JPS6055156B2 - time switch for washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a time switch for a washing machine that is used to obtain reverse water flow of various strengths in the washing machine.

Conventional time switches for washing machines include a circuit that energizes the washing motor only through a reversing switch, and an intermittent switch that operates on and off for short periods during the reversing time of the reversing switch, in addition to the reversing switch mentioned above. By selecting the circuit that energizes the washing motor through the washing motor, a medium water flow and a weak water flow are respectively obtained (for example, Japanese Patent Application Laid-Open No.
For example, when trying to wash laundry made of thin and easily damaged fabric using gentle water flow, the washing motor is operated intermittently many times, for example, for the first and second times. The washing motor rotates clockwise the third time, then counterclockwise the fourth, fifth, and sixth time, and so on, so the washing motor continues to rotate in the same direction many times, no matter how weak the water flow is. However, the above-mentioned laundry had the disadvantage that it became entangled, causing tears and fraying.

Therefore, the present invention is designed to eliminate the above-mentioned drawbacks.
Not only is it possible to select the type of water flow, but even when washing with a weak water flow, the direction of rotation can be reversed each time the washing motor starts and stops, allowing the washing machine to It is an object of the present invention to provide a time switch for a washing machine that can prevent damage caused by entanglement.

The drawings showing the embodiments of the present application will be described below.

In the reversing switch mechanism A, reference numeral 1 denotes a camshaft, which is rotated in the direction of the arrow by a well-known clock mechanism. 2 is a first reversing cam fixed to the camshaft 1, and the cam element 3
, 4, and 5.

The cam element 4 is constructed so that the cam elements 3 and 5 share a part. Reference numeral 6 denotes a second reversing cam, which is constructed similarly to the first reversing cam 2 by cam elements 7, 8, and 9.

Reference numeral 10 denotes a boss portion, which is provided in a well-known manner to fix the second reversing cam 6 to the camshaft 1. 11 indicates an intermittent cam.

Note that these first reversing cam 2, second reversing cam 6, and intermittent cam 1
1 is formed using an insulating material such as a synthetic resin material, as is well known. Next, 12 and 13 are positioning holes formed in the first reversing cam 2 and the intermittent cam 11, respectively, and 14 is a positioning pin protruding from the second reversing cam 6. By inserting the first reversing cam 2,
The mutual positional relationship (positional relationship in the rotational direction) of the unevenness of the second reversing cam 6 and the intermittent cam 11 is maintained appropriately. Next, reference numeral 15 denotes a first reversing switch, which, as is well known, is composed of a first contact plate 16, a second contact plate 17, and a switching contact plate 18, and each contact plate 16,
17, 18 are driven pieces 16a, 17a, 18. The cam elements 4, 3, 5 of the first reversing cam 2 are driven with a. Note that 16b, 17b, and 18b are contact members (generally called silver balls) attached to the respective contact plates, and the first
This constitutes a contact, a second contact, and a switching contact. 20
is a spacer fixed to the second contact plate 17, with its tip facing the first contact plate 16 and connected to the first and second contact plates 16,
17 and switching contact plate 18, or to prevent them from coming into contact with each other at the same time.

21 indicates a second reversing switch, and the first reversing switch 15
Similarly, it is composed of a first contact plate 22, a second contact plate 23, and a switching contact plate 24, and has driven pieces 22a, 23a, 24, respectively.
cam elements 8, 7, and 9 of the second reversing cam 6, respectively.

Reference numerals 22b, 23b, and 24b indicate contact members fixed to the respective contact plates, and constitute a first contact, a second contact, and a switching contact, respectively.

Further, 25 indicates a spacer fixed to the second contact plate 23,
It is provided for the same purpose as the first reversing switch 15. 26 indicates an intermittent switch, and the contact plate 27
, 28, and each contact plate is driven by the intermittent cam 11 with driven pieces 27a, 28a.

27b and 28b indicate contact members fixed to the respective contact plates.

In the case of the above configuration, when the camshaft 1 rotates in the direction of the arrow, the first reversing cam 2, the second reversing cam 6, and the intermittent cam 11
also rotates in the same direction.

The first reversing switch 15, which is driven by the rotation of the first reversing cam 2, has contact plates 16 and 17, respectively, as is well known.
, 18 are actuated by the contact elements to alternately bring the contact members 16b and 18b into contact and the connecting members 17b and 18b into contact. Also, this kind of operation is performed by the second reversing switch 21.
The same thing is done in . Furthermore, the second reversing switch 21
As is clear from the figure, the first reversing switch 15
Reversing operation occurs at a shorter period than . Next, FIG. 3 showing a circuit diagram of a washing machine using such a reversing switch mechanism A will be explained.

