JP4318927B2 - Electric washing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric washing machine.
[0002]
[Prior art]
[Patent Document 1]
JP 2000-14777 A
Japanese Patent Laid-Open No. 2004-228561 provides a meshing clutch / detent device in a drive mechanism that rotationally drives a washing / dehydrating tub and a stirring blade, and the washing / dehydrating tub and the agitation device via the clutch / detent device by a drive motor. An electric washing machine is described in which the agitation blades are rotationally driven with the blades integrated or with the washing / dehydrating tank stopped.
[0003]
In the washing process, the clutch / detent device functions to lock the washing / dehydrating tub in a stopped state and to rotate only the stirring blade by a drive motor. It functions so as to be rotationally driven integrally by a drive motor.
[0004]
The clutch / rotation device that realizes such a drive mode switching function includes a driven pulley that is coupled to a stirring blade driving shaft and belted on a driving pulley of a driving motor, and an outer periphery of the washing / dehydrating tub driving shaft. A slider that selectively engages with an engaging portion formed on the driven pulley side or a rotation preventing portion formed on the housing side by moving up and down by engaging with a spline formed on A coil spring provided so as to be pressed down and engaged with the driven pulley side, and a slider is pushed up against the pressing force of the coil spring and released from the driven pulley side to be engaged with the detent portion. An operation lever that acts on the slider, a drive lever that is driven by a cam of the drainage electric valve device to drive the operation lever, and a valve drive motor that rotationally drives the cam.
[0005]
In the washing process, the drainage electric valve device pushes the operation lever up through the drive lever by rotating the cam when the valve drive motor is driven to drive the cam so as to close the drainage valve, and rotates the slider. Engage with the stop and lock. Further, in the dehydration process, the valve drive motor is operated so as to open the drain valve and the cam is rotationally driven to release the operating lever push-up force via the drive lever by the rotation of the cam. The slider is pushed down by the pressing force, released from the rotation stopper, and engaged with the driven pulley to rotate integrally with the driven pulley.
[0006]
Such a clutch / non-rotating device has a large reaction force on the driving lever and the operating lever when the slider stops in the middle of the washing process without pushing the operating lever in the process of pushing up the operating lever by the driving lever. Therefore, an operation element that can be retracted is provided between the drive lever and the operation lever to prevent an excessive reaction force from being generated. Also, in the dehydration process, if the operating lever is completely released to engage the slider with the driven pulley, the operating lever will be in a free state and cause vibration noise. In this case, it is necessary to apply a pressing force that lightly contacts the operating lever with the slider.
[0007]
[Problems to be solved by the invention]
Such a conventional clutch / detent device in an electric washing machine has a complicated structure and dimensional accuracy management is troublesome. That is, in the washing process, an operating element that moves backward is necessary to prevent a large reaction force from being generated when the sliding element is poorly engaged, and in the dehydrating process, the operating lever is pressed lightly to the slider. Dimensional accuracy for applying pressure is required. In addition, since the slider rotates in the dehydration step, the contact portion between the operation lever and the slider needs to have a wear-resistant structure.
[0008]
One object of the present invention is a drive mechanism for rotationally driving a washing / dehydrating tub and a stirring blade, and rotating the agitating blade driving shaft by rotating the washing / dehydrating tub driving shaft. Tub fixed washing to be performed, and tub free washing to be performed by rotating the stirring blade driving shaft with the washing / dehydrating tub driving shaft in a freely rotating state, Alternatively, the washing / dehydrating tub driving shaft and the stirring blade driving shaft are integrally rotated. Of dehydration An object of the present invention is to realize vibration prevention and simplification of a lever mechanism for operating a slider in a clutch / non-rotating device that realizes a drive mode switching function.
[0009]
Another object of the present invention is to alleviate the dimensional accuracy of the components in such a clutch / detent device.
[0010]
Another object of the present invention is to obtain a driving force for driving the lever mechanism from the valve driving motor of the drainage electric valve device and to reduce an increase in driving load of the valve driving motor.
[0011]
[Means for Solving the Problems]
The present invention provides a clutch / detent having a slider operated by a slider operating lever driven by a cam of a drainage electric valve device, wherein a washing / dehydrating tub and a stirring blade are rotatably provided in the outer tub In the electric washing machine that transmits the rotation of the washing drive electric motor to the washing / dehydrating tub and / or the stirring blade via the device, and locks the rotation of the washing / dehydrating tub to prevent rotation.
The clutch / detent device presses the slider engaged with the washing / dehydrating tub driving shaft to be engaged with the stirring blade driving shaft by the first spring, and the slider operating lever is The slider is moved against the first spring and biased by the second spring so as to be locked to the detent portion,
In the drainage electric valve device, the slider operating lever is moved in such a direction as to allow the cam to operate the valve body so that the slider is moved to engage with the stirring blade driving shaft by the first spring. It is characterized in that it is configured to be turned against the second spring.
