CN111728791B - Electric hospital bed with delayed automatic braking function and delayed automatic braking method - Google Patents
Electric hospital bed with delayed automatic braking function and delayed automatic braking method Download PDFInfo
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- CN111728791B CN111728791B CN202010775609.1A CN202010775609A CN111728791B CN 111728791 B CN111728791 B CN 111728791B CN 202010775609 A CN202010775609 A CN 202010775609A CN 111728791 B CN111728791 B CN 111728791B
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- push rod
- electric push
- brake
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- automatic braking
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000003111 delayed effect Effects 0.000 title claims description 10
- 230000006698 induction Effects 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 235000004443 Ricinus communis Nutrition 0.000 description 12
- 238000010586 diagram Methods 0.000 description 5
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/05—Parts, details or accessories of beds
- A61G7/0528—Steering or braking devices for castor wheels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B33/00—Castors in general; Anti-clogging castors
- B60B33/0078—Castors in general; Anti-clogging castors characterised by details of the wheel braking mechanism
- B60B33/0094—Castors in general; Anti-clogging castors characterised by details of the wheel braking mechanism actuated automatically
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- Health & Medical Sciences (AREA)
- Nursing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Invalid Beds And Related Equipment (AREA)
Abstract
The invention relates to an electric sickbed with a time-delay automatic braking function and a time-delay automatic braking method, which solve the technical problems that the stability of the sickbed is reduced and danger is caused when the caster is forgotten to lock under the condition of manual operation of casters of the existing electric sickbed, and comprise a bed body underframe and a time-delay automatic braking device, wherein the bed body underframe is connected with a front foot-operated braking caster and a rear foot-operated braking caster, the time-delay automatic braking device comprises an electric push rod, an electric push rod support, a starting position spring sheet type micro switch, a final position spring sheet type micro switch, a magnetic induction sensor, a brake connecting rod, a brake hook, a brake handle component, a magnetic block, a front connecting arm and a rear connecting arm, wherein the electric push rod comprises a motor and a telescopic part, the electric push rod support is fixedly connected with a bed body underframe, the electric push rod is connected with the electric push rod support, and the starting position spring sheet type micro switch and the final position spring sheet type micro switch are respectively connected with the electric push rod support. The invention is widely applied to the technical field of medical appliances.
Description
Technical Field
The invention relates to medical equipment in the technical field of medical equipment, in particular to an electric sickbed with a delayed automatic braking function and a delayed automatic braking method.
Background
Along with the continuous improvement of medical conditions, the use of electric sick bed increases gradually, and the bed body chassis of sick bed installs mechanical truckle for the mobile use of convenient transfer disease and sick bed, needs operating personnel to carry out the unblock of sick bed truckle through stepping on the pedal switch, locks. In the prior art, for the control of a brake part, medical staff is required to manually operate, pedal or manually lock the sickbed casters, and more intelligent and humanized designs are lacked. However, manual operation is needed during each braking, and the sickbed has a small deviation during operation, so that the stability of the sickbed is reduced; meanwhile, if the locking casters are forgotten by accidental errors, the sickbed can be moved to cause danger if a patient gets out of the bed or the ground is uneven.
Disclosure of Invention
The invention provides an electric sickbed with a time-delay automatic braking function and a time-delay automatic braking method, and aims to solve the technical problem that the stability of the sickbed is reduced and danger is caused when the casters are forgotten to lock under the condition of manual operation of casters of the existing electric sickbed.
The invention provides an electric sickbed with a time-delay automatic braking function, which comprises a bed body underframe, wherein a front foot-operated brake castor and a rear foot-operated brake castor are connected to the bed body underframe, the rear foot-operated brake castor is provided with a rear foot pedal and rear hexagonal steel, the front foot-operated brake castor is provided with a front foot pedal and front hexagonal steel, the electric sickbed with the time-delay automatic braking function also comprises a time-delay automatic braking device, the time-delay automatic braking device comprises an electric push rod, an electric push rod bracket, a starting position spring type micro-switch, a final position spring type micro-switch, a magnetic induction sensor, a brake connecting rod, a brake hook, a brake handle part, a magnetic block, a front connecting arm and a rear connecting arm, the electric push rod comprises a motor and a telescopic part, the electric push rod bracket is fixedly connected with the electric push rod bracket, the starting position spring type micro-switch is connected with the electric push rod bracket, the end position spring type micro-switch is far away from the motor of the electric push rod, the magnetic induction sensor is fixedly connected with the bed body underframe, the brake part is fixedly connected with the brake handle part of the electric push rod, the front connecting arm is fixedly connected with the front connecting arm and the rear connecting arm is fixedly connected with the front end of the front connecting arm and the rear connecting arm through a telescopic pin;
The controller comprises an STM32F103C8T6 chip, the magnetic induction sensor is connected with the base electrode of the triode Q4 through a resistor R24, the emitter electrode of the triode Q4 is grounded, the collector electrode pull-up resistor R22 of the triode Q4 is connected with 3.3V voltage, and the collector electrode of the triode Q4 is connected with the 40 th pin of the STM32F103C8T6 chip; the starting position spring piece type micro-switch is connected with the base electrode of the triode Q3 through a resistor R21, the emitter electrode of the triode Q3 is grounded, the collector electrode pull-up resistor R19 of the triode Q3 is connected with 3.3V voltage, and the collector electrode of the triode Q3 is connected with the pin 41 of the STM32F103C8T6 chip; the end position spring leaf type micro-switch is connected with the base electrode of the triode Q5 through a resistor 27, the emitter electrode of the triode Q5 is grounded, the collector electrode pull-up resistor R25 of the triode Q5 is connected with 3.3V voltage, and the collector electrode of the triode Q5 is connected with the 42 pin of the STM32F103C8T6 chip.
