Fastening structure and keyboard device

Patent metadata

Field	Value
Publication number	US-12305685-B2
Application number	US-202318207207-A
Country	US
Kind code	B2
Filing date	Jun 8, 2023
Priority date	Mar 23, 2017
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A fastening structure for fastening a to-be-fastened component to a wooden component by using a screw, wherein the wooden component is made of wood having a specific gravity of 0.08 g/cm 3 to 0.85 g/cm 3 inclusive, the screw has a nominal diameter of 0.8 mm to 3.5 mm inclusive, and the distance between a neutral position in a longitudinal direction of an effective screw part, which is the portion where the wooden component and a male screw part formed in a shaft part of the screw mesh together, and the surface of the wooden component that comes into contact with the to-be-fastened component is 1 mm to 15 mm inclusive.

First claim

What is claimed is:

1. A keyboard device having a fastening structure, comprising:
a wood key of the keyboard device;
a to-be-fastened component; and
a screw for fastening the to-be-fastened component to the wood key, wherein
the wood key is made of wood having a specific gravity of 0.08 g/cm 3 to 0.85 g/cm 3 inclusive;
the screw has a nominal diameter of 0.8 mm to 3.5 mm inclusive; and
the distance between an intermediate position in a longitudinal direction of an effective screw portion, which is the portion where the wood key and a male screw portion formed on a shaft portion of the screw mesh together, and a contact surface of the wood key with the to-be-fastened component is 1 mm to 15 mm inclusive.

2. The keyboard device according to claim 1 , wherein the to-be-fastened component is a backcheck component.

3. The fastening structure according to claim 1 , wherein the area of the contact surface is 100 mm 2 or less per screw.

4. The fastening structure according to claim 1 , wherein a plurality of projections are provided on at least one surface of the wood key and the to-be-fastened component that are facing each other.

5. The fastening structure according to claim 1 , wherein a distance between a to-be-pressed surface where the to-be-fastened component is pressed from the head portion of the screw and the contact surface is 2 mm or less.

6. The fastening structure according to claim 1 , wherein the effective screw portion is entangled with a dark ring of the wood key.

Assignees

• Yamaha Corp

Inventors

• FUJISHIRO Kaoru
• Osuga Ichiro

Classifications

• G10C3/12

  Keyboards; Keys · CPC title

• F16B5/00

  Joining sheets or plates {, e.g. panels,} to one another or to strips or bars parallel to them ({F16B17/00 takes precedence;} by sticking together F16B11/00; dowel connections F16B13/00; pins, including deformable elements F16B19/00; covering of walls E04F13/00; fastening signs, plates, panels or boards to a supporting structure, fastening readily-detachable elements, e.g. letters to signs, plates, panels, or boards, G09F7/00) · CPC title

• G10C3/16

  Actions · CPC title

• F16B25/0015

  the material being a soft organic material, e.g. wood or plastic (F16B25/0031 takes precedence) · CPC title

• G10C9/00

  Methods, tools or materials specially adapted for the manufacture or maintenance of musical instruments covered by this subclass · CPC title