阅读说明：本技术 一种基于等张牵引的颈椎电动牵引装置 (Cervical vertebra electric traction device based on isotonic traction ) 是由 赵东亮 冯坤 陈皓宇 李娜 王健智 于 2020-05-12 设计创作，主要内容包括：本发明公开一种基于等张牵引的颈椎电动牵引装置,涉及医疗器械领域,包括底板、主机箱、拉力传输系统、角度调节系统、控制系统和额带固定系统,前屈后伸角度调节系统包括前屈后伸角度调节机构、安装板和倾角传感器,能够调节安装板的前屈后伸角度,左右侧屈角度调节系统包括光轴、旋转编码器和左右侧屈角度调节机构,左右侧屈角度调节机构用于驱动主机箱相对于光轴转动；拉力传输系统包括头枕、牵引绳、拉压力传感器、拉力箱、蠕动泵、储液箱和导向组件,倾角传感器、前屈后伸角度调节机构、旋转编码器、左右侧屈角度调节机构、拉压力传感器和蠕动泵均与控制系统连接。该装置能够实现对患者的等张牵引治疗,安全性更高,降低设备成本。(The invention discloses a cervical vertebra electric traction device based on isotonic traction, which relates to the field of medical instruments and comprises a bottom plate, a main case, a tension transmission system, an angle adjusting system, a control system and a frontal belt fixing system, wherein the forward-flexion and backward-extension angle adjusting system comprises a forward-flexion and backward-extension angle adjusting mechanism, a mounting plate and an inclination angle sensor, the forward-flexion and backward-extension angle of the mounting plate can be adjusted, the left and right lateral flexion angle adjusting systems comprise an optical axis, a rotary encoder and left and right lateral flexion angle adjusting mechanisms, and the left and right lateral flexion angle adjusting mechanisms are used for driving the main case to rotate relative to the optical axis; the tension transmission system comprises a headrest, a traction rope, a tension pressure sensor, a tension box, a peristaltic pump, a liquid storage box and a guide assembly, wherein the inclination angle sensor, the forward-flexion and backward-extension angle adjusting mechanism, the rotary encoder, the left and right lateral-flexion angle adjusting mechanism, the tension pressure sensor and the peristaltic pump are all connected with the control system. The device can realize the isotonic traction treatment of the patient, has higher safety and reduces the equipment cost.)

1. An electric cervical vertebra traction device based on isotonic traction is characterized by comprising a bottom plate, a main case, a tension transmission system, an angle adjusting system, a control system and a forehead belt fixing system, wherein the angle adjusting system comprises a forward-flexion-backward-extension angle adjusting system and a left-right lateral flexion angle adjusting system, the forward-flexion-backward-extension angle adjusting system comprises a forward-flexion-backward-extension angle adjusting mechanism, a mounting plate and an inclination angle sensor, the mounting plate is arranged above the main case, the forward-flexion-backward-extension angle adjusting mechanism is arranged in the main case, the forward-flexion-backward-extension angle adjusting mechanism is connected with the lower surface of the mounting plate, the inclination angle sensor is fixed on the lower surface of the mounting plate, the left-right lateral flexion angle adjusting system comprises an optical axis, a rotary encoder and a left-right lateral flexion angle adjusting mechanism, the main case is arranged above the bottom plate, the optical axis is fixed on the bottom plate, the rotary encoder is fixed in the mainframe box, and the left and right lateral bending angle adjusting mechanisms are used for driving the mainframe box to rotate relative to the optical axis; the tension transmission system comprises a headrest, a traction rope, a tension pressure sensor, a tension box, a peristaltic pump, a liquid storage box and a guide assembly, the peristaltic pump, the liquid storage box and the guide assembly are arranged in the main case, the tension box is vertically and slidably mounted on the guide assembly, the headrest is slidably mounted on the mounting plate, the forehead belt fixing system is arranged above the headrest, one end of the traction rope is connected with the headrest, the other end of the traction rope is connected with the upper end of the tension pressure sensor, the lower end of the tension pressure sensor is connected with the tension box, a first pump pipe and a second pump pipe are arranged on the peristaltic pump, the first pump pipe is connected with the tension box, and the second pump pipe is connected with the liquid storage box; the inclination angle sensor, the forward-flexion and backward-extension angle adjusting mechanism, the rotary encoder, the left and right lateral flexion angle adjusting mechanism, the tension and pressure sensor and the peristaltic pump are all connected with the control system.

