JP2019063605A - Electric washing machine - Google Patents

Abstract

To provide an electric washing machine in which a lid body rotates in an opening direction when fully opened and in a closing direction when fully closed.SOLUTION: The electric washing machine includes: a top cover 4 placed on an upper part of a washing machine body 1; a lid body 5 supported pivotally around a lid body support shaft 6 between a fully open position and a fully closed position in a rotatable manner on a top surface of the top cover 4; and lid springs 55a, 55b for energizing the lid body 5 in an opening direction. In a fully closed position of the lid body 5, a force in an opening direction generated from the lid springs 55a, 55b is smaller than a force in a closing direction generated by self-weight of the lid body 5. At a predetermined angle in the middle of the opening/closing operation of the lid body 5, the force in the opening direction generated from the lid springs 55a, 55b and the force in the closing direction generated from the self-weight of the lid body 5 are balanced. When an open angle of the lid body 5 is smaller than the predetermined angle, the lid body 5 rotates in the closing direction and rotates to the fully closed position, and when the open angle of the lid body 5 is larger than the predetermined angle, the lid body 5 rotates in the opening direction and rotates to the fully open position.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an electric washing machine for washing clothes.

  In a so-called vertical washing machine in which the water tank is rotated about a vertical axis and the upper side is opened and the laundry is taken in and out, the rotor is provided on the bottom and washing is performed by rotating the rotor and the water tank.

  The lid for taking in and out the laundry is pivotally supported openably and closably by a hinge which is a rotating shaft provided on the back side with respect to the user with respect to the top cover provided on the upper portion of the washing machine main body. Can be opened by lifting the front edge. The lid is divided into a front side and a back side, and there is an integral type in which the entire body is opened as a unit. There are patent documents 1-3 as a prior art concerning this integral method.

In Patent Document 1, “a top cover placed on the upper portion of the washing machine main body, a lid pivotally supported openably and closably by a lid hinge shaft above the top cover, and a predetermined angle during opening and closing rotational motion of the lid , A toggle spring for switching the biasing force in the opening direction or the closing direction, a lid spring for biasing the lid to the opening side, a spring shaft for supporting the lid spring, and the rotation of the lid A rotary shock absorbing damper, a damper holder for rotatably and slidably storing the shock absorbing damper, and a planar shape for supporting the lid body and lid outer peripheral portion of the transparent member constituting the lid from below A cover bottom frame of a substantially donut shape, a cover reinforcing plate of the cover lower frame, and a space portion at the rear of the cover formed by attaching the cover lower frame to the cover; The spring shaft, the shock absorbing damper, the damper holder, the lid supplement A plate or the like is internally provided in the space to unite the lid unit, and the lid reinforcing plate is formed of a thin steel plate and attached to the lid lower frame formed of a plastic material with a plurality of tapping screws There is disclosed a lid structure of a washing machine which is fixed and sandwiching and fixing the damper holding body with the lid lower frame. (Claim 1)
In Patent Document 2, “the top cover placed on the upper portion of the washing machine main body, the lid disposed on the top cover so as to be openable / closable upward, and the angle of the lid during the opening operation from the closed state of the lid are A toggle spring which is biased in the opening direction when reaching a predetermined angle, and biased in the closing direction when the angle of the lid reaches the predetermined angle during the closing operation from the open state of the lid; A lid spring for urging the lid toward the opening side, and a rotary type shock absorbing damper for damping the rotation of the lid by the viscosity of the enclosed oil, wherein the shock absorbing damper can be pivoted and slidable And the damper holder is fixed to the lid, the damper shaft of the shock absorbing damper is held non-rotatably on the top cover, and the damper holder and the shock absorber The damper has a predetermined angle in the rotational direction When the lid is opened, the damping force of the shock absorbing damper is not applied to the rotation of the lid at the beginning of the opening operation, and the spring force of the toggle spring is the lid. The damping force of the shock absorbing damper is applied during the period from when the lid is biased to the opening direction until the lid is opened, and when the lid is closed from the opening, at the beginning of the closing operation After the damping force of the shock absorbing damper does not act on the turning of the lid by play, the lid is closed after the spring force of the toggle spring biases the lid in the closing direction. There is disclosed a lid structure of a washing machine configured to apply the damping force of the shock absorbing damper to the entire interval. (Claim 1)
In Patent Document 3, “the top cover placed on the upper portion of the washing machine main body, the lid disposed on the top cover so as to be openable / closable upward, and the opening direction at a predetermined angle during the opening / closing operation of the lid” Alternatively, the shock absorbing damper includes: a toggle spring that switches an urging force in a closing direction; a lid spring that biases the lid toward the open side; and a rotary type shock absorbing damper that damps rotation of the lid. Is housed in a damper holder that is rotatably and slidably installed, the damper holder is fixed to the lid, and a damping force is added to the rotation of the lid when the lid is opened and closed. And the cover spring, the spring shaft for supporting the cover spring, the shock absorbing damper, the damper holder, and the like inside the space at the rear of the cover. Configuring the lid body as the top cover When the cover is attached to the cover, the cover is in an open state and in a free state where there is no biasing force of the cover spring, and one end of the cover spring is extended below the cover, and The end of the lid spring is inserted into the lid spring insertion hole formed in the top cover from a substantially vertical direction and engaged, and the lid is opened in the open state and in the free state without the biasing force of the lid spring There is disclosed a lid structure of a washing machine attached to a top cover and configured to be able to open and close the lid. (Claim 1)

Patent No. 4462362 Patent No. 4513877 Patent No. 4605234 gazette

  However, the configurations described in Patent Document 1 to Patent Document 3 require a toggle spring that switches the biasing force in the opening direction or the closing direction at a predetermined angle during the opening / closing operation of the lid.

  Then, an object of this invention is to provide the washing machine which can switch the urging | biasing force to an opening direction or a closing direction, without using a toggle spring.

  In order to achieve the above object, according to the present invention, a top cover placed on an upper portion of a washing machine body, and a top surface of the top cover, is pivoted about a lid support shaft between a fully open position and a fully closed position. And a lid spring for urging the lid in the opening direction, wherein the lid spring is opened in the opening direction generated from the lid spring at a predetermined angle during the opening / closing operation of the lid. The force and the force in the closing direction generated by the weight of the lid are balanced, the opening angle of the lid is 0 ° when the lid is horizontal, and the opening angle of the lid is 90 when the lid is vertical. When the opening angle of the lid is smaller than the predetermined angle, the lid is rotated in the closing direction to the fully closed position, and the opening angle of the lid is the predetermined angle. When the lid is larger than the above-mentioned angle, the lid pivots in the opening direction to the fully open position, and the lid When the cover is fully closed, the opening angle of the lid is a negative angle, and the force in the closing direction generated by the weight of the lid is larger than the force in the opening direction generated from the lid spring.

