Automatic bed sheet changing device
A technology of automatic replacement and equipment installation, applied in the field of medical equipment, can solve the problems of heavy workload and achieve the effect of reducing labor intensity, ingenious structure, and humanized structure
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Embodiment 2
[0035] Embodiment 2, on the basis of Embodiment 1, in order to make the process of changing the bed sheet more convenient, the hook and the tension hole of the invention are provided with corresponding marking codes, and the left side of the bed sheet and the corresponding tension hole are set to 1, Set the right side of the bed sheet and the corresponding tensioning hole to 2, and the four corners of the bed sheet and the corresponding tensioning hole to 3. When changing the bed sheet, the medical staff or patients can hang the hook on the corresponding Pull tight inside the hole.
Embodiment 3
[0036] Embodiment 3, on the basis of Embodiment 1, the tensioning motor control module is controlled by the single-chip microcomputer U3, and controls the tensioning and loosening of the tensioning rope of the bed sheet by controlling the positive and negative rotation of the tensioning motor, including an optocoupler When PC1 and optocoupler PC2 are tightened, the pin 40 of the single chip microcomputer U3 outputs a low level and connects to the pin 2 of the optocoupler PC1 through the low-voltage frequency converter, and the pin 1 of the optocoupler PC1 is connected to the power supply +5V through the resistor R12, and the optocoupler The pin 3 of PC1 is connected to the ground. At this time, the optocoupler is turned on, and the pin 4 of the optocoupler PC1 is connected to the base of the PNP transistor Q1 through the resistor R13. Since the emitter of the PNP transistor Q1 is connected to the power supply +5V, The collector of PNP transistor Q1 is at high level, connected t...
Embodiment 4
[0037] Embodiment 4. On the basis of Embodiment 1, the timing reminder module is used to send an instruction to the single-chip microcomputer when the set timing time arrives (generally twice a week, which can be set to 72H), and the single-chip microcomputer controls and sends a signal that the bed sheet needs to be replaced. After each replacement, the single-chip microcomputer controls, the time is reset to zero, and the time is reset, including the clock chip U4. Pin 1 and pin 2 of the clock chip U4 are external oscillators for high-precision timing. They are composed of crystal oscillator Y1, capacitor C1, and capacitor C2. The pin 4 of the clock chip U4 is connected to the ground, and the pin 3 of the clock chip U4 is an interrupt output terminal. When the set time is up, it outputs a low level to the single-chip microcomputer, and connects to the pin 9 of the single-chip microcomputer U3 after the pull-up resistor R7, and the clock The pin 5 of the chip U4 is the data te...
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