DE1239760B - Switching device for a program, especially for washing machines - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

HOIh

German KL: 21c-44

Number: 1239 760

File number: M 57357 VIII d / 21 c

Filing date: June 28, 1963

Open date: May 3, 1967

The invention relates to a switching device for a program unit, in particular for washing machines, with mechanically advanced program roller.

For household machines, in particular washing machines, program works are known in which a Control motor operated a continuous revolving reversing mechanism for the washing motor and via a mechanical indexing device a time program for the individual washing processes. In the case of simple programs, these programs work more rigidly Connection with each other.

It is also already known that the pawl drive for the time program is temporarily ineffective make so that a certain state in the washing machine, z. B. a certain suds temperature, adjusts. This is done by an electromagnet, which is triggered by a contact from the program mechanism is controlled and which disengages the indexing pawl when switching on, and until a thermostat for temperature control switches off the electromagnet and with it puts the mechanical indexing device back into operation. This electromagnet is only used to make the uninterrupted transport for the main program temporarily ineffective do.

There are also known program switching devices with a mechanically advanced program roller, according to the selected program by means of a switching magnet either gradually or can be operated intermittently at high speed. The program memory is transported here via gear transmission, the magnet having an arm that carries a gear. This gear must be brought into engagement with other gears when a certain power is achieved via the magnetic coupling should be transferred. Relatively large adjustment forces are required here.

The invention is based on the object of creating a switching device for a program unit, in which gear ratios are dispensed with because of the difficulties involved and in which a simple and reliable transport device for the program switching mechanism is created will.

To solve this problem, a switching device is proposed according to the invention, in which the control magnet acts against the force of a return spring on a pawl arrangement and brings this into engagement with the ratchet wheel or the continuously rotating cam disk, so that switching device for a program mechanism,
especially for washing machines

Applicant:

Metzenauer & Jung G. mb H.,
Wuppertal-Elberfeld, Deutscher Ring

Named as inventor:

Siegfried Alter, Solingen-Graefrath

When the control magnet is switched on, the program roller is transported.

In the practical version, the pawl of the ratchet wheel of the program roller is articulated on one pivotable lever mounted, its with the cams of the continuously rotating cam disk interacting stop piece by means of the return spring against a stop outside of the cam engagement is pulled and against the force of this return spring by the movable armature of the Control magnet can be pivoted into the cam engagement area via a pivot lever. Here the pawl is kept disengaged from the ratchet wheel by the return spring until the pawl engages the ratchet wheel against the force of the return spring from the control magnets is brought. Finally, another ratchet lever with a pawl of an additional ratchet wheel are arranged, which is kept in constant engagement with the cam disk by a tension spring is.

In the drawing are in the F i g. 1 to 3 three exemplary embodiments of switching devices according to of the invention shown schematically.

According to FIG. 1 1 drives the control motor of the program production work ^v la via a shaft a cam disc 2 for the occasional conveyance of the main program on and one or more cam disks 3, which handle a continuous, controlled by contacts 4 program.

The ratchet lever influenced by the cam disk 2 is in contrast to known program mechanisms 5 not in engagement with the cam disk 2, but is by a return spring 7 against a Stop 8 pulled. A transport of the ratchet disk 14 and arranged next to the cam disk 2 program linked to it via wave 14 a

709 578/243

Claims (1)

