JP2011214668A - Cam power transmission mechanism and ice-making device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cam power transmission mechanism which includes a small cam mechanism having two sets of cam faces formed on a rotary body and driven members each having a cam follower.SOLUTION: The first cam face 41 along which the shaft member 23 is driven is formed on the first recessed part 40 of a cam gear 21, and the second cam face 44 along which a switch lever 26 is driven is formed on the second recessed part 43 formed in the bottom surface of the first recessed part 40. Though the shaft member 23 is swung within an angular range larger than that of the switch lever 26, the distances of the movements of the first cam follower 235a and the second cam follower 262 in the direction perpendicular to a rotating center line L1 are approximately the same since the distance M between a first swing center line L2 and the first slidable contact position 41A between the first cam follower 235a and the first cam face 41 is shorter than the distance N between a second swing center line L3 and the second slidable contact position 44A between the second cam follower 262 and the second cam face 44. Consequently, the diameter of the cam gear 21 can be suppressed.

Description

  The present invention relates to a cam-type power transmission mechanism having a cam mechanism having a cam surface formed on a circular end surface of a rotating body and a cam mechanism having two sets of driven members each having a cam follower at a position deviating from a swing center line. . In addition, the cam-type power transmission mechanism has a scraping member that scrapes out ice from the ice tray, an ice amount detection lever for confirming the ice amount in the ice storage section, and a switch for obtaining a signal for confirming the ice amount. It relates to an ice making device to be operated.

  An ice making device that transmits the rotational force of the motor via a cam-type power transmission mechanism to operate an ice amount detection lever for detecting the ice amount of the ice storage part and a switch for obtaining an ice amount confirmation signal Are described in Patent Documents 1 to 3. In the cam type power transmission mechanism, the rotational movement from the motor is divided into a rocking movement of the shaft-like member that drives the ice amount detection lever and a rocking movement of the switch lever that turns the switch on and off via the cam mechanism. The cam mechanism has a configuration in which two sets of cam surfaces formed on the circular end surface of the cam gear and a driven member having a cam follower at a portion deviating from the swing center line are used. ing.

  In Patent Document 1, a cam surface for driving the ice amount detecting lever and a cam surface for driving the switch lever are formed at different positions in the circumferential direction of one circular end surface of the cam gear. In Patent Document 2, a cam surface for driving the ice amount detecting lever is formed on one circular end surface of the cam gear, and a cam surface for driving the switch lever is formed on the other circular end surface. In Patent Document 3, the cam surface for driving the ice amount detecting lever and the cam surface for driving the switch lever are formed at different positions in the radial direction of the circular end surface of the cam gear.

JP-A-11-108513 Japanese Patent Laid-Open No. 11-37621 JP 2001-304733 A

  When the first and second cam surfaces are formed at different positions in the circumferential direction of one end surface of the cam gear as in Patent Document 1, the first and second cams rotate around the rotation center line of the cam gear. The angle ranges for forming the cam surfaces cannot be 180 ° or more, respectively. In addition, in order to obtain a state in which each cam surface of the shaft-like member and the switch lever is driven in each section in which the cam gear is rotated 180 °, the position where the shaft-like member and the switch lever slide on each cam surface. Must be set at a position 180 ° apart about the rotation center axis. As a result, the shaft member and the switch lever are disposed on both sides of the rotation center line of the cam gear, and there is a problem that the cam type power transmission mechanism is enlarged in a direction orthogonal to the rotation center line of the cam gear. is there.

  When the first cam surface is formed on one end surface of the cam gear and the second cam surface is formed on the other end surface as in Patent Document 2, the shaft shape is driven by each cam surface. The member and the switch lever are arranged on both sides of the cam gear in the direction of the rotation center line. Therefore, there is a problem that the cam type power transmission mechanism is enlarged in the direction of the rotation center line of the cam gear.

  When the first and second cam surfaces are formed at different positions in the radial direction of one end surface of the cam gear as in Patent Document 3, the problem is that the cam gear is enlarged in the radial direction. There is.

