Keyboard chassis and key guide structure for keyboard instrument

Abstract

A keyboard chassis capable of preventing deformation of the keyboard chassis even when the keyboard instrument is stored in an upright position, and a key guide structure capable of stably guiding a key without generating noise. The keyboard chassis is provided with a plurality of connection parts connecting between a rear support part and a front support part. Each connection part includes a plate-shaped vertical rib continuous with the rear support part and the front support part, and a plate-shaped reinforcement rib disposed on an upper end of the vertical rib, with a width increased in the left-right direction. The key guide structure includes key guide holders each having a mounting portion, and key guide bodies each mounted in the mounting portions in a state inserted from above, for being brought into sliding contact with inner side surfaces of a guide recess of each key.

Description

technical field [0001] The present invention relates to a keyboard chassis for a keyboard musical instrument, which is applied to a keyboard musical instrument, such as an electronic piano, and is configured to support a plurality of keys and hammers in a left-right direction arrangement, and more particularly to a keyboard chassis made of synthetic resin. A keyboard chassis structure formed of the finished molded product, and a key guide structure for guiding a key that is pivotally moved by key depression. Background technique [0002] In the prior art, the inventors of the present invention have proposed a keyboard chassis for an electronic piano in Japanese Patent Laid-Open No. 2005-70644 (Kokai). A keyboard device of an electronic piano with a keyboard chassis includes a plurality of keys extending in a front-rear direction and a plurality of hammers provided for the respective keys, and a keyboard chassis that pivotally supports the keys and hammers. The keyboard chas...

AI Technical Summary

Problems solved by technology

[0008] However, in this case, the following problems arise: Assuming that the electronic piano is stored indoors in an upright position with the left and right sides being longitudinally opposite positions, if the room temperature becomes extremely high, such as in summer, the electronic piano is The longitudinal ribs of the keyboard will bend downward due to the own weight of the keyboard chassis and the weight of the hammers, which will cause deformation of the keyboard chassis

In addition, in the event that the amount of lubricant applied to the key guide is too large, there may be a problem of lubricant leaking from the key

On the other hand, in Japanese Patent Laid-Open H11-296162 (Kokai), since the guide member is formed in a hollow cylindrical shape covering the outside of the guide member holding portion, the amount of material for forming the guide member becomes large, resulting in an increase in cost

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