[0012]
Further, the present invention provides a clutch / non-rotating device in which a washing / dehydrating tub and a stirring blade are rotatably provided in an outer tub, and the slider is operated by a slider operating lever driven by a cam of the drainage electric valve device. In the electric washing machine that transmits the rotation of the washing drive electric motor to the washing / dehydrating tub and / or the stirring blade through the squeeze to lock the washing / dehydrating tub and prevent it from rotating,
The clutch / detent device presses the slider engaged with the washing / dehydrating tub driving shaft to be engaged with the stirring blade driving shaft by the first spring, and the slider operating lever is The slider is moved against the first spring and biased by the second spring so as to be locked to the detent portion,
The drainage motor-operated valve device connects an operation rod for opening the valve element biased to close the drainage passage by a third spring and a cam so as to have a freely movable relative range. The slider operating lever in a direction allowing the slider to move so as to engage with the stirring blade driving shaft by the first spring in a rotation region within a freely movable range of the cam. Is configured to be turned against the second spring.
[0013]
The clutch / detent device is The washing / dehydrating tub is locked or rotated freely according to the position of the slider moved by the slider operating lever turned by the cam. Select tank fixed washing and tank free washing that rotate rotation of drive motor to the stirring blade and rotate the stirring blade It is characterized by doing.
[0014]
Further, the slider operating lever forms a gap with the slider in a state of being turned by the top of the peak portion of the cam, and the bottom portion in a state of being turned so as to face the bottom of the valley portion. It is characterized in that a gap is formed between the two.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 is a longitudinal side view of an electric washing machine showing an embodiment of the present invention, and FIG. 2 is an enlarged view of a bottom of a washing and dewatering tub located at the bottom of an outer tub, a stirring blade, and a clutch / detent device. FIG. 3 is a bottom view showing a drive motor, a clutch / non-rotation device, and a drainage electric valve device located at the bottom of the outer tub, and FIG. 4 is a bottom view showing the washing process. FIG. 5 is a longitudinal side view showing the clutch / rotation prevention device and the drainage motor operated valve device in a cross section along the center thereof and an expanded view. FIG. 5 shows the clutch / rotation prevention device and the drainage motor operated valve device along the center of the dewatering process. FIG. 6 is a control circuit diagram, and FIG. 7 is a washing step (a) showing the relationship among the slider, the operating lever, and the cam in the drainage electric valve device in the clutch / detent device. And dehydration process (b) FIG. 8 is a schematic diagram showing a positional relationship among a valve element, an operating rod, a cam, an operation lever and a cam in a clutch / non-rotating device in the drainage electric valve device, and driving acting on the cam. It is a load characteristic figure (d).
[0017]
As shown in FIGS. 1 to 5, the electric washing machine in this embodiment includes a steel plate side plate 101 configured as a substantially rectangular tube shape so as to surround a side surface as an outer frame 1, and an open end at the upper portion thereof. An upper cover 102 installed at the upper end of the side plate 101 and an outer frame base 103 installed at the lower end of the side plate 101 are provided. The side plate 101 is configured by combining a substantially U-shaped steel plate that forms the front surface and both side surfaces and a substantially flat steel plate that forms the rear surface.
[0018]
The upper cover 102 is a member formed by molding a synthetic resin. The upper cover 102 is provided with a clothing insertion opening 102a at a substantially central portion thereof, and a front panel box 102b is provided at a front side portion of the clothing insertion opening 102a. Includes a back panel box 102c. The front panel box 102b incorporates an operation panel 105, a control circuit board, a washing water level sensor, and the like, and the back panel box 102c incorporates a water supply electromagnetic valve and the like.
[0019]
The outer frame base 103 is a member in which a synthetic resin is molded into a shape in which the central portion of the bottom surface is opened. The outer frame base 103 is provided with drain hose lead-out holes (not shown) on the side surfaces and legs 104 at the four corners.
[0020]
The outer lid 2 is composed of a front member 202 and a rear member 203 which are joined by a hinge 201 so as to be folded into a mountain fold by folding a substantially central portion in the front-rear direction, and a hinge provided at a rear end portion of the rear member 203 It is attached to the upper cover 102 so as to open and close the clothes insertion opening 102a by turning around 204.
[0021]
The front member 202 is provided with a handle 202a at the rear end thereof for placing a finger when the outer lid 2 is folded in a mountain and opened. The rear member 203 is turned around the intake window 203a having a substantially semicircular shape formed by positioning a string along the fold side and a hinge 205 provided on the fold (string) side, and the intake member is turned. The intake window lid 206 includes an intake window lid 206 that opens and closes the window 203a. The intake window lid 206 includes a handle 206a for placing a finger on the rear end of the window 203a.
[0022]
The outer tub 3 is a water tub for storing washing water, and an outer tub cover 303 coupled to the opening end so as to form a ridge inside the drain opening 301 and the drive shaft through hole 302 formed at the bottom and the upper opening edge. And is suspended and supported by vibration-proof support devices (not shown) from the upper four corners of the side plate 101 so that the upper opening end is located directly below the clothing insertion port 102a.
[0023]
A drainage hose (not shown) is connected to the drainage port 301 via the drainage electric valve device 4, and is led out of the machine from a drainage hose lead-out hole provided in the outer frame base 103.