  In view of such a point, the present invention has a small cam mechanism in which two sets of cam surfaces formed on an end surface of a rotating body and two driven members each having a cam follower at a portion deviated from the swing center line are arranged. The object is to provide a cam-type power transmission mechanism. In addition, the cam-type power transmission mechanism has a scraping member that scrapes out ice from the ice tray, an ice amount detection lever for confirming the ice amount in the ice storage section, and a switch for obtaining a signal for confirming the ice amount. The idea is to propose an ice making device to operate.

In order to solve the above problems, the cam-type power transmission mechanism of the present invention includes:
A rotating body,
A first cam surface and a second cam surface formed at different positions in the direction of the rotation center line of the rotating body so as to face outward or inward in the radial direction, respectively;
A first cam follower supported so as to be swingable about a first swing center line orthogonal to the rotation center line and slidably contacting the first cam surface at a portion deviating from the first swing center line is provided. A first driven member;
A second cam follower supported so as to be swingable about a second swing center line orthogonal to the rotation center line and slidably contacting the second cam surface at a portion deviated from the second swing center line is provided. A second driven member,
The first driven member and the second driven member are both disposed adjacent to one side of the rotating body in the direction of the rotation center line,
The first cam surface is located closer to the first driven member and the second driven member than the second cam surface in the direction of the rotation center line.
The first cam follower is slidably contacted with the first cam surface, and the first cam member follows the second cam follower in a first angle range in which the first driven member swings around the first swing center line. The second driven member is larger than a second angle range in which the second driven member swings around the second swing center line by sliding on the surface,
The distance from the first swing center axis to the first sliding contact position with respect to the first cam surface of the first cam follower is the second cam surface of the second cam follower from the second swing center line. It is shorter than the distance to the 2nd sliding contact position with respect to.

  According to the present invention, the two cam surfaces on which the two driven members are respectively driven are formed at positions adjacent to the direction of the rotation center line of the rotating body. Therefore, the rotating body can be made smaller in the radial direction compared to the case where the two cam surfaces are formed so as to be adjacent to each other in the radial direction orthogonal to the rotation center line of the rotating body. Further, since the two cam surfaces are formed at different positions in the direction of the rotation center line of the rotating body, the two cam surfaces can be formed over the entire circumference of the rotation center line of the rotating body. Furthermore, since both the first driven member and the second driven member are disposed adjacent to one side in the direction of the rotation center line of the rotating body, the first driven member and the second driven member are in the direction of the rotation center line. Therefore, the cam type power transmission mechanism can be made smaller in the direction of the rotation center line than in the case where the cam type power transmission mechanism is arranged on both sides of the rotating body. Further, the first cam follower of the first driven member having a large swinging angle range is driven by the outer first cam surface, and the second driven member having a small swinging angle range is smaller than the first driven member. The two cam follower follows the second cam surface on the back side, and the distance from the first swing center axis to the first sliding contact position with respect to the first cam surface of the first cam follower is the second swing center. The distance from the line to the second sliding contact position with respect to the second cam surface of the second cam follower is shorter. As a result, the distance that the first cam follower follows the first cam surface and moves in the direction perpendicular to the rotation center line of the rotating body, and the two cam followers follow the second cam surface and the rotation center line of the rotating body. It is easy to make the distance moved in the direction orthogonal to the same distance, so that the diameter of the rotating body forming the first and second cam surfaces can be kept small.

  In the present invention, the first cam surface is formed on an inner peripheral surface of a first recess provided on one end surface in the direction of the rotation center line of the rotating body, and the second cam surface is It is desirable to form on the inner peripheral surface of the second recess provided on the bottom surface of the first recess.

  In the present invention, it is desirable that the first rocking center line and the second rocking center line are set at an equal distance from the end face of the rotating body. If it does in this way, a cam type power transmission mechanism can be reduced in size in the direction of the rotation center line of a rotating body.

  In the present invention, it is preferable that the first sliding contact position and the second sliding contact position are within a range of 90 ° around the rotation center line. In this way, it becomes easy to arrange | position the 1st driven member and the 2nd driven member in the position which adjoined. Therefore, the cam type power transmission mechanism can be made small.

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,
A drive source for rotationally driving the rotating body;
Having the above-mentioned cam type power transmission mechanism,
The scraper member is attached to the rotating body so as to rotate integrally,
The first follower member is attached so that the ice amount detection lever swings integrally,
The second driven member includes a switch operation unit for operating the switch at a portion deviated from the second swing center line.

