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An error-proof limit method for aircraft three-position switch

A three-position switch and limit technology, used in electrical switches, electrical components, circuits, etc., can solve problems such as system work disorder, economic loss, casualties, etc., to meet delay, prevent misoperation, and improve reliability. Effect

Active Publication Date: 2017-10-31
XI'AN AIRCRAFT INTERNATIONAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the three-position switch is used directly, the system cannot be reset due to misoperation, which will lead to system work disorder, failure to correctly monitor the fire source and implement fire extinguishing, resulting in economic losses and casualties

Method used

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  • An error-proof limit method for aircraft three-position switch
  • An error-proof limit method for aircraft three-position switch
  • An error-proof limit method for aircraft three-position switch

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Embodiment Construction

[0014] See attached picture, figure 1 It is a three-position switch on the aircraft to indicate that the state handle 2 of the three-position switch 1 can have three states. Pulling up is the first working state, pulling down is the second working state, and the middle position is the third. In order to ensure the safety of the aircraft and prevent misoperation of the three-position switch by the operator, the present invention provides an error-proof limit method for the three-position switch of the aircraft. First, there is a switch limit structure, including a limit knob 4 and the base 3, the limit knob 4 is a circular structural member, and two symmetrical turning handles 5 are provided on one side surface; there is a constraint hole 6 biased to one side in the middle of the limit knob, and the constraint hole The position and shape of 6 form a structural constraint on the switching path of the three-position switch state handle 2. At the front end of the constraint hole 6...

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PUM

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Abstract

The invention relates to an error-prevention limitation method for a three-position switch of an aircraft. A switch limitation structure comprises a limitation knob and a base, wherein a constraint hole is formed at the middle of the limitation knob and is biased towards one side, constraint on a state switching path of the three-position switch is formed due to the position and the shape of the constraint hole, a positioning steel ball of the limitation knob is matched with a round guide rail groove and a ball-socket shaped stop point of the base, the positioning steel ball moves along the guide rail groove on the surface of the base to be stopped at a required stop point by rotating the limitation knob, a state handle only can act in the constraint hole along a constraint direction, and thus, the function of error-prevention limitation is achieved.

Description

technical field [0001] The invention belongs to the field of aircraft electrical system design, and relates to an error-preventing and position-limiting method for a three-position switch that prevents the system from operating abnormally due to the misoperation of an operation switch on the aircraft. Background technique [0002] A switch is an electronic component that can open a circuit, interrupt the current flow, or allow it to flow to other circuits. Under the diverse needs, a variety of complex switch types are derived, especially in the field of aircraft electrical system design. The selection of the switch should not only consider the functions that the switch can realize, but also consider the safety and reliability of the switch, and should prevent the misoperation of the switch from the design level. [0003] The "work-check" switch used in the aircraft fire extinguishing system is a three-position selector switch with a neutral position. The system requires tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H9/00H01H9/02H01H9/16
CPCH01H9/00H01H9/02H01H9/16
Inventor 王佳怡周雨张志远傅方园夏丽
Owner XI'AN AIRCRAFT INTERNATIONAL
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