FR2634944A1 - PERFECTIONALLY PRESELECTED DISPLAY DEVICE FOR PROGRAMMERS - Google Patents

Abstract

The washing machine programmer comprises a block of program cams 1 driven in rotation to carry out several washing programs, a selector member 3 of the chosen program, integral in rotation with the operating shaft 4, a cooperating control member 9 with the selector member 3 and arranged to operate indirectly 11, 13, 15, 16 a changeover contact supplying in one of its two positions a rapid advance motor of the cam block 1 and in the other of its two positions the stepping motor of the cam block 1. The control member comprises a lever 9 articulated on the selector member 3 to cooperate with a notch 51 integral in rotation with the cam block.

Description

The present invention relates to the field of machine programmers

  electrical appliances including washing machines or dishes and more specifically the display device preselecting one of the wash programs chosen by the user. The programmers of this type comprise a program cam block arranged to be rotated under the action of a geared motor unit in order to carry out pre-established programs and a preselection device.

one of said programs.

  Such devices are already known and in particular document FR 85 14 242 in the name of the Applicant teaches a preselection device integral with a maneuvering axis whose angular positioning allows to choose one of the various available programs; this selector member comprises a control member arranged to control an inverting electrical contact allowing in one of its two positions to supply a motor for fast forwarding of the cam block to the starting position of the preselected program and in the other of its two positions to supply the motor with step advance of the cam block according to the preselected program and the control member comprising an arrangement of arms mounted inclined relative to the maneuvering axis and each connected by an elastic hinge to a moving means in

  translation on said operating axis.

  This type of arrangement has the drawbacks of a relative complexity of the parts resulting in a large number of functional dimensions. it is to remedy this that the present invention aims; Thus, the present invention relates to a preselected display device for a programmer comprising a selector member mounted integral with a maneuvering axis whose angular positioning makes it possible to choose one of the various available programs; this selector member comprises a control member arranged for, under the action of the selector member, to cooperate with means for starting the cam block, and to control an inverting electrical contact enabling, in one of its two positions, to power a fast forward cam motor to the start position of the preselected program and in the other of its two positions

  to supply the motor with step advance of the cam block.

  The control member comprises a rocking lever cooperating with a sleeve mounted to move in translation on the

along the axis of maneuver.

  The invention will be better understood from the description

  following of the preferred embodiment of the device of the invention with reference to the accompanying drawings in which: Figure 1 shows a section of the device according to the first position of the organ

control.

  FIG. 2 represents a section of the device following the second position of the organ

control.

  Figure 3 shows a plan view of the controller. According to the example described, the programmer comprises a cam 1 whose profiles correspond to the progress of the various programs. In known manner, said cam is rotated step by step by means of a geared motor unit and a ratchet device; furthermore, a so-called fast forward motor can drive the cam block to the starting position of the selected program via a freewheel device. feeding one or the other of these

  two motors is through an inverter contact 2.

  A program selection cam, the selector member 3 is integral with the operating axis 4 of the programmer; the periphery of its crown comprises notches 31 whose number and position correspond to the number and the starting positions of the available programs of the

programmer.

  A ring 5 comprising a notch 51 provided with a release ramp 52 is housed in a countersink of the cam block 1. a keying 6 make them mutually integral in rotation. The selector member 3 serves to center the ring 5, so

cam lock 1.

  The wall of the selector member 3 parallel to the operating shaft 4 comprises a slot 7 and its plane comprises * t facing the light 7 two protuberances Ba, 8b for *; u2O allow the pivoting of the control member a

lever 9.

  The lever 9 made of rigid material, here made of metal, comprises a planar face extending in a plane substantially parallel to the plane of the selector member 3, perpendicular to this plane a hook-shaped finished cap 10 allows the

  pivoting of the lever 9 around the protuberances 8a, 8b.

  : The end of the lever 9 facing the maneuvering axis 4 is fork-shaped whose two arms surround said axis about 180 degrees; the opposite end of the lever 9 is finished in the form of a beak 12. which extends

  through the light 7 to cooperate with the ring 5.

  the fork 11 of the lever 9 can maneuver a sleeve 13 movable in translation about the axis 4 against means -44-

  resilient return here a coil spring 14.

  the movement of the sleeve 13 causes the pivoting of a first lever 15 acting on a second lever

  multiplier 16 to operate the changeover contact 2.

  When starting up the washing machine, all the program selection parts are located according to FIG. 1: the end 12 of the lever 9, under the action of the spring 14, is housed in the notch 51 of the ring 5, the changeover contact 2 is in the supply position of the

  step motor of the cam lock 1.

  The user, when selecting one of the washing programs in rotation, here in the direction of clockwise, the control button secured to the axis 4 and the selector member 3 in order to position the notch 31 corresponding to the chosen program facing the nose of a positioner lever, not shown in the drawing, the end 12 of the lever 9 follows the clearance ramp 52 of the notch 51 in a flip-flop movement around the protuberances 8a, 8b and the fork-shaped end 11 of said lever 9 actuates in translation the ring 13 by compressing the spring 14; the levers 15 and 16 invert the contact 2 which can supply the fast-forwarding motor: all the program selection pieces are

  located according to the arrangement of Figure 2.

  The fast-forwarding motor then rapidly rotates the cam block 1 until the notch 51 is repositioned facing the end 12 of the lever 9 which tilts under the effect of the force generated by the spring 14, the contact 2 is reversed again to feed the motor in advance

  step 1, the wash cycle starts.

  Another feature of the invention is to allow without damaging the system, the positioning of the control button between two starting program positions: -5- the friction force of the spout of the aforementioned positioning lever on the periphery of the organ selector 3 between two notches 31 is sized to be less than the effort

  friction of the lever 9 on the ring 5.

  As a result, the ring 5 integral in rotation of the cam unit 1, by the action of the fast-forward motor, will rotate the selection member 3 until a first notch 31 is positioned under the beak of the lever.positionneur'and immobilizes the selection member 3; from this moment only the cam-block 1 and the ring 5 continue to turn until the notch 51 is positioned in front of the spout 12 of the lever 9 which lever then toggles, thus putting it as explained above, the machine in condition to start the program of

- washing..

  The present invention makes it possible to produce washing machine programmers with a preselected display of the chosen program of production.

  particularly robust, reliable and inexpensive.

-6-

Claims (3)

  1 - Preset display device for a programmer comprising a program cam block (1) arranged to be rotated and unrolled several successively established programs, and a selector member (3) integral in rotation with a maneuvering axis (4). ) whose angular positioning makes it possible to select one of the available programs, comprising a control member (9) arranged to control an inverter contact (2) moving in one or the other of the two positions and characterized by the fact that the control member (9) is a rocking lever, one of its ends being able to cooperate with a notch (51) integral in rotation with the cam block (1), the other of its ends cooperating with a sleeve ( 13) slidably mounted on the drive shaft (4) against the action an elastic return (14).   2 - Display device according to claim 1 wherein the lever (9) comprises a yoke (10) articulated around two protuberances (8a, 8b) rising perpendicularly above the plane of the organ selector (3).   3 - Display device according to claim 2 wherein the lever 9 cooperates by sliding contact against the face of a ring (5) mounted integral in rotation by keying (6) of the cam block (1) inside the a countersink formed in one of the two ends of the cam block, the notch (51) with its release ramp (52) is provided in said ring (5).