EP1550013A2

EP1550013A2 - Display device for watch

Info

Publication number: EP1550013A2
Application number: EP03715224A
Authority: EP
Inventors: Robert Greubel; Stephen Edward Methuen Forsey
Original assignee: Vaucher Manufacture Fleurier SA
Current assignee: Complitime SA
Priority date: 2002-10-07
Filing date: 2003-04-22
Publication date: 2005-07-06
Anticipated expiration: 2023-04-22
Also published as: DE60334308D1; WO2004031871A3; ATE482417T1; JP2006502384A; US20050259520A1; AU2003219413A8; AU2003219413A1; US7275859B2; WO2004031871A2; EP1550013B1; JP4324108B2

Abstract

The invention concerns a display device for a watch movement comprising: a frame ( 110 ), an assembly of wheels pivotably mounted on the frame and wherein the angular position of a first ( 116 ) and a second ( 120 ) among them is based on the state of an information to be displayed, and a display member ( 126 ) mobile about an axis (A-A), and designed to enable data associated with the first ( 116 ) or the second ( 120 ) wheel to be displayed by the same display member ( 126 ).

Description

Watch display device

The present invention relates to a display device for a watch of the type comprising a movement provided with a frame and a display member, movable in rotation about an axis.

In such watches, the display is made, generally by means of hands mounted on a movement mobile, one hand per function displayed. As a result, for watches with many functions, the number of hands is large and tends to overload the dial. The object of the present invention is to simplify the display by ensuring the indication of at least two pieces of information with the same organ.

According to the invention, the display device comprises:

"a display mobile, pivotally mounted on the frame around said axis and arranged to carry said member, • first and second information wheels, the angular position of each of which depends on the state of the information to which it is associated,

"first and second connecting members intended to connect the first and second information wheels respectively to the display mobile and to position it so that said display member occupies a position corresponding to the state of said function, and

"A manual control member cooperating with the connecting members so that either one or the other provides the link between the information wheel with which it is associated and the display mobile.

Thus, by the control member, the user can control the display of one or the other of the information, one or the other of the connection members kinematically connecting one of the information wheels to the display mobile, so that the display mobile has a position corresponding to the angular position of the information wheel concerned. Among the possible solutions, it is advantageous that the first information wheel is coaxial with the display mobile and that the first connecting member comprises a cam and a hammer provided with an elastic member arranged to keep the hammer in abutment against the cam, one being mounted on the display mobile, the other on the first information wheel. In this way, as long as the control member is not activated, the display mobile is rotated in synchronism with the first information wheel.

Other advantages and characteristics of the invention will emerge from the description which follows, made with reference to the appended drawing, in which: "FIG. 1 represents a watch of the chronograph type provided with a display device according to the invention ;

"FIG. 2 is a logic diagram of the operation of the movement according to the invention,

"Figure 3 is a sectional view of a movement provided with a display device according to a first embodiment of the invention, ^u Figures 4a to 4d show the dial side of the movement of Figure 3, in different states corresponding to the steps defined in the diagram of FIG. 2, and

"Figure 5 illustrates the back side of the movement of Figure 3, when the chronograph function is locked.

"Figures 6 and 7 show a part of watch movement provided with a display device according to a second embodiment of the invention, comprising only one hand displaying either the hour or the minute, seen in section on the Figure 6 and in plan in Figure 7. The watch shown in Figure 1 is of the chronograph type, it conventionally comprises a case 10 serving as a housing for a movement, which carries a dial 12, hour hands running time 14, minutes of running time and timed time 16 and seconds of timed time 20.

The display of the current time is corrected by means of a time setting crown 22, connected to the movement organs by a time setting rod not visible in the drawing. The timing functions are performed by three pushers 24, 26 and 28 respectively arranged at two o'clock, four o'clock and eight o'clock. The pusher 24 controls the start and stop of a timed time measurement, while the pusher 26 ensures the setting of the hands 16 and 20 to zero when a timed time measurement has been interrupted. Finally, the pusher 28 allows the chronograph mechanism to pass from a first state, in which it is locked, to a second state in which it is unlocked.

When the chronograph mechanism is locked, the hand 16 displays the minutes of current time, while, when it is unlocked, it indicates the timed time. In the locked state, the pushers 24 and 26 are inactive.

This mechanism is part of a movement which comprises, in a conventional manner and not visible in the drawing, an energy source such as a barrel, a time base such as a balance spring, a gear train, of which only a mobile 29 is visible in FIG. 4a, and an exhaust connecting the gear train to the balance for maintenance, as well as mechanisms for setting the time and chronograph. The different components of the movement are arranged on a frame 30, formed of a plate and bridges, which ensures the relative positioning of the different moving parts.

