Hand fixator for patient treatment

Abstract

The invention relates to the technical field of medical equipment, and discloses a patient treatment hand fixator which comprises a base plate, sliding rails are fixedly arranged on the two sides of the base plate, each sliding rail comprises an inclined rail section and an arc rail section, the upper end of each inclined rail section protrudes out of the base plate, and the inclined rail sections are connected with the arc rail sections; a sliding block is arranged on the sliding rail; a fixing belt is connected between the two sliding blocks and located above the base plate. A ratchet wheel is rotationally arranged at the bottom of the base plate. A torsional spring is connected between the ratchet wheel and the base plate. Pawls are arranged outside the ratchet wheels; a mounting base is rotatably arranged on the pawl, the mounting base is slidably connected to the base plate in the radial direction of the ratchet wheel, the pawl is rotatably connected with the mounting base, and a torsional spring is connected between the pawl and the mounting base; a wheel disc is fixedly connected to the ratchet wheel, and two pull ropes are wound around the wheel disc and fixedly connected to the two sliding blocks. The problems that in the current infusion operation, the hand of a patient needs to be bound through a bandage or gauze to limit movement of the hand, operation is tedious, and use is inconvenient can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of medical equipment, and in particular to a hand fixator for patient treatment. Background Art

[0002] In current medical practice, during treatment, especially during infusion operations, it is very easy for patients to move their hands at will, resulting in needle dislodgment or displacement. This is especially true for some agitated patients or young children whose movements are difficult to control and behaviors are difficult to restrain. The above situation often occurs, which not only easily causes abnormal pain to patients, but also prolongs the duration of treatment and affects the treatment effect.

[0003] The traditional solution to the above problem is for medical staff to tie up and restrain the patient's hands, such as using bandages or gauze to tie and wrap around the patient's hands to limit their range of motion. However, in actual operation, this treatment method requires the patient's hands to be tied up every time after the acupuncture is completed, which is very inconvenient to use, and it is difficult to control the strength during tying. It is very easy to tie too tightly, resulting in poor hand comfort, or too loosely, making it difficult to achieve the purpose of effective fixation. Summary of the invention

[0004] The present invention is intended to provide a hand fixator for patient treatment, so as to solve the problem that during the current infusion operation, a bandage or gauze needs to be used to bind the patient's hand to restrict the hand movement, which results in cumbersome operation and inconvenient use.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a patient treatment hand fixator, comprising a base plate, both sides of the base plate are fixedly provided with slide rails, the slide rails include an inclined rail section and an arc rail section, the upper end of the inclined rail section protrudes from the upper surface of the base plate, the lower end of the inclined rail section is connected to the arc rail section, and the arc rail section is located below the base plate; sliders are slidably provided on the slide rails, the sliders can slide between the inclined rail section and the arc rail section, and a spring is connected between the upper end of the slide rail and the slider; a fixing belt is connected between the two sliders, and the fixing belt is located above the base plate;

[0006] A ratchet is rotatably provided at the bottom of the base plate, and a torsion spring is connected between the ratchet and the base plate; a pawl is provided on the outer side of the ratchet, and the pawl is inserted into the ratchet teeth of the ratchet; a mounting seat is rotatably provided on the pawl, and the mounting seat is slidably connected to the base plate along the radial direction of the ratchet, and the pawl is rotatably connected to the mounting seat, and a torsion spring is connected between the pawl and the mounting seat;

[0007] A wheel disc is fixedly connected to the ratchet wheel, two pull ropes are wound around the wheel disc, and ends of the two pull ropes away from the wheel disc are fixedly connected to two sliding blocks respectively.

[0008] The principle and advantages of this solution are: the base plate is used to place the patient's hand. When the patient's hand needs to be fixed for infusion, the wheel is turned to rotate the wheel to wind the pull rope, and the pull rope pulls the slider to slide on the slide rail. The two sliders enter the arc track section from the inclined track section, so that the fixing belt is pressed on the patient's hand to fix the patient's hand. As the slider slides from the top of the base plate to the bottom of the base plate, the two ends of the fixing belt are bent toward the bottom of the base plate, thus simulating the process of the fixing belt being tied to the patient's hand, ensuring that the fixing belt can effectively fix the hand.