30 indicates a power source, which is generally a 100V commercial power source.

Reference numeral 31 denotes a washing motor, which, as is well known, is configured to be able to rotate in forward and reverse directions. Note that one end of this motor 31 is connected to the power source 30, and the other end is connected to the first and second reversing switches 15, 21.
The wires are connected as shown in the respective figures. 32 is a well-known starting capacitor, and 33 is a main switch for starting or stopping the operation of the washing machine.

34 indicates a select switch, which selects strong water flow, medium water flow, and
It is composed of three switches 35, 36, and 37 for obtaining a weak water flow.

Note that these switches are configured so that only one arbitrary circuit is closed, and the respective movable contacts 35a, 36a, 37
a constitutes a switching contact, and the first to third fixed contacts 35b, 36 are in contact with the respective movable contacts.
b, 37b are connected to the first and second reversing switches 15, 21 and the intermittent switch 26, respectively, as shown. Next, the operation of the washing machine having the circuit configuration as described above will be explained.

When washing with strong water flow is first desired, the switch 35 in the select switch 34 is closed, and then the main switch 33 is closed. Then, although not shown, a well-known circuit configuration rotates the motor in the time switch, causing the camshaft 1 to rotate. As a result, the first reversing switch 15
The switching contact plate 18 is switchably connected to the first contact plate 16 or the second contact plate 17, and current flows to the motor 31 as shown in FIG. 4A. When operating in this manner, the washing motor 31 rotates in one direction (or in the opposite direction) for a long time, so the water flow in the washing tub becomes a strong water flow.
Next, when attempting to wash with gray water, close switch 36 instead of switch 35.

In this case, the current is supplied to the washing motor 31 via the second reversing switch 21. As described above, the second reversing switch 21 has a shorter reversing cycle than the first reversing switch 15, and current flows to the motor 31 in the reversed state shown at the opening in FIG. In such an operating state, the time for the washing motor 31 to rotate in one direction is shorter than in the above case, so the water flow in the washing tub becomes weaker than in the above case. Next, if you want to wash with weak water, switch 37 in select switch 34
is closed instead of switch 35 or 36.

In this case, the current is supplied to the washing motor 31 via the second reversing switch 21 and the intermittent switch 26, and the current supply state to the washing motor 31 is as shown in FIG. 4C. . That is, the time period during which the switching contact plate 24 of the second reversing switch 21 connects to one of the contact plates 22 or 23 to rotate the motor 31 in one direction is further shortened by opening and closing the intermittent switch 26. For this reason, the motor 31
The rotation time becomes extremely short, and the water flow in the tank becomes even weaker. In this embodiment, the opening/closing state of the intermittent switch 26 is such that the time during which the motor 31 is energized with the second reversing switch 21 connected to one side is uniformly shortened. It corresponds to the switching state. Next, FIG. 5 showing different examples of the select switch 34 will be described.

This figure shows an example in which a switch having a structure of three fixed contacts and one switching contact which is connected to these contacts each time the switch is rotated is used as a select switch, and is similar to the previous embodiment. The select switch is suitable for operation with piano-type -3 push buttons, whereas in this example it is suitable for operation by turning one knob. As described above, in the present invention, when washing is performed, the washing motor 31 is energized via the reversing switch 21, so the washing motor 31 can be rotated while being reversed at predetermined intervals, and the laundry can be washed. It has the effect of preventing tangling.

Moreover, in the case of the above-mentioned washing, since the length of the energization time to the washing motor 31 each time in the above-mentioned operating state can be selected by operating the select switch 34, it is possible to select between medium and weak. It has the advantage of being able to select the type of water flow and washing with a water flow that suits the fabric.

Furthermore, when washing with the weak water flow, even if the intermittent switch 26 is turned on and off during the reversal time of the second reversing switch 21 to obtain the weak water flow, the intermittent switch 26 is a reversing switch. Once each time 21 is reversed,
Since it is designed to be conductive for a short period of time, the washing motor 3
1 repeatedly operates and stops for a short period of time, the direction of rotation can be reversed each time, which has the advantage of ensuring the above-mentioned effect of preventing tangling of the cloth.

l Furthermore, in the present invention, when the strong water flow switch 35 in the select switch 34 is closed when washing, the washing motor 31 is activated through the switch 35 and the first reversing switch 15 which operates in reverse in a long cycle. The motor 317 can be rotated in forward and reverse directions with a long reversal cycle.