Figure 2 illustrates the effect of the different pushers according to the states of the chronograph mechanism, which are identified by a capital letter surrounded by a circle. In this figure, a pressure on the pushers 24, 26 and 28, corresponds respectively to the indications P 1, P2 and P3.

In the initial state, identified by A and corresponding to the situation illustrated in Figures 4a and 4b, the chronograph mechanism is locked. The chronograph second hand 20 is at noon and the minute hand 16 displays the current time, the pushers 24 and 26 being inactive.

Pressing P3 unlocks the chronograph mechanism. As a result, the minute hand 16 aligns with twelve hours, thus superposing the second hand of timed time 20. This state, represented in FIG. 4c, is identified by the letter B. The hand of minutes 16 thus thus displays the minutes of timed time, equal to zero at the start of the measurement. In this state, the pushers 24 (PI) and 28 (P3) are active. Pressing PI has the effect of starting the counting of a timed time, the seconds hand of timed time 20 starting to turn and, more slowly, the minute hand 16. This state, represented in FIG. 4d and identified by the letter C, brings the display into a situation as illustrated in Figure 1.

At state B, pressing P3 brings the chronograph mechanism back to its initial state A.

In state C, only the pusher 24 is active. Pressing PI stops the counting of the timed time. The needles 16 and 20 therefore stop in the position corresponding to the measured time, which corresponds to state D, which differs from state B only in that the needles are not at zero.

A new pressure PI then has the effect of restarting the counting, the mechanism thus being in state C, while a pressure P2 brings hands 16 and 20 back to noon, which corresponds to state B. On Figures 4 and 5 and in order to avoid overloading the drawing, the springs have only been shown schematically, by means of an arrow showing the force which they generate, associated with a reference Fi, "i" being equal to the reference of the part on which the spring acts. They are essentially visible in Figure 4b.

More specifically, FIGS. 4a and 4b represent the mechanism in its rest position, corresponding to state A, and FIGS. 4c and 4d in positions corresponding respectively to states B and C in FIG. 2. Among FIGS. 4a to 4d, which show the movement on the dial side, certain parts are removed or partially torn from one or the other of these figures, to better see the underlying parts. In the description relating to the movement described with reference to FIGS. 3 to 5, the terms wheel or mobile are used to differentiate the constituents of the chronograph trainings, respectively of the finishing.

The movement described below with reference to FIGS. 3 to 5 comprises, in a conventional manner and not visible in the drawing, a source of energy such as a barrel, a time base such as a balance spring, a gear train of which only a mobile 29 is visible in FIGS. 3 and 4, and an exhaust connecting the gear train to the balance for maintenance, as well as time setting and chronograph. These different components are arranged on a frame 30, formed of a plate and bridges, which ensures the relative positioning of the different moving parts of the movement.

FIG. 3 represents the central part of the movement, seen in section along the line πi-m of FIG. 4a, with an axis AA corresponding to the axis around which the needles 14, 16 and 20 pivot. The frame 30 carries, fixed rigidly on its face on the dial side, a tube 32 comprising a plate 32a secured to the frame 30 and two cylindrical portions 32b and 32c, of axis coincident with the axis AA and arranged one after the other, connected by a shoulder 32d, and intended to serve as a fixed shaft for pivoting mobiles and wheels, as will be explained below.

A mobile of minutes of current time 34 is pivotally mounted on the tube 32. It is provided with a barrel 34a engaged on the cylindrical portion 32b of the tube 32 and a board 34b having a toothing 34c at its periphery. The barrel 34a, the board 34b and the toothing 34c are made in one piece.

The mobile 34 meshes permanently, by its teeth 34c, with the mobile 29 of the gear train, in a gear ratio chosen so that it performs one revolution per hour of current time.

The board 34b is provided with: "a cutout 34d in the form of an annular portion embracing an angle of

50 ° approximately, the function of which will be specified later,

"of a tenon 34e, on which is pivotally mounted a hammer 36 of connection, as well as

"of a spring tending to push the hammer 36 towards the center and schematically represented by the arrow F36 (FIG. 4b).

A minute hand wheel 38 is arranged to rotate freely on the cylindrical portion 32c of the tube 32. This wheel 38 is visible, in plan, only in FIG. 4c. It comprises a plate 38a provided, at its periphery, with a toothing 38b, and a barrel 38c engaged on the tube 32 and extending upwards sufficiently so that its free end is released and allows the attachment of the needle of the minutes 16. The latter ensures both the display of current time and of the time timed, as will be explained later. The barrel 38c extends below the board 38a. A cam 38d, generally called a heart, and more particularly visible in plan in FIGS. 4a, 4b and 4d, is fixed there by hunting or welding. Its underside is in abutment against the shoulder 32d. This cam 38d is arranged so that it can cooperate with the hammer 36, as will be explained later.

