JP2011214669A - Cam power transmission mechanism and ice-making device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose an ice-making device on which a compact cam power transmission mechanism is mounted.SOLUTION: This cam drive force transmission mechanism 29 includes a cam gear 21 to which a scraping-out member 4 is attached, a shaft member 23 driven along the first cam face 41 of the cam gear 21, a switch lever 26 driven along the second cam face 44 of the cam gear 21, and a switch 25 operated by the switch lever 26. A lever 10 for detecting ice amount is attached to the shaft member 23. The shaft member 23, the switch lever 26, and the switch 25 are arranged in the direction of the swing center line L2 of the shaft member. The body part 232 of the shaft member 23 and the shaft part 261 of the switch lever 26 form a predetermined angle. Consequently, the cam drive force transmission mechanism 29 is disposed in a restricted space both in the direction of the rotating center line L1 and the direction perpendicular to the rotating center line L1.

Description

  The present invention relates to a cam-type power transmission mechanism having a cam mechanism having a cam surface formed on an end surface of a rotating shaft and a cam mechanism having two cam followers protruding radially from a swing shaft. In addition, such a cam-type power transmission mechanism, a scraping member that scrapes ice from the ice tray, an ice amount detection lever for confirming the ice amount in the ice storage unit, and a driven for obtaining a signal for confirming the ice amount The present invention relates to an ice making device that operates members.

  The rotational force of the motor is transmitted through a cam-type power transmission mechanism to operate an ice amount detection lever for detecting the ice amount of the ice storage unit and a driven member for obtaining an ice amount confirmation signal. An ice making device is described in Patent Document 1. The cam-type power transmission mechanism includes a rotating motion of a rotating shaft such as a cam gear rotated by a motor, a swinging motion of a shaft-like member that drives an ice amount detection lever via the cam mechanism, and a driven member. The cam mechanism has a cam surface formed on the circular end surface of the rotating shaft and two cam followers protruding from the rocking shaft. Is used.

JP 2001-304733 A

  The components of the cam-type power transmission mechanism must be arranged so as not to interfere with each other at a portion adjacent to the end surface where the cam surface is formed on the rotating shaft. For this reason, a large installation space is required in the direction orthogonal to the end surface of the rotating shaft and in the direction parallel to the end surface.

  In view of such a point, the present invention is to provide a cam-type power transmission mechanism that can be arranged compactly in a narrow space. In addition, the cam-type power transmission mechanism is used to detect the position of the scraping member that scrapes ice from the ice tray, the ice amount detection lever that checks the ice amount in the ice storage section, and the ice amount detection lever. It is an object of the present invention to provide an ice making device that drives a driven member for obtaining a signal to be transmitted.

In order to solve the above problems, the cam-type power transmission mechanism of the present invention includes:
A rotation axis;
A first swing shaft that faces the one end face in the direction of the axis of the rotary shaft in parallel and drives the first driven member;
A second swinging shaft that faces the end face in parallel and drives the second driven member;
The rotating shaft includes a first cam surface formed to face inward or outward in the radial direction, and the first swing shaft includes a first cam follower that contacts the first cam surface, A first conversion mechanism in which the first cam follower slides on the first cam surface and converts the rotational motion of the rotary shaft into a swing motion around the axis of the first swing shaft;
The rotating shaft includes a second cam surface formed to face inward or outward in the radial direction, and the second swing shaft includes a second cam follower that contacts the second cam surface, A second conversion mechanism in which the second cam follower slides on the second cam surface and converts the rotational motion of the rotary shaft into a swing motion around the axis of the second swing shaft;
The second swing shaft has an operation lever for driving the second driven member,
The second driven member is disposed at a position offset in the axial direction of the first swing shaft with respect to the other end side of the first swing shaft to which the first driven member is coupled at one end. It is characterized by.

  According to the present invention, the first swing shaft and the second swing shaft face each other in parallel with the end surface of the rotation shaft, so that the first swing shaft and the second swing shaft are connected to the end surface of the rotation shaft. It can be placed in a narrow space nearby. The second driven member is disposed at a position offset in the axial direction of the first swing shaft with respect to the other end side of the first swing shaft to which the first driven member is connected at one end. The second driven member can be arranged at a position different in the axial direction of the first swing shaft and overlapping with the axis of the first swing shaft. Therefore, the first swing shaft and the second driven member can be arranged together in a narrow space in a direction orthogonal to the axial direction of the first swing shaft. Therefore, the space efficiency for arranging other components such as a train wheel is improved, and as a result, the apparatus can be downsized. Here, the position offset in the axial direction of the first swing shaft with respect to the other end side of the first swing shaft is a position different in the axial direction of the first swing shaft, and is the first swing shaft. When viewed from the axial direction, the position overlaps the first swing axis.

  In the present invention, the first slidable contact position where the first cam follower is slidably contacted with the first cam surface and the second slidable contact position where the second cam follower is slidably contacted with the second cam surface are the rotation axis. It is desirable that the angle is within an angle range of 90 ° around the axis. In this way, since the first sliding position and the second sliding position are close to each other, the first swing shaft and the second swing shaft can be disposed close to each other. Therefore, the second swing shafts can be arranged together in a narrow space in a direction orthogonal to the axial direction of the first swing shaft. Therefore, the space efficiency for arranging other components such as a train wheel is improved, and as a result, the apparatus can be downsized.

  In the present invention, the first cam surface is formed on an inner peripheral surface of a first recess formed on the end surface of the rotating shaft, and the second cam surface is formed on the end surface of the rotating shaft. 2 is formed on the inner peripheral surface of the recess, and the second swing shaft is offset with respect to the first swing shaft in the axial direction of the first swing shaft, and the first swing shaft The first swing shaft, the second swing shaft, and the second driven member are disposed between the swing shaft and the second driven member, and the direction orthogonal to the end surface of the rotation shaft. When viewed from the above, it is desirable that the rotary shaft is disposed within the range of the diameter of the rotary shaft in a direction orthogonal to the axial direction of the first swing shaft. In this case, the first swing shaft, the second swing shaft, and the second driven member are orthogonal to the axial direction of the first swing shaft when viewed from the direction orthogonal to the end surface of the rotation shaft. Since the first oscillating shaft, the second oscillating shaft and the second driven member are narrow in the direction perpendicular to the axial direction of the first oscillating shaft Can be placed in a space.

  In this invention, it has a case provided with the opposing board part facing the said end surface of the said rotating shaft, The said case is provided with the protrusion part for bearings which protrudes in the said rotating shaft side from the said opposing board part. The bearing protrusion includes a first bearing that rotatably supports an end portion of the first swing shaft on the second swing shaft side, and one end of the second swing shaft. A second bearing is formed to support the portion so as to be swingable, and the axis of the first swing shaft and the axis of the second swing shaft have the same distance from the end surface of the rotary shaft. The first bearing is either one of a convex part and a concave part formed on the bearing projection part, and the second bearing is either one of the convex part and the concave part formed on the bearing projection part. Or the other. In this way, it is possible to configure a bearing portion that supports each of the first swing shaft and the second swing shaft so as to be swingable at a position close to one bearing protrusion provided on the case. Therefore, the first swing shaft and the second swing shaft can be arranged close to each other.

  In the present invention, in order to link the operation of the driven member by the second swing shaft with the swing of the first swing shaft, the first swing shaft has a predetermined rotation around the axis of the first swing shaft. It is desirable to have a linkage mechanism that restricts the swing of the second swing shaft and prevents the operation of the driven member when positioned at an angle.

