EP3333646A1 - Objet portable comprenant une tige de commande rotative dont l'actionnement est détecté au moyen de deux capteurs inductifs - Google Patents

Objet portable comprenant une tige de commande rotative dont l'actionnement est détecté au moyen de deux capteurs inductifs Download PDF

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Publication number
EP3333646A1
EP3333646A1 EP16202478.0A EP16202478A EP3333646A1 EP 3333646 A1 EP3333646 A1 EP 3333646A1 EP 16202478 A EP16202478 A EP 16202478A EP 3333646 A1 EP3333646 A1 EP 3333646A1
Authority
EP
European Patent Office
Prior art keywords
control rod
inductive sensors
portable object
rotation
magnetic
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.)
Withdrawn
Application number
EP16202478.0A
Other languages
German (de)
English (en)
French (fr)
Inventor
Vittorio ZANESCO
Pascal Lagorgette
Pascal Meyer
Damien Schmutz
Raphaël Balmer
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.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
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 ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP16202478.0A priority Critical patent/EP3333646A1/fr
Priority to CN201780058922.XA priority patent/CN109791392B/zh
Priority to PCT/EP2017/075415 priority patent/WO2018103914A1/fr
Priority to KR1020197006878A priority patent/KR102255085B1/ko
Priority to EP17791587.3A priority patent/EP3475768B1/fr
Priority to US16/324,597 priority patent/US11385598B2/en
Priority to JP2019530544A priority patent/JP6792710B2/ja
Priority to CN201721670309.7U priority patent/CN207439424U/zh
Publication of EP3333646A1 publication Critical patent/EP3333646A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • G04C3/005—Multiple switches

Definitions

  • the present invention relates to a portable object of small dimensions such as a timepiece comprising a rotary control rod for controlling at least one electronic or mechanical function of the portable object. More specifically, the invention relates to such a portable object whose actuation of the rotary control rod is detected by measuring a magnetic induction by means of two inductive sensors.
  • the present invention relates to portable objects of small dimensions such as wristwatches which comprise a rotary control rod whose actuation makes it possible to control a mechanical or electronic function of the portable object in which the rotary control rod is arranged.
  • a recurring problem in the field of detecting the rotation of a control rod by measuring a magnetic induction is that of precisely knowing how much and in which direction the control rod is rotated.
  • systems have already been proposed which include a pair of magnetic sensors such as magnetoresistors or Hall effect sensors.
  • the magnetic sensors detect the magnetic induction variation generated by the rotation of the magnet secured to the control rod in two orthogonal directions of the space.
  • a disadvantage of such systems lies in the fact that, since the magnetic sensors measure the magnetic induction variations according to two orthogonal directions, it is not possible to subtract from the measurement signal produced by the magnetic sensors the effects due to the magnetic disturbances. external to the portable object in the case where these magnetic disturbances are directed along the measurement axis of only one of these two magnetic sensors. Indeed, in such a case, the other magnetic sensor does not perceive the external magnetic disturbance, so that the influence of this magnetic disturbance on the two measurement signals is not symmetrical and can not be eliminated. It is therefore necessary to provide the portable object with an electromagnetic shield, which is particularly bulky and expensive. Other solutions are known but more particularly intended for the measurement of the Earth's magnetic field.
  • the magnetic sensor or sensors have a high sensitivity because the earth magnetic field to be measured is very low, typically of the order of 20 to 60 ⁇ T.
  • these magnetic sensors can not usually measure magnetic inductions exceeding 5 mT, whereas the values used by small magnets often reach 100 mT.
  • the object of the present invention is to overcome the problems mentioned above as well as others by providing a portable object comprising a rotary rod for controlling at least one mechanical or electronic function of this portable object, the actuation of the rotating rod being reliably and reproducibly detected by means of inductive sensors.
  • the present invention relates to a portable object comprising a control rod whose actuation in rotation makes it possible to control at least one electronic or mechanical function of the portable object, a magnetic ring being rotated by the control rod rotary, the rotation of the control rod and the position thereof being detected by two inductive sensors arranged so as to be sensitive to a variation of the magnetic induction produced by the rotation of the magnetized ring that in two directions of space that are parallel to each other.
  • inductive sensor is meant a sensor that transforms a magnetic field that passes through electrical voltage through induction phenomenon defined by the Lenz-Faraday law.
  • it may be a Hall effect sensor or a magnetoresistive component type AMR (Anisostropic Magnetoresistance), GMR (Giant Magnetoresistance) or TMR (Tunneling Magnetoresistance).
