Turning-over action control circuit of bedsore-proof inflatable mattress

Abstract

The invention discloses a turning-over action control circuit of a bedsore-proof inflatable mattress. The turning-over action control circuit comprises a first non-steady state oscillator, a second non-steady state oscillator, a single-pole double-throw analogue switch, a first solid-state relay and a second solid-state relay; an output end of the first non-steady state oscillator is electrically connected with a public end of the single-pole double-throw analogue switch; the output end of the second non-steady state oscillator is electrically connected with a control end of the single-pole double-throw analogue switch; a normally open end of the single-pole double-throw analogue switch is electrically connected with a positive electrode of the control end of the first solid-state relay; a normally closed end of the single-pole double-throw analogue switch is electrically connected with the positive electrode of the control end of the second solid-state relay; a negative electrode of a controlled end of the first solid-state relay and the negative electrode of the controlled end of the second solid-state relay are connected with the positive electrodes of solenoid valves on a left side pipeline and a right side pipeline on the inflatable mattress respectively in a one-one correspondence manner. The turning-over action control circuit of the bedsore-proof inflatable mattress can realize alternate inflation and deflation, and lying and resting functions of a left side air path and a right side air path of the bedsore-proof inflatable mattress.

Description

technical field [0001] The invention belongs to an anti-decubitus bed, and in particular relates to a turning action control circuit of an anti-decubitus inflatable mattress. Background technique [0002] Bed sores are a common ailment faced by critically ill patients. To reduce the incidence of this disease, anti-decubitus beds were invented. There are two control methods for the existing anti-decubitus beds: manual control and automatic control. The former requires nursing staff to time the turning action control parts of the bed body, and the latter generally uses an automatic control unit to control the turning action. The automatic control unit has two forms, one uses a single-chip microcomputer as the core to control, such as a kind of intelligent nursing bed recorded in CN 105534657A, and a multifunctional anti-decubitus bed that turns over at regular intervals recorded in CN204618651U; Control, such as the alternating inflatable anti-decubitus mattress described in...

AI Technical Summary

Problems solved by technology

The advantage of the single-chip microcomputer control method is that the time for controlling the turning over can be adjusted arbitrarily, but the disadvantage is that the circuit design is complicated, it is necessary to write a single-chip microcomputer program, and it is difficult to maintain later

The advantage of the bistable control circuit is that the circuit design is simple, no programming is required, and the maintenance is simple. The disadvantage is that it can only realize that one side is full of air and the other side starts to inflate immediately, which does not meet actual needs.

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