  In this case, the cooperation mechanism protrudes from an outer peripheral surface of the body portion of the first oscillating shaft and a cooperating member supported so as to oscillate around a oscillating center line orthogonal to the axis of the rotating shaft. And a regulating protrusion that faces the side of the linkage member when the first oscillation shaft is positioned at a predetermined angle around the axis of the first oscillation shaft, The first swingable shaft can be brought into contact with the restricting protrusion when the first swing shaft is positioned at a predetermined angle around the axis of the first swing shaft on one side of the swing center line. A second contact portion that can contact the operation lever on the other side; and when the first contact portion contacts the restricting projection, the link member moves the swinging portion. The second abutting portion swings around the moving center line and interferes with the operation lever, and the operation of the driven member by the second swing shaft is prevented. It can be configured to.

  Further, in this case, the linkage member includes a through hole that intersects the swing center line between the first contact portion and the second contact portion, and the bearing member is provided in the through hole. It is desirable that the protrusion is supported in a swingable manner in the inserted state. In this way, since the linkage member can be disposed close to the first swing shaft and the second swing shaft, the connecting member can be reduced in size.

  In this case, the bearing projection has a tip portion passing through the through hole and positioned on the rotating shaft side with respect to the cooperation member, and the first bearing and the second bearing are placed on the tip portion. It is desirable to have it. If it does in this way, a connection member, the 1st swinging shaft, and the 2nd swinging shaft can be arranged near. In addition, when the bearing that supports the coupling member in a swingable manner, the first bearing of the first swinging shaft, and the second bearing of the second swinging shaft are separately formed into two members, these connecting members The workability when incorporating the three members, the first swing shaft and the second swing shaft, is poor, but according to such a configuration, the connecting member is swingably supported by the case which is one member. Since the bearing, the first bearing of the first oscillating shaft, and the second bearing shaft of the second oscillating shaft are formed, workability when incorporating these three members is improved.

  In this case, it is preferable that the outer peripheral surface portion of the bearing projection is a guide portion that abuts the inner peripheral surface of the through hole and guides the swing of the cooperation member. If it does in this way, when the 1st contact part contacts the projection for regulation, the 2nd contact part can be made to interfere with an operation lever certainly.

  In this case, it is desirable that the link member has a continuous periphery of the through hole. If it does in this way, the rigidity of a connecting member can be raised.

Next, the ice making device of the present invention is
An ice tray,
A scraping member that scrapes ice from the ice tray and moves it to an ice storage unit;
An ice amount detection lever that is capable of contacting the ice in the ice storage unit and is driven to swing toward the ice storage unit in order to detect the ice amount of the ice storage unit;
A switch for obtaining a signal for checking the amount of ice,
Having the above-mentioned cam type power transmission mechanism,
The scraping member is attached to the rotating shaft so as to rotate integrally,
The first driven member is the ice amount detection lever;
The second driven member is the switch, and is switched on and off by being operated by the operation lever.

  In this case, it is preferable that the ice amount detection lever is connected to one end of the first swing shaft, and the switch is disposed on the other end side of the first swing shaft.

  According to the present invention, the first swing shaft and the second swing shaft face each other in parallel with the end surface of the rotation shaft, so that the first swing shaft and the second swing shaft are connected to the end surface of the rotation shaft. It can be placed in a narrow space nearby. The second driven member is disposed at a position offset in the axial direction of the first swing shaft, and the second swing shaft moves the operation lever for driving the second driven member to the second swing shaft. Since it protrudes from the moving shaft between the end face and the driven member, the second swing shaft can be arranged in the axial direction of the first swing shaft. Therefore, the first oscillating shaft, the second oscillating shaft, and the driven member can be arranged in a narrow space in a direction parallel to the end surface of the rotating shaft and perpendicular to the axial direction of the first oscillating shaft.

It is a perspective view which shows the ice making apparatus to which this invention is applied. It is a side view of the drive unit which removed the outer case. It is the side view which looked at the drive unit which removed the inner case from the ice tray side. FIG. 4 is a side view of the drive unit showing a state where the cam gear is removed in FIG. 3. It is the side view which looked at the upper case from the inside. (A) is a side view of a cam gear, a shaft-shaped member, a switch lever, a switch, and a cooperation member, (b) is the top view. It is a disassembled perspective view of a cam gearwheel, a shaft-shaped member, a switch lever, a switch, and a cooperation member. It is the end view which looked at the cam gearwheel from the non-output side. It is a flowchart which shows the ice making operation | movement of an ice making apparatus. (A) is a cam chart showing the initialization operation, (b) is a cam chart showing the operation when the ice amount is insufficient, (c) is a cam chart showing the operation when the ice storage part is full, ( d) is a cam chart showing the rotation operation of the ice detecting shaft.

  Hereinafter, an ice making device to which the present invention is applied will be described with reference to the drawings.

(overall structure)
FIG. 1 is a perspective view showing an ice making device to which the present invention is applied. The ice making device 1 continuously manufactures ice in a refrigerator or a freezer, and stores the manufactured ice by dropping it in an ice storage unit 2 disposed below.

  The ice making device 1 includes an ice making tray 3 for producing ice. On the upper side of the ice tray 3, a scraping member 4 for scraping out the ice produced in the ice tray 3 from the ice tray 3 is arranged, and on the front side of the scraping member 4, the ice scraped from the ice tray 3. An ice sliding guide member 5 for sliding the ice into the ice storage unit 2 is disposed. The scraping member 4 includes a rotating shaft 6 and a plurality of scraping claws 7 projecting radially from the rotating shaft 6, and the scraping member 4 is driven to rotate clockwise (CW direction) about the rotating shaft 6. Then, the scraping claw 7 scrapes out the ice produced in the ice making cell 8 partitioned in the ice tray 3 and places it on the upper surface of the ice sliding guide member 5. The ice placed on the ice sliding guide member 5 slides forward along the ice sliding guide member 5 and falls to the ice storage unit 2.

  A drive unit 9 is disposed at the left end portion of the ice tray 3 in the apparatus width direction. On the lower side in front of the ice tray 3 and the drive unit 9 is an ice amount detection lever (first driven member) 10 that is driven to swing up and down in order to check the ice amount of the ice storage unit 2. Has been. The ice amount detection lever 10 can come into contact with the ice in the ice storage unit 2 by swinging in the vertical direction about the mounting portion 10 a attached to the drive unit 9.

  The drive unit 9 includes a device case 11 having a rectangular parallelepiped shape as a whole. The device case 11 includes an outer case 12 disposed on the left side in the device width direction and an inner case 13 disposed on the right side where the ice tray 3 is located. The drive unit 9 constitutes an ice moving mechanism that moves the ice produced together with the scraping member 4 from the ice tray 3 to the ice storage unit 2. In addition, the drive unit 9 constitutes an ice amount confirmation mechanism for confirming the ice amount in the ice storage unit 2 together with the ice amount detection lever 10.

  Ice making water is supplied to the ice tray 3 from a water supply mechanism (not shown), whereby ice is manufactured in the ice tray 3. When the ice is manufactured, the drive unit 9 performs an ice scraping operation for rotationally driving the scraping member 4, whereby the ice is scraped from the ice tray 3 and dropped to the ice storage unit 2. Further, the drive unit 9 performs an ice amount confirmation operation in which the ice amount detection lever 10 is swung downward in synchronization with the ice scraping operation, whereby a predetermined amount of ice is stored in the ice storage unit 2. Check if it is.

  When it is confirmed that a predetermined amount of ice is not stored in the ice storage unit 2 by the ice amount confirmation operation performed in parallel with the ice scraping operation, that is, the ice storage unit 2 is not full, the drive unit 9 By the ice scraping operation, the scraping member 4 is rotated once from the ice making position where the scraping claw 7 is located above the ice tray 3. As a result, the ice is scraped from the ice tray 3, slides down the falling ice guide member, and moves to the ice storage unit 2.

