JPH06265249A - Ice making apparatus - Google Patents

Abstract

PURPOSE:To provide an automated ice making apparatus with a construction disposed in a refrigerator, the construction ensuring secure detection of the amount of ice in an ice storage box, and miniaturization and the low cost of the apparatus. CONSTITUTION:In an ice making apparatus including an ice making pan rotatable interlocking with the rotation of a motor 7 and an ice storage box disposed below the ice making pan, an ice detection lever 36a for detecting the amount of stored ice is actuated to detect ice upon positive rotation of the motor 7, and it is reversed and returned when there is existent ice while it is positively rotated and separated when there is existent no ice, and further it performs ice detection operation upon the reverse and return operation. Further, the apparatus includes a group of gears 9, 13, 14, 15 reduced in their speeds, interlocked with the motor 7, and detection means 45, 46 for detecting rotational positions of the ice making pan and an ice detection shaft 36, and the motor 7, and detection means 45, 46 are integrally provided on a substrate 43.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic ice making machine which is incorporated in a refrigerator or the like to make ice.

[0002]

2. Description of the Related Art Recently, it has been installed in a refrigerator to automatically supply water to an ice tray and rotate the ice tray to remove ice.
An automatic ice maker that keeps ice in an ice storage box provided below has been adopted.

For example, an ice making machine disclosed in Japanese Utility Model Publication No. 54-17137 will be described with reference to FIGS.

The ice making machine comprises an ice making machine mechanism main body 101, an ice making tray 102, an ice storage box 103 for storing ice making ice, and an ice detecting lever 104 driven by the mechanism main body 101.

The mechanical body 101 comprises a motor 105 and a reduction gear unit 106.
The final stage of is directly connected to the ice tray 102, and rotation of the ice tray and the gear unit 106 normally drives the ice detection lever 104 in the ice storage box 103. Two switch means 107 are used for detecting the rotational position of the ice tray 102 and the rotational position of the ice detecting lever 104, and the harness from the motor and the harness of the switch means 107 are arranged in the mechanical body 101.

When the ice making is completed here, the ice tray 102 is rotated by the rotation of the motor 105 to store the ice.
Ice off in 3 At this time, the ice detecting lever 104 is the ice tray 1
If there is ice, the ice detecting lever 10 is swung together with 02.
Since 4 does not return to its original state, ice is detected.

Further, in the ice making machine disclosed in Japanese Patent Laid-Open No. 2-203179, the ice storage box 1 can be operated independently without interlocking the movement of the ice detection lever with the rotation of the ice tray.
When there was no ice in 03, the ice tray was rotated to remove ice.

[0008]

All of the above inventions satisfy the use thereof, but the point to be further improved is that the ice detecting shaft of Japanese Utility Model Publication No. 54-17137 is always in the ice storage box. It is located so that the ice detecting shaft interferes with normal ice removal, and in the worst case, it may be damaged. In addition, it is possible to detect ice only after the ice tray has rotated and released ice, and it is not possible to arbitrarily perform ice detection operation when necessary. Further, it is difficult to process the harness of the switch motor, and it is difficult to reduce the size and cost of the ice maker.

In Japanese Patent Laid-Open No. 2-203179, the two points before the above problem have been solved, but the third point has not yet been solved, and furthermore, the ice detecting operation is performed only once before the ice removal. , Does not have a more reliable ice detection function.

In view of the above-mentioned problems, the present invention does not always have an ice detecting shaft in the ice storage box and can perform ice detecting only when necessary, and the ice detecting operation is always performed once before and after ice removal. The object of the present invention is to provide a small-sized and low-cost ice-making machine, which reduces the probability of false detection of ice, simplifies harness processing for switch motors, etc., has a simple mechanism and is easy to assemble.

It is another object of the invention to propose and propose a mechanism for improving and simplifying the method of driving the ice detecting shaft lever and assembling the detecting means.

[0012]

In order to solve the above-mentioned problems, the present invention is directed to a motor to rotate in the normal direction to drive an ice detecting shaft to detect the amount of ice in an ice storage box, and if there is ice, reverse return is performed. If there is no ice, the ice is further rotated in the normal direction to release the ice, and then the ice detecting operation is performed again, and then the ice is returned to the original state.