  According to the present invention, the biasing force in the opening or closing direction is set at a predetermined angle during the opening / closing operation of the lid by balancing the spring force of the lid spring and the weight of the lid without using the toggle spring. It can be switched. That is, the spring force of the lid is opened above a predetermined angle, and the lid is closed by its own weight below a predetermined angle.

The perspective view of the electric washing machine which concerns on the 1st Embodiment of this invention is shown. It is a perspective view of the electric washing machine which concerns on the 1st Embodiment of this invention, and shows the state which opened the cover body. The top view of the electric washing machine which concerns on the 1st Embodiment of this invention is shown. The AA sectional drawing of FIG. 3 of the electric washing machine which concerns on the 1st Embodiment of this invention is shown. It is a perspective view of a lid of an electric washing machine concerning a 1st embodiment of the present invention. It is BB sectional drawing of FIG. 3 along the rotating shaft of the cover body of the electric washing machine which concerns on the 1st Embodiment of this invention. It is CC fragmentary sectional view of FIG. 6 which shows the supporting point vicinity of the cover body of the electric washing machine which concerns on the 1st Embodiment of this invention, (a) is an open state of a cover body, (b) is a cover body Indicates a closed state. It is the DD fragmentary sectional view of FIG. 6 which shows the fulcrum vicinity of the cover body of the electric washing machine which concerns on the 1st Embodiment of this invention. It is an exploded perspective view showing attachment operation of a lid of an electric washing machine concerning a 1st embodiment of the present invention. It is the EE partial cross section figure of FIG. 9 which shows attachment operation of the cover body of the electric washing machine which concerns on the 1st Embodiment of this invention. It is a schematic diagram which shows the relationship between the opening angle of the cover body of 1st Embodiment of this invention, dead weight, and opening force. It is a block diagram of a control part of an electric washing machine concerning a 1st embodiment of the present invention. It is a flowchart which shows the basic control processing program of the electric washing machine which concerns on the 1st Embodiment of this invention.

  Hereinafter, an example of the mode for carrying out the present invention (hereinafter, referred to as “embodiment”) will be described in detail with reference to the drawings as appropriate. In each of the drawings, the same reference numerals are given to the common parts, and the duplicated explanation is omitted. Moreover, in the following description, the directions of the top, bottom, left, right, and front are based on the directions of top, bottom, left, right, and front shown in FIG.

  The so-called vertical electric washing machine in the present embodiment is to wash and dry clothes with the following configuration.

  A water tank rotatably supported is provided coaxially with the outer tank in an outer tank for storing washing water, and a rotary wing provided with irregularities on the upper surface is rotatably provided on the bottom surface of the water tank. The rotor and the water tank are configured to be selectively rotationally driven by drive means such as a motor.

  Furthermore, a detergent supply means for supplying water to the detergent inlet and introducing the detergent input to the bottom of the outer tank while melting the detergent input to the detergent inlet, a water supply means for supplying water into the outer tank, and wash water in the outer tank Drainage means for draining the washing machine out of the washing machine, washing water circulating means for drawing up the washing water at the bottom of the outer tub and dropping down on the laundry from the upper part of the water tank, and water-removal dehumidification taking in the high humidity air inside the outer tub After that, the dehumidifying device which heats and blows low humidity air into the water tank to dry the laundry, the driving device, the water supplying device, the drainage device, the washing water circulating device, and the dehumidifying device; And control means for driving and controlling the

  And, the control means controls the washing and drying process as follows.

  In the washing process, the detergent supplied to the bottom of the outer tank is dissolved by supplying water into the outer tank to produce a high concentration detergent solution. The detergent solution of high concentration is circulated from the top of the water tank to the laundry by the washing water circulating means, and the friction force or unevenness generated between the rotor and the laundry by rotating the rotor forward and reverse The laundry is washed by a component in the vertical direction and agitation of the washing water.

  In the rinsing step, the washing water is drained and then the tap water is supplied, and the tap water is circulated from the top of the water tank to the laundry by the washing water circulating means, and the rotor is rotated forward and reverse. The component of the vertical direction generated by the frictional force or unevenness generated between the laundry and the washing water is stirred, and the detergent components attached to the laundry are extruded and rinsed.

  Then, in the drying step, while rotating the rotor forward and reverse, the high humidity air inside the outer tub is sucked out, water cooled and dehumidified and then heated, and it is blown again into the outer tub and circulated to dry the laundry. Let

  FIG. 1 is a perspective view showing the appearance of an electric washing machine according to an embodiment of the present invention, showing a state in which a lid is closed, and FIG. 2 shows a state in which the lid can be opened to put laundry in and out. There is. FIG. 3 is a top view showing the appearance of the electric washing machine, and FIG. 4 is a longitudinal sectional view showing the internal structure, showing an AA cross section in FIG.

  The top cover 4 which forms the upper part of the washing machine main body 1 is provided with the laundry input port 3 which is an opening on the upper surface at the upper part of the square cylindrical casing 2 which forms the outer shell of the washing machine main body 1 There is. The top cover is made of, for example, ABS (acrylonitrile butadiene styrene) resin or PP (polypropylene) resin.

  A lid 5 that can be opened and closed along the lid support shaft 6 is provided on the top surface of the top cover 4 so as to cover the laundry inlet 3. The lid 5 is a substantially rectangular thin plate having a front side, a rear side, a right side and a left side. The lid support shaft 6 is provided along the rear side of the lid 5, and along the front side of the lid 5, a handle portion 7 is provided for the operator to apply fingers.

  The rear of the top cover 4 relative to the lid 5 is covered by a back cover 4a.

  A lock receiving recess 8 is opened on the right front side of the laundry inlet 3 of the top cover 4. Locking means 9 are provided adjacent to the lock receiving recess 8. The lock means 9 causes the rod 9a movably supported in the left-right direction to protrude or retract into the lock receiving recess 8 by a drive source such as a solenoid or a motor (not shown) in response to an instruction from the control means.

  The lid 5 is provided with a lock receiving protrusion 11 provided with a lock receiving hole 10 to which the rod 9a can be inserted. The lock receiving projection 11 is inserted into the inside of the lock receiving recess 8 when the lid 5 is closed, and the rod 9a fits into the lock receiving hole 10 if the locking means 9 acts, and the lid 5 does not open. Is configured to be locked.