  On the other hand, when the scraping member 4 starts to rotate clockwise once, it is confirmed that a predetermined amount of ice is stored in the ice storage unit 2 by the ice amount confirmation operation, that is, the ice storage unit 2 is full. In order to prevent the ice moved from the ice tray 3 from overflowing from the ice storage unit 2, the drive unit 9 stops the ice scraping operation and resets the ice scraping operation. That is, before the scraping member 4 is inserted into the ice making cell 8, the scraping member 4 is rotated counterclockwise to return to the ice making position 4A.

  When the ice scraping operation is reset, the drive unit 9 starts the ice scraping operation again after a predetermined time has elapsed. In addition, an ice amount confirmation operation is performed in synchronization with the ice scraping operation.

  In the ice scraping operation again, when it is confirmed that the ice storage unit 2 is not full, the ice moving mechanism rotates the scraping member 4 once by the ice scraping operation to move the ice to the ice storage unit 2. When it is confirmed that the ice storage unit 2 is full, the ice scraping operation is stopped. Thereafter, the scraping member 4 is rotated counterclockwise to return to the origin position, and the ice scraping operation is reset. Then, after the predetermined time has elapsed, the above operation is repeated again.

(Drive unit)
FIG. 2 is a side view of the drive unit 9 with the outer case 12 removed as viewed from the left side in the apparatus width direction. FIG. 3 is a side view of the drive unit 9 with the inner case 13 removed as viewed from the right side in the apparatus width direction. FIG. 4 is a side view of the drive unit 9 with the cam gear removed in FIG. FIG. 5 is a side view of the upper case as viewed from the inside. The drive unit 9 includes a motor 20 as a drive source for the scraping member 4 and the ice amount detection lever 10, a cam gear (rotary shaft) 21 connected so that the scraping member 4 rotates integrally, and the motor 20. Is provided with a reduction gear train 22 that transmits the rotational output of

  Further, the drive unit 9 is driven by a cam gear 21 to swing the ice amount detection lever 10 in the vertical direction, and a torsion coil spring that biases the shaft member 23 in one swinging direction. 24, a switch (second driven member) 25 for outputting a signal when the ice in the ice storage unit 2 is full, a switch lever 26 that operates the switch 25 following the cam gear 21, and a switch lever 26 Is provided with a compression coil spring 27 (see FIGS. 3 and 4). Moreover, the cooperation member 28 for making the shaft-shaped member 23 and the switch lever 26 cooperate is provided. Here, the cam gear 21, the shaft-shaped member 23, the switch 25 and the switch lever 26 constitute a cam type power transmission mechanism 29.

(Motor and reduction gear train)
The motor 20 is a DC motor, and an output shaft extends toward the right side (ice tray 3 side) in the apparatus width direction. The reduction gear train 22 includes a pinion 30 attached to the output shaft of the motor 20, a first compound gear 31 whose large diameter gear portion meshes with the pinion 30 (see FIGS. 3 and 4), and a large diameter gear portion which is the first compound gear 31. A second compound gear 32 that meshes with the small-diameter gear portion, a third compound gear 33 that meshes with the small-diameter gear portion of the second compound gear 32, and a small-diameter gear portion of the third compound gear 33 that has the large-diameter gear portion. And a small gear portion of the fourth compound gear 34 meshes with the external teeth 211 of the cam gear 21. The motor 20 is arranged behind the cam gear 21 and the first to fourth compound gears 31 to 34 are arranged side by side in the apparatus front-rear direction above the rotation center line L1 of the cam gear 21. .

(Cam gear)
6A is a side view of the cam gear 21, the shaft-like member 23, the switch 25, the switch lever 26, and the linkage member 28, and FIG. 6B is a plan view thereof. FIG. 7 is an exploded perspective view of the cam gear 21, the shaft-like member 23, the switch 25, the switch lever 26 and the linkage member 28. FIG. 7 is an end view of the cam gear 21 as viewed from the non-output side.

  The cam gear 21 rotates around the rotation center line (axis line of the rotation shaft) L <b> 1 when the driving force from the motor 20 is transmitted to the external teeth 211. The rotation center line L1 extends in the apparatus width direction, and the right side in the apparatus width direction, that is, the side where the ice tray 3 is located is the output side of the cam gear 21. As shown in FIGS. 6 and 7, the cam gear 21 includes a large diameter portion 212 in which external teeth 211 are formed from the non-output side toward the output side, and a small diameter portion 213 having a smaller diameter than the large diameter portion 212. And a cylindrical output shaft portion 214 having a smaller diameter than the small diameter portion 213. One end portion of the rotary shaft 6 of the scraped member 4 that has been D-cut is inserted into the output shaft portion 214, whereby the scraped member 4 rotates integrally coaxially with the cam gear 21.

  As shown in FIG. 7, a first recess 40 is formed in an end surface (end surface of the rotating shaft) 21 a on the opposite side of the cam gear 21, and the first cam surface is formed on the inner peripheral surface of the first recess 40. 41 is formed. A second recess 43 is formed on the bottom surface of the first recess 40, and a second cam surface 44 is formed on the inner peripheral surface. The first cam surface 41 and the second cam surface 44 are formed at different positions in the direction of the rotation center line L1 of the cam gear 21.

  The cam follower 235a of the shaft-like member 23 described later follows the first cam surface 41 formed on the outer side in FIG. When the cam gear 21 is rotated, the shaft-like member 23 is swung according to the rotation position, and the ice amount detection lever 10 is swung.

  The first cam surface 41 is continuously counterclockwise (CCW direction), and includes an ice amount detection first cam portion 411, an ice amount detection second cam portion 412, an ice amount detection third cam portion 413, and The ice amount detection fourth cam portion 414 is provided.

  The ice amount detection first cam portion 411 is a section for maintaining the ice amount detection lever 10 in a state where it is not rotated, and is formed in an arc shape.

  The ice amount detection second cam portion 412 is a section for lowering the ice amount detection lever 10 connected to the shaft-like member 23 by swinging the shaft-like member 23, and is shown in FIG. In the lower right portion of the cam gear 21 in the state, the cam gear 21 is formed to extend outward in the radial direction from the ice amount detection first cam portion 411.

  The ice amount detection third cam portion 413 is an arc shape that is a section in which the ice amount detection lever 10 is maintained in the lowest lowered state when no ice is stored in the ice storage portion 2.

  The ice amount detection fourth cam portion 414 is a section for raising the lowered ice amount detection lever 10 and is formed to extend radially inward from the ice amount detection third cam portion 413. .

  A second cam follower 262 of the switch lever 26 described later follows the second cam surface 44. When the cam gear 21 is rotated, the switch lever 26 swings to operate the switch 25 according to the rotation position, and the switch 25 is switched on and off. The second cam surface 44 continues in a counterclockwise direction (CCW direction) from the left side portion of the cam gear 21, the first cam part 441 for switching on, the first cam part 442 for switching off, and the second cam for switching on. Part 443 and a switch-off second cam part 444.

  The switch-on first cam portion 441 is formed in an arc shape at a position near the outer peripheral edge in the left portion of the cam gear 21 in the state shown in FIG. When the ice making device 1 is in the ice making state where the ice making device 1 is producing ice, the first switch-on cam portion 441 causes the switch lever 26 to depress the switch 25 by turning the switch lever 26 and turns the switch 25 on. In this section, a signal for confirming the origin position of the scraping member 4 is output.

  The switch-off first cam portion 442 is a section for turning off the switch 25 when the ice scraping operation is started, and is formed on the inner side in the radial direction than the switch-on first cam portion 441. .