2. The electric cervical traction device based on isotonic traction of claim 1, wherein the tension transmission system further comprises a first fixed pulley, a second fixed pulley, two guide rails, two sliding connection plates and four sliders, the two guide rails are disposed in parallel on the mounting plate, the two sliders are slidably connected to the guide rails, the upper ends of the two sliders on the guide rails are fixedly connected to one sliding connection plate, the headrest is fixed to the two sliding connection plates, the first fixed pulley is fixed to the mounting plate, the second fixed pulley is fixed to the main case, one end of the traction rope is connected to the headrest, and the other end of the traction rope is connected to the upper end of the tension pressure sensor through the first fixed pulley and the second fixed pulley.

3. The electric cervical traction device based on isotonic traction of claim 1, wherein the guiding assembly comprises two upright posts and two flange linear bearings, the two upright posts are fixed in the main case, the two flange linear bearings are respectively fixed on the outer edges of two sides of the tension box, and one flange linear bearing is sleeved on one upright post.

4. The electromotive cervical traction device based on isotonic traction according to claim 1, wherein the adjusting mechanism of the angle of flexion and extension comprises a first electromotive push rod, a first upper connecting member, a first lower connecting member, two second electromotive push rods, two second upper connecting members and two second lower connecting members, the first upper connecting member is fixed to the front end of the lower surface of the mounting plate, the upper end of the first electromotive push rod is hinged to the first upper connecting member, the lower end of the first electromotive push rod is fixed to the inner sidewall of the main chassis through the first lower connecting member, the two second upper connecting members are fixed to both sides of the rear end of the lower surface of the mounting plate, the upper end of each second electromotive push rod is hinged to one of the second upper connecting members, the lower end of each second electromotive push rod is hinged to one of the second lower connecting members, and the second lower connecting members are fixed to the bottom surface of the main chassis, the first electric push rod and the second electric push rod are connected with the control system.

5. The cervical electric traction device based on isotonic traction of claim 4, wherein two backing plates are installed at the bottom of the main case, the left and right lateral flexion angle adjusting mechanism comprises a motor, a shaft coupling, a first gear, a second gear, a fixed shaft sleeve and a fixed support, the fixed shaft sleeve is fixed at the bottom of the bottom plate, the optical axis is fixedly sleeved in the fixed shaft sleeve, the first gear is fixedly sleeved on the optical axis, the first gear is arranged between the main case and the bottom plate, the rotary encoder is installed at the upper end of the optical axis through the shaft coupling, the rotary encoder is fixed on the inner side wall of the main case through the fixed support, the motor is installed at one side of the rotary encoder, the motor is fixed at the bottom of the main case, the second gear is fixed on the output shaft of the motor, the second gear is arranged between the main case and the bottom plate, the second gear is meshed with the first gear, and the motor is connected with the control system.

6. The electric cervical traction device based on isotonic traction of claim 5, wherein the control system comprises a programmable touch screen, a PLC controller and an analog module, the programmable touch screen is disposed on the main cabinet, the programmable touch screen is connected with the PLC controller through Ethernet, the tilt sensor and the pull pressure sensor are both connected with the analog module, the analog module is connected with the PLC controller, and the rotary encoder, the first electric push rod, the second electric push rod, the motor and the peristaltic pump are all connected with the PLC controller.

