Multidirectional Input Lever With Push-Stop Cover Structure
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Solution Overview
Problem
Conventional operation lever structures in construction machines cannot prevent damage to components during axial pushing operations, necessitating a solution to restrict the pushing operation amount to prevent damage.
Innovation Solution
A multidirectional input apparatus with a housing, operation member, and cover member that allows tilting and pushing operations while preventing excessive downward pushing by using a cover member that contacts the housing, thereby restricting the operation amount and preventing component damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operation member is allowed to be pushed into the housing without restriction, then the ease of operation is improved, but the reliability deteriorates due to potential damage to components such as magnetic sensors and electronic components
Solution Approach 1:
The cover member is pre-positioned to contact the housing at a specific location before any pushing operation occurs. This preliminary positioning establishes a mechanical stop that prevents the operation member from being pushed too far into the housing, thereby protecting internal components from damage while still allowing full intended operation range.
Solution Approach 2:
The cover member acts as an intermediary element between the operation member and the housing. It contacts the housing at a predetermined position and provides mechanical resistance to further pushing, serving as a protective mediator that prevents direct contact between the operation member and vulnerable internal components.
2Ease of operation
If the outer diameter of the spool pusher flange is made larger than the spool flange, then the ease of operation is improved, but the device complexity increases due to additional structural requirements
Solution Approach 1:
The cover member serves multiple functions: it acts as a protective cover for internal components, provides a mechanical stop to limit pushing operation, and contacts the housing to establish the operational boundary. By combining these functions into a single component, the design avoids additional complex structures while maintaining ease of operation.
Data Source
AI summary
A multidirectional input apparatus includes a housing including an opening portion; an operation member including an operation portion provided outside the housing and configured to be operated, and a shaft portion extending from the operation portion and inserted into the opening portion, the operation member being configured to receive an operation to be tilted with respect to the housing and an operation to be pushed into the housing; and a cover member that covers a portion surrounding the shaft portion, the cover member being configured to come into contact with the housing when the operation of pushing the operation member is performed.