Further, in an automatic ice making machine, a motor, a reduction gear group that rotates in conjunction with the motor, a final gear having two outer peripheral cams that mesh with the gear group, and the final gear are provided. A shaft that is directly connected to an ice tray that rotates in conjunction with only a certain fixed angle, an ice detecting shaft portion that abuts the outer peripheral cam and operates a rotatable ice detecting lever, and another It is composed of a first detecting means that comes into contact with the outer peripheral cam and a second detecting means that detects the rotational position of the ice detecting lever, and the motor, the two detecting means, and an external power source are provided in the housing. It is mounted integrally on the board.Furthermore, the final gear and the shaft work together via the recesses and protrusions that mate with each other, and when the motor rotates forward, only the final gear rotates for a fixed angle, It rotates with the shaft when it rotates upward, and further has an ice detecting shaft part that is axially supported in the housing and is connected to an ice detecting lever that comes into contact with an outer peripheral cam provided in the final gear and rotates. Is.

[0014]

[Operation] The ice tray on which the ice making is completed is rotated by the motor and the reduction gear group connected to the motor.
The ice tray does not rotate and only the ice detection shaft operates to detect ice, and outputs the output by activating the detection means to detect the presence or absence of ice, and returns to the origin if there is ice, and if it does not exist, the motor further rotates forward to make ice. Rotate the plate to remove ice, and perform the ice detection operation again before the motor reverses and returns to the origin.

Here, the ice-free position is determined by the output of the detecting means, and the detecting means, the motor, and the external power source connecting line are integrally arranged on one board, so that the labor and space for harness processing are eliminated. Is.

[0016]

Embodiment An ice making machine according to an embodiment of the present invention will be described below with reference to FIG.
From now on, description will be made with reference to FIG. 7.

Reference numeral 1 denotes a box-shaped housing, and a screw hole 3 for fastening a cover 2 fitted with the housing 1 is provided at the corner top. Reference numeral 4 denotes a substantially U-shaped rib provided on the bottom surface 5 of the housing 1, into which a motor 7 as a drive source is fitted and fixed. A worm gear 9 is fitted on the shaft output shaft 8 of the motor 7, and the tip of the worm gear 9 is carried by a shaft support 10 extending from the bottom surface 5 of the housing 1.

A first gear 1 having a worm wheel portion 11 and a spur gear portion 12 at a position meshing with the worm gear 9.
3 is provided, and the second gear 1 that meshes with it is further provided.
A reduction gear group is constituted by the fourth gear 15, the third gear 15, and the like. Final gear 1 meshed with third gear 15
The reference numeral 6 includes a gear portion 17 and two outer peripheral cams 18 and 19 extending above the gear portion 17. The first outer peripheral cam 18 has the long diameter portion 1
8a, a short-diameter portion 18b, and an inclined portion 18c connecting these. The second outer peripheral cam 19 is composed of two projecting portions 22 and a circumferential portion 23 that connects them smoothly.

Further, the shaft center portions of the outer peripheral cams 18 and 19 are circular holes, and the outer circumferential edges of the circular holes are cut grooves 24 in the radial direction.
Is provided in one place. Further, the inner surfaces of the rear surfaces of the outer peripheral cams 18 and 19 have recesses 25 in two substantially quarter-circular arc portions.

Reference numeral 26 denotes a shaft, which is located below the final gear 16 and has a recess 27 at one end, which projects outward from a hole provided in the housing 1 and is connected to an ice tray (not shown), At the other end, there is a protrusion 29 having a hollow circular hole 28, and the protrusion 29 is inserted into the circular hole of the final gear 16.

A kerf 30 is also provided on the outer periphery of the protrusion 29. Further, below the protrusion 29, there is a disc portion 31 for receiving the final gear 16 in the axial direction, and two convex portions 32 extend upward along the outer circumference of the disc portion 31.

The convex portion 32 is provided on the inner side of the final gear 16.
The convex portion 3 is loosely fitted with the substantially quarter arc-shaped concave portion 25 of the location.
2 is formed in an arc shape having an angle smaller than that of the recess 25. A coil spring 33 has a wire extending in the radial direction at each end. The coil spring 33 is housed in the circular hole of the final gear 16 and has one end 3
4 is locked in the kerf 24, and the other end 35 is locked in the kerf 30 of the projection 29 of the shaft 26 which is inserted through the inner diameter of the coil spring 33.

Therefore, the shaft 26 is biased in the reverse direction of the motor 27, and when the motor 7 rotates in the normal direction, the final gear 16 rotates only for a certain angle, but the shaft 26 does not rotate for a certain angle. After passing, the end of the concave portion 25 inside the final gear 16 and the convex portion 3 of the shaft 26
The two come into contact with each other and rotate together.