7. The electric cervical traction apparatus based on isotonic traction according to claim 1, the forehead belt fixing system comprises an elastic belt, a forehead cushion, two air holes, two plum-blossom handle screws, two first nuts, two second nuts and two gaskets, the lower surface of headrest mounting panel both sides is fixed with one respectively first nut, the elastic webbing both ends are provided with the through-hole, each install one on the through-hole the gas eye, each the gas eye below is provided with one the gasket, each the gasket below is provided with one the second nut, each plum blossom handle screw passes one the gas eye, one the gasket and one the second nut install in one in the first nut, the forehead pad set up in the middle part of the elastic webbing inboard face.

8. The electric cervical traction device based on isotonic traction of claim 1, further comprising an organ type protective cover, wherein the mounting plate is connected with the main case through the organ type protective cover.

9. An electric cervical traction device based on isotonic traction according to claim 1 characterized in that four casters are provided under the base plate.

Technical Field

The invention relates to the field of medical instruments, in particular to an electric cervical vertebra traction device based on isotonic traction.

Background

The traction treatment is to load the neck of a patient to change the shape and position of the cervical vertebra of the patient, so as to relieve the pressure of the intervertebral disc and relieve the compression states of nerve roots, spinal cords, blood vessels and the like, thereby achieving the purpose of treatment. The effect of traction treatment is related to factors such as traction angle, strength, time, mode, speed, posture, strength change degree and the like. The traction force transmission mode of the electric traction device in the current market is transmitted to the part to be dragged through a motor, a transmission mechanism, a traction rope or a traction plate. Generally, a traction force feedback control mode is adopted, parameters input by an operator are converted into given signals through a control system, and the motor is controlled to rotate positively and negatively by comparing the given signals with sensor feedback signals, so that the force is added or reduced, and the purpose of constant-force traction is achieved. When the posture of the patient is slightly changed, the traction force is suddenly changed, and the rotation of the motor corrects the deviation in time. Thus, the patient feels that the traction force is changed and corrected all the time during the traction treatment process, and the true isotonic traction cannot be realized. Although the weight hammer type traction frame on the market is in equal-tension traction, the variation is large, gradual force application and gradual force reduction cannot be realized, and the time and the angle cannot be accurately controlled.

Disclosure of Invention

In order to solve the technical problems, the invention provides the cervical vertebra electric traction device based on the isotonic traction, which can realize isotonic traction treatment on patients, has higher safety and reduces the equipment cost.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a cervical vertebra electric traction device based on isotonic traction, which comprises a bottom plate, a main case, a tension transmission system, an angle adjusting system, a control system and a forehead belt fixing system, wherein the angle adjusting system comprises a forward bending and backward stretching angle adjusting system and a left and right lateral bending angle adjusting system, the forward bending and backward stretching angle adjusting system comprises a forward bending and backward stretching angle adjusting mechanism, an installation plate and an inclination angle sensor, the installation plate is arranged above the main case, the forward bending and backward stretching angle adjusting mechanism is arranged in the main case, the forward bending and backward stretching angle adjusting mechanism is connected with the lower surface of the installation plate, the inclination angle sensor is fixed on the lower surface of the installation plate, the left and right lateral bending angle adjusting system comprises an optical axis, a rotary encoder and a left and right lateral bending angle adjusting mechanism, the main case is arranged above the bottom plate, and the optical axis is fixed on the bottom plate, the rotary encoder is fixed in the main case, and the left and right lateral bending angle adjusting mechanisms are used for driving the main case to rotate relative to the optical axis; the tension transmission system comprises a headrest, a traction rope, a tension pressure sensor, a tension box, a peristaltic pump, a liquid storage box and a guide assembly, the peristaltic pump, the liquid storage box and the guide assembly are arranged in the main case, the tension box is vertically and slidably mounted on the guide assembly, the headrest is slidably mounted on the mounting plate, the forehead belt fixing system is arranged above the headrest, one end of the traction rope is connected with the headrest, the other end of the traction rope is connected with the upper end of the tension pressure sensor, the lower end of the tension pressure sensor is connected with the tension box, a first pump pipe and a second pump pipe are arranged on the peristaltic pump, the first pump pipe is connected with the tension box, and the second pump pipe is connected with the liquid storage box; the inclination angle sensor, the forward-flexion and backward-extension angle adjusting mechanism, the rotary encoder, the left and right lateral flexion angle adjusting mechanism, the tension and pressure sensor and the peristaltic pump are all connected with the control system.

