FR2753853A1 - DEVICE FOR DISPENSING TRANSPORTATION TITLES OR THE LIKE EQUIPPED WITH A ROTARY CONTROL DEVICE WITH TACTILE EFFECT - Google Patents

Abstract

The control member houses a stepping motor (MOT), of hybrid type, comprising a rotor (ROT) whose rotation shaft corresponds to that of the control member and on the circumference of which are arranged teeth ( DR) of alternately different polarities and magnetized by a permanent magnet, and a stator (STA) comprising at least first to fourth magnetic poles (PM1 to PM4) arranged around the rotor and each having teeth (DS), at least a first coil (BA) wound in the same direction around the first and third opposite poles (PM1 and PM3) and a second coil (BB) wound in the same direction around the second and fourth opposite poles (PM2 and PM4), the arrangement of teeth (DS) of the stator with respect to that of the teeth (DR) of the rotor allowing the inductive generation in the first and second coils (BA and BB) of two trains of pulses (TR1 and TR2) according to the rotation of the rotor , and the processing means (CT1, CT2, UT) being connected to one terminals (EA2 and EB2) of the first and second coils (BA and BB) for receiving and processing these two trains of pulses and deducing therefrom said electrical quantities.

Description

A Ticket dispensing device or the like equipped with a

  The present invention relates to a ticket dispensing device or the like equipped with a

rotary control with tactile effect.

  It finds a particular application in distribution

  tickets or the like in exchange for payment.

  There are already known titles dispensing devices which use a rotary button to select the display of the title selection parameters. For example, in French Application FR-A-2 683 651, the Applicant has described a ticket dispensing device which comprises a rotary button capable of being driven by a user to select the display of a parameter for selecting the ticket. The rotary button includes an optoelectronic device which makes it possible to supply electrical quantities corresponding to the direction of rotation of the rotary button as well as its angular displacement. Such an optoelectronic device has the disadvantage of being relatively expensive and of exhibiting electrical wear in

  reason of the light source used.

  The present invention overcomes these drawbacks.

  It starts from a device distributing a trans-

  port or the like, comprising: means for displaying at least one parameter relating to the selection of the title; - a freely rotating control member capable of being driven by a user to select the display of said parameter; - processing means suitable for selecting the display of said parameter, using electrical quantities which correspond to the direction of rotation and the angular displacement of the control member; - means for validating said display selection command; and - means of issuing a title in response to said

validation.

  According to a general definition of the invention, the

  control houses a stepping motor, hybrid type, compressor

  nant a rotor whose rotation shaft corresponds to that of

  the control member and on the circumference of which are

  placed teeth of alternately different polarities and magnetized by a permanent magnet, and a stator comprising at least first to fourth magnetic poles arranged around the rotor and each having teeth, at least one first coil wound in the same direction around the first and third opposite poles and a second wound coil

  in the same direction around the second and fourth poles oppo-

  sés, the arrangement of the stator teeth relative to that of the rotor teeth allowing the inductive generation in the first and second coils of two pulse trains as a function of the rotation of the rotor, and the processing means being connected to the one of the terminals of the first and second coils for receiving and processing these two pulse trains

  and deduce therefrom said electrical quantities.

  According to a particular embodiment of the invention, the angular distance between two successive teeth of the rotor is

  different from the angular distance between two successive teeth

  of the stator, the motor pitch being proportional to

said difference.

  In practice, the stepper motor includes a high number of

  not worth a few degrees.

  For example, the step of the stepper motor is 1.8.

  The Applicant has also posed the problem of providing a rotary control member which provides a tactile effect when in particular the change of the display of the parameter of

title selection.

  She also finds a solution to this problem by using

  cleverly inductive effects of the stepper motor.

  Thus, according to another aspect of the invention, the processing means are suitable for activating said first and second coils to inductively brake or block the rotation of the control member as a function of the parameter displayed on the display means or in response to a

predetermined condition.

  Such a device has the advantage of using the same coils for the inductive braking of the control member as those used for detecting the rotation of the control member. However, it has the disadvantage of requiring a brake control electronics with high internal impedance so as not to influence the reading of the pulses on

the coils.

