Keyboard device and keyboard instrument

Patent metadata

Field	Value
Publication number	US-9324306-B2
Application number	US-201514834128-A
Country	US
Kind code	B2
Filing date	Aug 24, 2015
Priority date	Sep 8, 2014
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

A keyboard device including a plurality of transmission members which are provided corresponding to a plurality of keys arranged in parallel and each of which makes a rotating motion in response to a depression operation on a corresponding key, a plurality of hammer members which are provided corresponding to the plurality of keys and each of which makes a rotating motion in response to the rotating motion of the transmission member and thereby provides an action load to the key, and a plurality of interlock control sections each of which controls the rotating motion of the hammer member made in response to the rotating motion of the transmission member by a relative motion of an interlock projecting section of the transmission member with respect to a guide hole provided in the hammer member.

First claim

What is claimed is:

1. A keyboard device comprising:
a plurality of keys; and
action mechanisms respectively provided corresponding to the plurality of keys,
wherein each action mechanism comprises:
a transmission member which is displaced in response to a depression operation on a corresponding key;
a hammer member which provides an action load to the key subjected to the depression operation by making a motion in response to the displacement of the transmission member; and
an interlock control section which has an interlock projecting section provided to one of the transmission member and the hammer member and a guide section which guides the interlock projecting section, and is provided to another one of the transmission member and the hammer member, for controlling the motion of the hammer member made in response to the displacement of the transmission member corresponding to the key subjected to the depression operation by a relative motion between the guide section and the interlock projecting section.

2. The keyboard device according to claim 1 , wherein the guide section is a guide mount section formed at a portion in accordance with displacement of a relative distance between a hammer holding shaft at a rotation center of the hammer member and the interlock projecting section.

3. The keyboard device according to claim 1 , wherein the guide section has a guide hole that engages with the interlock projecting section, and the guide hole is formed such that a length in a longitudinal direction is longer than a length in a direction orthogonal to the longitudinal direction.

4. The keyboard device according to claim 1 , wherein the interlock projecting section comprises a rod-shaped projection body and a shock-absorbing section provided on an outer perimeter of the projection body.

5. The keyboard device according to claim 4 , wherein the shock-absorbing section comprises a sliding projection which elastically slides along a guide edge portion of the guide section.

6. The keyboard device according to claim 1 , wherein the interlock control section further comprises a shock-absorbing member provided to a portion of one of the transmission member and the hammer member, which comes in contact with the other of the transmission member and the hammer member.

7. The keyboard device according to claim 6 , wherein an arc-shaped abutting section is provided to a portion that comes in contact with on the shock-absorbing section.

8. The keyboard device according to claim 1 , wherein the interlock projecting section is provided to the transmission member, and the guide section is provided to the hammer member.

9. The keyboard device according to claim 8 , wherein the guide section is a guide mount section formed at a portion in accordance with displacement of a relative distance between a hammer holding shaft at a rotation center of the hammer member and the interlock projecting section, and has a guide hole that engages with the interlock projecting section.

10. The keyboard device according to claim 8 , wherein the interlock projecting section comprises a rod-shaped projection body and a shock-absorbing section provided on outer perimeter of the projection body.

11. The keyboard device according to claim 10 , wherein the shock-absorbing section comprises a sliding projection which elastically slides along a guide edge portion of the guide section.

12. The keyboard device according to claim 8 , wherein the interlock control section further comprises a shock-absorbing member provided to a portion of one of the transmission member and the hammer member, which comes in contact with the other of the transmission member and the hammer member.

13. The keyboard device according to claim 12 , wherein an arc-shaped abutting section is provided to a portion that comes in contact with the shock-absorbing section.

14. The keyboard device according to claim 1 , wherein the interlock projecting section is provided to the hammer member, and the guide section is provided to the transmission member.

15. The keyboard device according to claim 14 , wherein the guide section is a guide mount section formed at a portion in accordance with displacement of a relative distance between a transmission holding shaft at a rotation center of the transmission member and the interlock projecting section, and has a guide hole that engages with the interlock projecting section.

16. The keyboard device according to claim 14 , wherein the interlock projecting section comprises a rod-shaped projection body and a shock-absorbing section provided on an outer perimeter of the projection body.

17. The keyboard device according to claim 15 , wherein the shock-absorbing section comprises a sliding projection which elastically slides along a guide edge portion of the guide section.

18. The keyboard device according to claim 14 , wherein the interlock control section further comprises a shock-absorbing member provided to a portion of one of the transmission member and the hammer member, which comes in contact with the other of the transmission member and the hammer member.

19. The keyboard device according to claim 17 , wherein an arc-shaped abutting section is provided to a portion that comes in contact with the shock-absorbing section.

20. A keyboard instrument comprising:
a keyboard device; and
a sound source section which emits a musical sound in response to an operation on a key of the keyboard device,
wherein the keyboard device comprises:
a plurality of keys; and
action mechanisms respectively provided corresponding to the plurality of keys, and
wherein each action mechanism comprises a transmission member which is displaced in response to a depression operation on a corresponding key;
a hammer member which provides an action load to the key subjected to the depression operation by making a motion in response to the displacement of the transmission member; and
an interlock control section which has an interlock projecting section provided to one of the transmission member and the hammer member and a guide section which guides the interlock projecting section, provided to another one of the transmission member and the hammer member, for controlling the motion of the hammer member made in response to the displacement of the transmission member corresponding to the key subjected to the depression operation by a relative motion between the guide section and the interlock projecting section.

Assignees

• Casio Computer Co Ltd

Inventors

• Hoshino Akihisa
• Taniguchi Hirokazu

Classifications

• G10C3/22 Primary

  specially adapted for grand pianos · CPC title

• G10C3/12 Primary

  Keyboards; Keys · CPC title

• G10C3/18

  Hammers · CPC title

• G10C3/04

  Frames; Bridges; Bars · CPC title