The invention also provides a delay automatic braking method of the electric sickbed with the delay automatic braking function, which comprises the following steps:
step S101, an STM32F103C8T6 chip reads an external alternating current signal;
Step S102, judging whether alternating current is accessed by an STM32F103C8T6 chip, if so, entering step S103;
step S103, the STM32F103C8T6 chip reads the Lock_Status signal;
Step S104, the STM32F103C8T6 chip judges whether the lock_status signal is at a high level, namely judges whether the caster is in a locking state, if not, the step S105 is entered;
Step S105, after 60 seconds of delay, the STM32F103C8T6 chip controls a motor of the electric push rod to reversely rotate, a telescopic part of the electric push rod is retracted, and the telescopic part of the electric push rod drives the brake connecting rod to move forwards, so that the front foot-operated brake castor and the rear foot-operated brake castor are in a braking state; until the telescopic part of the electric push rod touches the spring plate of the spring plate type micro switch at the starting position, namely the STM32F103C8T6 chip reads that the starting position signal start_actitions is low level, and simultaneously the brake state lock_status signal is high level, at the moment, the STM32F103C8T6 chip controls the motor of the electric push rod to stop reversing, at the moment, the system is in a brake state and the telescopic part of the electric push rod is completely retracted;
Step S106, after 2 seconds of delay, the STM32F103C8T6 chip drives the motor of the electric push rod to rotate forwards, the telescopic part of the electric push rod moves backwards, the brake handle component moves backwards, the brake hook and the brake handle component are tripped until the telescopic part of the electric push rod touches the spring plate of the spring plate type micro-switch at the End position, namely, the STM32F103C8T6 chip reads the End position signal end_Status to be at a low level, and at the moment, the STM32F103C8T6 chip controls the motor of the electric push rod to stop rotating forwards, namely, the extending action is stopped, and the system completes the whole automatic braking process.
The invention has the beneficial effects that the mechanical castor has a time-delay automatic locking function, and after locking, the sickbed can be effectively prevented from moving by an unmanned person, so that the safety of patients is protected. The automatic delay brake is realized under the scene of connecting alternating current, and the danger caused by the influence of misoperation on the unlocking of a sickbed is avoided.
Further features of the invention will be apparent from the description of the embodiments that follows.
Drawings
FIG. 1 is a schematic illustration of a foot brake caster of an electric hospital bed in a locked state;
FIG. 2 is a schematic view of the structure of the automatic delay brake in FIG. 1;
FIG. 3 is a schematic illustration of the connection of the time-lapse automatic brake device to the foot-operated brake casters in the configuration of FIG. 1;
FIG. 4 is a circuit diagram of a controller;
FIG. 5 is a circuit diagram of an external AC power access;
FIG. 6 is a motor drive circuit diagram of the electric putter;
FIG. 7 is a circuit diagram of a magnetic induction sensor connected to a controller;
FIG. 8 is a circuit diagram of the starting position spring-plate type micro-switch and the end position spring-plate type micro-switch respectively connected with the controller;
fig. 9 is a flowchart of a time-lapse automatic braking process.
The symbols in the drawings illustrate:
1. the electric bicycle comprises a bed body underframe, an electric push rod, 2-1, a motor, 3, a starting position spring sheet type micro-switch, 4, an electric push rod support, 5, an end position spring sheet type micro-switch, 6, a spring sheet type micro-switch support, 7, a magnetic induction sensor, 8, a brake connecting rod, 9, a brake hook, 10, a brake handle component, 11, a magnetic block, 12, a rear foot pedal, 13, front hexagonal steel, 14, rear hexagonal steel, 15, a front connecting arm, 16, a rear connecting arm, 17, a front pin shaft and 18, a rear pin shaft.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1-3, the electric sickbed with the time-delay automatic braking function comprises a bed body underframe 1, wherein a front foot-operated braking trundle and a rear foot-operated braking trundle are connected to the bed body underframe 1, the two sets of foot-operated braking trundles are in the prior art, the rear foot-operated braking trundle is provided with a rear foot pedal 12 and a rear hexagonal steel 14, and a medical staff can pedal the rear foot pedal 12 (simultaneously, the rear hexagonal steel 14 rotates) to lock or unlock the rear foot-operated braking trundle; the front foot brake castor is provided with a front foot pedal and a front hexagonal steel 13. The technical scheme of the invention is to improve the braking structure part of the caster on the basis of the existing electric sickbed, and add a delay automatic braking device.
