Seat Support Disc Lock-Release Mechanism With Single-Motor Drive
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Solution Overview
Problem
Conventional seat member movable devices require two motors for operation, leading to a complex structure, increased number of components, and weight.
Innovation Solution
A seat member movable device with a drive unit and restraining unit, utilizing a single motor to move a support disc through a pinion and lifting/lowering shaft, and a restraining mechanism with interlocking gears to control the movement of the support disc, reducing the number of components and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two motors are used to control the rotary member, then the seat member can be moved and fixed, but the structure becomes complicated and the weight increases
Solution Approach 1:
The patent combines the functions of two separate motors into a single motor system. The lifting/lowering shaft integrates both the drive function (through the pinion gear) and the locking function (through the spiral groove engagement with the guide), eliminating the need for separate unlocking motor and drive motor while achieving the same operational reliability
Solution Approach 2:
The lifting/lowering shaft serves multiple functions simultaneously: it acts as a drive shaft that rotates to move the pinion, as a locking mechanism through the spiral groove guide interaction, and as a structural support element. This multi-functionality replaces the specialized functions of two separate motors
2Reliability
If two motors are used to control the rotary member, then the seat member can be moved and fixed, but the number of components increases
Solution Approach 1:
The patent merges the unlocking motor and drive motor into a single motor unit. The motor drives the lifting/lowering shaft, which through its interaction with the pinion gear and spiral groove guide, accomplishes both the unlocking and driving functions that previously required two separate motors
Solution Approach 2:
The patent extracts the essential function from two motors and consolidates it into one motor system. By removing the redundant motor components while retaining the core functionality through the lifting/lowering shaft mechanism, the number of components is reduced
3Reliability
If two motors are used to control the rotary member, then the seat member can be moved and fixed, but the weight increases
Solution Approach 1:
The patent combines two motor assemblies into a single motor unit, directly reducing the weight contribution from the motor components themselves. The integrated lifting/lowering shaft mechanism replaces the weight of two separate motor assemblies while maintaining the same functional capability
Solution Approach 2:
The patent removes the redundant motor components and their associated mounting structures, wiring, and control elements. By extracting only the essential driving function and implementing it through a single motor with the lifting/lowering shaft mechanism, the overall weight of the drive mechanism is reduced
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 device achieves a simpler structure and lighter weight by using a single motor to switch between restrained and unrestrained states of the support disc, enhancing operational efficiency and reducing complexity.
Implementation Method 1
The spring connects the first plate-shaped member and the second plate-shaped member, and applies a force that brings the first plate-shaped member closer to the second plate-shaped member
Implementation Method 2
The lifting/lowering shaft has a support portion in which a spiral groove is formed. An insertion hole into which the lifting/lowering shaft is inserted is formed at a center of the pinion, and on an inner circumferential surface defining the insertion hole, a guide corresponding to the spiral groove formed in the support portion is formed
Implementation Method 3
The interlocking gear connects the first plate-shaped member and the second plate-shaped member, and is formed to transmit movement of one of the first plate-shaped member and the second plate-shaped member closer to or away from another thereof, to the other thereof
Data Source
AI summary
A seat member movable device that moves a seat member with respect to a placement base, the seat member movable device including a support disc that supports the seat member, a base that supports the support disc so as to be movable with respect to the placement base, and a drive device that moves the support disc. In a restrained state in which movement of the support disc is restrained by a restraining unit, as a lifting/lowering shaft is rotated by driving of a motor, a pinion moves in a first direction, and moves one of a first plate-shaped member and a second plate-shaped member in a direction away from the other thereof, to release the restrained state by the restraining unit.