3 4 roller 15 therefore does not take place. Only when the coil is required, because it is only excited by springs on the Mechades control magnets 9 and acts through the nik and a large stroke makes an adjustment to the closing movement of the armature 9 α via a buffer - small tolerances unnecessary,
spring 11 the lever 10 the ratchet lever 5 and the If there are no too high demands on the life pawl 13 against the return spring 7 in engagement 5 duration of the device, then a union with the cam 2 brings, a transport can be made possible that the control magnet 9 of the pawl disc 14 take place. Here, according to FIG. 2 acts directly on the pawl 13, buffer spring 11 be stronger than the return spring 7th which must be arranged in such a way that they have to carry out load because both springs are only constantly disengaged without a spring 7, however be weak io while the ratchet lever 5 a directly in the Einausgebilden, so that one with a small handle with the cam 2 remains and constantly sized control magnets 9 solve the task under the influence of the return spring 7, the back and forth movements executes. To transport the program The coil of the control magnet 9 can still be excited in various ways via the ratchet disk 14. In this case, it is necessary to excite the control magnet 9, which takes into account that in this case the pawl 13 can only be transported directly over a gram if the magnet presses an intermediate spring 11 down and the engagement is switched. In general this is brought about by using the ratchet wheel 14,
a pulse generator - not shown - in certain An advantageous further development is shown in FIG. 3 time intervals take place, e.g. B. represented by the contact 18. 20, from which it can be seen that the short-If the pulse is only present for a short time, the program is no longer directly switched by the control program unit by one step. motor 1 is driven, but also via. If the pulse is present for a longer period of time, so many steps a pawl lever 20, the pawl 22 and the clinin are executed in a short time sequence until kenrad 23 is controlled by the cam disk 2. In contrast to the ratchet lever 5 by switching off the pulse generator, the overdrive 25, the lever 20 is terminated. by the spring 21 constantly in engagement with the cam As an example for influencing the control pulley 2 kept. By these stepping solenoids 9 by means of a temperature regulator of the washing direction, which is common per se, it is achieved that automatic, the circuit with the contacts 16, the cam rotating at a higher speed and 17 serve. The contact 17 provides the thermal disk 2 without the interposition of a gear state contact, which is a relatively slow adjustment of the congregation when a one is reached Temperature closes. Who does in program measure 25. Werk-controlled contact 16 prepares the excitation of the one according to FIG. 3 built program work would Control magnet 9 when switching on the contact in a continuous sequence of the rotating 17 before. As soon as this condition occurs, the cam disk 2 starts the reversing program with the ken lever 5 in engagement with the cam 2 GE contacts 25 adjust while the washing pro- and the program work by one step gram with the contacts 16 only in larger time switched on, whereby the program roller 15 intervals depending on the excitation of the control magnet 9 contact 16 opens immediately. This eliminates the need to press. excitation of the control magnet 9, and the transport 40 It is an essential advantage that the- after this step has been carried out, the same cam disk 2 is used for both the reversing broke until another contactor, e.g. the program as well as for the further switching of the Contact 18 of the pulse generator, for which the main program time intervals can be used and through appeals to. the choice of the two equal parts The control magnet 9 thus allows a completely free 45 ratchet drives on complicated intermediate gears rapid design of the program execution by doing without and also such a high rotational speed it allows the switching of the main program of the number of the actuating disc 2 that for the many different types of pulse generators possible. Main program in this way a rapid transport power. In this simple way it is possible to hide certain program parts Pulse generator for the time intervals as well as the one that will be. Thermostat for compliance with the set tem- The control magnet 9 can also additionally Actuate temperatures and a pressure switch to control the contacts, the switching tasks within the Exercise water level in the machine as well as various programs. In Fig. 1 is a dene other security-serving monitoring of such contact 26 indicated,
Organize an immediate advance of the program 55 cause work. Control contacts on the pro claims:
Grammwerk 16, 15 itself can make limited quick runs within certain program sections 1.Switching device for a program work, if they are switched by a selector switch in particular for washing machines, with a mechadic circuit of the control magnet 9, the program roller that is moved forward. Due to the special design of the speaking the selected program by means of a control magnet as a pure adjusting element, switching magnets either step by step or absatzihm do not require any power output, since it can be operated in overdrive because the power flow between the drive motor and the program is characterized by the control unit does not intervene immediately. It can be made very small and light due to the magnet (9) against the force of a return food, and spring (7) acts on a pawl arrangement (5, 13) (14) are prevented. Exact adjustment is not possible or the continuously rotating cam