Pressure Switch Manual Reset Positioning Mechanism
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Solution Overview
Problem
Conventional manually reset type pressure switches experience slight offsets in their set values during the reset state, leading to reduced precision in operation, as the reset button's contact with the transmission means can alter the initial positioning of the pressure-sensitive element.
Innovation Solution
A pressure switch design that includes a positioning means to freely position the transmission element at an intermediate position between its forward and backward movement directions, allowing it to maintain the second state until released by a reset means, preventing offset and ensuring precise operation, including in the reset state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a reset button is provided to manually reset the pressure switch, then the pressure switch can be reset after abnormal pressure conditions, but the reset button's contact with the transmission means causes offset in the set value during reset state
Solution Approach 1:
The transmission means is segmented into a transmission element and a positioning element. The positioning element is separated from the transmission element and can independently engage with the reset button, preventing the reset button from directly contacting and offsetting the transmission element's set value.
Solution Approach 2:
The positioning element acts as an intermediary between the reset button and the transmission element. When the reset button is pressed, it contacts the positioning element which then moves the transmission element to the initial position, rather than the reset button directly contacting the transmission element.
2Ease of operation
If the reset button directly contacts the transmission means for resetting, then the reset operation is simple, but the initial position of the transmission element is offset from the set value
Solution Approach 1:
The transmission means is divided into distinct functional elements: a transmission element for value adjustment and a positioning element for reset positioning. This segmentation allows the reset button to contact the positioning element without offsetting the transmission element's precisely set value.
Solution Approach 2:
The positioning element is designed to automatically return the transmission element to its initial position when engaged by the reset button. This self-service mechanism ensures the transmission element is reliably repositioned without requiring complex external resetting mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The pressure switch operates more precisely by maintaining the set values for both the first and second positions, preventing offsets and ensuring accurate switching states, even after the reset, thus enhancing operational reliability.
Implementation Method 1
a pressure-sensitive element which partitions a low pressure chamber and a high pressure chamber and is configured to be deflected depending on a pressure variation in the high pressure chamber
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An objective of the present invention is to provide a manually reset type of pressure switch which operates more precisely, including the reset state. The objective is achieved by a pressure switch 1 includes a diaphragm 44 (pressure-sensitive element), a transmission element 62 for transmitting deflection thereof, a microswitch 3 (switching means) for switching its conductive state from a first state to a second state when the transmission element 62 is moved forward to a first position, wherein the microswitch 3 is configured to switch its conductive state from the second state to the first state when the transmission element 62 is moved backward to a second position which is located more backward than the first position, and a positioning means 9 for positioning the transmission element 62 in a forward/backward movement direction D11 to an intermediate position between the first position and the second position, a reset means 10 for releasing positioning the transmission element 62 by the positioning means 9 to bring the transmission element 62 into a free state in which the transmission element 62 is movable along the forward/backward movement direction D11.