Baby Carriage Seat Locking Mechanism for Easy Height Adjustment

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Solution Overview

Problem

Conventional stroller seats with height adjusting mechanisms are cumbersome to operate and complicated, leading to inconvenience and increased manufacturing costs.

Innovation Solution

A seat with a height adjusting mechanism featuring a support base, unlock member, and lock member, where the lock member protrudes through a through hole in the support base and is retractable via a first and second driving portion mechanism, allowing easy adjustment and fixation of the seat's height.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a conventional height adjusting mechanism is used, then the seat height can be adjusted for different babies or children, but the mechanism becomes cumbersome and complicated to operate

Engineering Contradiction:

Improveseat height adjustment capabilityVSAvoidoperation convenience

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The height adjustment mechanism is segmented into discrete height positions with corresponding lock members. Each lock member independently controls engagement at a specific height level, allowing simple one-handed operation to select desired height by engaging the corresponding lock member, rather than manipulating a complex continuous adjustment mechanism

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The lock members are designed to automatically engage with the support base at predetermined height positions. When the support base is moved to a desired height, the corresponding lock member automatically engages through the through-hole, providing self-locking functionality without requiring complex manual operation or additional locking mechanisms

Inventive Principle:

Principle #25Self-service

2Adaptability or versatility

If a conventional height adjusting mechanism is used, then the seat height can be adjusted, but the structure becomes complicated

Engineering Contradiction:

Improveseat height adjustment capabilityVSAvoidmechanism structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The adjustment mechanism is divided into discrete height levels, each with a simple lock member and through-hole pair. This segmentation avoids the need for complex continuous adjustment mechanisms, reducing overall structural complexity while maintaining multi-position adjustment capability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The locking function is extracted as separate, independent lock members rather than being integrated into a complex unified mechanism. Each lock member is a simple component that can be easily manufactured and assembled, reducing overall structural complexity compared to integrated conventional mechanisms

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 3:

The lock members serve multiple functions: they act as both the locking mechanism and the height indicator, and they automatically engage and disengage based on the support base position. This multi-functionality eliminates the need for separate indicators and locking mechanisms, simplifying the overall structure

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If a conventional height adjusting mechanism is used, then the seat height can be adjusted, but the manufacturing cost increases

Engineering Contradiction:

Improveseat height adjustment capabilityVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The mechanism uses multiple simple, identical lock members rather than a single complex mechanism. This standardization of components allows for economical manufacturing through mass production of identical parts, reducing per-unit costs despite the multi-position adjustment capability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The lock members are designed as simple, inexpensive components that can be easily manufactured from basic materials. Their simple geometry and function allow for cost-effective production, making the overall adjustment mechanism more economical than conventional complex mechanisms

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Data Source

PatentUS12630209B2Seat and baby carriage

Publication Date: 2026.05.19 WONDERLAND SWITZERLAND AG

AI summary

A seat includes a support base, an unlock member and a lock member. The support base has at least one through hole. The unlock member is movably disposed on the support base and has at least one first driving portion. The lock member is movably disposed on the unlock member. The lock member has at least one lock portion protruding from a surface of the support base through the at least one through hole and at least one second driving portion abutting against the at least one first driving portion. When the unlock member is forced in a first direction to move, the at least one lock portion is forced to move along the at least one first driving portion through the at least one second driving portion and retracts into the support base in a second direction different from the first direction.