Chair Metal Frame Integration for Stable Control Unit Attachment
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Solution Overview
Problem
Existing chair designs with integrated awakening devices face challenges in maintaining attachment strength, preventing heat-related operational slowdowns, and facilitating easy battery replacement or charging, particularly due to space constraints and entanglement issues with harnesses.
Innovation Solution
A chair configuration with a metal frame, a holding member attached to the frame, and a curved metal frame design to enhance rigidity, along with a projecting portion for heat dissipation and harness arrangement, allows for stable attachment and easy battery access while preventing entanglement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the control unit is attached to the lower surface of the cushion pan, then the chair structure is simplified, but the attachment strength is insufficient and the control unit may be removed when bumped
Solution Approach 1:
The patent transitions from attaching the control unit to the lower surface of the cushion pan (2D surface attachment) to integrating it into the metal frame structure (3D structural integration). The holding member is formed as an integral part of the metal frame, providing robust mechanical support and preventing displacement during use.
Solution Approach 2:
The patent combines the holding member with the metal frame to create a composite structure. The holding member is formed from the metal frame material itself, creating a unified structure that leverages the strength and rigidity of the metal frame to securely hold the control unit.
2Volume of moving object
If the battery and control device are kept together in the control unit, then the control unit becomes more compact, but heat generated causes operation speed to decrease
Solution Approach 1:
The patent separates the battery and control device into distinct locations. The control device is mounted on the metal frame away from the battery, allowing heat generated by the battery to dissipate independently and preventing thermal interference that would slow down control device operations.
Solution Approach 2:
The metal frame serves as an intermediary structure that physically separates the battery and control device while providing structural support. This intermediate positioning allows for thermal management and prevents heat accumulation that would affect operational speed.
3Device complexity
If the control unit is provided on the lower side of the seated portion, then the chair structure is simplified, but the user cannot easily replace or charge the battery
Solution Approach 1:
The patent extracts the battery from the control unit and positions it separately in the leg member. This allows the battery to be independently accessed and removed from the side of the chair, enabling users to easily replace or charge the battery without disassembling the control unit or moving the entire chair.
Solution Approach 2:
The patent changes the accessibility dimension for battery maintenance. Instead of requiring access from below the seated portion (vertical access), the battery is positioned in the leg member where it can be accessed from the side (lateral access), making it much easier for users to perform maintenance tasks.
4Ease of manufacture
If the holding member is attached to the cushion pan, then the attachment process is simplified, but the attachment state cannot be stably maintained
Solution Approach 1:
The patent merges the holding member with the metal frame, forming an integral structure. This combination ensures that the holding member becomes a permanent and stable part of the chair's load-bearing structure, eliminating concerns about attachment stability while maintaining ease of assembly through the modular design.
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 enhanced attachment strength and heat radiation properties improve the operational reliability and usability of the chair by maintaining stable device performance and simplifying battery maintenance.
Implementation Method 1
the metal frame is formed to be curved. With the above configuration, the metal frame whose rigidity is enhanced by forming the curved metal frame
Implementation Method 2
a space is formed between the battery or the control device and the metal frame... the space is formed between the metal frame and the one of the battery and the control device. Thereby, a heat radiation property becomes favorable
Data Source
AI summary
The present disclosure provides a chair in which attachment strength of a holding member and the chair is enhanced and an attachment state can be stably maintained. A legged chair includes a leg member, a support post connected to the leg member, a metal frame integrated with the support post, the metal frame forming a seated portion, an awakening device configured to awaken a seated person, a battery configured to supply electric power to the awakening device, an ECU that controls the awakening device, and a holding cover configured to hold the battery and the ECU. The holding cover is attached to the highly rigid metal frame.