Mechanical device for piano

A technology for mechanical devices and pianos, applied in stringed instruments, instruments, etc., can solve the problems of increased contact weight and adverse effects on the sense of touch, and achieve the effects of improved performance, high performance performance, and rich expressiveness.

CN100555408CActive Publication Date: 2009-10-28KAWAI MUSICAL INSTR MFG CO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2009-10-28

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Abstract

A mechanical device for a piano that clarifies the timing of release with a simple structure, improves the performance of continuous strikes, and thereby realizes performance performance with high expressiveness without adversely affecting the feel of the touch keys. This mechanical device for pianos, which causes the hammers to oscillate with the strike of the keys, has the following parts: a cross bar which is pushed up and turned by the said keys; an adjustment button with a flat top bar contact surface at the lower end; and A jack that has a flat tuning button contact surface that contacts the jack contact surface when the key is struck. The ejector pin is a molded product made of thermoplastic resin containing long reinforcing fibers.
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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 bar 52 mounted on the rear end of the key 50 ; a jack 53 rotatably mounted on the bar 52 ; and an adjustment button 56 arranged at a predetermined position above the 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 55 extending upward sub...

Examples

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 ...