JPS5931192Y2 - automatic washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic washing machine capable of executing any one of a plurality of washing courses.

Conventionally, a program selection circuit including a selection switch for selecting any one of a plurality of programs for executing a washing course, and a control device for executing a washing course corresponding to the selected program based on the selected program have been conventionally provided. An equipped automatic washing machine is provided.

However, in such an automatic washing machine, once a program for executing an arbitrary washing course is selected, if a finger or the like accidentally touches the operation key of the selection switch, or if a child tampers with the operation key, There is a problem that a program for executing another washing course may be selected inadvertently.

The present invention was developed in response to the above problems, and its purpose is to prevent the selected washing course execution program from being mistakenly replaced with another washing course execution program. Moreover, an automatic washing machine that has the effect that a reselection period of a predetermined time always exists after the selection operation of the program for executing the washing course, and even if a mistake is made in selecting the program for executing the washing course, it can be easily corrected. We are here to provide you with a machine.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, which shows the schematic structure of a washing machine with a dewatering function as a single-action washing machine, 1 is an outer box, inside which a water receiving tank 2 is supported by an elastic support mechanism 3; A rotating tank 4 is rotatably arranged.

Reference numeral 5 denotes a power transmission mechanism, which is configured to selectively transmit the rotational force of the motor 6 to the rotating tank 4 and the pulsator 7 therein.

Reference numeral 8 denotes an operation box erected on the upper part of the outer box 1, and a plurality of selection switches described later are arranged on the front panel 8a of this operation box.

Further, 9 is a lid for opening and closing the top opening of the outer box 1.

On the other hand, in the block diagram shown in FIG. 2, numeral 10 denotes a control device including a microprocessor and a memory circuit, and the memory circuit stores a plurality of, for example, seven types of washing course execution programs.

Reference numeral 11 denotes a state detection unit, which includes a lid switch that detects the open/closed state of the lid 9, an abnormal vibration detection switch that detects when the water receiving tank 2 is in an unbalanced vibration state, and a water level inside the water receiving tank 2. It has a water level switch and the like (none of which are shown) for detecting changing states, and is configured to provide signals corresponding to the above-mentioned states detected by each switch to the control device 10 as information input.

Reference numeral 12 denotes an operation unit, which is a power off switch 13 for cutting off the power to the control device 10. 7 for selecting any one of the seven types of washing course execution programs.
A program selection circuit 21. includes selection switches 14 to 20. It has a timer 22 and a return circuit 23 (see FIG. 3 for both), which will be described later, and each selection switch 13 to 20.
The configuration is such that a voltage signal is given to the control device 10 in response to the closing of the switch.

Note that each of the selection switches 14 to 20 is operated by detecting the contact of a finger to the operation key thereof, and is configured as a so-called soft touch switch.

Reference numeral 24 denotes a driving load section, which includes a water supply valve for supplying water into the water receiving tank 2, a drain valve for discharging water from the water receiving tank 2 (none of which are shown), and a drive load section that is connected to the motor 6 and other loads. Each load is configured to be driven via the amplification circuit section 25.

Here, when one of the selection switches 14 to 20 is closed while the control device 10 is powered on,
A washing course execution program corresponding to this is read out from the storage circuit, and the width increasing circuit section 25 is controlled based on the washing course execution program thus read out and the information input from the state detection section 11. Drive load section 2
This is a configuration in which each load such as the motor 6 in the washing machine 4 is operated in a predetermined manner to execute the above washing course.

Incidentally, 26 is a process display section, which is controlled by the control device 10 to sequentially display each step such as water supply, washing, etc. in the washing course in the process of executing the washing course selected as described above. It is a controlled configuration.

The specific circuit configuration of the operating section 12 will now be described with reference to FIG.

That is, 27 is a bus connected to the output terminal (10) of the control power supply via a power-on switch 28, and 29 is an auxiliary bus connected to this bus 27 through the collector-emitter of the transistor 30. The power off switch 13 has one end connected to the bus bar 27 and the other end connected to the input terminal P1 of the control device 10.

Each of the selection switches 14 to 20 has one end connected to the auxiliary bus 29 and the other end connected to the input terminals P2 to P8 of the control device 10, respectively, thereby forming the program selection circuit 21.

Although the power supply switch 28 actually has complicated conditions, in this embodiment, when it is closed, power is supplied to the control device 10, and when the power supply switch 13 is closed, the control device 10 is turned on. It may be understood that the configuration is such that the control device 10 opens the switch when a signal is input to the switch.

Further, the transistor 30 constitutes a switching element of the timer 22, and a bias resistor 31 is connected between its collector and base.

In the timer 22, a series circuit of a resistor 32 and a capacitor 33 as a timer is connected between the bus bar 27 and the ground terminal, and a diode 34 of the polarity shown is connected in parallel with the resistor 32.