  According to the present invention, the two cam surfaces on which the two driven members are respectively driven are formed at positions adjacent to the direction of the rotation center line of the rotating body. Therefore, the rotating body can be made smaller in the radial direction compared to the case where the two cam surfaces are formed so as to be adjacent to each other in the radial direction orthogonal to the rotation center line of the rotating body. Further, since the two cam surfaces are formed at different positions in the direction of the rotation center line of the rotating body, the two cam surfaces can be formed over the entire circumference of the rotation center line of the rotating body. Furthermore, since both the first driven member and the second driven member are disposed adjacent to one side in the direction of the rotation center line of the rotating body, the first driven member and the second driven member are in the direction of the rotation center line. Therefore, the cam type power transmission mechanism can be made smaller in the direction of the rotation center line than in the case where the cam type power transmission mechanism is arranged on both sides of the rotating body. Further, the first cam follower of the first driven member having a large swinging angle range is driven by the outer first cam surface, and the second driven member having a small swinging angle range is smaller than the first driven member. The two cam follower follows the second cam surface on the back side, and the distance from the first swing center axis to the first sliding contact position with respect to the first cam surface of the first cam follower is the second swing center. The distance from the line to the second sliding contact position with respect to the second cam surface of the second cam follower is shorter. As a result, the distance that the first cam follower follows the first cam surface and moves in the direction perpendicular to the rotation center line of the rotating body, and the two cam followers follow the second cam surface and the rotation center line of the rotating body. It is easy to make the distance moved in the direction orthogonal to the same distance, so that the diameter of the rotating body forming the first and second cam surfaces can be kept small.

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. (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. Below the front of the ice tray 3 and the drive unit 9, there is disposed an ice amount detection lever 10 that is driven to swing in the vertical direction in order to check the ice amount of the ice storage unit 2. 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. The drive unit 9 includes a motor 20 serving as a drive source for the scraping member 4 and the ice amount detection lever 10, a cam gear (rotary body) 21 connected so that the scraping member 4 rotates integrally, and the motor 20. Is provided with a reduction gear train 22 for transmitting the rotational output of the motor to the cam gear 21.

  Further, the drive unit 9 is driven by a cam gear 21, and a shaft-like member (first driven member) 23 that swings the ice amount detection lever 10 in the vertical direction and the shaft-like member 23 in one swinging direction. A torsion coil spring 24 that urges the ice, a switch 25 for outputting a signal when the ice in the ice storage section 2 is full, and a switch lever 26 (second driven member) that operates the switch 25 following the cam gear 21 And a compression coil spring 27 (see FIGS. 3 and 4) for urging the switch lever 26 in one swinging direction. 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-like member 23 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)
5A 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. 5B is a plan view thereof. FIG. 6 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 as viewed from the non-output side.

  The cam gear 21 rotates around the rotation center line 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. 5 and 6, the cam gear 21 has 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 on the end face 21 a on the counter-output side of the cam gear 21, and a first cam surface 41 is formed on the inner inner peripheral surface of the first recess 40. . 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.

  In FIG. 7, a cam follower 235a of the shaft-like member 23 described later slides on the first cam surface 41 formed on the outside. 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. The shaft-shaped trunk | drum 232 extended inside is provided. A circular recess 23a (see FIG. 6) is formed on the end surface of the body 232, and a bearing that protrudes from the side plate portion 122 (opposite plate portion) of the outer case 12 toward the cam gear 21 is formed in the circular recess 23a. A bearing convex portion 123a provided in the projecting portion 123 is inserted.

  The bearing protrusion 123a protrudes from the bearing protrusion 123 toward the front of the apparatus, and the shaft-like member 23 is swingable about the axis thereof by the bearing protrusion 123a and the shaft through hole 121. It is supported. The shaft-like member swinging center line L2 (axis line) of the shaft-like member 23 overlaps with the lower half portion of the cam gear 21 as seen from the direction of the rotation center line L1 of the cam gear 21 as shown in FIG. Set to position. 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. 6 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 bearing projection 123a of the bearing projection 123 is inserted into the circular recess 23a of the inner portion 23b, and the inner portion 23b is rotated by the bearing projection 123a. Be supported as possible. 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. 6, 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, constitutes a first rotating cam mechanism that converts the rotating motion of the cam gear 21 into a swinging motion about the shaft-shaped member swinging center line L3 of the shaft-shaped member 23.

