EP1918791B1 - Regulator-free oscillation system for a clock - Google Patents

Description

The Ereindung refers to a rejoinderable oscillating system for a clock, with a coil spring whose inner Ansteckpunkt is connected in particular by means of a spiral roller with a balance shaft and whose external Ansteckpunkt is connected to a holding element, in particular with a spiral studs.

A clock vibration system is isochronous if it has the same duration of oscillation at each amplitude. Amplitude is the amplitude of the balance. The amplitude varies depending on the state of the elevator and, among other things, the friction conditions in the watch. For example, The friction of the balance in the flat positions is different than in the hanging positions. Thus, the clock usually has a higher amplitude in the flat position than in the hanging positions.

One way to eliminate the isochronism error is to use a reverse ( DE 20 27 284 A1 ). Depending on the distance between the back pins, vibrations can be accelerated or decelerated at low amplitudes. So the clock must but without back at low amplitudes go much faster than at large amplitudes. This condition can be reached by appropriate selection of the Ansteckpunkte.

The use of a Rückers is expensive. In addition, the Rücker can cause additional isochronism errors. Furthermore, back pins can wear out and thus adversely affect the long-term behavior of the clock.

Another way to minimize the isochronism error is in a replayless oscillating system ( CH 375297 ) solved by a mass erosion or an increase in mass of the balance.

The object of the invention is therefore to provide a vibration system of the type mentioned, by which the isochronism error can be reduced in a simple manner.

This object is achieved in that the holding element adjacent end portion of the coil spring is arranged in a right angle to the balance shaft level to be positioned.

In this case, the end region can be adjusted radially to the balance shaft or pivotable about an axis parallel to the balance shaft.

By this design, a precisely adjustable decentralization of the coil spring can be made, whereby the isochronism error is at least considerably reduced, if not completely eliminated.

The inventive construction, it is possible to completely dispense with a Rücker.

Thus, no new, caused by a backer isochronism error can occur.

An embodiment of the invention is that the outer Ansteckpunkt the coil spring is attached to the support member, in particular on the spiral studs, wherein the support member is radially adjustable to the balance shaft and / or to the axis parallel to the balance shaft pivotally adjustable.

In a further embodiment of the invention, the outer Ansteckpunkt the coil spring on the retaining element, in particular on the spiral stud radially to the balance shaft and / or about the axis parallel to the balance shaft pivotally adjustable and can be locked.

Another training option of the invention is that the outer end of the coil spring is attached to the holding element, in particular on the spiral stud, wherein the holding element adjacent to the end region of the spiral spring at a distance from the holding element on a Almost transversely to the longitudinal extent of the coil spring adjustable actuator is permanently in contact.

In order to exert a bias on the coil spring, it is possible that the holding element adjacent end portion of the coil spring is bent radially outwardly at a shallow angle or that the outer end of the coil spring to produce a bias in the right angle to the balance shaft level on the holding element adjacent End region of the coil spring is attached to the holding element.

The parallel to the balance shaft axis about which the outer end of the coil spring is adjustably adjustable pivotally, may extend through the spiral stud, in particular centrally through the spiral studs.

But it is also possible that the axis parallel to the balance shaft extends at a distance from the spiral stud.

To support the spiral stud, the spiral stud can be arranged on a fixed spiral stud carrier.

For adjustability of the end region of the spiral spring, the spiral stud can be arranged on a spiral stud carrier, which is pivotally adjustable about the axis parallel to the balance shaft.

For further adjustability, the radially bent outer end of the spiral spring can be displaceable in a radial guide of the fixed holding element as well as in its desired position on the holding element.

The outer end of the coil spring may be bent outwards in the plane perpendicular to the balance shaft.

In this case, in the plane perpendicular to the balance shaft level bent outer end of the coil spring in a radial guide of the fixed support member can be displaced and locked in its desired position on the support member.

Another possibility is that the outer end of the coil spring extends approximately tangentially to the balance shaft, wherein the outer end of the coil spring may be provided with a Breguet end curve.

The radially bent or approximately tangentially extending outer end of the coil spring can be displaced in a radial guide and lockable in a desired position.

The inventive radial adjustability and / or pivoting of the outer end of the coil spring is advantageously applicable to coil springs with a variety of cross-sections.