  The switch-on second cam portion 443 causes the switch lever 26 to depress the switch 25 by rotating the switch lever 26 during the ice amount confirmation operation for moving the ice amount detection lever 10 downward. This is a section for turning on and outputting an ice amount confirmation signal. The switch-on second cam portion 443 is formed at a position close to the outer peripheral edge of the cam gear 21.

  The switch-off second cam portion 444 is a section for turning off the switch 25 when the ice amount confirmation operation ends and returns to the standby state, and is more in the radial direction than the switch-on second cam portion 443. It is formed inside.

(Shaft-shaped member)
As shown in FIG. 4, the shaft-like member 23 extends from the outer side to the inner side of the device case 11 through a shaft through hole 121 formed between the joint portions of the outer case 12 and the inner case 13. . The shaft-like member 23 is disposed adjacent to the cam gear 21 in the direction of the rotation center line L1, and has a large-diameter portion 231 exposed to the outside of the device case 11 and a smaller diameter than the large-diameter portion 231. A shaft-shaped body portion (first swinging shaft) 232 extending inwardly. A circular recess 23a (see FIG. 7) is formed on the end surface of the body 232. As shown in FIG. 5, a side plate portion 122 (opposite plate portion) of the outer case 12 is formed in the circular recess 23a. The first bearing 123a provided on the bearing projection 123 protruding from the cam gear 21 to the cam gear 21 side is inserted. The first bearing 123 a is formed as a cylindrical convex portion at the tip of the bearing projection 123.

  The first bearing 123a protrudes from the bearing projection 123 toward the front of the apparatus, and the shaft-like member 23 is supported by the first bearing 123a and the shaft through hole 121 so as to be swingable about the axis. ing. As shown in FIG. 2, the shaft member swing center line L2 of the shaft member 23 (axis line of the first swing shaft) L2 when viewed from the direction of the rotation center line L1 of the cam gear 21 is the cam gear 21. It is set at a position that overlaps the lower half of the. Further, the shaft-like member swing center line L2 is orthogonal to the rotation center line L1 of the cam gear 21, and extends in the longitudinal direction of the apparatus. The large-diameter portion 231 is fixed with a mounting portion 10a serving as the center of swing of the ice amount detection lever 10. As a result, the ice amount detection lever 10 swings around the shaft-shaped member swinging center line L2 integrally with the shaft-shaped member 23.

  The body portion 232 is provided with a small-diameter portion 232a in the middle of the shaft-shaped member swing center line L2. A torsion coil spring 24 is coaxially attached to the small diameter portion 232a. One end of the torsion coil spring 24 is engaged with a spring engaging portion 234 that protrudes in the radial direction from the outer peripheral surface of the body portion 232, and the other end is a spring engaging portion (not shown) provided in the outer case 12. Is engaged. The shaft-shaped member 23 is counterclockwise (CCW) indicated by an arrow in FIG. 7 when the direction of the shaft-shaped member swing center line L2 is viewed from the body 232 side by the biasing force of the torsion coil spring 24. It is energized.

  Here, as shown in FIG. 4, the shaft-like member 23 is composed of an inner portion 23b in which a circular recess 23a is formed and an outer portion 23c having a large diameter portion 231 and a small diameter portion 232a. A second circular recess (not shown) that fits with the small-diameter portion 232a is formed on the end surface 23d of the inner portion 23b on the outer portion 23c side.

  When the shaft member 23 is mounted on the device case 11, the first bearing 123a of the bearing projection 123 is inserted into the circular recess 23a of the inner portion 23b so that the inner portion 23b can be rotated by the first bearing 123a. Stay supported. In addition, the torsion coil spring 24 is coaxially disposed in the small diameter portion 232a of the outer portion 23c so that the outer portion 23c is rotatably held in the shaft through hole 121 of the outer case 12. Thereafter, the end of the small-diameter portion 232a is fitted into the second circular recess 23a of the inner portion 23b to be integrated. Further, the torsion coil spring 24 is engaged with the spring engaging portion of the device case 11 so as to be urged by the torsion coil spring 24 in a predetermined rotational direction.

  Next, as shown in FIG. 7, a cam follower projection 235 and a switch lever regulation projection (regulation projection) 236 are formed on the outer peripheral surface of the body 232.

  The cam follower protrusion 235 protrudes from the outer peripheral surface of the body portion 232 toward the cam gear 21 toward the outer side of the cam gear 21, and a first cam surface 41 formed on the outer side of the cam gear 21 at a tip portion thereof. A slidable cam follower (first cam follower) 235a is formed. The cam follower 235a is inserted into the cam gear 21 from the opening of the first recess 40 formed in the cam gear 21, and is in contact with the first cam surface 41 from the inside. Further, the cam follower 235a can maintain a state in which the cam follower 235a is pressed against the first cam surface 41 in one swinging direction centering on the shaft-shaped member swinging center line L2 by the biasing force of the torsion coil spring 24. ing. The cam follower 235a, together with the first cam surface 41, includes a first conversion mechanism 21A (see FIG. 6) that converts the rotational motion of the cam gear 21 into a swing motion around the shaft-shaped member swing center line L3 of the shaft-shaped member 23. It is composed.

  When the cam gear 21 rotates, the cam follower 235 a slides on the first cam surface 41. As a result, the cam follower 235a is displaced in the radial direction of the cam gear 21 in accordance with the rotation angle of the cam gear 21, so that the shaft member 23 swings around the shaft member swing center line L2 within a predetermined angle range. Move. In this example, the shaft-like member 23 swings within an angle range of 30 °. Further, when the shaft-like member 23 swings, the ice amount detection lever 10 attached to the shaft-like member 23 swings within a predetermined angle range around the shaft-like member swing center line L2.

  The switch lever restricting protrusion 236 protrudes toward the opposite side of the cam gear 21 when the shaft member 23 is positioned at a predetermined angle around the shaft member swing center line L2. Is formed. When the switch lever restricting protrusion 236 is directed to the opposite side of the cam gear 21, the switch lever restricting protrusion 236 rotates the linkage member 28. Thereby, the cooperation member 28 interferes with the switch lever 26 and the switch 25 is prevented from being pressed by the switch lever 26.

(Switch, switch lever, linkage member)
Next, the switch 25, the switch lever 26, and the cooperation member 28 will be described with reference to FIGS. The switch 25 is a tact switch, and is arranged with the button 251 to be pressed facing the cam gear 21 side. In this example, the switch 25 is turned on when the button 251 is pressed away from the end face of the cam gear 21 and outputs a signal. The signal from the switch 25 is used for ice amount confirmation and origin position confirmation.

  The switch lever 26 is disposed adjacent to the cam gear 21. The switch lever 26 includes a shaft portion (second swinging shaft) 261 that is slightly inclined rearward toward the upper side, and as shown in FIG. It is supported by a second bearing 123 b provided on the bearing projection 123 of the case 12. The second bearing 123b is formed at the tip of the bearing projection 123 as a recess having a concave curved surface corresponding to the outer peripheral surface of the lower end portion of the shaft portion 261. The upper end portion of the shaft portion 261 is supported by a third bearing 124 a provided on the second bearing protrusion 124 that protrudes from the side plate portion 122 of the outer case 12 toward the cam gear 21. The third bearing 124 a is formed as a concave portion having a concave curved surface corresponding to the outer peripheral surface of the upper end portion of the shaft portion 261. Due to the second bearing 123b and the third bearing 124a, the switch lever 26 oscillates along the axis of the shaft portion 261 (the axis of the second oscillating shaft) and is orthogonal to the rotation center line L1 of the cam gear 21. The outer case 12 is supported so as to be swingable about the center line L3.