  A solution to this problem consists, according to the invention, in addition equipping the stator with a third coil strongly coupled with the first coil and wound in the same direction as the first coil around the first and third magnetic poles and with a fourth coil. strongly coupled with the second coil and wound in the same direction as the

  second coil around the second and fourth magnet poles

  ques and activate said third and fourth coils to inductively brake or block the rotation of the control member according to the parameter displayed on the means

  display or in response to a predetermined condition.

  Advantageously, the processing means are able to activate the first and second coils or the third and fourth coils according to an intensity and a duration chosen according to the parameter displayed on the display means.

  or in response to a predetermined condition.

  Other characteristics and advantages of the invention

  will appear in the light of the detailed description below.

  after and attached drawings in which: - Figure 1 is an overview of the front panel of a ticket vending machine equipped with a rotary control member with tactile effect according to the invention; - Figure 2 is a front view of the control member according to the invention; - Figure 3 is a cross-sectional view of the control member of Figure 2; - Figure 4 is an exploded view of the constituent and essential elements of the control member according to the invention; - Figure 5 is a simplified view of the stepping motor

  two coils housed in the control unit according to the invention

  tion; and - Figure 6 is a simplified view of the stepping motor

  four coils housed in the control unit according to the invention

  tion. In Figure 1, there is shown the front facade FAC of a ticket distributor or the like in exchange for payment. In a known manner, the distributor comprises an ECR screen intended to display at least one parameter relating to the selection of the title. An ORG free rotation control unit is arranged below the screen. This control member is cylindrical or ovoid in shape. Part of the external face of the cylinder (substantially half) is flush with the surface of the front face of the dispenser while the other part of the external face of the cylinder is housed inside

  front panel of the dispenser.

  The front of the dispenser is supplemented by means of VAL and ANN validation (buttons with keys) of the display selection command obtained by the drive by a

  user of the freely rotating control member.

  In the case of the distribution of a security in exchange for a payment, the security distributor further comprises means for entering payment PAI, for example of the electronic payment type, comprising a CLA keyboard and a

  LEC electronic payment card reader.

  DEL delivery means of a title in response to the

  validation complete the front of the dispenser.

  Referring to Figure 2, the ORG control member is ovoid in shape. The horizontal axis of rotation of the control member AX is parallel to the longest side of the control member. The control member is freely rotatable between two forks or the like FOUl and FOU2 secured to the chassis of the front face of the distributor using means

  fixing FIX1 and FIX2 of known type.

  Referring to Figure 3, a MOT stepper motor is housed in the control member which consists of two shells

  COQ1 and COQ2 nestable one inside the other.

  For example, the shells are made of an alloy

  aluminum treated by anodic oxidation.

  The stepper motor is connected to processing means

  (not shown) by FI connection wires.

  Referring to Figure 4, the stepper motor comprises a rotor (not shown) whose rotation shaft corresponds to the axis of rotation AX of the control member. Motor not

  MOT step is composed of a parallelepiped carcass

  dique, integral with the axis of rotation AX using a U-shaped BAG ring which completely encloses the housing containing the stepping motor. Bearing and circlip-type means ROUi and ROU2 complete the means for guiding the free rotation of the stepping motor. The stepping motor is of the hybrid type, that is to say that the rotor ROT is with permanent magnet on the one hand, and the couple rotor / stator presents a structure likely to introduce

  a change in reluctance on the other hand.

  For example, the stepper motor is the one sold by the

  MINEBEA company (Japanese company) under the reference 14 PM-

  M201-T2 six-wire (Figure 6) or four-wire (Figure 5).

  The Applicant has noticed that this hybrid stepper motor is

  capable of supplying electrical quantities which correspond to

  tooth in the direction of rotation and angular displacement of

  the control member containing this stepping motor.

  With reference to FIG. 5, the 4-wire stepping motor comprises a rotor ROT on the circumference of which are arranged teeth of alternately different polarity DR and magnetized by a permanent magnet included in the

rotor.

