DE202018106180U1 - Tonfederanordnung - Google Patents

Abstract

Tonfederanordnung with a longitudinally extending gong (1), which is fixedly disposed at its one end (2) and from this end (2) from freeragend and with a vibration exciter, by which the gong (1) can be excited to vibrate, characterized in that a clamping device is arranged at a distance from the fixed end (2) of the gong spring (1), which has a tensioning element (6) which can be driven in a movable manner along a longitudinal extension of the gong (1), wherein the motion of the clamping element (6) along the clamping path, the gong spring (1) of the tensioning element (6) from a tension-free position in a transversely deflected to its longitudinal extent movable position and at the end of the clamping path is releasable.

Description

The invention relates to a Tonfederanordnung with a longitudinally extending tone spring, which is fixedly disposed at its one end and is free-floating from this end and with a vibration exciter, by which the gong spring can be excited to vibrate.

In such a sound spring arrangement, a hammer is known as a vibration exciter, which strikes the sound spring transversely to its plane. An excitation by means of a hammer requires a large space perpendicular to the plane of the gong, because the hammer must take a piece of his stroke motion.

The hammer mechanism must continue to ensure that the hammer strikes only once on the gong and then has enough distance, so that the spring can swing freely.

The impact of the hammer on the gong caused due to the very rapid deformation of the gong briefly frequencies that differ from the desired natural frequencies of the later freely oscillating gong, so that the sound by hammer is not optimal.

For multiple shots in quick succession, it depends on chance whether the hammer hits the swinging gong while moving toward or away from the hammer. This leads to amplitude differences from the second beat. In order to avoid striking the gong on a housing or other components, the impact force of the hammer must be chosen smaller than would be possible for a single shot.

The object of the invention is to provide a Tonfederanordnung that avoids the disadvantages mentioned and with a simple structure requires a small space and has a low weight and produces a good sound.

This object is achieved in that at a distance from the fixed end of the gong a clamping device is arranged, which has a clamping element which is movable in a tensioning along the longitudinal extension of the gong spring, wherein by the movement of the clamping element along the clamping path the Tonfeder of the tensioning element from a tension-free position in a transversely deflected to its longitudinal extent movable position and is releasable at the end of the tensioning path.

Preferably, the tone spring assembly is in a watch such as. arranged a Repetieruhr.

Since the vibration excitation is done by a clamping device and not by a hammer, no space for a hammer movement is required.

In addition, the training with a clamping device is less expensive than a hammer assembly.

The distance of the clamping device may be less than the distance of the clamping device to the free end of the gong to the fixed end of the gong feather.

By this design, the deflection of the gong spring in the vicinity of the fixed end of the gong spring takes place. This leads to a good sound, because for the good sound with root and the associated harmonics not the lowest three natural vibrations of the gong can be used.

The gong spring may have an arm extending transversely to the tensioning of the gong spring, by means of which the gong spring can be moved transversely to its longitudinal extent into the deflected position via the tensioning element and can be released at the end of the tensioning path.

In a simple embodiment, the arm and / or the tensioning element for deflecting the gong spring may have a ramp extending in the longitudinal extension of the gong, on which the tensioning element and / or the arm slides along.

In this case, the clamping element or the arm can have a longitudinal extent in the longitudinal direction of the gong spring, which is shorter than the longitudinal extension of the arm or the clamping element in the longitudinal direction of the gong.

If the clamping element is rotatable about an axis of rotation which extends parallel to the tensioning path of the tone spring and rotatably drivable, this enables a simple and space-saving drive of the tension element.

In this case, the clamping element may be formed resilient plectrum-like.

As a result, during the deflection of the toning spring, vibrations from preceding tensioning processes are damped by the contact with the tensioning element.

Space saving, the gong spring can extend in a circle.

Preferably, the gong spring has a rectangular cross-section and is deflectable by the clamping element transversely to its long sides.

Due to the flat tone spring, the vibrations in the plane of the gong are largely prevented. This eliminates a complicated balance of vibration frequencies in different levels to achieve a good sound of the gong.

The flat gong can be easily machined by eroding a spring steel sheet. It is in contrast to gongs with round cross section after bending no subsequent hardening required. The eroded tone spring is tuned by a form determined in a FEM simulation without further reworking. Thereby more than one harmonic can be generated. By the shape of the gong, e.g. five successive harmonics are achieved, resulting in a very pure, comparable to a musical instrument sound.

For this purpose, an increase in material and / or a reduction in material may be present at one or more points in each case the greatest deflection and / or in each case the smallest deflection of the vibrating gong.

