CH711586A2

CH711586A2 - Percussion mechanism.

Info

Publication number: CH711586A2
Application number: CH01107/16A
Authority: CH
Inventors: Schlencker Christoph; Wenzel Jan; Kuhnert Thomas
Original assignee: Lange Uhren Gmbh
Priority date: 2015-09-28
Filing date: 2016-08-29
Publication date: 2017-03-31
Also published as: CN106896703A; DE102015116416B3; CN106896703B; CH711586B1; JP6357206B2; JP2017067774A

Abstract

The invention relates to an impact mechanism of a watch comprising a stop lever 1 which is pivotally mounted at its one end about a pivot axis and which has, on its other end remote from the pivot axis, a stop hammer 2 through which a resilient sound-generating element can be abutted. The stop lever 1 can be driven so as to be able to be pivoted counter to a spring force from a basic position closer to the sound generating element into a tensioning position which is distant from the sound generating element and can then be swiveled from the tensioning position via the basic position into a stop position in which the stop hammer 2 abuts the toning element ,

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to an impact mechanism of a watch, comprising a stop lever which is pivotally mounted at its one end about a pivot axis and which has at its other end remote from the pivot axis a stop hammer through which a resilient, Wherein the stop lever can be driven so as to be pivotable against a spring force from a basic position closer to the sound generating element into a tensioning position which is more remote from the sound generating element and can then be swiveled from the tensioning position via the basic position into a stop position in which the stop hammer is attached to the sound generating element strikes.

[0002] In such impact mechanisms, there is the problem that, after an abutment of the stop hammer on the elastic sound-generating element, in particular on a sound spring, the stop hammer is rebounded by the elasticity of the sound-generating element and is again accelerated against the sound-generating element. This leads to an unwanted further attacks on the sound-producing element, as a result of which the sound of the first striking is dampened and rendered unclean. In order to avoid this problem, it is known to apply the stop lever from a spring element from the stop position into the basic position, which with its spring force prevents further stops. However, this requires an increased force with which the stop lever has to be acted upon for abutting the stop hammer on the toning element, Since the force of the spring element must also be overcome. This leads to an increase in the required installation space and adversely affects the abutment of the stop hammer on the generating element by braking the stop lever.

SUMMARY OF THE INVENTION It is therefore an object of the invention to provide a percussion mechanism of the type mentioned at the outset which is simple in design, has a small overall size and avoids such an unwanted further abutment of the stop hammer.

This object is achieved according to the invention by the fact that the stop lever can be locked in a positively locking manner into the stop position by a blocking device in the blocking position during a backward pivoting movement from the stop position into a blocking position of the stop hammer spaced apart from the sound generating element.

[0005] By means of this design, an acceleration of the stop hammer up to its stops on the toner generating element takes place without a braking in the last part of the stop stroke. The spring force acting on the stop lever can thus be designed to be smaller, which leads to a smaller overall size.

[0006] The stop lever, which is deflected back after an abutment by the elastic sound-generating element, is reliably prevented from further unwanted stops of the stop hammer on the sound-generating element by the positive-locking blocking of the stop lever in the blocking position. This does not lead to a negative influence on the sound of the first striking, so that this sound remains brilliantly brilliant.

[0007] In a space-saving manner, the sound-generating element can be a sound spring.

[0008] To a simple construction, it results when the blocking position of the stop lever corresponds to the basic position of the stop lever.

[0009] In order to block the stop lever in the blocking position, the stop lever can have a first detent element in which the stop lever can be blocked in the blocking position against a movability into the abutment position by a second detent element.

[0010] In this case, an engagement of the first latching element by the second latching element occurs automatically when the second latching element is subjected to a spring force in the latching direction on the first latching element.

The second detent element can be moved out of engagement by the first detent element by the abutment lever during its movement into the detent position in order to enable a further desired abutment of the abutment hammer against the toning element.

In this case, the second detent element can be locked in its outward engagement position by the first detent element by means of a locking element, this detent being detachable from the abutment lever located in the abutment position.

In a simple embodiment, the stop lever can have a locking disk fixedly arranged in the region of its pivot axis and having a circular contour which surrounds the pivot axis in an arc-like manner and which terminates at a latching contour which is directed radially towards the pivot axis and which forms the first latching element with a second latching element The second detent element slides along the circular contour of the blocking disc from the abutment position during the backward pivoting movement of the abutment lever, and engages behind the first detent element when the blocking position is reached.

[0014] The circular contour of the blocking disk extends concentrically to the pivot axis of the stop lever.

The locking lever can have a locking projection which can be gripped behind by the locking element and can be locked in the outward engagement position of the second detent element by the first detent element, wherein the arresting element can be brought out of engagement with the detent projection in the abutment position of the abutment lever.

In order to reduce the components, the blocking disk can have a nose projecting radially over the circular contour, by means of which a locking lever which has the arresting element can be pivoted counter to a spring force, whereby the arresting element can be brought out of engagement with the arresting projection.

