Bicycle Spacer With Lateral Cable Guide Gap
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Solution Overview
Problem
Existing spacers for bicycles do not facilitate easy assembly and mounting of cables between the headset and stem, requiring disassembly of the stem for spacer placement or removal.
Innovation Solution
A spacer with a cable guide featuring a lateral cable entry gap and resilient arms that allow elastic widening for easy cable insertion, combined with a tubular section for smooth integration with the steering tube, and cable retaining means to secure the cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the stem is disassembled for spacer placement or removal, then the spacer can be installed or removed, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The cable guide is pre-integrated into the spacer structure with a pre-formed gap, allowing cables to be inserted through the gap before the spacer is fully installed. This preliminary cable routing action eliminates the need for stem disassembly, as the cable can be threaded through the gap while the spacer is being positioned between the headset and stem.
2Ease of operation
If the cable guide wall is rigid, then the structure is simple and strong, but cable insertion becomes difficult
Solution Approach 1:
The cable guide wall incorporates a gap that allows it to flex and expand dynamically during cable insertion. The gap enables the cable guide wall to move from a closed position to an open position as the cable passes through, providing a flexible insertion path while maintaining structural integrity. This dynamic behavior simplifies cable insertion without requiring complex mechanisms.
3Ease of operation
If the resilient arms are made more flexible, then cable insertion becomes easier, but the cable retention capability decreases
Solution Approach 1:
The cable guide structure employs local quality differentiation: the gap region is designed with higher flexibility to facilitate cable insertion, while the cable retention region incorporates friction elements and engagement features with higher rigidity to secure the cable. This localized variation in mechanical properties allows the same component to provide both easy insertion and reliable retention without compromise.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables easier and more efficient cable management during assembly by allowing sideward cable insertion and secure retention, simplifying the assembly process and ensuring cables are protected from sharp edges.
Implementation Method 1
the cable guide wall comprises one or more resilient arms, so the gap can elastically be widened during insertion of a cable
Data Source
Figure 1~2
Figure 3~4
AI summary
Spacer for spacing a headset from a stem of a bicycle. The spacer comprises a cable guide, in particular for brake cables and gear shift cables. The cable guide is provided with a cable guide opening and a cable guide wall enclosing the cable guide opening. The cable guide wall is interrupted by a cable insertion gap, allowing lateral insertion of a cable. Optionally, the cable guide comprises cable retaining means for retaining an inserted cable within the cable guide opening.