Lumbar puncture body position maintaining device

Abstract

The utility model relates to a lumbar puncture body position maintaining device which comprises a trunk upper end fixator used for being fixed to the upper end of a trunk. The trunk lower end fixer is fixed at the lower end of the trunk; the inhaul cable winder is used for winding the inhaul cable; the upper inhaul cable is used for connecting the trunk upper end fixer with the inhaul cable winder; the lower inhaul cable is used for connecting the trunk lower end fixer with the inhaul cable winder; a user can lie on the rack on the side, and the inhaul cable winder is arranged on the rack. The utility model aims to provide the lumbar puncture body position maintaining device which can enable a user to reliably maintain the lumbar puncture body position, and solves the problem that the lumbar puncture body position cannot be kept stable when the user automatically curls to maintain the lumbar puncture body position.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a lumbar puncture position maintenance device. Background Technology

[0002] In procedures such as lumbar puncture, the user's torso needs to be curled up to create a lumbar lordosis, facilitating manipulation of the lumbar spine (e.g., during lumbar massage). For ease of understanding, this curled-up position is referred to as the lumbar puncture position, but it is not the only position used for lumbar puncture. Current methods for creating a lumbar lordosis involve the user curling their torso. This method has the following drawbacks: changes in the user's curling force alter the lumbar lordosis, making it impossible to maintain a constant position. Utility Model Content

[0003] The present invention aims to provide a lumbar puncture position maintenance device that enables users to reliably maintain the lumbar puncture position, and solves the problem that the user cannot maintain stability when using self-curling to maintain the lumbar puncture position.

[0004] The above technical problems are solved by the following technical solution: a lumbar puncture position maintenance device, characterized in that it includes an upper trunk fixator for fixing to the upper end of the trunk; a lower trunk fixator for fixing to the lower end of the trunk; a cable winder for winding a cable; an upper cable for connecting the upper trunk fixator to the cable winder; a lower cable for connecting the lower trunk fixator to the cable winder; and a platform for the user to lie on their side, on which the cable winder is disposed; the lumbar puncture position maintenance device maintains the human body in a lumbar position. The puncture position method is as follows: the upper torso fixator is fixed to the upper end of the user's torso, and the lower torso fixator is fixed to the lower end of the user's torso. The user lies on their side on the platform facing the cable retractor. The cable retractor is connected to the front of the upper torso fixator by the upper cable and to the lower torso fixator by the lower cable. The upper and lower cables are wound by the cable retractor. Then, by driving the upper and lower torso fixators, the upper and lower ends of the user's torso are brought together to a certain distance, so that the user is in a curled position with a set bow angle.

[0005] Preferably, the upper torso fixator includes two shoulder fixation rings correspondingly fitted onto the two shoulder joints, a rear transverse connecting strap connecting the rear sides of the two shoulder fixation rings together, and a front transverse connecting strap connecting the front sides of the two shoulder fixation rings together. One end of the upper pull cable is connected to the front transverse connecting strap. The two shoulder fixation rings are symmetrically distributed on both sides of the front-rear vertical plane passing through the connection point of the upper pull cable and the front transverse connecting strap. In use, the user's two hands are inserted into the two shoulder fixation rings one by one until the shoulder fixation rings are fitted onto the shoulders. At this time, the rear transverse connecting strap is located on the user's back, and the front transverse connecting strap is located above the user's chest, thus ensuring that the upper torso fixator will not shift or fall off when the upper torso is pulled by the upper torso fixator. It can be conveniently and reliably fixed to the upper torso. The fact that "the two shoulder fixation rings are symmetrically distributed on both sides of the front-rear vertical plane passing through the connection point of the upper pull cable and the front transverse connecting strap" means that the force that twists the torso when the pull cable is pulled is small, and the main function of the force is to drive the torso to bend.

[0006] Preferably, the lower torso fixator includes a waist hoop and hip fixation rings correspondingly fitted onto the two hip joints. Each hip fixation ring is connected to the waist hoop via a connecting cable. One end of the pull cable is connected to the front of the waist hoop. The two hip fixation rings are symmetrically distributed on both sides of the vertical plane anterior-posterior to posterior to the connection point between the pull cable and the waist hoop. In use, the user's two feet are inserted into the two hip fixation rings until they are fitted onto the hip joints. Then, the waist hoop is fixed below the user's waist with the connecting cable taut, thus preventing the lower torso fixator from shifting or falling off when the lower torso is pulled. It can be conveniently and reliably fixed to the upper torso. The symmetrical distribution of the two hip fixation rings on both sides of the vertical plane anterior-posterior to the connection point between the pull cable and the waist hoop minimizes the force required to twist the torso when the pull cable is pulled down, with the force primarily driving the torso to bend.

