CN111067736B - Back lifting mechanism for preventing clothes on back of patient from being pulled - Google Patents

Back lifting mechanism for preventing clothes on back of patient from being pulled Download PDF

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Publication number
CN111067736B
CN111067736B CN201911401487.3A CN201911401487A CN111067736B CN 111067736 B CN111067736 B CN 111067736B CN 201911401487 A CN201911401487 A CN 201911401487A CN 111067736 B CN111067736 B CN 111067736B
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push rod
electric push
patient
frame
pressure sensor
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CN111067736A (en
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李洪洲
孙丽霞
张其久
阴子昊
程智渠
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Beihua University
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Beihua University
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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
    • A61G7/065—Rests specially adapted therefor
    • A61G7/07—Rests specially adapted therefor for the head or torso, e.g. special back-rests
    • 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
    • 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
    • A61G2203/00—General characteristics of devices
    • A61G2203/70—General characteristics of devices with special adaptations, e.g. for safety or comfort

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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)
  • Invalid Beds And Related Equipment (AREA)

Abstract

The invention belongs to the technical field of rehabilitation nursing, and particularly relates to a back lifting mechanism for preventing clothes on the back of a patient from being pulled, which solves the problem that the clothes on the back of the patient are pulled by a back plate to cause discomfort in the back lifting process of the conventional nursing instrument; the connecting block is fixed on the lower surface of the back board; one end of the pull pressure sensor is in threaded connection with the connecting block, and the other end of the pull pressure sensor is in new connection with the electric push rod; the inclination angle sensor is fixed on the sitting frame; the sitting and standing outer frame is hinged with the bed body through a hinge; the slide block of the back board guide rail pair is fixed on the lower surface of the back board; the guide rails of the two back board guide rail pairs are fixed on the left frame and the right frame of the sitting frame.