  In addition, the switch lever 26 has a cam follower (second cam follower) 262 that slides on the second cam surface 44, a switch operation unit 263, and a compression coil spring 27 at a position away from the switch lever swing center line L 3. A spring engaging portion 264 for connecting one end portion is provided. The cam follower 262, together with the second cam surface 44, constitutes a second conversion mechanism 21B (see FIG. 6) that converts the rotational motion of the cam gear 21 into a swing motion around the switch lever swing center line L3 of the switch lever 26. ing.

  The cam follower 262 and the switch operating portion 263 are provided at different angular positions around the switch lever swing center line L3 on the outer peripheral side of the shaft portion 261. The cam follower 262 is inserted into the second recess 43 through the first recess 40 of the cam gear 21 and is in contact with the second cam surface 44 from the inside.

  The switch operating portion 263 and the spring engaging portion 264 are a flat plate-shaped switch operating lever that extends in a direction perpendicular to the switch lever swing center line L3 from the shaft portion 261 in a state parallel to the switch lever swing center line L3. Is formed at the tip of the portion (operation lever) 265. In the switch operation lever portion 264, the opposite side of the tip portion from the cam gear 21 is a switch operation portion 263, and the cam gear 21 side is a spring engagement portion 264. The switch operation unit 263 can press the button 251 of the switch 25 when the switch lever 26 swings around the switch lever swing center line L3. A compression coil spring 27 is disposed between the spring engaging portion 264 and the side plate portion 122 of the inner case 13.

  The compression coil spring 27 is provided with the switch lever 26 so that the cam follower 262 is pressed against the second cam surface 44 in one swinging direction centered on the switch lever swinging center line L3. It is fast. The swinging direction in which the compression coil spring 27 biases the switch lever 26 is the same as the direction in which the switch lever 26 presses the switch 25. In this example, the switch lever 26 is urged by the compression coil spring 27 counterclockwise (CCW) indicated by an arrow in FIG. 7 when the direction of the switch lever swing center line L3 is viewed from above. .

  The link member 28, together with the switch lever restricting protrusion 236 of the shaft member 23, swings the switch lever 26 when the shaft member 23 is positioned at a predetermined angle around the shaft member swing center line L2. A linkage mechanism that restricts the swing of the center line L3 and prevents the switch 25 from being pressed is configured.

  As shown in FIG. 2 and FIG. 7, the linkage member 28 has a frame shape, a shaft-like member side frame portion 281 on the shaft-like member 23 side, a switch lever-side frame portion 282 on the switch lever 26 side, The upper frame portion 283 connecting the upper end portions of the shaft-like member side frame portion 281 and the switch lever side frame portion 282, the lower portion connecting the shaft-like member 23 side frame portion and the lower end portion of the switch lever side frame portion 282. A side frame portion 284 and a through hole 285 provided in the center of each frame portion are provided. The upper frame portion 283 is provided with a cylindrical upper shaft portion 286 extending upward, and the lower frame portion 284 is provided with a lower cylindrical shaft portion 287 extending downward. As shown in FIG. 5, the upper shaft portion 286 is swingably supported by a fourth bearing 125 provided on the upper side of the bearing projection 123 in the side plate portion 122 of the outer case 12. The portion 287 is swingably supported by the fifth bearing 126 provided below the bearing projection 123 in the side plate portion 122 of the outer case 12. The fourth bearing 125 is formed as a concave portion having a concave curved surface corresponding to the outer peripheral surface of the upper shaft portion 286, and the fifth bearing 126 is formed as a concave portion having a concave curved surface corresponding to the outer peripheral surface of the lower shaft portion 287. ing. As a result, the link member 28 is supported so as to be swingable with the axis of the upper shaft portion 286 and the lower shaft portion 287 as the link member swing center line (the swing center line of the link member) L4. The link member swing center line L4 extends in a direction intersecting with the through hole 285, and is orthogonal to the rotation center line L1 of the cam gear 21. Further, the link member swing center line L4 is slightly inclined toward the rear of the apparatus upward.

  Here, as shown in FIG. 4, in the through hole 285 of the linkage member 28, there is a bearing projection 123 that protrudes from the side plate portion 122 of the outer case 12 to the cam gear 21 side through the through hole 285. A first protrusion for swingably supporting the body 232 of the shaft-like member 23 is inserted into a tip end portion of the bearing projection 123 that protrudes toward the cam gear 21 with respect to the linkage member 28. A second bearing 123b is provided for supporting the bearing 123a and the shaft portion 261 of the switch lever 26 in a swingable manner. Further, by inserting the bearing projection 123 into the through hole 285 of the linkage member 28, the outer peripheral surface portion of the bearing projection 123 is in contact with the inner peripheral surface of the through hole 285 of the linkage member 28. This is a guide portion 123c (see FIG. 5) that guides the swing of 28.

  A part of the shaft-like member side frame portion 281 is on the shaft-like member side that can come into contact with the switch lever restricting protrusion 236 when the shaft-like member 23 is positioned at a predetermined angle around the shaft-like member swinging center line L2. A contact portion (first contact portion) 281a is formed. The switch lever side frame portion 282 has a switch lever side contact portion (first switch) that can contact the switch operation lever portion 265 of the switch lever 26 in order to restrict the rotation of the switch lever 26 about the switch lever swing center line L3. 2 abutting portion) 282a is provided.

  When the shaft-like member 23 is positioned at a predetermined angle so that the switch lever restricting protrusion 236 faces away from the cam gear 21, the shaft-like member side frame portion 281 of the linkage member 28 has a switch lever restricting protrusion 236. The portion 236 is pushed in the direction opposite to the cam gear 21. As a result, the switch lever side frame portion 282 of the linkage member 28 advances toward the cam gear 21, and the switch lever side contact portion 282 a is provided with the switch operation portion 263 of the switch operation lever portion 265 of the switch lever 26. Abuts against the side surface.

  When the link member 28 comes into contact with the switch operation lever portion 265 of the switch lever 26, the switch lever 26 is in a state where the switch operation portion 263 faces the button 251 of the switch 25 with a slight gap. Further, when the switch lever 26 attempts to swing around the switch lever swing center line L3 in the direction in which the switch 25 is pressed, the swing is prevented by interference with the cooperation member 28. As a result, pressing of the switch 25 by the switch lever 26 is prevented.

  When the cam gear 21 rotates, the cam follower 262 of the switch lever 26 slides on the second cam surface 44. As a result, the cam follower 262 is displaced in the radial direction of the cam gear 21 in accordance with the rotational angle of the cam gear 21, so that the switch lever 26 swings around the switch lever swing center line L3 within a predetermined angle range. . In this example, the switch lever 26 swings within an angle range of 10 °.

  When the cam follower 262 is displaced outward in the radial direction of the cam gear 21, the switch lever 26 swings counterclockwise when viewed from above, as shown in FIG. A button 251 is pressed. As a result, the switch 25 is turned on, and the ice amount confirmation signal or the origin position confirmation signal is output. When the cam follower 262 is displaced inward in the radial direction of the cam gear 21, the switch lever 26 swings clockwise, and a gap is formed between the switch operation unit 263 and the button 251 of the switch 25. As a result, the switch 25 is turned off and no signal is output.

  Here, when the shaft-like member 23 is positioned at a predetermined angle around the switch lever swing center line L3, the switch lever restricting protrusion 236 contacts the linkage member 28 in the direction opposite to the cam gear 21. As a result, the cooperation member 28 swings and the switch lever 26 is prevented from swinging, so that the switch lever 26 is prevented from pressing the switch 25. In the ice amount detection operation for lowering the ice amount detection lever 10, if the ice storage unit 2 is not full, the downward movement of the ice amount detection lever 10 is not hindered by the ice in the ice storage unit 2, so that the shaft-like member 23 is It is located at a predetermined angle around the shaft-like member swing center line L2. In such a case, pressing of the switch 25 by the switch lever 26 is prevented, and the switch 25 is kept off.

