CN106970512B

CN106970512B - Regulating device for a timepiece

Info

Publication number: CN106970512B
Application number: CN201611143970.2A
Authority: CN
Inventors: 斯特凡·迈鲍姆
Original assignee: Lange Uhren GmbH
Current assignee: Lange Uhren GmbH
Priority date: 2015-12-22
Filing date: 2016-12-13
Publication date: 2020-01-14
Anticipated expiration: 2036-12-13
Also published as: CN106970512A; CH711976A2; JP6329237B2; DE102015122629B3; CH711976B1; JP2017116546A

Abstract

The invention relates to an adjusting device for a timepiece, comprising an adjusting shaft which is displaced from a normal position into a zero position by an axial movement, by which movement a spring-force-driven zero drive is triggered, by which a pointer is driven into the zero position in a movable manner. The hand shaft is in a force-fit coupling connection with the clockwork spring device, and a prestressed connecting key is arranged between the gear drives of the hand shaft and the clockwork spring device, and loads the coupler in the coupling direction. The coupler is a releasable force and/or form-fitting coupler, comprising: the first coupling disc is coaxial with the pointer shaft, and the pointer shaft is connected with the first coupling disc in a torsion-proof manner; second and third coupling disks which are connected in a rotationally fixed manner by means of a gear drive and which receive the first coupling disk coaxially with the pointer shaft between them and are acted upon by a force from a connecting link; the second and third coupling discs can be moved by their friction position, in which they bear with a friction fit against the first coupling disc, into their open position, in which they are lifted from the disc, by the movement of the separating device, which is operated by the adjusting shaft.

Description

Regulating device for a timepiece

Technical Field

The invention relates to an adjusting device for a timepiece, having an adjusting shaft which can be moved by an axial movement from a normal position into a zero position, wherein a spring-driven zero drive can be triggered by a movement of the adjusting shaft from the normal position into the zero position, by means of which a pointer, which is arranged fixedly on the pointer shaft, can be driven movably into the zero position, and having a coupling, by means of which the pointer shaft of the pointer is coupled in a force-fitting manner to a spring assembly of the timepiece, wherein a prestressed connecting link is arranged between the pointer shaft and the gear drive of the spring assembly, which acts upon the coupling in the coupling direction.

Background

In order to be able to zero the hands, without this involving the drive of the spring motor, in devices of this type for adjusting the hands of a timepiece, a coupling is known by means of which the hand shaft of the hands is coupled in a force-fitting manner to the spring motor of the timepiece and is decoupled in order to return the hands to their original position.

Disclosure of Invention

The object of the invention is to provide a device for resetting the hands of a timepiece of the type mentioned at the outset, which enables an easy zero position of the hands with a small overall size.

This object is achieved according to the invention in that the coupling is a releasable force-and/or form-fitting coupling having a first coupling disk which is coaxial with the pointer shaft, to which the pointer shaft is rotationally fixed and which has a second coupling disk and a third coupling disk which are rotationally fixed with the gear drive, wherein the second coupling disk and the third coupling disk accommodate the first coupling disk coaxially with the pointer shaft and are force-loaded by a connecting key against the first coupling disk, and the coupling has a release device which can be actuated by the adjusting shaft and by means of which the second coupling disk and the third coupling disk can be moved by their friction position, in which they bear in a friction-fitting manner against the first coupling disk, into their open position, in which they are lifted from the first coupling disk, by a movement of the adjusting shaft from the normal position into the neutral position.

The hand is preferably a second hand and the hand shaft is a second hand shaft.

The minute hand can be adjusted, for example, by an adjustment shaft. The adjusting shaft may however also be used for the winding of a timepiece.

In order to restore the original position, the coupling is disconnected by lifting the second and third coupling plates from the first coupling plate, thereby releasing the connection between the pointer shaft and the gear drive of the timepiece, so that the pointer shaft can be moved into the zero position at least largely without resistance.

