JPS6025986B2 - Washing machine stirring blade rotation angle switching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a quasi-Western-style washing machine in which a hawk wing that washes laundry by crossing the ocean and a rotor of a motor that rotates the hawk wing are directly connected. The purpose of this is to control the rotation angle in multiple stages.

Conventionally, the method of switching the strength of the water flow in this type of washing machine was to use a motor to reduce gear speed and use a crank mechanism to rotate and reciprocate the rotary blade, but some methods also mechanically change the rotation angle. However, since the mechanism is complicated, most of them control the strength of the water flow by changing the number of strokes by switching the number of poles of the motor, or by replacing the rope blades. The present invention is intended to provide a simple and highly reliable rope azusa blade rotation angle switching device,
One embodiment will be described in detail below.

FIG. 1 shows a cutaway cross-sectional view of the washing machine, in which numeral 1 is an outer frame, 2 is an outer slag, and 3 is a washing tub and dewatering tub.

Reference numeral 4 denotes a rotary blade that feeds the laundry in the washing tub, and 5 is a clutch mechanism that switches the rotary shafts of the rotary rotor 4 and the washing tub 3 between fixed and rotatable, and is connected to the rotary shaft of the linear motor 6. are doing.

The linear motor 6 is a flat motor having at least one stator 6' and at least six rotors 6'. 7
is a magnet, 8 is a self-holding type ride switch, and both are:
They face each other with a certain gap, and in this state the contacts of the reed switch are closed.

The magnet 7 is fixed to the rotor rotation key and performs a rotational circular motion around the fixed point. 9 is an AC magnet that controls the clutch mechanism and the drain valve.

1. The vibration isolation mechanism suspended from the outer frame 1 allows the outer tank 2 to
are connected.

FIG. 2 is a cross-sectional view of the switching section for controlling the rotation angle. The magnet 7 consists of 7a, 7b, 7a' and 7b'.
' are set at a certain angle and face the reed switch 8 with different polarities. FIGS. 3 and 4 show the circuit configuration, and FIG. 3 is a specific example in which a self-holding reed switch with single-pole dual-type contacts is used as the reed switch 8, and FIG. 4 shows the following: This is a specific example of using a self-holding reed switch with a single-pole single-immersion type contact.

11 is an AC power supply, 12 is a water supply valve, 13 is a timer motor, 14 is a water level switch, 15a and 15b are gate-controlled semiconductor switching elements for controlling the rotational direction of the motor 6, and 16 is for starting and operating the motor 6. A capacitor 17 represents a current limiting resistor for controlling the gates of the elements 15a and 15b.

18 determines which gate of the gate-controlled semiconductor switching element that determines the rotational direction of the motor is fired.
This switch is used to set the rotation direction of the motor in the opposite direction.This switch is used to set the rotation angle of the motor.

19 is a relay used only when the single-pole, single-throw type read switch 8 is used.

Contacts T and T5 are cam contacts whose opening and closing are controlled by the timer motor 3, and a program chart showing the opening and closing states thereof is shown in FIG.

Next, to explain the specific operation, when the timer is set and the cam contact is closed, the timer motor 3 is activated.
The contacts of the water level switch 14 are closed to the NC side.

Next, the cam contact T3 closes and the water supply valve 12 operates to start supplying water, and when the water reaches a certain level, the contact of the water level switch 14 is switched and the NO side is closed. At this time, the water supply is stopped, and then the cam contact T5 closes to start washing. Here, assuming that the grain counterfeit shown in FIG. 2 has magnets 7a and 7b, in the circuit diagram of FIG. There is. Therefore, the gate-controlled semiconductor switching element 15a becomes conductive, and the motor 6, which has air gaps in all directions of its axis, rotates clockwise, and at the same time, the cylindrical blade rotates. Now, if we consider the case where the reed switch 8 is installed in a position facing the magnets 7a and 7b, the rotation of the motor 6 rotates the magnets 7a and 7b, and the magnet 7b (for example, S pole) rotates.
However, since the contact of the reed switch 8 is closed to the b side and maintains that state, the gate-controlled semiconductor switching element 1
5b becomes conductive, and the motor 6 reverses. At this time, even if the motor shaft rotates a little too much due to inertia, the contacts of the reed switch 8 are reliably switched and the motor 6 rotates in the opposite direction, thereby applying rotational braking, so that the rotation is quickly reversed.

When the motor 6 is reversed, rotates in the direction of the rebound indicator, rotates by an angle B degrees, and the magnet 7a (for example, N pole) passes near the reed switch 8, the contact of the reed switch 8 is closed again to the a side and its In order to maintain the state, the gate-controlled semiconductor switching element 15a is turned on and rotates clockwise again from the outside of the motor, performing forward and reverse rotation at an angle of B degrees.

When the washing process is completed by repeating the above operations, cam contacts T3 and T5 are opened, and when cam contact T2 is closed, the drain valve operates and the water in the pot is drained.When the drain is finished, the water level switch is turned on. 4, the contact is switched to the NC side, and when the drainage process is completed, the cam contact T2 is opened.

