EP4372489B1 - Dispositif de mise à zéro à ressort - Google Patents

Dispositif de mise à zéro à ressort

Info

Publication number
EP4372489B1
EP4372489B1 EP22207387.6A EP22207387A EP4372489B1 EP 4372489 B1 EP4372489 B1 EP 4372489B1 EP 22207387 A EP22207387 A EP 22207387A EP 4372489 B1 EP4372489 B1 EP 4372489B1
Authority
EP
European Patent Office
Prior art keywords
zero
setting
lever arm
control means
compression spring
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
EP22207387.6A
Other languages
German (de)
English (en)
Other versions
EP4372489A1 (fr
Inventor
Christoph Damasko
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.)
DAMASKO PRAEZISIONSTECHNIK GMBH & CO. KG
Original Assignee
Damasko Praezisionstechnik & Co Kg GmbH
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 Damasko Praezisionstechnik & Co Kg GmbH filed Critical Damasko Praezisionstechnik & Co Kg GmbH
Priority to EP22207387.6A priority Critical patent/EP4372489B1/fr
Priority to US18/508,425 priority patent/US20240319676A1/en
Publication of EP4372489A1 publication Critical patent/EP4372489A1/fr
Application granted granted Critical
Publication of EP4372489B1 publication Critical patent/EP4372489B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0804—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0804—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms
    • G04F7/0814—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms with double hammer, i.e. one hammer acts on two counters
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/06—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator running only during the time interval to be measured, e.g. stop-watch
    • G04F7/062—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator running only during the time interval to be measured, e.g. stop-watch with reset mechanisms

Definitions

  • the invention relates to a zero-setting device for a chronograph movement, comprising at least one zero-setting heart, a zero-setting unit, and a control means.
  • the zero-setting unit has a zero-setting lever arm and a zero-setting lever latch. A first end of the zero-setting lever latch is designed to engage the at least one zero-setting heart.
  • the control means interacts with the zero-setting lever arm, whereby a zero setting of the zero-setting unit is effected by actuation of the control means.
  • the invention also relates to a chronograph with such a zero-setting device, the central second counter hand and the central minute counter hand of which are each rotatably mounted about the main axis of the chronograph movement.
  • a chronograph is typically understood to be an analog, mechanical watch or wristwatch with a stopwatch function.
  • the movement includes additional counter hands, such as a second and a minute hand, which can be rotated independently of the hands used to display the time.
  • Timing is started and stopped using a start/stop pushbutton.
  • a reset pushbutton resets the second and minute hands to their initial zero position, in which the hands point to the zero digit on the dial, to allow a new timing operation. Resetting the second and minute hands to the zero position is achieved using a zero-setting device, which is another component of the chronograph movement.
  • the zero-setting device comprises two, usually heart-shaped cams, also called zero-setting hearts, which are connected to the chronographic counters, e.g., a second and minute hand, in a torque-transmitting manner.
  • a bar also called a zero-setting lever bar, has a hammer at each end. When a hammer strikes the associated cam, the cam is forced into a position where the cam's stop surface rests against the hammer's complementary stop surface. The cam's stop surface and the pointer position are aligned in such a way that the pointer is then in the zero position. This position, in which the bolt or its ends or hammers rest against the heart-shaped cams to cause them to rotate and thus reset the pointers to the zero position, is called the zero position.
  • the bolt which houses the two hammers, is movably connected to a zero-setting lever, also called a zero-setting lever arm.
  • a zero-setting lever also called a zero-setting lever arm.
  • the bolt and the zero-setting lever are held in a free position in which the two hammers cannot come into contact with the heart-shaped cams.
  • the bolt and the zero-setting lever can be moved to reset them.
  • the hammers act on the heart-shaped cams, thereby resetting the hands to the zero position.
  • an intermediate control device also implemented as a lever here, the force applied by the user to the pusher is transmitted to the zero-setting device.
  • the user must overcome the opposing return spring force.
  • the disadvantage of this arrangement is that the force or impulse exerted by the user against the return spring force is often insufficient to ensure reliable rotation of the cams and thus reset the hands. Often, the user may need to press the pusher several times to reset the hands to the zero position.
  • the patent specification US 9,164,492 B2 discloses a zero-setting device for a chronograph.
  • the zero-setting device shown here comprises a total of three zero-setting cams, which correspond to respective zero-setting bars or zero-setting hammers.
  • Each hammer has a stop surface at a first end that complements the shape of the associated zero-setting cam.
  • the individual hammers are kinetically connected to one another. connected, but independently rotatable about their respective axes.
  • a return spring and a return latch are used to initially hold the hammers in a rest position, in which there is no engagement with the associated zero-setting cams.
  • Each hammer is also assigned a hammer spring, the attachment end of which is firmly connected to the other end of the hammer. The other, free end of the hammer springs rests on the respective pins of a winding and release device.