Reference numeral 36 denotes an ice detecting shaft for driving the ice detecting lever 36a, which has shaft portions 37 at both ends thereof, and a central portion 38 which is raised in a substantially U shape, and a bearing portion 39 provided in the housing 1. It is rotatably held by. Ice detection lever 36
The one end of the ice detecting shaft 36 on the side joined to a is the housing 1
Has a sidewall protruding from the U-shaped cutout portion to the outside.

A projection 40 and a tongue-shaped projection 41 having an inclined portion are formed in the central portion 38 of the ice detecting shaft 36, and the projection 40 is formed on the first outer peripheral cam 18 of the final gear 16.
It comes in contact with. Here, the ice detecting shaft 36 is biased by a bias spring 42 so as to be constantly pressed against the outer circumference of the cam.

Reference numeral 43 denotes a substrate, which is a groove 44 of the housing 1.
It is fitted into the cover 2 and is pressed and fixed to the cover 2. The substrate 43 has a first detection means 45 and a second detection means 4 such as a micro switch.
6 is directly attached, and the operating piece of the first detecting means 45 is the protrusion 2 of the second outer peripheral cam 19 of the final gear 16.
The second detection means 4 is in a position where it is turned on and off by 2.
The operating piece 6 is located at a position where it is inserted and cut by the tongue-like projection 41 of the ice detecting shaft 36.

The amount of ice storage is judged to be insufficient when the first detecting means 45 is in the off state, and when the ice detecting shaft 36 rotates by a predetermined amount or more and the second detecting means 46 is in the on state. . Then, when the first detection means 45 is in the off state,
Moreover, the ice detecting shaft 36 does not rotate by a predetermined amount or more, and the second detecting means 4 does not rotate.
When 6 is in the off state, it is determined that there is ice storage.

When the outer peripheral cam 18 is rotated by rotating the motor 7 in the normal direction, the protruding portion 40 of the ice detecting shaft 36 is formed on the outer peripheral cam 18 into a long diameter portion 18a → a slant portion 18c → a short diameter portion 18b → a slant portion. 18c →
By contacting the long diameter portion 18a in this order, the ice detecting shaft 36
Is rotated to lower and raise the ice detecting lever 36a, and at the same time, the ice tray is rotated to the ice removing angle. This series of drive is referred to as first drive means.

While the motor 7 is rotated in the reverse direction and the ice tray is returned to the origin, the outer peripheral cam is simultaneously rotated in the reverse direction so that the protruding portion 40 of the ice detecting shaft 36 on the outer peripheral cam 18 has the long diameter portion 18a → the slant portion 18c.
The short-diameter portion 18b, the slanted portion 18c, and the long-diameter portion 18a are brought into contact in this order to rotate the ice detecting shaft 36, and the ice detecting lever-3.
6a is lowered and raised. This series of drive is referred to as second drive means.

When the outer peripheral cam 18 is rotated by rotating the motor 7 in the normal direction, the projection 40 of the ice detecting shaft 36 is brought into contact with the long diameter portion 18a → the slanted portion 18c → the short diameter portion 18b on the outer periphery cam. Thus, the ice detecting shaft 36 is rotated to lower the ice detecting lever 36a. When the ice detecting lever does not descend below a predetermined position and the motor is rotated in reverse and the outer peripheral cam is rotated in reverse, the projection 40 of the ice detecting shaft 36 is placed on the outer peripheral cam so that the short diameter portion 18b → the slanted portion 18c →
By contacting the long diameter portion 18a in this order, the ice detecting shaft 36
Is rotated to raise the ice detecting lever 36a. This series of drive is referred to as a third drive means.

Further, on the board 43, a connector 49 for processing the harness 48 of the motor 7, a test switch (not shown) for confirming the test operation of the ice making machine, and a connector 50 for connecting to an external power source are integrally arranged. ing.

The operation of the automatic ice making machine configured as described above will be described. When the water supplied by a pump (not shown) to an ice making tray (not shown) freezes and the thermistor, which is an ice making detecting means, detects that the temperature is below the set temperature and the ice making is completed, the control board (Fig. A signal is input from (not shown) to rotate the motor 7 in the normal direction. When the motor 7 rotates forward,
Worm gear 9, first, second and third gears 13, 14,
15 is sequentially rotated and decelerated, and the rotation is transmitted to the final gear 16.