  • the present invention provides a portable object in which the detection of the rotation of a control rod of at least one mechanical or electronic function of this portable object is obtained by measuring the variation of the magnetic induction. generated by the rotation of a magnet driven by the control rod at the means of two inductive sensors. These two inductive sensors are arranged so as to be sensitive to a variation of the magnetic induction only in a single direction of space. However, it is understood that the magnetic induction generated by the magnetic ring is added the magnetic induction generated by the medium in which the portable object is located. By teaching to arrange the pair of inductive sensors so that these sensors exhibit a sensitivity to magnetic induction in a single direction, the present invention makes it possible, by a suitable signal processing method, to completely eliminate the result.
  • the invention also relates to a method for detecting a position of a control rod whose rotational actuation makes it possible to control an electronic or mechanical function of a portable object equipped with the control rod, a magnetic ring being driven. in rotation by the control rod, the rotation of the control rod and the position thereof being detected by two inductive sensors arranged so as not to be sensitive to a variation of the magnetic induction produced. by the rotation of the magnetized ring in only one direction of space, the method comprising the step of calculating the arc-tangent function of the ratio between the signals produced by each of the inductive sensors to determine the direction of rotation and the position of the control rod.
  • the present invention proceeds from the general inventive idea of detecting the rotation of a control rod mounted in a portable object of small dimensions such as a timepiece reliably and reproducibly from a portable object to the other, especially in the case of mass production.
  • it is proposed to drive a rotating magnetic ring by the control rod and to detect the variation of the magnetic induction generated by the rotation of the magnetic ring by means of a pair of inductive sensors.
  • These two inductive sensors are arranged so as to be sensitive to the fluctuations of the magnetic induction only in a single direction of space.
  • the influence of the external magnetic induction on the portable object is the same on the measurement signals of the two inductive sensors, so that by a suitable signal processing method it is possible to eliminate completely from the result of the measurement the influence of the magnetic induction of the medium in which the portable object is located.
  • the invention also relates to a method for detecting the position and the direction of rotation of a rotary control rod which consists in calculating the arc-tangent function of the ratio between the signals produced by two inductive sensors arranged in such a way that sensitive to fluctuations in magnetic induction only in a single direction of space. Since the magnetic induction of the medium in which the portable object is situated exerts its influence on the sensitive elements of the two inductive sensors only in one direction of space, the calculation of the arc-tangent function of the ratio between signals produced by these two Inductive sensors can eliminate the signal component due to the influence of external magnetic induction to the portable object.
  • the direction from rear to front is a rectilinear direction which extends horizontally along the longitudinal axis of symmetry XX of the control rod from the outer actuating ring towards the inside of the portable object equipped with the control device.
  • the control rod will be pushed from the back to the front, and will be pulled from the front to the back.
  • the vertical direction z is a direction that extends perpendicularly to the plane in which the control rod extends.
  • the figure 1 is a perspective view in the dissociated state of a device for controlling at least one electronic function of a small portable object such as a wristwatch.
  • this control device comprises a lower frame 2, for example made of an injected plastic material or a non-magnetic metallic material such as brass, and serves as a cradle for a control rod 4 of preferentially elongated and substantially cylindrical shape, provided with a longitudinal axis of symmetry XX .
  • This control rod 4 is arranged to slide back and forth forwards along its longitudinal axis of symmetry XX , and / or to rotate about the same longitudinal axis of symmetry XX in a clockwise and counterclockwise direction. .
  • control rod 4 At a rear end 6 which will be located outside the portable object once it is equipped with a control device 1, the control rod 4 will receive an actuating ring 8 (see FIG. figure 20 ).
  • control rod 4 At a front end 10 which will be located inside the control device 1 once it is assembled, the control rod 4 has a section 12, for example square, and successively receives a magnetic unit 14 and a plain bearing 16.
  • the magnetic assembly 14 comprises a magnetic ring 18 and a support ring 20 on which the magnetic ring 18 is fixed typically by gluing (see FIG. figure 4 ).
  • the support ring 20 is a generally cylindrical piece. As visible on the figure 5 , the support ring 20 has, from the rear towards the front, a first section 22a of a first outer diameter D1 on which is engaged the magnetic ring 18, and a second section 22b of a second outer diameter D2 greater than the first outer diameter D1 and which delimits a shoulder 24 against which the magnetic ring 18 bears.
  • the first section 22a of the support ring 20 is pierced with a square hole 26 which is adapted in shape and size to the square section 12 of the control rod 4 and forms with this control rod 4 a pinion type system flowing.