Description

Back lifting mechanism for preventing clothes on back of patient from being pulled
Technical Field
The invention belongs to the technical field of rehabilitation nursing, and particularly relates to a back lifting mechanism for preventing the back clothes of a patient from being pulled.
Background
At present, no matter in hospitals, nursing homes, nursing centers or at home, the nursing apparatus is very commonly applied, and the labor of medical care personnel and family members of patients is reduced. However, the back plate pulls clothes on the back of the patient in the back lifting process of the existing nursing apparatus, so that the neck and the back of the patient are squeezed by the clothes, the patient is uncomfortable, even suffocation occurs, and the patient is more dangerous especially for the patient losing the exercise function. In order to solve the problems, the invention provides a back lifting mechanism for preventing the clothes on the back of a patient from being pulled.
Disclosure of Invention
The invention aims to solve the technical problem that the back plate pulls clothes of a patient to cause discomfort in the back lifting process of the existing nursing instrument, and provides a back lifting mechanism for preventing the clothes on the back of the patient from being pulled.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme, which is described by combining the accompanying drawings as follows:
a back lifting mechanism for preventing clothes on the back of a patient from being pulled comprises a back board (1), a connecting block (2), a pulling pressure sensor (3), an electric push rod (4), an inclination angle sensor (5), a hinge (6), a lifting outer frame (7), a back board guide rail pair (8), bedding (10) and a control system;
guide rails of the two back-board guide rail pairs (8) are fixed on left and right frames of the sitting outer frame (7) through bolts, and the axes of the guide rails of the two back-board guide rail pairs (8) are parallel to each other; the slide block of the back board guide rail pair (8) is fixed on the lower surface of the back board (1) through a bolt; the connecting block (2) is fixed on the lower surface of the backrest plate (1) through a bolt; one end of the pull pressure sensor (3) is connected with the connecting block (2) through threads; the other end of the pulling pressure sensor (3) is fixedly connected with the head of a pushing rod of the electric push rod (4) through threads; the other end of the electric push rod (4) is fixed on the lower frame of the sitting frame (7); the axis of the electric push rod (4) is collinear with the central line of the pull pressure sensor (3) and is parallel to the central line of the guide rail of the backboard guide rail pair (8); the bedding (10) is fixed on the upper surface of the backrest plate (1); the inclination angle sensor (5) is fixed on the sitting frame (7) through bolts;
the control system comprises a controller, an A/D conversion and isolation circuit and an optical isolation and drive circuit; draw pressure sensor (3) and tilt angle sensor (5) to articulate with AD conversion and isolator circuit's input port electric wire respectively, AD conversion and isolator circuit's delivery outlet and the input port electric wire hookup of controller, the delivery outlet and the optical isolation of controller and the hookup of drive circuit input port electric wire, the optical isolation and the hookup of drive circuit delivery outlet and electric putter (4) electric wire.
In the technical scheme, the sitting frame (7) is formed by welding an upper frame, a lower frame, a left frame and a right frame, and the upper frame, the lower frame, the left frame and the right frame are square tubes.
In the technical scheme, the lower end of the sitting frame (7) is hinged with a bed body (9) through a hinge (6);
the technical scheme is that the multifunctional electric chair further comprises a No. 2 electric push rod (11), and the end part of the No. 2 electric push rod (11) is hinged with a beam (12) of the sitting-up outer frame (7); the bottom of the No. 2 electric push rod (11) is hinged with the bed body (9);
in the technical scheme, the No. 2 electric push rod (11) is connected with an output port wire of an optical isolation and drive circuit.
The control algorithm in the technical scheme is as follows:
A. setting the angle of the axis of the electric push rod (4) and the upper surface of the bed body (9) in a vertical plane as alpha, wherein the sum of the mass of the backrest plate (1), the connecting block (2), the sliding blocks of the two backrest plate guide rail pairs (8) and the mass of the bedding (10) is m; the mass sum of the mass of the backrest plate (1), the connecting block (2), the sliding blocks of the two backrest plate guide rail pairs (8) and the bedding (10) and the component force of m in the direction of the center line of the tension and pressure sensor (3) is Fw which is mg multiplied by sin alpha; (ii) a Setting the low threshold value of the electric push rod (4) to be FD＝Fw-m0Wherein m is0Is sensitivity; setting the high threshold value of the electric push rod (4) to be FG ═ Fw+m0Wherein m is0Is sensitivity;
B. when the inclination angle sensor (5) detects that the angle of the backrest plate (1) is 0 degree, the electric push rod (4) is not moved;
C. when the back board (1) rotates, the tension and pressure sensor (3) detects the force value F of the connecting block (2) in the direction along the central line of the tension and pressure sensor (3); comparing F with FD、FGThe size of (d); when F is less than FDWhen the electric push rod (4) receives a control system signal, a push-out rod of the electric push rod (4) extends out to start to push the backrest plate (1) to move upwards; the electric push rod (4) continues to extend, and when F is larger than FDWhen the electric push rod (4) is not extended, the electric push rod is not extended; when F is greater than FGThe electric push rod (4) receives a control system signal, and a push rod of the electric push rod (4) retracts to drive the backrest plate (1) to move downwards; the electric push rod (4) continues to retract, and when F is smaller than FGWhen the electric push rod (4) is retracted, the electric push rod stops retracting;
the tension and pressure sensor (3) detects the force value F of the connecting block (2) in the direction along the central line of the tension and pressure sensor (3) in real time, and the step C is repeated, so that the backrest plate (1) can automatically adapt to the position change of the back of the patient in real time, and the back lifting process of the patient is comfortable;
sensitivity m in the technical scheme0The value range of (A) is 0.1kg-3 kg.
Compared with the prior art, the invention has the beneficial effects that:
1. the back lifting mechanism for preventing the clothes on the back of the patient from being pulled adopts the inclination angle sensor and the pulling pressure sensor to acquire the rotation angle of the back board and the friction force information between the back of the patient and the back board for real-time detection, and the control system controls the electric push rod to stretch so that the back board moves along with the back of the patient, thereby forming closed-loop control and solving the problem that the back board pulls the clothes of the patient to cause discomfort of the patient when the existing nursing instrument lifts the back.
2. The back lifting mechanism for preventing the patient from pulling back clothes adopts the inclination angle sensor to acquire the rotation angle of the back board and sets the variable threshold value which changes along with the change of the rotation angle of the back board, so that the problem of complex structure caused by the fact that a counter weight needs to be added when a fixed threshold value is set is solved, the structure is simplified, and the cost is reduced.
Drawings
The invention is further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic perspective view of a back lifting mechanism for pulling patient's back clothing according to the present invention;
FIG. 2 is a schematic view of the installation of a back lifting mechanism for pulling patient's back clothes according to the present invention;
