a diagram illustrating the state in which force is transmitted from the cam gear toward the magnet when the cam surface shape of the cam gear is realized according to an embodiment of the present invention.

[0259] Reference Figure 20 In one embodiment of the present invention, the cam gear 430 includes a first cam 436, and a magnetic rod 460 contacts the first cam 436.

[0260] The first cam 436 includes first to third cam portions 436a, 436b, and 436c, distinguished by bosses 436a1, 436b1, and 436c1. Each of the first to third cam portions 436a, 436b, and 436c has a contact surface that contacts the magnetic rod 460. The contact surfaces respectively provided on the first to third cam portions 436a, 436b, and 436c can be named the first to third contact surfaces.

[0261] A first groove 439a is formed between the first cam portion 436a and the body edge portion 431b. A second groove 439b is formed between the second cam portion 436b and the body edge portion 431b. Furthermore, a third groove 439c is formed between the third cam portion 436c and the body edge portion 431b.

[0262] The first boss 436a1 forms one end of the first cam portion 436a. The first cam portion 436a extends from the first boss 436a1 in the circumferential direction (with... Figure 20 Extending clockwise from the edge portion 431b of the body, the length protruding from the edge portion 431b can decrease in the clockwise direction.

[0263] The second boss 436b1 forms one end of the second cam portion 436b. The second cam portion 436b extends from the second boss 436b1 in the circumferential direction (with... Figure 20 Extending clockwise from the edge portion 431b of the body, the length protruding from the edge portion 431b can decrease in the clockwise direction.

[0264] The third boss 436c1 forms one end of the third cam portion 436c. The third cam portion 436c extends from the third boss 436c1 in the circumferential direction (with... Figure 20 Extending in a clockwise direction (based on the reference), the length protruding from the edge portion 431b of the body can decrease in a clockwise direction.

[0265] The first cam portion 436a includes a boss connecting portion 436a2 connected to the second boss 436b1. The boss connecting portion 436a2 can protrude from the body edge portion 431b toward the center C1 of the cam gear 430. Furthermore, the length (thickness) of the boss connecting portion 436a2 protruding from the body edge portion 431b toward the center C1 of the cam gear 430 can be formed to be constant in the circumferential direction.

[0266] The first length S1 is defined as the maximum length (maximum thickness) of the first boss 436a1 protruding from the edge portion 431b of the body toward the center C1 of the cam gear 430, and the second length S2 is defined as the maximum length (maximum thickness) of the second boss 436b1 protruding from the edge portion 431b of the body toward the center C1 of the cam gear 430.

[0267] The first length S1 can be made to be greater than the second length S2.

[0268] The length (thickness) of the boss connecting portion 436a2 protruding from the edge portion 431b of the body toward the center C1 of the cam gear 430 is defined as the third length S3.

[0269] The third length S3 can be formed to be smaller than the first length S1 and the second length S2.

[0270] Specifically, the third length S3 can be formed within a set ratio range relative to the second length S2. As an example, the third length S3 can have a size that is more than 30% and less than 50% of the second length S2.

[0271] Reference Figure 21A When the protruding third length S3 of the boss connection part 436a2 is too small, for example, when the third length S3 has a value less than 30% of the second length S2, the magnetic rod 460 warps or shakes with reference to the rod axis 462, and may be in the detection error position Pc.

[0272] When the magnetic rod 460 is in the correct position range A1 (the region between Pa and Pb), the Hall sensor 423 can easily detect the magnet 468 set on the magnetic rod 460.

[0273] However, when the magnetic rod 460 warps or wobbles, it may move to an incorrect detection position Pc. In this case, the Hall sensor 423 may not detect the magnet 468, potentially leading to an incorrect determination of the magnetic rod 460's position.

[0274] Furthermore, the second cam portion 436b includes a boss connecting portion connected to the third boss 436c1. The boss connecting portion of the second cam portion 436b can protrude from the body edge portion 431b toward the center C1 of the cam gear 430. The boss connecting portion of the second cam portion 436b may have the same structure as the boss connecting portion 436a2 of the first cam portion 436a. Moreover, the protruding length of the third boss 436c1 may be the same as the protruding length of the second boss 436b1.

[0275] That is, the boss connecting portion of the second cam portion 436b is connected to the third boss and has a predetermined thickness in the circumferential direction from the first boss toward the second boss. In addition, the thickness of the boss connecting portion protruding from the edge of the cam gear body toward the center is formed to be in the range of 30% to 50% of the maximum thickness S2 of the third boss.