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 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 261 that slightly inclines toward the rear of the device upward, and a lower end portion of the shaft portion 261 is a first protrusion provided on the bearing protrusion 123 of the device case 11. The bearing recess (recess) 123b is supported. The upper end portion of the shaft portion 261 is supported by a second bearing recess 124 a provided in a second bearing protrusion 124 that protrudes from the side plate portion 122 of the outer case 12 toward the cam gear 21. . Due to the first bearing recess 123b and the second bearing recess 124a, the switch lever 26 coincides with the axis of the shaft 261 and is perpendicular to the rotation center line L1 of the cam gear 21. Is supported by the outer case 12 so as to be swingable around the center.

  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 rotating cam mechanism that converts the rotating motion of the cam gear 21 into a swinging motion about the switch lever swinging center line L3 of the switch lever 26.

  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. It is formed at the tip of the portion 265. The side opposite to the cam gear 21 at the distal end is a switch operation portion 263, and the side of the cam gear 21 at the distal end is a spring engaging 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 counterclockwise (CCW) indicated by an arrow in FIG. 6 when the direction of the switch lever swing center line L3 is viewed from above by the compression coil spring 27. .

  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 FIGS. 2 and 6, the linkage member 28 has a frame shape. The shaft-like member side frame portion 281 on the shaft-like member 23 side, the 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. The upper shaft portion 286 is rotatably supported by an upper concave portion (not shown) provided on the upper side of the bearing projection 123 in the side plate portion 122 of the outer case 12, and the lower shaft portion 287 is supported by the outer case. The twelve side plate portions 122 are swingably supported by a lower concave portion 125 (see FIG. 4) provided below the bearing protrusion 123. As a result, the link member 28 is supported so as to be swingable with the axes of the upper shaft portion 286 and the lower shaft portion 287 as the link member swing center line (third swing center line) 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, a bearing protrusion 123 is inserted into the through hole 285, and the bearing protrusion 123 protrudes toward the cam gear 21 through the through hole 285.

  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 tries to swing around the switch lever swing center line L3 in the direction of pressing the switch 25, the swing is prevented by the cooperation member 28. As a result, pressing of the switch 25 by the switch lever 26 is prevented.

  Here, as shown in FIGS. 4 and 5B, the body 232 of the shaft-like member 23 faces the end surface 21 a of the cam gear 21 in parallel. 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 swinging center line L2 (the apparatus longitudinal direction). . The switch 25 is pushed down in a direction away from the end surface 21a of the cam gear 21 at a position offset in the direction of the shaft-shaped member swinging center line L2 (the apparatus longitudinal direction) with respect to the shaft-shaped member 23 and the switch lever 26. The switch operating lever portion 265 of the switch lever 26 protrudes between the end face 21 a of the cam gear 21 and the switch 25.

  Further, the shaft member swing center line L2 and the switch lever swing center line L3 are arranged at a predetermined angle when viewed from the rotation center line L1 of the cam gear 21. The first sliding contact position 41A where the cam follower 235a of the member 23 and the first cam surface 41 are in sliding contact and the 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 are the cam gear 21. Is within the range of 90 ° around the rotation center line L1. In this example, the angle formed by the shaft member swing center line L2 and the switch lever swing center line L3 is 110 °, and the first sliding contact position 41A and the second sliding position 44A are about the rotation center line L1. At an angular position 80 ° apart.

  Further, the link member 28 surrounds the bearing protrusion 123 where the shaft member 23 and the bearing of the switch lever 26 are formed, and the shaft member swing center line L and the shaft member swing center line L2 intersect. It is arranged near the position.

  As a result, as shown in FIGS. 4 and 5, the shaft member 23, the switch lever 26, the switch 25, and the driven member are moved in the direction of the rotation center line L1 (device width direction) of the cam gear 21 and the cam gear. In a direction (vertical direction) orthogonal to the rotation center line L1 of 21 and the shaft-like member swing center line L2 of the shaft-like member 23, it can be configured in a narrow space.