  The stator STA comprises at least first to fourth magnetic poles PM1 to PM4 arranged around the rotor and having

each of the DS teeth.

  A first BA coil is wound in the same direction around

  first and third opposite poles PM1 and PM3.

  A second coil BB is wound in the same direction around

  second and fourth opposite poles PM2 and PM4.

  One terminal EA1 of the coil BA is connected to ground and the other terminal EA2 of the coil BA is connected to a shaping amplifier followed by a peak detector CT1 capable of delivering synchronous logic pulses TR1 with

  the analog signal present at terminal EA2.

  Similarly, one terminal EB1 of the coil BB is connected to ground and the other terminal EB2 of the coil BB is connected to a shaping amplifier followed by a peak detector CT2 suitable for delivering logic pulses TR2 synchronous with

  the analog signal present at terminal EB2.

  The advantage of such shaping and detection circuits CT1 and CT2 is to make the generation of the logic pulses TR1 and TR2 independent of the speed of rotation of the rotor while maintaining the synchronism of the pulses.

relative to the engine pitch.

  It is the arrangement of the stator teeth DS with respect to that of the rotor teeth DR which here allows the inductive generation in the coils BA and BB of the two pulse trains TR1 and

  TR2 depending on the rotation of the rotor.

  Processing means UT, of microprocessor type, are connected to circuits CT1 and CT2 to process the two pulse trains TR1 and TR2 and deduce therefrom the direction of rotation of the control member, its angular displacement, and therefore its

rotation speed.

  From these pulse trains, the processing means UT are thus able to select the display of a parameter using the electrical quantities supplied by the

step-by-step engine.

  In practice, the angular distance between two successive teeth

  ves DR of the rotor is different from the angular distance between two successive teeth DS of the stator, the motor pitch is

  thus proportional to this difference.

  The choice of this difference makes it possible to define a number

  high of steps worth a few degrees.

  For example, the step of the stepper motor is 1.8.

  Surprisingly, the Applicant has observed that this stepping motor can also confer a tactile effect on the control member. For this, the processing means UT are suitable for activating said first and second coils BA and BB to inductively brake or block the rotation of the control member as a function of the parameter displayed on the display means or

  in response to a predetermined condition.

  For the activation of the coils BA and BB, the processing means UT deliver through a control circuit CT3 a direct current signal, from 0 to 12 Volts for example,

  at terminals EA2 and EB2 of the coils BA and BB.

  Advantageously, the braking control circuit CT3 has a high internal impedance IM1 and IM2 so as not to influence

  reading the pulses on the coils BA and BB.

  The stepping motor described with reference to FIG. 5 is of the bipolar type insofar as the coils BA and BB are

  crossed by currents in both directions.

  As a variant (FIG. 6), the stepping motor is of the unipolar type in which the coils are traversed by

currents in one direction.

  The unipolar stepper motor is here 6-wire. Its rotor

  ROT is identical to that described with reference to Figure 5.

  Its stator is different from that described with reference to FIG. 5 in the measurement o in addition to coils BA and BB arranged in an identical manner to FIG. 5, it now comprises a third coil BC strongly coupled with the first coil BA and wound in the same direction as the first coil BA around the first and third magnetic poles PM1 and PM3 and a fourth coil BD strongly coupled with the second coil BB and wound in the same direction as the second coil BB around the second and fourth

PM2 and PM4 magnetic poles.

  The coils BA and BB are no longer activated by the processing means. On the contrary, the control circuit CT3 (without high internal impedance) now activates the third and

  fourth coils BC and BD to brake or block inductive-

  ment the rotation of the ORG control member according to the parameter displayed on the display means or in response to

a predetermined condition.

  For the activation of the coils BC and BD, the processing means UT deliver through the control circuit CT3 a DC signal, from 0 to 12 Volts for example, at the terminals EC1 and ED1 of the coils BC and BD. EC2 and

  ED2 of the coils BC and BD are grounded.