(Ice making operation)
FIG. 9 is a flowchart showing the ice making operation of the ice making device 1. The figure inserted in the flowchart of FIG. 9 shows the positions of the scraping claw 7 and the ice amount detection lever 10 in the corresponding step in the upper figure, and the state of the cam gear 21 in the corresponding step in the lower figure. ing. The upper diagram shows the ice making device 1 as viewed from the ice tray 3 side, and the lower diagram shows the ice making device 1 as viewed from the drive unit 9 side. FIG. 10A is a cam chart showing the initialization operation, FIG. 10B is a cam chart showing the operation when the ice storage amount is insufficient, and FIG. 10C is a case where the ice storage unit 2 is full. FIG. 10D is a cam chart showing the rotation operation of the shaft-like member 23.

  The ice making device 1 is driven and controlled by a control unit (not shown). This control unit may be provided in the ice making device 1 or may be configured as a part of a control unit of a refrigerator in which the ice making device 1 is mounted.

  When either a power-on or initialization signal is input to the control unit, the control unit performs an initialization operation for setting the ice amount detection lever 10 and the scraping claw 7 to the origin position (step ST1). .

  In the initialization operation, the control unit first drives the motor 20 to rotate the cam gear 21 counterclockwise (CCW direction). Then, it is monitored that the switch lever 26 is driven by the switch-on first cam portion 441 and a signal for confirming the origin position is output from the switch 25. When the origin position confirmation signal is output, the motor 20 is stopped after a predetermined time has elapsed. By this operation, the cam gear 21 stops at a position of −15 degrees from the origin position (0 degrees).

  Next, the control unit drives the motor 20 in the opposite direction, and rotates the cam gear 21 clockwise until the switch lever 26 is driven by the switch-off second cam unit 444 and the switch 25 is turned off (CW direction). Rotate to By this operation, the cam gear 21 is stopped at the origin position, and the ice amount detection lever 10 and the scraping claw 7 are set at the ice making position 4A shown in FIG.

  At the ice making position 4A, as shown in the drawing of step ST1, the scraping claw 7 is inclined toward the front side where the ice sliding guide member 5 is disposed. The cam follower 235 a of the shaft-like member 23 is in contact with the first ice part detection cam portion 411, and the tip of the ice quantity detection lever 10 is positioned in front of the ice tray 3. The cam follower 262 of the switch lever 26 is in contact with the switch-off first cam portion 442. As a result, the switch 25 is turned off, and no ice amount detection signal is output.

  When the initialization operation is completed, water is supplied to the ice tray 3 and a timer is set (step ST2).

  When ice is manufactured in the ice tray 3 after a predetermined time set in the timer has elapsed, the control unit drives the motor 20 to start an ice scraping operation. When the ice scraping operation is started, the ice amount checking operation is started in synchronization with the ice scraping operation (step ST3).

  More specifically, in step ST3, when the cam gear 21 is rotated clockwise (CW direction), the scraping claw 7 starts to rotate toward the ice sliding guide member 5 side. Further, the cam follower 235a slides on the ice amount detection second cam portion 412 from the time when the cam gear 21 is rotated 7 degrees from the origin position, whereby the shaft member 23 is rotated and the ice amount detection lever is rotated. 10 begins to descend.

  Further, when the cam gear 21 is rotated clockwise (CW direction) and the cam gear 21 reaches the ice amount confirmation position rotated 31 degrees from the origin position, the control unit determines whether a signal is output from the switch 25 or not. Is confirmed (step ST4). At the ice amount confirmation position, the cam follower 262 of the switch lever 26 reaches a position where it can contact the switch-on second cam portion 443.

  In step ST4, if the ice is not stored in the ice storage unit 2 when the cam gear 21 is rotated to the ice amount confirmation position, the descent of the ice amount detection lever 10 is not hindered by the ice in the ice storage unit 2. As a result, the cam follower 235a of the shaft-shaped member 23 slides on the ice amount detection third cam portion 413, and the ice amount detection lever 10 is lowered to the lowest position. Thereby, the shaft-like member 23 rotates beyond a predetermined angle (20 °) around the shaft-like member swinging center line L2.

  Here, when the shaft-shaped member 23 is positioned at an angle exceeding a predetermined angle around the shaft-shaped member swinging center line L2, the switch lever restricting protrusion 236 faces in the opposite direction to the cam gear 21, and the cooperation member 28 is turned on. Abut. As a result, the cooperation member 28 swings and the switch lever 26 is prevented from swinging, so that the switch lever 26 is prevented from pressing the switch 25. Therefore, the switch 25 is kept off.

  If no signal is output from the switch 25 before a predetermined time has elapsed since the motor 20 was driven, the control unit determines that the ice storage unit 2 is not full. Therefore, the control unit continues to drive the motor 20 and continues the ice scraping operation for rotating the cam gear 21 clockwise (CW direction) (step ST5). As a result, the ice in the ice tray 3 is placed on the upper surface of the ice sliding guide member 5 by the scraping claw 7, slides along the upper surface of the ice sliding guide member 5, and is dropped to the ice storage unit 2.

  Thereafter, after the drive of the motor 20 in the CW direction is continued, when the cam gear 21 rotates 291 degrees from the origin position, the switch lever 26 is driven by the switch-on first cam portion 441 and a signal is output from the switch 25. . After confirming that the signal is output from the switch 25, the control unit drives the motor 20 until the signal is not output from the switch 25, and rotates the cam gear 21 clockwise (CW direction) to return to the origin position. Return to.

  The cam follower 235a of the shaft-like member 23 moves from the ice amount detection fourth cam portion 414 to the ice amount detection first cam portion until the cam gear 21 rotates clockwise (CW direction) and returns to the origin position. It slides over 411. Accordingly, the shaft-like member 23 rotates in a direction to raise the ice amount detection lever 10, and the ice amount detection lever 10 returns to the ice making position 4A (step ST6). Further, the scraping claw 7 rotates once around the rotation center line L1 and returns to the ice making position 4A. (Step ST7).

  Next, when the cam gear 21 rotates to the ice amount confirmation position in step ST4, if the ice storage unit 2 stores more than a predetermined amount of ice, the ice amount detection lever 10 is lowered when the ice in the ice storage unit 2 is lowered. Therefore, the ice amount detection lever 10 does not descend to the lowest position, and the swing of the shaft-like member 23 stops at an angle. In this example, the ice storage unit 2 is full when the ice amount detection lever 10 is prevented from descending by the ice and the swing of the shaft-like member 23 is stopped at a predetermined angle (20 °). Here, when the angle is equal to or smaller than the predetermined angle around the shaft-shaped member swinging center line L2 of the shaft-shaped member 23, the switch lever restricting projection 236 is not directed in the opposite direction to the cam gear 21, and the cooperation member 28 is not in contact. As a result, since the cooperation member 28 does not swing, the rotation of the switch lever 26 is not prevented. Therefore, the cam follower 262 of the switch lever 26 slides on the switch-on second cam portion 443, and the switch operation portion 263 presses the switch 25.

  Here, if a signal is output from the switch 25 before a predetermined time has elapsed after the motor 20 is driven in the CW direction, the control unit determines that the ice storage unit 2 is full. Therefore, the control unit rotates the cam gear 21 counterclockwise (CCW direction) until the next signal from the switch 25 is output. In other words, the cam follower 262 of the switch lever 26 is rotated until the switch-on first cam portion 441 slides (step ST8). Then, after a predetermined time has elapsed since the signal was output, the motor 20 is stopped.