A small overall size is achieved by only a single connecting key which acts in the closing direction (schliessichtung) not only on the second but also on the third coupling plate.

In addition, a small overall size is achieved in that two coupling disks, i.e. the second and third coupling disks, are present for connecting the coupling, which can have a small diameter at high coupling forces.

When the second coupling plate has a plurality of pegs parallel to the pointer axis, the second and third coupling plates can be held in a simple manner by means of a single connecting key against the first coupling plate, wherein the pegs are force-loaded by the connecting key loading the third coupling plate against the first coupling plate, so that the pegs pull the second coupling plate against the first coupling plate.

The connecting link can be a spring with a plurality of radially oriented spring arms, wherein each radially inner spring arm end acts on the third coupling disk and wherein each radially outer spring arm end is axially supported on one of the struts, in order to save weight.

In order to simultaneously lift both the second coupling plate and the third coupling plate from the first coupling plate, the separating device can have at least one expansion wedge which can be moved from a non-separating position, in which it is radially spaced apart from the second coupling plate and the third coupling plate, into a separating position, in which it is introduced between the second coupling plate and the third coupling plate radially toward the first coupling plate, wherein the expansion wedge has a thickness in the direction of extension of the pointer shaft which is greater than the thickness of the first coupling plate.

In order to be able to insert the expansion wedge simply radially between the second coupling disk and the third coupling disk, the expansion wedge has a thickness on its end facing the first coupling disk in the radial direction that is smaller than the thickness of the first coupling disk, wherein the thickness of the expansion wedge expands with radial distance from the first coupling disk to a thickness that is greater than the thickness of the first coupling disk.

The first and second coupling discs are uniformly lifted from the first coupling disc when the separating device has two at least approximately diametrically opposite spreading wedges which are jointly movable by the adjusting shaft between their separating position and their non-separating position.

By an axial movement of the adjusting shaft in the direction of its normal position in the neutral position, the actuating lever or actuating lever arrangement can be driven in an oscillating manner about an axis or respectively about an axis from a home position (rheostatic) into a triggering position, which triggers the neutral drive.

If the expansion wedge is arranged on an expansion wedge lever at a distance from the expansion wedge axis, wherein the expansion wedge lever is pivotably supported about the expansion wedge axis and can be pivotably driven by a control lever or a control lever device from a non-release position into a release position, the control lever or the control lever device can control both the zero drive and the expansion wedge of the release device in a component-saving manner.

In a simple embodiment, the neutral drive has a reversing lever (Herzhebel) which is mounted so as to be pivotable about a reversing lever axis and which is driven so as to be movable by an axial movement of the actuating shaft from a normal position into a neutral position, wherein the reversing lever has an actuating surface at a distance from the reversing lever axis, which surface is maintained in the normal position of the actuating shaft at a radial distance from an axially running cardioid of a cardioid disk mounted fixedly on the pointer shaft and which rests against the cardioid under spring force in the neutral position.

In order to avoid the adjusting surface of the reversing lever from abutting against the radially encircling cardioid curve in the case of the adjusting shaft in the normal position, the actuating lever or actuating lever arrangement can have a distance-maintaining pin in a relatively simple manner, by means of which the radial distance of the adjusting surface of the reversing lever to the radially encircling cardioid curve is maintained in the normal position of the reversing lever.

In order to stop the spring motor during the adjustment of the hands, the holding device can be actuated by the adjusting shaft when it moves from the normal position into the neutral position in order to stop the spring motor of the timepiece.

If the holding device can be actuated by means of an actuating lever or actuating lever device, the actuating lever or actuating lever device also fulfills an additional function, which leads to a further reduction in components and thus also to a reduction in the installation space.

Drawings

Embodiments of the invention are illustrated in the drawings and are described further below. The figures show that:

figure 1 is a top view of the adjustment device in the normal position,

figure 2 is a cross-section along line a-a in figure 1,

figure 3 is a top view of the adjusting device according to figure 1 in the zero position,

figure 4 is a cross-sectional view taken along line B-B of figure 1,

fig. 5 is a bottom view of the coupler, null device and decoupling device of the adjustment device of fig. 1 in a normal position.