  • a control device By pressing the reset button, a control device deflects the winding and release mechanism in such a way that the hammer springs supported on it are tensioned or "wound up,” resulting in a respective preload of the individual hammers.
  • the preload is intended to increase the impulse to the zero-setting cams and thus achieve the zero setting more reliably.
  • the zero-setting device shown is complex and comprises a multitude of individual components, which not only significantly increases costs but also maintenance effort and the need for repairs.
  • Each of the zero-setting cams is coupled to a separate zero-setting hammer, which is why the resetting of the individual hands to the zero position often occurs with a time delay.
  • the user To reset the scale, the user must overcome not only the force of the return spring but also the opposing force of each individual hammer spring. This requires a comparatively high amount of force and consequently reduces operating comfort.
  • a zero-setting device for a chronograph can be taken, which has as its essential components a second zero-setting heart, a minute zero-setting heart, and a zero-setting unit with a zero-setting lever arm and a zero-setting lever latch.
  • the zero-setting lever latch is designed with its first end, or "hammer,” to abut against the second zero-setting heart and its second end, or “hammer,” to abut against the minute zero-setting heart, so that As described above, these can be rotated, when the respective ends are brought together, into a position in which the connected hands are held in their zero position.
  • the chronograph disclosed here is equipped with a central seconds counter hand and a central minutes counter hand, which, like the hands intended for displaying the time, rotate around the central main axis of the movement.
  • a control cam holds the zero-setting unit in the free position in which the two ends of the zero-setting lever latch are not in contact with the seconds or minute zero-setting heart.
  • the control cam can be rotated, releasing the zero-setting lever arm and moving the zero-setting lever latch in the direction of the zero-setting hearts via a compression spring applied to the zero-setting lever arm, indirectly by pivoting the zero-setting lever arm.
  • a rod connected to the control cam in the form of a second zero-setting unit, acts directly on the zero-setting lever arm, so that the rotation of the control cam simultaneously pivots the zero-setting lever arm.
  • the linkage is fixedly mounted in the chronograph movement and converts the rotary motion of the control cam into a directed pressure movement on the seconds or minute zero-setting heart.
  • the linkage comprises several individual components, each of which is mounted so that it can move relative to one another. The disadvantages are the increased maintenance effort and increased manufacturing costs caused by the additional components of the linkage.
  • the object is achieved by a zero-setting device according to claim 1 and a chronograph with a zero-setting device according to claim 16.
  • a zero-setting device according to the invention of the type described in more detail at the outset is characterized in that the zero-setting device comprises a first compression spring supported on the zero-setting lever arm and operatively connected to the control means, wherein the control means interacts indirectly with the zero-setting unit via the first compression spring.
  • the zero-setting unit By actuating the control means, the zero-setting unit can be moved from a free position, in which the first end of the zero-setting lever latch cannot come into contact with the at least one zero-setting heart, to a zero position in which the first end of the zero-setting lever latch rests against the at least one zero-setting heart.
  • the control means does not act directly on the zero-setting lever arm, but indirectly via the first compression spring.
  • a significant advantage here is that the first compression spring fulfills two functions simultaneously.
  • the compression spring is provided for spring loading the zero-setting lever arm through elastic deformation and, on the other hand, for transmitting the movement of the control means to the zero-setting lever arm.
  • the zero-setting lever arm and the first compression spring are aligned with one another such that the first compression spring is supported on the zero-setting lever arm.
  • the first compression spring serves to transmit force from the control means to the zero-setting lever arm, in order to support the movement of the zero-setting unit from the release position to the zero position.
  • a further advantage is that even after the zero-setting unit has been zeroed, has been effected, the spring force of the first compression spring can continue to bear on the zero-setting lever arm, whereby the zero-setting unit is permanently forced into the zero position or held there. In this way, the rotation of the at least one zero-setting heart required to zero the counter hands of the chronograph can be achieved more reliably and by only pressing the reset pusher once.
  • the total number of components of the zero-setting device in particular the number of moving components or components that move relative to one another, can be reduced, thereby drastically reducing manufacturing costs and maintenance requirements.
  • the zero-setting lever arm can also be preloaded by the first compression spring in the released position, i.e., before the control means is actuated to effect the zero position.
  • the zero-setting lever arm therefore has a bolt- or pin-like stop against which the first compression spring is supported.
  • the spring force acting on the zero-setting lever arm can be increased or decreased as needed, thereby, in particular, realizing the aforementioned preload.
  • the bolt- or pin-like stop is designed as an eccentric for finely adjusting the spring force exerted by the first compression spring on the zero-setting lever arm.
  • the stop can be seated eccentrically in a receptacle of the zero-setting lever arm, allowing its positioning on the zero-setting lever arm to be changed by rotating the eccentric, e.g., with a screwdriver.
