US 11,872,915 B2
Vehicle seat reclining device
Hiroaki Teraguchi, Aichi (JP); and Takeshi Nishiura, Aichi (JP)
Assigned to TOYOTA BOSHOKU KABUSHIKI KAISHA, Aichi-Ken (JP)
Appl. No. 17/780,583
Filed by TOYOTA BOSHOKU KABUSHIKI KAISHA, Aichi-ken (JP)
PCT Filed Nov. 27, 2020, PCT No. PCT/JP2020/044358
§ 371(c)(1), (2) Date May 27, 2022,
PCT Pub. No. WO2021/107138, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 2019-215013 (JP), filed on Nov. 28, 2019.
Prior Publication US 2023/0001828 A1, Jan. 5, 2023
Int. Cl. B60N 2/235 (2006.01)
CPC B60N 2/2356 (2013.01) 4 Claims
OG exemplary drawing
 
1. 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 ratchet 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 pushes and moves the plurality of 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 the cam,
the main pawl includes a bulging portion configured to abut against the pressing portion,
each of the pawls other than the main pawl do not include a portion corresponding to the bulging portion of the main pawl, 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.