Patent ID: 11865953
Assignee: BAMBINO PREZIOSO SWITZERLAND AG
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A side impact protection mechanism provided at a backrest of a child safety seat and comprising a side impact protection block movably fitted to the backrest and having a folding position in which the side impact protection block is inwardly folded in the backrest and an unfolding position in which the side impact protection block is outwardly unfolded from the backrest, wherein the side impact protection mechanism further comprises a self-locking structure fitted to the side impact protection block or the backrest, the self-locking structure automatically moves to a position where the self-locking structure blocks the side impact protection block in the unfolding position from switching to the folding position when the side impact protection block is switched from the folding position to the unfolding position, and the backrest and the side impact protection block shields the self-locking structure to block a release operation of the self-locking structure by an operator;
wherein the self-locking structure comprises a self-locking member fitted to the backrest or the side impact protection block and being telescopically slidable, and a self-locking reset member providing a reset force for a telescopically slidable movement of the self-locking member, the self-locking reset member has a constant tendency to drive the self-locking member to slide in an extending direction to a position that blocks the side impact protection block in the unfolding position from switching to the folding position;
wherein the side impact protection block comprises a side impact protection block body pivoted to the backrest and a blocking member slidable to a blocking position or an avoidance position on the side impact protection block body, the blocking member projects out of the side impact protection block body to be in a blocking position that blocks against the backrest in a folding direction when the side impact protection block switches to the unfolding position, meanwhile the self-locking member slides to a position that blocks the side impact protection block in the unfolding position from switching to the folding position under an action of the self-locking reset member, the blocking member is retracted into the side impact protection block body to be in the avoidance position that is free from blocking against the backrest in the folding direction when the side impact protection block is in the folding position, and the self-locking member is pushed by the backrest to be in a retracted state in which the self-locking reset member is elastically deformed.