  • the spring force of the first compression spring which rests on the bolt- or pin-like stop, can be adjusted with high precision for fine adjustment of the zero-setting device.
  • the first compression spring has a fastening end and a free end, wherein the fastening end is directly connected to the control means and the free end is supported on the zero-setting lever arm.
  • the first compression spring is preferably designed as a U-shaped bow spring. The fastening end connected to the control means is then arranged on one leg and the free end supported on the zero-setting lever arm is arranged on the other leg. When the control means is actuated in order to zero the zero-setting unit, the free end of the first compression spring is deflected towards the fastening end, i.e., in the elastically deformed state of the first compression spring, the distance between the two legs is reduced.
  • the zeroing lever arm and the first compression spring perform a mutually opposite movement upon actuation of the control means in order to effect the zeroing of the zeroing unit.
  • the first compression spring can be connected to the control means, in particular in a torque-transmitting manner
  • the zero-setting lever arm can be connected at its second end to the zero-setting lever latch and can be mounted at its first end so as to be rotatable and/or pivotable about a zero-setting lever arm pivot point, such that a rotational and/or pivotal movement of the control means about its rotational axis results in a co-directional rotational and/or pivotal movement of the compression spring and an opposite rotational and/or pivotal movement of the zero-setting lever arm.
  • the zero-setting lever latch is freely pivotably articulated to the second end of the zero-setting lever arm.
  • this is achieved by the first compression spring being supported in a region of the zero-setting lever arm between the connection to the zero-setting lever latch and the rotatable and/or pivotable bearing on the latter. Due to the rotational movement transmitted from the control means to the compression spring, the compression spring is pivoted by a small amount in a first direction of rotation, which corresponds to the clockwise direction of the chronograph. The free end of the first compression spring acts on the zero-setting lever arm, causing it to rotate around the zero-setting lever arm pivot point, and in a second direction of rotation, opposite to the first direction of rotation and counterclockwise.
  • the first end of the zero-setting lever arm which is connected to the zero-setting lever latch, is pivoted in the direction of the at least one zero-setting heart, whereby the zero-setting lever latch comes into contact with the at least one zero-setting heart, i.e., the zero-setting unit is reset.
  • the zero setting can be released and the zero-setting unit can be returned to the free position, thus enabling a new time measurement.
  • the control mechanism itself can be activated via a reset pusher that protrudes from the chronograph case for user operation.
  • a reset pusher that protrudes from the chronograph case for user operation.
  • the longitudinal force of the reset pusher is converted into a rotary movement of the control mechanism, pivoting the control mechanism around its rotational axis.
  • the zero setting of the zero-setting unit is supported by a second compression spring, which is fixedly mounted in the chronograph movement and whose free end also rests on the zero-setting lever arm, exerting a spring force that resets the zero-setting unit.
  • the second compression spring is in a deflected position when the zero-setting unit is in the free position, so that the second compression spring exerts a permanent pressure or spring force on the zero-setting lever arm, forcing the zero-setting unit into the zero position.
  • the first compression spring and the second compression spring redundantly reset the zero setting of the zero setting unit upon actuation of the control means.
  • the first compression spring is elastically deformed, in particular deflected or tensioned, by the movement of the control means, and the second compression spring is released from a deflected position towards its rest position.
  • both the first and the second compression springs are supported on the zero setting lever arm, the zero setting lever arm being double-spring loaded. Due to the double spring loading of the zero setting unit, its zero setting can be reset with a single Pressing the reset pusher can hold the chronograph hands securely and permanently, resetting them to a clear zero position. Pressing the start/stop pusher releases the zero setting and returns the zero-setting unit to its free position.
  • the first compression spring and the second compression spring are offset from each other with respect to the Z-coordinate direction of the chronograph movement.
  • the first compression spring is offset from the zero-setting lever arm with respect to the Z-coordinate direction
  • the second compression spring is arranged in a common plane with the zero-setting lever arm with respect to the Z-coordinate direction. Structurally, this can be implemented, for example, by having the first compression spring rest on a bolt- or pin-like stop on the zero-setting lever arm, and the second compression spring rest on its outer contour on the front side.
  • the control means in particular to hold the zero-setting unit in the released position against the spring force of the second compression spring, is in locking engagement with the first end of the zero-setting lever arm.
  • the engagement can be released by actuating the control means to bring about the zero-setting unit's zero position.
  • this can be structurally implemented by the second end of the zero-setting lever arm having a receptacle and the control means having a complementary contour for engaging the receptacle of the zero-setting lever arm.
  • the control means Upon actuation of the control means, it is moved, in particular rotated, whereby the engagement is released and the locking of the zero-setting lever arm is released.
  • the zero-setting device can comprise a third spring, in particular a detent spring, which is fixedly mounted in the movement of the chronograph and whose free end cooperates with the control means.
