Support assembly and keyboard apparatus
A support assembly of a keyboard apparatus activated in accordance with pressing of a key to rotate a hammer provided at one end of a hammer shank, the support assembly includes a support rotatably disposed with respect to a frame, a jack having one side rotatably connected to the support and another side including a contact surface which makes contact with a hammer shank roller provided to the hammer shank, and a rib provided to the other side of the jack and projecting to a hammer shank roller side of the contact surface.
1. A support assembly of a keyboard apparatus activated in accordance with pressing of a key to rotate a hammer provided at one end of a hammer shank, the support assembly comprising:
a support rotatably disposed with respect to a frame; and
a jack rotatably disposed with respect to the support and having one end including a rib which makes contact with a hammer shank roller provided to the hammer shank.
2. The support assembly according to claim 1 , wherein the rib is provided on the other side of the jack opposite to a rotation center of the support.
3. The support assembly according to claim 1 , wherein the rib has a contact surface in a curved shape on the hammer shank roller side.
4. The support assembly according to claim 3 , wherein the curved shape is a convex shape.
5. The support assembly according to claim 3 , wherein the curved shape is a concave shape.
6. The support assembly according to claim 1 , wherein the rib has a contact surface on the hammer shank roller side, the contact surface being provided with a projection.
7. The support assembly according to claim 1 , wherein a projection which rotates together with the jack is provided on the one side of the jack.
8. The support assembly according to claim 7 , wherein the projection is away from the support when the jack is in a stationary state.
9. A keyboard apparatus comprising:
support assemblies each activated in accordance with pressing of a key to rotate a hammer provided at one end of a hammer shank; and
keys disposed correspondingly to the respective support assemblies,
each of the support assemblies including
a support rotatably disposed with respect to a frame, and
a jack rotatably disposed with respect to the support and having one end including a rib which makes contact with a hammer shank roller provided to the hammer shank.
10. The support assembly according to claim 9 , wherein the rib is provided on the other side of the jack opposite to a rotation center of the support.
11. The support assembly according to claim 9 , wherein the rib has a contact surface in a curved shape on the hammer shank roller side.
12. The support assembly according to claim 11 , wherein the curved shape is a convex shape.
13. The support assembly according to claim 11 , wherein the curved shape is a concave shape.
14. The support assembly according to claim 9 , wherein the rib has a contact surface on the hammer shank roller side provided with a projection.
15. The support assembly according to claim 9 , wherein a projection which rotates together with the jack is provided on the one side of the jack.
16. The support assembly according to claim 15 , wherein the projection is away from the support when the jack is in a stationary state.
17. The support assembly according to claim 1 , wherein the rib is provided over a contact surface and projects in a direction to a hammer shank roller side.