Reed plate for a hand-pulled instrument, sound post for a hand-pulled instrument, as well as hand-pulled instrument

Abstract

A hand-pulled instrument, such as an accordion, typically has a sound post (or reed post) on which several reed plates are mounted. The reed plate usually has two oblong openings. Each opening relates to an elongated reed, which is widened at one of its two longitudinal ends for attachment to the reed plate. The opposite long end of the reed is not further fixed. The reed can be made to vibrate in a way that it partially swings into the associated opening. If air flows through the opening, in particular, due to a movement of a bellows of the hand-pulled instrument, such vibration can be generated, and in this way, an audible tone is produced. The reeds are usually attached to the reed plate with a rivet.

Claims

1. A reed plate for a hand-pulled instrument, wherein at least one reed is fixed to the reed plate and wherein the reed plate and the reed respectively comprise a carbon fiber composite material.

2. The reed plate according to claim 1, comprising: a planar support area extending in a plane for connection to the reed, and an opening to allow a vibration of the reed, wherein the opening extends from the support area along a longitudinal axis up to an edge area of the opening opposite to the support area, wherein the reed plate is shaped in such a way that a distance is formed between the plane and the edge area in a direction perpendicular to the plane.

3. The reed plate according to claim 2, wherein the distance is at most 1.5 mm.

4. The reed plate according to claim 2, wherein the distance is at least 0.05 mm.

5. The reed plate according to claim 2, wherein a surface of the reed plate facing to the reed comprises a recess and/or a curvature and/or an inclination to form the distance.

6. The reed plate according to claim 2, wherein the reed comprises a first region and a second region, wherein the first region of the reed is screwed to the reed plate and the second region extends parallel to the longitudinal axis.

7. The reed plate according to claim 6, wherein the first region of the reed is screwed to the reed plate in such a way that the first area of the reed contacts the support area of the reed plate in a planar manner.

8. The reed plate according to claim 7, wherein the first region of the reed has a width measured transverse to the longitudinal axis and the first region of reed is pressed against the reed plate over at least 50% of the width.

9. The reed plate according to claim 1, wherein the reed plate and the reed are made from the same material.

10. The reed plate according to claim 1, wherein at least two reeds are attached to the reed plate.

11. A sound post for a hand-pulled instrument, wherein several reed plates according to claim 1 are attached to the sound post.

12. The sound post according to claim 11, wherein the sound post comprises a carbon fiber composite material.

13. The sound post according to claim 11, wherein the sound post, the reed plates, and the reeds are made of the same material.

14. A hand-pulled instrument with several reed plates according to claim 1 and/or with a sound post according to claim 11.

Description

[0049] FIG. 1 shows a schematic perspective sketch of an inventive reed plate, with a sketch of an associated reed.

[0050] FIG. 2 shows a corresponding sketch without the reed.

[0051] FIG. 3 shows a sketch of a corresponding plan view of the reed plate.

[0052] FIG. 4 shows a sketch of a corresponding side view of the reed plate.

[0053] FIG. 5 shows a schematic representation of a sound post according to the application.

[0054] FIG. 1 shows a schematic perspective sketch of an inventive reed plate 2 for a hand-pulled instrument. The hand-pulled instrument can be, for example, an accordion. On the reed plate 2—as dotted indicated in FIG. 1—a reed 4 can be attached. The reed plate 2 preferably comprises a carbon fiber composite material. The carbon fiber composite material can, for example, be carbon. For example, the reed plate 2 is formed from the carbon fiber composite material.

[0055] The reed 4 preferably also comprises carbon fiber composite material. The carbon fiber composite material can in turn be, for example, carbon. For example, the reed 4 can be formed from the carbon fiber composite material. In particular, it can be provided that the reed plate 2 and the reed 4 consist of the same material.

[0056] FIG. 2 shows a corresponding sketch of the reed plate 2 without the reed, FIG. 3 shows a sketch of a corresponding plan view of reed plate 2. FIG. 4 shows a sketch of a corresponding side view of reed plate 2 with reed 4. Reed plate 2 has a planar support area 22 extending in a plane E for connection to the reed 4. Further, the reed plate 2 has an opening 24 to enable a vibration of the reed 4. The shape of the opening 24 is preferably adapted to the shape of the reed 4. Viewed in a section parallel to the plane E, the opening 24 has particularly a rectangular cross-section.