  • the free end of the third spring upon actuation of the control means, engages the control means in the position causing the zero setting.
  • the third spring is in particular designed as a detent spring and has, at its free end, a nose, for example, in a V shape, which cooperates with a complementary contour of the control means or in This engages and thus prevents movement, especially rotation, of the control mechanism.
  • the third spring thus further secures the zero position of the zero-setting unit. By pressing the start/stop button, the zero position can be released and the zero-setting unit can be returned to the free position, thus enabling a new timing operation.
  • the third spring can expediently be arranged offset from the zero-setting lever arm and offset from the first compression spring with respect to the Z coordinate direction of the chronograph movement.
  • the first compression spring is arranged in a first, lower plane with respect to the Z coordinate direction, the zero-setting lever arm, the second compression spring and the control means in a second, common plane, and the third spring in a third, upper plane.
  • the first and second compression springs are each operatively connected to the zero-setting lever arm via their respective free ends or are supported on it, the free end of the third spring interacts with the control means.
  • the other end, the fastening end, of the second compression spring and the third spring is each fixedly mounted in the chronograph movement; the fastening end of the first compression spring is connected to the control means in particular fixedly or in a torque-transmitting manner.
  • Actuation of the control means thus causes a movement, in particular rotation, of the first compression spring, which can be transmitted via its free end to the zero-setting lever arm.
  • this also causes the zero-setting lever arm to be released from the locked position and the third spring to engage to lock the zero position.
  • a chronograph according to the invention comprises a central second counter hand and a central minute counter hand, each of which is rotatably mounted around the main axis of the movement for timekeeping.
  • the central second counter hand is provided with a second wheel and the The center minute counter hand is connected to a minute wheel.
  • the chronograph is characterized in that the zero-setting lever latch of the zero-setting device has a first end for engagement with a first zero-setting heart, namely a second zero-setting heart, and a second end for engagement with a second zero-setting heart, namely a minute zero-setting heart.
  • the zero-setting unit can be brought about by actuating the control means, wherein the control means interacts with the zero-setting unit via the first compression spring supported on the zero-setting lever arm.
  • the second zero-setting heart interacts directly with the second wheel to transmit torque
  • the minute zero-setting heart interacts indirectly with the minute wheel to transmit torque, in order to reset the center second counter hand and the center minute counter hand to their zero position.
  • Figure 1 shows a perspective view of an exemplary embodiment of a zero-setting device 100 according to the invention from an angle from behind, i.e., from the viewpoint of the back of the chronograph, as well as some other components of the movement 300 that interact with the zero-setting device 100.
  • the movement 300 is driven by a pivot drive (not shown here), which engages the gear train of the watch with the seconds wheel 310.
  • the seconds wheel 310 is fixedly connected to the center seconds counter hand (not shown here) via a shaft.
  • the center seconds and center minutes counter hands are each rotatably mounted about the main axis of the movement 300 of the chronograph.
  • a driver spring 311 is fixedly connected to the seconds wheel 310 and is designed to engage the pulse receiving wheel 330.
  • the pulse receiving wheel 330 is connected to the drive wheel (hidden in the figure) and the pulse transmission wheel 340 via a multi-function shaft.
  • the drive wheel is in constant mesh with the zero-setting wheel 350
  • the impulse transmission wheel 340 is in constant mesh with the minute wheel 320.
  • the latter is connected to the center minute counter hand (not shown here) in a torque-transmitting manner.
  • the impulse receiving wheel 330 is rotated a further fractional unit by the driver spring 311.
  • the rotary motion is transmitted via the multifunction shaft to the drive wheel and the impulse transmission wheel 340, thereby further moving the zero-setting wheel 350 and the minute wheel 320, and finally advancing the center minute counter hand by one unit.
  • a minute counter detent 321 engages the minute wheel 320 to count the minutes elapsed during the timekeeping operation.
  • the zero-setting device 100 comprises, for example, a first zero-setting heart 110, a second zero-setting heart, and a second zero-setting heart 120, a minute zero-setting heart.
  • the second zero-setting heart 110 is fixedly connected to the second wheel 310
  • the minute zero-setting heart 120 is fixedly connected to connected to the zero-setting wheel 350.
  • the zero-setting unit 200 By actuating the zero-setting unit 200, the second zero-setting heart 110 and the minute zero-setting heart 120 can be rotated to the zero position shown here, which corresponds to the respective zero position of the center second and center minute counter hands.
  • the second zero-setting heart 110 interacts directly with the second wheel 310 to transmit torque
  • the minute zero-setting heart 120 interacts indirectly with the minute wheel 320 to transmit torque via the multifunction shaft, the drive wheel, and the impulse transmission wheel 340.
  • the minute zero-setting heart 120 could also be connected directly to the minute wheel 320.