  On the left end side of the front side of the top cover 4 is provided a detergent case 13 which is a concave portion covered by the openable detergent case cover 12 and is divided into a detergent feeding chamber, a softener feeding chamber, and the like. The user opens the detergent case cover 12 and then loads a predetermined amount of powder detergent, liquid detergent or softener into the detergent case 13.

  The detergent case 13 is connected to the detergent / softener inlet 14, and supplies the detergent and the softener into the outer tank 15.

  A water supply port 16 connected via a water supply and a hose (not shown) is provided on the upper surface of the top cover 4 behind the rear side of the lid 5. A water supply solenoid valve 17 is connected to the water supply port 16 to supply water according to an instruction of the control system. As an example, to explain the quadruple valve that supplies water in four directions as the water supply solenoid valve 17, the first is a washing water supply solenoid valve, which is connected to the water supply inlet to supply water into the water tank 18. The second one is a detergent water supply solenoid valve, which is connected to the detergent input chamber of the detergent case 13. The third is a softener water supply solenoid valve, which is connected to the softener charging chamber of the detergent case 13. The fourth is connected to the dehumidifying mechanism 19.

  An operation panel 20 is provided along the front side of the top cover 4 and has a power switch, operation buttons for selecting a process such as washing or drying, or setting a washing time, and further, for example, a liquid crystal or a light emitting element Display means are provided.

  The outer tub 15 for storing the washing water is anti-vibration supported to be located at the center of the housing 2 by a suspension rod 21 suspended from four corners of the upper surface of the housing 2 and provided with a spring and a damping means. A water tank 18 for washing and dewatering is rotatably provided inside the tank 15, and a rotary wing 22 is rotatably provided on the bottom surface of the water tank 18.

  The outer wall surface and the bottom surface of the water tank 18 are provided with through holes 18 a and 18 b for water flow and ventilation, and the outer periphery of the opening at the upper end of the water tank 18 is a fluid balancer 23 are provided.

  Irregularities are provided on the upper surface of the rotary wing 22 to agitate the washing water and apply a component force in the vertical direction or rotational direction to the laundry loaded on the upper surface of the rotary wing 22 to wash the laundry. The water tank 18 and the rotary wings 22 are selectively rotationally driven by the electromagnetic control clutch 25 via a reduction mechanism from a drive mechanism 24 which is a drive mechanism, for example, an inverter type. That is, by controlling the drive motor 24 and the electromagnetic operation clutch 25, the washing drive mode in which the rotary wing 22 repeats forward and reverse rotation while the water tank 18 is freely released or freely released is controlled; It is possible to switch between the dewatering drive mode in which the blade 22 and the blade 22 rotate continuously in the same direction as one unit.

  An air trap 26 is provided on the bottom surface of the outer tank 15, and the internal pressure is transmitted to the water level sensor 27 via a tube to detect the water level of the washing water in the outer tank 15.

  A vibration sensor 28 is provided on the outer side surface of the outer tank 15 to detect the vibration of the outer tank 15 during washing or dewatering.

  The upper surface of the outer tank 15 is covered with a tank cover 29. The laundry inlet 3 is opened in a range of about 2/3 from the front side of the tank cover 29 and is covered by the inner lid 30. The inner lid 30 is rotatably supported around a hinge 31 provided at the rear of the inner lid 30, and by lifting the handle 71, the lock (not shown) of the inner lid 30 is released and opened. . When the handle portion 71 is pushed downward after the inner lid 30 is closed, the inner lid 30 is locked.

  A hot air outlet 32, a water supply inlet 33, and a circulating water inlet 34, which communicate with the lower surface of the upper surface of the tank cover 29, are provided on the rear surface side of the tank cover 29. A detergent / softener inlet 14 is provided on the front side of the tank cover 29.

  A water flow vent 35 is opened at the bottom of the outer tank 15 and is connected to a hot air outlet 32 provided on the upper surface of the outer tank 15 via a drying duct 36. In the middle of the drying duct 36, a blower fan 37, a heater 38, a lint filter 39, a dehumidifying mechanism 19, and a temperature sensor 40 are provided. When the blower fan 37 is energized and rotated, and the heater 38 is energized and heated, warm air is blown into the water tank 18 to heat the laundry and evaporate the water. The air, which has become hot and humid, passes through the through holes 18a and 18b of the water tank 18 into the outer tank 15 and flows into the drying duct 36 through the water flow vent 35. The water is dewatered by the cooling water flowing in the dehumidifying mechanism 19 and is reheated by the heater 38 to become dry warm air, and the air is blown again into the water tank 18 from the warm air outlet 32 and circulated.

  The bellows pipes 41a, 41b, 41c, 41d, 41e made of rubber are provided with the outer tank 15 and the tank cover 29 which are displaced by vibration, the water supply solenoid valve 17 provided in the fixed case 2 and the top cover 4 and the like and the drying. It is used for connection with the duct 36, the circulation pump 42 and the like.

  A circulation pipe 43 is connected between the water flow vent 35 provided on the bottom of the outer tank 15 and the circulating water inlet 34 provided on the top rear of the tank cover 29. In the middle of the circulation pipe 43, a circulation pump 42 provided in the vicinity of the bottom of the washing machine body 1 and a foreign matter trap 44 for collecting foreign matter contained in the circulating water are provided. Is connected.

  When the circulation pump 42 is operated, the washing water in the outer tub 15 passes from the water flow vent 35 at the bottom of the outer tub 15 through the circulation pipe 43 and passes through a lint filter (not shown) to remove lint, and then the nozzle It is sprayed into the water tank 18 from 47.

  Next, the structure of the lid 5 and the lid support shaft 6 will be described with reference to FIGS. 5 to 8.

  FIG. 5 is a perspective view of the opened lid 5 as viewed from the inside, and shows the cover in the vicinity of the lid support shaft 6 in a transparent manner so that the structure of the lid support shaft 6 can be understood. Since the notation of upper, lower, left, right and front in the drawing indicates the direction of the washing machine main body, in the state of FIG.

  FIG. 6 is a cross-sectional view taken along the line B-B in FIG. 3 and shows the structure of the lid support shaft 6.

  7 is a cross-sectional view taken along the line C-C in FIG. 6, in which (a) shows the open state of the lid 5 and (b) shows the closed state of the lid 5.