  Thanks to the controlled activation of the coils BA and BB (bipolar motor) or BC and BD (unipolar motor), the user feels a tactile effect on the ORG control member which can be

  depending on the change of the displayed item and selection-

  born. It should be noted that this tactile effect is totally different from conventional devices such as those known by the term "mouse" in that the change of heading caused in particular by the rotation of the control member can produce braking of said member. ordered

  or a hardening of the rotation of said control member.

  It should be noted that the braking effect may be constant, or else dependent on certain circumstances such as the selected item, or the absence of user action during a predetermined time delay, or even the instantaneous speed printed at l control unit

by the user.

  When braking is dependent on the selection item-

  born, it is the microcomputer (processing means) managing the screen which will control the intensity of the braking as well as its duration by determining the control signal from the circuit CT3. It should be noted that this programming makes it possible to avoid erroneous choices for the user by preventing an involuntary movement of the control member which could trigger

wrong selection.

  In practice, when braking is constant, the user feels inductive "notches" offering a certain resistance

  to the rotation of the ORG control member.

Claims (7)

Claims   1. A ticket dispensing device or the like, comprising: - display means (ECR) of at least one parameter relating to the selection of the ticket; - a freely rotating control member (ORG) capable of being driven by a user to select the display of said marker; processing means suitable for selecting the display of said parameter, using electrical quantities which correspond to the direction of rotation of the control member as well as to its angular displacement; validation means (VAL and ANN) of said display selection command; and - means for delivering (DEL) a ticket in response to said validation, characterized in that the control unit houses a stepping motor (MOT), of the hybrid type, comprising a rotor (ROT), the l rotation shaft corresponds to that of the control member and on the circumference of which are disposed teeth (DR) of alternately different polarities and magnetized by a permanent magnet, and a stator (STA) comprising at least first to fourth poles magnetic (PM1 to PM4) arranged around the rotor and each having teeth (DS), at least a first coil (BA) wound in the same direction around the first and third opposite poles (PM1 and PM3) and a second coil (BB ) wound in the same direction around the second and fourth opposite poles (PM2 and PM4), the arrangement of the stator teeth (DS) relative to that of the rotor teeth (DR) allowing inductive generation in the first and second coils (BA and BB) of two x pulse trains (TR1 and TR2) depending on the rotation of the rotor, and the processing means (CT1, CT2, UT) being connected to one of the terminals (EA2 and EB2) of the first and second coils (BA and BB) to receive and process these two   pulse trains and deduce said electric quantities therefrom   ques. 2. Device according to claim 1, characterized in that the angular distance between two successive teeth (DR) of the rotor is different from the angular distance between two successive teeth (DS) of the stator, the pitch of the motor being   proportional to said difference.   3. Device according to claim 1 or claim 2, characterized in that the stepping motor comprises a   high number of steps worth a few degrees.   4. Device according to claim 3, characterized in that that the pitch is of the order of 1.8.   5. Device according to any one of the preceding   claims, characterized in that the processing means   ment (CT3, UT) are suitable for activating said first and   second coils (BA and BB) to brake or block inductive-   ment the rotation of the control member (ORG) according to the parameter displayed on the display means or in response to a predetermined condition.   6. Device according to claim 1, characterized in that the stator (STA) further comprises a third coil (BC) strongly coupled with the first coil (BA) and wound in the same direction as the first coil (BA) around the first and third magnetic poles (PM1 and PM3) and a fourth coil (BD) strongly coupled with the second coil (BB) and wound in the same direction as the second coil (BB) around the second and fourth magnetic poles (PM2 and PM4 ) and in that the processing means (CT3, UT) are suitable for activating said third and fourth coils (BC and BD) to inductively brake or block the rotation of the control member (ORG) according to the parameter displayed on display means or in response to a predetermined condition.   7. Device according to claim 5 or 6, characterized in that the processing means (CT3, UT) are capable of activating the first and second coils (BA and BB) or the third and fourth coils (BC and BD) according to a intensity and duration chosen according to the parameter displayed on   the display means or in response to a predefined condition finished.