Handling Machine Control Device Thumb-Operated Joystick

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Solution Overview

Problem

Existing handling machines suffer from joystick control errors during digging and dumping operations, leading to safety hazards and material loss due to non-intuitive control movements and potential obstructions, which increase the risk of musculoskeletal disorders.

Innovation Solution

A control device with a joystick featuring a control element on its lateral side, allowing intuitive control of the handling device through thumb movements for digging and dumping operations, eliminating the need for lateral tilting and reducing the risk of errors and obstructions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the joystick control body is rotated laterally to control the handling device pivoting, then the handling device can be positioned for digging or dumping, but the control becomes non-intuitive and increases the risk of operator error

Engineering Contradiction:

Improveintuitiveness of controlVSAvoidrisk of handling errors

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent inverts the conventional control mapping by assigning digging/dumping functions to the thumb-operated control element instead of the joystick body rotation. This reversal makes the control more intuitive since the thumb's natural up/down movement directly corresponds to the handling device's digging/dumping motion, eliminating the non-intuitive lateral rotation required in traditional joysticks

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The control device is segmented into distinct functional zones: the joystick control body for lifting arm movements and a separate thumb-operated control element for handling device pivoting. This segmentation allows each control element to be optimized for its specific function, with the thumb element providing intuitive control for digging/dumping operations without the complexity of lateral joystick rotation

Inventive Principle:

Principle #1Segmentation

2Measurement precision

If the operator makes small test movements of the joystick to visually observe handling device movement, then control precision can be improved, but operation time and productivity are reduced

Engineering Contradiction:

Improvecontrol precisionVSAvoidoperation time

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent incorporates visual feedback mechanisms that allow the operator to observe handling device movement in real-time without requiring repeated test movements. The improved control element design provides more predictable and linear response characteristics, enabling the operator to achieve precise control in fewer movements, thereby reducing operation time while maintaining high control precision

Inventive Principle:

Principle #23Feedback

3Adaptability or versatility

If the joystick control body is rotated laterally for handling device control, then digging and dumping functions can be achieved, but lateral space requirements increase and obstructions may occur

Engineering Contradiction:

Improvecontrol functionalityVSAvoidlateral space requirement

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The patent transitions the control mechanism from lateral (horizontal) rotation to vertical movement by positioning the control element on the side of the joystick body and actuating it with thumb movements in the vertical direction. This dimensional change eliminates the need for lateral space while maintaining full digging and dumping functionality, as the vertical thumb movement directly controls the handling device pivoting

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentEP4493507B1Handling machine comprising a manually operable control device

Publication Date: 2025.12.31 MANITOU BF SA

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Figure 1A
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AI summary

The invention relates to a handling machine comprising a telescopic lifting arm and a handling device that pivots between an emptying position and a digging position; a processing unit and a control device (16) comprising a control body (160) that is manually operable to generate a control signal for pivoting the arm by pivoting the control body about a first axis (A1). A control member (17) that is operable using the thumb of the hand of the operator is located on one side of the control body and is mounted so as to pivot or slide about or along a second pivot or slide axis (A2) to generate a control signal for controlling the sliding of the second segment of the arm. The control member is also movably mounted so as to pivot or slide about or along a third pivot or slide axis (A3) to control the pivoting of the handling device.