FIG. 8 is a cross-sectional view taken along the line D-D in FIG. 6 and shows the lid 5 in an open state.
The lid 5 has a substantially left-right symmetrical shape, and a pair of components such as a spring and a damper are provided in left-right symmetry, so that a is added to the right component and b is added to the left component.

  The lid 5 is provided with a lid lower surface cover 49 made of resin so as to cover the lower surface of the lid glass 48 having a substantially quadrilateral shape, and the end surfaces of the front side, the left side and the right side. A lid rear surface cover 50 is provided along the rear side of the lid glass 48 so as to cover the rear side of the lid glass 48 from the lower surface to the upper surface. Furthermore, a lid hinge cover 51 whose width in the left-right direction is narrower than the lid lower surface cover 49 is provided so as to cover the lower surface of the lid supporting shaft 6 of the lid glass 48.

  On the lower surface of the lid lower surface cover 49, for example, a rigid reinforcing bracket 52, which is a sheet metal part obtained by bending an iron plate, is provided, and is fastened by a screw 66 to a boss 53 embedded integrally with the lid lower surface cover 49. Be done. A part of the reinforcing metal fitting 52 is bent in a direction away from the lid glass 48 at a right angle and orthogonal to the rotation axis of the lid support shaft 6, and a pair of left and right The through holes of the support shafts 54a and 54b are provided. The pair of left and right support shafts 54 a and 54 b are attached to the reinforcing metal fitting 52 in a state of passing through the coil-shaped lid springs 55 a and 55 b, respectively, and become rotation shafts of the lid support shaft 6.

  A hinge having an inner side surface, an outer side surface, and a lower surface, in a range which is inward of the left and right side surfaces of the lid 5 and outside the side surface of the lid hinge cover 51. Metal fittings 56a, 56b are provided. The through holes of the support shafts 54a and 54b and the spring receiving holes 67a and 67b are respectively provided through the inner side surface and the outer side surface of the hinge fittings 56a and 56b.

  Support shafts 54a and 54b are respectively supported by the inner side surface and the outer side surface of the pair of left and right hinge fittings 56a and 56b in a penetrating manner, and the lower surface is provided in recessed portions 57a and 57b provided in the vicinity of the left and right side surfaces of the top cover 4. On the other hand, they are fastened and fixed by screws.

  The first extending portions 58a and 58b, which are one end of the pair of lid springs 55a and 55b, which are torsion springs having a coil portion, are one end of the springs on the side close to each other in the direction of the front side of the lid 5, respectively. It is extended | stretched and contact | abuts in the direction which gives the torque of the opening direction to the cover 5 with respect to the reinforcement fitting 52 from the lower surface side of the cover 5. As shown in FIG. On the other hand, the other ends of the pair of lid springs 55a and 55b facing outward are extended in a direction away from the central axis of the coil portion of the lid springs 55a and 55b, and then parallel to the central axis of the coil A second extending portion 59a, 59b bent in a direction away from the coil portion is provided. The second extending portions 59a, 59b extend outward along the support shafts 54a, 54b. The second extension portions 59a, 59b penetrate both side surfaces of the inner side surface and the outer side surface of the hinge fitting 56a, 56b in the spring receiving holes 67a, 67b opened at positions different from the support shafts 54a, 54b, It is supported by two points.

  Since the second extension parts 59a, 59b are configured to be supported at two points through both side surfaces of the inner side surface and the outer side surface of the hinge fitting 56a, 56b, the lid spring 55a, by the opening and closing operation of the lid 5. Even when a twisting torque is applied to 55b, the second extending portions 59a and 59b are stably supported at two points while maintaining parallel to the support shafts 54a and 54b. Therefore, the spring constants of the lid springs 55a and 55b are stabilized regardless of the load, and the second extension portions 59a and 59b are not deformed excessively to cause excessive stress, so that the reliability is high. There is.

  The second extension portions 59a, 59b of the lid springs 55a, 55b are fixed to the top cover 4 via the hinge fittings 56a, 56b, and the first extension portions 58a, 58b of the lid springs 55a, 55b are reinforced. The cover 5 is provided on the cover 5 via the fitting 52, so that the cover 5 is configured to receive rotational torque in the direction to open the cover 5 around the support shafts 54a and 54b by the cover springs 55a and 55b.

  A pair of rotation dampers 60a and 60b are provided coaxially with the support shafts 54a and 54b and in proximity to the left and right centers of the lid 5, inside the support shafts 54a and 54b. The rotary dampers 60a and 60b enclose, for example, silicone grease having a high viscosity between the damper main bodies 61a and 61b and the damper shafts 62a and 62b rotatable in a range of a predetermined angle to generate viscous resistance torque. It is a structure. The damper main bodies 61a and 61b are provided on bosses provided on the lid lower surface cover 49 so as to rotate integrally with the lid 5, through damper stopper portions 69a and 69b extending in a direction away from the rotary shafts from the damper main bodies 61a and 61b. It is tightened with a screw 66 and attached. The damper shafts 62a and 62b have, for example, a substantially oval cross-sectional shape in which two opposing surfaces of the cylindrical surface are scraped off in a plane.

  One of the pair of rotary dampers 60 a and 60 b is a first damper 60 a that produces a viscous drag when the lid 5 is opened, and the other is a second damper that creates a viscous drag when the lid 5 is closed In the case of 60b, the viscosity resistance due to the rotation damper 60a or the rotation damper 60b is generated at any time of the opening operation and the closing operation of the lid 5. In particular, even when the lid 5 has a lid glass 48 and has a large mass compared to the lid 5 made of resin, the damping by the rotary dampers 60a and 60b is in the entire range of the opening and closing operation. Since the lid 5 can be opened and closed at a low speed and the lid 5 does not close rapidly or suddenly open near the full opening, smooth and stable opening and closing of the lid 5 is realized It is preferable because it can be done.

  Furthermore, the viscosity resistances of one rotation damper 60a and the other rotation damper 60b may not be the same.

  A damper receiving portion 63 extended upward to a position coaxial with the lid support shaft 6 is provided at the left and right center portions of the top cover 4 so as to prevent the substantially oval damper shafts 62a and 62b from rotating relative to each other. To fit. The details of the configuration of the damper receiving portion 63 and the damper shafts 62a and 62b will be described later.