Thus, the coil spring may have a rectangular cross section or even a circular cross section. However, it can also have any other cross-section, in particular a cross section approximated to a rectangular or circular cross-section.

Figur 1

eine Draufsicht auf eine spannungsfreie Spiralfeder

Figur 2

eine Draufsicht auf ein erstes Ausführungsbeispiel einer Spiralfeder welche durch Verschiebung des äußeren Ansteckpunktes der Spiralfeder zur Unruhwelle hin dezentralisiert ist

Figur 3

eine Draufsicht auf die Spiralfeder nach Figur 2 welche durch Verschiebung des äußeren Ansteckpunktes der Spiralfeder von der Unruhwelle weg dezentralisiert ist

Figur 4

eine Draufsicht auf ein zweites Ausführungsbeispiel einer Spiralfeder welche durch rotatorische Verstellung des äußeren Ansteckpunktes der Spiralfeder zur Unruhwelle hin dezentralisiert ist

Figur 5

eine Draufsicht auf die Spiralfeder nach Figur 4 welche durch rotatorische Verstellung des äußeren Ansteckpunktes der Spiralfeder von der Unruhwelle weg dezentralisiert ist

Figur 6

eine Draufsicht auf ein drittes Ausführungsbeispiels einer Spiralfeder welche durch sowohl Verschiebung als auch rotatorische Verstellung des äußeren Ansteckpunktes der Spiralfeder zur Unruhwelle dezentralisierbar ist

Figur 7

eine Draufsicht ein viertes Ausführungsbeispiel einer Spiralfeder mit nicht vorgespanntem Endbereich

Figur 8

Eine Draufsicht auf die Spiralfeder nach Figur 7 in einer Zentrallage

Figur 9

Eine Draufsicht auf die Spiralfeder nach Figur 7 in einer Extremdezentralisierungslage

Figur 10

Eine Draufsicht auf die Spiralfeder nach Figur 7 in einer zweiten Extremdezentralisierungslage

Figur 11

Eine Draufsicht auf den Verstellbereich des Endbereichs der Spiralfeder nach Figur 7.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below. Show it

FIG. 1

a plan view of a tension-free coil spring

FIG. 2

a plan view of a first embodiment of a coil spring which is decentralized by shifting the outer Ansteckpunktes of the coil spring to the balance shaft out

FIG. 3

a plan view of the coil spring after FIG. 2 which is decentralized by displacement of the outer Ansteckpunktes the coil spring away from the balance shaft

FIG. 4

a plan view of a second embodiment of a coil spring which is decentralized by rotational adjustment of the outer Ansteckpunktes the coil spring to the balance shaft out

FIG. 5

a plan view of the coil spring after FIG. 4 which is decentralized by rotational adjustment of the outer Ansteckpunktes the coil spring away from the balance shaft

FIG. 6

a plan view of a third embodiment of a coil spring which is decentralized by both displacement and rotational adjustment of the outer Ansteckpunktes the coil spring to the balance shaft

FIG. 7

a plan view of a fourth embodiment of a coil spring with non-biased end portion

FIG. 8

A top view of the coil spring after FIG. 7 in a central location

FIG. 9

A top view of the coil spring after FIG. 7 in an extreme decentralization situation

FIG. 10

A top view of the coil spring after FIG. 7 in a second extreme decentralization situation

FIG. 11

A plan view of the adjustment of the end portion of the coil spring after FIG. 7 ,

The spiral springs 1, 1 ', 1 ", 1"' shown in the figures of a balance for a clock are fixed with their inner Ansteckpunkt 4 on a spiral roll which is arranged concentrically fixed on a balance shaft, not shown.

Balance wheel and spiral roller 2 are rotatably mounted about a rotation axis 3.

The radially outer ends 5 of the coil springs 1, 1 ', 1 ", 1"' are bent outwardly in the plane perpendicular to the balance shaft and attached to a spiral stud 6 and have an external Ansteckpunkt 14 on.

In FIG. 1 showing a coil spring 1 according to the prior art, the spiral stud 6 is fixedly arranged on a Spiralklötzchenträger not shown. The coil spring 1 is located in a centralized to the axis of rotation 3 of the balance shaft position.

