DE8321107U1 - Program switching device - Google Patents

Description

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SIEMENS AKTIENGESELLSCHAFT Our reference Berl in and Munich VPA 83 P 3 2 2 8 OE

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The invention relates to a program switching device, in particular for household machines, with a program cam drum, a timer cam wheel and a Time expansion ring from a drive motor via a stepping mechanism, its transport element in different Delusions intervene, are driven.

In a known program switching device of the above-

The type mentioned (DB-OS 2 040 464) is the time expansion ring moved by the transport blade until the indicator cams are in contact with the program drum and take them with them, until the toothing in the program drum becomes effective again is. This means that the program drum is only so much Steps must be carried out until the time expansion ring is taken away from the program drum with another stop. The invention is therefore based on the object a Ptogram switch device of the type mentioned above create, with which with simple means and simple opening « build a multiplication of the step times given by the timer on practically all cam drum positions is feasible. In the case of a program switching device of the type mentioned above, this is thereby achieved in a simple manner achieved that the 2eit expansion ring against the transport direction resiliently connected to parts fixed to the housing is. In this case, it is advantageous, in order to obtain a defined long-term, if the transport element is controlled by the timer cam wheel and the time expansion ring with the toothing of the program cam drum in one can be brought to hand. The time expansion ring can be Speaking training of the spring force and the friction conditions can be brought into the desired position. However, it is particularly advantageous to also use a longer time-La 2 Syr / T3.07.1983

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To overcome intervals against the spring force if a reverse rotation lock is provided for the time expansion ring, whose step-by-step locking function can be canceled by the formation of teeth in the program cam drum. To achieve a simple, compact design, it has proven to be advantageous if the transport element can be operated jointly via a rocker are tappet provided, one of which engages in control function of the Zeitgebernokcenrad and the time expansion ring in the teeth of the program cam drum and a r, on the other takes over control depending on the Zeitgebernockenrad with the teeth of the time extension ring in engagement. Furthermore, it is advantageous in this direction if the other tappet consists of three single tappets connected to one another via an angular part in one effective direction. Furthermore, it is advantageous in terms of construction cost and size if the toothing of the time expansion ring and the timing cam wheel with the incidence of the tappet corresponding control openings is arranged within the internally toothed Progrärnfflnocketttrommei.

An exemplary embodiment according to V of the invention is described and the mode of operation in more detail with the aid of the drawing explained.

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1 shows the program switching device according to the invention in principle outline, partly in section, Fig. 2 is a sectional view along the line II-II according to Fig. 1.

The program switching device consists of a Programmnoekentrommel 1 and a timer cam wheel 2, both of which are designed as a hollow drum, as well as a ζ \ also designed as a hollow cam drum

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expansion ring 3. The cams 4 work together with schematically indicated cam contacts 5. The program cam drum 1 has a mounting attachment 6 which is rotatably mounted in a front plate 7. On the open side, the program cam drum is equipped with a 2-cylinder-shaped extension 8, on the outside of which the timer cam wheel 2 is rotatably mounted and on the inside of which there is an internal toothing 9. Within the toothing 9 is the toothing 10 of the timing gear 2 and also the time expansion ring 3 with (} the toothing 11 for the transport and the locking toothing 12. An annular projection 13 lies between the internal toothing 9, the program cam drum 1 and an annular extension 14 of the toothing 10 of the timer gear 2. The tappets 15 to 19 engage in the toothing and are mounted in the rocker 22, which is pivotable about the central axis 21 of the drum by the motor-driven eccentric 20, against springs not shown in detail. The tappets 16 and 19 are connected to one another in an effective direction via an angular part 23. A reverse rotation lock 25, which is pivotably mounted about the bolt 24, is pressed into the locking toothing V-- 12 in the time expansion ring 3 by the tension spring 26, which is precisely supported »As long as a toothing 27 in the program cam drum T coincides with this toothing. A stop 28 on the time expansion ring 3 limits the restoring movement of the time expansion ring, ι that by the spring 29, which is on the one hand at an

föfmüng 30 of the time expansion ring 3 and on the other hand is supported on a housing-fixed projection 31 as a tension spring. The following is carried out for the function of the program switching device according to the invention: The plungers 15, 16 and 17, which are controlled by the toothing 10 of the timer cam wheel 2 \ , can - as before - change positions

the program cam routine. The tappets 18 and 19 are intended for long-term sessions. Now falls the

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^ Plunger 16 through the control slot 32 of the toothing 10,

so the plunger 19 becomes a collapse via the angle part 23

j5 released into the toothing 11 of the time expansion ring 3.