The movement includes an isolation device, the component reference of which begins with 39 and which includes an isolation mobile 391 mounted on the barrel 34a, a rocker 392, a retaining wheel 393 pivotally mounted on the rocker 392, a lever 394 insulation and a pawl 395 mounted on the lever 394 (Figure 4a).

The mobile 391 comprises two superimposed boards 391a and 391b, rigidly connected to one another and provided at their periphery with teeth respectively referenced 391c and 39 ld, and a pin 391e fixed in the board 391a (FIG. 3). The latter, lower, is provided with wolf teeth, clearly visible in FIG. 4a, while the toothing 39 ld, of the upper board 391b has the same number of teeth and has the same profile and the same diameter as the toothing 34c. . The pin 391e is engaged in the cutout 34d and extends to the level of the hammer 36.

The retaining lever 392 is mounted on the frame 30, pivoting in its middle part. It carries, at one of its ends, the wheel 393 which can turn on a tenon 392a driven into the lever 392, while the other end forms a nose 392b which, as will be explained below, makes it possible to control the movement of the lever 392. A spring F392 tends to apply the nose 392b to a bearing surface. As shown schematically in Figure 3, the wheel 393 is formed of two boards 393a and 393b, connected together by a snap 393c and respectively capable of being engaged with the teeth 34c and 391d. The snap 393c is arranged so that, when the mobile 34 rotates clockwise, the snap is blocked, so that the board 393b drives the mobile 391 in rotation. If, on the contrary, it is the latter which is turned clockwise, only the board 393b is driven, the snap 393c ensuring its declutching function. The lever 394 comprises (FIG. 4a): a body 394a pivotally mounted on the frame 30, by engagement of a hole 394b made at one end of the body 394a of the lever in an unreferenced tenon, integral with the frame 30, - a nose 394c, located in the vicinity of the hole 394b, and intended to control the movement of the lever 394, a tenon 394d driven into the body at the end opposite to that provided with the hole 394b, on which the pawl 395 pivots, and a pin 394e, forming a stop and limiting the movement of the pawl 395.

The lever 394 is positioned by pressing the nose 394c against a bearing surface, by the action of a spring F394. A spring F395 tends to keep the pawl 395 in abutment against the pin 394e.

The insulating mobile 391 can be moved at an angle of approximately 45 ° relative to the mobile 34, by engagement of the pawl 395 in the teeth 391c. During this movement, the pin 391e, moving freely in the cutout 34d, lifts the hammer 36 whose free end is brought out.

When the chronograph mechanism is locked, by means which will be explained below, the hammer 36, positioned by the spring F36 which tends to apply it against the cam 38d, acts as a connecting member between the mobile 34 and the wheel 38, which are thus integral in rotation. This therefore amounts to saying that the minute hand 16, carried by the barrel 38c of the wheel 38, displays the minutes of current time.

To ensure the counting of a timed time, the movement shown in the drawing comprises a chronograph seconds wheel 40, pivotally mounted in the tube 32, visible in FIG. 5 and partially in FIG. 3, as well as a walkman 42 ( Figures 3, 4c and 5). The wheel 40 comprises a shaft 40a, pivotally mounted in the tube 32 and in the frame 30, a board 40b driven on the shaft 40a and provided with a toothing, a cam 40c, also driven on the shaft 40a, and a training finger 41. The chronograph mechanism further comprises and not visible in the drawing, a clutch provided with a wheel which, when the chronograph mechanism is in state C, kinematically connects the wheel 40 to the gear train, so that it is rotated, one revolution per minute. Such a clutch is well known to those skilled in the art.

The player 42 includes a shaft 42a (FIG. 3) rotatably mounted in a stone 43, with an olive hole, driven on a bridge of the frame 30 and on a rocker 44, itself pivoting on the frame 30 and which will be described in more detail detailed below. It further comprises two wheels 42b and 42c, respectively intended to cooperate with the finger 41 and with the wheel 38. Depending on the position occupied by the lever 44, the wheel 42b is or is not in the space swept by the finger 41. Furthermore, the wheel 42c is permanently engaged with the toothing 38b. The rocker 44 tends to move in the direction of the center of the movement, under the effect of a spring F44 (Figure 5).