  • the support ring 20 and the magnetic ring 18 remain motionless when the control rod 4 is slid axially.
  • the control rod 4 drives the support ring 20 and the ring magnet 18 rotating when rotating the control rod 4. It is understood from the foregoing that the magnetic ring 18, carried by the support ring 20, is not in contact with the control rod 4, this which makes it possible to protect it in the event of shocks applied to the portable object equipped with a control device 1.
  • the plain bearing 16 defines (see figure 5 ) a cylindrical housing 28 whose first inner diameter D3 is very slightly greater than the diameter of the circle in which the square section 12 of the control rod 4 fits in order to allow this control rod 4 to slide axially and / or to rotate inside this cylindrical housing 28.
  • the sliding bearing 16 thus ensures the perfect axial guidance of the control rod 4.
  • the square hole 26 formed in the first section 22a of the support ring 20 is extended towards the front of the control device 1 by an annular hole 30 whose second internal diameter D4 is adjusted to the third outer diameter D5 of the bearing 16.
  • the support ring 20 is thus threaded free to rotate on the plain bearing 16 and comes into axial abutment against this sliding bearing 16, which guarantees the perfect axial alignment of these two parts and makes it possible to correct any problems of concentricity. that a coupling of the sliding gear type can pose.
  • the sliding bearing 16 is provided on its outer surface with a circular flange 32 which protrudes into a first groove 34a and a second groove 34b respectively formed in the lower frame 2 (see FIG. figure 2 ) and in an upper frame 36 (see figure 6 ) arranged to cap the lower frame 2 and for example made of an injected plastic material or a non-magnetic material such as brass.
  • a circular flange 32 which protrudes into a first groove 34a and a second groove 34b respectively formed in the lower frame 2 (see FIG. figure 2 ) and in an upper frame 36 (see figure 6 ) arranged to cap the lower frame 2 and for example made of an injected plastic material or a non-magnetic material such as brass.
  • the magnetic assembly 14 and the plain bearing 16 described above are for illustrative purposes only.
  • the plain bearing 16 for example made of steel or brass, is provided to prevent the control rod 4, for example made of steel, from rubbing against the lower frame 2 and upper 36 and causes wear of the material plastic in which these two lower frames 2 and upper 36 are typically made.
  • the control rod 4 is directly carried by the lower frame 2.
  • the magnetic ring 18 and the support ring 20 on which the magnet ring 18 is fixed are provided for the case where the rotation of the control rod 4 is detected by a local variation of the magnetic field induced by the pivoting of the magnetic ring 18.
  • the magnetic assembly 14 for example by a sliding pinion which, according to its position, will for example control the winding of a mainspring or the setting at the time of a watch equipped with the control device 1.
  • control rod 4 provided over a portion of its length with a square section is given for illustrative purposes only. Indeed, to drive the magnetic assembly 14 in rotation, the control rod 4 may have any type of section which deviates from a circular section, for example triangular or oval.
  • the lower frame 2 and the upper frame 36 whose assembly defines the external geometry of the control device 1 are for example of generally parallelepipedal shape.
  • the lower frame 2 forms a cradle which receives the control rod 4.
  • the lower frame 2 comprises forwards a first receiving surface 38 of semicircular profile which serves as a seat for the sliding bearing 16 and in which is formed the first groove 34a which receives the circular flange 32. The immobilization of the Smooth bearing 16 both axially and rotation is thus ensured.
  • the lower frame 2 further comprises a rearwardly a second receiving surface 40 whose semicircular profile is centered on the longitudinal axis of symmetry XX of the control rod 4, but whose diameter is greater than that of this control rod 4. It is important to understand that the control rod 4 bears on the second receiving surface 40 only at the stage where the control device 1, assembled, is tested before being integrated into the portable object. At this stage of the assembly, the control rod 4 is introduced into the control device 1 for testing purposes and extends horizontally while being supported and guided axially by the sliding bearing 16 on the side of its front end 10 and by the second receiving surface 40 on the side of its rear end 6. By cons, once the control device 1 integrated in the portable object, the control rod 4 passes through a hole 42 formed in the middle 48 of the object notebook in which it is guided and supported (see figure 21 ).
  • Third and fourth clearance surfaces 44a and 46a of semicircular profile are also provided in the lower frame 2 and complementary release surfaces 44b and 46b (see figure 6 ) are provided in the upper frame 36 to receive the magnetic assembly 14 consisting of the magnetic ring 18 and its support ring 20.