[0057] By an airflow through the opening 24, particularly generated by a movement of a bellows of a hand-pulled instrument equipped with the reed plate 2, the reed 4 connected to the reed plate 2 can be induced to vibrate to produce a sound. The opening 24 of the reed plate 2 preferably extends directly from the support area 22 along a longitudinal axis L up to an edge area 26 opposite to the support area 22. The edge area 26 is particularly straight and perpendicular to the longitudinal axis L.

[0058] The reed 4 is designed flat overall and extends in a plane parallel to the plane E. As can be seen from the example in FIG. 3, the reed 4 has a first region 42 and a second region 44. The second region 44 extends preferably immediately starting from the first region 42 longitudinally parallel to the longitudinal axis L to an opposite edge area 46 of the reed 4.

[0059] The first region 42 of the reed 4 can have a substantially rectangular shape and the second region 44 can also be substantially rectangular in shape. However the first region 42 is preferably broadened as measured transversely to the longitudinal axis L in comparison to the second area 44 (cf. FIGS. 1 and 3). Particularly, the first region 42, as shown in FIG. 3 shows a first width hl measured transversely to the longitudinal axis L and the second region 44 of the reed 4 shows a second width b2, measured transversely to the longitudinal axis L, which is smaller than the first width b1.

[0060] The second region 44 of the reed 4 can extend along the longitudinal axis L and further extend as the first region 42. The second region 44 has, a measured length λ along the longitudinal axis L, which particularly depends on the desired target frequency, the modulus of elasticity and the selected density.

[0061] The first region 42 of the reed 4 is connected to the reed plate 2, particularly, screwed or glued or soldered to the reed plate 2. The first region 42 is connected to the reed plate 2 in such a way that it contacts the support area 22 of the reed plate 2 over a large area. The first region 42 is advantageously pressed to the support area 22 of the reed plate 2 over at least 50%, preferably over at least 70% and more preferably over at least 90% of its width b1.

[0062] The reed plate 2 is shaped such that—as outlined in FIG. 4—a distance δ in a direction perpendicularly to the plane E is formed between the plane E and the edge region 26. This distance δ corresponds at least essentially to the so-called “release gap” so that an opening is formed between the edge area 46 of the reed 4 and the edge area 26 of the opening 24, Particularly, the size of the distance δ influences the response of the reed 4 on airflow through the opening 24, so the time between the beginning of the airflow and the formation of the audible tone.

[0063] To form the distance δ the reed plate 2 comprises a surface 28 facing the reed 4 which shows a convex curvature and/or an inclination 29. In the illustrated preferred embodiment, the surface 28 is provided with an inclination 29 which directly adjoins the planar section of the surface 28 via an edge. Alternatively, however, a curved transition area may be present or the right portion of the surface 28 may show an overall convex curvature.

[0064] The distance δ or the size of the release gap is preferably depending on the desired target frequency and the stiffness of the chosen reed 4. The distance δ is preferably at most 1.5 mm, particularly preferably at most 1.3 mm, for example, at most 1.0 mm. Furthermore, the distance δ is preferably at least 0.05 mm, particularly preferably at least 0.1 mm, for example at least 0.3 mm.

[0065] Contrary to what is sketched in the figures, the reed plate can have more than one opening. For example, a reed plate can be provided with two openings, where each opening is provided for one reed, respectively. Accordingly, the reed plate is preferably connected to two reeds, designed with the formation of reeds and their connections to the reed plate in the sense of the above description.

[0066] FIG. 5 shows a schematic representation of a sound post 6 according to the invention. The sound post 6 has several reed plates 2, 2′ according to the invention. The reed plates 2, 2′ are preferably connected to the sound post 6 with a wax 8. Furthermore, screws 10 can be seen with which the reeds 4 are attached to the reed plates 2, 2′ in a plane manner.