When the final gear 16 starts to rotate, first, the long diameter portion 1 of the first outer peripheral cam 18 of the final gear 16 is rotated.
The protruding portion 40 of the ice detecting shaft 36 that was in contact with 8a moves from the long diameter portion 18a to the short diameter portion 18b via the slant portion 18c. In conjunction with this, the ice detecting shaft 36 rotates, and the ice detecting lever 36a descends into the ice storage box provided under the ice making machine. At this time, if ice is not stored in the ice storage box, the ice detecting lever 36a descends to the lowest point, and the protrusion 40 of the ice detecting shaft 36 reaches the short diameter portion 18b of the first outer peripheral cam 18.

On the contrary, if there is ice in the ice storage box, the ice detecting lever 3
6a does not descend to the lowest point and stops midway, so that the protruding portion 40 of the ice detecting shaft 36 is maintained in a floating state without reaching the short diameter portion 18b from the slant portion 18c of the first outer peripheral cam 18. . At this time, the second detection means 46 that operates by contacting the tongue-shaped projection 41 of the ice detecting shaft 36 turns on and off according to the rotation angle of the ice detecting shaft 36, and as a result, determines by the amount of ice storage. Will give a signal. Here, if there is ice in the ice storage box, the motor 7 is turned over and returned to the origin (the ice tray is in the horizontal position) and stands by.

Here, the position of the origin is the final gear 16
The determination is made based on the switching state of the first detection means 45 and the switching state of the second detection means 46 that operate in contact with the second outer peripheral cam 19.

If there is no ice in the ice storage box, the motor 7 rotates normally and the final gear 16 continues to rotate.
The convex portion 29 comes into contact with the shaft 26 and the shaft 26 starts rotating, and the ice tray (not shown) also starts rotating. Here, the ice detecting shaft 36 again reaches the first outer peripheral cam 18a of the final gear 16, and pulls up the ice detecting lever 36a from the inside of the ice storage box. As long as the normal rotation of the motor continues, the long diameter portion 18a
Will be in contact with.

When an ice tray (not shown) is twisted by a certain angle or more and is rotated to a position where the ice inside is released, the first protrusion 22 of the second outer peripheral cam 19 of the final gear 16 causes the first ice to rotate. The detection means 45 is switched, the motor 7 starts reverse rotation, the ice tray returns to the original position, and the preparation for the next ice making operation is completed.

Here, before returning to the origin, the ice detecting shaft 36 again performs an ice detecting operation to check again the amount of ice in the ice storage box. Therefore, an external power source (not shown) is connected via the connector 50, and a test switch (not shown) for confirming the operation of the ice making machine is provided with a drip-proof structure at a position where the operation can be confirmed from the outside.

As described above, in the automatic ice making machine according to the embodiment of the present invention, the motor 7, the worm gear 9 meshing with the motor 7, the first gear 13, the second gear 1 are provided in the angular housing 1.
The speed is reduced by the fourth and third gears 15 and 2
It engages with a final gear 16 having two outer peripheral cams 18, 19, and a shaft 26 connected to an ice tray is provided below the axial line of the final gear 16 and the shaft 2
Reference numeral 6 denotes a convex portion 32 that meshes with the quarter-circular arc-shaped concave portion 25 provided on the final gear 16.
At 3, the shaft 26 is biased in the reverse direction of the motor 7 and is rotatably supported by the housing 1.
Moreover, the bias spring 42 contacts the first outer peripheral cam 18 of the final gear 16 and rotates to drive the ice detecting lever 36a, and the tongue-shaped portion 4 provided on the ice detecting shaft 36.
The second detection means 46 that is turned on and off at 1, the first detection means 45 that is turned on and off at the second outer peripheral cam 19, and the wiring to the motor 7 and the connection of the external connection line are integrated. Since it is provided on the substrate 43, (1) the rotation direction of the motor 7 is the forward rotation, the ice is once detected before the ice is removed, and the ice is detected again before returning to the origin after the ice is removed.
The possibility of false detection of the amount of ice is small and reliable ice detection is possible. (2) The harness processing of the motor 7, the first and second detecting means 45, 46 and the external connection line is simplified, which contributes to downsizing and cost reduction of the ice making machine. (3) The shaft 26 and the final gear 16 are connected by a simple mechanism, which contributes to simplification of the mechanism and cost reduction. (4) Since the ice detecting shaft 36 is driven only by the outer peripheral cam 18, the assembly is simple, the size is small, and the space is saved.

In this embodiment, the outer peripheral cams 18 and 19 are provided with a concave portion 25 inside and the disc portion 31 of the shaft 26 is provided with a convex portion 3.
Although No. 2 is provided, the same effect can be obtained even if the unevenness is reversed. The same applies when the recesses provided inside the outer peripheral cams 18 and 19 are provided inside the final gear.

