EP1930794B1 - Dispositif magnétique de commande pour pièce d'horlogerie - Google Patents

Dispositif magnétique de commande pour pièce d'horlogerie Download PDF

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Publication number
EP1930794B1
EP1930794B1 EP06123744A EP06123744A EP1930794B1 EP 1930794 B1 EP1930794 B1 EP 1930794B1 EP 06123744 A EP06123744 A EP 06123744A EP 06123744 A EP06123744 A EP 06123744A EP 1930794 B1 EP1930794 B1 EP 1930794B1
Authority
EP
European Patent Office
Prior art keywords
magnet
magnetic
stem
order
sealed tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP06123744A
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German (de)
English (en)
French (fr)
Other versions
EP1930794A1 (fr
Inventor
Jean-Jacques Born
François Gueissaz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Swatch Group Research and Development SA
Original Assignee
Swatch Group Research and Development SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Swatch Group Research and Development SA filed Critical Swatch Group Research and Development SA
Priority to EP06123744A priority Critical patent/EP1930794B1/fr
Priority to AT06123744T priority patent/ATE496319T1/de
Priority to DE602006019749T priority patent/DE602006019749D1/de
Priority to SG200717413-9A priority patent/SG143141A1/en
Priority to JP2007287075A priority patent/JP2008122377A/ja
Priority to US11/937,660 priority patent/US7404667B2/en
Priority to KR1020070114013A priority patent/KR101391517B1/ko
Priority to CN200710159620XA priority patent/CN101201587B/zh
Publication of EP1930794A1 publication Critical patent/EP1930794A1/fr
Priority to HK08113326.0A priority patent/HK1122366A1/xx
Application granted granted Critical
Publication of EP1930794B1 publication Critical patent/EP1930794B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C23/00—Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals
    • G04C23/02—Constructional details
    • G04C23/06—Driving or regulating means
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/001—Electromechanical switches for setting or display
    • G04C3/004—Magnetically controlled
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H25/00—Switches with compound movement of handle or other operating part
    • H01H25/06—Operating part movable both angularly and rectilinearly, the rectilinear movement being along the axis of angular movement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/0006—Permanent magnet actuating reed switches
    • H01H36/006—Permanent magnet actuating reed switches comprising a plurality of reed switches, e.g. selectors or joystick-operated