The time-delay automatic braking device comprises an electric push rod 2, an electric push rod support 4, a starting position spring sheet type micro switch 3, a final position spring sheet type micro switch 5, a spring sheet type micro switch support 6, a magnetic induction sensor 7, a brake connecting rod 8, a brake hook 9, a brake handle component 10, a magnetic block 11, a front connecting arm 15, a rear connecting arm 16, a front pin 17 and a rear pin 18, wherein the electric push rod 2 comprises a motor 2-1 and a telescopic part, the electric push rod support 4 is fixedly connected with a bed underframe 1, the electric push rod 2 is arranged on the electric push rod support 4, the starting position spring sheet type micro switch 3 is connected with the electric push rod support 4 through a connecting support, the starting position spring sheet type micro switch 3 is close to the motor 2-1 of the electric push rod 2, the final position spring sheet type micro switch 5 is connected with the electric push rod support 4 through the spring sheet type micro switch support 6, the final position spring sheet type micro switch 5 is far away from the motor 2-1 of the electric push rod 2, the magnetic induction sensor 7 is fixedly arranged on the bed underframe 1, the handle component 10 is fixedly connected with the telescopic part of the electric push rod 2 (the electric push rod 2 can drive the brake component 10 to move linearly by driving the brake connecting rod 2 to the front pin 16, the brake hook 8 is fixedly connected with the rear pin 8, and the front pin 8 is fixedly connected with the rear connecting rod 8 through the front and the rear pin 16, and the six-shaped arm is fixedly connected with the front end of the front pin 8 and the front pin 16 is fixedly connected with the front end of the front arm 8. When the brake handle part 10 moves forwards, the brake hook 9 (the brake hook 9 is hooked on the brake handle part 10) can be pushed, and the brake connecting rod 8 moves forwards.
In fig. 2, the magnetic block 11 triggers the magnetic induction sensor 7 in the positional relationship between the magnetic block 11 and the magnetic induction sensor 7.
The controller selects STM32F103C8T6 chip.
The external alternating current power supply is connected with the main power interface J1, an ADC pin of the STM32F103C8T6 chip is selected as a signal input pin, the type of the input voltage is judged by comparing the amplitude of the input voltage, and a node between the resistor R1 and the resistor R2 is connected with an 11 th pin of the STM32F103C8T6 chip. The 3.3V voltage stabilizing tube is needed to be added to protect the MCU pin, and the RC filter circuit is needed to be added to improve the reliability of signals.
The magnetic induction sensor 7 is connected with the base electrode of the triode Q4 through a resistor R24, the emitter electrode of the triode Q4 is grounded, the collector electrode pull-up resistor R22 of the triode Q4 is connected with 3.3V voltage, the collector electrode of the triode Q4 is connected with the 40 th pin of the STM32F103C8T6 chip, and the 40 th pin of the STM32F103C8T6 chip receives a lock_status signal.
The forward and reverse rotation of the motor is realized through the switch combination of the two relays JK1 and JK 2. The STM32F103C8T6 chip outputs a PWM1_ BrakeActuators signal, and the STM32F103C8T6 chip outputs REM1_1 and REM2_1 signals, which are inverted through the Darlington pipe chip ULN 2003. The obtained M1_1 and M2_1 signals control the switch of two relays (SRD-05 VDC-SL-C) of JK1 and JK 2; signal isolation and amplification are carried out through an NPN triode MMBT3904-7-F and a MOS tube CSD88539ND, so that the control of the motor rotation speed is realized.
The starting position spring sheet type micro switch 3 is connected with the base electrode of the triode Q3 through a resistor R21, the emitter electrode of the triode Q3 is grounded, the collector electrode pull-up resistor R19 of the triode Q3 is connected with 3.3V voltage, the collector electrode of the triode Q3 is connected with the 41 pin of the STM32F103C8T6 chip, and the 41 pin of the STM32F103C8T6 chip receives a starting position signal Start_actioner. The End position spring sheet type micro-motion switch 5 is connected with the base electrode of the triode Q5 through a resistor R27, the emitter electrode of the triode Q5 is grounded, the collector electrode pull-up resistor R25 of the triode Q5 is connected with 3.3V voltage, the collector electrode of the triode Q5 is connected with the 42 pin of the STM32F103C8T6 chip, and the 42 pin of the STM32F103C8T6 chip receives an End position signal end_Status.
