Adjustable Exerciser Seat with Parallelogram Mechanism
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Solution Overview
Problem
Conventional cycle exercisers lack a stable and easy-to-adjust mechanism for the parallelogrammic structure relative to the supporting bases, requiring users to move away from the seat to adjust the structure, and lack support devices to secure the structure at desired heights or positions.
Innovation Solution
An exerciser design featuring a rotatable parallelogrammic supporting device with a first actuator and handle system allowing users to adjust the seat and seat back without leaving the seat, using a bolt-and-tube adjusting device or hydraulic/pneumatic actuators, and a remote control option for further convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a parallelogrammic structure is used to support the seat, then the seat can be adjusted to different positions, but the structure cannot be solidly secured to the supporting bases
Solution Approach 1:
The lock rod is pre-positioned with locking surfaces that engage with the supporting bases at predetermined locations. Before final adjustment, the lock rod is temporarily positioned to provide initial structural support, enabling the parallelogrammic structure to be securely attached to the bases while maintaining adjustability.
Solution Approach 2:
The lock rod acts as an intermediary component between the parallelogrammic structure and the supporting bases. It provides a mechanical connection that solidly secures the structure to the bases while allowing the seat to be adjusted to different positions through the parallelogrammic mechanism.
2Reliability
If a lock rod is used to secure the parallelogrammic structure, then the structure can be locked at selected heights, but users must move away from the seat to adjust it
Solution Approach 1:
The transmitting rod serves as a mediator that transfers the user's manual input force from the handle to the lock rod. This mechanical linkage allows users to operate the locking mechanism while remaining seated, converting rotational motion at the handle into linear motion that moves the lock rod to engage or disengage from the supporting bases.
Solution Approach 2:
The manual operation of the lock rod is replaced by a mechanical advantage system consisting of the handle and transmitting rod. Instead of requiring users to directly manipulate the lock rod, the system substitutes a leveraged mechanical connection that amplifies user force and enables easy operation from the seated position.
3Device complexity
If no support device is provided, then the structure is simple, but there is no device to secure the parallelogrammic structure at selected heights
Solution Approach 1:
The supporting bases are divided into multiple discrete locations with locking surfaces, and the lock rod is segmented with corresponding engagement features. This segmentation allows the structure to be secured at multiple selected heights while maintaining a relatively simple overall design, as each segment independently provides locking capability.
Solution Approach 2:
The lock rod is designed as a multi-functional component that can engage with any of the multiple locking surfaces on the supporting bases. This universal engagement capability allows a single simple device to provide height adjustment and securing functionality at multiple positions, eliminating the need for separate support devices for each height.
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 users to easily and securely adjust the seat and seat back to desired positions without leaving the exerciser, providing stable support and improved user experience through intuitive operation.
Implementation Method 1
a first actuator coupled between the parallelogrammic supporting device and the base, to adjustably support the parallelogrammic supporting device and thus the seat device to the base at selected position
Implementation Method 2
a first hand grip pivotally attached to the first handle, and coupled to the first actuator, to control the first actuator to adjust the parallelogrammic supporting device and the seat device relative to the base
Implementation Method 3
two bars rotatably attached on the base with pivot axles, and a rod pivotally secured to upper portions of the bars with pivot pins, to form a parallelogrammic structure
Data Source
AI summary
An exerciser includes a base, a parallelogrammic supporting device rotatably supported on the base, to allow the supporting device to be rotated and adjusted relative to the base to selected angular position, a seat device is disposed on the supporting device and adjustable relative to the base to selected position. The seat device includes a handle, an actuator coupled between the supporting device and the base, to adjustably support the supporting device and the seat device to the base. A hand grip is pivotally attached to the handle, and coupled to the actuator, to control the actuator, and to allow the users to operate the actuator without departing the seat device.