In FIG. 2 is the spiral stud 6 radially slidably disposed in a fixed to a Spiralklötzchenträger not shown radial guide 7 and with it the outer end of the coil spring 1 'radially inwardly displaced and locked in this position, that the coil spring 1' to the axis of rotation 3 of the balance shaft out is decentralized.

FIG. 3 shows the same arrangement as FIG. 2 ,

But this is the spiral stud 6 in the radial guide 7 and with it the outer end of the coil spring 1 'so radially outwardly displaced and locked in this position that the coil spring 1' is decentralized away from the axis of rotation 3 of the balance shaft.

In the embodiment of the FIGS. 4 and 5 the spiral stud 6 is fixedly arranged on a Spiralklötzchenträger not shown but about its axis of rotation 3 parallel to the balance shaft central axis 8 rotatably adjustable and locked in the set rotational position.

In FIG. 4 is the spiral stud 6 is rotated clockwise about the axis 8 and locked so that the coil spring 1 "to the rotation axis 3 of the balance shaft is rotated and thus the coil spring 1" is decentralized with respect to the balance shaft.

FIG. 5 shows the same arrangement as FIG. 4 ,

In this case, the spiral stud 6 is rotated counterclockwise about the axis 8 and locked so that the outer end 5 of the coil spring 1 "of the rotation axis 3 of the balance shaft is rotated away and thus the coil spring 1" is decentralized with respect to the balance shaft.

In FIG. 6 is symbolically represented by two arrows 9, that the spiral stud 6 and with him the outer end 5 of the coil spring 1 "'on an imaginary circular path, the pivot axis is located away from the axis of rotation 3 of the balance shaft, is moved to the spiral studs 6 with a Spiralklötzchenträger not shown, which is pivoted about an axis parallel to the axis of rotation 3 axis.

Depending on whether the pivot axis is far away or arranged near the spiral stud 6, more translational or more rotational movement of the spiral stud 6 is generated.

In the FIGS. 7 to 11 the outer end 5 of the coil spring 1 "" is attached to the stationary spiral stud 6. The spiral stud has a pad arm 11 extending in the direction of the end portion 10 of the spiral spring 1 "" which extends in the direction of the spiral stud 6 and has a continuous threaded bore extending approximately transversely to the longitudinal extent of the end portion 10 of the spiral spring 1 "".

In the threaded bore an adjusting screw 12 is screwed, which has a screw head 13 for rotating the adjusting screw 12 at its end remote from the end 10 end.

With the front side of the screw head 13 opposite end of the adjusting screw 12 at one of the outer Ansteckpunkt 14 at the end portion 10 of the coil spring 1 "" in Appendix.

As in particular in FIG. 11 can be seen by adjusting the screw 12, the outer Ansteckpunkt the coil spring 1 "" more or less distracted. By the respective deflection angle β and the curve can be influenced.

The coil spring 1 "" is bent at the beginning of its end portion 10 by a shallow angle to the outside and firmly clamped to the outer end 5 in the spiral studs 6, that the end portion 10 is always with bias on the screw 12 in abutment.

When mounting the adjusting screw 12 accordingly FIG. 7 brought into a largely not protruding from the Klötzchenarm 11 outstanding position and does not affect the coil spring 1 "".

Since the balance shaft is fixed in position, the coil spring 1 "" is heavily distorted.

After that will be appropriate FIG. 8 the adjusting screw 12 used to bring the coil spring 1 "" in a central position with respect to the balance shaft.

The Figures 9 and 10 show the two extreme centralization, in which the coil spring 1 "" can be brought, so that an isochronism error is reduced.

The self-bias of the coil spring 1 "" must be so large that the end portion 10, even with a small deflection of the coil spring 1 "" accordingly FIG. 9 even with a "breathing" of the coil spring 1 "" can not lift off the screw 12.

This would otherwise result in an extension of the oscillating coil spring length and affect the gait.

