JP6054090B2 - Washing machine - Google Patents

Description

  Embodiments described herein relate generally to a washing machine.

  In a two-tank washing machine equipped with a washing tub and a dewatering receiving tub, there is a structure that can switch the water flow and open and close the drain valve by rotating one rotating member with one operation knob. . This is configured as follows: a turning member that is turned by an operation knob; a drain valve operating portion provided on the turning member; and a substantially arcuate shape provided on the turning member. A washing timer having a guide groove formed, a rotatable water flow switching lever, and one end portion rotatably connected to the water flow switching lever, and a projection on the other end portion movably inserted into the guide groove ( A loosely-fitted interlocking member and a spring that biases the interlocking member in a predetermined direction are provided.

  In this configuration, when the operation knob is rotated in one direction by the operation knob from the state where the operation knob is in the “standard” position and is rotated to the “weak” position, the end of the guide groove is used to The water flow switching lever is rotated by pushing the protrusion of the interlocking member against the biasing force of the spring and moving the interlocking member, whereby the water flow is switched to “weak”. Further, when the operation member is rotated from the state where the operation knob is in the “weak” position to the “standard” position by rotating the rotation member in the direction opposite to the one direction, the guide groove Move in the same direction, but the protrusion of the interlocking member cannot be pushed. For this reason, the interlocking member moves in the return direction by the urging force of the spring, whereby the water flow switching lever is returned to the original position, and the water flow is switched to “standard”. At this time, the drain valve operating portion also rotates integrally with the rotating member, but the drain valve remains closed.

  On the other hand, when the operation knob is turned in the direction opposite to the one direction from the state where the operation knob is in the “standard” position and turned to the “drainage” position, the guide groove leaves the protrusion of the interlocking member. The rotating member rotates in the same direction until the drain valve operating part rotates in the same direction and pulls the valve body of the drain valve through the valve operating wire so that the drain valve is opened. Become. In addition, when the control knob is rotated from the “drain” position to the “standard” position, the drain valve operation part returns to the original position, and the drain valve is energized in the closing direction. The spring is returned to the closed state by the biasing force of the spring. At this time, the interlocking member does not move, and the water flow switching lever remains in the “weak” position.

  In the structure described above, the interlocking member is moved in one direction by the guide groove in accordance with the rotation operation of the rotating member, but cannot be returned in the opposite direction. For this reason, a spring (biasing means) for returning the interlocking member to the original position is required separately.

Japanese Patent No. 3812109

  Therefore, in a configuration in which the water flow and the drain valve opening / closing operation can be switched by rotating one rotating member, an urging means for returning the interlocking member to a predetermined position is required separately. Do not provide a washing machine.

The washing machine according to the present embodiment includes a rotating member that switches water flow and opens / closes a drain valve, a cam groove that is provided on the rotating member and includes a water flow switching groove and a drain valve opening / closing groove connected to the rotating member. A stationary guide groove provided so as to intersect with the cam groove, a drain valve operating portion provided in the rotating member, a washing timer having a rotatable water flow switching lever, and one end It provided with parts are pivotally connected to the water flow switch lever, and the interlocking member insertion section of the other end portion is inserted to be movable in the cam groove and the fixed-side guide groove, and the fixed-side guide grooves that extend toward the direction of movement of the interlocking member. In a region where the water flow switching groove portion of the cam groove moves the insertion portion of the interlocking member by rotating the rotating member, the water flow switching lever is rotated via the interlocking member to switch the water flow. In the region where the drain valve opening / closing groove portion of the cam groove is rotated by leaving the insertion portion of the interlocking member, the drain valve operating portion opens and closes the drain valve.

