Stroller Handle Lock Selection to Prevent Accidental Unlocking
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Solution Overview
Problem
Existing stroller designs face the risk of unintended unlocking due to the possibility of mistakenly moving the selection member to the wrong side and pushing the operation member, leading to incorrect activation of lock mechanisms.
Innovation Solution
A stroller design with a handle frame that includes a first and second lock mechanism, an operation member, and actuation members that are displaced between positions along intersecting directions, with the operation member selectively activating one of the lock mechanisms at different positions, ensuring easy distinction between them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a selection member is provided that is slidable along the central axis of the handle to select between first and second unlock modules, then the operator can selectively activate different lock mechanisms, but the operator may mistakenly move the selection member to the wrong side and push the operation member, leading to unintended unlocking operation
Solution Approach 1:
The patent introduces a new spatial dimension for operation member displacement. Instead of only sliding the selection member along the central axis (one dimension), the operation member is now displaceable in two different directions: a first direction for selecting between lock mechanisms and a second direction (intersecting the first direction) for actuating the selected lock mechanism. This dimensional expansion allows the system to distinguish between selection and actuation actions, preventing accidental unlocking while maintaining selective activation capability.
2Adaptability or versatility
If the operation member is displaceable between first and second positions along the central axis to select between lock mechanisms, then different lock mechanisms can be activated, but it becomes difficult for the operator to easily distinguish between different lock mechanisms
Solution Approach 1:
The patent adds a second displacement direction for the operation member that intersects with the first direction (central axis). The first position and second position along the central axis correspond to different lock mechanisms, while the pre-operation and post-operation positions in the intersecting direction indicate the actuation state. This creates a two-dimensional operation space where selection and actuation are clearly distinguished, improving ease of operation and distinguishability.
Solution Approach 2:
The patent employs visual indicators (analogous to color changes) to help operators distinguish between different lock mechanism positions. The handle frame includes indication members that visually indicate the first and second positions of the operation member, allowing operators to easily identify which lock mechanism will be activated without confusion.
3Device complexity
If a single operation member is used to actuate both first and second lock mechanisms through sliding motion, then the device complexity is reduced, but the reliability decreases due to potential mistaken operation
Solution Approach 1:
The patent maintains a single operation member (reducing device complexity) but introduces two-dimensional displacement capability. The operation member can move in a first direction (along the central axis) to select between lock mechanisms and in a second direction (intersecting the first direction) to actuate the selected mechanism. This dimensional expansion ensures that selection and actuation require distinct motion sequences, preventing mistaken operation and improving reliability while keeping the device simple.
Data Source
AI summary
A stroller includes: a body frame including a wheel; a handle frame; a first lock mechanism configured to switch one movable portion of the body frame between a locked state and an unlocked state; a second lock mechanism configured to switch another movable portion of the body frame between a locked state and an unlocked state; and an operation member provided in the handle frame and configured to selectively activate one of the first and second lock mechanisms. The operation member is displaceable between a first position and a second position and is displaceable from a pre-operation position to a post-operation position. The first lock mechanism is switched to a locked state or an unlocked state by displacing the operation member in the first position. The second lock mechanism is switched to a locked state or an unlocked state by displacing the operation member in the second position.