Definitions

  • the present invention relates to a magnetic device for controlling a timepiece and more particularly to a magnetic device comprising a manually operable control member that can selectively occupy several positions and move from one to the other by a translational movement. .
  • This device of the prior art has certain defects. Firstly, it is not very discreet since the guide rail extends almost the entire length of one side of the watch. In addition, it does not seem that it is possible to greatly reduce the size of this device of the prior art. Indeed, the configuration described requires to have all Reed contactors side by side on a line. However, the width of the smallest known Reed contactors is close to one millimeter. In addition, the magnetic field must be intense enough to act through the thickness of the middle part of the watch. Under these conditions, it is necessary to space the contactors sufficiently to prevent two contactors from being closed at the same time.
  • An object of the present invention is therefore to provide a control device operating without mechanical or electrical connection between the outside and the inside of the timepiece and which is more compact than those of the prior art.
  • Another object of the present invention is to provide a control device in which the amplitude of the movement of the translation to be operated by the control member is greatly reduced.
  • Another object is to provide a magnetic control device that can have the outward appearance of a conventional mechanical control device.
  • Yet another object of the present invention is to provide a magnetic control device whose control member can be easily adapted to be operated also in rotation, in the manner of a conventional control rod.
  • the present invention achieves these objects by providing a magnetic control device according to claim 1.
  • the waterproof tube is immune to possible shocks.
  • the wall of the tube does not need to be as thick as the outer wall of the timepiece.
  • Another advantage of the present invention is that the rod and the first magnet are inserted into the sealed tube. In these conditions, only the end of the stem that emerges from the timepiece is visible. Thus, the magnet and the rest of the control device are not visible. It is therefore possible to provide a control device that has the appearance of a traditional control rod.
  • Another advantage of the present invention is that only two magnetic sensors are required to enable the electronic means to distinguish three positions of the first magnet (and even four positions according to a variant). Thanks to this characteristic, the control device according to the invention can be more compact. On the other hand, the fact of limiting the number of magnetic sensors makes it possible to reduce the cost price.
  • the positions of the first and second reed switches are angularly offset relative to the axis of the sealed tube.
  • the contactors are not arranged in the extension of one another, it is possible to freely choose their spacing in the direction of the longitudinal axis of the rod, without having to worry about possible interference between contactors. According to this variant, it is therefore possible to produce a control device in which the amplitude of the translational movement that the control member must operate is reduced to a minimum.
  • the Figure 1A represents a particular embodiment of the control device according to the present invention.
  • the magnetic control device 1 is mounted in the middle part 2 of a watch.
  • a tube reference 3
  • the tube 3 is made of a magnetic material, such as stainless steel for example. It is a sealed tube open at one of its ends.
  • the tube 3 is substantially completely contained in the middle part. Only the open end of the tube opens on the outside of the watch.
  • the wall of the tube has a greater thickness.
  • This portion 7 is shaped to fit into the opening 4 of the middle part, so as to form a junction as tight as possible.
  • the seal is reinforced by an o-ring type seal (referenced 5) which is disposed in an annular groove 6 also arranged in part 7.
  • Part 7 still has a circular outer shoulder 9 provided to bear on a complementary shoulder 10 of the opening 4.
  • a room 14 arranged in the proximal end of the tube. This recess is provided to receive a coil spring 15.
  • the tube 3 extends radially from the edge of the middle part 2 towards the center of the watch. It will therefore be understood that the presence of the tube could be an obstacle to introduce certain components into the watch case during assembly of the watch. In particular, if it is an analog watch, the tube 3 could be an obstacle when introducing the movement into the box. To avoid this kind of problem, it is possible to plan to install the tube only after the installation of the other elements to take place in the watch case. Once the tube is inserted, it can stay in place once and for all. The seal between the tube 3 and the middle part 2 is therefore a gasket. Under these conditions, the sealing means which have just been described make it possible to ensure long-term sealing.
  • the manual control device of the device according to the invention is constituted by a cylindrical rod 12 inserted into the tube 3.
  • the rod 12 is provided to both slide and turn inside the tube 3.
  • One end of the rod 12 emerges from the tube through the opening 4 and, as can be seen in the figure, this end ends with a button 13 in the form of a crown.
  • the button (or crown) 13 has on its underside an annular recess in which are housed the cylindrical proximal end of the tube 3 and the coil spring 15. It is seen that the crown 13 covers the proximal end and the spring 15, in the manner of a cap.
  • the cylindrical outer face of the proximal end of the tube is designed to slide inside the annular recess of the ring, so as to vary the degree of interlocking of the tube 3 and the ring 13.
  • the ring being secured to the rod 12, this axial movement of the ring relative to the tube 3 causes the rod 12 to move in the tube.
  • the return spring 15 is a helical spring which is supported by a first of its ends against the bottom of the annular recess of the ring 13, and by its other end against the bottom of the recess 14. Under these conditions, when the carrier of the watch presses on the ring 13, it compresses the return spring 15 and sinks the proximal end of the tube 3 in the annular recess. Then, when the wearer of the watch releases its pressure on the ring 13, the return spring 15 tends to return the ring 13 and the rod 12 in their initial position.