An embodiment of the invention is illustrated in the drawing and will be described in more detail below. The sole figure of the drawing shows a perspective view of a tone spring arrangement.

The intended for a clock gong 1 extends open circular and has a rectangular cross-section.

With her one fixed end 2 is the gong feather 1 attached to a fixed component of the clock, not shown, from where it extends to its other end free-floating.

In several places the greatest or least deflection of the tonal spring excited to vibrate 1 has these bulges directed radially outward 3 . 3 ' and 3 ' that form material enlargements.

At a distance to the fixed end 2 the gong spring, near this fixed end 2 , Radial inside the circular gong is a circular disc 4 arranged around a rotation axis 5 by a clock mechanism, not shown, of the clock is rotatably driven in a clockwise direction. In this case, the axis of rotation extends 5 perpendicular to the plane of the large sides of the rectangular gong 1 ,

On the disc 4 is a plectrum-like tensioning element 6 arranged as a ramp 7 is formed, in the longitudinal extension of the gong 1 from the plane of the disc parallel to the plane of the large side of the rectangular gong 4 increases counterclockwise.

In the area of the disc 4 shows the gong feather 1 a radially inwardly projecting arm 8th on. When passing the tensioning element 5 on the arm 8th the arm slides 8th like that on the ramp 7 of the clamping element 6 that through the arm 8th the gong spring 1 from its tension-free position in a transversely to the longitudinal extension of the gong 1 deflected, tensioned position is moved.

Reaching the arm 8th the free end of the ramp 7 falls the cocked gong 1 from the tensioning element 6 and comes to a free swing. This produces the gong feather 1 a sound.

Comes by further turning the disc 4 the clamping element 6 with his ramp 7 again to the plant on the arm 8th and is the gong spring 1 still swinging, so these vibrations by the plectrum-like and thus slightly resilient clamping element 6 gently dampened before another tensioning of the gong spring 1 he follows.

LIST OF REFERENCE NUMBERS

1

gong

2

fixed end

3

bulge

3 '

bulge

3 '

bulge

4

disc

5

axis of rotation

6

clamping element

7

ramp

8th

poor

Claims (10)

Tonfederanordnung with a longitudinally extending gong (1), which is fixedly disposed at its one end (2) and from this end (2) from freeragend and with a vibration exciter, by which the gong (1) can be excited to vibrate, characterized in that a clamping device is arranged at a distance from the fixed end (2) of the gong spring (1), which has a tensioning element (6) which can be driven in a movable manner along a longitudinal extension of the gong (1), wherein the motion of the clamping element (6) along the clamping path the Tongue (1) of the clamping element (6) from a tension-free position in a transversely deflected to its longitudinal extent movable position and at the end of the clamping path is releasable. Tonfederanordnung after Claim 1 , characterized in that the distance of the clamping device to the fixed end (2) of the gong (1) is less than the distance of the clamping device to the free end of the gong (1). Tone spring arrangement according to one of the preceding claims, characterized in that the gong spring (1) has an arm (8) projecting transversely to the tensioning path of the gong (1), through which the tensioning element (6) transposes the gong spring (1) transversely to its longitudinal extent into the deflected position movable and at the end of the clamping path is releasable. Tonfederanordnung after Claim 3 , characterized in that the arm and / or the tensioning element (6) has a longitudinal extent of the gong (1) extending ramp (7) on which the clamping element and / or the arm (8) slides along. Tonfederanordnung after Claim 4 , characterized in that the clamping element (6) or the arm has a longitudinal extent in the longitudinal direction of the gong (1), which is shorter than the longitudinal extension of the arm (8) or the clamping element in the longitudinal direction of the gong (1). Tone-spring arrangement according to one of the preceding claims, characterized in that the tensioning element (6) is rotatable about a rotational axis (5) which can be driven rotatably and parallel to the tensioning path of the gong (1). Tonfederanordnung after Claim 6 , characterized in that the clamping element (6) is formed resiliently plectrum-like. Tone spring arrangement according to one of the preceding claims, characterized in that the gong spring (1) extends in a circle. Tone-spring arrangement according to one of the preceding claims, characterized in that the gong (1) has a rectangular cross section and can be deflected by the tensioning element (6) transversely to the plane of its long sides. Tone-spring arrangement according to one of the preceding claims, characterized in that there is an increase in material and / or a reduction in material at one or more points in each case the greatest deflection and / or in each case the smallest deflection of the oscillating gong (1).

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