LIST OF REFERENCE NUMBERS

1

spiral spring

1'

spiral spring

1"

spiral spring

1"'

spiral spring

1""

spiral spring

2

collet

3

axis of rotation

4

inner point of infection

5

outer end

6

stud

7

radial guide

8th

axis

9

arrows

10

end

11

Klötzchenarm

12

screw

13

screw head

14

external point of infection

Claims (20)

1. Index-free vibration system for a watch, having a balance spring, the inner fastening point of which is connected to a balance staff by means of a collet, and the outer fastening point of which is connected to a retaining element, in particular by means of a balance spring stud, characterized in that the end region (10) of the balance spring (1', 1'', 1''', 1'''') which is adjacent to the retaining element is arranged in a plane at right angles to the balance staff, in order to be positioned so as to be set.
2. Vibration system according to Claim 1, characterized in that the end region (10) can be set in an adjustable manner radially to the balance staff.
3. Vibration system according to one of the preceding Claims, characterized in that the end region (10) can be set enabling it to be pivoted about an axis (8) parallel to the balance staff.
4. Vibration system according to one of the preceding Claims, characterized in that the outer fastening point (14) of the balance spring (1', 1'', 1''') is attached to the retaining element, in particular to the balance spring stud (6), the retaining element being capable of being set radially in relation to the balance staff and/or being capable of adjustment by causing it to pivot about the axis (8) parallel to the balance staff.
5. Vibration system according to one of Claims 1 to 3, characterized in that the outer fastening point (14) of the balance spring (1', 1'', 1''') to the retaining element, in particular to the balance spring stud (6), can be arranged and held in place radially in relation to the balance staff, and/or can be capable of adjustment by being caused to pivot about the axis (8) parallel to the balance staff.
6. Vibration system according to one of Claims 1 to 3, characterized in that the outer fastening point (14) of the balance spring (1', 1'', 1''') is attached to the retaining element, in particular to the balance spring stud (6), the end region (10) of the balance spring (1'''') adjacent to the retaining element being permanently in bearing contact at a distance from the retaining element with a positioning element that is capable of being adjusted approximately transversely in relation to the longitudinal extent of the balance spring (1'''').
7. Vibration system according to Claim 5, characterized in that the end region (10) of the balance spring (1'''') adjacent to the retaining element is bent radially outwards through a flat angle.
8. Vibration system according to Claim 5, characterized in that the outer end (5) of the balance spring (1'''') is attached to the retaining element under the generation of a tension in the plane perpendicular to the balance staff on the end region (10) of the balance spring (1'''') adjacent to the retaining element.
9. Vibration system according to one of Claims 3 to 5, characterized in that the axis (8) parallel to the balance staff extends through the balance spring stud (6).
10. Vibration system according to one of Claims 3 to 5, characterized in that the axis parallel to the balance staff extends at a distance to the balance spring stud.
11. Vibration system according to one of the preceding Claims, characterized in that the balance spring stud is arranged on a fixed balance spring stud carrier.
12. Vibration system according to Claim 3, characterized in that the balance spring stud is arranged on a balance spring stud carrier, which is capable of being set by causing it to pivot about the axis parallel to the balance staff.
13. Vibration system according to Claim 12, characterized in that the balance spring stud is so arranged on the balance spring stud carrier that it is capable of being set by causing it to rotate about a further axis parallel to the balance staff.
14. Vibration system according to one of the preceding Claims, characterized in that the outer end (5) of the balance spring (1', 1'', 1''') is bent outwards in the plane perpendicular to the balance staff.
15. Vibration system according to Claims 5 and 14, characterized in that the outer end of the balance spring that is bent outwards in the plane perpendicular to the balance staff can be displaced in a radial guide of the fixed retaining element and can be held in place in its predetermined position on the retaining element.
16. Vibration system according to one of Claims 1 to 13, characterized in that the outer end of the balance spring extends more or less tangentially to the balance staff.
17. Vibration system according to Claim 16, characterized in that the outer end of the balance spring is provided with a Breguet terminal curve.
18. Vibration system according to Claim 4, characterized in that the radially bent or tangentially extending outer end (5) of the balance spring (1', 1''') is arranged fixed to the retaining element, and in that the retaining element is capable of displacement in a fixed radial guide (7) and of being held in place in a predetermined position.
19. Vibration system according to one of the preceding Claims, characterized in that the balance spring possesses a rectangular cross section.
20. Vibration system according to one of Claims 1 to 18, characterized in that the balance spring possesses a circular cross section.

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