Mechanical component, movement, and timepiece
A mechanical component includes a component main body having a through-hole through which a shaft member is passed, and a forcing-in portion made of metal material formed on the inner surface of the through-hole and fixed to the shaft member through the forcing-in of the shaft member. The component main body has a retaining recess and the forcing-in portion fills the inner space of the retaining recess so that the retaining recess constitutes an anchor structure regulating displacement of the forcing-in portion with respect to the component main body.
1. A mechanical component, comprising:
a component main body having a through-hole through which a shaft member is passed; and
a forcing-in portion formed on the inner surface of the through-hole and fixed to the shaft member through the forcing-in of the shaft member,
wherein a retaining recess is formed on the inner surface of the through-hole, a part of the forcing-in portion fills the inner space of the retaining recess and another part of the forcing-in portion protrudes inwardly from the inner surface of the through-hole, and the retaining recess constitutes an anchor structure regulating displacement of the forcing-in portion with respect to the component main body by retaining at least a part of the forcing-in portion; and
wherein the forcing-in portion is formed of a metal material.
2. The mechanical component according to claim 1 , wherein the retaining recess regulates inward displacement of the forcing-in portion by making the width dimension thereof at a first position smaller than the width dimension thereof at a second position on the outer peripheral side of the first position.
3. The mechanical component according to claim 1 , wherein the retaining recess has a receiving step portion the peripheral dimension of which increases discontinuously toward the exterior; and
the forcing-in portion has an abutment step portion abutting the receiving step portion.
4. The mechanical component according to claim 2 , wherein the retaining recess has a receiving step portion the peripheral dimension of which increases discontinuously toward the exterior; and
the forcing-in portion to has abutment step portion abutting the receiving step portion.
5. The mechanical component according to claim 1 , wherein the forcing-in portion is divided at least at one position in the peripheral direction of the component main body.
6. The mechanical component according to claim 2 , wherein the forcing-in portion is divided at least at one position in the peripheral direction of the component main body.
7. The mechanical component according to claim 3 , wherein the forcing-in portion is divided at least at one position in the peripheral direction of the component main body.
8. The mechanical component according to claim 4 , wherein the forcing-in portion is divided at least at one position in the peripheral direction of the component main body.
9. The mechanical component according to claim 1 , wherein the component main body has a receiving recess receiving a swollen deformed portion of the forcing-in portion generated through the forcing-in of the shaft member.
10. The mechanical component according to claim 2 , wherein the component main body has a receiving recess receiving a swollen deformed portion of the forcing-in portion generated through the forcing-in of the shaft member.
11. The mechanical component according to claim 3 , wherein the component main body has a receiving recess receiving a swollen deformed portion of the forcing-in portion generated through the forcing-in of the shaft member.
12. The mechanical component according to claim 4 , wherein the component main body has a receiving recess receiving a swollen deformed portion of the forcing-in portion generated through the forcing-in of the shaft member.
13. The mechanical component according to claim 5 , wherein the component main body has a receiving recess receiving a swollen deformed portion of the forcing-in portion generated through the forcing-in of the shaft member.
14. The mechanical component according to claim 6 , wherein the component main body has a receiving recess receiving a swollen deformed portion of the forcing-in portion generated through the forcing-in of the shaft member.
15. The mechanical component according to claim 1 , wherein the forcing-in portion has a displacement regulating structure regulating displacement in the thickness direction with respect to the component main body.
16. The mechanical component according to claim 1 , wherein the component main body is formed of a brittle material.
17. A movement equipped with a mechanical component as claimed in claim 1 .
18. A timepiece equipped with a movement as claimed in claim 17 .