  Since the damper shafts 62a and 62b of the pair of rotary dampers 60a and 60b are disposed close to each other so as to face each other toward the left and right center of the lid 5, only one pair of damper shafts 62a and 62b is provided in the left and right center portions It is the structure which can be fitted with two damper receiving parts 63. Therefore, the lid 5 is supported at three positions, ie, the hinge fittings 56a and 56b at the left and right ends and the damper receiving portion 63 at the central portion, so that the accuracy of the rotation axis of the lid support shaft 6 can be easily obtained. Since deflection and deformation of the body 5 are also less likely to occur, there is an effect that the opening / closing operation of the lid 5 is stabilized.

  Next, with reference to FIGS. 9 to 10, the procedure for attaching the lid 5 to the top cover 4 will be described with reference to FIGS. 2, 5 and 8 as appropriate.

  FIG. 9 is an exploded perspective view showing the procedure for attaching the lid 5 to the top cover 4.

  FIG. 10 is an E-E cross-sectional view showing the configuration in the vicinity of the rotary dampers 60 a and 60 b when the lid 5 is attached to the top cover 4. FIG. 10 (a) shows the state before attaching the lid, and FIG. 10 (b) shows the state after attaching.

  As shown in FIGS. 5 to 9, in the assembled state before the lid 5 is attached to the top cover 4, the handle portion 7 serving as the handle at the time of opening operation integrally with the lid lower surface cover 49 attached to the lid glass Provided along the side, the pair of support shafts 54a and 54b, the lid springs 55a and 55b, and the pair of rotation dampers 60a and 60b extend along the rear side of the lid 5 via the reinforcing metal fitting 52 or the boss 53. The cover support shaft 6 is attached to the cover lower surface cover 49, and becomes the cover support shaft 6 serving as a pivot for opening and closing via the hinge fittings 56a and 56b at the left and right ends and the support shafts 54a and 54b. The inner side of the left and right hinge fittings 56a and 56b is covered by a lid hinge cover 51. The central portion of the lid hinge cover 51 is cut away, and the damper shafts 62a and 62b of the rotary dampers 60a and 60b are exposed inward.

  The pair of hinge fittings 56a and 56b are rotatably supported on the left and right outside of the lid hinge cover 51 and around pivots 54a and 54b while receiving rotational torque generated by the lid springs 55a and 55b. . Since the cover 5 receives the rotational torque in the direction to open the cover 5 by the cover springs 55a and 55b around the support shafts 54a and 54b, as shown in FIGS. 5 to 9, the cover 5 has a top cover In the state before attaching to 4, the cover 5 is in the fully open position in contact with the stopper (not shown) with respect to the hinge fittings 56a and 56b.

  Therefore, as shown in FIG. 9 to FIG. 10A, when the lid 5 is in the fully open position, the positional relationship suitable for attaching the hinge fittings 56a and 56b to the top cover 4 is obtained. The top cover 4 is provided with recesses 57a, 57b for receiving the hinge fittings 56a, 56b, and the grooves 68a are provided with projections 64a, 64b at the front ends of the hinge fittings 56a, 56b at the front ends of the recesses 57a, 57b of the top cover 4. After being inserted into 68 b, the hinge fittings 56 a, 56 b are screwed to the bosses 65 provided on the lower surfaces of the concave portions 57 a, 57 b of the top cover 4.

  The surrounding area of the recesses 57a and 57b of the top cover 4 is surrounded by a standing wall connected to the upper surface of the top cover 4 and a downward wall forming the side wall of the laundry inlet 3, and therefore has a rigidity compared to a flat plate. Since the height is high, the top cover 4 does not need a reinforcing member formed of, for example, an iron plate, and the hinge fittings 56a and 56b may be simply fixed to the boss 65 forming a part of the top cover 4 with tapping screws. Sufficient strength is obtained.

  The details of the damper receiving portion 63 provided on the top cover 4 will be described. The upper surface of the damper receiving portion 63 is open so as to be fitted with the damper shafts 62a and 62b having the oval shape as described above. A substantially U-shaped groove was provided. If the damper shafts 62a and 62b of the rotary dampers 60a and 60b are lowered from directly above when the lid 5 is attached, the damper shafts 62a and 62b are inserted into the damper receiving portion 63 as shown in FIG. It is arranged in the fitting direction. Here, if the lid 5 opens and closes, the rotary damper main bodies 61a and 61b rotate with the lid 5, while the damper shafts 62a and 62b do not rotate, so that viscous resistance is applied to the lid 5 to open and close. It can be slow.

  After the hinge fittings 56a and 56b are attached and screwed to the recess of the top cover 4, hinge covers 70a and 70b, which are covers covering the recess of the top cover 4, are attached. The hinge covers 70a and 70b may be fixed by a so-called snap fit, which is a fixing claw that utilizes, for example, elastic deformation of a resin material. If the upper surface after attaching the hinge covers 70a and 70b is made flush with the upper surface of the top cover 4, there is no difference in level due to the absence of steps and detergent and water to the hinge fittings 56a and 56b It can prevent adhesion. Also, the screws 66 for attaching the hinge fittings 56a and 56b can be concealed.

  2, 8 and 10 (b) show a state in which the hinge covers 70a and 70b are attached after the hinge fittings 56a and 56b are attached and screwed to the recess of the top cover 4.

  As shown in FIG. 2, after attaching the lid 5 to the top cover 4, the interface between the fixed part and the rotating part related to the opening / closing operation of the lid 5 is the damper shaft 62 a of the rotary dampers 60 a, 60 b It is only between the central portion in which 62b is fitted to the damper receiving portion 63 and between the left and right outer side surfaces of the lid hinge cover 51 and the inner side surfaces of the hinge covers 70a and 70b. Since the number of sliding surfaces that form the boundary between the fixed part and the rotating part is small, it is easy to ensure the accuracy of the gap size and there is no friction load due to contact with each other. The opening and closing operation of 5 is smooth, detergent and water do not enter the lid 5 through the gap and do not adhere to the spindles 54a and 54b and the lid springs 55a and 55b, and the opening and closing operation of the lid 5 is stable Have the effect of

  Here, the width in the left-right direction of the lid 5 is made larger than the width in the left-right direction of the concave portions 57 a and 57 b provided in the top cover 4. Then, when the lid 5 is closed, the boundary between the hinge covers 70a and 70b covering the concave portions 57a and 57b and the top cover 4 is located inside the left and right side surfaces of the lid 5, so detergents etc. are hinged There is an effect that it is difficult to intrude from the boundary between 70 a and 70 b and the top cover 4.