FIG. 3 is a block diagram of a control system for a back lifting mechanism of a patient's back pull prevention garment according to the present invention;
in the figure: 1. the novel multifunctional bed comprises a backrest plate, 2 parts of a connecting block, 3 parts of a pulling pressure sensor, 4 parts of an electric push rod, 5 parts of an inclination angle sensor, 6 parts of a hinge, 7 parts of a sitting and standing outer frame, 8 parts of a backrest plate guide rail pair, 9 parts of a bed body, 10 parts of a bedding, 11.2 parts of an electric push rod and 12 parts of a beam.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
it should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention:
referring to fig. 1 and 2, the back lifting mechanism for preventing pulling back clothes of a patient comprises a back board 1, a connecting block 2, a pulling pressure sensor 3, an electric push rod 4, an inclination angle sensor 5, a hinge 6, a lifting outer frame 7, a back board guide rail pair 8, a bedding 10 and a control system;
referring to fig. 1 and 2, the guide rails of the two back-plate guide rail pairs 8 are fixed on the left and right frames of the sitting-up outer frame 7 through bolts, and the axes of the guide rails of the two back-plate guide rail pairs 8 are parallel to each other; the slide block of the back plate guide rail pair 8 is fixed on the lower surface of the back plate 1 through a bolt; the connecting block 2 is fixed on the lower surface of the back plate 1 through a bolt; one end of the pull pressure sensor 3 is connected with the connecting block 2 through threads; the other end of the pulling pressure sensor 3 is fixedly connected with the head of a push-out rod of the electric push rod 4 through threads; the other end of the electric push rod 4 is fixed on the lower frame of the sitting frame 7; the axis of the electric push rod 4 is collinear with the central line of the pull pressure sensor 3 and is parallel to the central line of the guide rail of the back plate guide rail pair 8; the bedding 10 is fixed on the upper surface of the backrest plate 1; the inclination angle sensor 5 is fixed on the sitting frame 7 through bolts;
referring to fig. 1, 2 and 3, the control system includes a controller, an a/D conversion and isolation circuit, and an optical isolation and driving circuit; draw pressure sensor 3 and tilt sensor 5 respectively with AD conversion and isolator circuit's input port electric wire hookup, AD conversion and isolator circuit's delivery outlet and the input port electric wire hookup of controller, the delivery outlet and the optical isolation of controller and drive circuit input port electric wire hookup, optical isolation and drive circuit delivery outlet and the 4 electric wire hookups of electric putter.
Referring to fig. 1 and 2, the sitting-up outer frame 7 is formed by welding an upper frame, a lower frame, a left frame and a right frame, and the upper frame, the lower frame, the left frame and the right frame are square tubes. The lower end of the sitting outer frame 7 is hinged with the bed body 9 through a hinge 6;
referring to fig. 1 and 2, the back lifting mechanism for preventing pulling back clothes of a patient further comprises a No. 2 electric push rod 11, and the end part of the No. 2 electric push rod 11 is hinged with a beam 12 of the sitting and standing outer frame 7; the bottom of the No. 2 electric push rod 11 is hinged with the bed body 9;
referring to fig. 1, 2 and 3, the number 2 electric push rod 11 is connected with an output port wire of an optical isolation and drive circuit.
A control algorithm of a back lifting mechanism for preventing the back of a patient from being pulled specifically comprises the following steps:
A. setting the angle of the axis of the electric push rod 4 and the upper surface of the bed body 9 in a vertical plane as alpha, and setting the sum of the mass of the backrest plate 1, the connecting block 2, the sliding blocks of the two backrest plate guide rail pairs 8 and the mass of the bedding 10 as m; the mass sum of the mass of the back board 1, the connecting block 2, the sliding blocks of the two back board guide rail pairs 8 and the bedding 10 and the component force of the mass m along the central line direction of the tension and pressure sensor 3 are FwMg × sin α; (ii) a The low threshold value of the electric putter 4 is set to FD＝Fw-m0Wherein m is0Is sensitivity; setting the high threshold value of the electric putter 4 to FG＝Fw+m0Wherein m is0Is sensitivity; the sensitivity m0The value range of (A) is 0.1kg-3 kg. The sensitivity m0Is a value reflecting a change in the frictional force between the patient's back and the backboard 1 when the sensitivity m is set0When the smaller the value of (1) is, the smaller the change of the friction force between the patient's back and the backboard 1, the electric push rod 4 will move in a telescopic way to drive the backboard 1 to move along with the patient's back.
B. When the inclination angle sensor 5 detects that the angle of the backrest plate 1 is 0 degree, the electric push rod 4 is not moved;
C. when the backrest plate 1 rotates, because the back of the patient equivalently rotates by taking the hip of the patient as a rotating shaft, and the backrest plate 1 rotates by taking the hinge 6 as the rotating shaft, because the two rotating shafts are not coaxial, the back of the patient generates a friction force to the backrest plate 1 in the back lifting process, and the friction force acts along the central line direction of the pull pressure sensor 3; at this time, the tension and pressure sensor 3 detects a change in the force value F of the coupling shoe 2 in the direction along the center line of the tension and pressure sensor 3; comparing F with FD、FGThe size of (d); when F is less than FDWhen the electric push rod 4 receives a control system signal, a push rod of the electric push rod 4 extends out to start to push the backboard 1 to move upwards; the electric push rod 4 continues to extend, and when F is larger than FDWhen the electric push rod 4 is extended, the electric push rod stops extending; when F is greater thanFGThe electric push rod 4 receives a control system signal, and the push rod of the electric push rod 4 retracts to drive the backboard 1 to move downwards; the electric push rod 4 continues to retract, when F is less than FGWhen the electric push rod 4 is retracted, the electric push rod stops retracting;
the tension and pressure sensor 3 detects the force value F of the connecting block 2 in the direction along the central line of the tension and pressure sensor 3 in real time, and the step C is repeated, so that the backrest plate 1 can automatically adapt to the position change of the back of the patient in real time, and the back lifting process of the patient is comfortable;
the working principle of the back lifting mechanism for preventing the clothes on the back of the patient from being pulled comprises the following steps:
when a patient lies on the upper surface of the body bed 9, the upper surface of the backboard 1 is in a horizontal state, namely the detection value of the inclination angle sensor 5 is 0, and the electric push rod 4 does not act; when a patient needs to get up, the No. 2 electric push rod 11 pushes the sickbed back-up unit which prevents pulling the clothes on the back of the patient to rotate anticlockwise, the pulling pressure sensor 3 detects a force value signal and feeds the force value signal back to the controller, according to the control algorithm of the invention, the controller controls the pushing out and retracting of the electric push rod 4 to drive the back board 1 to change along with the position change of the back of the patient, and the problem that the patient feels uncomfortable due to the pulling of the clothes on the back in the back-up process is solved.
The embodiments of the present invention are described in order to facilitate those skilled in the art to understand and apply the present invention, and the present invention is only an optimized embodiment or a preferred embodiment, so the present invention is not limited to the description of the embodiment. If the related technical personnel make equivalent structural changes or various modifications without creative efforts while adhering to the basic technical solution of the present invention, the protection scope of the present invention is covered.