[0276] Furthermore, the third cam portion 436c includes a boss connecting portion. The boss connecting portion of the third cam portion 436c can protrude from the edge portion 431b of the body toward the center C1 of the cam gear 430. The boss connecting portion of the third cam portion 436c can have the same shape and size as the boss connecting portion 436a2 of the first cam portion 436a and the boss connecting portion of the second cam portion 436b.

[0277] Figure 21B The magnitude and direction of the force F1 acting on the magnetic rod 460 from the cam gear 430 are shown when the third protrusion S3 of the boss connection 436a2 is equivalent to 10% of the second length S2.

[0278] When the cam gear 430 rotates, the force of the cam gear 430 pushing the magnetic rod 460 acts in the direction perpendicular to the contact surface.

[0279] When the third length S3 is equivalent to 10% of the second length S2 (in) Figure 20 In the part of the boss connection portion (excluding the shaded area), the direction of the force F1 transmitted from the cam gear 430 can be formed towards the center CL of the rod body 461 of the magnetic rod 460, or it can be formed towards the area adjacent to the rod body 461.

[0280] Therefore, F1 can act on the rod shaft 462, which may cause wobbling or warping in the assembly tolerance portion of the first housing 410 to which the rod shaft 462 is attached. In this case, the possibility of the magnetic rod 460 moving to the detection error position Pc increases.

[0281] on the contrary, Figure 21C The magnitude and direction of the force F1' acting on the magnetic rod 460 from the cam gear 430 are shown when the third protrusion S3 of the boss connection 436a2 is equivalent to 35% of the second length S2.

[0282] When the third length S3 is equivalent to 35% of the second length S2 (in) Figure 20 In the case of the boss connecting part (including the shaded part), the direction of the force F1' transmitted from the cam gear 430 can be formed as a direction separated from the center CL of the rod body 461 of the magnetic rod 460.

[0283] Therefore, F1' does not act on the rod shaft 462, thereby preventing wobbling or warping in the assembly tolerance portion of the first housing 410 to which the rod shaft 462 is attached. In this case, the likelihood of the magnetic rod 460 moving to the correct position (Pa~Pb) increases.

[0284] In summary, when the protruding third length S3 of the boss connection portion 436a2 is maintained at or above a set ratio relative to the second length S2, the force pushing the magnetic rod 460 from the cam gear 430 is formed in a preferred direction, thereby preventing abnormal movement of the magnetic rod 460 and making it easy for the Hall sensor 423 to detect the magnet 468.

[0285] Figure 22A and Figure 22B This diagram illustrates a state in which the lever shaft may warp depending on its position when no protrusion, first inclined portion, and second inclined portion are provided on the cam surface of the cam gear according to an embodiment of the present invention. Figure 23 This is a diagram illustrating a state in which a cam gear has a protrusion, a first inclined portion, and a second inclined portion on its cam surface, according to an embodiment of the present invention.

[0286] Figure 22A The position of the magnetic rod 460 relative to the cam gear 430 is shown when the lower tray 250 is in the first position. Furthermore, Figure 22B The position of the magnetic rod 460 relative to the cam gear 430 is shown when the lower tray 250 is in the second position.

[0287] Reference Figure 22A When the lower tray 250 is in the first position, the first protrusion 463 of the magnetic rod 460 can be engaged with the second protrusion 463b1. Furthermore, the second protrusion 464 can be elastically supported by the elastic member 495.

[0288] The force exerted by the restoring force of the elastic member 495 on the second protrusion 464 forms a first force Fs1 toward the outside of the cam gear 430. Furthermore, the force exerted by the second boss 463b1 on the first protrusion 463 forms a second force Fs2 acting in the opposite direction to Fs1.

[0289] Therefore, the first force Fs1 and the second force Fs2 cancel each other out, thereby preventing the rod shaft 462 of the magnetic rod 460 from warping or shaking.

[0290] Conversely, refer to Figure 22B When the lower tray 250 is in the second position, the first protrusion 463 of the magnetic rod 460 can contact the surface of the first cam portion 436a. Furthermore, the second protrusion 464 can be elastically supported by the elastic member 495.

[0291] The force exerted by the restoring force of the elastic member 495 on the second protrusion 464 forms a first force Fs1' toward the outer side of the cam gear 430. Furthermore, the force exerted by the surface of the first cam portion 436a on the first protrusion 463 forms a second force Fs2' approximately toward the center C1 of the cam gear 430.

[0292] Therefore, the first force Fs1' and the second force Fs2' act in approximately perpendicular directions, thus they do not cancel each other out. Furthermore, the second force Fs2' is directed towards the magnetic rod 460, which may cause warping or wobbling of the rod shaft 462 acting on the magnetic rod 460. As a result, this could lead to abnormal operation of the magnetic rod 460 (detection error), potentially causing the Hall sensor 423 to fail to detect the magnet 468.

