Electric Vehicle Seat with Retractable Base for Battery Access
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Solution Overview
Problem
In electric vehicles, the battery cannot be easily replaced or efficiently charged when the user is sitting on the seat, as the user's legs block the opening portion, hindering access to the battery compartment.
Innovation Solution
The electric vehicle features a mobile base with movable front and rear bases that adjust the wheelbase, allowing the seat to shift between sitting and retracted positions, and a receiving portion with an opening at the rear end for easy battery access, enabling efficient battery replacement and charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the opening portion is provided on the front surface side of the receiving compartment, then the battery can be taken in and out, but the user's legs block the opening portion when sitting, making battery replacement difficult
Solution Approach 1:
The patent introduces a new spatial dimension by adding a through hole in the backrest that communicates with the receiving compartment. This vertical dimension (from back to front through the backrest) provides an alternative access path that bypasses the horizontal blocking issue at the front opening, allowing battery access from the rear side when the user is seated.
2Ease of operation
If the seat is fixed in the sitting position, then the user can sit comfortably, but the battery cannot be accessed when the user is sitting
Solution Approach 1:
The patent segments the access path to the battery by creating a separate through hole in the backrest that is independent of the front opening. This segmentation allows dual access routes: the front opening for when the user is not seated, and the backrest through hole for when the user is seated, eliminating the need for complex seat movement mechanisms.
3Quantity of substance
If the receiving compartment is located under the seat, then the battery can be mounted, but the opening is blocked by user's legs when sitting
Solution Approach 1:
The backrest acts as an intermediary structure that provides access to the receiving compartment. The through hole in the backrest serves as a mediator that connects the external environment to the battery storage space without requiring direct access from the front opening that is blocked by the user's legs.
Data Source
AI summary
An electric vehicle includes: a mobile base capable of traveling by an electromotive drive; a seat including a seating portion having a sitting surface; and a battery capable of supplying electric power used in the electromotive drive. The seating portion of the seat includes a receiving portion capable of receiving the battery and arranged on a seat lower side with respect to the sitting surface. The mobile base is changeable between an expanded state in which a wheelbase is expanded and a contracted state in which the wheelbase is more contracted than in the expanded state. The seat is movable between a sitting position that the sitting surface faces a vehicle upper side in an expanded state of the mobile base, and a retracted position that the seating portion is retracted from the sitting position to a vehicle front side in a contracted state of the mobile base.