JPS60145488U

JPS60145488U - Actuator for automatic piano performance equipment

Info

Publication number: JPS60145488U
Application number: JP3262584U
Authority: JP
Inventors: 善樹西谷; 繁村松
Original assignee: ヤマハ株式会社
Priority date: 1984-03-07
Filing date: 1984-03-07
Publication date: 1985-09-27

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図はピアノ自動演奏装置のドライブユ互ットを構成
するアクチュエータ及びキーセンサーユニットの鍵に対
する配置関係を示す断面図、第２図は従来のアクチュエ
ータの構造例を示す断面　−図、第３図はこの考案の一
実施例を示す断面図である。１・・・・・・鍵、３・・曲キーセンサーユニット、２
１・・・・・・上部ヨーク、２１Ａ・・・・・・プラン
ジャ貫通孔、２１Ｂ・・・・・・プランジャ段部との対
向面、２２・・曲下部ヨーク、２３・・・・・・ソレノ
イドコイル、２４・・・・・・ボビン、２４Ａ・・・・
・・フランジ、２５・・・・・・プランジャ、２６・・
・・・・ばね、２７・・・・・・アクチュ仝−タ、２８
．２９・・・・・・ストッパー。Fig. 1 is a cross-sectional view showing the arrangement of the actuator and key sensor unit that constitute the drive unit of an automatic piano performance device with respect to the key, Fig. 2 is a cross-sectional view showing an example of the structure of a conventional actuator, and Fig. 3 FIG. 1 is a sectional view showing an embodiment of this invention. 1... Key, 3... Song key sensor unit, 2
1... Upper yoke, 21A... Plunger through hole, 21B... Surface facing the plunger step, 22... Curved lower yoke, 23... Solenoid coil, 24...Bobbin, 24A...
...Flange, 25...Plunger, 26...
... Spring, 27 ... Actuator, 28
．． 29... Stopper.

Claims

[Scope of utility model registration request]

A solenoid coil wound around a bobbin is arranged between an upper yoke and a lower yoke, a plunger is arranged inside the bobbin so as to be movable in the axial direction, and an actuator head is attached to the tip of the plunger, and the solenoid coil is connected to a piano. A piano that is energized based on information regarding the movement of keys on a keyboard to generate a thrust that moves the plunger upward, and that the thrust pushes up a chisel to automatically perform an action similar to pressing a key with a finger. In the actuator 1 of the automatic performance device, the lower end of the bobbin is extended to form an inward flange at the end, the inner surface is used as a plunger guide surface, and a stepped shaft-shaped plunger is slidable inside the bobbin. The automatic piano player is characterized in that the upper yoke is disposed so as to be supported on the flange via a spring, and a surface facing a plunger stepped portion having a half-punch structure is formed around the plunger penetrating portion of the upper yoke. Actuator of the device.