Seat Assembly Cam Washer Non-Circular Constraint
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Solution Overview
Problem
Existing exercise equipment, such as exercise bikes, often have seat adjustment mechanisms that are difficult to reposition, not robust, and counterintuitive, failing to adequately accommodate users of different sizes and preferences.
Innovation Solution
A seat assembly with a slider assembly that includes a slider with an open end defined between two arms, a cam for moving the slider between clamping and sliding configurations, and a cam washer to limit cam movement, allowing for adjustable and secure positioning of the seat along a seat post.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional seat adjustment mechanism is used, then the seat can be adjusted to different positions, but the mechanism becomes difficult to reposition and not robust
Solution Approach 1:
The mechanism transitions from a static locked position to a dynamic adjustable state through cam rotation. The cam profile is designed to automatically guide the slider through adjustment phases, making the system adaptable and easy to reposition while maintaining structural robustness through the rigid cam and slider components.
Solution Approach 2:
The cam acts as an intermediary element between the user's manual input and the slider's movement. By rotating the cam, the user indirectly controls the slider's position through the cam's profile-guided motion, simplifying the operation while maintaining a robust mechanical connection through the cam-follower interaction.
2Ease of operation
If a traditional seat adjustment mechanism is used, then the seat can be adjusted, but the mechanism becomes counterintuitive
Solution Approach 1:
The adjustment mechanism is segmented into distinct functional phases: the cam rotation is divided into a first phase for loosening and a second phase for tightening. This segmentation makes the operation intuitive by providing clear, sequential steps that are easy to understand and execute, reducing the perceived complexity for the user.
Solution Approach 2:
The cam rotation employs periodic action with distinct phases: a first periodic phase for loosening the slider and a second periodic phase for tightening it. This periodic structure creates an intuitive rhythm in the operation, making the mechanism easier to understand and use while maintaining manageable complexity through the regular, repeating motion pattern.
3Adaptability or versatility
If the cam is allowed to rotate freely relative to the slider, then the adjustment range is increased, but the movement control is lost
Solution Approach 1:
The cam washer provides localized constraint at specific points in the rotation cycle. During the first phase of rotation, the cam washer allows free movement for loosening, while during the second phase, it engages to control the tightening motion. This local differentiation of constraint quality enables both wide adjustment range and precise movement control at appropriate moments.
Solution Approach 2:
The cam washer dynamically transitions between constrained and unconstrained states during cam rotation. It allows the cam to rotate freely during the loosening phase for maximum adjustment range, then engages to control the tightening phase for precise movement control, making the system both adaptable and easy to operate.
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
The solution provides a robust and intuitive method for adjusting the seat position on exercise equipment, enhancing user comfort and accommodating various user sizes and preferences, while ensuring secure attachment to the seat post.
Implementation Method 1
The cam washer may include a base seated within the cutout disposed in the slider, the base having a non-circular shape for engagement with a complementary shape of the cutout
Implementation Method 2
The seat assembly may further include a cam coupled to the slider and movable between a first position and a second position
Implementation Method 3
a slider configured to slide along the seat post and movable between a first configuration clamping the slider to the seat post
Data Source
AI summary
A seat assembly for adjustably connecting a seat to a seat post is provided. The seat assembly may include a slider configured to slide along the seat post, a cam coupled to the slider and movable between a first position and a second position, and a cam washer positioned between the cam and the slider. The cam washer may include a base seated within a cutout disposed in the slider, the base having a non-circular shape for engagement with a complementary shape of the cutout. The cam washer may include a tab extending from the base, the tab seated within the cam. Associated systems and methods are also provided.