  • the magnetic ring 18 and its support ring 20 are not in contact with the third and fourth clearance surfaces 44a, 46a and the complementary clearance surfaces 44b and 46b when the control device 1 is assembled and mounted in the portable object.
  • the third clearance surface 44a and its corresponding complementary clearance surface 44b are delimited by an annular collar 50 for the axial locking of the magnetic assembly 14.
  • the control rod 4 has a cylindrical section 52 whose diameter is between the diameter of the circle in which the square section 12 of the control rod 4 and the pitch diameter a rear section 54 of the same control rod 4 at the end of which is fixed the actuating ring 8.
  • This cylindrical section 52 of reduced diameter forms a groove 56 in which is placed a plate 58 for indexing the position of the control rod 4 (see Figure 7A ).
  • the position indexing plate 58 has a curved portion 60 which matches the profile of the cylindrical section 52 of reduced diameter.
  • the position indexing plate 58 may for example be obtained by stamping a thin metal sheet electrically conductive.
  • this position indexing plate 58 for example by molding a hard plastic material loaded with conductive particles.
  • the engagement of the position indexing plate 58 in the groove 56 ensures translation coupling back and forth forwards between the control rod 4 and the position indexing plate 58.
  • the position index plate 58 is free with respect to the control rod 4 in a vertical direction z perpendicular to the longitudinal axis of symmetry XX of the control rod 4.
  • the position indexing plate 58 is a substantially flat and generally U-shaped piece.
  • This position indexing plate 58 comprises two substantially rectilinear guide arms 62 which extend parallel to each other and which are connected to one another. one to the other by the curved portion 60. These two guide arms 62 are guided axially for example against two studs 64 formed in the lower frame 2 (see in particular figure 2 ). Guided by its two guide arms 62, the position index plate 58 slides along a flange 68 formed in the upper frame 36 and whose perimeter corresponds to that of the position index plate 58 (see figure 6 ).
  • the position indexing plate 58 also comprises two fingers 66a, 66b which extend vertically downwards on either side of the two guide arms 62.
  • the indexing plate of Position 58 has the particular function of guiding the translation in translation of the control rod 4 from front to back and back to front.
  • the fingers 66a, 66b they make it possible in particular to prevent the position indexing plate 58 from bending when it moves in translation.
  • Two openings 70 having an approximately rectangular contour are formed in the guide arms 62 of the position indexing plate 58 (see in particular FIG. Figure 7B ). These two openings 70 extend symmetrically on either side of the longitudinal axis of symmetry XX of the control rod 4.
  • the sides of the two openings 70 closest to the longitudinal axis of symmetry XX of the rod of control 4 have a profile 72 of substantially sinusoidal shape formed of a first and a second hollow 74a and 74b separated by a vertex 76.
  • the two openings 70 formed in the guide arms 62 are intended to receive the two ends 78 of a positioning spring 80 (see figure 8 ).
  • This positioning spring 80 is generally U-shaped with two arms 82 which extend in a plane horizontal and which are interconnected by a base 84. At their free end, the two arms 82 are extended by two rods 86 substantially straight which stand vertically.
  • the positioning spring 80 is intended to be mounted in the control device 1 from below the lower frame 2, so that the ends 78 of the rods 86 protrude into the openings 70 of the position indexing plate 58. It will be seen below that the cooperation between the position indexing plate 58 and the positioning spring 80 makes it possible to index the position of the control rod 4 between an unstable thrust position T0 and two stable positions T1 and T2.
  • the position indexing plate 58 is coupled in translation with the control rod 4, but that it is free with respect to the control rod 4 in the vertical direction z . It is therefore necessary to take measures to prevent the position indexing plate 58 from disengaging from the control rod 4 under normal conditions of use, for example under the effect of gravity.
  • a spring 88 for limiting the displacement of the position index plate 58 in the vertical direction z above and at a short distance from this position indexing plate 58.
  • the displacement limiting spring 88 is trapped between the lower frame 2 and the upper frame 36 of the control device 1, but is not, under normal conditions of use, in contact with the position indexing plate 58, which makes it possible to avoid that spurious friction forces exerted on the control rod 4 which would make its handling difficult and cause a phenomenon of wear.
  • the displacement limiting spring 88 is however sufficiently close to the position indexing plate 58 so that it can not decouple from the control rod 4 inadvertently.