[0293] That is, there is a need to provide a structure that can cause the second force Fs2' to act in the opposite direction to the first force Fs1' at the ice-making position.

[0294] Therefore, such as Figure 23 As shown, a concave-convex structure may be provided on the first cam portion 436a. This concave-convex structure can be formed on the surface of the first cam portion 436a that contacts the magnetic rod 460 when the lower tray 250 is in the ice-making position. The portion provided with the concave-convex structure is designated as the first point P1.

[0295] In detail, the concave-convex structure is provided on the surface of the first cam portion 436a and includes: a protrusion 439d; a first inclined portion 439e extending obliquely from the protrusion 439d toward the first boss 436a1; and a second inclined portion 439f extending obliquely from the protrusion 439d toward the second boss 436b1.

[0296] The first cam portion 436a extends from the first boss 436a1 toward the first inclined portion 439e with a reduced length protruding from the edge portion 431b of the body.

[0297] Furthermore, the length of the protrusion increases as it passes through the first inclined portion 439e, and reaches its maximum when it reaches the protrusion 439d.

[0298] The length of the protrusion decreases from the protrusion 439d toward the second inclined portion 439f, and can be reduced to the boss connecting portion 436a2.

[0299] The first protrusion 463 of the magnetic rod 460 can contact the first inclined portion 439e at the ice-making position. When the cam gear 430 rotates, the first inclined portion 439e pushes the first protrusion 463, thus applying a second force F2.

[0300] and Figure 22B Compared to the second force Fs2', the second force F2” acts in a direction farther away from the magnetic rod 460, thus preventing the rod shaft 462 of the magnetic rod 460 from warping or shaking.

[0301] The convex-concave structure can also be provided on the surface of the second cam portion 436b between the second boss 436b1 and the third boss 436c1. The convex-concave structure can be formed on the surface of the lower tray 250 of the second cam portion 436b that contacts the magnetic rod 460 when the lower tray 250 of the second cam portion 436b is in the full ice detection position. The portion provided with the convex-concave structure is designated as the second point P2. The description of the convex-concave structure provided in the first cam portion 436a is referenced.

[0302] The uneven structure can also be provided on the surface of the third cam portion 436c. The uneven structure can be formed on the surface of the lower tray 250 of the third cam portion 436c that contacts the magnetic rod 460 when the tray is in the ice-moving position. The portion provided with the uneven structure is designated as point P3. The description of the uneven structure refers to that provided on the first cam portion 436a.

[0303] For reference only. Figure 23 Point P4, as indicated in the text, is the part that contacts the magnetic rod 460 when the lower tray 250 is in the water supply position, including the part that forms the boss connection portion 436a2.

[0304] Figure 24 This is a partial cross-sectional view showing the state in which the magnetic rod is attached to the first housing according to an embodiment of the present invention. Figure 25 It is magnification Figure 24 The diagram in section "A".

[0305] Reference Figure 24 and Figure 25 In one embodiment of the present invention, the magnetic rod 460 can be rotatably disposed at the lower part of the first housing 410.

[0306] A shaft support portion 418 is provided on the bottom surface of the first housing 410, which is inserted into the rod shaft 462 of the magnetic rod 460. The shaft support portion 418 can be integrally formed with the first housing 410.

[0307] As an example, the shaft support 418 can be inserted into the first housing 410.

[0308] The first housing 410 and the shaft support 418 may be made of stainless steel.

[0309] The shaft support portion 418 is injection molded into the first housing 410, thereby being securely attached to the first housing 410.

[0310] During the rotation of the cam gear 430, a pressing force Fo is applied from the cam gear 430 to the magnetic rod 460, and the rod shaft 462 of the magnetic rod 460 can provide friction or torque M to the shaft support 418 through the pressing force Fo.

[0311] During this process, the shaft support 418 may be damaged when the bonding force between the shaft support 418 and the first housing 410 is weak. However, this problem can be prevented by making the first housing 410 and the shaft support 418 an integral unit.

Claims

1. An ice maker, wherein, include: The tray, placed in the storage room, forms an ice chamber; as well as The drive device moves the tray to the water supply position, the ice-making position, and the ice-moving position. The drive device is combined with the full ice detection rod. The driving device includes: Drive motor; A cam gear, which rotates by the drive motor, includes a shaft, an edge portion forming a gear portion, a first rod cam protruding from the edge portion in a circumferential direction, and a second rod cam surrounding the shaft; A magnetic rod, in contact with and movable to the first rod cam, has a magnet disposed on it. The operating lever is in contact with and movable from the second lever cam, and moves the full ice detection lever. The first lever cam includes at least three cam portions that protrude to different heights from the edge of the cam gear toward the center of the cam gear. The at least three cam portions include a first cam portion, a second cam portion, and a third cam portion, distinguished by a first boss, a second boss, and a third boss. The first cam portion is provided with a concave-convex structure including a protrusion. The concave-convex structure is disposed on the surface of the first cam portion. The concave-convex structure also includes: A first inclined portion extends inclinedly from the protrusion toward the first boss; and The second inclined portion extends obliquely from the protrusion toward the second boss.