[0009] During the rotation of the wheel, the fixed ratchet is driven to rotate, and the pawl continuously slides over the ratchet teeth of the ratchet. Combined with the patient's comfort level and the tightness of the binding, when the slider moves to the appropriate position, the wheel stops rotating. At this time, the ratchet stops rotating, and the pawl is stuck between the ratchet teeth of the ratchet to prevent the ratchet from reversing under the action of the torsion spring, thereby locking the ratchet. At this time, the wheel is also fixed with the ratchet, and the position of the slider is also locked, so that the fixation belt remains in the appropriate position and the patient's hand is firmly fixed.

[0010] When the fixing force of the fixing belt is large, or the fixing belt needs to be loosened after the infusion is completed, the pawl is slid away from the ratchet wheel, and the ratchet wheel can rotate in the opposite direction under the potential energy of the torsion spring to release the pull rope. After the pull rope is released, the slider can slide in the opposite direction along the slide rail under the action of the spring, thereby loosening the fixing belt to adjust the fixing force of the fixing belt on the hand, or even release the fixation of the fixing belt on the hand.

[0011] The advantages of this solution are:

[0012] 1. The sliding of the slider drives the fixation belt to move. Combined with the design of the arc track section, the two ends of the fixation belt are automatically bent downward to simulate the binding process, so that the fixation belt can automatically and effectively fix the patient's hand without manual binding and fixing, making the operation more convenient;

[0013] 2. Since the fixing force of the fixation belt on the patient's hand is controlled by the final position of the slider, during the fixation process, the final stop position of the slider can be flexibly selected according to the patient's force level and hand size, making the device applicable to a wider range of people;

[0014] 3. To fix the patient's hand, you only need to rotate the wheel to operate it. During the rotation process, you can stop and adjust at any time according to the patient's feeling of the fixation strength. At the same time, the wheel can be rotated with one hand, which makes it more convenient to tie and adjust the fixation strength.

[0015] 4. By sliding the pawl, the ratchet can be unlocked, and the slider can be slid in the opposite direction to adjust the fixing force of the fixing belt or to automatically release the fixing belt from the hand. During operation, it can be handled with one hand, and the unlocking operation is also more convenient.

[0016] Preferably, as an improvement, an adjusting rod is rotatably provided at the bottom of the base plate, a knot is fixedly provided on the adjusting rod, a small gear is fixedly provided on the knot, a protective cover is fixedly connected to the end of the base plate, the protective cover is retractable and foldable, a large gear is fixedly connected to the end of the protective cover away from the base plate, the large gear is rotatably connected to the base plate, the large gear is meshed with the small gear, and when the protective cover is opened, the slide rail is located inside the protective cover.

[0017] By rotating the adjustment rod, the small gear can be driven by the knot to rotate, and the small gear drives the large gear to rotate, so that the end of the protective cover rotates, so that the protective cover is opened and forms a shielding protection above the hand to prevent the external force from accidentally touching the hand and causing the needle to fall off or the needle to shift. The protective cover is a retractable and foldable structure, which is more convenient for opening and closing. When the protective cover is opened, the slide rail is located below it. In this way, the slide rail acts as a supporting structure of the protective cover on the one hand to ensure the stability of the protective cover when working, and on the other hand, it acts as an isolation component between the protective cover and the surface of the hand, so that there is an appropriate distance between the protective cover and the surface of the hand, which can prevent the protective cover from directly contacting and rubbing the hand, and provide a concave and deformation space when the protective cover is impacted by external force, thereby strengthening the protection of the hand. The small gear and the large gear in this scheme refer to two gears with a relatively small diameter and a large diameter. In this way, the number of rotations of the adjustment rod can be reduced to the protective cover through the meshing action between the small gear and the large gear, so that when the adjustment rod rotates several times, the large gear only drives the protective cover to swing at a small angle to open the protective cover.

[0018] Preferably, as an improvement, the adjusting rod is a double-headed screw, both ends of which are provided with nut sleeves, the nut sleeves are threadedly connected to the screw, and the nut sleeves are slidably connected to the base plate; a traction rope is connected between the two sliders, a sliding column is slidably provided at the bottom of the base plate, the sliding column can slide along the length direction of the base plate, a spring is connected between the sliding column and the base plate, the middle part of the traction rope is fixed on the sliding column, the traction rope is located between the two nut sleeves, and the two nut sleeves can slide along the axial direction of the screw and clamp the traction rope.

