Support assembly and keyboard apparatus

Patent metadata

Field	Value
Publication number	US-9672797-B2
Application number	US-201615217005-A
Country	US
Kind code	B2
Filing date	Jul 22, 2016
Priority date	Jul 23, 2015
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

A support assembly includes a support rotatably disposed with respect to a frame; a jack support portion connected to the support; a jack having a recessed portion in a lower portion of the jack, the jack having the jack support portion inside the recessed portion and being rotatably disposed to the support; and an acting portion fixed to the jack and receiving a downward action. The recessed portion has an open end with a width larger than a width of the jack support portion. The recessed portion may have an open end with a width larger than a width of the jack support portion.

First claim

The invention claimed is:

1. A support assembly comprising:
a support rotatably disposed with respect to a frame;
a jack support portion connected to the support;
a jack having a recessed portion in a lower portion of the jack, the jack having the jack support portion inside the recessed portion and being rotatably disposed to the support; and
an acting portion fixed to the jack and receiving a downward action.

2. The support assembly according to claim 1 , wherein
the recessed portion has an open end with a width larger than a width of the jack support portion.

3. The support assembly according to claim 1 , further comprising a jack pressing portion being contact with the acting portion from above to press the jack downward.

4. The support assembly according to claim 3 , wherein
the jack pressing portion is an elastic member connected to the support.

5. The support assembly according to claim 3 , wherein
the jack includes a projecting portion projecting from the jack, and
the acting portion is provided to the projecting portion.

6. The support assembly according to claim 3 , wherein
the jack pressing portion provides a rotating action of the jack to the acting portion.

7. The support assembly according to claim 6 , wherein
the jack has a stopper regulating a rotation range of the jack with respect to the rotating action.

8. The support assembly according to claim 7 , wherein
the jack has a large jack projecting upward, a projecting portion projecting from the large jack and a small jack projecting in a direction opposite to the projecting portion, and
the stopper regulates the rotation range of the jack by abutting on another member on a deeper side from a player of the large jack, above the small jack, or below the projecting portion and a distance from a rotation center of the jack to a position where the stopper abuts on the other member is farther than a distance from the rotation center of the jack to the acting portion.

9. A support assembly comprising:
a support rotatably disposed with respect to a frame and having a recessed portion in an upper portion of the support;
a jack rotatably disposed to the support;
a support connecting portion fixed to the jack, the support connecting portion being disposed inside the recessed portion and including a rotation center of the jack; and
an acting portion fixed to the jack and receiving a downward action.

10. The support assembly according to claim 9 , wherein
the recessed portion has an open end with a width larger than a width of the support connecting portion.

11. The support assembly according to claim 9 , further comprising a jack pressing portion being contact with the acting portion from above to press the jack downward.

12. The support assembly according to claim 11 , wherein
the jack pressing portion is an elastic member connected to the support.

13. The support assembly according to claim 11 , wherein
the jack includes a projecting portion projecting from the jack, and
the acting portion is provided to the projecting portion.

14. The support assembly according to claim 11 , wherein
the jack pressing portion provides a rotating action of the jack to the acting portion.

15. The support assembly according to claim 14 , wherein
the jack has a stopper regulating a rotation range of the jack with respect to the rotating action.

16. The support assembly according to claim 15 , wherein
the jack has a large jack projecting upward, a projecting portion projecting from the large jack and a small jack projecting in a direction opposite to the projecting portion, and
the stopper regulates the rotation range of the jack by abutting on another member on a deeper side from a player of the large jack, above the small jack, or below the projecting portion and a distance from a rotation center of the jack to a position where the stopper abuts on the other member is farther than a distance from the rotation center of the jack to the acting portion.

17. A keyboard apparatus comprising:
a plurality of the support assemblies according to claim 1 ;
keys disposed correspondingly to the respective support assemblies to rotate the support; and
a sound emission mechanism emitting sound in accordance with key pressing.

18. A keyboard apparatus comprising:
a plurality of the support assemblies according to claim 9 ;
keys disposed correspondingly to the respective support assemblies to rotate the support; and
a sound emission mechanism emitting sound in accordance with key pressing.

Assignees

• Yamaha Corp

Inventors

• OHBA Akito
• Ichiki Shunsuke

Classifications

• G10C3/168 Primary

  with hanging jacks, i.e. jacks connected to hammer-butts or hammer-shanks · CPC title

• G10C3/22 Primary

  specially adapted for grand pianos · CPC title

• G10C3/24

  Repetition [tremolo] mechanisms · CPC title

• G10C3/18

  Hammers · CPC title

• G10C3/16

  Actions · CPC title