The stop lever can have a driver pin extending parallel to its pivot axis, by which the latching lever can be pivoted counter to a spring force when the stop lever is moved into the tensioning position, and the second latching element can be moved out of engagement with the first latching element.

In this case, the driving pin can be actuated by a lever arm of a creator which can be pivoted about an axis parallel to the pivot axis of the stop lever, and the stop lever can be moved from its basic position into its tensioning position, the driver pin fulfills the double function of pivoting the latching lever as well as the stop lever in FIG Its clamping position.

[0019] An exemplary embodiment of the invention is shown in the drawing and is described in more detail below. Show it

1 is a plan view of a percussion mechanism with a stop lever in the basic position

FIG. 2 is a plan view of the percussion mechanism according to FIG. 1 with the stop lever in the tensioning position. FIG. 3 is an enlarged view of the section "X" from FIG

FIG. 4 is a plan view of the percussion mechanism according to FIG. 1 with the stop lever in the stop position. FIG. 5 is an enlarged view of the section "Y" from FIG

FIG. 6 is a side view of an assembly of driving pin, hammer shaft and blocking disk of the percussion mechanism according to FIG. 1

FIG. 7 is a plan view of the assembly according to FIG. 6.

The percussion mechanism shown for a repeating timer has a stop lever 1 which has a stop hammer 2 at its one end. At its other end, the stop lever 1 is connected to a plateau 4 at a point of attachment 3. The plateau 4 has a rotatably mounted hammer shaft 5, with which the plateau 4 and the stop lever 1 are pivotably mounted with the same.

A driving pin is arranged coaxially to the screw-on point 3 on the plateau 4, which pin can be driven by a creator 7 from a basic position (FIG. 1) into a clamping position (FIGS. 2 and 3). The creator 7 is rotatably drivable counterclockwise by a rake (not shown), eg of a repeating unit of the repeating clock.

In the basic position (FIG. 1), the stop hammer 2 is located at a small distance from and in the tensioning position (FIGS. 2 and 3) at a great distance from a sound spring 8 which is arranged in the pivoting plane of the stop lever 1 and stop hammer 2 Is arranged.

The creator 7, which can be pivoted about a creator axis 9 parallel to the screwing-in position 3, has a radial creping arm 10, through which the driving pin 6 can be acted upon and the pivoting movement of the creator 7 causes the stop lever 1 against the force of a hammer spring 11 not shown in FIG From the basic position into the tensioning position.

Coaxially, a blocking disk 12 is coaxially arranged on the hammer shaft 5 and has a circular contour 13 concentric with the hammer shaft 5 on a part of its circumference which opens into a radially inwardly directed latching contour forming a first latching element 14.

A latching lever 15 extends approximately tangentially to the circular contour 13, which is acted upon by a latching lever spring 16 against the blocking disc 12, which is designed in one piece with the latching lever 15.

The latching lever 15 has a latching contour, which forms a second latching element 17, which protrudes radially to the blocking disk 12 and can engage behind the first latching element 14 behind the stop element 1 in the blocking position of the stop lever 1, as a result of which the stop lever 1 can be pivoted on a pivotal movement into a stop position, Which strikes the stop hammer 2 against the sound spring 8, is prevented.

The free end of the detent lever 15 forming a detent projection 25 has a greater distance from the axis of rotation of the hemming shaft 5 from the second detent element 17 so that the second detent element 17 closes the first detent element 14 in the basic position of the abutment lever 1, Is able to snap behind.

On the movement path of the latching lever 15 from the stop position to the basic position, the second latching element 17 slides on the circular contour 13.

A locking lever 18, which is pivotally mounted at its one end about an arresting axis 19 and extends tangentially to the circular contour 13 of the blocking disc 12, extends approximately at a right angle to the latching lever 15. The free end of the locking lever 18 forms a locking element 20 which rests on the movement path of the stop lever 1 from the stop position into the basic position and in the basic position on the end face on the free end of the latching lever 15 and thereby has a small spacing of its longitudinal side 21 facing the circular contour.

During the further pivoting movement of the stop lever 1 from the basic position into its tensioning position, a nose 22 of the blocking disk 12 protruding radially over the circular contour 13 moves out of the pivoting range of the locking lever 18 and can thus not act on this locking lever 18 on its longitudinal side 21. At the same time, the latching lever 15 is simultaneously moved radially away from the entrainment pin 6 by the blocking disk 12 in such a way that the second detent element 17 is moved radially out of engagement with the first detent element 14.

In this position of the latching lever 15, the latching lever 15 is pivoted out so far that the arresting element 20 of the arresting lever 18 no longer rests against the end face 24 of the free end of the latching lever 15 and the arresting lever 18 engages under the force of a locking spring 23, Circular contour 13 of the blocking disc 12 (FIG. 2).

In this case, the locking element 20 of the locking lever 18 pivots in front of the side of the locking end 15 of the locking lever 15, which faces the blocking disc 12, and thus blocks the latter from the circular contour 13 and the second locking element 17 out of engagement with the first The second detent element 17 is prevented from moving into a position engaging behind the first detent element 14 (FIG. 3) during the pivoting movement of the stop lever 1 from the tensioning position into the abutment position.