Detailed Description

The illustrated adjusting device for adjusting a timepiece has an adjusting shaft 1 which can be moved axially from its normal position illustrated in fig. 1 into its adjusting position illustrated in fig. 3. The adjusting shaft can have a crown at its right-hand end projecting from a not shown watch case, by means of which crown, in the case of the adjusting shaft in the adjusting position, for example, the minute hand of the timepiece can be adjusted by rotation of the adjusting shaft.

The adjusting shaft 1 has an annular groove 2, in which one end of a two-armed first actuating lever 3 engages in such a way that it can be driven from a home position (fig. 1) into a trigger position (fig. 3) in a pivotable manner about an axis 4 by an axial movement of the adjusting shaft 1 from a normal position into an adjusting position.

At the second end of the actuating lever 3, a pin 5 is arranged, which projects parallel to the axis 4 and by means of which a first arm 6 of a two-armed reversing lever 7, which can be pivoted about a reversing lever axis 8, can be pivoted from a neutral position into a normal position and a second arm 9 of the reversing lever 7 can be pivoted from its normal position into its neutral position. The free end of the second arm 9 of the reversing lever 7 that can be acted upon by the pin 5 is designed as a spring arm 10.

At a distance from the reversing lever axis 8, the second arm 9 thereof has an adjusting surface 11 which, in the normal position of the reversing lever 7, is at a radial distance from a radially encircling heart curve 12 of a heart curve disk 13 which is fixedly arranged on a seconds hand shaft 14 carrying a seconds hand 15 and can be driven in rotation about a hand axis 47.

If, by actuating the adjusting shaft 1, the switching lever 7 is pivoted by means of the first actuating lever 3 from its normal position (fig. 1 and 2) into its zero position (fig. 3 and 4), the adjusting surface 11 is spring-loaded by the spring arm 10 against the cardioid curve 12. By radial loading of the adjusting surface 11 on the heart curve 12, the heart curve disk 13 is pivoted until the adjusting surface 11 reaches a radial minimum to the pointer axis 47. As a result, the seconds hand 15 arranged on the seconds shaft 14 also moves into its zero position.

Furthermore, a first coupling disk 16 is fixedly arranged on the seconds shaft 14. A second coupling disc 17 and a third coupling disc 18, which are coaxial with the first coupling disc 16, are arranged on one side of the first coupling disc 16, respectively.

The second coupling disc 17 and the third coupling disc 18 have a larger diameter than the first coupling disc 16. In the radially outer circumferential region, two struts 19 are arranged uniformly distributed over the circumference on the second coupling disk 17, pass radially outside the first coupling disk and project with as little play as possible through the opening of the third coupling disk 1, and have stops 24 projecting radially circumferentially at their free ends.

The connecting link 20 surrounds with its radially inner region 21 a sleeve-shaped projection 22 of the third coupling disk 18, which projection projects toward the side remote from the first coupling disk 16, and has two radially outwardly directed spring arms 23, which are each supported with their free ends on one of the stops 24, and, as a result of the prestress of the spring arms 23, the third coupling disk 18 and, via the lever leg 19, also the second coupling disk 17 are pressed toward the first coupling disk 16. In this state, the three

coupling disks

16, 17, 18 are coupled to one another in a non-positive and rotationally fixed manner. The gear drive 25 of the spring drive, not shown, of the timepiece is connected in a rotationally fixed manner to the third coupling plate 18, so that, in the case of the

coupling plates

16, 17 and 18 connected in a rotationally fixed manner to one another, a rotational drive of the first coupling plate 16 by the spring drive and of the seconds hand 14 and the seconds hand 15 by means of the coupling plates is achieved.

Furthermore, the toothed ring 46 is connected to the gear drive 25 in a rotationally fixed manner.