Further, the collector-emitter of another transistor 35 is interposed between the base of the transistor 30 and the ground terminal, and the base of the transistor 35 is connected to the resistor 32 and the capacitor 33 via a Zener diode 36 having the illustrated polarity. Connected to a common connection point.

The timer 22 starts charging the capacitor 33, which is a timer, in response to voltage application to the bus bar 27, and at the same time turns on the transistor 30, which is a switching element.
Then, when the voltage between the terminals of the capacitor 33 reaches a predetermined value and the other transistors 35 are turned on, the transistor 30 is turned on.
This is a well-known configuration in which the timer operation is ended by turning off the controller.

The timed operation period of the timer 22 determined by the time constants of the resistor 32 and the capacitor 33 is set to, for example, about 10 seconds.

On the other hand, 37 is the restoration circuit 23 together with the transistor 38.
, each input terminal is connected to the other end side of each of the selection switches 14 to 20, and
An output terminal is connected to the base of the transistor 38 via a resistor 39.

The collector and emitter of the transistor 38 are connected in parallel with the capacitor 33.

Next, to explain the operation of the above configuration, only the operation of the operating section 12 related to the gist of the present invention will be described here.

Now, when the power on switch 28 is closed, the control device 10
When the power is turned on, a voltage is applied to the bus bar 27, and the timer 22 starts a timer operation.

During this timed operation period, that is, 10 minutes after the control device 10 is powered on.
During the second period, the transistor 30 is turned on and a voltage is applied to the auxiliary bus 29, so that a voltage signal can be given to the control device 10 by closing each of the selection switches 14 to 20, and the program selection circuit 21 is activated. If any one of the selection switches 14 to 20 is closed during this period, the washing course execution program corresponding to that switch can be selected.

When one of the selection switches 14 to 20 is closed during the selection operation of the program for executing the washing course as described above, the OR circuit 37 and the resistor 39 in the recovery circuit 23 are closed.
A voltage is applied to the base of the transistor 38 through the transistor 38 to turn it on.

Therefore, the charge in the capacitor 33 is discharged through the transistor 38, and the timer operation of the timer 22 is returned to its initial state.

Therefore, it is possible to reselect another program for about 10 seconds after selecting the program for executing the washing course.

Thereafter, after the selectable period of the program for executing the washing course as described above, that is, the timed operation period of the timer 22 has elapsed, the transistor 30 is turned off and the auxiliary bus 29 is turned off.
Since voltage is no longer applied to the selection switches 14 to 20, even if the selection switches 14 to 20 are closed, no voltage signal is applied to the control device 10, and the program selection circuit 21 is disabled, so that the program selection circuit 21 is disabled. Choice becomes impossible.

According to the present embodiment described above, the timer 22 consisting of the transistor 30, the capacitor 33, etc. is provided, and the program selection circuit 21 is enabled for a predetermined period (about 10 seconds) after the power is turned on to the control device 10 to perform arbitrary washing. The program for executing a washing course can be selected, and after the above-mentioned period has elapsed, the program selection circuit 21 is disabled to make it impossible to select a program for executing a washing course. After selecting,
Even if a finger or the like accidentally touches the operation keys of the selection switches 14 to 20, or a child tampers with the operation keys, if this occurs after the selectable period of the program for executing the washing course has elapsed, another washing program will be executed. This prevents the course execution program from being selected carelessly.

In addition, during the program selectable period, that is, the timer 2
2, when any one of the selection switches 14 to 20 is closed during the timed operation, a return circuit 23 is provided that returns the timed operation to the initial state, so that the selection operation of the program for executing the washing course is always after a predetermined time (
There is a program reselection period of 10 seconds), which is convenient in practice because even if a mistake is made in selecting a program, it can be easily corrected.

Incidentally, the timer 22 in the above embodiment. Return circuit 23
etc., the functions may be performed by a microcomputer.

According to the present invention, as explained above, it is possible to prevent a program for executing a washing course once selected from being mistakenly replaced with another program for executing a washing course, and to select a program for executing a washing course. To provide an automatic washing machine which can always provide a reselectable period of a predetermined time after an operation, and can easily correct even if a program for executing a washing course is selected incorrectly.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a schematic vertical sectional view of the entire device, FIG. 2 is a block diagram, and FIG. 3 is an electrical configuration diagram. In the figure, 10 is a control device, 14 to 20 are selection switches,
21 is a program selection circuit, 22 is a timer, and 23 is a return circuit.

Claims (1)

[Scope of utility model registration request] A program selection circuit including a selection switch for selecting an arbitrary one from among a plurality of programs for executing a washing course, and a control device for executing a washing course corresponding to the selected program based on the selected program. a timer that starts a timed operation for a predetermined time in response to power-on of the control device, enables the program selection circuit only during the timed operation period, and disables the program selection circuit during other periods; An automatic washing machine characterized by being provided with a return circuit for returning the timed operation to an initial state when the selection switch is operated during the timed operation of the timer.