Keyboard device and keyboard instrument

Patent metadata

Field	Value
Publication number	US-10418003-B2
Application number	US-201815920084-A
Country	US
Kind code	B2
Filing date	Mar 13, 2018
Priority date	Mar 17, 2017
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

A keyboard device is provided whose entire device body can be compactified even if a hammer member length in its front and rear direction is increased and a keyboard instrument including the keyboard device. The keyboard device includes a plurality of keys, a transmission member which is rotated in response to a key depression operation performed on a key among the plurality of keys, and a hammer member which is rotated in response to rotation of the transmission member and applies an action load to the key, in which the hammer member includes a hammer arm and a hammer head provided on a front side of the hammer arm, and the hammer arm is rotated around a hammer rotation center located on a rear side of the hammer arm in response to the key depression operation performed on the key.

First claim

What is claimed is:

1. A keyboard device comprising:
a plurality of keys;
a plurality of capstans which are provided on upper rear portions of the plurality of keys respectively;
a transmission member which includes a transmission body section located on an upper side of a capstan and a transmission fitting section rotatably mounted on a transmission holding shaft, the transmission member being rotated in response to a key depression operation performed on a key among the plurality of keys; and
a hammer member which is rotated in response to rotation of the transmission member and applies an action load to the key,
wherein the hammer member includes a hammer arm and a hammer head provided closer to a front side of the plurality of keys than the hammer arm,
wherein the hammer arm is rotated around a hammer rotation center located closer to a rear side of the plurality of keys than the hammer arm, in response to the key depression operation performed on the key, and
wherein the transmission holding shaft is located closer to the front side of the plurality of keys than the capstan, and the hammer head is located closer to the front side of the plurality of keys than the transmission holding shaft.

2. The keyboard device according to claim 1 , wherein the transmission body section is rotated around a transmission rotation center located on a front side of the transmission body section in response to the key depression operation performed on the key.

3. The keyboard device according to claim 2 , wherein the transmission rotation center is located ahead of the hammer rotation center in a direction perpendicular to an array direction of the plurality of keys.

4. The keyboard device according to claim 1 , wherein a hammer rail which holds the hammer member is arranged behind the hammer rotation center.

5. The keyboard device according to claim 1 , wherein the hammer head is arranged in a middle area in a direction perpendicular to an array direction of the plurality of keys and positioned above a key support shaft which supports the key.

6. The keyboard device according to claim 1 , wherein the hammer rotation center of the hammer member is located closer to a rear side of the key than a contact section where the transmission member comes in contact with the key, and
wherein an interlock section which causes the transmission member and the hammer member to be interlocked with each other is arranged between the hammer rotation center of the hammer member and the contact section in a front and rear direction of the key, the interlock section comprising an interlock projecting section provided on the transmission member and an interlock hole provided in the hammer member into which the interlock projecting section is inserted.

7. The keyboard device according to claim 1 , further comprising:
an upper-limit stopper which is positioned ahead of and above the hammer rotation center and with which the hammer arm comes in contact in response to the key depression operation performed on the key.

8. The keyboard device according to claim 1 , further comprising:
a lower-limit stopper which is positioned ahead of and below the hammer rotation center and with which the hammer arm comes in contact in response to the key depression operation performed on the key.

9. A keyboard instrument comprising:
the keyboard device according to claim 1 ; and
a sound emitting section which emits a musical sound in response to the key depression operation performed on the key of the keyboard device.

10. A keyboard device comprising:
a plurality of keys;
a transmission member which is rotated in response to a key depression operation performed on a key among the plurality of keys; and
a hammer member which is rotated in response to rotation of the transmission member and applies an action load to the key,
wherein the hammer member includes a hammer arm and a hammer head provided on a front side of the hammer arm,
wherein the hammer arm is rotated around a hammer rotation center located on a rear side of the hammer arm in response to the key depression operation performed on the key, and
wherein a transmission rail which holds the transmission member is supported on a key support shaft which rotatably supports the key.

Assignees

• Casio Computer Co Ltd

Inventors

• Taniguchi Hirokazu

Classifications

• G10C3/04

  Frames; Bridges; Bars · CPC title

• G10H1/346 Primary

  Keys with an arrangement for simulating the feeling of a piano key, e.g. using counterweights, springs, cams · CPC title

• G10C3/12

  Keyboards; Keys · CPC title

• G10C3/18 Primary

  Hammers · CPC title