Preferably, the tension transmission system further comprises a first fixed pulley, a second fixed pulley, two guide rails, two sliding connection plates and four sliders, wherein the guide rails are arranged on the mounting plate in parallel and are connected with the two sliders and the two sliders respectively, the two sliders are arranged on the guide rails, the upper ends of the sliders are fixedly connected with the sliding connection plates, the headrests are fixed on the two sliding connection plates, the first fixed pulley is fixed on the mounting plate, the second fixed pulley is fixed on the mainframe box, one end of the traction rope is connected with the headrests, and the other end of the traction rope passes through the first fixed pulley and the second fixed pulley and is connected with the upper end of the tension pressure sensor.

Preferably, the guide assembly comprises two upright columns and two flange linear bearings, the two upright columns are fixed in the main machine box, the two flange linear bearings are respectively fixed on the outer edges of two sides of the tension box, and one flange linear bearing is sleeved on one upright column.

Preferably, the forward-flexion and backward-extension angle adjusting mechanism comprises a first electric push rod, a first upper connecting piece, a first lower connecting piece, two second electric push rods, two second upper connecting pieces and two second lower connecting pieces, the first upper connecting piece is fixed at the front end of the lower surface of the mounting plate, the upper end of the first electric push rod is hinged on the first upper connecting piece, the lower end of the first electric push rod is fixed on the inner side wall of the main case through the first lower connecting piece, the two second upper connecting pieces are fixed on two sides of the rear end of the lower surface of the mounting plate, the upper end of each second electric push rod is hinged on one second upper connecting piece, the lower end of each second electric push rod is hinged on one second lower connecting piece, the second lower connecting piece is fixed on the bottom surface of the mainframe box, and the first electric push rod and the second electric push rod are connected with the control system.

Preferably, two backing plates are installed at the bottom of the mainframe box, the left and right lateral bending angle adjusting mechanisms comprise a motor, a shaft coupler, a first gear, a second gear, a fixed shaft sleeve and a fixed support, the fixed shaft sleeve is fixed at the bottom of the bottom plate, the optical axis is fixedly sleeved in the fixed shaft sleeve, the first gear is fixedly sleeved on the optical axis, the first gear is arranged between the mainframe box and the bottom plate, the rotary encoder is installed at the upper end of the optical axis through the shaft coupler, the rotary encoder is fixed on the inner side wall of the mainframe box through the fixed support, the motor is installed at one side of the rotary encoder, the motor is fixed at the bottom of the mainframe box, the second gear is fixed on the output shaft of the motor, the second gear is arranged between the mainframe box and the bottom plate, the second gear is meshed with the first gear, and the motor is connected with the control system.

Preferably, control system includes touch-sensitive screen able to programme, PLC controller and analog quantity module, touch-sensitive screen able to programme set up in on the mainframe box, touch-sensitive screen able to programme with the PLC controller passes through the ethernet and connects, inclination sensor with draw pressure sensor all with the analog quantity module is connected, the analog quantity module with the PLC controller is connected, rotary encoder first electric putter the second electric putter the motor with the peristaltic pump all with the PLC controller is connected.