On the other hand, when the gray water diversion switch 36 in the select switch 34 is closed, the washing motor 31 is energized through the switch 36 and the second reversing switch 21 which operates in reverse in a short cycle. It can be rotated forward and backward. On the other hand, when the weak water diversion switch 37 in the select switch 34 is closed, the washing motor 31 is energized through the intermittent switch 26 which opens and closes in synchronization with the second reversing switch 21 and the second reversing switch 21. By doing so, the washing motor 3 is turned on only when the intermittent switch 26 is closed for a short time during the period in which the second reversing switch 21 is switched to one side and the other side.
1, the washing motor 31 can be rotated in forward and reverse directions with the same short reversal cycle as in the case of the gray water flow described above, and with a shorter period of rotation. As described above, the present invention has the advantage that washing can be carried out by carefully selecting the water flow suitable for the fabric from among the three water flows: strong, medium, and weak. Furthermore, even if it is possible to select three types of water flow as described above, the washing motor 31 is energized through the energizing path as described above, so the structure is divided into two sets. It can be configured with the reversing switches 15, 21 and the intermittent switch 26 of a simple configuration, which has the effect of simplifying the switch mechanism and making it possible to provide it at low cost.

Furthermore, a cam 2 for operating the three switches mentioned above;
6 and 11 are configured on one axis, so one axis (
The above three types of switches 15, 2 can be activated simply by turning the camshaft 1).
1 and 26 can be naturally synchronized, and a simple drive mechanism for each of the cams is sufficient. On top of that,
Since the three types of cams mentioned above are configured on a single axis, when designing the time switch, the circumferences 3602 of the first and second reversing cams 2 and 6 should be arranged in numbers that are different in size from each other. In the case of the intermittent cam 11, the switch 26 is arranged on the outer periphery of the intermittent cam 11 in correspondence with the arrangement of the protrusions and depressions for switch operation on the second reversing cam 6. It is possible to create the above-mentioned strong, medium, and weak differences simply by forming the unevenness for the operation of the There is also.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a sectional view of the reversing switch mechanism, FIG. 2 is a diagram showing the relationship between each switch and a cam, FIG. 3 is a circuit diagram of the time switch, and FIG. 4 5 is a time chart showing the state of energization to the washing motor, and FIG. 5 is a diagram showing different embodiments of the select switch. 30...Power supply, 31...Washing motor,
15...First reversing switch, 21...
Second reversing switch, 26...intermittent switch.

Claims (1)

[Claims] 1. At the other end of the washing motor, which can rotate in forward and reverse directions and whose one end is connected to one end of a power supply, connect the first and second contacts of the first reversing switch and the first and second contacts of the second reversing switch. The washing motor is connected so that it can rotate forward or backward in accordance with each reversal of the switch, and one end of the intermittent switch is connected to the changeover contact of the second reversal switch, while a select switch having three switches is connected. and one switch in the select switch is connected between the other end of the power supply and the switching contact of the first reversing switch,
Another switch in the select switch is connected between the other end of the power source and the switching contact of the second reversing switch, and the remaining switch in the select switch is connected between the other end of the power source and the other switch in the intermittent switch. The camshaft, which is connected between the two ends and rotated by a clock mechanism, has a first reversing cam, a second reversing cam, and an intermittent cam each having a concave and convex portion around the periphery for operating a switch. At the same time, the first reversing switch, the second reversing switch, and the intermittent switch are attached to the outer periphery of the corresponding cam so as to be activated by the rotation of the first reversing cam, the second reversing cam, and the intermittent cam, respectively. The relationship between the arrangement of the unevenness around the first reversing cam and the arrangement of the unevenness around the second reversing cam is determined by the reversal period of the first reversing switch due to the unevenness of the first reversing cam. is set to be longer than the reversal period of the second reversing switch due to the unevenness of the second reversing cam, and furthermore, the relationship between the arrangement of the unevenness around the second reversing cam and the arrangement of the unevenness around the intermittent cam is as follows. Each time the second reversing switch is reversed by the second reversing cam, the intermittent switch is brought into conduction once by the intermittent cam.
A time switch for a washing machine, characterized in that the time switch is set to be extremely shorter than the cycle of reversing operation of a reversing switch.