  Here, since the second extension portions 59a and 59b are disposed on the inner peripheral side of the lid hinge cover 51 in the entire angular range of the opening / closing operation of the lid 5, the lid is rotated even if the lid 5 is rotated. The first extension portions 58a, 58b of the body springs 55a, 55b and the second extension portions 59a, 59b do not both protrude to the outer periphery of the lid hinge cover 51 or the hinge covers 70a, 70b. Therefore, since the lid 5 does not require a groove or the like for preventing interference with the end of the lid spring 55a, 55b, it is possible to prevent the entry of detergent or water from the groove and prevent rusting of the spring. effective.

  Next, the relationship between the weight of the lid 5 and the torsion torque of the lid springs 55a and 55b will be described with reference to FIG.

  FIG. 11 is a side view showing the relationship between the opening angle of the lid 5, the center of gravity of the lid 5, and the opening / closing force at the tip of the lid 5. As shown in FIG.

  In FIG. 11, a lid 5 having a mass m and a front and rear length L generates a force mg at the center of gravity G, assuming that the gravitational acceleration is g. When the lid 5 is closed, the angle of the lid 5 is θ1, and the front end is lower than horizontal, so θ1 becomes a negative value, for example, -10 °.

Here, the distance from the support shafts 54a and 54b, which are the rotation centers of opening and closing, to the center of gravity G is R1, the torque in the opening direction generated by the lid springs 55a and 55b is T1, and the force in the closing direction generated at the tip of the lid 5 is If it is F1, from balance of moment,
F1 × L = mg × R1-T1 (Equation 1)
That is, the tip force F1 required to open the lid 5 is
F1 = (mg × R1-T1) / L (Equation 2)
It becomes.

Alternatively, the torque T1 generated by the lid springs 55a and 55b at that time is
T1 = mg × R1−F1 × L (Equation 3)
It is expressed as

  Here, as an appropriate value of F1, a force of, for example, about 5 N to 7 N is required for the lid 5 to be stably placed on the top cover 4 even in the vibration of the dehydration step. . Depending on the mass and the position of the center of gravity of the lid 5, it is possible to obtain the torque T1 of the lid springs 55a and 55b such that F1 has a predetermined value when the opening angle of the lid 5 is θ1.

  When the angle of the lid 5 becomes θ2, for example, 60 °, it is assumed that the moment by its own weight (mg × R2) and the moment by a torsion spring (T2) are balanced. That is, when the opening angle of the lid 5 is smaller than θ2, the closing moment of the lid 5 due to its own weight overcomes the moment by the lid springs 55a and 55b, and the lid 5 is closed.

  On the other hand, when the opening angle of the lid 5 is larger than θ2, the moment by the lid springs 55a and 55b overcomes the closing moment of the lid 5 by its own weight, and the lid 5 opens.

That is,
T2 = mg × R2 (Equation 4)
The moment T2 due to the lid springs 55a and 55b when the opening angle of the lid 5 is θ2 may be set so that

    When the lid 5 is fully open and has an angle θ3, the lid 5 is tilted backward by, for example, about 10 ° behind the vertical. In this case, the center of gravity G is rearward of the support shafts 54a and 54b, and the lid 5 is maintained in the fully open state by the tip force F3 in the opening direction.

At this time, the moment by its own weight (mg × R3) and the moment by a torsion spring (T3) both occur in the opening direction,
F3 × L = mg × R3 + T3 (Equation 5)
It is represented as That is, F3 = (mg × R3 + T3) / L (equation 6)
It becomes.

  The moment (T3) is a moment generated by the lid springs 55a and 55b when the lid 5 is fully opened, that is, as shown in FIG. 9 to FIG. When attaching to the cover 4, it is nothing but the twisting torque generated by the lid springs 55a and 55b.

  Here, the spring constant is selected so that the weight of the lid 5 and the torque of the lid springs 55a and 55b are balanced when the opening angle of the lid 5 is θ2, but θ2 is, for example, about 60 °, When the lid 5 is opened more than that, it is desirable that the torque of the spring overcomes its own weight and automatically open. Such characteristics are obtained by making the spring constant relatively small, and as a result, even when the lid 5 is fully opened and the angle θ3 is reached, the torque T3 by the lid springs 55a and 55b is used to Work in the opening direction.

  If the spring constant is larger than the desired characteristics, for example, when the opening angle of the lid 5 is θ2, the weight of the lid 5 and the torque T2 by the lid springs 55a and 55b are balanced, and the angle θ3 is fully opened. If the torque by the lid springs 55a and 55b is set to 0 at this time, the torque by the lid springs 55a and 55b decreases sharply when the lid 5 is slightly opened from the opening angle θ2. It is impossible to overcome the moment of the lid 5 due to its own weight, and the lid 5 can not move in the opening direction by the spring force and returns to the angle θ2 again.

  That is, when the opening angle of the lid 5 is θ 1, the lid spring generates characteristics such that the torque T 1 is obtained by Equation 3 and when the opening angle of the lid 5 is θ 2, the torque T 2 is obtained by Equation 4 In the case of 55a and 55b, since the biasing force in the opening direction or closing direction can be switched at a predetermined angle θ2 during opening / closing rotation of the lid without using so-called toggle spring, the number of parts is small. There is an effect that a washing machine having a lid 5 whose structure is simple and easy to use can be obtained.

  FIG. 12 is a block diagram of the control device 80 of the washing and drying machine. A microcomputer 81 is connected to the operation button input circuit 82 connected to each switch (not shown), the water level sensor 27, and the temperature sensor 40, and receives various information signals in the button operation of the user, the washing process, and the drying process. The output from the microcomputer 81 is connected to the drive circuit 83, and is connected to the feed water solenoid valve 17, the drain valve 45, the drive motor 24, the blower fan 37, the heater 38, the electromagnetic control clutch 25, the lock means 9, etc. Control opening and closing, rotation and energization. Further, it is connected to a display 84 such as a 7-segment light emitting diode, a buzzer 85 and a light emitting diode 87 for notifying the user of the operating condition of the washing machine. The microcomputer 81 is activated when the power switch 86 is pressed and the power is turned on, and executes a basic control processing program of washing and drying as shown in FIG.

  Step S101 The state check and initial setting of the electric washing machine are performed.

  Step S102 The display 84 of the operation panel 20 is turned on, and the washing / drying course is set in accordance with the instruction input from the operation button switch (not shown). In the absence of an instruction input, the standard wash / dry course or the previous wash / dry course is automatically set. For example, when the operation button switch is instructed and input, a high finish course of drying is set.

  Step S103 A command is monitored from a start switch (not shown) of the operation panel 20 to branch the process.