  • the displacement limiting spring 88 comprises a substantially rectilinear central portion 90 from the ends of which extend two pairs of elastic arms 92 and 94. These elastic arms 92 and 94 extend on either side of the central portion 90 of the displacement limiting spring 88, moving away from the horizontal plane in which extends this central portion 90. These elastic arms 92 and 94 , being compressed when the upper frame 36 is joined to the lower frame 2, give the displacement limiting spring 88 its elasticity in the vertical direction z . Between the pairs of elastic arms 92 and 94 is also provided a pair and, preferably, two pairs of rigid tabs 96 which extend perpendicularly downwards on either side of the central portion 90 of the displacement limitation spring 88. These rigid tabs 96 which bear on the lower frame 2 when the upper frame 36 is placed on the lower frame 2, ensure compliance with a minimum spacing between the position indexing plate 58 and the limiting spring of the displacement 88 under normal operating conditions of the control device 1.
  • the displacement limiting spring 88 guarantees the dismountability of the control device 1. In fact, in the absence of the displacement limiting spring 88, the position indexing plate 58 should be secured to the control rod 4 and as a result, the control rod 4 could no longer be disassembled. However, if the control rod 4 can not be disassembled, the movement of the timepiece equipped with the control device 1 is also inchtmontable, which is not possible in particular in the case of a timepiece expensive.
  • the control rod 4 slightly raises the position index plate 58 against the elastic force of the displacement limitation spring 88. Continuing to push forward the control rod 4, arrives a when the position indexing plate 58 falls into the groove 56 under the effect of gravity. The control rod 4 and the position indexing plate 58 are then coupled in translation.
  • a disengagement plate 98 is provided to allow the disassembly of the control rod 4 (see figure 10 ).
  • This disengagement plate 98 is generally H-shaped and comprises a straight segment 100 which extends parallel to the longitudinal axis of symmetry XX of the control rod 4 and to which a first and a second transverse section 102 and 104 are attached.
  • the first transverse section 102 is further provided at its two free ends with two tabs 106 folded at a substantially right angle.
  • the disengagement plate 98 is received in a housing 108 formed in the lower frame 2 and located under the control rod 4. This housing 108 communicates with the outside of the control device 1 via a hole 110 which opens into a lower face 112 of the control device 1 (see figure 11 ).
  • the control rod 4 From its stable rest position T1, the control rod 4 can be pushed forward in an unstable position T0 or pulled in a stable position T2. These three positions T0, T1 and T2 of the control rod 4 are indexed by cooperation between the position index plate 58 and the positioning spring 80. More precisely (see figure 12A ), the stable rest position T1 in which no control can be introduced into the portable object equipped with the control device 1 corresponds to the position in which the ends 78 of the rods 86 of the positioning spring 80 protrude into the first hollow 74a of the two openings 70 formed in the guide arms 62 of the position index plate 58. From this stable rest position T1, the control rod 4 can be pushed forward in an unstable position T0 (see figure 12B ).
  • the ends 78 of the rods 86 engage on a second ramp profile 118 which extends the first ramp profile 114 with a second slope ⁇ less than the first slope ⁇ of the first ramp profile 114.
  • the effort that the user must provide to continue to advance the rod control 4 drops sharply and the user feels a click that indicates the transition of the control rod 4 between its position T1 and its position T0.
  • the rods 86 of the positioning spring 80 continue to move slightly away from their rest position and tend to want to come closer to one another again under the effect of their force.
  • First and second contact springs 120a and 120b are compressed into first and second recesses 122a and 122b in the lower frame 2.
  • These first and second contact springs 120a and 120b may be the choice of helical contact springs, leaf springs or the like.
  • the two cavities 122a, 122b extend preferentially but not necessarily horizontally. Because the two contact springs 120a, 120b are installed in the compressed state, the accuracy of their positioning is conditioned by the tolerance with which the lower frame 2 is manufactured. However, the precision with which the lower frame 2 is manufactured is is greater than the manufacturing accuracy of these first and second contact springs 120a, 120b. Therefore, the accuracy with which the position T0 of the control rod 4 is detected is high.
  • one of the ends of the first and second contact springs 120a, 120b is bent so as to form two contact tabs 124 which will come to bear on two corresponding first contact pads 126 provided on the surface of a sheet of flexible circuit board 128.
  • this position indexing plate 58 is electrically conductive, when the fingers 66a, 66b contact the first and second contact springs 120a, 120b, the electrical current passes through the position indexing plate 58 and the closing of the electrical contact between the first and second contact springs 120a, 120b is detected.
  • the first and second contact springs 120a, 120b are of the same length. However, preferably, the first cavity 122a will for example be longer than the second cavity 122b in particular to take account of tolerance problems (the difference in length between the two cavities 122a, 122b is a few tenths of a millimeter).
