Mechanical device for piano

A mechanical device and piano technology, applied in the direction of stringed instruments, instruments, etc., can solve the problems of increased contact weight and adverse effects of touch keys, and achieve the effects of improved performance, high performance performance, and rich expressiveness

Active Publication Date: 2006-09-13
KAWAI MUSICAL INSTR MFG CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, since the elastic force of the spring is increased, the contact weight of the jack 53 when pushing up the hammer 60 is correspondingly increased, and as a result, the feeling of the touch key is adversely affected.

Method used

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  • Mechanical device for piano
  • Mechanical device for piano
  • Mechanical device for piano

Examples

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Embodiment Construction

[0036] Next, a mechanical device according to an embodiment of the present invention will be described with reference to the drawings. figure 2 The mechanical device 1 for an upright piano, the keyboard 2, the hammers 3, etc. according to the first embodiment of the present invention in the key-released state will be described. Keyboard 2 has a number of side-by-side arrangements from left to right (along figure 2 arranged in the depth direction) of the keys 4 (only one is shown in the figure), and each key 4 is arranged in the front and back direction (with figure 2 The right side in the middle is the front side) and the approximate center is swingably supported by a fulcrum, which is a balance pin 5a embedded in the key bottom plate 5.

[0037] Mechanical device 1 is installed on the left and right brackets (not shown in the figure) above the rear end of keyboard 2, and extends between the above-mentioned two brackets. The mechanical device 1 is also provided with a cross ...

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PUM

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Abstract

An action for a piano is provided for clarifying a timing of let-off, improving the sequential touching capabilities, and consequently realizing high playing performance excellent in expressive power in a simple structure without adversely affecting the key touch feeling. The action for a piano swings a hammer in response to a touch on a key, and comprises a wippen pushed up by the key to pivotally move, a regulating button having a flat jack contact surface on the lower end, and a jack having a flat regulating button contact surface which comes into contact with the jack contact surface as the key is depressed. The jack comprises a molding made of a thermoplastic resin containing long fibers for reinforcement.

Description

technical field [0001] This invention relates to mechanical devices for pianos that are actuated in response to depression of keys to swing hammers to strike strings. Background technique [0002] A known general mechanical device for a piano is disclosed in Japanese Unexamined Patent Publication No. 6-83326, for example. FIG. 1 shows the main components of the mechanism 51 in the key-released state. The mechanical device 51 is suitable for an upright piano, and is arranged above the rear end of the key 50 (with the left side in FIG. 1 being the rear side). The mechanical device 51 includes the following components: a cross bar 52 mounted on the rear end of the key 50 ; a push rod 53 rotatably mounted on the cross bar 52 ; and an adjustment button 56 arranged at a predetermined position above the cross bar 52 . The jack rod 53 is formed in an L-shape and includes an adjustment button contact projection 54 extending in the front-rear direction, and a hammer upper push rod 5...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10C3/16G10C3/00
Inventor 田中功介
Owner KAWAI MUSICAL INSTR MFG CO
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