  • the rod 12 has a profiled section of diameter substantially less than that of the rest of the rod.
  • This profiled section located at the level of the proximal portion 7 of the tube, is essentially formed of two grooves (referenced 16 and 17) and an inclined portion 18.
  • the two grooves 16, 17 and the inclined portion 18 are provided to cooperate with a circlip 19 of so as to form indexing means for maintaining or returning the rod in a selected axial position.
  • the tube 3 has a double milling symmetrical 20 which is provided to let the two branches of the circlip 19 is to maintain the latter in place.
  • the rod 12 extends between the two branches of the circlip.
  • a first magnet (referenced 21) integral with the rod 12 can move in translation inside the sealed tube 3.
  • This magnet 21 is provided to cooperate, through the wall of the tube, with a first and a second magnetic sensor placed inside the timepiece.
  • These magnetic sensors which are here Reed micro-contactors, are hereinafter abbreviated MR and referenced respectively 22 and 23.
  • MR and referenced respectively 22 and 23 are hereinafter abbreviated MR and referenced respectively 22 and 23.
  • these two MRs are arranged staggered along the sealed tube 3, so that they are at unequal distances from the distal end of the tube.
  • the first magnet 21 is driven coaxially in a bore formed in the end of the rod by which it is inserted into the tube 3.
  • a support plate 25 which carry the first and the second MR 22 and 23.
  • this support plate 25 may advantageously be constituted by the printed circuit board 25 of the electronic circuit of the watch.
  • a Reed micro-contactor is a sensitive contact to the magnetic field.
  • MR can be in two states. Indeed, it closes in the presence of a field whose component in the direction of the MR axis is sufficiently intense. In the opposite case, when the value of the field component in the direction of the MR axis does not exceed a certain threshold, the contact remains open.
  • An MR is therefore suitable for use as a two-state magnetic sensor for detecting the presence of a magnetic field whose intensity in a given direction exceeds a certain value.
  • the MR 22 and 23 are oriented with their axis parallel to the axis of the sealed tube 3 and therefore also oriented parallel to the north-south axis of the first magnet 21.
  • An advantage related to the parallel orientation of MR 22 and 23 and magnet 21 will now be explained with reference to the Figure 2B .
  • This figure is a graph showing the variation of the intensity of the flux of the magnetic field inside the blades of a Reed micro-contactor as a function of the longitudinal position occupied by the magnet. As we can see, the graph actually has two curves. The first curve, in solid line, corresponds to the values calculated for the case where the MR is closed (the two blades of the MR being in contact).
  • the second curve corresponds to the case where the MR is open. In particular, it can be verified that the flux intensity is always greater when the MR is closed.
  • the magnetic flux reaches its maximum in the center of the graph at the point of zero abscissa. This abscissa point zero corresponds to the situation where the magnet and the MR are side by side. It can be seen that, in this central region of the graph, the intensity of the magnetic flux is represented as being negative. This characteristic corresponds to the fact that when the magnet and the MR are side by side, the magnetization of the blades of the MR is in opposition to the polarization of the magnet.
  • the two horizontal lines arranged at equal distances above and below the ordinate zero on the Figure 2B indicate the MR sensitivity threshold. It can be seen that, in the present example, the force of the magnet has been chosen, at the same time, large enough so that the intensity of the flux largely exceeds the closure threshold in the center of the graph, and small enough so that the intensity of flux remains below this threshold everywhere else. It can be seen that, in absolute value, the intensity of the magnetic flux decreases rapidly as the magnet shifts relative to the MR. At the point where the intensity of the magnetic flux quickly reaches the zero value on either side of the zero abscissa, before growing again to reach two local maximums of less amplitude.
  • the two MR 22 and 23 are therefore arranged at locations where the orientation of the field lines is substantially perpendicular to the axis of the magnet 21.
  • a closer examination of the distribution of the field lines makes it possible to realize that the longitudinal spacing between the two MRs corresponds to the width of one of the loops drawn by these lines of fields.
  • the further the axes of the MRs are away from the axis of the magnet the more the MRs must be spaced longitudinally.
  • the position of the magnet 21 shown in solid lines on the figure 3A corresponds to the rest position (0) of the rod.
  • the positions of the magnet corresponding to the drawn position (1) and to the pushed position (-1) are represented by two rectangles in broken lines.
  • the figure shows that when the rod 12 is in the pulled position, the magnet is in the immediate vicinity of the first MR 22. In this position, the magnetic field is sufficient to close the MR 22.
  • position (-1) the magnet 21 is in close proximity to the second MR 23.
  • the MR 23 is closed, while the first MR 22 is open.
  • the magnet 21 and the MR 22 are not quite side by side. Indeed, as long as the force of the magnet is adapted to the sensitivity of the MRs, the magnetic field is sufficient to close the MR even when there is a lag between the latter and the magnet. So, according to what is represented on the figure 3A , the stroke of the rod 12 or, in other words, the distance separating the pulled position "1" from the pushed position "-1", can be considerably shorter than the spacing between the MRs 22 and 23.
  • the figure 3B represents the configuration of the magnet 21 'and the MR 22' and 23 'according to a second variant. As in the previous variant, the two MRs are arranged symmetrically on either side of the rest position "0" of the magnet. However, in the variant of figure 3B , both MR 22 'and 23' are much closer together so that in the rest position, they are both closed.