Preferably, the headrest bottom is provided with the headrest mounting panel, forehead area fixing system includes elastic webbing, forehead pad, two gas eyes, two plum blossom handle screws, two first nuts, two second nuts and two gaskets, the lower surface of headrest mounting panel both sides is fixed with one respectively first nut, the elastic webbing both ends are provided with the through-hole, each install one on the through-hole gas eye, each gas eye below is provided with one the gasket, each the gasket below is provided with one the second nut, each plum blossom handle screw passes one gas eye, one gasket and one the second nut is installed in one in the first nut, the forehead pad set up in the middle part of the inboard side in the elastic webbing.

Preferably, the portable computer case further comprises an organ type protective cover, and the mounting plate is connected with the main case through the organ type protective cover.

Preferably, four casters are provided below the base plate.

Compared with the prior art, the invention has the following technical effects:

the invention provides a cervical vertebra electric traction device based on isotonic traction, which comprises a bottom plate, a mainframe box, a tension transmission system, an angle adjusting system, a control system and a frontal belt fixing system, wherein the traction force is controlled by adopting a peristaltic pump to control the weight of liquid in a tension box, and the cervical vertebra electric traction device is flexible traction and can realize isotonic traction treatment on a patient by adding tension dynamic compensation control. Even if the peristaltic pump is out of control, the weight when the biggest traction force is full of liquid for the pulling force case can not cause the injury to the patient, and the security is higher, and the traction force transmission mode among the pulling force transmission system is simple, has saved complicated drive mechanism and motor speed governing system, can reduce equipment cost. The traction device can realize accurate measurement and control of traction force, left and right lateral bending angles and forward and backward stretching angles, organically combines all functions into a whole, and has compact structure and small volume, so that the traction device realizes intellectualization.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic perspective view of an electric cervical traction device based on isotonic traction according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a front view of the cervical electric traction apparatus based on isotonic traction provided by the present invention;

fig. 4 is a front view of the inventive cervical spine electric traction apparatus based on isotonic traction, after the main chassis is removed;

fig. 5 is a schematic view of a first three-dimensional structure of the cervical electric traction apparatus based on isotonic traction provided by the present invention after the main chassis is removed;

fig. 6 is a schematic view of a second perspective structure of the cervical spine electric traction apparatus based on isotonic traction provided by the present invention after the main chassis is removed.

Description of reference numerals: 1. a base plate; 2. a main chassis; 3. a base plate; 4. a caster wheel; 5. a programmable touch screen; 6. mounting a plate; 7. an organ-type shield; 8. a headrest; 9. a hauling rope; 10. a pull pressure sensor; 11. a tension box; 12. a peristaltic pump; 13. a liquid storage tank; 14. a first pump tube; 15. a second pump tube; 16. a guide rail; 17. a slider; 18. a sliding connection plate; 19. a first fixed pulley; 20. a second fixed pulley; 21. a column; 22. a flange linear bearing; 23. fixing the sleeve; 24. a connecting member; 25. a tilt sensor; 26. a first electric push rod; 27. a second electric push rod; 28. a first upper connecting member; 29. a first lower connecting member; 30. a second upper connecting member; 31. a second lower connecting member; 32. an optical axis; 33. fixing the shaft sleeve; 34. a first gear; 35. a coupling; 36. a rotary encoder; 37. a fixed support; 38. a motor; 39. a second gear; 40. a headrest mounting plate; 41. an elastic band; 42. a forehead pad; 43. air holes; 44. a plum blossom handle screw; 45. a first nut; 46. a second nut; 47. and (7) a gasket.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide an electric cervical vertebra traction device based on isotonic traction, which can realize isotonic traction treatment on a patient, has higher safety and reduces equipment cost.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1 to 6, the present embodiment provides an electric cervical traction device based on isotonic traction, which includes a bottom plate 1, a main chassis 2, a tension transmission system, an angle adjustment system, a control system and a forehead belt fixing system, wherein the angle adjustment system includes a forward-flexion-extension angle adjustment system and a left-right lateral flexion angle adjustment system, the forward-flexion-extension angle adjustment system includes a forward-flexion-extension angle adjustment mechanism, a mounting plate 6 and an inclination sensor 25, the mounting plate 6 is disposed above the main chassis 2, the forward-flexion-extension angle adjustment mechanism is disposed in the main chassis 2, the forward-flexion-extension angle adjustment mechanism is connected to a lower surface of the mounting plate 6, the forward-flexion-extension angle adjustment mechanism is used for adjusting a forward-flexion-extension angle of the mounting plate 6, the forward-flexion-extension angle is an inclination angle between the mounting plate 6 and a horizontal plane, and the inclination sensor 25 is fixed to the lower surface of the mounting plate 6; the left and right lateral flexion angle adjusting system comprises an optical axis 32, a rotary encoder 36 and a left and right lateral flexion angle adjusting mechanism, the mainframe box 2 is arranged above the bottom plate 1, the optical axis 32 is fixed on the bottom plate 1, the rotary encoder 36 is fixed in the mainframe box 2, the left and right lateral flexion angle adjusting mechanism is used for driving the mainframe box 2 to rotate relative to the optical axis 32, namely the left and right lateral flexion angle adjusting mechanism is used for adjusting the left and right lateral flexion angles of the mounting plate 6 arranged on the mainframe box 2. In order to facilitate the movement of the whole device, four casters 4 are arranged below the bottom plate 1.

