Compound Operation Input Device Erroneous Depression Prevention
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Solution Overview
Problem
Conventional compound operation input devices fail to effectively prevent erroneous operations, as the existing erroneous operation preventing mechanisms are inadequate in preventing depression of the operating lever from positions other than the predetermined position, leading to potential misinterpretation of input signals.
Innovation Solution
The device incorporates a protrusion on the operating lever that abuts against an abutting portion of the body, preventing depressing movements from unintended positions, and allows for versatile operation by enabling depressing movements from multiple predetermined positions using a single press switch, thereby simplifying the internal structure and enhancing versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the erroneous operation preventing means uses abutment of shoulders against outside edges of the body, then depression from swung positions is prevented, but depression from predetermined position cannot be detected reliably
Solution Approach 1:
The operating lever is divided into functionally distinct parts: a basal portion for depressing detection and a distal portion with a protrusion for swing detection. The body is similarly segmented with separate detection mechanisms - the press switch vertex detects depression while the abutting portion with recess detects swing position. This segmentation allows each component to perform its specific function without interference, resolving the contradiction between preventing erroneous operations and enabling reliable depression detection.
Solution Approach 2:
The protrusion on the operating lever acts as an intermediary element that mediates between the lever's swing motion and the body's abutting portion. When the lever swings to a predetermined position, the protrusion engages with the recess in the abutting portion, serving as a mechanical intermediary that reliably signals the correct position for depression without interfering with the basal portion's ability to press the press switch vertex.
2Adaptability or versatility
If multiple stationary contacts are provided to detect depressing movements from multiple predetermined positions, then versatility is improved, but device complexity increases
Solution Approach 1:
The press switch vertex serves as a universal detection point for all depressing movements regardless of which predetermined position the lever originates from. The abutting portion with its recesses provides the position-specific guidance, while the press switch provides universal depression detection. This multi-functional arrangement allows a single press switch to detect depression from multiple predetermined positions, achieving versatility without increasing the number of stationary contacts.
Solution Approach 2:
The invention merges the position detection function (handled by the abutting portion with multiple recesses) and the depression detection function (handled by the single press switch vertex) into a unified mechanism. The protrusion engages with different recesses based on swing position, and the same press switch vertex detects depression from all positions, combining multiple functions into fewer components and reducing overall device complexity.
3Adaptability or versatility
If the operating lever is made swingable relative to the press switch vertex, then versatility is improved, but the structure becomes more complex
Solution Approach 1:
The operating lever is designed with dynamic characteristics, allowing it to swing between predetermined positions and also be depressed from those positions. The lever's ability to perform both rotational (swing) and linear (depression) motions from the same mounting structure provides versatility. The basal portion's ability to press the press switch vertex while the lever is in different swung positions enables multiple operation modes without requiring separate mechanisms for each type of motion.
Data Source
Figure 1(a)~1(c)
Figure 2
Figure 3
AI summary
The present invention provides a compound operation input device capable of blocking depression of an operating lever from a position other than a predetermined position. The device includes an operating lever 200 held in a body 100, adapted to swing from a predetermined position and to make first and second depressing movements from the predetermined position; a pressing member 500 disposed below the operating lever 200 and including a head 512 movable in response to a depressing movement of the operating lever 200, and a press switch 600 adapted to be turned on in two phases by being pressed by the head 512 of the pressing member 500. An arcuate wall 160 (abutting portion) of the body has a recess 162. When the operating lever 200 makes the second depressing movement from a position other than the predetermined position, a protrusion 240 of the operating lever 200 abuts against the arcuate wall 160. When the operating lever 200 makes the first or second depressing movements from the predetermined position, the protrusion 240 is received in the recess 162 of the arcuate wall 160.