Schematic fracture front view of a washing machine of one embodiment Overall perspective view Longitudinal front view near the bottom of the washing tub Top view near the operation unit Rear view of the operation unit near the back of the base member (rotating member in the “strong water flow” position) Sectional view along line X6-X6 in FIG. Sectional view along line X7-X7 in FIG. Rear view of the base member alone in the operation unit The perspective view near the insertion part at the other end of the interlocking member FIG. 5 equivalent view in a state where the rotating member is rotated to the “weak water flow” position. FIG. 5 equivalent view in a state where the rotating member is rotated to the “drainage” position.

Hereinafter, an embodiment will be described with reference to the drawings.
First, FIG. 1 and FIG. 2 show the overall configuration of a washing machine, particularly a two-tank washing machine. 1 and 2, the base 2 of the washing machine body 1 is made of synthetic resin and has a rectangular container shape. A synthetic resin tank 3 is provided on the base 2. The tub body 3 is integrally provided with a washing tub 4 and a dewatering tub 5 arranged side by side. The washing tub 4 is provided with an overflow strainer 6 at one location on the inner peripheral side, and a pulsator 7 is rotatably disposed at the inner and lower portion. The pulsator 7 is provided with a plurality of stirring protrusions 8 on the upper surface. Inside the dewatering tank 5, a dewatering basket 10 having a large number of dewatering holes 9 on the peripheral side portion is rotatably disposed. Below the dewatering tank 5, a dewatering motor 11 that rotationally drives the dewatering basket 10 and a brake device 12 that stops the rotation of the dewatering motor 11 are disposed.

  As shown in FIG. 3, a drain outlet 13 is provided at the bottom of the washing tub 4, and a drain pipe 14 is connected to the drain outlet 13. A water inlet 16 a of a valve case 16 in the drain valve 15 is connected to the tip of the drain pipe 14. Accordingly, the drain valve 15 communicates with the drain port 13 via the drain line 14. In the drain valve 15, the valve body 17 provided in the valve case 16 is normally kept in a closed state by being pressed against the valve seat 19 by the compression spring 18, and from this state, the valve rod 20 and the connecting spring 21 are used to open the valve. The operation wire 22 is pulled up to be in an open state. The other end portion of the valve operation wire 22 is connected to a drain valve operation portion 56 of a rotating member 50 provided in an operation portion 37 described later.

  A drainage hose (not shown) for draining outside the machine is connected to the water outlet 16b of the valve case 16. A drain outlet 23 (see FIG. 1) is also provided at the bottom of the dewatering tank 5, and this drain outlet 23 is also connected to the drain hose. In the drain pipe 14, a foreign matter capturing part 24 is formed below the drain port 13 and upstream of the drain valve 15 as shown in FIG. 3. In this case, the foreign matter capturing part 24 is formed from a concave part that is lower by one step than the corresponding part of the drainage pipe 14. Instead, a plurality of barb-like projections are provided in the corresponding part of the drainage pipe 14. You may make it comprise by.

  A bearing housing 25 is provided on the outer lower surface of the washing tub 4. The shaft end portion 26a protruding upward from the bearing housing 25 penetrates the bottom portion of the washing tub 4 in a watertight and rotatable manner and protrudes into the lower portion of the washing tub 4. The pulsator 7 is screwed into the protruding portion at the protruding portion. Is detachably attached. A driven pulley 28 is attached to the other shaft end portion 26 b protruding downward from the bearing housing 25. A washing motor 29 is disposed below the washing tub 4 at a position slightly separated from the driven pulley 28 as shown in FIG. 1, and a drive pulley 30 attached to the rotating shaft of the washing motor 29 and A transmission belt 31 is stretched between the driven pulley 28 and the driven pulley 28.

  As a result, the pulsator 7 is rotationally driven by the washing motor 29 through the drive pulley 30, the transmission belt 31, and the driven pulley 28 in order, and in particular, is rotated at low speed alternately in both the clockwise and counterclockwise forward and reverse directions. By the rotation, the laundry (not shown) accommodated in the washing tub 4 is agitated and washed with washing water (also not shown). Further, the dewatering basket 10 is directly driven to rotate by the dehydrating motor 11, and in particular, is driven to rotate at a high speed in one direction, and the laundry accommodated in the dewatering basket 10 is centrifugally dehydrated by the rotation. . Accordingly, the washing motor 26, the driving pulley 30, the transmission belt 31, and the driven pulley 28 constitute a driving device that rotationally drives the pulsator 5, and the dehydrating motor 11 is a driving device that rotationally drives the dewatering basket 10. It functions.