[0041]

As described above, in the series of ice making cycles of the present invention, the motor rotates in the forward direction, the ice detecting shaft is first operated, the amount of ice in the ice storage is detected, and if there is ice, it is reversed. If there is no ice after returning to the origin, the motor further rotates in the normal direction, and after ice removal, the ice detection operation is performed again and returns to the origin, which increases the certainty of detection of ice detection and enables accurate ice detection.

Further, since the ice storage amount detecting means of the ice detecting shaft, the ice releasing position detecting means of the ice tray, the origin position detecting means, and the wiring and mounting of the motor external connection line are collectively provided on one board, The number of man-hours is small, the processing of harness for occupying a space is easy, the size is small and the cost is low, and the effective internal volume of the refrigerator is not significantly reduced even when the refrigerator is used in a small capacity.

The shaft directly connected to the ice tray is
It is arranged below the final gear, and it does not rotate even if the final gear rotates only at a certain angle when the motor rotates forward, and when the final gear rotates more than a certain angle, the final gear concave portion and the shaft convex portion come into contact with each other. It has a rotating structure. Since these functions by the contact of the concave portion of the final gear and the convex portion of the shaft, they are achieved with a simple configuration.

Further, since the ice detecting shaft is driven only by the rotatably supported ice detecting shaft contacting the outer peripheral cam of the final gear and rotating, the assembly is easy and the reliability is high. It is a thing.

As described above, the ice making machine of the present invention is practically useful.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an ice making machine according to an embodiment of the present invention.

FIG. 2 is an assembly diagram with the cover of FIG. 1 removed.

FIG. 3 is a plan view with the cover of FIG. 1 removed.

4 is a sectional view of FIG.

5 is an enlarged view of a main part of FIG.

FIG. 6 is a block diagram showing operation modes of the ice making machine of the present invention.

FIG. 7 is a flowchart showing the operation of the ice making machine of the present invention.

FIG. 8 is an overall configuration diagram of a conventional ice making machine.

9 is a schematic diagram of the inside of the mechanical section of the ice maker shown in FIG.

[Explanation of symbols]

 1 Housing 7 Motor 9, 13, 14, 15 Reduction Gear Group 16 Final Gear 18, 19 Two Outer Cams of Final Gear 26 Shaft 36 Ice Detecting Axis 45 First Detecting Means 46 Second Detecting Means 25 Approximately Quadrant Arc Recessed portion 43 substrate 32 shaft convex portion 33 spring member (coil spring) 18a outer peripheral cam long diameter portion 18b outer peripheral cam short diameter portion 18c outer peripheral cam slant portion 41 tongue-shaped protrusion of the ice detecting shaft

Claims (9)