[0024]
As shown in detail in FIGS. 4 and 5, the drainage electric valve device 4 is pressed against the valve seat 402 by a push spring (third spring) 401 to close the drainage passage 403 connected to the drainage port 301 and the drainage hose. The valve body 404 is provided with a valve body 404, and the cam 406 is rotationally driven by a valve drive motor 405, and the valve body 404 is pushed by a valve operating rod 408 in which an elongated hole 408 a is engaged with an engagement pin 407 erected on the cam 406. The drainage passage 403 is opened by retreating against 401. The slot 408a of the valve operating rod 408 is a free relative that allows the cam 406 to rotate freely without applying a load that causes the engagement pin 407 to move the valve operating rod 408 against the push spring 401. Provide a movable range. Further, the cam 406 in the drainage electric valve device 4 is also used to generate a driving force for operating a slider in a clutch / detent device described later.
[0025]
The washing and dewatering tub 5 includes a substantially cylindrical body portion 501 made of stainless steel plate, a bottom portion 502 formed by molding synthetic resin, a metal coupling flange 503, a fluid balance ring 504, a washing water circulation duct 505, and a lint catcher. A collection filter 506 is provided.
[0026]
The body 501 in the washing and dewatering tub 5 includes a large number of dewatering holes 501a and a large number of protrusions 501b protruding inward so as to extend in the vertical direction. Further, the bottom 502 and the coupling flange 503 are integrally formed by insert molding and coupled to the lower end of the body 501. A number of drain holes (not shown) are formed in the coupling flange 503 in advance, and a number of drain holes (not shown) are formed in the bottom 502 at the time of molding.
[0027]
The fluid balance ring 504 is an annular member that encloses water therein, and is coupled to the upper end of the body 501. Although not shown in the drawings, the fluid balance ring 504 is preferably configured to support intake air in cold air drying by integrally forming intake blades.
[0028]
The washing water circulation duct 505 is attached along the inner surface of the body portion 501, the lower end is opened to receive the washing water pressurized by the back blades (described later) of the stirring blade, and the upper end is an intermediate portion of the body portion 501. The yarn waste collecting filter 506 is built in the opening.
[0029]
The drive mechanism 6 includes a transmission gear mechanism 601, a clutch / anti-rotation device 602, a washing drive motor 603, and a mounting base 604.
[0030]
The transmission gear mechanism 601 includes an inner peripheral side input shaft 607 in which the input gear 606 of the reduction gear mechanism 605 is formed at the inner end portion, an inner peripheral side output shaft 609 in which the inner end portion is coupled to the reduction output gear 608, The inner end of the outer peripheral side input shaft 607 is coupled to the outer peripheral side input shaft 610 provided on the outer periphery of the outer peripheral side input shaft 607, and the reduction gear case 611 coupled to the inner end of the outer peripheral side input shaft 610. An outer peripheral output shaft 612 provided on the outer periphery of the output shaft 609 so as to be relatively rotatable, and a transmission gear mechanism housing 615 that supports and includes the outer peripheral input shaft 610 and the outer peripheral output shaft 612 via bearings 613 and 614. Prepare.
[0031]
In this transmission gear mechanism 601, the transmission gear mechanism housing 615 is attached to a steel plate mounting base 604, and the output shaft side portion of the transmission gear mechanism housing 615 is fitted into the drive shaft through hole 302 of the outer tub 3 in a watertight state. The mounting base 604 is attached to the outside of the bottom of the outer tub 3 so that the inner peripheral output shaft 607 and the outer peripheral output shaft 612 protrude inside the bottom of the outer tub 3, and the outer peripheral output shaft 612 A coupling flange 503 of the washing and dewatering tub 5 is coupled to the outer end, and a stirring blade 7 described later is coupled to the outer end of the inner peripheral side output shaft 609.
[0032]
The transmission gear mechanism 601 decelerates the rotational force input to the inner peripheral side input shaft 607 and transmits it to the inner peripheral side output shaft 609, and the free rotational force input to the outer peripheral side input shaft 610 or The anti-rotation force is transmitted as it is to the outer peripheral side output shaft 612, and the rotational force input together to the inner peripheral side input shaft 607 and the outer peripheral side input shaft 610 is directly transmitted to the inner peripheral side output shaft 609 and the outer peripheral side output shaft 612. To do. The inner peripheral side input shaft 607 functions as a stirring blade driving shaft, and the outer peripheral side input shaft 610 functions as a washing and dewatering tub driving shaft.