  An upper cover 34 is attached to the upper portion of the tank body 3. The upper cover 34 is detachably provided with a washing lid 35 that opens and closes the upper surface opening of the washing tub 4, and a dehydration lid 36 that opens and closes the upper surface opening of the dehydration tub 5. . The dehydrating lid 36 is rotatable in the vertical direction with the rear portion as a fulcrum. An operation unit 37 is provided at the rear part of the upper cover 34.

  On the upper surface 38a of the base member 38 in the operation section 37, as shown in FIG. 4, the operation knob 40 for the washing timer, the operation knob 41 for switching the water flow and opening / closing the drain valve, and the dehydration timer are used from the left. Are provided with an operation knob 42, a hose connection port 43, and an operation knob 44 for switching the water injection destination. Among these, the operation knob 40 for the laundry timer is for operating the laundry timer 45 (see FIG. 5) provided on the back surface 38b side of the base member 38. On the back surface of the washing timer 45, a water flow switching lever 46 is provided so as to be rotatable about a shaft portion 46a. This water flow switching lever 46 is for switching the inversion time of the pulsator 7 forming the water flow, and can be switched between strong water flow and weak water flow by its rotation.

  As will be described later, an operation knob 41 for switching the water flow and opening / closing the drain valve is used for operating switching of the strength of the water flow and switching of the opening / closing operation of the drain valve 15 via the water flow switching lever 46. Is. The operation knob 42 for the dehydration timer is for operating the dehydration timer 47 (see FIG. 5) provided on the back surface 38b side of the base member 38. The hose connection port 43 is for connecting the other end of a water supply hose (not shown) whose one end is connected to a tap. The operation knob 44 for switching the water supply destination is provided so as to be slidable in the left-right direction. When the operation knob 44 is slid to the left, the tap water supplied from the water supply hose is moved to the washing tub 4 side. When the operation knob 44 is slid to the right, the tap water supplied from the water supply hose is supplied to the dewatering basket 10 side.

  Now, the parts operated by the operation knob 41 for switching the water flow and opening / closing the drain valve will be described with reference to FIGS. The base member 38 is provided with a circular mounting hole 49 (see FIGS. 6 and 8) corresponding to the portion to which the operation knob 41 is mounted, and the rotation member 50 of the base member 38 is provided in the mounting hole 49. It is fitted so as to be rotatable from the back side. A connecting shaft portion 51 serving as a rotation center of the rotating member 50 passes through the mounting hole 49 and protrudes toward the upper surface 38 a of the base member 38, and the operation knob 41 is attached to the connecting shaft portion 51. . Therefore, by turning the operation knob 41, the turning member 50 is also turned in the same direction. The rotation center of the rotation member 50 is indicated by O.

  The rotating member 50 is formed with a cam groove 52 penetrating in the thickness direction. The cam groove 52 has a drain valve opening / closing groove 53 and a water flow switching groove 54 that are continuous with each other. Of these, the drain valve opening / closing groove 53 is formed in an arc shape having a substantially constant radius r from the rotation center O of the rotation member 50. Further, the water flow switching groove 54 is formed in a curved shape in which the radius r from the rotation center O changes. And in the connection part 55 (refer FIG. 10) of the groove part 53 for drain valve opening / closing, and the groove part 54 for water flow switching, each tangent is connected with the curve so that it may continue.