The tension transmission system comprises a headrest 8, a traction rope 9, a tension pressure sensor 10, a tension box 11, a peristaltic pump 12, a liquid storage box 13 and a guide assembly, wherein the peristaltic pump 12, the liquid storage box 13 and the guide assembly are arranged in the main case 2, vertical slidable mounting of pulling force case 11 is on the direction subassembly, 8 slidable mounting of headrest are on mounting panel 6, frontal area fixed system sets up in the headrest 8 top, 9 one ends of haulage rope are connected with headrest 8, the 9 other ends of haulage rope are connected with pull pressure sensor 10 upper end, pull pressure sensor 10 lower extreme and pulling force case 11 are connected, be provided with first pump line 14 and second pump line 15 on the peristaltic pump 12, first pump line 14 is connected with pulling force case 11, second pump line 15 is connected with the liquid reserve tank 13, inclination sensor 25, reach back and stretch angle adjustment mechanism, rotary encoder 36, control lateral flexion angle adjustment mechanism, pull pressure sensor 10 and peristaltic pump 12 all are connected with control system. The pulling force sensor 10 detects a feedback pulling force value and transmits the feedback pulling force value to the control system, and the control system controls the peristaltic pump 12 to rotate forwards and backwards to increase or decrease liquid in the pulling force box 11, so that the pulling force is maintained near a set value, and the dynamic compensation control of the pulling force is realized.

In the embodiment, the traction force is controlled by adopting the mode that the peristaltic pump 12 controls the weight of the liquid in the tension tank 11, and the treatment of the isotonic traction of the patient can be realized by flexible traction and tension dynamic compensation control. In case when the motor is out of control, traction force will infinitely increase in the electric traction device on the market, generally protect by manual emergency release button, but when patient's reaction is slow, the phenomenon that traction force increases suddenly still can appear, have certain potential safety hazard, compare with current electric traction device, even if peristaltic pump 12 is out of control in this implementation, weight (10kg) when the biggest traction force is 11 full of liquid for the pulling force case can not cause the injury to the patient, and the security is higher. The traction force transmission mode in the embodiment is simple, a complex transmission mechanism and a motor speed regulation system are omitted, and the equipment cost can be reduced.