  • the finger 66a of the position indexing plate 58 which is in correspondence with the first contact spring 120a housed in the first cavity 122a the longest will come in contact with it and start compressing it.
  • the control rod 4 will continue to advance and the second finger 66b of the position indexing plate 58 will come into contact with the second contact spring 120b housed in the second cavity 122b the shortest.
  • the position indexing plate 58 will be in contact with the first and second contact springs 120a, 120b and the electric current will pass through the position index plate 58, allowing detecting the closing of the electrical contact between the two first contact springs 120a, 120b.
  • the fingers 66a, 66b of the position indexing plate 58 come into abutting contact with the first and second contact springs 120a, 120b. There is therefore no friction or wear when the control rod 4 is pushed forward in position T0 and closes the circuit between the first and second contact springs 120a, 120b.
  • the first contact spring 120a housed in the longest first cavity 122a is at the same time. compressed state. Therefore, when the user releases the pressure on the control rod 4, this first contact spring 120a relaxes and forces the return of the control rod 4 from its unstable thrust position T0 to its first stable position T1.
  • the first and second contact springs 120a, 120b thus simultaneously play the role of electrical contact parts and means of contact. elastic return of the control rod 4 in its first stable position T1.
  • the control rod 4 Since the first stable position T1, it is possible to pull the control rod 4 back into a second stable position T2 (see figure 12C ). During this movement, the ends 78 of the rods 86 of the positioning spring 80 will pass by deforming elastically from the first hollow 74a to the second hollow 74b crossing the vertices 76 of the two openings 70 formed in the guide arms 62 of the plate 58.
  • the control rod 4 reaches its second stable position T2
  • the two fingers 66a, 66b of the position indexing plate 58 abut against third and fourth contact springs 130a, 130b (FIG. see figure 13 ) which are housed in third and fourth cavities 132a, 132b formed in the lower frame 2.
  • third and fourth contact springs 130a and 130b can be the choice of helical contact springs, leaf springs or other.
  • the third and fourth cavities 132a, 132b preferably extend vertically for dimensions of the control device 1.
  • the fingers 66a, 66b of the position indexing plate 58 also come into abutting contact with the third and fourth contact springs 130a, 130b, so that any risk frictional wear is avoided.
  • the third and fourth contact springs 130a, 130b are capable of flexing when the fingers 66a, 66b of the position indexing plate 58 collide with them, and thus absorb a possible lack of precision in the positioning of the position indexing plate 58.
  • the third and fourth contact springs 130a, 130b are arranged to work in flexion (see FIG. Figures 14A and 14B ).
  • the fingers 66a, 66b of the position indexing plate 58 come into contact with the contact springs 130a, 130b according to a large surface close to their points anchoring in the lower frame 2 and the upper frame 36.
  • the proximity of the contact surface with the anchor points of the contact springs 130a, 130b induces in these contact springs 130a, 130b shear stresses which can lead to premature wear and breakage of these.
  • the contact springs 130a, 130b are preferably substantially half-way up in diameter 134 with which the fingers 66a, 66b of the position indexing plate 58 come into contact when the control rod 4 is pulled into its stable T2 position.
  • the third and fourth contact springs 130a, 130b are guided in two holes 136 formed in the upper frame 36 and come into contact with second contact pads 138 provided on the surface of the flexible printed circuit sheet 128 It is understood that, when the control rod 4 is pulled back to its stable position T2, the fingers 66a, 66b of the position index plate 58 come into contact with a reduced surface with the third and fourth springs. 130a and 130b at their largest diameter 134, which allows these contact springs 130a, 130b to flex between their two anchor points in the lower frame 2 and the upper frame 36.
  • the flexible printed circuit sheet 128 is fixed on a plate 140 located on the side of a dial of the portable object. She has in particular a cut 142 adapted in shape and size to receive the upper frame 36. A portion 144 of the flexible printed circuit sheet 128 remains free (see figure 16 ). This free portion 144 of the flexible printed circuit sheet 128 carries a plurality of electronic components 146 as well as third contact pads 148 on which at least one and, in the example shown, two inductive sensors 150 are fixed.
  • Inductive sensors 150 on the third contact pads 148 allows, via the flexible printed circuit sheet 128, to connect these inductive sensors 150 including a power source and a microprocessor (not shown) housed in the portable object.
  • the power source will supply the inductive sensors 150 with the electrical energy necessary for their operation, and the microprocessor will receive and process the signals supplied by the inductive sensors 150.