  The rotating member 50 is provided with a drain valve operating portion 56 that is located on the opposite side of the portion where the cam groove 52 is provided and the rotation center O, and the drain valve operating portion 56 includes the valve The other end of the operation wire 22 is connected. In FIG. 5, reference numeral 57 denotes a hook portion for hooking the middle portion of the valve operation wire 22, and is provided on a member different from the base member 38 in the operation portion 37. Further, a positioning convex portion 50 a is provided at one place on the outer peripheral portion of the rotating member 50.

  As shown in FIG. 8, a fixed-side guide groove 58 is provided on the back surface 38 b of the base member 38 so as to be positioned outside the attachment hole 49. The fixed-side guide groove 58 extends linearly from the outside of the attachment hole 49 toward the dehydration timer attachment portion 59 side. The cam groove 52 and the fixed guide groove 58 always intersect each other regardless of the rotation position of the rotation member 50 in a state where the rotation member 50 is disposed on the back side of the base member 38. A first positioning portion 60 and a second positioning portion 61 are provided on the back surface 38 b of the base member 38 so as to be positioned around the attachment hole 49. Of these, the first positioning portion 60 is disposed on the front side of the mounting hole 49 in FIG. 8 and has a configuration in which two semi-cylindrical portions are erected side by side, and has an “m” shape in plan view. (See FIG. 5). A recess 60a is formed between the semi-cylindrical portions. The second positioning portion 61 is arranged on the left side of the first positioning portion 60 in FIG. 8 and has a form in which one semicylindrical portion is erected, and has an arc shape when viewed in plan (FIG. 10). reference). These first and second positioning portions 60 and 61 are formed so as to be elastically deformable.

  An interlocking member 63 is provided between the cam groove 52 in the rotating member 50 and the other end of the water flow switching lever 46. The interlocking member 63 has a lever shape extending in the left-right direction in FIG. 5, and as shown in FIG. 6, the connecting portion 64 at one end rotates around the connecting hole 46 b at the other end of the water flow switching lever 46. It is linked movably. Further, as shown in FIG. 9, the other end portion of the interlocking member 63 is provided with a shaft-like insertion portion 65, and the distal end portion of the insertion portion 65 is formed as shown in FIGS. The cam groove 52 and the fixed guide groove 58 are movably inserted. A flange 66 protruding in the longitudinal direction of the interlocking member 63 protrudes from the outer peripheral portion of the insertion portion 65. As shown in FIG. 6, the flange 66 is located between the fixed guide groove 58 and the cam groove 52, intersects the cam groove 52, and the insertion portion 65 comes out of the cam groove 52. To prevent that. In FIG. 8, the base member 38 is provided with a washing timer attachment hole 67 on the opposite side of the dehydration timer attachment portion 59 with the attachment hole 49 interposed therebetween, and the washing timer 45 is attached thereto. .

Next, the operation of the above configuration will be described.
When the operation knob 41 for switching the water flow and opening / closing the drain valve is positioned at the “strong water flow” position as shown in FIG. 4, the rotating member 50 on the back side is rotated to the position shown in FIG. Yes. In this state, the positioning convex portion 50a of the rotating member 50 enters the concave portion 60a of the first positioning portion 60 on the back surface 38b of the base member 38, and the rotating member 50 and thus the operation knob 41 are in the “strong water flow” position. It is positioned. In this state, the connecting portion 55 between the drain valve opening / closing groove 53 and the water flow switching groove 54 in the cam groove 52 of the rotating member 50 is located in the vicinity of the distal end portion of the fixed-side guide groove 58. Further, the insertion portion 65 at the other end of the interlocking member 63 is inserted and disposed near the connecting portion 55 of the cam groove 52 and the distal end portion of the fixed-side guide groove 58, and the connecting portion 64 at one end of the interlocking member 63. Is connected to the water flow switching lever 46 in the direction of arrow B1 in FIG. In this state, “strong water flow” is set. Furthermore, the drain valve operation part 56 provided in the rotation member 50 is located on the right side of the rotation center O of the rotation member 50 in FIG. In this state, the valve element 17 of the drain valve 15 is held in the closed position by the urging force of the compression spring 18, and the drain valve 15 is in a closed state.