The tension transmission system further comprises a first fixed pulley 19, a second fixed pulley 20, two guide rails 16, two sliding connection plates 18 and four sliding blocks 17, the two guide rails 16 are arranged on the mounting plate 6 in parallel, the two sliding blocks 17 are connected to the guide rails 16 in a sliding mode, the upper ends of the two sliding blocks 17 on the guide rails 16 are fixedly connected with the sliding connection plates 18, the headrest 8 is fixed to the two sliding connection plates 18, the first fixed pulley 19 is fixed to the mounting plate 6, the second fixed pulley 20 is fixed to the main case 2, one end of the traction rope 9 is connected with the headrest 8, and the other end of the traction rope 9 is connected with the upper end of the tension pressure sensor 10 through the first fixed pulley 19 and the second fixed pulley 20. Specifically, the headrest is provided at the bottom with a connector 24, and one end of the traction rope 9 is fixed to the connector 24.

The guide assembly comprises two upright columns 21 and two flange linear bearings 22, the two upright columns 21 are fixed in the main case 2, the two flange linear bearings 22 are respectively fixed on the outer edges of two sides of the tension box 11, and one flange linear bearing 22 is sleeved on one upright column 21, so that the tension box 11 is guaranteed to vertically move up and down all the time. Specifically, the outer edges of the two sides of the pulling force box 11 are respectively provided with a mounting hole, the flange linear bearing 22 penetrates through the mounting holes from top to bottom, and the upper end of the flange linear bearing 22 is fixedly connected with the outer edge of the pulling force box 11. The upper and lower ends of each of the pillars 21 are fixed to the top and bottom surfaces of the main cabinet 2 by a fixing sleeve 23, respectively.

The forward-bending and backward-extending angle adjusting mechanism comprises a first electric push rod 26, a first upper connecting piece 28, a first lower connecting piece 29, two second electric push rods 27, two second upper connecting pieces 30 and two second lower connecting pieces 31, the first upper connecting piece 28 is fixed at the front end of the lower surface of the mounting plate 6, the upper end of the first electric push rod 26 is hinged on the first upper connecting piece 28, the lower end of the first electric push rod 26 is fixed on the inner side wall of the mainframe box 2 through the first lower connecting piece 29, the two second upper connecting pieces 30 are fixed at the two sides of the rear end of the lower surface of the mounting plate 6, the upper end of each second electric push rod 27 is hinged on one second upper connecting piece 30, the lower end of each second electric push rod 27 is hinged on one second lower connecting piece 31, the second lower connecting pieces 31 are fixed on the bottom surface of the mainframe box 2, and the first electric push rod 26 and the second electric push rod 27 are both connected with a control system. The purpose of adjusting the forward and backward extending angles of the mounting plate 6 and the headrest 8 can be achieved by adjusting the lifting heights of the first electric push rod 26 and the two second electric push rods 27.

The embodiment also comprises an organ type protective cover 7, and the mounting plate 6 is connected with the main case 2 through the organ type protective cover 7. The organ type protective cover 7 can ensure that the mounting plate 6 and the mainframe box 2 are always kept in a closed state when the forward-bending and backward-stretching angles are adjusted, and can prevent potential safety hazards caused by the fact that dust, moisture and other sundries enter the mainframe box 2.

The bottom of the main case 2 is provided with two backing plates 3, the left and right lateral bending angle adjusting mechanism comprises a motor 38, a coupler 35, a first gear 34, a second gear 39, a fixed shaft sleeve 33 and a fixed support 37, the fixed shaft sleeve 33 is fixed at the bottom of the bottom plate 1, the optical axis 32 is fixedly sleeved in the fixed shaft sleeve 33, specifically, the optical axis 32 passes through the fixed shaft sleeve 33 and is locked with a top thread of the fixed shaft sleeve 33 to enable the optical axis 32 not to rotate, the first gear 34 is fixedly sleeved on the optical axis 32, the first gear 34 is arranged between the main case 2 and the bottom plate 1, specifically, the optical axis 32 is locked with the optical axis 32 to enable the optical axis 32 not to rotate through the top thread of the first gear 34, the optical axis 32 extends into the main case 2, the upper end of the optical axis 32 is provided with a rotary encoder 36 through the coupler 35, the coupler 35 is arranged inside the main case 2, the rotary encoder 36 is fixed on the inner side wall of the main case 2 through the fixed support 37, a motor 38 is installed at one side of the rotary encoder 36, the motor 38 is fixed at the bottom of the main cabinet 2, a second gear 39 is fixed on an output shaft of the motor 38, specifically, the second gear 39 and the output shaft of the motor 38 are locked by a jackscrew of the second gear 39, the second gear 39 is arranged between the main cabinet 2 and the bottom plate 1, the second gear 39 is meshed with the first gear 34, and the motor 38 is connected with a control system. The motor 38 starts to work, and then drives the second gear 39 to rotate, because the first gear 34 is fixed, the motor 38 is connected with the main case 2 and rotates around the optical axis 32, because the rotary encoder 36 is installed in the main case 2, the rotary encoder 36 rotates together with the main case 2, the coupler 35 is installed on the optical axis 32, the position is kept fixed, and then the horizontal rotation angle is measured.