When the chronograph mechanism is in one of the states B, C or D, the hammer 36 is lifted by the pin 391e, so that it is no longer in abutment against the cam 38d. The mobile 34 and the wheel 38 are therefore no longer integral in rotation. In addition, when the mechanism is in state C, the shaft 42a is arranged parallel to the axis AA and its wheel 42b can be rotated by the finger 41, by one step at each revolution of the wheel 40. In other words, the player 42 performs a function of link between the timed seconds wheel 40 and the wheel 38, so that the latter allows the display of the minutes of timed time when the mechanism is found in state C or D.

The connecting members formed by the hammer 36, the spring F36 and the cam 38d on the one hand, the player 42 on the other hand, together perform a function of switching means.

As the mobile of the minutes of current time 34 rotates continuously, driven by the gear train, it is necessary that the mobile of isolation 391 rotates with it, otherwise the control of the hammer 36 could no longer be ensured. For this purpose, the retaining wheel 393 is brought into engagement with the teeth 34c of the mobile 34 and 391 d of the isolation mobile 391, the two boards 393a and 393b being made integral in rotation by the snap-fastening 393c. To perform the functions as defined with reference to FIG. 2, the chronograph mechanism shown in FIGS. 4 and 5, comprises, in addition to the cogs and the isolation device described above: a switch making it possible to return activates or not the timing function, and whose constituent parts are defined by references starting with 46, a control device, controlling the start and stop of a measurement, and whose constituent parts are defined by references starting par 48, and - a zero-setting device, making it possible to reinitialize the timed time counters, and the constituent parts of which are defined by references starting with 50.

It will be noted that these devices interact and that certain parts are arbitrarily defined as being part of one rather than the other device.

$

The switch 46 is controlled by the push-button 28. It makes it possible to bring the minute hand 16 to zero, and to activate the push-button 24. It has, for this purpose (FIG. 4a): - a switching member 461, including:

"a body 461a in the shape of a bird, with a head 461b provided with a hole 461c in which is engaged a rod passing through the frame 30 right through and carrying a finger

461d visible in FIG. 5, a beak 461e, two wings 461f and 461g, the wing 461g being provided with a pin 461h, and a tail 46 lj, the head being arranged on the side of the center of the movement and the tail 46 lj on the outskirts, around 7 am,

"a lever 461k pivotally mounted on the tail 46 lj and extending around the periphery of the movement from 7 to 9 hours, provided with a pin 461m arranged so as to be find or not on the path traveled by the pusher 28 when it is actuated according to the position occupied by the lever 461k, and with a stop 46 In disposed at its free end,

"a pawl 46 lp pivotally mounted on the lever 46 lk and limited in its movement by the stop 46 In, a switching cam, for example a column wheel 462, diagrammatically shown, controlled in rotation by the pawl 46 lp, rotating on the frame 30 at 462a, and cooperating with the noses 392b of the rocker 392 and 394c of the lever 394, - an interlocking lever 464, comprising an elongated body 464a, pivotally mounted on the frame 30 in its middle part, and one end of which is provided with a nose 464b arranged to cooperate with the columns of the wheel 462, while the other end comprises a first oblong hole 464c in which a stud 465 is slidably mounted, intended to cooperate with the control device 48, and a second oblong hole 464d, in which is housed a pin with head 466, itself fixed on the frame 30, ensuring the positioning of the lever in the plane of movement. t positioned by springs schematically shown in FIG. 4b, and more particularly: the body 461a by the spring F461 a, the lever 461k, by the spring F461k which tends to bring it back when pressure has been applied to the pusher 28, - the pawl 46 lp by the spring F461p which keeps it in abutment against the pin 46 In, the body 464a by the spring F464a, which tends to apply the nose 464b against the wheel 462, and the stud 465 by the spring F465 which tends to press it on the outside of the oblong hole 464c. The control device 48 is more particularly visible in FIG. 5. It comprises: a control lever 481 comprising:

"a body 481a disposed at the periphery of the movement from 2 to 7 hours, which pivots at 481b on the frame 30 slightly below 4 hours, and which is provided, at one of its ends, with a folding 481c s 'extending in the thickness of the pad 465, and

"a pawl 481d, pivotally mounted on the other end of the body 481a, the function of which will be specified below, a cam 482, for example of column wheel type, driven by the pawl 48 ld, which controls the clutch of chronograph, not shown in the drawing, and positions the switching member 461 by its finger 46 ld. The constituent parts of the control device 48 are positioned by springs and more particularly: the body 481a, by the spring F481a which tends to bring back when a pressure has been applied to the pusher 24, and the pawl 481d, by the spring F481d, which applies it against the cam 482.