  • the free portion 144 of the flexible printed circuit sheet 128 is connected to the remainder of the flexible printed circuit sheet 128 by two strips 152 which allow the free portion 144 to be folded around the assembly of the upper frame 36 and the lower frame 2 and then fold the free portion 144 against the lower face 112 of the lower frame 2, so that the inductive sensors 150 enter two housings 156 formed in the lower surface 112 of the lower frame 2.
  • the sensors inductive 150 are precisely located under the magnetic ring 18, which ensures reliable detection of the direction of rotation of the control rod 4.
  • the assembly is covered by a holding plate 158 provided with at least one elastic finger 160 (two in the example shown) which exerts on the inductive sensors 150 a pressure elastic force directed vertically upwards so as to plate these inductive sensors 150 at the bottom of their housings 156 (see Figure 17B ).
  • the elastic fingers 160 rest on the flexible printed circuit board 128 preferably at the location where the Inductive sensors 150 are fixed.
  • the holding plate 158 is fixed to the plate 140 for example by means of two screws 162.
  • the control rod 4 is carried by the lower frame 2 which serves as a cradle.
  • the two inductive sensors 150 are arranged in the two housings 156 formed in the same lower frame 2 and are pressed against the bottom of these housings 156 by one or two elastic fingers 160 (see FIG. figure 18 ). Consequently, the accuracy of the relative positioning of the inductive sensors 150 and of the magnetized ring 18 which is mounted fixed in rotation relative to the control rod 4 is determined solely by the precision with which the lower frame 2 is made. manufacturing accuracy of the lower frame 2, for example made of injected plastic, is sufficient to ensure the proper positioning of the inductive sensors 150 and the magnetic ring 18 even in the case of mass production.
  • the inductive sensors 150 are elastically forced against the bottom of the housing 156 by the (or) finger (s) elastic (s) 160, it compensates for possible play due to manufacturing tolerances.
  • manufacturing tolerances can in particular come from the welding step of the Hall effect components 150 on the flexible printed circuit sheet 128. This welding operation is carried out for example in an oven using a solder paste deposited on the contact pads 148 of the flexible printed circuit sheet 128.
  • the inductive sensor (s) 150 each comprise a sensitive element 154 which, schematically, is in the form of a parallelepipedal element sensitive to the fluctuations of the magnetic induction in a direction S perpendicular to the large face of the parallelepiped ( see figure 22 ).
  • the inductive sensors 150 are preferably oriented so that their sensitive element 154 detects a fluctuation of the magnetic induction in the vertical direction z only. In other words, the sensors inductive are totally insensitive to the horizontal components along the orthogonal x and y axes of the magnetic induction.
  • the amplitude of the rotation and the position of the control rod 4 can be determined with only average accuracy. Indeed, when the magnetic ring 18 rotates under the effect of the actuation of the control rod 4, the inductive sensor 150 produces a sinusoidal signal whose amplitude of the variation fluctuates according to the value of the angle considered. If one is for example in a zone close to the value ⁇ / 2, the sinusoidal signal varies slightly, so that the control rod 4 can be rotated by a large enough amount without the signal supplied by the sensor inductive 150 is significantly modified. The position of the control rod 4 and its displacement can therefore be determined with average accuracy.
  • the sinusoidal signal fluctuates strongly, so that the quantity with which the control rod 4 is turned and the position thereof can be determined with good precision.
  • the system described above is quite suitable.
  • the two inductive sensors 150 are arranged at equal distance from the center of rotation O of the magnetized ring 18, symmetrically with respect to a plane P passing through the center of rotation O of the magnetized ring 18.
  • the two inductive sensors 150 are arranged with respect to the control rod 4 so that, when the magnetic ring 18 rotates under the effect of the actuation of the control rod 4, the two inductive sensors 150 produce sinusoidal signals sin (x) and sin (x + ⁇ ) which are out of phase relative to each other by an angle ⁇ between 60 ° and 120 °, and preferably substantially equal to 90 °.
  • the inductive sensors 150 are preferably oriented so that their sensitive element detects the fluctuations of the magnetic induction only along the vertical axis z .
  • This component of the magnetic induction is the sum of the inductions along the z axis generated by the magnetic ring 18 and by the magnetic field outside the portable object.
  • the inductive sensors 150 being very close to each other, the influence exerted on them the external magnetic field is substantially the same for the two inductive sensors 150. Therefore, by making the relationship between the two sinusoidal signals sin (x) and sin (x + ⁇ ), we eliminate the component of the magnetic induction due to external magnetic field to the portable object.