  • the position of the magnet 21 'shown in solid lines on the figure 3B corresponds to the drawn position (1) of the rod. It can be seen in the figure that the position of the MR 23 'corresponds to a location where the orientation of the field lines is substantially perpendicular to the MR axis. In the pulled position "1", the MR 23 'is open.
  • the MR 22 ' meanwhile, is closed.
  • the MR 22 ' is open and the MR 23' closed in the pushed position "-1" of the magnet 21 '.
  • the stroke of the rod is slightly longer than in the previous variant.
  • the variant of figure 3B to the advantage of allowing to have a fourth predefined position of the magnet (referenced "2" in the figure).
  • this fourth predefined position a second position drawn for example, the two MRs are open.
  • the figure 3B also allows to consider a third variant with three predefined positions. Indeed, if for one reason or another, the length of the sealed tube 3 must be limited, it may be advantageous not to use the position referenced "-1" in the figure and limit the stroke of the magnet 21 ' at the interval between the "2" and "0" positions.
  • the figure 3C represents the configuration of the magnet 21 "and the MR 22" and 23 "according to a fourth variant
  • the fourth variant is an asymmetrical variant compatible, for example, with the use of a tight tube 3 of low
  • the position of the magnet 21 "shown in solid lines on the figure 3C corresponds to the rest position "0" of the rod. It can be seen in the figure that the position of the MR 23 "corresponds to a location where the orientation of the lines field is substantially perpendicular to the MR axis. In the "0" rest position, the MR 23 "is open and the MR 22" is directly opposite the magnet. It is closed.
  • MRs described in this example must be small in size. However, there are MRs small enough to suit such applications.
  • MicroReed-14 developed by the company ASULAB SA, CH-2074 Marin, Switzerland.
  • the control device shown comprises a second magnet (referenced 26) which is opposite a third and a fourth MR (respectively referenced 27 and 28).
  • the magnet 26 is inserted into a transverse passage pierced in the rod 12.
  • the MR 27 and 28 are mounted on supports 29, 30 which are themselves fixed on the support plate 25 which already carried the first two MR 22 and 23.
  • the MR 27 and 28 have their axis oriented perpendicular to the axis of the rod 12 and that they are arranged symmetrically on either side of the projection of the axis of the rod 12 on the plate 25, in the immediate vicinity of the sealed tube 3.
  • the magnet 26 and the MR 27 and 28 are provided to detect the rotations of the rod 12.
  • the rotation of the magnet 26 causes a cyclic succession of openings and closures of each of the two MR 27 and 28.
  • the MR 27 and 28 thus switch with a frequency of two cycles per revolution, and the period separating two consecutive closures (or two openings) of the same MR corresponds to a rotation of 180 ° of the rod 12.
  • two MR 27 and 28 switch with the same frequency, and it will be understood that this frequency depends on the speed of rotation of the rod.
  • the two MR 27 and 28 form between them an angle of about 135 ° relative to the axis of rotation of the rod 12.
  • This angular offset results in a phase shift of ⁇ / 2 (or - ⁇ / 2) between the cycles of the two MRs.
  • the sign of this phase shift or in other words the order in which the MRs open and close, gives the direction of rotation of the rod 12.
  • a single Reed contactor (the MR 27 or the MR 28) is sufficient to detect the rotations of the rod 12. Indeed, as we have seen, the use of two MR offset angularly can detect the direction of rotation of the rod. However, in applications for which it is not necessary to distinguish between a direction of rotation and the other, it is sufficient that the electronic circuit of the watch has access to the switches of a single MR.
  • the MR 27 and 28 are not placed exactly opposite the magnet 26. Indeed, in the present example, the MR 27 and 28 are provided to cooperate with the magnet 26 no only when the rod 12 is in the rest position (position 0) as in the Figure 1A , but also when the rod is pulled out (position 1). This is the reason why a slight shift is planned between the RMs and the second magnet. The contactors are actually placed halfway between the position of the magnet in the pulled position of the rod, and the position of the magnet in the rest position.
  • the watch equipped with the magnetic control device of the present example notably comprises, in the usual way, electronic means (not shown) comprising a time base, and display means controlled by these electronic means.
  • the four magnetic sensors (the MR 22, 23, 27 and 28) are connected to the electronic means in a manner known to those skilled in the art.
  • the electronic means are provided for detecting the state of each of the magnetic sensors, and for processing this information as four binary signals.
  • the "yes” and “no" binary expressions have been preferred to the terms “open” and “closed” to denote in the figures the state of a magnetic sensor according to the invention.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
EP06123744A 2006-11-09 2006-11-09 Dispositif magnétique de commande pour pièce d'horlogerie Active EP1930794B1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP06123744A EP1930794B1 (fr) 2006-11-09 2006-11-09 Dispositif magnétique de commande pour pièce d'horlogerie
AT06123744T ATE496319T1 (de) 2006-11-09 2006-11-09 Magnetische vorrichtung zur betätigung einer uhr
DE602006019749T DE602006019749D1 (de) 2006-11-09 2006-11-09 Magnetische Vorrichtung zur Betätigung einer Uhr
SG200717413-9A SG143141A1 (en) 2006-11-09 2007-11-02 Magnetic control device for timepiece
JP2007287075A JP2008122377A (ja) 2006-11-09 2007-11-05 時計用磁気制御装置
US11/937,660 US7404667B2 (en) 2006-11-09 2007-11-09 Magnetic control device for timepiece
KR1020070114013A KR101391517B1 (ko) 2006-11-09 2007-11-09 시계용 자기 제어 장치
CN200710159620XA CN101201587B (zh) 2006-11-09 2007-11-09 用于时计的磁控制设备
HK08113326.0A HK1122366A1 (en) 2006-11-09 2008-12-08 Magnetic control device for timepiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06123744A EP1930794B1 (fr) 2006-11-09 2006-11-09 Dispositif magnétique de commande pour pièce d'horlogerie