[0019] Through the above scheme, when the two sliders move closer together along the slide rail, the tension between the two ends of the traction rope is reduced. At this time, the sliding column slides on the base plate under the action of the spring, so that the traction rope is always pulled straight. After the slider moves to a suitable position, the adjustment rod is rotated to open the protective cover, and the two nut sleeves move closer along the axial direction of the adjustment rod under the push of the thread on the adjustment rod. Finally, the two nut sleeves are pressed together to clamp and fix the traction rope, thereby further fixing the position of the slider, avoiding the situation in which the slider retreats and the fixing belt is loosened due to the accidental contact with the ratchet during use, and realizing auxiliary locking of the slider position.

[0020] Preferably, as an improvement, a plurality of arranged and distributed protrusions are provided on opposite sides of the two nut sleeves, and the protrusions on the two nut sleeves are staggered, with a protrusion on one nut sleeve facing a gap between adjacent protrusions on the other nut sleeve.

[0021] Through the above scheme, the setting of the protrusion makes it possible to better fix the traction rope when the traction rope is clamped and fixed between the two nut sleeves, thereby improving the locking effect of the slider position.

[0022] Preferably, as an improvement, arc-shaped baffles are provided on both side edges of the slide rail, and there is a gap between the two sets of baffles for the slider to pass through, and the pull rope is located between the slide rail and the baffles and extends along the slide rail.

[0023] Through the above solution, the baffle is used to limit the pull rope, so that the pull rope can only extend and move along the slide rail, avoiding the pull rope from being entangled and knotted and entangled with the external structure, which is more convenient for practical application.

[0024] Preferably, as an improvement, the slide rail, ratchet, pawl, pull rope and fixing belt are provided in two groups which are symmetrically distributed front to back.

[0025] Through the above scheme, the two groups of structures fix the front and back sides of the acupuncture site on the hand respectively, which can improve the fixation effect on the hand and prevent the needle from falling off or shifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A front view of the substrate.

[0027] Figure 2 It is a bottom view of the embodiment of the present invention, which shows the state when the slider moves to below the substrate.

[0028] Figure 3 for Figure 2 Enlarged view of part A in the figure.

[0029] Figure 4 A cross-sectional view of the slide rail.

[0030] Figure 5is a side view of the base plate, showing the state when the protective cover is open.

[0031] Figure 6 FIG. 4 is a front view of the substrate, showing a state where the slider moves to below the substrate. DETAILED DESCRIPTION

[0032] The following is further described in detail through specific implementations, but the implementation of the present invention is not limited thereto. Unless otherwise specified, the technical means used in the following implementations are conventional means well known to those skilled in the art; the experimental methods used are all conventional methods; the materials, reagents, etc. used can all be obtained from commercial channels.

[0033] The figure marks in the drawings of the specification include: base plate 1, slide rail 2, inclined rail section 3, arc track section 4, slider 5, spring 6, fixing belt 7, ratchet 8, pawl 9, mounting seat 10, wheel 11, pull rope 12, adjustment rod 13, small gear 14, large gear 15, protective cover 16, nut sleeve 17, traction rope 18, sliding column 19, protrusion 20, baffle 21.

[0034] In this embodiment, a patient is treated with a hand fixator, such as Figure 1 and Figure 2 As shown together, it includes a base plate 1, which is used to place the patient's hand. Both sides of the base plate 1 are fixed with slide rails 2, which include an inclined rail section 3 and an arc rail section 4. The upper end of the inclined rail section 3 protrudes from the upper surface of the base plate 1, and the lower end of the inclined rail section 3 is connected to the arc rail section 4, which is located below the base plate 1. Slide blocks 5 are slidably provided on the slide rails 2, and the slide blocks 5 can slide between the inclined rail section 3 and the arc rail section 4. A spring 6 is connected between the upper end of the slide rail 2 and the slide block 5; a fixing belt 7 is fixedly connected between the two slide blocks 5, and the fixing belt 7 is located above the base plate 1.