  • the zero-setting unit 200 is shown here in the zero position, in which the first end 221 of the zero-setting lever latch 220 rests on the second zero-setting heart 110 and the second end 222 rests on the minute zero-setting heart 120.
  • the zero setting device 100 is made of Figure 1 in the same perspective view, but shown in isolation.
  • the zero-setting device 100 comprises the first or second zero-setting heart 110 and the second or minute zero-setting heart 120, a zero-setting unit 200 having the zero-setting lever latch 220 and the zero-setting lever arm 210, a control means 130, and a first compression spring 140.
  • the control means 130 is implemented here, for example, as a control cam and is mounted in the chronograph movement 300 so as to be pivotable and/or rotatable about its control means rotation axis SA.
  • the first compression spring 140 can be designed as a U-shaped bow spring, wherein a fastening end 141 connected to the control means 130 in a rotationally transmitting manner is arranged on one of the legs.
  • the other leg is designed as a free end 142 and is supported on the zero-setting lever arm 210, in particular on a bolt- or pin-like stop 213 of the zero-setting lever arm 210.
  • the leg having the free end 142 and the zero-setting lever arm 210 run approximately parallel to each other in the released position of the zero-setting unit 200.
  • the zero-setting lever arm 210 is rotatably mounted at its first end 211 about the zero-setting lever arm pivot point 214.
  • the second end 212 of the The zero-setting lever arm 210 is freely pivotably connected to the zero-setting lever latch 220.
  • the bolt- or pin-like stop 213 is arranged in a region between the first end 211 and the second end 212 of the zero-setting lever arm 210, i.e., between the zero-setting lever arm pivot point 214 and the connection to the zero-setting lever latch 220.
  • the control means 130 is pivoted about the control means axis SA in a clockwise direction of the chronograph movement 300.
  • the first compression spring 140 which is fixedly or torque-transmittingly connected to the control means 130, follows the rotational movement and also pivots clockwise of the movement 300. Because the compression spring 140 is supported with its free end 142 on the bolt- or pin-like stop 213 of the zero-setting lever arm 210, the latter is pivoted in a movement opposite to the first compression spring 140 about its zero-setting lever arm pivot point 214, specifically in a counterclockwise direction of rotation of the chronograph movement 300.
  • the zero-setting lever latch 220 Due to the pivoting movement of the zero-setting lever arm 210, the zero-setting lever latch 220, which is hinged at its second end 212, is moved in the direction of the zero-setting hearts 110, 120, so that finally the first end 221 of the zero-setting lever latch 220 comes into contact with the second zero-setting heart 110 and the second end 222 comes into contact with the minute zero-setting heart 120.
  • the zero-setting unit 200 is then in the zero position (see Figure 1 ). Even after reaching the zero position, the spring force of the first compression spring 140 continues to bear on the zero-setting lever arm 210, thereby increasing the pressure exerted by the zero-setting lever latch 220 on the zero-setting hearts 110, 120 and forcing the zero-setting unit 200 permanently into the zero position or holding it there.
  • the force acting on the zero-setting lever arm 210 or its impulse to rotate about the zero-setting lever arm pivot point 214 can be further increased by a second compression spring 150, the function of which can be determined by the Figure 3 will be explained in more detail.
  • the Figure 3 shows a plan view from behind, ie from the viewpoint of the back of the chronograph, of the zero-setting device 100 from the Figures 1 and 2
  • the zero-setting unit 200 is in the zero position, in which the two ends 221, 222 of the zero-setting lever latch 220 rest against the second or minute zero-setting heart 110, 120.
  • the second compression spring 150 rests with its free end 152 on the zero-setting lever arm 210.
  • the force application point at which the spring force applied by the second compression spring 150 acts on the zero-setting lever arm 210, is selected such that the pivoting movement of the zero-setting lever arm 210 is deviated from the free position, in which the second compression spring 150 is deflected against the spring force acting on the zero-setting lever arm 210 (see Figure 2 ) to support the zero-setting lever arm pivot point 214 into the zero position shown here.
  • the second compression spring 150 is fixedly mounted in the movement 300 via at least one mounting means (not shown).
  • the spring force of the second compression spring 150 acts permanently on the first end 211 of the zero-setting lever arm 210.
  • the first end 211 of the zero-setting lever arm 210 is also operatively connected to the control means 130.
  • the first end 211 of the zero-setting lever arm 210 can have a U-shaped receptacle 215.
  • the control means 130 has a correspondingly complementary contour and is arranged with respect to the receptacle 215 such that, when the zero-setting unit 200 is in the released position, its contour is in locking engagement with the first end 211 of the zero-setting lever arm 210 (see Figure 2 ).
  • Control means 130 By pressing the Control means 130 is pivoted around the control center axis SA in the clockwise direction of the clockwork 300, whereby the locking engagement is released and the contour of the control means 130 lies contact-free in the receptacle 215, as the Figure 3
  • the zero-setting lever arm 210 is released and is simultaneously pivoted by the first compression spring 140 and the second compression spring 150 to the zero position of the zero-setting unit 200.
