JPS6241355Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a damper mechanism for a piano that brings a damper into contact with strings by biasing a spring.

In the conventional piano damper mechanism, as shown in FIG. 1, a lead weight 26 is embedded in the damper lever 25 to generate a falling load on the damper 5, and the damper 5 is brought into contact with the strings 4. .

However, since the weights 26 have several stages from the treble part to the bass part, it is difficult to manufacture these weights 26 and to
6 in the damper lever 25 in appropriate combinations, it is very time-consuming, and this reduces the work efficiency of the piano damper mechanism and, ultimately, the piano, and increases the manufacturing cost. I had it.

The purpose of the present invention is to provide a damper mechanism that can be manufactured at low cost and with high work efficiency in order to eliminate these drawbacks.The purpose of this invention is to provide a damper mechanism that can be manufactured efficiently at low cost. A leaf spring protruding from the piano body, a string disposed above these keys and the leaf spring, a damper straddled over the string so as to be able to come into contact with and leave the piano body, and a damper guide installed on the piano body. and a damper wire supported in the vertical direction by the damper guide, a push-up button is provided protruding from the tip of the key, and the damper guide is movable in the vertical direction; The upper end of the damper wire is fixed to the damper, and the lower end of the damper wire is fixed to the tip of the leaf spring, and the leaf spring biases the damper wire downward to bring the damper into contact with the string. The piano damper mechanism is further characterized in that the damper wire moves upward against the leaf spring by being pushed up by the button based on the rocking of the key.

Hereinafter, embodiments of this invention will be described based on FIGS. 2 to 5.

1 in the figure is the damper mechanism body of the piano, and this damper mechanism body 1 includes a damper part 2 and a keyboard part 3.
It is composed of.

A string 4 is stretched on the upper part of the damper part 2, and a damper 5 is provided on the string 4 so as to be freely accessible and detachable via a damper felt 6 stuck to the lower surface of the damper 5. Further, a bent upper end of a damper wire 7 is fitted onto one side of the damper 5. Further, the damper wire 7 passes through a guide pusher 8' that is fitted into a through hole formed in the damper guide 8, and the other end is fitted into a fitting hole 10 formed in the upper surface of the damper block 9. , are screwed together with bolts 11. The damper block 9 also has a damper spring pivot groove 12 in its lower part, and a locking shaft 13 is pivoted in the horizontal direction within the damper spring pivot groove 12. A cylindrical portion 15 of a damper spring 14, which is a plate spring whose tip is bent into a cylindrical shape, is crimped onto this locking shaft 13, and urges the damper block 9 downward. Also, damper spring 14
The other end is screwed onto the piano body 16 with a bolt 17.

Next, the keyboard section 3 will be explained.

The keyboard section 3 is provided with a keyboard 18, and a back check support 19 is erected on the upper surface of the tip of the keyboard 18. A bag check 20 is fixed to the upper end of the bag check support 19. Further, the lower end of a support wire 21 having a substantially uniform cross section and a lower end bent rearward is fixed to the distal end surface of the keyboard 18.
The upper end portion is fitted to the lower surface of a push-up button 22 that pushes up the damper block 9 from below against the damper spring 14 when the keyboard 18 is struck. Here, the support wire 21 has a substantially square cross section and its lower end is bent backwards, so unlike conventional damper mechanisms, the push-up button 22 can be positioned almost directly below the damper block 9. To enable anyone to easily and efficiently perform damper adjustment work without requiring difficult bending adjustment of a damper wire based on the intuition of a highly skilled person.

Note that 24 in the figure is a damper spring support tube, which is fixed to the piano body 16 via a support piece 25.

The piano damper mechanism according to this invention uses a downwardly biased leaf spring as a means of moving the damper wire downward and bringing the damper into contact with the strings, which is necessary in the manufacture of damper mechanisms. As a result, the weight of the damper lever is not required, and the process of manufacturing such a weight and the process of embedding an appropriate weight in each damper lever are unnecessary, and therefore, the manufacturing of the damper mechanism is facilitated.

In addition, in the piano damper mechanism according to this invention, since the lower end of the damper wire is supported by a leaf spring, the damper lever that was previously required is no longer necessary, and the number of parts in the damper mechanism is reduced. As a result, manufacturing of the damper mechanism and, by extension, the manufacturing of the piano can be simplified and costs can be reduced.

Further, since the leaf spring can be manufactured in advance according to the purpose, the efficiency of manufacturing the damper mechanism can be improved.

Thus, the practical value of this idea is enormous.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway vertical cross-sectional view of a conventional piano damper mechanism, Fig. 2 is a perspective view of an embodiment of the present invention, Fig. 3 is an enlarged perspective view of the same part, and Fig. 4 is a partially cutaway side view of the same part. 5 is a sectional view taken along the line A--A in FIG. 4. 1... Piano damper mechanism, 4... Strings, 5...
...damper, 7 ... damper wire, 8 ... damper guide, 14 ... damper spring (plate spring), 16 ... piano body, 18 ... keyboard (key),
22...Push up button.

Claims (1)

[Claims for Utility Model Registration] A key pivotably supported on a piano body, a leaf spring protruding from the piano body, a string disposed above these keys and the leaf spring, and The piano includes a damper installed so as to be able to approach and separate from the strings, a damper guide installed on the piano body, and a damper wire supported in the vertical direction by the damper guide, and a push-up button protruding from the tip of the key. and the damper guide is movable in the vertical direction, the upper end of the damper wire is fixed to the damper, and the lower end of the damper wire is fixed to the tip of the leaf spring, and The leaf spring biases the damper wire downward to bring the damper into contact with the strings, and further, the damper wire is pushed up by the button based on the swing of the key, thereby pushing against the leaf spring. A piano damper mechanism that moves upward against resistance.