  Step S104 Detect the amount of detergent. Before supplying the washing water, the electromagnetic control clutch 25 and the drive motor 24 are controlled to rotate only the rotary wing 22 in one direction with the water tank 18 stopped, and based on the rotational load amount generated on the rotary wing 22 Detect the amount of clothes. Determine the required amount of detergent based on the detected amount of cloth.

  Step S105 The calculated amount of detergent is displayed on the display 84 of the operation panel 20.

  Step S106 After the user has put the necessary amount of detergent into the detergent case 13, the detergent water supply solenoid valve 17 is opened to supply water to the detergent input chamber of the detergent case 13. The powdered detergent introduced into the detergent feeding chamber drops from the detergent / softener inlet 14 to the bottom of the outer tank 15 together with the water of the detergent water supply.

  Step S107 Once the detergent dissolution water level has been supplied, the detergent water supply is stopped. The amount of water supplied at this time is, for example, about 10 liters.

  Step S108 By integrally rotating the water tank 18 and the rotary wings 22 in one direction at a low speed, the detergent and detergent dissolving water introduced to the bottom of the outer tank 15 are agitated at the bottom of the water tank 18 to achieve high concentration. Dissolve detergent to produce wash water.

  Step S109 A prewash is performed. In this pre-washing, while the water tank 18 is stopped, agitation for rotating the rotary wings 22 forward and reverse is intermittently performed, and the circulating pump 42 is operated during that time to flush the bottom of the outer tank 15 from the nozzle 47. Scatter on the laundry. While the rotor 22 and circulation pump 42 are stopped, the detergent water supply solenoid valve 17 and the laundry water supply solenoid valve 17 are opened with reference to the detection signal of the water level sensor 27 so that the water level does not exceed the set water level. Do. This operation is repeated a plurality of times so that the laundry is washed with water and dispersed on the rotors 22.

  Step S110: A main wash is performed. In this main wash, while the water tank 18 is stopped, the circulation pump 42 is operated while rotating the rotary wings 22 forward and reverse to wash the wash water accumulated on the bottom of the outer tank 15 from the nozzle 47 onto the laundry. Stirring to carry out water circulation and cloth loosening stirring to rotate the rotor 22 forward and reverse with the circulation pump 42 stopped and the circulation of washing water stopped are repeated. The forward and reverse rotation of the rotors 22 causes the laundry to be switched circumferentially and radially in the water tank and to be cleaned evenly.

  Thereafter, in a state where the circulation pump 42 is stopped to stop the circulation of the flush water, the forward and reverse rotations of the rotary vanes 22 are continued to perform uniform stirring.

  Step S111 A first reservoir rinse is performed. In this reservoir rinse, the drainage valve 45 is first opened, and the washing water accumulated at the bottom of the outer tank 15 is integrally contained in the laundry by rotating the water tank 18 and the rotary wings 22 integrally in one direction to the ground under drainage. Centrifugal dewatering. After that, while closing the drainage valve 45 and rotating the water tank 18 and the rotary wing 22 integrally in one direction at a low speed, the washing water supply solenoid valve is opened to sprinkle tap water from the nozzle 47 onto the laundry on the rotary wing Supply water.

  Next, in a state where the rotation of the water tank 18 and the rotary wings 22 is stopped, rinse water is supplied so that the water level at the bottom of the outer tank 15 does not exceed the set water level.

  Next, similarly to the main washing, while rotating the rotary wings 22 in a forward and reverse direction with the water tank 18 stopped, the circulation pump 42 is operated to rinse water accumulated on the bottom of the outer tank 15 from the nozzles 47 through the rotary wings 22. Perform a rinse water rinse, circulating to sprinkle over the upper laundry.

  Next, in a state where the operation of the rotary wings 22 and the circulation pump 42 is stopped, water is replenished so that the water level does not exceed the set water level while detecting the water level of the rinse water accumulated in the bottom of the outer tank 15.

  Next, with the water tank stopped, the circulation pump 42 is operated while rotating the rotary wings 22 forward and reverse, and the rinse water collected at the bottom of the outer tank 15 is transferred from the nozzles 47 to the laundry on the rotary wings 22. Circulate as you sprinkle. As in the case of washing, the laundry in the water tank 18 is replaced circumferentially and radially, so that the rinse water is evenly applied to the laundry and the detergent is diluted.

  After that, with the circulation pump 42 stopped and the circulation of rinse water stopped, the forward and reverse rotation of the rotary vanes 22 is continued to carry out uniform homogenization.

  Step S112 A second reservoir rinse is performed. This second reservoir rinse is performed by adding the control for introducing the softener to the bottom of the outer tank 15 by opening the softener water supply solenoid valve 17 and supplying the softener charging chamber in the detergent case 13 with water. The operation is similar to the first sump rinse.

  Step S113 A final dehydration process is performed. In the final dewatering, the water tank 18 and the rotor 22 are integrally rotated in one direction at a high speed while the drainage valve 45 is kept open, and the laundry in the water tank 18 is centrifugally dewatered.

  Step S114 The process branches following confirming whether the washing and drying course is selected.

  Step S115 If the washing and drying course is selected, the drying step is carried out. In the drying step, with the drainage valve 45 open, the blower fan 37 is operated while rotating the rotary wings 22 in a state in which the water tank 18 is stopped in the same manner as in the washing step. Wet air is sucked from the water vent 35 into the drying duct 36, and when passing through the drying duct 36, it is dehumidified by the cooling water flowing from the water dehumidifying mechanism 19 installed in the drying duct 36. Thereafter, the lint is removed through the lint filter 39 and then heated by the heater 38 and blown into the water tank 18 from the hot air outlet 32.

  Drying is performed while monitoring the temperature of the warm air by the temperature sensor 40, and is ended when the rate of temperature change reaches a predetermined value.

  In this embodiment, although it demonstrated as a washing-drying machine provided with the drying function, it may be an electric washing machine which does not have the drying function.

  According to the present embodiment, the biasing force in the opening direction or closing direction can be switched at a predetermined angle during the opening / closing rotation operation of the lid without using the toggle spring, so the number of parts is small, and the structure There is an effect that a washing machine provided with a lid 5 that is simple and easy to use can be obtained.

  Further, according to the present embodiment, even if the lid 5 is turned, the first extending portions 58a, 58b of the lid springs 55a, 55b and the second extending portions 59a, 59b both have the lid hinge cover 51 or the hinge Since the cover 5 does not protrude to the outer periphery of the covers 70a and 70b, the cover 5 does not need a groove or the like for preventing interference with the cover springs 55a and 55b, and detergent and water enter the groove and the spring Has the effect of never rusting.