  • the response of the system formed by the control rod 4, the magnetic ring 18 and the inductive sensors 150 is completely independent of the external magnetic field, and it is not necessary to make provisions to magnetically shield the portable object. Likewise, the response of the system is independent of the temperature since the temperature has the same effect on both inductive sensors.
  • the magnetic ring in question here is preferably a bipolar ring but it can also be a multipolar magnet ring.
  • the dimensions of the magnet ring can also be extended to match a hollow cylinder.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Electromechanical Clocks (AREA)
EP16202478.0A 2016-12-06 2016-12-06 Objet portable comprenant une tige de commande rotative dont l'actionnement est détecté au moyen de deux capteurs inductifs Withdrawn EP3333646A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP16202478.0A EP3333646A1 (fr) 2016-12-06 2016-12-06 Objet portable comprenant une tige de commande rotative dont l'actionnement est détecté au moyen de deux capteurs inductifs
CN201780058922.XA CN109791392B (zh) 2016-12-06 2017-10-05 包括借助于两个感应式传感器来检测其致动的旋转控制柄轴的便携式物体
PCT/EP2017/075415 WO2018103914A1 (fr) 2016-12-06 2017-10-05 Objet portable comprenant une tige de commande rotative dont l'actionnement est détecté au moyen de deux capteurs inductifs
KR1020197006878A KR102255085B1 (ko) 2016-12-06 2017-10-05 2 개의 유도 센서들에 의해서 작동이 감지되는 회전 제어 스템을 포함하는 휴대물
EP17791587.3A EP3475768B1 (fr) 2016-12-06 2017-10-05 Objet portable comprenant une tige de commande rotative dont l'actionnement est détecté au moyen de deux capteurs inductifs
US16/324,597 US11385598B2 (en) 2016-12-06 2017-10-05 Portable object comprising a rotating control stem whose actuation is detected by means of two inductive sensors
JP2019530544A JP6792710B2 (ja) 2016-12-06 2017-10-05 ２つの誘導性センサーによって作動を検出する回転型制御ステムを有する携行可能な物
CN201721670309.7U CN207439424U (zh) 2016-12-06 2017-12-05 便携式物体

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EP16202478.0A EP3333646A1 (fr) 2016-12-06 2016-12-06 Objet portable comprenant une tige de commande rotative dont l'actionnement est détecté au moyen de deux capteurs inductifs

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EP3333646A1 true EP3333646A1 (fr) 2018-06-13

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EP16202478.0A Withdrawn EP3333646A1 (fr) 2016-12-06 2016-12-06 Objet portable comprenant une tige de commande rotative dont l'actionnement est détecté au moyen de deux capteurs inductifs
EP17791587.3A Active EP3475768B1 (fr) 2016-12-06 2017-10-05 Objet portable comprenant une tige de commande rotative dont l'actionnement est détecté au moyen de deux capteurs inductifs

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US (1) US11385598B2 (zh)
EP (2) EP3333646A1 (zh)
JP (1) JP6792710B2 (zh)
KR (1) KR102255085B1 (zh)
CN (2) CN109791392B (zh)
WO (1) WO2018103914A1 (zh)

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EP3835887B1 (fr) 2019-12-10 2022-07-13 The Swatch Group Research and Development Ltd Montre pourvue d'un organe de commande
EP3835886B1 (fr) * 2019-12-10 2022-08-10 The Swatch Group Research and Development Ltd Montre pourvue d'un organe de commande
JP2023528432A (ja) * 2020-06-04 2023-07-04 ミルウォーキー エレクトリック ツール コーポレイション 誘導センサを用いてアンビル位置を検出するためのシステム及び方法
US11951596B2 (en) 2020-08-05 2024-04-09 Milwaukee Electric Tool Corporation Rotary impact tool
CN112644206B (zh) * 2021-01-05 2022-08-02 南通骏星信息科技有限公司 一种双置多用途智能笔

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JP6792710B2 (ja) 2020-11-25
US20190171166A1 (en) 2019-06-06
EP3475768B1 (fr) 2020-04-15
EP3475768A1 (fr) 2019-05-01
WO2018103914A1 (fr) 2018-06-14
US11385598B2 (en) 2022-07-12
KR102255085B1 (ko) 2021-05-24
JP2019525207A (ja) 2019-09-05
KR20190033619A (ko) 2019-03-29
CN109791392A (zh) 2019-05-21
CN109791392B (zh) 2021-07-30
CN207439424U (zh) 2018-06-01

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