The end of the first actuating lever 3 having the pin 5 engages with the pin 5 in a longitudinal opening 48 at the end of the first actuating lever arm 26 of a two-armed second actuating lever 27 which can be pivoted about the second axis 28 and which can thus be driven by the first actuating lever 3 in a pivoting manner when it is pivoted.

A curve disk 30 having a radially encircling separation curve 31 is arranged in the region of the free end of the second actuating lever arm 29 of the second actuating lever 27. One end 34 of a double-armed first release lever 33, which can be pivoted about the first release lever axis 32, rests on the release curve 31 and can be driven in a pivoting manner as a result of the release curve 31 rising in the clockwise direction. A first spreading wedge 35 is arranged at the second end of the first release lever 33. By means of the pivoting movement of the first release lever 33, the first spreading wedge 35 is movable in the plane of the first coupling disk 16 between a non-release position, which is remote from the first coupling disk 16, and a release position, which is close to the first coupling disk 16.

The spreading wedge 35 has a smaller thickness than the first coupling disc 16 on its end facing the first coupling disc 16, which then increases V-shaped with increasing distance from the first coupling disc 16 to a thickness greater than the thickness of the first coupling disc 16.

On movement of the spreading wedge 35 from its non-separating position into its separating position, it reaches between the second coupling disc 17 and the third coupling disc 18. When the region of the spreading wedge 35 having a greater thickness than the thickness of the first coupling disc 16 is introduced between the second coupling disc 17 and the third coupling disc 18, the two

coupling discs

17 and 18 rise from the first coupling disc 16 and the gear drive 25 of the spring drive, not shown, of the timepiece is thereby also separated from the seconds hand shaft 14, so that the zero position of the seconds hand 15 can be achieved unhindered by the heart-shaped curve disc 13.

In the region of the first release lever axis 32, the first release lever 33 has a transfer lever 36 which extends approximately at right angles to the release lever 33 and with its free end acts on the free end of a receiving lever 37 of a second release lever 38 approximately opposite thereto.

The second release lever 38 is likewise of double-arm design and can be pivoted about a second release lever axis 39.

A second spreading wedge 40, which corresponds to the first spreading wedge 35 and is diametrically opposite the first spreading wedge 35, is arranged at the second end of the second release lever 38.

Starting approximately in the region of the second release lever axis 39, the release lever arm 14 of the second release lever 39, which is designed as a spring arm, starts toward the first actuating lever 3 and rests with its free end region on the pin 5. In this case, the release lever arm 41 is in the non-release position shown in fig. 1 under the prestress of the second release lever 38 loaded with its second expansion wedge in the non-release position. In the release position shown in fig. 3, the release lever arm 41 is not prestressed.

This prestress is also transmitted to the first release lever 33 via the transfer lever 37 and the receiving lever 38.

In the normal position of the adjusting shaft 1 shown in fig. 1 and 2, the first actuating lever 3 and the second actuating lever 27 are in the starting position. In this case, the first end 34 of the first release lever 33 abuts against the release curve 31 of the curve disc 30 in a region close to the second axis 28 of the second actuating lever 27. This achieves that the two spreading

wedges

35 and 40 are pivoted into their non-separating position under the spring force of the separating lever arm 41.

The

coupling discs

17 and 18 abut against the first coupling disc 16 so that the clockwork spring drive of the timepiece can rotationally drive the seconds hand shaft 14 and thus the seconds hand 15.

The actuating surface 11 of the reversing lever 7 is at a radial distance from the cardioid curve 12.

If the adjusting shaft 1 is now moved from its normal position into its zero position shown in fig. 3 and 4, the first actuating lever 3 and the second actuating lever 27 are thereby pivoted out of their initial positions into their trigger positions.