As a result, the pivoting movement of the stop lever 1 into its stop position and thus a stop of the stop hammer 2 on the sound spring 8 can be effected freely and unhindered.

When the locking position is reached, the lug 22 of the blocking disc 12 loads the arresting lever 18 in such a way that it lifts off from the circular contour of the blocking disc 12 and at the same time arrives from the region of the free end of the locking lever 15 forming the arresting projection 25, The second locking element 17 comes into abutment against the circular contour 13 and the locking lever 18 with the locking element 20 faces the end face of the free end of the latching lever 15 forming the locking projection 25 (FIG.

As a result of the elasticity of the sound spring 8, the stop hammer 2 and thus the stop lever 1 are now deflected back into the basic position, whereby the second catch element 17 reaches into the region of the first catch element 14 and engages behind it (FIG.

Thus, the latching lever 15 can not pivot back into the stop position and lead to a further, then unintended, stop of the stop hammer 2 on the sound spring 8.

Reference list 1 stop lever 2 stop hammer 3 feed point 4 plateau 5 hammer shaft 6 drive pin 7 creator 8 sound spring 9 creator axis 10 creator arm 11 hammer spring 12 blocking disc 13 circular contour 14 first detent element

Claims

15 latching lever 16 latching lever spring 17 second latching element 18 locking lever 19 locking axis 20 locking element 21 longitudinal side 22 lug 23 locking spring 24 end face 25 locking projection Patent claims

1. A percussion mechanism of a watch, comprising a stop lever (1) which is pivotally mounted at its one end about a pivot axis and which has a stop hammer (2) at its other end which is remote from the pivot axis and through which a resilient, (1) can be driven so as to be pivotable against a spring force from a basic position closer to the sound generating element into a tensioning position which is distant from the sound generating element and can then be swiveled from the tensioning position via the basic position into a stop position in which the stop hammer (2) On the toner generating element, characterized in that,Characterized in that the stop lever (1) can be positively locked against a movability into the stop position in a blocking position of the stop hammer (2) spaced apart from the sound-generating element by a blocking device in the blocking position during a backward pivoting movement.

2. Impact mechanism according to claim 1, characterized in that the sound-generating element is a sound spring (8).

3. Impact mechanism according to one of the preceding claims, characterized in that the blocking position of the stop lever (1) corresponds to the basic position of the stop lever (1).

4. The impact mechanism as claimed in claim 1, characterized in that the stop lever (1) has a first detent element (14), behind which a second detent element (17) can be gripped, by means of which the stop lever (1), in the blocking position, Into the stop position.

5. Impact mechanism according to claim 4, characterized in that the second detent element (17) is acted upon by a spring force in the latching direction towards the first detent element (14).

6. Impact mechanism according to claim 4, characterized in that the second detent element (17) can be moved out of engagement with the first detent element (14) by the stop lever (1) during its movement into the tensioning position.

7. The impact mechanism as claimed in claim 6, characterized in that the second detent element (17) can be locked in its outward engagement position by the first detent element (14) by a locking element (20), this detent being detachable from the abutment lever (1).

8. The impact mechanism as claimed in claim 4, characterized in that the stop lever (1) has a locking disc (12) which is arranged fixedly in the region of its pivot axis and has a circular contour (13) which surrounds the pivot axis in an arc-like manner (15), which can be moved radially with respect to the circular contour and is spring-loaded against the circular contour, wherein the second detent element (17), during the backward pivoting movement of the stop lever (1), of the first detent element (14) From the stop position along the circular contour (13) of the blocking disk (12) and engages behind the first latching element (14) when the blocking position is reached.

9. Impact mechanism according to claim 8, characterized in that the circular contour (13) of the blocking disc (12) extends concentrically to the pivot axis of the stop lever (1).

10. The impact mechanism as claimed in claim 6, characterized in that the locking lever (15) has a locking projection (25) which can be gripped behind by the locking element (20) and, in the outward engagement position of the second detent element (17) 14), wherein the arresting element (20) can be brought out of engagement with the arresting projection (25) in the stop position of the stop lever (1) by the stop lever (1).

11. Impact mechanism according to claim 10, characterized in that the blocking disc (12) has a nose (22) which projects radially over the circular contour (13), by means of which a locking lever (18), which has the arresting element (20), can be swung counter to a spring force , Whereby the locking element (20) can be brought out of engagement with the locking projection (25).

12. The impact mechanism as claimed in claim 8, characterized in that the stop lever (1) has a driver pin (6) extending parallel to its pivot axis, by which the locking lever (15) can be pivoted counter to a spring force when the stop lever (1) moves into the tensioning position And the second detent element (17) can be moved out of engagement with the first detent element (14).

13. The impact mechanism as claimed in claim 12, characterized in that the catch pin (6) can be acted upon by a creator arm (10) of a pivot (7) which can be driven so as to be pivotable about an axis parallel to the pivot axis of the stop lever (1), and the stop lever (1) can be actuated from its basic position Into its clamping position.