2. The ice maker according to claim 1, wherein, The length of the first cam portion protrudes increases as it passes through the first inclined portion, reaches its maximum when it reaches the protrusion, and decreases from the protrusion toward the second inclined portion.

3. The ice maker according to claim 1, wherein, The first cam portion extends from the first boss toward the first inclined portion, and the length of the first cam portion protruding from the edge portion decreases. The length of the first cam portion protruding increases as it passes through the first inclined portion, reaches its maximum when it reaches the protrusion, and decreases from the protrusion toward the second inclined portion.

4. The ice maker according to claim 3, wherein, The first cam portion includes a boss connecting portion connected to the second boss. The length of the first cam portion protruding decreases from the protruding portion toward the boss connection portion.

5. The ice maker according to claim 1, wherein, The first inclined portion is disposed between the first boss and the protrusion, and the second inclined portion is disposed between the protrusion and the second boss.

6. The ice maker according to claim 1, wherein, A first groove is formed between the first cam portion and the edge portion.

7. The ice maker according to claim 1, wherein, The drive device further includes a reduction gear, which is disposed between the cam gear and the drive motor to reduce the rotational force of the drive motor and transmit it to the cam gear.

8. An ice maker, wherein, include: The tray, placed in the storage room, forms an ice chamber; as well as The drive device moves the tray to the water supply position, the ice-making position, and the ice-moving position. The drive device is combined with the full ice detection rod. The driving device includes: Drive motor; A cam gear, which rotates by the drive motor, includes a shaft, an edge portion forming a gear portion, a first rod cam protruding from the edge portion in a circumferential direction, and a second rod cam surrounding the shaft; A magnetic rod, in contact with and movable to the first rod cam, has a magnet disposed on it. The operating lever is in contact with and movable from the second lever cam, and moves the full ice detection lever. The first lever cam includes at least three cam portions that protrude to different heights from the edge of the cam gear toward the center of the cam gear. The at least three cam portions include a first cam portion, a second cam portion, and a third cam portion, distinguished by a first boss, a second boss, and a third boss. The first cam portion is provided with a concave-convex structure including a protrusion. The first boss forms one end of the first cam portion, the second boss forms one end of the second cam portion, and the third boss forms one end of the third cam portion. The first cam portion extends circumferentially from the first boss, and the length of the protrusion from the edge portion decreases circumferentially. The second cam portion extends circumferentially from the second boss, and the length protruding from the edge portion decreases circumferentially. The third cam portion extends from the third boss in the circumferential direction, and the length of the protrusion from the edge portion decreases in the circumferential direction.

9. An ice maker, wherein, include: The tray, placed in the storage room, forms an ice chamber; as well as The drive device moves the tray to the water supply position, the ice-making position, and the ice-moving position. The drive device is combined with the full ice detection rod. The driving device includes: Drive motor; A cam gear, which rotates by the drive motor, includes a shaft, an edge portion forming a gear portion, a first rod cam protruding from the edge portion in a circumferential direction, and a second rod cam surrounding the shaft; A magnetic rod, in contact with and movable to the first rod cam, has a magnet disposed on it. The operating lever is in contact with and movable from the second lever cam, and moves the full ice detection lever. The first lever cam includes at least three cam portions that protrude to different heights from the edge of the cam gear toward the center of the cam gear. The at least three cam portions include a first cam portion, a second cam portion, and a third cam portion, distinguished by a first boss, a second boss, and a third boss. The first cam portion is provided with a concave-convex structure including a protrusion. The first cam portion also includes a boss connecting portion connected to the second boss. The length of the protrusion of the boss connecting part from the edge towards the center of the cam gear is constant along the circumferential direction.

10. The ice maker according to claim 9, wherein, The height of the first boss is greater than the height of the second boss, and the height of the second boss is greater than the height of the boss connecting portion.

11. The ice maker according to claim 9, wherein, The height of the boss connection portion is 30% to 50% of the height of the second boss.

12. A refrigerator comprising an ice maker according to any one of claims 1 to 11.

13. The refrigerator according to claim 12, wherein, include: The box-like structure forms storage space; as well as The door opens and closes the storage space. The storage space is divided into a refrigerator compartment and a freezer compartment by partitions. The ice maker is located in the freezer compartment.

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