Four-Bar Linkage Exercise Support for Adjustable Weight Bars
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing weightlifting equipment lacks an efficient and adjustable mechanism for supporting weight bars at various heights, limiting the versatility and safety of exercises like squats and bench presses.
Innovation Solution
An adjustable support system with a four-bar linkage mechanism, including pivotably connected arms and brackets, allows for precise vertical adjustment of a catch member to accommodate weight bars, enabling multiple lift positions and enhanced safety through a spring-loaded catch mechanism and handles for spotting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed support structure is used for weight bars, then the device complexity is reduced, but the adaptability and versatility are limited
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed support structure into a movable, adjustable one. The four-bar linkage mechanism enables the support arms to dynamically change position and height, allowing the catch member to be adjusted to multiple heights along the upright members. This dynamic adjustment capability directly resolves the contradiction by providing adaptability while maintaining manageable complexity through a well-defined mechanical linkage system.
Solution Approach 2:
The support structure is segmented into multiple independent components: attachment structures mounted to upright members, first and second arms pivotably connected to form a four-bar linkage, and a catch member that can be positioned independently. This segmentation allows each component to perform its specific function while contributing to the overall adjustability, resolving the contradiction between versatility and complexity by breaking down the system into manageable, functional segments.
2Adaptability or versatility
If a movable catch member is used, then the versatility and safety are improved, but the device complexity increases
Solution Approach 1:
The four-bar linkage mechanism serves multiple functions simultaneously: it provides height adjustment for the catch member, maintains structural stability during weightlifting exercises, and enables a wide range of motion for various exercises like squats and bench presses. This multi-functionality resolves the contradiction by achieving versatility and safety improvements without proportionally increasing complexity, as a single linkage system accomplishes multiple objectives.
Solution Approach 2:
The four-bar linkage acts as an intermediary mechanism between the fixed attachment structures and the movable catch member. It mediates the transition from fixed to movable support, providing controlled adjustability while maintaining structural integrity. This intermediary mechanism resolves the contradiction by enabling catch member movement and versatility while managing the complexity through a well-defined intermediate linkage system.
3Measurement precision
If precise height adjustment is implemented, then the measurement precision is improved, but the ease of operation is reduced
Solution Approach 1:
The four-bar linkage mechanism is designed to self-adjust and self-lock at desired positions during operation. As the arms pivot and the linkage moves, the geometry of the mechanism naturally maintains precise positioning without requiring additional locking mechanisms or complex controls. This self-service characteristic resolves the contradiction by providing precise height adjustment that is inherently easy to operate, as the mechanism's own structure enables both precision and ease of use.
Data Source
AI summary
An exemplary exercise device includes, among other things, an attachment structure configured to be mounted to a support assembly, a first arm directly pivotably connected to the attachment structure, a second arm directly pivotably connected to the attachment structure, a bracket directly pivotably connected to the first arm and directly pivotably connected to the second arm, and a catch member configured for accepting a weight bar. The catch member is pivotably connected to at least one of the first arm, the second arm, or the at least one bracket such that the at least one catch member is pivotable relative to the at least one bracket.