Publications (2)

Publication Number Publication Date
EP1930794A1 EP1930794A1 (fr) 2008-06-11
EP1930794B1 true EP1930794B1 (fr) 2011-01-19

Family

ID=37835282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06123744A Active EP1930794B1 (fr) 2006-11-09 2006-11-09 Dispositif magnétique de commande pour pièce d'horlogerie

Country Status (9)

Country Link
US (1) US7404667B2 (xx)
EP (1) EP1930794B1 (xx)
JP (1) JP2008122377A (xx)
KR (1) KR101391517B1 (xx)
CN (1) CN101201587B (xx)
AT (1) ATE496319T1 (xx)
DE (1) DE602006019749D1 (xx)
HK (1) HK1122366A1 (xx)
SG (1) SG143141A1 (xx)

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KR101391517B1 (ko) 2014-05-07
CN101201587B (zh) 2011-04-13
US7404667B2 (en) 2008-07-29
SG143141A1 (en) 2008-06-27
HK1122366A1 (en) 2009-05-15
ATE496319T1 (de) 2011-02-15
EP1930794A1 (fr) 2008-06-11
DE602006019749D1 (de) 2011-03-03
CN101201587A (zh) 2008-06-18
US20080112275A1 (en) 2008-05-15
JP2008122377A (ja) 2008-05-29

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