[Claims] 1. An ice tray, an ice making detector for detecting the completion of ice making, a motor for rotating the ice tray about a point where the ice tray is horizontal, and a motor for reversing the motor. The ice detecting shaft that rotates in conjunction with it, and the ice detecting lever that stops in the raised position during standby and rotates in conjunction with the rotation of the ice detecting shaft.
And an ice storage box for determining the presence or absence of the ice storage amount by detecting the rotation state of the ice detection lever, and the ice detection lever is below a predetermined position when the motor is rotated in the forward direction. When descending,
The first drive means for continuing the normal rotation of the water to raise the ice detecting lever and rotating the ice tray to the ice removing angle, and after releasing the ice, reverse the motor and return the ice tray to the origin. Second drive means for rotating the ice detecting lever, and when the ice detecting lever does not descend below a predetermined position when the motor is normally rotated, the motor is reversed to wait for the ice detecting lever. And a third drive means for raising the position of the ice machine. 2. An ice tray, a motor for rotating the ice tray with the horizontal point of the ice tray as an origin, an ice detection lever that rotates in conjunction with forward and reverse rotation of the motor, and an ice detector. Determination means for determining the presence or absence of the ice storage amount by detecting the rotating state of the lever,
In an ice machine equipped with an ice storage, the ice detection lever is rotated before the ice in the ice tray is released, and after the ice is released, the ice detection lever is also rotated to store the ice storage amount in the ice storage. Ice machine characterized by detecting the presence or absence of. 3. A housing, a motor, a reduction gear group that rotates in conjunction with the motor, a final gear that meshes with the gear group, and a plurality of outer peripheral cams provided coaxially with the final gear. A shaft that interlocks with the final gear only at a certain rotation angle, an ice tray that is rotatably held in conjunction with the shaft, and pivots by contacting one of the outer peripheral cams of the final gear and pivoting. And an ice detecting shaft portion for detecting the amount of ice in an ice storage box provided below the second ice detecting box, and abutting against a part of the ice detecting shaft to detect a rotation angle of the ice detecting shaft.
And a first detecting means for contacting another outer peripheral cam of the final gear to detect an ice-breaking position and an inversion return position of an ice tray, and a connection to a motor and an external connection line. An ice-making machine, characterized in that the above is integrally arranged on a substrate installed inside the housing. 4. A housing, a motor, a reduction gear group that rotates in conjunction with the motor, a final gear that meshes with the gear group, and a plurality of outer peripheral cams provided coaxially with the final gear. A shaft that interlocks with the final gear only at a certain rotation angle, an ice tray that interlocks with the shaft and is rotatably held, and an ice tray that rotates by abutting on one of the outer peripheral cams of the final gear. An ice detecting shaft portion provided below the ice detecting box for detecting the amount of ice, a second detecting means for contacting a part of the ice detecting shaft to detect a rotation angle of the ice detecting shaft, and the final detecting unit. A first detecting means for contacting with another outer peripheral cam of the gear to detect an ice-breaking position and an inversion-returning position of the ice tray; and a connection to a motor and an external connecting wire and the first detecting means The second detection means is installed inside the housing. The ice making machine according to claim 1, further comprising: a substrate integrally provided on the placed substrate. 5. A final gear, a plurality of outer peripheral cams formed by extending in the axial direction of the final gear, a concave portion or a convex portion formed on the back surface side of the final gear or the outer peripheral cam, and inserted into the final gear. A shaft, a convex portion or a concave portion formed coaxially with the shaft and loosely fitted to the concave portion or the convex portion, a final gear and a spring member biased in the motor reversing direction, and are constant during normal rotation of the motor. The ice machine is characterized in that only the final gear rotates within an angle, the shaft rotates together with the final gear above a certain angle, and after the ice is removed, the final gear and the shaft are interlocked and returned by reversing the motor. 6. A final gear, a plurality of outer peripheral cams formed by extending in the axial direction of the final gear, a concave portion or a convex portion formed on the back surface side of the final gear or the outer peripheral cam, and inserted into the final gear. A shaft, a convex portion or a concave portion formed coaxially with the shaft and loosely fitted to the concave portion or the convex portion, a final gear and a spring member biased in the motor reversing direction, and are constant during normal rotation of the motor. The final gear rotates only within an angle, and the shaft rotates together with the final gear above a certain angle, and after the ice is released, the final gear and the shaft are interlocked and returned together. The ice making machine according to claim 3 or claim 4. 7. A final gear, two outer peripheral cams formed by extending in the axial direction of the final gear, a semicircular arc-shaped recess formed on the final gear or the rear surface side of the outer peripheral cam, and the final gear. It has a shaft to be inserted, a convex portion formed coaxially with the shaft and having a smaller arc angle than the concave portion of the final gear, and a spring member that biases the final gear and the motor reversing direction, and is constant during normal rotation of the motor. The ice making machine is characterized in that only the final gear rotates within an angle, the shaft rotates together with the final gear above a certain angle, and after the ice is released, the final gear and the shaft are interlocked and returned by reversing the motor. 8. A final gear, two outer peripheral cams formed by extending in the axial direction of the final gear, a semi-arcuate recess formed on the final gear or the rear surface side of the outer peripheral cam, and the final gear. It has a shaft to be inserted, a convex portion formed coaxially with the shaft and having a smaller arc angle than the concave portion of the final gear, and a spring member that biases the final gear and the motor reversing direction, and is constant during normal rotation of the motor. The final gear rotates only within an angle, the shaft rotates together with the final gear at a certain angle or more, and the final gear and the shaft return in conjunction with each other by reversing the motor after ice-freezing. Item 3
Alternatively, the ice making machine according to claim 4. 9. One of the two outer peripheral cams of the final gear has a convex portion for actuating the first detecting means mounted on the substrate, and the other outer peripheral cam has a long diameter portion and a short diameter portion. The ice detecting shaft, which is rotatably supported by the housing, is composed of a slanted portion connecting the above and both ends of the ice detecting shaft, and the central portion thereof rises from the shaft supporting portion and abuts against the outer peripheral cam of the final gear. 9. A projection part for activating the second detection means provided on the upper part, claim 1, claim 3, claim 4, claim 5, claim 6, claim 7, or claim 8. Ice machine.