  By this operation, the cam gear 21 stops at a position of −15 degrees from the origin position. Thereafter, the motor 20 is driven in the CW direction, and the cam gear 21 is rotated clockwise (CW direction) until the switch lever 26 is driven by the switch-off second cam portion 444 and the switch 25 is turned off. As a result, the cam gear 21 is stopped at the origin position, and the ice amount detection lever 10 and the scraping claw 7 are set at the origin position (step ST9).

  When the control unit determines that the ice storage unit 2 is full, the operation from step ST2 to step ST9 is repeated after a predetermined time has elapsed.

(Effects of arrangement of cam gear, shaft-shaped member, switch, switch lever and linkage member)
Here, the effects of the arrangement of the cam gear 21, the shaft-like member 23, the switch 25, the switch lever 26 and the linkage member 28 that constitute the cam type power transmission mechanism 29 will be described. As shown in FIGS. 4 and 6, the body 232 of the shaft-like member 23 faces the end surface 21 a of the cam gear 21 in parallel. Further, the shaft portion 261 of the switch lever 26 faces the end surface 21a of the cam gear 21 in parallel with the shaft member 23 at a position offset in the direction of the shaft member swing center line L2 (the apparatus longitudinal direction). ing. Here, the position offset in the direction of the shaft-shaped member swinging center line L2 with respect to the shaft-shaped member 23 is a position different in the direction of the shaft-shaped member swinging center line L2, and is the shaft-shaped member swinging center. When viewed from the direction of the line L <b> 2, the position overlaps with the body 232 of the shaft-like member 23. As a result, the shaft-like member 23 and the switch lever 26 are arranged in a narrow space near the end face 21a of the cam gear 21.

  The shaft portion 261 of the switch lever 26 is disposed at a position offset with respect to the shaft-shaped member 23 in the direction of the shaft-shaped member swinging center line L2 (the apparatus longitudinal direction), and the switch 25 is disposed on the shaft-shaped member 23. On the other hand, it is arranged at a position offset in the direction of the shaft-like member swinging center line L2 (the apparatus longitudinal direction). As a result, since the shaft-shaped member 23, the switch lever 26, and the switch 25 are arranged side by side in the direction of the shaft-shaped member swing center line L2, the shaft-shaped member 23, the switch 25, and the switch lever 26 are In addition, the cam gear 21 can be arranged in a narrow space in the direction (vertical direction) parallel to the end surface 21a of the cam gear 21 and perpendicular to the shaft-like member swinging center line L2.

  Furthermore, the trunk portion 232 of the shaft-like member 23 and the shaft portion of the shaft portion 261 of the switch lever 26 have a predetermined angle (110 ° in this example) when viewed from the direction of the rotation center line L1 of the cam gear 21. The switch operating lever portion 265 of the switch lever 26 protrudes between the end face 21a of the cam gear 21 and the switch 25. As a result, the shaft-like member 23 and the switch 25 can be brought close to each other, so that the shaft-like member 23, the switch 25, and the switch lever 26 are within a narrow space even in the direction of the shaft-like member swinging center line L2. Can be placed.

  Here, a first sliding contact position 41A where the cam follower 235a of the shaft-like member 23 and the first cam surface 41 are in sliding contact, and a second sliding contact position 41B where the cam follower 262 of the switch lever 26 is in sliding contact with the second cam surface 44. Is within the range of 90 ° around the rotation center line L1 of the cam gear 21 (80 ° in this example), so that the switch lever 26 is offset in the direction of the shaft member swing center line L2 of the shaft member 23. It is easy to arrange at the position. In addition, it is easy to arrange the trunk portion 232 of the shaft-like member 23 and the shaft portion 261 of the switch lever 26 at a predetermined angle.

  Further, the side plate portion 122 of the outer case 12 is provided with a bearing projection 123 that protrudes toward the cam gear 21, and the end portion on the switch lever 26 side of the body portion 232 of the shaft-like member 23 and the switch lever 26. The end portion of the shaft portion 261 is supported by a first bearing 123a and a second bearing 123b provided on the bearing projection 123, respectively. As a result, the shaft-like member 23 and the switch lever 26 can be arranged close to each other.

  As a result, the shaft-shaped member 23, the switch lever 26, the switch 25, and the driven member 28 constituting the cam-type power transmission mechanism 29 are in the direction of the rotation center line L1 (device width direction) of the cam gear 21 and the cam gear 21. A direction (vertical direction) orthogonal to the rotation center line L1 of the shaft member 23 and the shaft member swing center line L2 of the shaft member 23, and a direction of the shaft member swing center line L2 of the shaft member 23 (front-rear direction of the apparatus) In this case, it can be configured in a narrow space. Therefore, the cam-type power transmission mechanism 29 can be arranged compactly in a narrow space.

  Further, a bearing projection 123 protruding from the side plate portion 122 of the outer case 12 through the through hole 285 to the cam gear 21 side is inserted into the through hole 285 of the linkage member 28, and the bearing projection In the portion 123, a first bearing 123a for swingably supporting the body 232 of the shaft-like member 23 and a switch lever 26 are provided at a tip portion that protrudes closer to the cam gear 21 than the linkage member 28. A second bearing 123b is provided for supporting the shaft portion 261 in a swingable manner. As a result, the link member 28 is disposed close to the shaft-like member 23 and the switch lever 26 in the vicinity of the position where the shaft-like member swing center line L2 and the switch lever swing center line intersect. Further, since the shaft-like member 23 and the switch lever 26 are disposed close to each other, the cooperation member 28 can be reduced in size.

  Further, the fourth bearing 125 and the fifth bearing 126 that support the coupling member 28 in a swingable manner, the first bearing 123a of the shaft-like member 23, and the second bearing 123b of the switch lever 26 are divided into two members. However, in this example, the fourth bearing 125 that supports the connecting member 28 so as to be swingable is provided. Since the fifth bearing 126, the first bearing 123a of the shaft-like member 23, and the second bearing 123b of the switch lever 26 are all formed in the outer case 12, which is a single member, work when incorporating these three members Improves.

  In addition, the outer peripheral surface portion 123 a of the bearing projection 123 serves as a guide portion 123 c that guides the swinging of the cooperative member 28 by contacting the inner peripheral surface of the through hole 285 of the cooperative member 28. Therefore, when the switch lever regulating protrusion 236 and the shaft-like member side contact portion 281a contact each other, the switch lever side contact portion 282a can be reliably interfered with the switch operation lever portion 265.

  Furthermore, since the periphery of the through-hole 285 is continuous, the linkage member 28 has high rigidity of the connecting member 28.

  Further, since the bearing projection 123 is formed at a position overlapping the end surface 21a of the cam gear 21 when viewed from the direction of the rotation center line L1 of the cam gear 21, the shaft member 23, the switch lever 26, and The linkage member 28 is disposed so as to overlap the cam gear 21 when viewed from the rotation center line L1.

  In the above example, the first bearing 123a that supports the end portion of the body portion 232 of the shaft-like member 23 so as to be swingable is a convex portion, and the end portion of the shaft portion 261 of the switch lever 26 is swingable. Although the second bearing 123b to be supported is a concave portion, the first bearing 123a may be formed as a concave portion and the second bearing 123b may be formed as a convex portion. Further, the first bearing 123a may be formed as a convex portion, the second bearing 123b may be formed as a convex portion, the first bearing 123a may be formed as a concave portion, and the second bearing 123b may be formed as a concave portion. In these cases, at the end portion of the body portion 232 of the shaft-shaped member 23, a concave portion or a convex portion for bearing that is opposed to the shape of the first bearing 123a is formed. Further, the end portion of the shaft portion 261 of the switch lever 26 is also provided with a shape opposite to the shape of the second bearing 123b.

