Patent ID: 11872915
Assignee: TOYOTA BOSHOKU KABUSHIKI KAISHA
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 3:
4. A vehicle seat reclining device comprising:
a ratchet and a guide assembled in an axial direction thereof to be rotatable relative to each other;
a plurality of pawls that are supported from both sides in a relative rotation direction of the rachet and the guide by a pair of guide walls provided on the guide, mesh with the ratchet by movement of being pushed outward in a radial direction of the guide, and are arranged in the relative rotation direction and restrict relative rotation between the ratchet and the guide; and
a cam that includes pressing portions corresponding to the pawls and that pushes and moves the corresponding pawls outward from an inner side in the radial direction, wherein
one of the plurality of pawls is a main pawl having a rattle preventing structure that reduces rattling of the main pawl in the relative rotation direction by bringing the pawl into contact with both of the pair of guide walls in a case where the main pawl is pushed and moved by one of the pressing portions which corresponds to the main pawl,
at least one of the main pawls and the one of the pressing portions includes a bulging portion, and
the main pawl is pushed out with the bulging portion such that outer teeth of the main pawl enter inner teeth of the ratchet before outer teeth of the other pawls enter inner teeth of the ratchet.