[0033]
The clutch / anti-rotation device 602 is provided with a locking tooth portion 616a on the upper side thereof, a drive tooth portion 616b on the lower side portion thereof, and is not relatively rotatable with respect to the spline 610a formed on the outer circumference of the outer peripheral side input shaft 610. Rotating from a slider 616 engaged so as to be capable of swinging, a slider detent tooth portion 618 formed on a fixing member 617 attached to the lower end surface of the transmission gear mechanism housing 615, and a washing drive motor 603 The slider driving tooth member 620 positioned inside the driven pulley 619 that receives the driving force and coupled to the outer end of the inner peripheral input shaft 607 is compressed between the inner ring of the bearing 613 and the slider 616. A coil spring (first spring) 621 that interposes the drive tooth portion 616b with the slider drive tooth member 620 by interposing and pushing down the slider 616 toward the slider drive tooth member 620, and the like. The one end is opposed to the flange 616c of the slider 616 so that the slider 616 is pushed up against the coil spring 621, and the other end is opposed to the cam 406 of the drainage electric valve device 4. Attached to the operation lever support seat 622 formed on the member 617 so as to be capable of turning, the coil spring 621 is compressed and the slider 616 is pushed up to engage the locking tooth portion 616a with the non-rotating tooth portion 618. A slider operation lever 624 is provided which is provided with a turning force by a torsion spring (second spring) 623 in a matching direction (clockwise in FIGS. 2 and 4).
[0034]
The clutch / non-rotating device 602 configured in this manner pushes up the slider 616 by turning the slider operation lever 624 clockwise, thereby causing the locking tooth portion 616a to move to the slider rotation preventing tooth portion 618. Since the outer peripheral side input shaft 610 is locked, the locking force is transmitted to the outer peripheral side output shaft 612 to lock the washing / dehydrating tub 5 and the inner peripheral side input shaft 607 rotates. Is reduced by the transmission gear mechanism 601 and transmitted to the inner peripheral side output shaft 609 to form a rotation transmission system for rotating the stirring blade 7. Further, when the slider operation lever 624 is turned counterclockwise and the slider 616 is pushed down by the coil spring 621 to release the locking tooth portion 616a from the slider rotation stop tooth portion 618, the outer peripheral side input shaft Rotation transmission for releasing the lock of 610 to make the washing / dehydrating tub 5 freely rotatable and decelerating the rotation of the inner peripheral side input shaft 607 and transmitting it to the inner peripheral side output shaft 609 to rotate the stirring blade 7. Let the system form. Then, when the slider 616 is further pushed down to engage the driving tooth portion 616b with the slider driving tooth member 620, the inner peripheral side input shaft 607 and the outer peripheral side input shaft 610 are rotationally driven together to generate the rotational force. As it is, it is transmitted to the inner peripheral side output shaft 609 and the outer peripheral side output shaft 612 to form a rotation transmission system for integrally rotating the washing and dewatering tub 5 and the stirring blade 7.
[0035]
The cam 406 of the drainage motor operated valve device 4 facing the other end of the slider operating lever 624 pushes the slider 616 toward the slider driving member 620 by the extension of the coil spring 621, thereby driving the tooth portion 616b. Is engaged with the slider driving tooth member 620, and a ridge 406a that turns the slider operating lever 624 counterclockwise against the turning force of the slider operating lever 624 by the torsion spring 623. Then, the slider operation lever 624 is moved by the torsion spring 623 so that the slider 616 is pushed up against the extension force of the coil spring 621 and the locking tooth portion 616a is engaged with the non-rotating tooth portion 618 of the slider. A trough 406b is provided that allows the angle to be turned clockwise.
[0036]
The flat bottom of the valley 406b of the cam 406 is low enough to form a gap with the slider operation lever 624 that is turned clockwise by the torsion spring 623, as shown in FIG. As shown in (b), the flat top portion of the peak portion 406a forms a gap between the slider operating lever 624 and the flange portion 616c with the slider operation lever 624 away from the flange portion 616c of the slider 616. Thus, the slider operating lever 624 is formed at a height for turning. Thus, the configuration in which the gap is formed at one end of the slider operation lever 624 is effective for reducing the dimensional accuracy (processing accuracy and assembly accuracy) of the related components. Moreover, since the other end of the slider operation lever 624 in a state where a gap is formed at one end is pressed against the cam 406 or the slider 616 by the torsion spring 623, the slider operation lever 624 is free. No vibration or noise is generated.
[0037]
Further, the rotation angle at which the peak portion 406a and the valley portion 406b of the cam 406 are opposed to the slider operation lever 624, and the engagement pin 407 standing on the cam 406 are freely relative within the elongated hole 408a of the valve operation rod 408. The range of the range in which the slider can be moved is as follows: the slope of the valley between the valley 406b and the peak 406a where the cam 406 drives the slider operation lever 624 to turn, particularly the slider operation lever 624; On the inclined surface that is turned counterclockwise against the torsion spring 623, the engaging pin 407 moves freely in the long hole 408a, and the slider operation lever 624 is placed on the flat portion of the flat top of the cam 406. The engagement pin 407 applies an operating force to the valve operating rod 408 to move the valve operating rod 408 when the valve operating rod 408 is rotated to a position where the valve operating rod contacts.