  Further, in the above example, the first cam surface 41 and the second cam surface 44 are formed on the inner peripheral surface of the recess formed in the cam gear 21, but the first cam surface 41 and the second cam surface 44 are formed. It can be formed on the outer peripheral surface of the convex portion provided on the end surface 21 a of the cam gear 21. Alternatively, the first cam surface 41 may be formed on one of the inner and outer peripheral surfaces of the convex portion provided on the cam gear 21, and the second cam surface 44 may be formed on the other.

1. Ice making device, 2. Ice storage section, 3. Ice making tray, 4. Scraping member, 4A, Ice making position, 5. Ice sliding guide member, 6. Rotating shaft, 7. Scraping claw, 8. Ice making cell, 9. Drive unit, 10 · Ice amount detection lever (first driven member), 10a · Mounting portion, 11 · Case, 12 · Outer case, 13 · Inner case, 20 · Motor, 21 · Rotating shaft, 21a · End face, 21A / first conversion mechanism, 21B / second conversion mechanism, 22 / deceleration wheel train, 23 / shaft-shaped member, 23a / circular recess, 23b / inner part, 23c / outer part, 23d / end face, 24 / coil spring, 25 -Driven member, 26-Switch lever, 27-Compression coil spring, 28-Cooperating member, 29-Cam mechanism, 30-Pinion, 31-Compound gear, 32-Compound gear, 33-Compound gear, 34-Compound gear, 35・ Cooperation mechanism, 40th Recess 41, first cam surface 43, second recess 44, second cam surface 93 drive unit 121 shaft through hole 122 side plate portion 123 bearing projection 123a first bearing 123b, second bearing, 123c, guide portion 124, second bearing projection, 124a, third bearing, 125, fourth bearing, 126, fifth bearing, lower recess, 211, external teeth, 212, large Diameter part, 213, small diameter part, 214, output shaft part, 231, large diameter part, 232, trunk part, 232a, small diameter part, 234, spring engaging part, 235, protrusion for cam follower, 235a, shaft member Cam follower, 236, projection for restricting switch lever, 251, button, 261, shaft, 262, cam follower for switch lever, 263, operating lever, 264, spring engaging portion, 265, flat plate, 281, shaft Side Part, 281a, shaft-shaped member side contact part, 282, switch lever side frame part, 282a, switch lever side contact part, 283, upper frame part, 284, lower frame part, 285, through hole, 286, upper part Shaft portion, 287, lower shaft portion, 321, ice tray, 411-414, first cam surface cam portion, 441-444, second cam surface cam portion, L1, rotation center line, L2, shaft-shaped member Oscillation center line, L3 / switch lever oscillation center line, L4 / cooperation member oscillation center line

Claims (12)

A rotation axis;
A first swing shaft that faces the one end face in the direction of the axis of the rotary shaft in parallel and drives the first driven member;
A second swinging shaft that faces the end face in parallel and drives the second driven member;
The rotating shaft includes a first cam surface formed to face inward or outward in the radial direction, and the first swing shaft includes a first cam follower that contacts the first cam surface, A first conversion mechanism in which the first cam follower slides on the first cam surface and converts the rotational motion of the rotary shaft into a swing motion around the axis of the first swing shaft;
The rotating shaft includes a second cam surface formed to face inward or outward in the radial direction, and the second swing shaft includes a second cam follower that contacts the second cam surface, A second conversion mechanism in which the second cam follower slides on the second cam surface and converts the rotational motion of the rotary shaft into a swing motion around the axis of the second swing shaft;
The second swing shaft has an operation lever for driving the second driven member,
The second driven member is disposed at a position offset in the axial direction of the first swing shaft with respect to the other end side of the first swing shaft to which the first driven member is coupled at one end. A cam-type power transmission mechanism. In claim 1,
The first sliding contact position where the first cam follower slides on the first cam surface and the second sliding contact position where the second cam follower slides on the second cam surface are about the axis of the rotation shaft. A cam-type power transmission mechanism having an angle range of 90 °. In claim 1 or 2,
The first cam surface is formed on an inner peripheral surface of a first recess formed on the end surface of the rotating shaft,
The second cam surface is formed on an inner peripheral surface of a second recess formed on the end surface of the rotating shaft,
The second swing shaft is offset from the first swing shaft in the axial direction of the first swing shaft, and is between the first swing shaft and the second driven member. Placed between,
The first oscillating shaft, the second oscillating shaft, and the second driven member are orthogonal to the axial direction of the first oscillating shaft when viewed from a direction orthogonal to the end surface of the rotating shaft. The cam-type power transmission mechanism is disposed within a range of the diameter of the rotary shaft in In claim 3,
A case having a facing plate portion facing the end face of the rotating shaft;
The case includes a bearing protrusion that protrudes from the counter plate portion toward the rotating shaft,
The bearing protrusion includes a first bearing that rotatably supports an end portion of the first swing shaft on the second swing shaft side, and one end portion of the second swing shaft. Is formed so as to be swingable, and
The axis line of the first rocking shaft and the axis line of the second rocking shaft have the same distance from the end surface of the rotating shaft,
The first bearing is one of a convex portion and a concave portion formed on the bearing projection portion, and the second bearing is one of the convex portion and the concave portion formed on the bearing projection portion. A cam-type power transmission mechanism characterized by that. In claim 4,
A linkage mechanism that restricts the swing of the second swing shaft and prevents the operation of the driven member when the first swing shaft is positioned at a predetermined angle around the axis of the first swing shaft; A cam-type power transmission mechanism comprising: In claim 5,
The linkage mechanism includes a linkage member supported so as to be swingable about a swing center line orthogonal to the axis of the rotation shaft;
The first swing shaft protrudes from the outer peripheral surface of the body portion, and faces the link member when the first swing shaft is positioned at a predetermined angle around the axis of the first swing shaft. And a control projection,
The cooperating member contacts the regulating protrusion when the first swing shaft is positioned at a predetermined angle around the axis of the first swing shaft on one side of the swing center line. A first contact portion that can contact, and a second contact portion that can contact the operation lever on the other side;
When the first abutting portion comes into contact with the restricting projection, the cooperation member swings around the swing center line, the second contact portion interferes with the operation lever, and the second swinging portion A cam-type power transmission mechanism that prevents operation of the driven member by a moving shaft. In claim 6,
The linkage member includes a through hole that intersects the swing center line between the first contact portion and the second contact portion, and the bearing projection is inserted into the through hole. The cam-type power transmission mechanism is supported by the case so as to be swingable. In claim 7,
The bearing protrusion has a tip portion passing through the through hole and positioned on the rotating shaft side from the cooperation member, and the tip portion includes the first bearing and the second bearing. A cam-type power transmission mechanism characterized by In claim 8,
The cam-type power transmission mechanism, wherein an outer peripheral surface portion of the bearing projection portion is a guide portion that abuts the inner peripheral surface of the through hole and guides the swing of the cooperation member. In any one of claims 7 to 9,
The cooperative member has a cam-type power transmission mechanism in which the periphery of the through hole is continuous. An ice tray,
A scraping member that scrapes ice from the ice tray and moves it to an ice storage unit;
An ice amount detection lever that is capable of contacting the ice in the ice storage unit and is driven to swing toward the ice storage unit in order to detect the ice amount of the ice storage unit;
A switch for obtaining a signal for checking the amount of ice,
A cam-type power transmission mechanism according to any one of claims 1 to 10,
The scraping member is attached to the rotating shaft so as to rotate integrally,
The first driven member is the ice amount detection lever;
The ice driven device is characterized in that the second driven member is the switch and is switched on and off by being operated by the operation lever. In claim 11,
The ice amount detection lever is connected to one end of the first swing shaft,
The ice making device, wherein the switch is disposed on the other end side of the first swing shaft.

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