  Further, according to the present embodiment, the second extension portions 59a, 59b of the lid springs 55a, 55b extend in the axial direction of the lid springs 55a, 55b, and the inner side surfaces and the outer sides of the hinge fittings 56a, 56b. Since the configuration is supported at two points through both side surfaces with the side surface, the second extension parts 59a and 59b are stably supported at two points even when a torsion torque is applied to the lid springs 55a and 55b. . Therefore, the spring constant of the lid springs 55a, 55b is stabilized regardless of the load, and the effect of preventing the generation of excessive stress in the second extension portions 59a, 59b of the lid springs 55a, 55b is obtained.

  Further, according to the present embodiment, since the lid 5 can be supported at three places of the hinge fittings 56a and 56b at the left and right ends and the damper receiving portion 63 at the central portion, the accuracy of the rotation axis of the lid 5 In addition, since the cover 5 is hardly bent or deformed, the opening / closing operation of the cover 5 is stabilized.

  According to the present embodiment, since the recesses 57a and 57b provided on the left and right sides of the top cover 4 are not flat but have high rigidity, the top cover 4 does not need a reinforcing member formed of, for example, an iron plate. There is an effect that sufficient strength can be obtained with a simple configuration.

  Further, according to the present embodiment, one of the pair of rotary dampers 60 a and 60 b is configured to apply the viscous resistance torque when the lid 5 is opened, and the other is viscous when the lid 5 is closed. By adopting a configuration in which the resisting torque acts, the opening / closing operation of the lid 5 can be slowed down, and the lid 5 does not close rapidly or does not rapidly open in the vicinity of full opening, and is stable There is an effect that the lid 5 can be opened and closed.

  Further, according to the present embodiment, the hinge fittings 56a and 56b serving as the rotation supporting point of the lid 5 are accommodated in the recesses 57a and 57b provided on the left and right side surfaces of the top cover 4, and the upper surfaces are covered with the hinge covers 70a and 70b. Since the hinge fittings 56a and 56b are not subjected to detergent or water, and the hinge fittings 56a and 56b are not rusted, the present invention has the effect of providing a highly reliable washing machine.

DESCRIPTION OF THE REFERENCE NUMERALS 1 washing machine body 2 housing 3 laundry inlet 4 top cover 4 a back cover 5 lid 6 lid support shaft 7 handle 8 lock receiving recess 9 locking means 9 a rod 10 lock receiving hole 11 lock receiving protrusion 12 detergent case cover 13 Detergent case 14 Detergent / softener input port 15 Outer tank 16 Water supply port 17 Water supply solenoid valve 18 Water tank 18a Through hole 18b Through hole 19 Dehumidifying mechanism 20 Operation panel 21 Hanging rod 22 Rotor blade 23 Fluid balancer 24 Drive motor 25 Electromagnetic operation clutch 26 Air trap 27 Water level sensor 28 Vibration sensor 29 Tank cover 30 Inner lid 31 Hinge air outlet 33 Water supply inlet 34 Circulating water inlet 35 Water flow vent 36 Drying duct 37 Air blower fan 38 Heater 39 Filth filter 40 Temperature sensor 41 Bellows Pipe 42 Circulation pump 43 Circulation pipe 44 Foreign matter trap 45 Exhaust Water valve 46 drainage hose 47 nozzle 48 lid glass 49 lid lower surface cover 50 lid back surface cover 51 lid hinge cover 52 reinforcement bracket 53 boss 54a, 54b spindle 55a, 55b lid spring 56a, 56b hinge bracket 57a, 57b recess 58a, 58b First Stretched Portion 59a, 59b Second Stretched Portion 60a, 60b Rotation Damper
61a, 61b Damper body 62a, 62b Damper shaft 63 Damper receiving part 64a, 64b Convex part 65 Boss 66 Screw 67a, 67b Spring receiving hole 68a, 68b Groove 69a, 69b Damper stopper part 70a, 70b Hinge cover 80 Control device 81 microcomputer 82 operation button input circuit 83 drive circuit 84 indicator 85 buzzer 86 power switch

Claims (3)

A top cover placed on the upper portion of the washing machine main body, and a single-plate lid pivotally supported on a top surface of the top cover around a lid support shaft between a fully open position and a fully closed position. A body and a lid spring biasing the lid in the opening direction;
At a predetermined angle during the opening and closing operation of the lid, the force in the opening direction generated from the lid spring and the force in the closing direction generated by the weight of the lid are balanced,
When the opening angle of the lid is 0 ° when the lid is horizontal and the opening angle of the lid is 90 ° when the lid is vertical,
When the opening angle of the lid becomes smaller than the predetermined angle, the lid pivots in the closing direction and pivots to the fully closed position,
When the opening angle of the lid becomes larger than the predetermined angle, the lid pivots in the opening direction and pivots to the fully open position,
When the lid is fully closed, the opening angle of the lid is a negative angle, and the force in the closing direction generated by the weight of the lid is larger than the force in the opening direction generated from the lid spring. To make an electric washing machine. A top cover placed on the upper portion of the washing machine main body, and a single-plate lid pivotally supported on a top surface of the top cover around a lid support shaft between a fully open position and a fully closed position. A body and a lid spring biasing the lid in the opening direction;
At a predetermined angle during the opening and closing operation of the lid, the force in the opening direction generated from the lid spring and the force in the closing direction generated by the weight of the lid are balanced,
When the opening angle of the lid becomes smaller than the predetermined angle, the lid pivots in the closing direction and pivots to the fully closed position,
When the opening angle of the lid becomes larger than the predetermined angle, the lid pivots in the opening direction and pivots to the fully open position,
When the lid is fully closed, the front end of the lid is lower than horizontal, and the force in the closing direction generated at the tip of the lid is a positive value. And
A lid provided on the housing and comprising glass;
A lid spring provided between the housing and the lid for biasing the lid in the opening direction;
The lid spring is
At a predetermined angle between the fully open state and the fully closed state of the lid, the moment in the opening direction by the lid spring is balanced with the moment in the closing direction by the weight of the lid,
When the opening angle of the lid is smaller than the state in which the moments are balanced, the lid is pivoted in the closing direction,
When the opening angle of the lid is larger than the state in which the lid is in balance, a spring force is set to turn the lid in the opening direction,
The electric washing machine according to claim 1, wherein the lid is configured such that the front end is lower than horizontal when the lid is fully closed.

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