  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. More specifically, in the ice amount detection operation for lowering the ice amount detection lever 10, if the ice storage unit 2 is not full, the descent of the ice amount detection lever 10 is not hindered by the ice in the ice storage unit 2. The shaft member 23 is positioned at a predetermined angle around the shaft 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. 8 is a flowchart showing the ice making operation of the ice making device 1. The figure inserted in the flowchart of FIG. 8 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. 9A is a cam chart showing the initialization operation, FIG. 9B is a cam chart showing the operation when the ice storage amount is insufficient, and FIG. 9C is a case where the ice storage unit 2 is full. FIG. 9D 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 (step ST8).

  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.

(Function and effect)
According to this example, the first cam surface 41 and the second cam surface 44 on which the shaft-like member 23 and the switch lever 26 are respectively driven are formed at positions adjacent to the direction of the rotation center line L1 of the cam gear 21. . Therefore, the cam gear 21 can be made smaller in the radial direction than when the first cam surface 41 and the second cam surface 44 are formed so as to be adjacent to each other in the radial direction orthogonal to the rotation center line L1 of the cam gear 21. Can do. Further, since 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 first cam surface 41 and the second cam surface 44 are connected to the cam gear 21. It can be formed over the entire circumference of the rotation center line L1. Further, since the shaft-like member 23 and the switch lever 26 are disposed adjacent to the cam gear 21 on the end surface 21a side where the first recess 40 of the cam gear 21 is formed, the shaft-like member 23 and the switch lever 26 are arranged. Compared to the case where the cam gear 21 is disposed on both sides of the cam gear 21 in the direction of the rotation center line L1, the cam type power transmission mechanism can be made smaller in the direction of the rotation center line L1. Therefore, it is possible to reduce the size of the ice making device 1.

  Further, the first cam surface 41 on which the shaft-like member 23 having a large swinging angle range slides is formed on the inner peripheral surface of the first recess 40 provided on the end surface 21a of the cam gear 21, and the swinging angular range is provided. Since the second cam surface 44 on which the switch lever 26 that is smaller than the shaft-like member 23 slides is formed on the inner peripheral surface of the second recess 43 provided on the bottom surface of the first recess 40, FIG. As shown in (b), the distance M from the first swing center line L2 to the first sliding contact position 41A with respect to the first cam surface 41 of the first cam follower 235a is set to the second from the second swing center line L3. The distance can be shorter than the distance N to the second sliding contact position 44 </ b> A with respect to the second cam surface 44 of the cam follower 262. As a result, the distance that the first cam follower 235a moves in the direction orthogonal to the rotation center line L1 of the cam gear 21 as the first cam follower 235a follows the first cam face 41, and the two cam follower 262 follows the second cam face 44. Therefore, it is easy to make the distance moved in the direction orthogonal to the rotation center line L1 of the cam gear 21 the same distance, so that the cam gear 21 forming the first cam surface 41 and the second cam surface 44 The diameter can be kept small. Further, since the angle range in which the ice amount detection lever 10 swings can be increased, the accuracy of confirming the ice amount by the ice amount detection lever 10 can be improved.

  In this example, the shaft-like member swinging center line L2 and the switch lever swinging center line L3 are both orthogonal to the rotation center line L1 and at an equal distance from the end surface 21a of the cam gear 21 in which the first recess 40 is formed. It has been established. Therefore, the ice making device 1 can be downsized in the direction of the rotation center line L1 of the cam gear 21.

  In addition, the first sliding contact position 41 </ b> A where the cam follower 235 a of the shaft-like member 23 is in sliding contact with the first cam surface 41 and the second sliding contact where the cam follower 262 of the switch lever 26 is in sliding contact with the second cam surface 44. Since the position 44A is within a range of 90 ° around the rotation center line L1 of the cam gear 21, the shaft-like member 23 and the switch lever 26 are disposed adjacent to one side across the rotation center line L1 of the cam gear 21. When doing so, it is easy to dispose the shaft-like member 23 and the switch lever 26 in close proximity.

  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. In any case, 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, and the first cam surface 41 is formed on the side close to the shaft-like member 23 and the switch lever 26. In this case, the distance M from the first swing center line L2 to the first sliding contact position 41A with respect to the first cam surface 41 of the first cam follower 235a is set as the distance M from the second swing center line L3 to the second cam follower 262. The distance N to the second sliding contact position 44A with respect to the second cam surface 44 can be made shorter.