In this case, the first release lever 33 and, by way of it, the second release lever 38 are pivoted from their non-release position into their release position by the release curve 31 of the curve disk 30, which is remote from the second axis 28 of the second actuating lever 27, whereby the first spreading wedge 35 and the second spreading wedge 40 lift the second coupling disk 17 and the third coupling disk 18 off the first coupling disk 16 and thus separate the seconds hand 14 and the seconds hand 15 from the spring drive of the timepiece.

On the other hand, the first arm 6 of the reversing lever 7 is then separated from the pin 5, so that it, under the spring force of its second arm 9, with its adjusting surface 11, is pivoted against the cardioid curve 12 and the cardioid coil 13, and with it the seconds hand 15 and the seconds shaft 14 can be pivoted into the zero position.

In contrast to the first actuating lever 3, the second actuating lever 27 has an actuating projection 42 which, in the initial position of the second actuating lever 27, holds a stop spring 44, which can be pivoted about a stop spring axis 43, in its inactive position, which is lifted from a balance wheel 45, against the spring force.

If the second actuating lever 27 is pivoted into its trigger position, the actuating cam 42 acts with its pivoting outer part on the stop spring 44, so that it bears radially against the axial contour of the balance wheel 45 under the action of the spring force acting on it and brakes it to a standstill.

When the adjusting shaft 1 moves from its zero position back into its normal position, the actuating projection 42 lifts the stop spring 44 from the balance wheel 45 again and releases it again. By means of the reversing lever 7, the adjusting surface 11 is lifted from the cardioid curve 12 and the spreading

wedges

35 and 40 are moved into their non-disengaged position, so that the spring drive can again rotationally drive the seconds shaft 14 and the seconds hand 15 via the gear drive 25.

List of reference numerals

1 adjusting shaft

2 annular groove

3 first operating lever

4-axis

5 Pin

6 first arm

7 reversing lever

8 reversing lever axis

9 second arm

10 spring arm

11 regulating noodle

Curve of 12 heart shapes

13 heart-shaped curve plate

14 second hand shaft

15 second hand

16 first coupling disc

17 second coupling plate

18 third coupling disc

19 pole

20 connecting key

21 region

22 projection

23 spring arm

24 stop part

25 gear driving device

26 first operating lever arm

27 second operating lever

28 second axis

29 second actuating lever arm

30 curve plate

31 separation curve

32 first split lever axis

33 first separating lever

34 first end portion

35 first spreading wedge

36 transfer lever

37 receiving lever

38 second disconnect lever

39 second split lever axis

40 second spreading wedge

41 disengaging lever arm

42 operating projection

43 stop spring axis

44 stop spring

45 balance wheel

46 ring gear

47 pointer shaft

48 are longitudinally open.

Claims

1. An adjustment device for a timepiece, comprising: an adjusting shaft (1) which can be moved by an axial movement from a normal position into a zero position, wherein a spring-force-driven zero drive can be triggered by the movement of the adjusting shaft (1) from the normal position into the zero position, by means of which a pointer, which is arranged fixedly on a pointer shaft, can be driven movably into the zero position; a coupling by means of which the pointer shaft of the pointer is coupled in a force-fitting manner with a clockwork of the timepiece, wherein a prestressed connecting key (20) is arranged between the pointer shaft and a gear drive (25) of the clockwork, which connecting key acts on the coupling in the coupling direction, characterized in that the coupling is a releasable force-fitting and/or form-fitting coupling having a first coupling disk (16) coaxial with the pointer shaft, to which the pointer shaft is connected in a rotationally fixed manner, and a second coupling disk (17) and a third coupling disk (18) which are connected in a rotationally fixed manner with the gear drive (25), wherein the second coupling disk (17) and the third coupling disk (18) accommodate the first coupling disk (16) coaxially with the pointer shaft in the first coupling disk (16) to the clockwork of the timepiece Between the second and third coupling discs and force-loaded by the connecting key (20) against the first coupling disc (16), the coupling having a disconnecting device which can be operated by the adjusting shaft (1), by means of which disconnecting device the second and third coupling discs (17, 18) can be moved by means of a friction position of the second and third coupling discs which bear frictionally against the first coupling disc (16) into an open position of the second and third coupling discs which is raised from the first coupling disc (16) by means of movement of the adjusting shaft (1) from the normal position into the zero position.