[0035] Combination Figure 2 As shown, a ratchet 8 is rotatably provided at the bottom of the base plate 1, and a torsion spring is connected between the ratchet 8 and the base plate 1; a pawl 9 is provided on the outer side of the ratchet 8, and the pawl 9 is inserted into the ratchet teeth of the ratchet 8; a mounting seat 10 is rotatably provided on the pawl 9, and the mounting seat 10 is connected to the base plate 1 along the radial direction of the ratchet 8 by sliding, and the pawl 9 is rotatably connected to the mounting seat 10. In this embodiment, the pawl 9 and the mounting seat 10 are hingedly connected. It is easy to understand that through the reasonable setting of the structure, the pawl 9 can only rotate within a small angle range, so as to adapt to the forward rotation of the ratchet 8 and reverse braking of the ratchet 8. This is a content well known to those skilled in the art and will not be repeated here. A torsion spring is connected between the pawl 9 and the mounting seat 10; through the setting of the torsion spring, when the ratchet 8 rotates forward, the pawl 9 can swing slightly to give way to the movement of the ratchet teeth on the ratchet 8, and after the ratchet teeth slide over the pawl 9, the torsion spring can quickly reset the pawl 9 and insert it between the ratchet teeth to control the ratchet 8 from rotating in the reverse direction.

[0036] A wheel disc 11 is fixedly connected to the ratchet 8 , and two pull ropes 12 are wound around the wheel disc 11 . One end of the two pull ropes 12 away from the wheel disc 11 is fixedly connected to the two sliders 5 .

[0037] The bottom of the base plate 1 is also rotatably provided with an adjusting rod 13, on which a knot is fixed, and on which a pinion 14 is fixed. A protective cover 16 is fixedly connected to the end of the base plate 1, and the protective cover 16 is retractable and foldable. Figure 2 and Figure 5 As shown, the end of the protective cover 16 away from the base plate 1 is fixedly connected to a large gear 15, the large gear 15 is rotatably connected to the base plate 1, the large gear 15 is meshed with the small gear 14, and the slide rail 2 is located in the protective cover 16 when the protective cover 16 is opened. Figure 2 The adjusting rod 13 in this embodiment is a double-ended lead screw, and both ends of the double-ended lead screw are sleeved with nut sleeves 17, which are threadedly connected to the lead screw, and the nut sleeves 17 are slidably connected to the base plate 1. In this way, when the adjusting rod 13 is rotated, the two nut sleeves 17 will not rotate with the adjusting rod 13 but will slide closer to each other along the axial direction of the adjusting rod 13. The working principle of the lead screw mechanism is well known in the art and will not be repeated here. A traction rope 18 is connected between the two sliders 5, and a sliding column 19 is slidably provided at the bottom of the base plate 1. The sliding column 19 can slide along the length direction of the base plate 1, that is, the sliding column 19 can slide in a direction perpendicular to the adjusting rod 13. A spring 6 is connected between the sliding column 19 and the base plate 1, and the middle part of the traction rope 18 is fixed on the sliding column 19. The traction rope 18 is located between the two nut sleeves 17, and the two nut sleeves 17 can slide along the axial direction of the lead screw and clamp the traction rope 18.

[0038] like Figure 3 As shown, a plurality of arranged protrusions 20 are provided on opposite sides of the two nut sleeves 17 , and the protrusions 20 on the two nut sleeves 17 are staggered, with the protrusions 20 on one nut sleeve 17 facing the gap between adjacent protrusions 20 on the other nut sleeve 17 .

[0039] like Figure 4 As shown, arc-shaped baffles 21 are provided on the two side edges of the slide rail 2, and the end of the baffle 21 away from the slide rail 2 is bent toward the center of the slide rail 2. There is a gap between the two sets of baffles 21 for the slider 5 to pass through. The lower end of the slider 5 is connected to a ball joint, and the ball is stuck in the slide rail 2 and cannot escape from the slide rail 2. The pull rope 12 is also located between the slide rail 2 and the baffle 21 and extends along the slide rail 2. Through the design of the baffle 21, the pull rope 12 will not escape from the slide rail 2, so that the pull rope 12 can only be distributed and moved along the extension direction of the slide rail 2.