  • both compression springs 140, 150 the zero-setting unit 200 is moved into the zero position under double spring load and is securely held there by the continuing spring forces.
  • a reset pusher 360 which protrudes from the chronograph case and can be actuated, or “pressed,” by a user to exert a longitudinally directed force or movement.
  • a transmission mechanism 370 converts the axial or longitudinal movement of the reset pusher 370 into the previously described rotational or pivoting movement of the control means 130.
  • the control means 130 is actuated by "pressing" the reset pusher 360 and pivots about its control means rotation axis SA in the clockwise direction of the chronograph.
  • FIGS. 4 and 5 show the zero-setting device 100 from a front view, ie from the front of the chronograph.
  • Figure 4 The zero setting unit 200 is in the release and in the Figure 5 shown in the zero position.
  • a third spring 160 namely a detent spring, which is fixedly mounted with its fastening end 161 in the movement 300 of the chronograph.
  • the free end 162 of the detent spring 160 is designed with a V-shaped nose for engagement in complementary V-shaped receptacles 132 arranged on the outer contour of a detent means 131, in particular a detent cam.
  • the detent means 131 represents a component of the control means 130 and is mounted floatingly thereon and is pivotable or rotatable about the control means rotation axis SA.
  • the free end 162 of the detent spring 160 cooperates via the detent means 131 with the control means 130 in order to
  • the locking means 131 has, in the embodiment shown here, a total of three V-shaped receptacles 132 running along the outer contour.
  • the V-shaped nose of the detent spring 160 engages in the foremost receptacle 132 in the direction of rotation of the detent means 131.
  • the control means 130 When the control means 130 is actuated, the detent means 131 also rotates clockwise of the chronograph about the control center axis SA.
  • the detent spring 160 attempts to engage completely in the V-shaped receptacles 132 and in doing so slides along the bevel of the outer contour of the detent means 131. In the event that the detent spring 160 does not engage centrally in the V-shaped receptacles 132, the detent spring 160 will attempt to rotate the detent means 131 in one direction and thus precisely bring about the desired position of the control means 130 for the zero setting of the zero setting unit 200. In order to Figure 5 To effect the zero setting of the zero-setting unit 200 as shown, the reset pusher 360 is pressed.
  • the transmission mechanism 370 converts the linear movement of the reset pusher 360 into a pivoting movement of the locking means 131 or the control means 130 about the control means rotation axis SA in the clockwise direction of the chronograph.
  • the V-shaped nose of the locking spring 160 engages in the rearmost receptacle 132 in the direction of rotation of the locking means 131.
  • the third spring 160 thus further secures the zero-setting unit 200 in the zero position.
  • the first compression spring 140 and the second compression spring 150 are arranged offset from one another with respect to the Z-coordinate direction of the movement 300.
  • the second compression spring 150 is supported on the outer contour of the zero-setting lever arm 210 and is arranged in a common plane with the zero-setting lever arm 210 and the control means 130 with respect to the Z-coordinate direction.
  • the first compression spring 140 is supported on the bolt- or pin-like stop 213 of the zero-setting lever arm 210, which protrudes from the common plane, and is, from the front side, of the chronograph, together with the bolt- or pin-like stop 213, is arranged in a subjacent or lower plane.
  • the third spring or detent spring 160 is in turn offset from the first and second compression springs 140, 150 with respect to the Z coordinate direction and, together with the detent means 131, is located in an upper plane, which, as viewed from the front of the chronograph, lies above the common plane.
  • the bolt- or pin-like stop 213 is designed as an eccentric, with an upper cylindrical section 216 relative to the longitudinal axis and a lower cylindrical section 217 arranged eccentrically below it.
  • the upper cylindrical section 216 is provided for connection to a receptacle, in particular a bore of the zero-setting lever arm 210.
  • the lower cylindrical section 217 protrudes from the zero-setting lever arm 210 so that the first compression spring 140 can be supported thereon (see, for example, Figure 1 ).
  • the lower cylindrical section 217 has a slot or groove 218 which, with the aid of an appropriate tool, e.g., a screwdriver, allows rotation of the bolt- or pin-like stop 213 in the receptacle of the zero-setting lever arm 210 about the rotation axis RA of the upper cylindrical section 216. Due to the eccentric arrangement of the lower cylindrical section 217, it follows a circular path on the zero-setting lever arm 210, whereby the position of the stop 213 relative to the first compression spring 140 can be changed. In this way, the spring force of the first compression spring 140, which is supported on the bolt- or pin-like stop 213, can be adjusted with high precision for fine adjustment of the zero-setting device 100.