  When the operation knob 41 is rotated from the “strong water flow” position in FIG. 4 to the “weak water flow” position in the direction of the arrow A1 in FIG. 4, the rotation member 50 is also rotated in the direction of the arrow A1. Is done. In FIG. 5, since it is seen from the back side, the direction of the arrow is reversed. Then, the water flow switching groove portion 54 in the cam groove 52 moves the insertion portion 65 of the interlocking member 63, and the insertion portion 65 moves along the fixed side guide groove 58. At this time, since the water flow switching groove 54 changes so that the radius from the rotation center O becomes smaller, the insertion portion 65 of the interlocking member 63 rotates along the fixed side guide groove 58. It moves in the direction approaching the moving center O (the direction of arrow C1 in FIG. 10). Accordingly, the interlocking member 63 moves in the direction of the arrow C1, and the water flow switching lever 46 rotates in the direction of the arrow B2 in FIG. When the operation knob 41 is rotated to the “weak water flow” position, the positioning convex portion 50a of the rotating member 50 gets over the second positioning portion 61 and engages with the second positioning portion 61 as shown in FIG. The moving member 50 and the operation knob 41 are positioned at the “weak water flow” position. In this state, the water flow switching lever 46 is rotated in the direction of the arrow B2 to set “weak water flow”. In this case, the drain valve operating portion 56 is also rotated in the direction of the arrow A1 along with the rotation of the rotating member 50. However, since the valve operating wire 22 is loosened, the drain valve 15 remains closed. .

  When the operation knob 41 is rotated from the “weak water flow” position in FIG. 10 to the “strong water flow” position, each member rotates or moves in the opposite direction to the above, It is returned to the “water flow” position. Specifically, when the rotation member 50 is rotated in the direction of arrow A2 in FIG. 10 by the operation knob 41, the water flow switching groove portion 54 in the cam groove 52 moves the insertion portion 65 of the interlocking member 63. The insertion portion 65 moves along the fixed-side guide groove 58. At this time, since the water flow switching groove 54 changes so that the radius from the rotation center O becomes larger, the insertion portion 65 of the interlocking member 63 rotates along the fixed-side guide groove 58. It moves in the direction away from the moving center O (the direction opposite to the arrow C1 in FIG. 10). Accordingly, the interlocking member 63 moves in the direction opposite to the arrow C1, and the water flow switching lever 46 rotates in the direction opposite to the arrow B2 in FIG. 10 (the direction of arrow B1 in FIG. 5). When the operation knob 41 is rotated to the “strong water flow” position, the positioning convex portion 50a of the rotating member 50 enters the concave portion 60a of the first positioning portion 60 as shown in FIG. As a result, the operation knob 41 is positioned at the “strong water flow” position. In this state, the water flow switching lever 46 is rotated in the direction of the arrow B1 to set “strong water flow”. In this case, the drain valve operating portion 56 is also rotated in the direction of the arrow A2 with the rotation of the rotating member 50, but the drain valve 15 remains closed.

  On the other hand, when the operation knob 41 is turned from the state of “strong water flow” in FIG. 4 to the direction of arrow A2 in FIG. 4 which is the direction of “drainage”, the turning member 50 is also in the direction of arrow A2 in FIG. Is rotated. Then, the drain valve opening / closing groove 54 in the cam groove 52 is rotated in the direction of the arrow A <b> 2, leaving the insertion portion 65 of the interlocking member 63. At this time, since the drain valve opening / closing groove 54 has a substantially constant radius from the rotation center O, no force is generated to move the insertion portion 65, and the interlocking member 63 remains in the position shown in FIG. In this state, the water flow switching lever 46 is not rotated, and only the rotating member 50 is rotated in the direction of the arrow A2.