[0040] like Figure 2As shown, the slide rail 2, the ratchet wheel 8, the pawl 9, the pull rope 12, and the fixing belt 7 are provided in two groups which are symmetrically distributed front and back.

[0041] In the specific implementation of this embodiment, when the patient's hand needs to be fixed, the hand passes under the two sets of fixing belts 7 and is placed on the base plate 1. Then the two sets of fixing belts 7 are adjusted respectively. When adjusting, the fixing belt 7 located on the front side of the hand, i.e. Figure 2 Taking the adjustment of the fixing belt 7 shown above as an example, the wheel disc 11 is rotated, and the wheel disc 11 drives the ratchet wheel 8 to rotate, the torsion spring connected between the ratchet wheel 8 and the base plate 1 begins to store energy, and the pawl 9 slides on the ratchet teeth of the ratchet wheel 8. The wheel disc 11 rotates and reels the pull rope 12, and the pull rope 12 is retracted. Figure 1 and Figure 4 As shown, the pull rope 12 moves between the slide rail 2 and the baffle 21, and pulls the slider 5 to slide on the slide rail 2. The slider 5 enters the arc track section 4 from the inclined track section 3 and finally moves to the bottom of the base plate 1. The state at this time is as shown in FIG. Figure 6 As shown, the fixing belt 7 is pressed on the hand, and the two ends of the fixing belt 7 are also bent toward the lower side of the base plate 1, so as to simulate the process of bandaging the patient's hand. During the process, the two sliders 5 move toward each other, and the smaller the distance between the two sliders 5, the closer the two ends of the fixing belt 7 are, and the greater the fixing force of the fixing belt 7 on the hand. Combined with the patient's feeling, when the slider 5 moves to a suitable position, the wheel 11 is released, and combined with Figure 2 It is understood that at this time, since the pawl 9 is stuck between the ratchet teeth of the ratchet 8, the ratchet 8 cannot be reversely rotated and reset under the action of the torsion spring, and the wheel 11 cannot be reversely rotated either, thereby locking the position of the slider 5, that is, fixing the positions of the two ends of the fixing belt 7 to ensure the fixation effect on the patient's hand.

[0042] Combination Figure 2 and Figure 5 It is understood that after the fixing belt 7 is adjusted, the adjusting rod 13 is rotated so that the adjusting rod 13 drives the protective cover 16 to rotate away from one end of the base plate 1 through the knot, the small gear 14 and the large gear 15, and the protective cover 16 is opened and covers the hand to isolate and protect the patient's hand. It is understood that the protective cover 16 can be made of transparent plastic film or silica gel in actual application, so that the two ends of the protective cover 16 can be telescopically folded, and it is convenient to observe the acupuncture site of the hand. After the protective cover 16 is opened, the upper end of the slide rail 2 supports it to ensure the protective effect on the hand.

[0043] Combination Figure 2It is understood that when the two sliders 5 move closer together, the tension of the traction rope 18 decreases. At this time, the sliding column 19 slides along the base plate 1 and away from the slider 5 under the action of the spring 6, thereby straightening and tightening the traction rope 18. When the adjustment rod 13 is turned to open the protective cover 16, the two nut sleeves 17 slide on the adjustment rod 13 and move closer to each other, thereby clamping and fixing the traction rope 18 to assist the ratchet 8 and the pawl 9 to lock the position of the slider 5, ensuring the fixing effect of the fixing belt 7 on the hand, and preventing the fixing belt 7 from loosening due to accidental contact with the pawl 9. It is understood that Figure 2 The upper fixing belt 7 is used to fix the patient's fingers, while the lower fixing belt 7 is used to fix the patient's wrist. In actual application, a separate nut sleeve 17 and a traction rope 18 can also be provided to assist in locking the position of the two sliders 5 below, so as to enhance the fixing effect of the lower fixing belt 7 on the wrist. This can be adjusted according to actual application requirements.