2. Adjusting device according to claim 1, characterized in that the second coupling disc (17) has a plurality of studs (19) parallel to the pointer axis, which studs are force-loaded by a connecting key (20) loading the third coupling disc (18) towards the first coupling disc (16), so that they pull the second coupling disc (17) against the first coupling disc (16).

3. Adjusting device according to claim 2, characterized in that the connecting key (20) is a spring having a plurality of radially directed spring arms (23), wherein each radially inner spring arm end acts on the third coupling disc (18), and wherein each radially outer spring arm end is axially supported on one of the lever columns (19).

4. Adjusting device according to one of claims 1 to 3, characterized in that the separating device has at least one expansion wedge (35, 40) which is movable from a non-separating position spaced apart from the second coupling disc (17) and the third coupling disc (18) into a separating position which is introduced between the second coupling disc (17) and the third coupling disc (18) radially towards the first coupling disc (16), wherein the expansion wedge (35, 40) has a thickness in the direction of extension of the pointer shaft which is greater than the thickness of the first coupling disc (16).

5. The adjusting apparatus according to claim 4, characterized in that the expansion wedge (35, 40) has a thickness which is smaller than the thickness of the first coupling disc (16) on its end facing radially towards the first coupling disc (16), wherein the thickness of the expansion wedge (35, 40) expands with radial distance from the first coupling disc (16) to a thickness which is greater than the thickness of the first coupling disc (16).

6. The adjusting apparatus according to claim 4, characterized in that the separating apparatus has two spreading wedges (35, 40) diametrically opposite one another, which are jointly movable by the adjusting shaft (1) between a separating position of the spreading wedges and a non-separating position of the spreading wedges.

7. Adjusting device according to claim 4, characterized in that the actuating lever or actuating lever arrangement (3, 27) can be driven in an oscillating manner about the or each axis (4, 28) from a home position into a trigger position, which triggers the zero position drive, by an axial movement of the adjusting shaft (1) in the direction of the zero position from the normal position.

8. The adjusting apparatus according to claim 7, characterized in that the spreading wedge (35, 40) is arranged on a spreading wedge lever (33, 38) at a distance from a spreading wedge axis (32, 39), wherein the spreading wedge lever (33, 38) is pivotably supported about the spreading wedge axis (32, 39) and can be pivotably driven by the actuating lever or the actuating lever arrangement (3, 27) from a non-separating position into a separating position.

9. The adjusting apparatus according to claim 7, characterized in that the neutral drive has a reversing lever (7) which is mounted so as to be pivotable about a reversing lever axis (8) and which is driven so as to be movable by an axial movement of the adjusting shaft (1) from the normal position into the neutral position, wherein the reversing lever (7) has an adjusting surface (11) at a distance from the reversing lever axis (8), which adjusting surface, in the normal position of the adjusting shaft (1), maintains a radial distance from a radially encircling cardiocurve (12) of a cardiocurve disk (13) which is fixedly mounted on the pointer shaft and, in the neutral position, rests under spring force on the cardiocurve (12).

10. The adjusting apparatus according to claim 9, characterized in that the actuating lever or the actuating lever arrangement (3, 27) has a distance-maintaining pin (5), by means of which a radial distance to the radially encircling cardioid curve (12) is maintained in the normal position of the reversing lever (7) by means of an adjusting surface (11) of the reversing lever.

11. Adjusting device according to claim 7, characterized in that the holding device can be operated by the adjusting shaft (1) when the adjusting shaft is moved from the normal position into the zero position in order to stop the clockwork drive of the timepiece.

12. Adjusting device according to claim 11, characterized in that the holding device can be actuated by the actuating lever or by the actuating lever device (3, 27).