The reset device 50 comprises: a reset lever 501 (FIG. 4a), disposed and mounted pivoting at the periphery of the frame 30 and extending from 4 hours to 6 hours, provided at its end close to 4 hours a pin 501a intended to cooperate with the pusher 26, and at its other end with a groove 501b intended to cooperate with the pin 46 lh, a hammer 502 for resetting the minutes placed in the vicinity of the column wheel 462 and extending up towards the central part of the movement to cooperate with the cam 38d by a bearing surface 502a, provided with: ^“ A nose 502b, which cooperates with the columns of the wheel 462, and

"of a pin 502c intended to cooperate with the wing 461f, and - a hammer 503 for resetting seconds (FIG. 5) pivotally mounted on the opposite face of the frame 30 in the vicinity of the cam 482, provided:

"of a nose 503a, cooperating with the cam 482,

"of a retaining finger 503b cooperating with the lever 44 by means of a pin 44a which the latter comprises, and

"of a bearing surface 503c intended to bring the seconds hand to zero by coming to bear against the cam 40c. The constituent parts of the zeroing device 50 are positioned by springs and more particularly: the lever 501 , by the spring F501, which tends to bring it back after a pressure has been applied to the pusher 26, the hammer 502 by the spring F502, which tends to apply the bearing surface 502a against the cam 38d, and the hammer 503 by the spring F503, which tends to apply it against the cam 40c.

The movement further comprises a moving body of the hours of current time 52, pivotally mounted on the barrel 38c of the wheel 38 of the minute hand. The mobile 52 carries the hour hand 14 of current time. It is kinematically connected to the mobile 34 by a timer train, which divides the movement by a factor of 12. This timer train has not been shown to avoid overloading the drawing.

When the chronograph mechanism is at rest, ie in state A defined with reference to FIG. 2, its constituent parts are in the position shown in FIGS. 4a, 4b and 5. More specifically, the nose 392b of the lever retaining 392 is located between two columns of the column wheel 462 under the effect of the spring F392, so that the retaining wheel 393 is not engaged with the teeth 34c and 391d. The nose 394c of the lever 394 is also between two columns under the effect of the spring F394, so that the pawl 395 is set back from the teeth 391c. Thus, the hammer 36, under the action of the spring F36, bears against the cam 38d. The wheel 38 of the minute hand therefore rotates in synchronism with the mobile of the minutes of current time 34.

The engagement lever 464 is supported, by its nose 464b and under the effect of the spring F464a, against a column of the wheel 462, so that the stud 465 is not interposed between the pusher 24 and the folding 481c, which makes the pusher 24 inactive. Furthermore, an action on the pusher 26 pivots the lever 501, but without it acting on other parts.

Pressing the pusher 28 actuates the pin 461m, which carries with it the lever 461k, which switches the chronograph mechanism. More precisely, the tilting of the lever 461k, causes the pawl 46 lp, which rotates the column wheel 462 and generates the following movements, which take place practically simultaneously or in the following order: the nose 392b of the retaining lever 392 is lifted by a column, which brings the wheel 393 into engagement with the teeth 34c and 391d; the nose 394c of the lever 394 is raised, so that the pawl 395 engages with the toothing 391c, driving in rotation, clockwise, the mobile 391 and the only board 393b, the board 393a, engaged with the mobile 34, being disengaged, because of the snap 393c; during the relative movement of the mobile 391 with reference to the mobile 34, the pin 391e lifts the hammer 36, so that the cam 38d of the wheel 38 is no longer kept in phase with the mobile 34; - The nose 502b of the hammer 502 falls, under the effect of the spring F502, between two columns of the wheel 462, the bearing surface 502a coming to cooperate with the cam 38d so that the wheel 38, which carries the needle 16, brings the latter to midday; and the nose 464b of the engagement lever 464 falls between two columns of the wheel 462 under the effect of the spring F464a, bringing the pad 465 between the pusher 24 and the folding 48 le.

The mechanism is then in state B defined in Figure 2 and shown in Figure 4c. The link member formed by the hammer 36 and the cam 38d then no longer ensures the link between the wheel 38 and the mobile 34. The switch 46 thus plays the role of control member, and deactivates this link member. In this state, the pushers 24 and 28 are functional. By pressing the pusher 28 again, the lever 461k, switches and drives the pawl 461p. This rotates the column wheel 462, which generates the following movements, which take place practically simultaneously or in the following order: the nose 392b of the retaining lever 392 falls between two columns of the wheel 462 under the effect of the spring F392, the wheel 393 thus emerging from the teeth 34c and 39 ld; the nose 502b is lifted by a column, so that the hammer 502 releases the cam 38d; the nose 394c falls between two columns and the lever 394 returns to the position shown in FIG. 4a under the effect of the spring F394; under the effect of the spring F36, the hammer 36 tilts and bears against the pin 391e, which rotates the isolation mobile