[0044] After the infusion is completed, the adjusting rod 13 is rotated in the opposite direction to fold the protective cover 16 and expose the hand. The adjusting rod 13 rotates in the opposite direction to make the two nut sleeves 17 move in opposite directions, thereby releasing the traction rope 18. Then the pawl 9 is slid to make the pawl 9 away from the ratchet 8. The ratchet 8 loses the restriction of the pawl 9 and rotates in the opposite direction to reset under the action of the torsion spring. The slider 5 also moves along the slide rail 2 to reset to the top of the slide rail 2 under the action of the spring 6. The fixing belt 7 is driven away from the hand by the slider 5, and then the hand can be taken out.

[0045] During the process of fixing the hand, if the fixing belt 7 is too tight, you can refer to the operation process after the infusion is completed, slide the pawl 9, make the ratchet 8 rotate in the opposite direction briefly, then release the pawl 9, and the pawl 9 will automatically re-engage between the ratchet teeth of the ratchet 8 under the action of the spring 6. Through the above operation, the wheel 11 will rotate in the opposite direction briefly and release a section of the pull rope 12. At this time, the slider 5 will automatically slide in the opposite direction under the action of the spring 6 and adjust its own position, thereby achieving a certain degree of relaxation of the fixing belt 7 and achieving the purpose of adjusting the fixing force of the fixing belt 7.

[0046] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A hand fixator for patient treatment, characterized in that: The invention comprises a base plate, both sides of which are fixed with slide rails, the slide rails comprising an inclined rail section and an arc rail section, the upper end of the inclined rail section protrudes from the upper surface of the base plate, the lower end of the inclined rail section is connected to the arc rail section, and the arc rail section is located below the base plate; sliders are slidably provided on the slide rails, the sliders can slide between the inclined rail section and the arc rail section, a spring is connected between the upper end of the slide rail and the slider; a fixing belt is connected between the two sliders, and the fixing belt is located above the base plate; A ratchet is rotatably provided at the bottom of the base plate, and a torsion spring is connected between the ratchet and the base plate; a pawl is provided on the outer side of the ratchet, and the pawl is inserted into the ratchet teeth of the ratchet; a mounting seat is rotatably provided on the pawl, and the mounting seat is slidably connected to the base plate along the radial direction of the ratchet, and the pawl is rotatably connected to the mounting seat, and a torsion spring is connected between the pawl and the mounting seat; A wheel disc is fixedly connected to the ratchet wheel, two pull ropes are wound around the wheel disc, and ends of the two pull ropes away from the wheel disc are fixedly connected to two sliding blocks respectively.

2. A hand fixator for patient treatment according to claim 1, characterized in that: An adjusting rod is rotatably provided at the bottom of the base plate, a knot sleeve is fixedly provided on the adjusting rod, a small gear is fixedly provided on the knot sleeve, a protective cover is fixedly connected to the end of the base plate, the protective cover can be telescopically folded, a large gear is fixedly connected to the end of the protective cover away from the base plate, the large gear is rotatably connected to the base plate, the large gear is meshed with the small gear, and the slide rail is located inside the protective cover when the protective cover is opened.

3. A hand fixator for patient treatment according to claim 2, characterized in that: The adjusting rod is a double-headed screw, both ends of which are provided with nut sleeves, the nut sleeves are threadedly connected to the screw, and the nut sleeves are slidably connected to the base plate; a traction rope is connected between the two sliders, a sliding column is slidably provided at the bottom of the base plate, the sliding column can slide along the length direction of the base plate, a spring is connected between the sliding column and the base plate, the middle part of the traction rope is fixed on the sliding column, the traction rope is located between the two nut sleeves, and the two nut sleeves can slide along the axial direction of the screw and clamp the traction rope.

4. A hand fixator for patient treatment according to claim 3, characterized in that: A plurality of arranged and distributed protrusions are arranged on opposite sides of the two nut sleeves, and the protrusions on the two nut sleeves are staggered, and a protrusion on one nut sleeve faces a gap between adjacent protrusions on the other nut sleeve.

5. A hand fixator for patient treatment according to claim 4, characterized in that: Arc-shaped baffles are arranged on both side edges of the slide rail, and a gap is provided between the two sets of baffles for the slide block to pass through. The pull rope is located between the slide rail and the baffles and extends along the slide rail.

6. A hand fixator for patient treatment according to claim 5, characterized in that: The slide rail, ratchet, pawl, pull rope and fixing belt are provided in two groups which are symmetrically distributed front and back.

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