  When the rotating member 50 is rotated about 90 degrees in the direction of arrow A2 from the position of FIG. 5, as shown in FIG. 11, the drain valve operating portion 56 is also rotated about 90 degrees in the direction of arrow A2. Accordingly, the valve element 17 of the drain valve 15 is pulled up against the urging force of the compression spring 18 through the valve operation wire 22, and thereby the drain valve 15 is opened. At this time, the valve operating wire 22 is positioned on the left side in FIG. 11 with respect to the rotation center O of the rotation member 50, so that the rotation member 50 is prevented from rotating in the arrow A <b> 1 direction. As a result, the operation knob 41 is held at the “drainage” position.

  When the operation knob 41 is rotated from the “drainage” position of FIG. 11 to the “strong water flow” position, the rotation member 50 (drainage valve operation unit 56) rotates in the opposite direction to the above. While returning to the “strong water flow” position shown in FIG. 5, the valve element 17 of the drain valve 15 is returned to the closed position by the urging force of the compression spring 18, and the drain valve 15 is closed. Also at this time, the interlocking member 63 does not move, and the water flow switching lever 46 is not rotated and remains in the “strong water flow” position.

  In the embodiment described above, the following operational effects can be obtained. By rotating one rotation member 50 with one operation knob 41 for switching the water flow and opening / closing the drain valve, the water flow can be switched and the opening / closing operation of the drain valve 15 can be switched. Moreover, in this embodiment, the water flow switching lever 46 can be reciprocally rotated via the interlocking member 63 by the water flow switching groove 54 in the cam groove 52 provided in the rotation member 50. Therefore, the switching operation of both “strong water flow” → “weak water flow” and “weak water flow” → “strong water flow” can be performed only by the rotation operation of the rotation member 50, and the interlocking member is moved to the original position. A biasing means such as a spring for returning to the back is not required separately, the number of components can be reduced, the configuration can be simplified, and the reliability of the switching operation can be improved.

  The drain valve opening / closing groove 53 of the cam groove 52 is formed in an arc shape having a substantially constant radius r from the rotation center O of the rotation member 50, and the drain valve opening / closing groove 53 is an interlocking member 63. The drain valve 15 is opened and closed by the drain valve operating portion 56 in the region moving with respect to the insertion portion 65, but the water flow switching lever 46 is not rotated. Further, the water flow switching groove portion 54 of the cam groove 52 is formed so that the radius r from the rotation center O of the rotating member 50 is changed, and the water flow switching groove portion 54 is the insertion portion 65 of the interlocking member 63. On the other hand, the water flow switching lever 46 is rotated via the interlocking member 63 to switch the water flow, but the drain valve 15 is not opened or closed. According to such a configuration, the opening / closing of the drain valve 15 does not change at the position where the water flow is switched while using one rotating member 50, and at the position where the opening / closing of the drain valve 15 is switched. The position of the water flow switching lever 46 can be kept unchanged and the operability can be ensured.

  The cam groove 52 has a drain valve opening / closing groove 53 formed in an arc shape having a substantially constant radius r from the rotation center O of the rotation member 50 and a radius r from the rotation center O of the rotation member 50. The water flow switching groove portion 54 formed so as to change is provided continuously, and the connecting portion 55 between the drain valve opening / closing groove portion 53 and the water flow switching groove portion 54 is connected so that each tangent line is continuous. It has a configuration. Thereby, the connection part 55 becomes a smooth curve shape. As a result, when the rotation member 50 is rotated to continuously switch the drain valve opening / closing groove 53 with a constant radius from the drain valve opening / closing groove 53 to the water flow switching groove 54 with a changing radius. The rotating member 50 and the insertion portion 65 can be operated smoothly, and the occurrence of failure can be reduced even during long-term use.

  A fixed-side guide groove 58 into which the insertion portion 65 of the interlocking member 63 is inserted is provided integrally with a base member 38 that is a component that rotatably supports the rotating member 50, and the base member 38 has a water flow switching switch. A washing timer 45 having a lever 46 is also attached. By adopting such a configuration, it is possible to prevent the positional deviation at the time of assembly of the stationary guide groove 58, the rotating member 50, the water flow switching lever 46 of the washing timer 45, and the interlocking member 63, and to ensure a stable switching operation. be able to.

