Child Safety Seat Adjustment Structure for Multi-Direction Tilt Locking
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Solution Overview
Problem
Existing child safety seat tilt angle adjustment structures are complex, leading to difficulties in assembly and increased costs, and require more flexible operation to adjust the seat tilt in various directions.
Innovation Solution
A seat adjustment structure that includes a pair of engaging members symmetrically fixed to the base and seat, a locking assembly, an operating member, and a cable connecting the operating member to the locking assembly, allowing vertical movement to lock or unlock the engaging members, enabling sliding and rotational adjustments along a longitudinal centerline.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a normal seat tilt angle adjustment structure is used, then the seat can be adjusted to upright or lying state, but the design becomes complicated leading to difficult assembling and increased cost
Solution Approach 1:
The adjustment structure is divided into independent functional modules: engaging members with engaging holes for position selection, a locking assembly with locking ball and elastic member for secure locking, and a pulling member with cable for operation. This segmentation allows each module to be optimized independently and assembled together, reducing overall design complexity while maintaining adjustment functionality.
Solution Approach 2:
The cable acts as an intermediary element that transmits the pulling force from the pulling member to the locking assembly. This intermediary mechanism allows the user to operate the locking/unlocking function from a convenient location without directly manipulating the locking components, simplifying the user interface while maintaining reliable locking action.
2Adaptability or versatility
If the seat needs rotation about vertical axis for fore and aft direction adjustment, then the seat can face forward, rearward or sideways, but the tilt angle adjustment structure requires more flexible operation mode
Solution Approach 1:
The locking assembly with the cable-connected pulling member serves multiple functions: it locks the seat at various tilt angles (upright, lying, intermediate positions) and works effectively regardless of the seat's rotational orientation. The universal design of the engaging members and locking mechanism allows the same structure to function whether the seat faces forward, rearward, or sideways, eliminating the need for separate adjustment mechanisms for different orientations.
3Adaptability or versatility
If multiple engaging holes are provided for different tilt positions, then various tilt angles can be achieved, but the structure becomes more complex
Solution Approach 1:
The engaging members are designed with an asymmetric distribution of engaging holes along their length, with holes positioned at specific intervals to provide common tilt positions (upright, intermediate, lying) that satisfy most usage scenarios. This asymmetric but optimized arrangement provides necessary position versatility without the complexity of symmetric comprehensive coverage, reducing the number of holes needed while maintaining essential adjustment capabilities.
Data Source
AI summary
A seat adjustment structure for adjusting a relative position between a seat and a base carrying the seat is provided. The seat adjustment structure is slidable with respect to the base along a longitudinal centerline, and includes: a pair of engaging members, fixed to one of the base or the seat with respect to the longitudinal centerline; a locking assembly, fixed to the other of the base or the seat, the locking assembly lockable to or unlockable from the engaging member; an operating member movable with respect to the seat along a vertical direction; and a cable, connecting the operating member and the locking assembly, and arranged to transmit a vertical movement of the operating member to the locking assembly, thereby causing the locking assembly to be locked or unlocked with respect to the engaging member to lock or unlock the base with respect to the seat.