Self-Locking Clip Mechanism for Mobile Device Holder
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Solution Overview
Problem
Customers face difficulties in using portable computing devices while pushing shopping carts, as they need to manually hold the devices to operate them, which is inconvenient and limits their ability to manage the cart effectively.
Innovation Solution
A self-locking clip mechanism that securely attaches a portable computing device cradle to a shopping cart handle, allowing the device to be used hands-free, featuring an inner and outer sleeve that interlock to form a circular shape around the cart handle and include an interlock slide for locking the cradle, enabling the device to be easily inserted and removed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a portable computing device is manually held while pushing a shopping cart, then the customer can operate the device, but the customer cannot push the cart effectively and must use one hand
Solution Approach 1:
The attachment mechanism is divided into two separate sleeves: an inner sleeve that attaches to the shopping cart handle and an outer sleeve that attaches to the device cradle. These segments can be independently assembled and configured, allowing the system to adapt to different handle types while maintaining a secure connection.
Solution Approach 2:
The inner sleeve is inserted within the outer sleeve to form a nested structure that encircles the shopping cart handle. This nesting arrangement allows the smaller inner sleeve to be positioned first on the handle, followed by the outer sleeve that provides additional securing and alignment features.
2Reliability
If a secure attachment mechanism is used to fix the device to the cart, then the device remains stable, but the mechanism becomes complex and difficult to assemble
Solution Approach 1:
The interlock slide feature automatically engages when the outer sleeve is positioned over the inner sleeve, creating a self-locking mechanism that secures the two sleeves together without requiring additional fasteners or complex assembly steps. The geometry of the protrusion and groove ensures proper alignment and locking.
Solution Approach 2:
The interlock slide features an asymmetric protrusion on one sleeve that mates with a corresponding asymmetric groove on the other sleeve. This asymmetric design prevents improper assembly while ensuring a secure, unique locking configuration that maintains attachment reliability.
3Reliability
If the sleeves are designed to fully encircle the cart handle for maximum security, then the attachment is more reliable, but the structure becomes more complex and requires more material
Solution Approach 1:
Rather than fully encircling the handle, the sleeves are designed with C-shaped cross-sections that provide securing features at specific critical locations. The opening in the C-shape is positioned to allow easy assembly while the closed portions provide sufficient contact area for reliable attachment.
Data Source
AI summary
A clip for coupling a portable computing device to a shopping cart comprises an inner sleeve. The inner sleeve partially encircles and applies a force to a tubular element of the shopping cart. An outer sleeve partially encircles the inner sleeve and couples the inner sleeve to the tubular element of the shopping cart. One of the inner sleeve and the outer sleeve includes a protrusion that mates with a groove in the other of the inner sleeve and the outer sleeve for locking the inner sleeve in the outer sleeve. The inner sleeve further includes a interlock slide that extends from a region of the inner sleeve not encircled by the outer sleeve for communicating with a mobile device cradle. The portable computing device is coupled to the mobile device cradle. A mobile device holder holds a mobile device for a shopper while shopping in a retail store.