391, then against the cam 38d which drives the wheel 38 until the hand 16 again displays the minutes of current time; and the nose 464b of the engagement lever 464 is lifted by a column of the wheel 462, so that the stud 465 leaves the space between the folding 481c and the pusher 24. The mechanism has thus returned to state A shown in Figure 4a. From state B, shown in FIG. 4c, it is also possible to activate the pusher 24, which has the effect of starting a measurement of timed time. More specifically, the pusher 24 presses against the pad 465, which slides in the oblong hole 464c and, applied against the folding 481c, pivots the body 481a of the lever 481. Its pawl 48 ld, more particularly visible in FIG. 5, makes turn cam 482 by one step. This movement of the cam 482 generates the movements described below, which take place practically simultaneously or in the following order: the hammer 503, visible in FIG. 5, is lifted by its nose 503a, so that the surface d 'support 503c is released from the cam 40c; the chronograph clutch brings the clutch wheel into gear with both the gear train and the seconds wheel

40 chronograph, so that the latter is rotated and, with it, the chronograph seconds hand 20; the retaining finger 503b releases the pin 44a from the rocker 44, so that the spring F44 rotates the rocker 44, the wheel 42b then being positioned so that it is in the space swept by the finger 41, which can thus rotate the player 42 and, by it, the wheel 38 of the minute hand, at a rate of one step per minute; and the finger 46 ld is lifted by a column of the cam 482, which causes the body 461a (FIG. 4b) to tilt and the lever 461k of the switching member 461. In this way, the pin 461m is offset relative to the push-button 28, thus rendering the latter inactive. In addition, the wing 461f lifts the hammer 502 by its pin 502c, thus authorizing the rotation of the wheel 38 of the minute hand. ^'In addition, the pivoting of the body 461a 461h causes its pin in the groove 501b of the reset lever 501. During this operation, the connecting member forms the player 42, controlled by the control device 48 via the hammer 503, goes from the deactivated state to the activated state.

The mechanism is then in the position shown in FIG. 4d, which corresponds to state C of FIG. 2. In this state, only the pusher 24 is active. Indeed, the pin 461m is offset relative to the pusher 28, which makes the latter inactive. In addition, the body 461a, the position of which is defined by the finger 46 ld pressing against a column of the cam 482, remains in this position, even if the groove 501b releases the pin 461h. In other words, pressing the pusher 26 has no effect. Pressing the pusher 24 brings it into abutment against the stud 465 which slides in the oblong hole 464c and, applied against the folding 481c, makes the lever 481 pivot. Its pawl 48 ld (FIG. 5) rotates the cam 482 d 'a new step. This movement of the cam 482 generates the movements described below, which take place practically simultaneously or in the following order: - the chronograph clutch is moved, so that the chronograph seconds wheel 40 is no longer connected to the gear train, which makes it stop; finger 461d passes from the support against a column of the cam

482 in a position in which it is between two columns, without the body 461a and the finger 461 d pivoting, because the body 461a is retained by the pin 461 h engaged in the groove 501b of the lever 501; and the nose 502a of the hammer 502 is between two columns of the wheel 462, but does not change position, because of the pin 502c which is in abutment against the wing 461f of the body 461a.

The hammer 503 is retained by means similar to those retaining the hammer 502, but which have not been shown to avoid overloading the drawing. The chronograph mechanism is then in state D of the logic diagram in FIG. 2. This state, which is not shown in the drawing, allows action on pushers 24 and 26. Pressing pushbutton 24 starts again. counting the time, the mechanism returning to state C by a new rotation of the cam 482. Thus, the chronograph clutch is reset, while the hammer nose 503a and the finger 461d are in abutment against a column of the cam 482.

When the mechanism is in state D, a pressure exerted on the pusher 26 drives the lever 501 which, by pivoting, releases the pin 461 h. As the finger 46 ld is between two columns of the cam 482 there is nothing holding it back, so that the spring F461a brings the switching member 461 back to the position shown in FIG. 4b. In addition, the hammer 502 is no longer retained by the wing 46 lf, so that its spring F502 causes it to tilt and bear against the cam 38d, which has the effect of bringing the minute hand 16 to zero. A similar process is applied to the hammer 503, so that the cam 40c is also subjected to a force which brings the timed second seconds hand back to noon 20. The chronograph mechanism is again in the defined state B above, so that it is possible to press on the pusher 28, to return the mechanism to state A, where the pusher 24 and 26 are inactive and where the minute hand 16 displays the minutes of time current. It is also possible to press push-button 24 to start a new measurement, the mechanism being in state C.

