Lawn Mower Handle Drive Mechanism for Sequential Operation
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Solution Overview
Problem
The existing lawn mower operation mechanisms require two successive and troublesome operations, making it difficult for operators to achieve excellent operability and stability, especially due to the placement of the push button on the left surface of the right long handgrip, which hinders quick and stable operation.
Innovation Solution
A drive-operating mechanism with a first operation member near the central portion of the grip part and a second operation member on the front side, allowing the operator to grasp and operate both with both hands, along with left and right travel levers for improved visibility and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the push button is provided on the left surface of the right long handgrip, then the operation can be performed with one hand, but the operator has difficulty seeing the push button and cannot quickly operate the lawn mower
Solution Approach 1:
The push button is relocated from the left surface of the right long handgrip to the rear surface of the operating switch case, which is positioned at the central portion of the grip part. This spatial repositioning places the push button in a location that is both easily visible to the operator and accessible while maintaining two-handed grip control.
2Productivity
If the operator uses the left hand to operate the lever directly after stretching out the right hand to depress the push button, then quick operation is achieved, but the lawn mower becomes unstable
Solution Approach 1:
The first operation member (push button) and second operation member (lever) are integrated into a unified operating mechanism where both are operated using the right hand while the left hand maintains grip on the grip part. This merging of operations into a coordinated two-handed sequence ensures both quick operation and lawn mower stability.
3Ease of operation
If the operator moves the right hand forward and rearward to operate the lever and grip part, then the lawn mower can be controlled, but it is difficult to sequentially and quickly perform two kinds of troublesome operation
Solution Approach 1:
The operating switch case is positioned at the central portion of the grip part, allowing the operator to perform preliminary actions (depressing the push button) while maintaining a stable two-handed grip. This preliminary positioning enables quick sequential operations without requiring the right hand to move forward and rearward, significantly reducing operation time.
Data Source
AI summary
A lawn mower, which is driven by an electric motor or an internal combustion engine, has an operation handle 80, which is formed by connecting through a grip part 82 rear ends of left and right long handgrips 81L, 81R extending rearward from the body of the lawn mower supported by wheels 6 and 7. A first operation member 84 is provided near a central portion of the grip part 82 of the operation handle 80, and a second operation member 85 is swingably supported by the operation handle 80. The second operation member 85 is arranged on the front side of the grip part 82 so as to freely move to and from the grip part 82. The lawn mower is driven by sequential operation of the first and second operation members 84, 85. Thus it is possible to constantly keep the lawn mower stable, enabling easy and quick operation, and improving operability.