Referring to fig. 9, the following describes the operation of the time-lapse automatic brake:
in step S101, the STM32F103C8T6 chip reads the external ac signal.
Step S102, the STM32F103C8T6 chip judges whether alternating current is connected or not, and if so, the step S103 is entered.
In step S103, STM32F103C8T6 chip reads the Lock_Status signal.
Step S104, the STM32F103C8T6 chip judges whether the lock_status signal is at a high level, namely judges whether the caster is in a locking (braking) state, if not, the step S105 is entered, and if so, the step S107 is entered; the Lock Status signal being high indicates that the caster is in a braked state and the Lock Status signal being low indicates that the caster is in an unlocked (non-braked) state.
Step S105, after 60 seconds of delay, the STM32F103C8T6 chip controls the motor 2-1 of the electric push rod to reverse, the telescopic part of the electric push rod is retracted, the telescopic part of the electric push rod drives the brake connecting rod 8 to move forwards, and the brake connecting rod 8 drives the front hexagonal steel 13 and the rear hexagonal steel 14 to rotate, so that the front foot-operated brake castor and the rear foot-operated brake castor are in a braking state; until the telescopic part of the electric putter touches the spring plate of the spring plate type micro switch 3 at the starting position (namely, the STM32F103C8T6 chip reads that the push starting position signal Start_actitioner is at a low level), the brake state lock_status signal is at a high level, at the moment, the STM32F103C8T6 chip controls the motor of the electric putter to stop reversing, at the moment, the system is in a brake state, and the telescopic part of the electric putter is completely retracted.
Step S106, the STM32F103C8T6 chip drives the motor of the electric push rod to rotate forwards after 2 seconds of delay, the telescopic part of the electric push rod moves backwards, the brake handle component 10 moves backwards, the brake hook 9 and the brake handle component 10 are tripped, the front foot brake castor and the rear foot brake castor are still in braking states at the moment, until the telescopic part of the electric push rod touches the spring sheet of the spring sheet type micro switch 5 at the End position (namely, the STM32F103C8T6 chip reads the End position signal end_Status to be at a low level), at the moment, the STM32F103C8T6 chip controls the motor of the electric push rod 2 to stop rotating forwards, namely, the extending action is stopped, and the system completes the whole automatic braking process.
In step S107, the STM32F103C8T6 chip reads the end_status signal.
In step S108, if the end_status signal is low and the lock_status signal is high, the system is in a braking state. If the End-position signal end_status is high level, the STM32F103C8T6 chip drives the motor of the electric push rod to rotate forward until the telescopic part of the electric push rod touches the spring plate of the spring plate type micro-switch 5 at the End position.
The invention realizes that the sickbed not only maintains the function of manually unlocking and locking the mechanical casters. Meanwhile, the newly added automatic braking function can ensure the safety of the patient when the patient uses the sickbed to the greatest extent, simplify the operation flow of medical staff on the sickbed and strive for more rescue time for the patient.
The invention and its embodiments have been described above by way of illustration and not limitation, and the invention is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one skilled in the art is informed by this disclosure, other configurations of parts, driving devices and connection modes are adopted without creatively designing similar structures and embodiments without departing from the spirit of the present invention, and the present invention shall not be limited by the scope of the present invention.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010775609.1A CN111728791B (en) | 2020-08-05 | 2020-08-05 | Electric hospital bed with delayed automatic braking function and delayed automatic braking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010775609.1A CN111728791B (en) | 2020-08-05 | 2020-08-05 | Electric hospital bed with delayed automatic braking function and delayed automatic braking method |
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| Publication Number | Publication Date |
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| CN111728791A CN111728791A (en) | 2020-10-02 |
| CN111728791B true CN111728791B (en) | 2024-11-26 |
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| CN202010775609.1A Active CN111728791B (en) | 2020-08-05 | 2020-08-05 | Electric hospital bed with delayed automatic braking function and delayed automatic braking method |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212395245U (en) * | 2020-08-05 | 2021-01-26 | 威海威高齐全医疗设备有限公司 | Electric hospital bed with delayed automatic braking function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2892593Y (en) * | 2005-07-13 | 2007-04-25 | 唐合法 | Automatic intelligent braking device for motor vehicle |
| US9456938B2 (en) * | 2014-11-11 | 2016-10-04 | Ferno-Washington, Inc. | Powered ambulance cot with an automated cot control system |
| CN204840031U (en) * | 2015-06-27 | 2015-12-09 | 河北普康医疗设备有限公司 | Wheel brake equipment for medical bed |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212395245U (en) * | 2020-08-05 | 2021-01-26 | 威海威高齐全医疗设备有限公司 | Electric hospital bed with delayed automatic braking function |
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