(Other embodiments)
The water flow switching lever 46 switches the water flow between the strong water flow and the weak water flow by switching the inversion time of the pulsator 7 that forms the water flow, but may switch the strength of the water flow itself.

  As described above, according to the washing machine of the present embodiment, it is possible to perform switching of the water flow and switching of the opening / closing operation of the drain valve by rotating one rotating member. In addition, in the present embodiment, the water flow switching lever can be reciprocally rotated through the interlocking member by the water flow switching groove portion in the cam groove provided in the rotating member. For this reason, the switching operation of both “strong water flow” → “weak water flow” and “weak water flow” → “strong water flow” can be performed only by the rotation operation of the rotation member, and the interlocking member is returned to the original position. A biasing means such as a spring for returning is not required separately, the number of components can be reduced, the configuration can be simplified, and the reliability of the switching operation can be improved.

  Although the embodiments of the present invention have been described, these embodiments are presented as examples, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 1 is a washing machine main body, 4 is a washing tub, 5 is a dewatering tub, 15 is a drain valve, 22 is a valve operation wire, 37 is an operation part, 41 is an operation knob for switching the water flow and opening / closing the drain valve, 45 Is a washing timer, 46 is a water flow switching lever, 50 is a rotating member, 52 is a cam groove, 53 is a drain valve opening / closing groove, 54 is a water flow switching groove, 55 is a connection portion, 56 is a drain valve operating portion, 58 Denotes a fixed side guide groove, 63 denotes an interlocking member, 64 denotes a connecting portion (one end portion), and 65 denotes an insertion portion (the other end portion).

Claims (4)

A rotating member for switching the water flow and opening and closing the drain valve;
A cam groove provided on the rotating member and having a water flow switching groove and a drain valve opening / closing groove connected to the water flow switching groove;
A fixed-side guide groove provided to intersect the cam groove;
A drain valve operating portion provided on the rotating member;
A washing timer having a pivotable water flow switching lever;
An interlocking member having one end portion rotatably connected to the water flow switching lever and an insertion portion at the other end movably inserted into the cam groove and the fixed guide groove;
The fixed side guide groove extends in the moving direction of the interlocking member,
In a region where the water flow switching groove portion of the cam groove moves the insertion portion of the interlocking member by rotating the rotating member, the water flow switching lever is rotated via the interlocking member to switch the water flow. In the region where the drain valve opening / closing groove part of the cam groove rotates by leaving the insertion part of the interlocking member by rotating the rotating member, the drain valve operating part opens and closes the drain valve. A washing machine characterized by operating. The drain valve opening / closing groove portion of the cam groove is formed in an arc shape having a substantially constant radius from the rotation center of the rotating member, and the drain valve opening / closing groove portion is formed in the insertion portion of the interlocking member. On the other hand, in the area that moves, the drain valve is opened and closed by the drain valve operating unit, but the water flow switching lever is not rotated,
The water flow switching groove portion of the cam groove is formed so that the radius from the rotation center of the rotating member changes, and the water flow switching groove portion moves relative to the insertion portion of the interlocking member. The washing machine according to claim 1, wherein in the region, the water flow switching lever is rotated via the interlocking member to switch the water flow, but the drain valve is not opened and closed. .   The cam groove has a drain valve opening / closing groove formed in an arc shape having a substantially constant radius from the rotation center of the rotation member, and a radius from the rotation center of the rotation member is changed. The formed water flow switching groove is continuously provided, and the connecting portion between the drain valve opening / closing groove and the water flow switching groove is connected so that each tangent is continuous. The washing machine according to claim 1 or 2.   The fixed side guide groove is provided integrally with a base member that rotatably supports the rotating member, and the washing timer is also attached to the base member. The washing machine according to any one of the above.

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