  • an appropriate tool e.g., a screwdriver

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Claims (16)

  1. Dispositif (100) de mise à zéro pour un mouvement d'horlogerie (300) d'un chronographe, comprenant
    - au moins un cœur (110, 120) de mise à zéro,
    - une unité (200) de mise à zéro qui comprend un bras (210) de levier de mise à zéro et un loquet (220) de levier de mise à zéro, dont la première extrémité (221) est conçue pour venir en appui contre l'au moins un cœur (110, 120) de mise à zéro, et
    - un moyen de commande (130) coopérant avec le bras (210) de levier de mise à zéro, une mise à zéro de l'unité (200) de mise à zéro étant provoquée par l'actionnement du moyen de commande (130),
    caractérisé en ce que
    le dispositif (100) de mise à zéro comprend un premier ressort de pression (140) s'appuyant sur le bras (210) de levier de mise à zéro et en liaison fonctionnelle avec le moyen de commande (130), et le moyen de commande (130) coopère indirectement avec l'unité (200) de mise à zéro par l'intermédiaire du premier ressort de pression (140).
  2. Dispositif (100) de mise à zéro selon la revendication 1, caractérisé en ce que
    le bras (210) de levier de mise à zéro comprend une butée (213) en forme de boulon ou de goupille sur laquelle s'appuie le premier ressort de pression (140).
  3. Dispositif (100) de mise à zéro selon la revendication 2, caractérisé en ce que
    la butée (213) en forme de boulon ou de goupille est réalisée comme un excentrique pour le réglage et l'ajustement fin d'une force de ressort exercée par le premier ressort de pression (140) sur le bras (210) de levier de mise à zéro.
  4. Dispositif (100) de mise à zéro selon l'une des revendications précédentes, caractérisé en ce que
    le premier ressort de pression (140) comprend une extrémité de fixation (141) et une extrémité libre (142), l'extrémité de fixation (141) étant reliée directement au moyen de commande (130) et l'extrémité libre (142) s'appuyant sur le bras (210) de levier de mise à zéro.
  5. Dispositif (100) de mise à zéro selon la revendication 4, caractérisé en ce que
    le premier ressort de pression (140) est réalisé sous forme de ressort à étrier en U, l'extrémité de fixation (141) reliée au moyen de commande (130) étant agencée sur une branche et l'extrémité libre (142) s'appuyant sur le bras (210) de levier de mise à zéro étant agencée sur l'autre branche.
  6. Dispositif (100) de mise à zéro selon l'une des revendications précédentes, caractérisé en ce que
    en actionnant le moyen de commande (130) pour provoquer la mise à zéro de l'unité (200) de mise à zéro, le bras (210) de levier de mise à zéro et le premier ressort de pression (140) réalisent un mouvement opposé l'un par rapport à l'autre.
  7. Dispositif (100) de mise à zéro selon l'une des revendications précédentes, caractérisé en ce que
    le premier ressort de pression (140) est relié au moyen de commande (130) de manière à transmettre le couple, et le bras (210) de levier de mise à zéro est monté, au niveau de sa première extrémité (211), de manière à pouvoir tourner et/ou pivoter autour d'un point (214) de pivotement de bras de levier de mise à zéro et est relié à sa seconde extrémité (212) au loquet (220) de levier de mise à zéro de sorte qu'un mouvement de rotation et/ou de pivotement du moyen de commande (130) autour de son axe (SA) de rotation de moyen de commande entraîne un mouvement de rotation et/ou de pivotement du premier ressort de pression (140) dans le même sens et un mouvement de rotation et/ou de pivotement du bras (210) de levier de mise à zéro dans le sens opposé.
  8. Dispositif de mise à zéro (100) selon la revendication 7, caractérisé en ce que
    le premier ressort de pression (140) est supporté dans une zone du bras (210) de levier de mise à zéro entre la liaison avec le loquet (220) de levier de mise à zéro et le palier rotatif et/ou pivotant sur le bras (210) de levier de mise à zéro.
  9. Dispositif (100) de mise à zéro selon l'une des revendications précédentes,
    le dispositif de mise à zéro (100) étant caractérisé en ce qu'il comprend un deuxième ressort de pression (150) qui est monté de manière fixe dans le mouvement d'horlogerie (300) du chronographe et dont l'extrémité libre (152) s'appuie sur le bras (210) de levier de mise à zéro exerçant une force de ressort qui ramène l'unité (200) de mise à zéro en position zéro.
  10. Dispositif (100) de mise à zéro selon la revendication 9, caractérisé en ce que
    le premier ressort de pression (140) est décalé par rapport au bras (210) de levier de mise à zéro dans la direction de coordonnée Z du mouvement d'horlogerie (300) du chronographe, et le deuxième ressort de pression (150) est agencé dans un plan commun avec le bras (210) de levier de mise à zéro par rapport à la direction de coordonnée Z.