Claims (6)

1. A back lifting mechanism for preventing the back clothes of a patient from being pulled is characterized by comprising a back board (1), a connecting block (2), a pulling pressure sensor (3), an electric push rod (4), an inclination angle sensor (5), a hinge (6), a lifting outer frame (7), a back board guide rail pair (8), a bedding (10) and a control system;
guide rails of the two back-board guide rail pairs (8) are fixed on left and right frames of the sitting outer frame (7) through bolts, and the axes of the guide rails of the two back-board guide rail pairs (8) are parallel to each other; the slide block of the back board guide rail pair (8) is fixed on the lower surface of the back board (1) through a bolt; the connecting block (2) is fixed on the lower surface of the backrest plate (1) through a bolt; one end of the pull pressure sensor (3) is connected with the connecting block (2) through threads; the other end of the pulling pressure sensor (3) is fixedly connected with the head of a pushing rod of the electric push rod (4) through threads; the other end of the electric push rod (4) is fixed on the lower frame of the sitting frame (7); the axis of the electric push rod (4) is collinear with the central line of the pull pressure sensor (3) and is parallel to the central line of the guide rail of the backboard guide rail pair (8); the bedding (10) is fixed on the upper surface of the backrest plate (1); the inclination angle sensor (5) is fixed on the sitting frame (7) through bolts;
the control system comprises a controller, an A/D conversion and isolation circuit and an optical isolation and drive circuit; the tension pressure sensor (3) and the tilt angle sensor (5) are respectively connected with input port wires of an A/D conversion and isolation circuit, an output port of the A/D conversion and isolation circuit is connected with input port wires of a controller, an output port of the controller is connected with input port wires of an optical isolation and drive circuit, and an output port of the optical isolation and drive circuit is connected with an electric push rod (4) through wires;
the control algorithm is as follows:
A. setting the angle of the axis of the electric push rod (4) and the upper surface of the bed body (9) in a vertical plane as alpha, wherein the sum of the mass of the backrest plate (1), the connecting block (2), the sliding blocks of the two backrest plate guide rail pairs (8) and the mass of the bedding (10) is m; the mass of the back board (1), the connecting block (2), the sliding blocks of the two back board guide rail pairs (8) and the bedding (10) and the component force of the mass m along the central line direction of the tension and pressure sensor (3) are FwMg × sin α; setting the low threshold value of the electric push rod (4) to be FD＝Fw-m0Wherein m is0Is sensitivity; setting a high threshold value of the electric push rod (4) to FG＝Fw+m0Wherein m is0Is sensitivity;
B. when the inclination angle sensor (5) detects that the angle of the backrest plate (1) is 0 degree, the electric push rod (4) is not moved;
C. when the back board (1) rotates, the tension and pressure sensor (3) detects the force value F of the connecting block (2) in the direction along the central line of the tension and pressure sensor (3); comparing F with FD、FGThe size of (d); when F is less than FDWhen the electric push rod (4) receives a control system signal, a push-out rod of the electric push rod (4) extends out to start to push the backrest plate (1) to move upwards; the electric push rod (4) continues to extend, and when F is larger than FDWhen the electric push rod (4) is not extended, the electric push rod is not extended; when F is greater than FGThe electric push rod (4) receives a control system signal, and a push rod of the electric push rod (4) retracts to drive the backrest plate (1) to move downwards; the electric push rod (4) continues to retract, and when F is smaller than FGWhen the electric push rod (4) is retracted, the electric push rod stops retracting;
the tension and pressure sensor (3) detects the force value F of the connecting block (2) in the direction along the central line of the tension and pressure sensor (3) in real time, and the step C is repeated, so that the backrest plate (1) can automatically adapt to the position change of the back of the patient in real time, and the patient does not feel like pulling clothes in the process of lifting the back.
2. The back lifting mechanism for preventing patient from pulling clothes on the back of the patient according to claim 1, wherein the sitting and standing outer frame (7) is formed by welding an upper frame, a lower frame, a left frame and a right frame, and the upper frame, the lower frame, the left frame and the right frame are square tubes.
3. The back lifting mechanism for pulling prevention of clothes on the back of a patient as claimed in claim 1, wherein the lower end of the outer lifting and sitting frame (7) is hinged with the bed (9) through a hinge (6).
4. The back lifting mechanism for preventing the patient from pulling back clothes of claim 3, further comprising a No. 2 electric push rod (11), wherein the end part of the No. 2 electric push rod (11) is hinged with the beam (12) of the sitting and standing outer frame (7); the bottom of the No. 2 electric push rod (11) is hinged with the bed body (9).
5. The back lifting mechanism of claim 4, wherein the No. 2 power push rod (11) is connected with an optical isolation and drive circuit output port wire.
6. The back-lifting mechanism for pulling patient's back clothes according to claim 1, wherein said sensitivity m is0The value range of (A) is 0.1kg-3 kg.
CN201911401487.3A 2019-12-31 2019-12-31 Back lifting mechanism for preventing clothes on back of patient from being pulled Active CN111067736B (en)