Next, operations similar to those in the washing process are performed in the rinsing process, and water supply, rinsing, and drainage processes are performed. During the dewatering process, the water level switch 14 has a contact on the NC side, cam contacts T2 and T4 close, and the motor 6 rotates in only one direction, regardless of the gate-controlled semiconductor switching element.
By the operation of the clutch mechanism 5, the dehydration tank becomes rotatable and dehydration is started.

When the dewatering process is completed, the cam contact T is opened and the washing process is completed.

As described above, washing is carried out, but if the water flow is made weaker (the rotation angle of the trailing blade is made smaller), and if the setting switch 18 is set to the broken line diagram in the circuit diagram of Fig. 3, The rotation angle becomes A degree by the following operation.

That is, assuming that the magnets 7a, 7b and the reed switch 8 are in the positional relationship shown in FIG. 2, and the contacts of the reed switch 8 are closed on the a side in the circuit diagram of FIG. 3, the gate-controlled semiconductor switching element 15b is in the operating state, the motor 6 rotates counterclockwise, and at the same time, the Azusa blade rotates.

Magnets 7a and 7b rotate due to the rotation of the motor, and magnet 7a
(for example, the N pole) passes through the reed switch 8 first, but the contact of the reed switch 8 remains closed to the a side and continues to rotate counterclockwise outside the motor.
Next, when the magnet 7b (for example, S pole) passes near the reed switch 8, the contact of the reed switch 8 is switched to the b side, and in order to maintain this state, the gate-controlled semiconductor switching element 15a is in the conductive state. Instead, the motor reverses and rotates clockwise, rotating through an angle of A degree to rotate the magnet 7a.
passes near the reed switch 8, the contacts of the reed switch 8 are closed again to the side a, and in order to maintain this state, the gate-controlled semiconductor switching element 15b is fired, and the motor is rotated counterclockwise again. Rotate and perform forward and reverse rotation at an angle of A degree. In the above explanation, the reed switch 8 is a self-holding reed switch with a single-pole double sinking contact, but even in the case of a self-holding reed switch with a single-pole, single-throw contact, Relay 1 with dual-purpose contacts
If you use 9 together, your purpose will be fulfilled. The circuit configuration in this case is shown in FIG. In addition, instead of just one pair of magnets, two or more pairs are installed on different circles of the same D (in Fig. 2, the same D circles are different in the horizontal direction, but even if they are on the same circle, they are placed on different circles of the same D). You may shift the position.

), by setting the magnets 7a' and 7b' at different angles and moving the position of the opposing lead switch 8, switching between C degrees and D degrees can be performed, for example. If a plurality of pairs of switching mechanisms are provided with one changeover switch, multi-stage angle changeover control is possible. The present invention described above has the following excellent effects.

1. By providing one reed switch with a self-holding function, an opening/closing mechanism that opens and closes it, a switching element that controls the rotation direction of the motor, and a switch mechanism that switches the rotation direction of the motor between forward and reverse, The mechanism is simple,
It is inexpensive, highly reliable, and can control the rotation angle of the rope azusa blade with high repeatability (angle that divides 360 degrees into two).

2. By providing multiple sets of reed switch opening/closing mechanisms and a mechanism for moving the reed switch to the opposite position, multi-stage angle switching can be achieved without changing the circuit configuration, and the mechanism is simple and inexpensive control can be realized. .

[Brief explanation of the drawing]

FIG. 1 is a broken cross-sectional view of a washing machine showing an embodiment of the present invention, FIG. 2 is a detailed plan view of the angle switching section, FIGS. 3 and 4 are circuit configuration diagrams showing the embodiment, and FIG. The figure is a program chart diagram of the cam contact of the circuit configuration. 6... Linear motor, 7... Magnet, 8
...Reed switch, 9...Clutch mechanism, 18...Motor rotation direction setting switch. Figure 1 Figure 2 Figure 〇 Hinamatsu scale scale diagram Yamasato

Claims (1)

[Scope of Claims] 1. The washing tub and the stirring blade are coaxially provided with rotating shafts, and at least one stator and at least one rotor are connected to the rotating shaft via a clutch mechanism. A switching element is provided with a motor having a rotor, and a switching element having a self-holding function that is opened and closed by the opening and closing means, in which opening and closing means that are paired on a concentric circle of the rotating shaft are connected to the rotor shaft of the motor. A stirring blade rotation angle switching device for a washing tub, which is arranged to face each other and is configured to switch the rotation angle within one rotation of the motor into multiple steps by a switch mechanism that switches the rotation direction of the switching element and the motor between forward and reverse directions. Device. 2. At least two or more pairs of opening/closing means are provided on concentric circles with different rotation radii connected to the rotor shaft of the motor, and the switching element is movable to a position facing the opening/closing means. The stirring blade rotation angle switching device of the washing machine described above.