  11. Dispositif (100) de mise à zéro selon l'une des revendications précédentes, caractérisé en ce que
    le moyen de commande (130) est en mise en prise de blocage avec la seconde extrémité (212) du bras (210) de levier de mise à zéro, laquelle mise en prise de blocage peut être libérée par actionnement du moyen de commande (130) afin de ramener l'unité (200) de mise à zéro en position zéro.
  12. Dispositif (100) de mise à zéro selon la revendication 11, caractérisé en ce que
    la seconde extrémité (212) du bras (210) de levier de mise à zéro comprend un logement (215) et le moyen de commande (130) comprend un contour complémentaire pour la mise en prise dans le logement (215) du bras (210) de levier de mise à zéro.
  13. Dispositif (100) de mise à zéro selon l'une des revendications précédentes,
    le dispositif (100) de mise à zéro étant caractérisé en ce qu'il comprend un troisième ressort (160), en particulier un ressort de détente, qui est monté de manière fixe dans le mouvement d'horlogerie (300) du chronographe et dont l'extrémité libre (162) coopère avec le moyen de commande (130).
  14. Dispositif (100) de mise à zéro selon la revendication 13, caractérisé en ce que
    l'extrémité libre (162) du troisième ressort (160) peut être amenée, par actionnement du moyen de commande (130), en mise en prise qui maintient le moyen de commande (130) dans la position zéro.
  15. Dispositif (100) de mise à zéro selon l'une des revendications 13 ou 14, caractérisé en ce que
    le troisième ressort (160) est agencé par rapport à la direction de coordonnée Z du mouvement d'horlogerie (300) du chronographe de manière décalée par rapport au bras (210) du levier de mise à zéro et décalée par rapport au premier ressort de pression (140).
  16. Chronographe avec un dispositif (100) de mise à zéro selon l'une des revendications 1 à 15, dont l'aiguille centrale des secondes et l'aiguille centrale des minutes sont montées de manière à pouvoir tourner autour de l'axe principal du mouvement d'horlogerie (300) du chronographe, l'aiguille centrale des secondes étant reliée à une roue des secondes (310) et l'aiguille centrale des minutes étant reliée à une roue des minutes (320),
    caractérisé en ce que
    le loquet (220) de levier de mise à zéro du dispositif (100) de mise à zéro comprend une première extrémité (221) destinée à venir en appui contre un premier cœur (110) de mise à zéro, un cœur de mise à zéro des secondes, et une deuxième extrémité (222) destinée à venir en appui contre un deuxième cœur (120) de mise à zéro, un cœur de mise à zéro des minutes, et une mise à zéro de l'unité (200) de mise à zéro peut être réalisée par actionnement du moyen de commande (130), le moyen de commande (130) coopérant avec l'unité (200) de mise à zéro par l'intermédiaire du premier ressort de pression (140) s'appuyant sur le bras (210) de levier de mise à zéro, et le cœur (110) de mise à zéro des secondes coopérant directement avec la roue des secondes (310) pour transmettre le couple et le cœur (120) de mise à zéro des minutes coopérant indirectement avec la roue des minutes (320) pour transmettre le couple, afin de provoquer un retour de l'aiguille centrale des secondes et de l'aiguille centrale des minutes dans leur position zéro.
EP22207387.6A 2022-11-15 2022-11-15 Dispositif de mise à zéro à ressort Active EP4372489B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22207387.6A EP4372489B1 (fr) 2022-11-15 2022-11-15 Dispositif de mise à zéro à ressort
US18/508,425 US20240319676A1 (en) 2022-11-15 2023-11-14 Spring-Loaded Zeroing Device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22207387.6A EP4372489B1 (fr) 2022-11-15 2022-11-15 Dispositif de mise à zéro à ressort

Publications (2)

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EP4372489A1 EP4372489A1 (fr) 2024-05-22
EP4372489B1 true EP4372489B1 (fr) 2025-07-30

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999054792A1 (fr) * 1998-04-21 1999-10-28 Seiko Epson Corporation Dispositif de mesure du temps
JP4296019B2 (ja) * 2003-03-27 2009-07-15 セイコーインスツル株式会社 帰零構造を有するクロノグラフ時計
EP1746471B1 (fr) * 2005-07-20 2019-09-18 Breitling AG Dispositif de remise à zéro de deux compteurs de temps
EP2045672B1 (fr) 2007-10-02 2014-02-26 Omega SA Dispositif de remise à zéro de deux compteurs de temps
CH708999A1 (fr) 2013-12-16 2015-06-30 Société Anonyme De La Manufacture D Horlogerie Audemars Piguet & Cie Dispositif de remise à zéro avec marteaux indépendants.
DE202017107668U1 (de) * 2017-12-18 2018-01-19 Uwe Heinz Nullstellvorrichtung für Minutenzeiger eines Chronographen und Chronograph

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EP4372489A1 (fr) 2024-05-22

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