The display device shown in Figures 6 and 7 provides the indication of either the minute or the hour. It is shown in the display position of the minute in FIG. 7a, of the hour in FIG. 7b. It is intended to equip a watch movement comprising a frame 110, which carries a source of energy, in this case a barrel 112, visible in FIG. 6, which drives a gear train, the first mobile of which is a wheel of the minutes 114. The latter, positioned at the center of the movement, pivots on the frame 110 around an axis AA and carries a pavement 116 frictionally mounted and which meshes with a timer wheel 118, which drives a hour wheel 120.

The carriageway 116 and the hour wheel 120 perform respectively one revolution in sixty minutes and in twelve hours, their angular position defining the state of the information to be displayed. They therefore provide an information wheel function. In addition, the pavement 116 and the timer wheels 118 and hours 120 play the role usually assigned to the clockwork in the classic watch movements, with the difference that none of these mobiles carries a needle.

More precisely, the roadway comprises a tubular portion 116a, pierced right through and engaged in friction on the large medium wheel 114, a pinion 116b secured to the portion 116a and meshing with the timer wheel 118, a wheel board 116c, fixed to the portion 116a, provided with a toothing 116d and carrying a hammer 122. The latter is pivotally mounted on a tenon 123 driven into the board 116c. This hammer is subjected to the action of a spring, schematically represented by an arrow FI in FIGS. 7a and 7b, which tends to push the hammer 122 in the direction of the axis A-A.

The carriageway 116 carries, free in rotation, a display mobile 124 comprising, rigidly integral with each other, a board 124a provided with a toothing 124b at its periphery, a barrel 124c engaged on the tubular portion 116a and a cam 124d interposed between the board 124a and the board 116c, at the same height as the hammer 122. In this way, under the effect of the spring FI, the hammer 122 is applied against the cam 124d. As a result, the display mobile 124 is rotated by the roadway 116, by means of the hammer 122 and the cam 124d, performing one revolution in sixty minutes. This situation is illustrated in Figure 7a. The barrel 124c carries a hand 126 which, under the conditions described above, therefore displays the minute of current time.

The hour wheel 120 is offset from the center of the movement. It comprises a board 120a provided with a toothing 120b at its periphery which meshes with the pinion of the timer wheel 118. It is arranged to rotate freely on a tube 128 driven onto the frame 110. It carries a hammer 130 pivotally mounted on a post 130a driven into the board 120a. This hammer 130 comprises a head 130b and a shank 130c arranged on either side of the pivot point, the function of which will be specified below. The board 120a has an opening 120c in the form of an annular portion and extending over an angle of approximately 90 ° (FIGS. 7a and 7b).

A control wheel 132 is mounted coaxially with the hour wheel 120 around the tube 128. It comprises a board 132a interposed between the wheel 120 and the frame 110 and provided, at its periphery, with teeth 132b. A pin 132c is driven into the board, arranged so that it is engaged in the opening 120c and protrudes from this opening, extending in the thickness of the hammer 130, and arranged so as to cooperate with the tail 130c. The boards 120a and 132a are each provided with a hole identified by the letter e. A wire spring 134 is interposed between these boards, its ends being engaged in the holes 120e and 132e (Figures 7a and 7b). This spring tends to hold the wheels 120 and 134 in a relative position such that the pin 132c is located substantially at one of the ends of the opening 120c. The display device further comprises a wheel 136 comprising, rigidly integral with each other, a board 136a provided with teeth 136b at its periphery, a shaft 136c rigidly fixed to the board 136a and pivotally engaged in the tube 128, as well as a cam 136d, interposed between the boards 136a and 132a, at the same level as the hammer 130. The wheel 136 has the same diameter and the same number of teeth as the indication wheel 124 with which it is connected kinematically by means of a reference 138 pivotally mounted on the frame 110.

As explained above, the hand 126, carried by the indication wheel 124, displays the information defined by the angular position of the minute wheel 114 when the device is in the position illustrated in the figure 7a.

If, now, by means which will be described later, the wheel 132 is turned relative to the wheel 120, the pin 132c moves in the opening 120c. During this movement, it comes to bear against the tail 130c of the hammer 130 and raises it, so that the head 130c is pushed against the cam 136d and exerts a pressure which causes the rotation of the wheel 136 until it is in press on the most central part of the cam 136d. In this position, the wheel 136 occupies an angular position corresponding to that of the hour wheel 120. In addition, the tail 130c is arranged so that the pin 132c is held in its extreme position, which corresponds to a function notch. As the reference 138 connects the wheel 136 to the indication wheel 124, the latter is also driven in rotation. The wheels 124 and 136 having the same number of teeth, they rotate in the same direction and at the same speed as the hour wheel 120. Pavement 116 is not involved in this movement. The hammer 122 is therefore lifted. In other words, the movement of the wheel 132 with reference to the hour wheel 120 changes the display from the indication of the minutes to that of the hours.