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Citations (7)

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Publication number Priority date Publication date Assignee Title
CN101780003A (en) * 2010-01-21 2010-07-21 杭州顿力医疗器械股份有限公司 Full-automatic lifting hospital bed and control method
CN201791000U (en) * 2010-09-21 2011-04-13 崔建忠 Back bedplate for hospital bed
CN204521269U (en) * 2015-04-04 2015-08-05 天津双源电力设备制造有限公司 The back anti-extrusion of intelligent electric Wheel-chair type bed and both wings extending apparatus
CN106667692A (en) * 2016-12-07 2017-05-17 北华大学 Sickbed sitting-up mechanism capable of avoiding back pulling
CN207804520U (en) * 2017-08-28 2018-09-04 北华大学 A kind of multifunctional motor-driven is recovery bed manually
CN208287176U (en) * 2017-07-31 2018-12-28 河北万瑞医疗器械有限公司 Hoisting gear for backrest and multifunctional hospital bed
WO2019032830A1 (en) * 2017-08-09 2019-02-14 Dreamwell, Ltd. Adjustable foundation

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203915290U (en) * 2014-05-14 2014-11-05 莱州科亿宏电动床有限公司 Anti-human body pressurizing unit on a kind of nursing bed backrest

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101780003A (en) * 2010-01-21 2010-07-21 杭州顿力医疗器械股份有限公司 Full-automatic lifting hospital bed and control method
CN201791000U (en) * 2010-09-21 2011-04-13 崔建忠 Back bedplate for hospital bed
CN204521269U (en) * 2015-04-04 2015-08-05 天津双源电力设备制造有限公司 The back anti-extrusion of intelligent electric Wheel-chair type bed and both wings extending apparatus
CN106667692A (en) * 2016-12-07 2017-05-17 北华大学 Sickbed sitting-up mechanism capable of avoiding back pulling
CN208287176U (en) * 2017-07-31 2018-12-28 河北万瑞医疗器械有限公司 Hoisting gear for backrest and multifunctional hospital bed
WO2019032830A1 (en) * 2017-08-09 2019-02-14 Dreamwell, Ltd. Adjustable foundation
CN207804520U (en) * 2017-08-28 2018-09-04 北华大学 A kind of multifunctional motor-driven is recovery bed manually

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