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 lever, 10a mounting part, 11 device case, 12 outer case, 13 inner case, 20 motor, 21 cam gear (rotary body), 21a end face, 22 Reduction gear train, 23 / shaft-shaped member, 23a / circular recess, 23b / inner part, 23c / outer part, 23d / end face, 24 / coil spring, 25 / switch, 26 / switch lever, 27 / compression coil spring, 28 / cooperation 29, cam power transmission mechanism, 30 pinion, 31 compound gear, 32 compound gear, 33 compound gear, 34 compound gear, 40 first recess, 41 first cam surface, 41A First sliding position, 43 Second recess 44, second cam surface 44A second sliding position 121 shaft through hole 122 side plate portion 123 bearing projection 123a bearing projection 123b bearing recess 124 · second bearing protrusion, 124a · second bearing recess, 125 · lower recess, 211 · external teeth, 212 · large diameter portion, 213 · small diameter portion, 214 · output shaft portion, 231 · large Diameter portion, 232, body portion, 232a, small diameter portion, 234, spring engaging portion, 235, cam follower projection, 235a, shaft-shaped cam follower, 236, switch lever regulating projection, 251, button, 261, shaft portion, 262, switch lever cam follower, 263, switch operating portion, 264, spring engaging portion, 265, flat plate portion, 281, shaft member side frame portion, 281a, shaft member side contact portion, 282 ・ Switch lever Side frame portion, 282a, switch lever side contact portion, 283, upper frame portion, 284, lower frame portion, 285, through hole, 286, upper shaft portion, 287, lower shaft portion, 321, ice tray, 411 414 · cam portion of the first cam surface, 441 to 444 · cam portion of the second cam surface, L1 · rotation center line, L2 · shaft center line of the shaft-like member, L3 · switch lever swing center line, L4 · Linking member swing center line, distance from the M · first swing center axis to the sliding contact position of the first cam follower and the first cam surface, N · second swing center line to the second cam follower and the second Distance to the sliding contact position with the cam surface

Claims (5)

A rotating body,
A first cam surface and a second cam surface formed at different positions in the direction of the rotation center line of the rotating body so as to face outward or inward in the radial direction, respectively;
A first cam follower supported so as to be swingable about a first swing center line orthogonal to the rotation center line and slidably contacting the first cam surface at a portion deviating from the first swing center line is provided. A first driven member;
A second cam follower supported so as to be swingable about a second swing center line orthogonal to the rotation center line and slidably contacting the second cam surface at a portion deviated from the second swing center line is provided. A second driven member,
The first driven member and the second driven member are both disposed adjacent to one side of the rotating body in the direction of the rotation center line,
The first cam surface is located closer to the first driven member and the second driven member than the second cam surface in the direction of the rotation center line.
The first cam follower is slidably contacted with the first cam surface, and the first cam member follows the second cam follower in a first angle range in which the first driven member swings around the first swing center line. The second driven member is larger than a second angle range in which the second driven member swings around the second swing center line by sliding on the surface,
The distance from the first swing center axis to the first sliding contact position with respect to the first cam surface of the first cam follower is the second cam surface of the second cam follower from the second swing center line. A cam-type power transmission mechanism characterized by being shorter than the distance to the second sliding contact position. In claim 1,
The first cam surface is formed on an inner peripheral surface of a first recess provided on one end surface in the direction of the rotation center line of the rotating body,
The cam-type power transmission mechanism, wherein the second cam surface is formed on an inner peripheral surface of a second recess provided on a bottom surface of the first recess. In claim 1 or 2,
The cam-type power transmission mechanism, wherein the first swing center line and the second swing center line are set at an equal distance from the end face of the rotating body. In any one of claims 1 to 3,
The cam-type power transmission mechanism, wherein the first sliding contact position and the second sliding contact position are within a range of 90 ° around the rotation center line. 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 drive source for rotationally driving the rotating body;
A cam-type power transmission mechanism according to any one of claims 1 to 4,
The scraper member is attached to the rotating body so as to rotate integrally,
The first follower member is attached so that the ice amount detection lever swings integrally,
The ice making device, wherein the second driven member includes a switch operation unit for operating the switch at a portion deviated from the second swing center line.

Images