[0038]
Such a free relative movable range by the long hole 408a of the valve operating rod 408 reduces an increase in the load of the valve drive motor 405 that rotationally drives the cam 406. That is, as shown in FIG. 8, when the rotation angle of the cam 406 is 0 (a), the engagement pin 407 is engaged with the rear portion of the elongated hole 408a of the valve operating rod 408, so that the valve body 404 is The drainage passage 403 is closed by being pressed by the pressing spring 401 and in pressure contact with the valve seat 402. At this time, since the bottom of the valley 406b of the cam 406 faces the slider operation lever 624, the slider operation lever 624 is turned clockwise by the torsion spring 623, and the slider 616 is rotated. Is pushed up against the coil spring 621 to engage the locking tooth portion 616a with the non-rotating tooth portion 618 of the slider so that the outer peripheral side input shaft 610 is prevented from rotating.
[0039]
When the cam 406 rotates and an inclined portion toward the peak portion 406 a acts on the slider operation lever 624, the cam 406 twists the slider operation lever 624 against the spring 623 and moves the slider operation lever 624. The slider is turned counterclockwise to lower the slider push-up position, and the slider 616 is allowed to be pushed down by the coil spring 621. When the slider 616 is pushed by the coil spring 621 and descends, the locking tooth portion 616a is detached from the slider rotation preventing tooth portion 618, and the outer peripheral side input shaft 610 is brought into a free rotation state. When the cam 406 further rotates and reaches a rotation angle at which the flat top portion of the peak portion 406 a acts on the slider operation lever 624, the slider operation lever 624 has the slider push-up position at the slider 616. It turns in the counterclockwise direction until it descends away from it, and the drive tooth portion 616b meshes with the slider drive tooth member 620 to rotate the inner peripheral side input shaft 607 and the outer peripheral side input shaft 610 together. . The driving load of the cam 406 in a state in which the inclined portion of the cam 406 acts on the slider operation lever 624 to drive the slider operation lever 624 by a turning angle has a magnitude for overcoming the torsion spring 623. However, when the flat top portion of the peak portion 406 a acts on the slider operation lever 624, the driving load acting on the cam 406 becomes a frictional force with the slider operation lever 624. During this time, the engagement pin 407 of the cam 406 freely moves relative to the inside of the long hole 408a of the valve operating rod 408 and does not move the valve operating rod 408, so that the valve drive load acts on the cam 406. There is no.
[0040]
When the rotation angle of the cam 406 reaches 90 degrees (b), the engagement pin 407 moves to the tip of the elongated hole 408a and pulls the valve operating rod 408 against the push spring 401 to retract (open) the valve body 404. Valve). As the rotation of the cam 406 progresses, the pulling operation amount of the valve operating rod 408 increases and the compression amount of the push spring 401 also increases, so the driving load of the cam 406 also increases. During this time, the slider operation lever 624 is in a state of acting on the flat top of the peak portion 406 a, so that the slider operation lever driving load acting on the cam 406 causes friction with the slider operation lever 624. It is power.
[0041]
When the rotation of the cam 406 further proceeds to a state (c) of 180 degrees, the opening degree of the valve body 404 is maximized. In this state, the cam 406 finishes the valve opening drive (compression operation of the push spring 401), so the valve body drive load becomes zero.
[0042]
When the rotation angle of the cam 406 exceeds 180 degrees, the drainage electric valve device 4 enters a valve closing drive state. In this valve closing drive state, the pulling force of the push spring 401 acts to accelerate the rotation of the cam 406 (minus drive load). When the valve body 404 is seated on the valve seat 402, there is no negative load acting on the cam 406 from the push spring 401, and the engagement pin 407 moves freely in the long hole 408 a of the operation rod 408.
[0043]
Thereafter, when the inclined portion from the peak portion 406 a to the valley portion 406 b of the cam 406 faces the slider operation lever 624, the cam 406 pushes the slider 616 up by the torsion spring 623. In this manner, it is allowed to turn in the clockwise direction, and the initial state (a) is restored while receiving acceleration force (minus driving load) from the torsion spring 623 via the slider operation lever 624.
[0044]
FIG. 8D shows the relationship between the rotation angle of the cam 406 and the driving load of the cam 406. The characteristic curve shown by the broken line shows the slider operation lever driving load characteristic and the characteristic shown by the solid line. A curve is a valve element drive load characteristic.
[0045]
In the washing drive motor 603, a reversible rotation type induction motor having a drive pulley 625 fitted to a rotation shaft is attached to the attachment base 604, and the drive belt 626 is wound around the drive pulley 625 and the driven pulley 619 to apply the rotational drive force to the driven pulley. 619 is transmitted to 619.
[0046]
The stirring blade 7 is a large-diameter dish-like member that is slightly smaller than the inner diameter of the body 501 of the washing and dewatering tub 5, and the surface of the stirring blade 7 has a central portion that is smoothly bent into a convex shape. Are smoothly bent in a concave shape, and the outer peripheral portion is bent so as to rise smoothly, and further, a stirring blade 701 is formed with ridges formed radially, and a large number of vent holes 702 are formed on the front and back sides from the middle to the outer peripheral portion. It is formed so as to penetrate in the direction, and a radial washing water circulation back blade 703 is formed on the back surface thereof. The agitation blade 7 is installed so as to be fitted to the inner peripheral side output shaft 609 of the drive mechanism 6 so as to be rotatable inside the bottom of the washing and dewatering tub 5.