The control system comprises a programmable touch screen 5, a PLC (programmable logic controller) and an analog quantity module, the programmable touch screen 5 is arranged on the mainframe box 2, the programmable touch screen 5 has the functions of setting and displaying traction force, a forward bending and backward stretching angle, a left side bending angle, a right side bending angle, traction time and other parameters, the programmable touch screen 5 is connected with the PLC through an Ethernet, the inclination angle sensor 25 and the pull pressure sensor 10 are both connected with the analog quantity module, the analog quantity module is connected with the PLC, the rotary encoder 36, the first electric push rod 26, the second electric push rod 27, the motor 38 and the peristaltic pump 12 are both connected with the PLC.

When the device is used, traction force, a forward-flexion-backward-extension angle and a left-right lateral-extension angle are set through the programmable touch screen 5 according to the requirements of a patient, the current values of the traction force and the forward-flexion-backward-extension angle measured by the tension pressure sensor 10 and the inclination angle sensor 25 are processed by analog quantity modules through signals and then are transmitted to the PLC, the current values of the left-right lateral-extension angle measured by the rotary encoder 36 are directly transmitted to the PLC, and the PLC controls the positive and negative rotation of the peristaltic pump 12 and the motor 38 and the extension or contraction of the first electric push rod 26 or the second electric push rod 27 according to the deviation between the measured values and the set values, so that the traction force, the left-right lateral-extension angle and the forward-flexion-backward-extension angle are maintained near the set values, and the purpose of closed-loop constant control is achieved. Therefore, the traction device can realize accurate measurement and control of traction force, left and right lateral bending angles and forward and backward stretching angles, organically combines all functions into a whole, has a compact structure and small volume, and realizes intellectualization.

As shown in fig. 2, a headrest mounting plate 40 is disposed at the bottom of the headrest 8, the forehead strap fixing system includes an elastic strap 41, a forehead pad 42, two air holes 43, two plum handle screws 44, two first nuts 45, two second nuts 46 and two gaskets 47, the lower surfaces of the two sides of the headrest mounting plate 40 are respectively fixed with one first nut 45, through holes are disposed at the two ends of the elastic strap 41, one air hole 43 is mounted on each through hole, one gasket 47 is disposed below each air hole 43, one second nut 46 is disposed below each gasket 47, each plum handle screw 44 passes through one air hole 43, one gasket 47 and one second nut 46 and is mounted in one first nut 45, the gasket 47 and the second nut 46 limit the air hole 43 so that the position of the air hole is fixed but not locked, and the forehead pad 42 is disposed in the middle of the inner side of the elastic strap 41. When the head support is used, the threaded end of one plum blossom handle screw 44 is screwed into the corresponding first nut 45 at the bottom of one side of the headrest mounting plate 40, the other plum blossom handle screw 44 is screwed into the first nut 45 at the bottom of the other side of the headrest mounting plate 40 after the head position of a patient is static, and the fixed tightness degree of the forehead band of the head of the patient is adjusted by adjusting the screwing depth.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.