The time ring 3 is thereby moved forward by one position in the Drth direction. If there is no toothing 27 in the program cam drum 1 for the reverse rotation lock 21 , the reverse rotation lock cannot intervene in the locking teeth 12, so that no long-term step takes place. The time expansion ring 3 is then brought back by the tension spring 29 against the direction of rotation as far as the stop 28. After (Λ taken place long time step of the transport of the carried Prο-grammnockentrommen when the time elongation ring 3 has been so far transported in the rotational direction that the plunger 18 is released by a control slot 33 in the annular projection 13 of the time elongation ring 3 to be incident into the internal toothing 9 of the cam drum, and if there is also a control slot in the annular projection 14 of the timer cam wheel 2. If several control slots are arranged one after the other on the time expansion ring, three 12-minute steps can be carried out one after the other or one 36-minute step on the cam drum . the formation of these steps depends on the spring volume of the mainspring 29th the return '• J rotating lock is released WCAN by the toothing 27 of the program cam drum, the reverse rotation lock 25 from the locking teeth T2 lifted is. the plunger 18 is in the rocker arm through a corresponding web the annular projection 14 into the Sc hwinge is pushed back against the force of the spring acting on the plunger. 30th

The inventive design of the program control device with a relatively large number of plungers has the advantage over the use of a plunger as a plunger, which passes through both the toothing of the timer cam wheel and the time expansion ring for transporting the program cam & / λ drum, that either ψ after tooth formation 34 and 35 of the internal toothing

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in the program cam drum at one position, e.g. a 12-minute step or a 20-minute step can be done on the cam barrel. This can be done as follows: Is one for the tappet 18 Toothing 34 is present, there is a 12-minute step. If there is no tooth of the toothing 34, the time expansion ring 3 is transported on with the plunger 19, until the plunger 19 hits the cam drum toothing 35 through an opening in the time expansion ring 3. This takes a 20-minute step.

6 claims 2 figures

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Claims (6)

•• tat · ··· t - 6 - VPA83P3228DE Proverbs 1. Program switching device, especially for household machines with a program cam drum, a time encoder cam wheel and a time expansion ring, whereby program cam drum, Zeitgeoernockenrad and time expansion ring from a drive motor via a stepping mechanism, its transport element in different gears engages, are driven, characterized in that the time expansion ring (3) counter to the transport direction is resiliently (29) connected to the housing-fixed parts (31). 2. Program switching device according to claim 1, d a - characterized in that the transport member (18) is controlled as a function of the timer cam r & d (2) and the time expansion ring (3) with the teeth (9, 33) of the program cam drum (1) in engagement can be brought. 20th 3. Program switching device according to claim 1 or 2, characterized in that one Reverse rotation lock (25) for the time expansion ring (3) is provided, the step-by-step locking function of which is formed by toothing can be canceled in the program cam drum (1). 4. Program switching device according to claim 1, 2 or 3, characterized in that as Transport member are provided jointly via a rocker (22) actuatable plungers (15-19), one of which (18) as a function of the timing of the timing cam wheel (2) and the time expansion ring (3) in the toothing (9) the program cam drum (1) engages and another (19) as a function of the timing of the timing cam wheel (2) with the toothing (11) of the time expansion ring (3) comes into engagement. I I I I Il • «•• li ·· ·· · ·· mm -Ί- VPA 83P32280E 5. Program switching device according to claim 4, characterized in that the other Plunger (19) made up of two individual plungers (16, 19) connected to one another via an angle part (23) in one effective direction consists. 6. Program switching device according to one of the preceding Claims, characterized in that provided with internal teeth (9) within Program drying drum (1) the teeth (10, 11) {Λ of the time expansion ring (3) and the timer cam wheel (2) is arranged with the incidence of the plunger corresponding control openings (33).