[0047]
As shown in FIG. 6, in the control circuit of the electric washing machine, the operation panel 105 includes a power switch 1051, an input switch group 1052, and a display element group 1053. The input switch group 1052 includes a button switch group for setting various washing courses and a button switch group for setting various cold air drying courses, and the display element group 1053 displays the set washing courses and cold air drying courses and displays them. An indicator lamp group for displaying the progress state is provided.
[0048]
The main control circuit 8 includes a microcomputer 801 and a load driving device 802. When the power switch 1051 is turned on, the microcomputer 801 is activated to execute a control processing program, and from the input switch group 1052 on the operation panel 105. The washing course and the cold air drying course are set according to the input of, and referring to the water level detection signal output from the washing water level sensor 901, the water supply electromagnetic valve 902, the drainage electric valve device 4 and the washing drive motor 603 in the drive mechanism 6 are driven. Thus, the load driving device 802 is controlled to execute control of washing, dehydration, and cold air drying, and the display element group 1053 is controlled to be turned on / off so as to display the progress state.
[0049]
When the washing course is set, the microcomputer 1061 detects the amount of cloth / cloth quality, sets the amount of washing water / wash water flow, washing water supply, washing stirring, washing drainage, rinsing water supply, rinsing stirring, rinsing drainage, centrifugal dehydration washing Execute control processing.
[0050]
In the cloth amount / cloth quality detection, the valve drive motor 405 is set so that the valley 406a of the cam 406 of the drainage electric valve device 4 faces the slider operation lever 624 and the valve body 404 closes the drainage passage 403. To control. In this state, as shown in FIG. 4, the slider operation lever 624 is turned clockwise by the torsion spring 623, and the slider 616 is pushed up and meshed with the slider rotation stop tooth portion 618. This is a drive mode in which the washing and dewatering tub 5 is locked so as not to rotate by locking the outer peripheral side input shaft 610, and the rotation of the inner peripheral side input shaft 607 is decelerated and transmitted to the stirring blade 7.
[0051]
By rotating the washing drive motor 603 in this drive mode and driving the stirring blade 7, the rotational load (dry cloth load) acting on the stirring blade 7 is detected to detect the cloth amount, and the water supply electromagnetic valve 902 is further connected. After opening and supplying water to a predetermined water level, the washing drive motor 603 is rotated again to drive the stirring blade 7 to detect the rotational load (packing load) acting on the stirring blade 7. The cloth quality is detected with reference to the dry cloth load.
[0052]
In the washing water amount / washing water flow setting, the washing amount (water level) is set according to the cloth amount, and the washing water flow is set according to the cloth quality.
[0053]
In washing water supply, the water supply electromagnetic valve 902 is opened and water is supplied to the washing water level while referring to the detection signal of the washing water level sensor 901.
[0054]
In washing and agitation, the washing and dehydrating tub 5 is locked and the washing drive motor 603 reciprocally drives the agitating blade 7 to rotate and the washing and dehydrating tub 5 is allowed to rotate freely. Thus, the tank free washing in which the stirring blade 7 is driven to reciprocate is selectively executed. When tank washing is performed, the cam 406 of the drainage electric valve device 4 remains in the cloth amount / cloth quality detection. However, when performing free washing of the tank, the valve drive motor 405 of the drainage electric valve device 4 is operated to rotate the cam 406, and the slider 616 is pushed down by the coil spring 621 and descends. The slider operation lever 624 is turned counterclockwise against the torsion spring 623 so that the outer peripheral side input shaft 610 can be freely rotated by being released from the portion 618, and the inner peripheral side The drive mode is such that the rotation of the input shaft 607 is decelerated and transmitted to the stirring blade 7. In order to perform this bath free washing, in order to stably place the slider 616 at an intermediate position where the slider 616 does not mesh with any of the slider detent tooth portion 618 and the slider driving tooth member 620, A flat portion that stably stops the turning operation of the slider operation lever 624 may be provided in the middle of the inclined portion from the valley portion 406b toward the mountain portion 406a.
[0055]
In washing drainage, the valve drive motor 405 of the drainage electric valve device 4 is operated to further rotate the cam 406, the valve operating rod 408 is pulled, the valve body 404 is pulled away from the valve seat 402, and the drainage passage 403 is opened. At this time, since the angle is further turned in the counterclockwise direction, the slider 616 is pushed by the coil spring 621 and further lowered to engage with the slider driving tooth portion 620, and the outer peripheral side input shaft 610 is engaged. The driving form is such that the washing / dehydrating tub 5 and the stirring blade 7 are rotated together with the peripheral input shaft 607. Therefore, if necessary, the washing and dewatering tub 5 and the stirring blade 7 can be rotationally driven together to perform centrifugal dewatering.
[0056]
In the rinsing water supply, the valve drive motor 405 of the drainage electric valve device 4 is operated and the cam 406 is rotated until the valve body 404 comes into contact with the valve seat 402 and closes the drainage passage 403 to detect the cloth amount and the cloth quality. Make the same condition as washing and stirring. Thereafter, the water supply electromagnetic valve 902 is opened to supply rinsing water.