To ensure the movement of the wheel 132, the device according to the invention further comprises a control 140 slidingly mounted on the frame 110, a rake 142 disposed in the vicinity, the same new as the wheel 132, and controlled by a finger 140a that includes the control 140 and a spring 144 cooperating with the rake 142 to maintain it, in the rest position, in the position shown in FIG. 7a. A pusher, not shown in the drawing, mounted sliding in the watch case, cooperates with the control 140 and pushes it in the direction of the axis A-A. The finger 140a tilted the rake 142, which drives with it the wheel 132, which controls the display of the time, by the process which has just been described.

As soon as the pusher is released, the spring 144 returns the rake 142 to its starting position which, by this movement, rotates the wheel 132. In this way, the pin 132c no longer retains the tail 130c of the hammer 130 The spring 134 participates in this movement and reposition the wheel 132 in a position relative to the wheel 120 corresponding to that shown in FIG. 7a, the hand 126 therefore displaying the minutes again.

Claims

claims

1. Display device for watch movement of the type comprising: - a frame (30; 110),

"a set of wheels pivotally mounted on the frame and the angular position of a first (34; 116) and a second (40; 120) of them is a function of the state of information to be displayed , and "a display member (16; 126) movable around an axis (AA), characterized in that it comprises, in combination:" a display mobile (38; 124), pivotally mounted on the frame (30; 110) around said axis (AA) and arranged to carry the display member (16;

126), "connecting means (36, 38d, 41, 42; 122, 124d, 130, 136, 138) intended to ensure a kinematic connection of said mobile (38; 124) with one or the other of the first (34; 116) and second (40; 120) wheels, and

"actuating means (39, 42, 44; 132) intended to cooperate with the connecting means and arranged so as to allow switching of the connection of said mobile from one to the other of said first and second wheels.

2. Device according to claim 1, characterized in that the first wheel

(34; 116) is coaxial with said mobile (38; 124), and in that said connection means comprise a cam (38d; 124d) fixed in rotation with said mobile display (38; 124) and a first hammer ( 36; 122) disposed on the first wheel (34; 116) facing said cam and provided with an elastic member (F36; FI) arranged to keep it in abutment against the cam, so that said first wheel ( 34; 116) can drive said mobile (38; 124) in rotation by the action of the hammer (36; 122) on the cam (38d; 124d).

3. Device according to claim 2, characterized in that said control means comprise a control mechanism (44, 48, 50) and a switching mechanism (46), activating or not activating the control mechanism and cooperating with the first hammer (36) so that it is removed from the cam (38d) when said control mechanism (44, 48, 50) is activated.

4. Device according to claim 3, characterized in that said control mechanism (44, 48, 50) is of the chronograph type.

5. Device according to claim 2, characterized in that said second wheel (120) is pivotally mounted about an axis substantially parallel to the axis (AA) of the mobile (124) and in that the connecting means (122 , 124d, 130, 136, 138) further include:

"a connecting wheel (136) arranged coaxially with the second wheel (120), and kinematically connected to said mobile (124),

• a second hammer (130) and a second cam (136a), arranged one on the connecting wheel (136) the other on the second wheel (120), and in that the actuation means comprise a member clutch-release clutch (132) arranged to apply or not the second hammer (130) against the second cam (136a) so that, when applied, the torque generated on the mobile (124a) by the wheel link (136a) is greater than that exerted by the first hammer (122) on the first cam (124d).

6. Device according to claim 5, characterized in that a return wheel (138) is interposed between the connecting wheel (136) and the mobile (124), so that said mobile rotates in the same direction as the second wheel, when they are kinematically connected to each other.

7. Device according to one of claims 1 to 6, characterized in that said actuating means are of mono-stable type and arranged so that, during an actuation, the connecting means connect said mobile

(124) to one (120) of said wheels and when the actuation is interrupted, the connecting means connect the mobile to the other wheel (116).

8. Device according to one of claims 1 to 6, characterized in that said actuating means are of the bi-stable type and arranged so that, during a first actuation, the connecting means connect said mobile (38) to one (40) of said wheels and during a second actuation, the connecting means connect the mobile (38) to the other wheel (34).