Omnidirectional Cart Handle Layout for Intuitive Sideways Control
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Solution Overview
Problem
Conventional carts with omnidirectional wheels are not suitable for easy operation in the width direction, as their handles are designed primarily for front-and-rear direction movement, lacking ergonomic features for efficient width direction navigation.
Innovation Solution
A cart design featuring a handle with a first portion extending in the width direction and a pair of second portions extending in the front-and-rear direction, equipped with sensors to detect loads and control the drive unit, allowing users to easily operate the cart in the width direction by grasping either second portion, improving ergonomics and operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the handle is designed as a single grip extending in the width direction, then the cart can be controlled in the front-and-rear direction, but it is not suitable for pushing and pulling the cart in the width direction
Solution Approach 1:
The handle is divided into multiple portions: a first portion extending in the width direction and a pair of second portions extending in the front-and-rear direction. This segmentation allows users to grasp different portions for different directional operations, enabling both front-and-rear and width direction control effectively.
Solution Approach 2:
The handle structure serves multiple functions: the first portion enables width direction pushing/pulling, while the pair of second portions enable front-and-rear direction control. This multi-functional design makes the single handle structure adaptable to various operational directions without requiring separate controls for each direction.
2Adaptability or versatility
If the handle extends only in the width direction, then width direction operation is enabled, but front-and-rear direction control becomes difficult
Solution Approach 1:
The handle is segmented into a first portion for width direction operations and a pair of second portions for front-and-rear direction operations. This segmentation ensures that each directional control requirement is met by the appropriate handle portion, maintaining ease of operation in both directions.
Solution Approach 2:
The handle structure extends in multiple dimensions: the first portion extends in the width direction while the second portions extend in the front-and-rear direction. This multi-dimensional configuration allows the handle to provide effective control leverage for operations in different directions simultaneously.
3Measurement precision
If sensors are placed to detect all load directions, then comprehensive control is achieved, but excessive load on sensors may occur without displacement regulation
Solution Approach 1:
The displacement regulation mechanism prevents excessive load from being applied to the sensors in the first place. By regulating the maximum displacement of the handle, the system proactively avoids conditions that would cause excessive sensor loading, thereby protecting sensor reliability while maintaining detection precision within the regulated range.
Solution Approach 2:
The control unit receives detection results from sensors that monitor loads in both width and front-and-rear directions, and regulates handle displacement based on this feedback. This closed-loop control ensures comprehensive load detection accuracy while preventing excessive sensor loading through active displacement regulation based on real-time sensor feedback.
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 effortless movement in the width direction with improved handle ergonomics, allowing users to intuitively operate the cart without discomfort, while preventing excessive load application on sensors through regulated displacement ranges.
Implementation Method 1
at least one sensor (6) configured to detect loads in a width direction and a front-and-rear direction of the vehicle body (2) applied to the handle (5)
Data Source
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AI summary
A cart includes a vehicle body, at least one omnidirectional wheel provided at the vehicle body and configured to move the vehicle body in all directions along a floor, a drive unit configured to drive the omnidirectional wheel, a handle provided at the vehicle body and configured to accept an operation by a user, at least one sensor configured to detect loads in a width direction and a front-and-rear direction of the vehicle body applied to the handle, and a control unit configured to control the drive unit based on the loads detected by the sensor, wherein the handle includes a first portion extending in the width direction and at least one second portion extending in a front-and-rear direction.