[0057]
Rinse stirring is performed in the same manner as washing stirring.
Rinsing drainage is performed in the same manner as washing drainage.
In centrifugal dewatering, the drainage valve device 4 is controlled in the same manner as washing drainage and rinsing drainage, and the washing drive motor 603 is continuously driven in one direction to rotate the washing / dehydration tank 5 and the stirring blade 7 integrally at high speed. Let
[0058]
The cold air drying course is set with the centrifugally dewatered laundry placed in the washing and dewatering tub 5 (or left in a disassembled state) and the intake window lid 206 opened. When this cold air drying course is set, the microcomputer 801 moves the washing and dewatering tub 5 and the stirring blade 7 while the cam 406 is rotated so as to open the drainage passage 403 of the drainage electric valve device 4. Cold air drying operation control is performed to rotate at a dewatering rotation speed (high speed of 870 to 950 rpm).
[0059]
When this cold air drying control is executed and the washing / dehydrating tub 5 and the agitation blade 7 rotate at high speed, the laundry also rotates integrally with these and the air in the state where the air in the washing / dehydrating tub 5 is in contact with the air. Moisture is efficiently evaporated into the air because of relative movement at a speed.
[0060]
Here, when the washing / dehydrating tub 5, the stirring blade 7 and the laundry rotate at high speed, the air in the washing / dehydrating tub 5 is swung by the frictional force between them, and the protrusions 401 b of the washing / dehydrating tub 5 Since the stirring blade 701 and the washing water circulation back blade 703 of the stirring blade 7 rotate at high speed and function as a centrifugal blower impeller, the inner peripheral edge of the washing / dehydration tub 5 is swung while the air in the washing / dehydration tub 5 is swirled. And then overflows from the upper edge and flows into the outer tub 3, blows out into the outer tub 3 from the dewatering hole 501 a, and is drawn by the washing water circulation back blade 703 of the stirring blade 7 from the ventilation window of the stirring blade 7. After moving to the back side of the stirring blade 7, it is blown out from the gap between the outer peripheral edge of the stirring blade 7 and the inner peripheral surface of the washing / dehydrating tub 5 to the inner peripheral edge of the washing / dehydrating tub 5 and through the washing water circulation duct 505. It blows out to the inner peripheral edge in the cum dewatering tank 5, and further Blown into the outer tub 3 from and drain hole in the bottom of the dewatering tank 5.
[0061]
A part of the air blown into the outer tub 3 flows out of the machine through the drainage electric valve device 4 and the drainage hose from the drain outlet 301 opened at the bottom, and the other part is the outer tub. 3 rises along the inner wall 3 and flows into the outer frame 1 from the edge of the outer tub cover 303.
[0062]
The air that has flowed into the outer frame 1 in this manner descends the gap between the outer tub 3 and flows out of the machine from the lower side of the outer frame base 103.
[0063]
In this way, in order to improve the flow of air that the air in the washing and dewatering tub 5 evaporates moisture from the laundry and flows out of the machine, new air is efficiently introduced into the washing and dewatering tub 5 from outside the machine. It is necessary to supply air. When the air in the washing / dehydrating tub 5 flows out, the central portion of the washing / dehydrating tub 5 is in a negative pressure state. Therefore, the intake window opened above the central portion of the washing / dehydrating tub 5 is opened. New air outside the machine flows in from 203a and can efficiently flow (supply) into the center of the washing and dewatering tub 5.
[0064]
According to such cold air drying, an air intake flow rate of 2 to 3 cubic meters / minute can be generated to achieve cold air drying with a dryness of about 102%. In addition, this cold air drying does not exacerbate the living environment by blowing hot air that is wet like hot air drying, and does not cause heat shrinkage of the laundry.
[0065]
The cold air drying course is configured such that a 3-hour course, a 2-hour course, a 90-minute course, a 60-minute course, and a 30-minute course can be set by operating the input switch group 1052 on the operation panel 105.
[0066]
【The invention's effect】
The present invention locks the shaft for driving the washing and dewatering tub to prevent rotation. In this state, the agitating blade drive shaft is driven to rotate to perform fixed washing of the tub, while the washing / dehydrating tub driving shaft is made to rotate freely, the agitating blade drive shaft is driven to rotate and the tub free washing is performed. A shaft for driving the dehydration tank Rotation drive integrated with the stirring blade drive shaft Then dehydrate Thus, it is possible to prevent vibration of the lever mechanism that operates the slider in the clutch / detent device that achieves the drive mode switching function and to simplify the structure.
[0067]
In addition, the operation lever forms a gap with the slider when it is turned by the top of the crest of the cam, and between the bottom when it is turned so as to face the bottom of the valley. By configuring so as to form the gap, the dimensional accuracy of the related components can be relaxed.
[0068]
Further, the driving force for driving the lever mechanism is obtained from the valve drive motor of the drainage electric valve device, and the increase in the drive load of the valve drive motor is reduced by changing the valve opening and drive timing. Can do.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of an electric washing machine showing an embodiment of the present invention.
2 is an enlarged vertical side view of a bottom of a washing and dewatering tub located at the bottom of an outer tub, an agitation blade, and a clutch / rotation prevention device in the electric washing machine shown in FIG. 1;
FIG. 3 is a bottom view of the electric washing machine shown in FIG. 1 with a part cut out of a drive motor, a clutch / rotation prevention device, and a drainage electric valve device located at the bottom of the outer tub.
4 is a longitudinal side view showing a clutch / detent device and a drainage electric valve device in the washing process of the electric washing machine shown in FIG.
FIG. 5 is a longitudinal side view showing a clutch / detent device and a drainage electric valve device in a dehydration process of the electric washing machine shown in FIG.
FIG. 6 is a control circuit diagram in the electric washing machine shown in FIG. 1;
7 is a schematic diagram showing the relationship between a slider, an operating lever, and a cam in a drainage electric valve device in the clutch / non-rotation device of the electric washing machine shown in FIG. 1 in a washing step (a) and a dehydration step (b). It is.
8 is a schematic diagram (a) to (c) showing a positional relationship among a valve body, an operation rod, a cam, and an operation lever and a cam in a clutch / rotation prevention device in the drainage electric valve device of the electric washing machine shown in FIG. FIG. 6D is a drive load characteristic diagram (d) acting on the cam.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 4 ... Drain electric valve apparatus, 401 ... Push spring, 403 ... Drain passage, 404 ... Valve body, 405 ... Valve drive motor, 406 ... Cam, 407 ... Engagement pin, 408 ... Valve operating rod, 408a ... Long hole, 5 DESCRIPTION OF SYMBOLS Washing and dewatering tank, 6 ... Drive mechanism, 601 ... Transmission gear mechanism, 602 ... Clutch / detent device, 603 ... Washing drive motor, 607 ... Inner peripheral side input shaft, 609 ... Inner peripheral side output shaft, 610 ... Outer periphery Side input shaft, 612 ... Outer peripheral side output shaft, 616 ... Slider, 618 ... Slider detent tooth, 621 ... Coil spring, 623 ... Torsion spring, 624 ... Slider operation lever, 7 ... Stirring Wings.

Claims (2)

Through a clutch / non-rotating device provided with a slider operated by a slider operating lever, which is rotatably provided in the outer tub and rotatably provided with a washing / dehydrating tub and a stirring blade, and is driven by a cam of the drainage electric valve device In the electric washing machine that transmits the rotation of the washing drive electric motor to the washing / dehydrating tub and / or the stirring blade, and locks the rotation of the washing / dehydrating tub to prevent rotation.
The clutch / detent device presses the slider engaged with the washing / dehydrating tub driving shaft to be engaged with the stirring blade driving shaft by the first spring, and the slider operating lever is The slider is moved against the first spring and biased by the second spring so as to be locked to the detent portion,
In the drainage electric valve device, the slider operating lever is moved in such a direction as to allow the cam to operate the valve body so that the slider is moved to engage with the stirring blade driving shaft by the first spring. Configured to turn against the second spring,
The slider operating lever forms a gap with the slider when turned by the top of the crest of the cam, and contacts the bottom when turned so as to face the bottom of the valley. Configured to form a gap between them,
The clutch / non-rotating device is either in a state in which the washing / dehydrating tub is locked or freely rotated by the position of the slider moved by the slider operating lever turned by the cam. An electric washing machine characterized in that, in a state where the state is selected, the rotation of the washing drive motor is transmitted to the agitating blade to select the tank fixed washing and the tank free washing for rotating the stirring blade. A washing / driving motor is provided via a clutch / non-rotating device in which a washing / dehydrating tub and a stirring blade are rotatably provided in the outer tub, and the slider is operated by a slider operating lever driven by a cam of the drainage electric valve device. In the electric washing machine that transmits the rotation of the washing / dehydrating tub and / or the stirring blade to lock the washing / dehydrating tub and prevent it from rotating,
The clutch / detent device presses the slider engaged with the washing / dehydrating tub driving shaft to be engaged with the stirring blade driving shaft by the first spring, and the slider operating lever is The slider is moved against the first spring and biased by the second spring so as to be locked to the detent portion,
The drainage motor-operated valve device connects an operation rod for opening the valve element biased to close the drainage passage by a third spring and a cam so as to have a freely movable relative range. The slider operating lever in a direction allowing the slider to move so as to engage with the stirring blade driving shaft by the first spring in a rotation region within a freely movable range of the cam. Is configured to turn against the second spring,
The slider operating lever forms a gap with the slider when turned by the top of the crest of the cam, and contacts the bottom when turned so as to face the bottom of the valley. Configured to form a gap between them,
The clutch / non-rotating device is either in a state in which the washing / dehydrating tub is locked or freely rotated by the position of the slider moved by the slider operating lever turned by the cam. An electric washing machine characterized in that, in a state where the state is selected, the rotation of the washing drive motor is transmitted to the agitating blade to select the tank fixed washing and the tank free washing for rotating the stirring blade.

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