[0007] Preferably, the two connecting cables are positioned behind the user during use. This improves the reliability of the lower torso fixation device when it is secured to the torso and enhances user comfort.

[0008] Preferably, the cable winder includes a cylindrical housing fixed on the platform, a rotating shaft passing through the housing, an upper cable winding disc connected to the rotating shaft, and a lower cable winding disc connected to the rotating shaft. The lower end of the rotating shaft is rotatably connected to the platform, and the upper end extends out of the housing. The circumferential surface of the housing is provided with an upper cable through hole and a lower cable through hole. The upper cable passes through the upper cable through hole and is fixed together with the upper cable winding disc. The lower cable passes through the lower cable through hole and is fixed together with the lower cable winding disc. In use, rotating the rotating shaft causes the upper cable winding disc and the lower cable winding disc to rotate, thereby causing the upper cable to wind onto the upper cable winding disc, thus driving the upper end of the torso to bend towards the front of the torso, and the lower cable to wind onto the lower cable winding disc, thus driving the lower end of the torso to bend towards the front of the torso.

[0009] Preferably, the upper cable winding reel has an annular upper cable receiving cavity extending circumferentially along the upper cable winding reel. The annular upper cable receiving cavity has an upper cable through-hole in the winding reel section. The upper cable passes through the upper cable through-hole in the housing section and the cable through-hole in the winding reel section sequentially before being fixed within the annular upper cable receiving cavity. Similarly, the lower cable winding reel has an annular lower cable receiving cavity extending circumferentially along the lower cable winding reel. The annular lower cable receiving cavity has a lower cable through-hole in the winding reel section. The lower cable passes through the lower cable through-hole in the housing section and the cable through-hole in the winding reel section sequentially before being fixed within the annular lower cable receiving cavity. In use, the upper cable is wound within the annular upper cable receiving cavity, and the lower cable is wound within the annular lower cable receiving cavity. This ensures that the cable is reliably wound onto the winding reel, preventing it from getting stuck between the winding reel and the housing.

[0010] Preferably, the inner circumferential surface of the housing is provided with a lower annular limiting groove and an upper annular limiting groove extending circumferentially along the housing. The outer edge of the upper cable winding disc passes through the upper annular limiting groove, and the outer edge of the lower cable winding disc passes through the lower annular limiting groove. The center of the upper cable winding disc is provided with an upper cable winding disc spline hole, and the center of the lower cable winding disc is provided with a lower cable winding disc spline hole. The rotating shaft is provided with a lower spline section and an upper spline section. The upper spline section passes through the upper cable winding disc spline hole, and the length of the upper spline section is greater than the depth of the upper cable winding disc spline hole. The lower spline section passes through the lower cable winding disc spline hole. The length of the upper spline section is greater than the depth of the spline hole in the lower cable winding reel. The shaft is insertably inserted into the housing. When the shaft moves upward until the upper spline section abuts against the top wall of the housing, the upper spline section disengages from the spline hole in the upper cable winding reel while the lower spline section remains inserted within the spline hole in the lower cable winding reel. When the shaft moves downward until the lower spline section abuts against the bottom wall of the housing, the lower spline section disengages from the spline hole in the lower cable winding reel while the upper spline section remains inserted within the spline hole in the upper cable winding reel. In use, when it is necessary to independently wind one of the upper or lower cables to adjust the bending state of the torso, the shaft is inserted or removed to engage the winding reel that drives only the cable to be wound with the spline section. Independent bending of the upper and lower ends of the torso is possible.

[0011] Preferably, the system also includes an upper horizontal pressing plate, a lower horizontal pressing plate, a vertical connecting plate whose lower end is connected to the upper horizontal pressing plate, a horizontal push-pull rod with an elongated clearance hole at one end connected to the upper end of the vertical connecting plate, a vertical threaded rod whose upper end passes through the elongated clearance hole, a fixed seat connected to the housing, and a double-ended screw with one end threaded to the fixed seat. The lower end of the vertical threaded rod is threaded to the top wall of the housing. The vertical threaded rod has a lower limit protrusion supporting the horizontal push-pull rod and an upper limit protrusion located above the horizontal push-pull rod. The other end of the double-ended screw is threaded to a connecting lug provided on the horizontal push-pull rod. The elongated clearance hole extends along the extension direction of the horizontal push-pull rod. The double-ended screw and water... The push rods are parallel, and the upper and lower horizontal pressure plates are connected at both ends by an arched connecting piece that arches away from the housing. In use, the user, lying on their side on the platform, is positioned between the upper horizontal pressure plate and the cable reel winding device. The area of ​​the lumbar spine requiring puncture and the position of the upper horizontal pressure plate between the two arched connecting pieces are on the same vertical plane. The height of the upper and lower horizontal pressure plates is adjusted by changing the depth of the vertical threaded rod screwed into the housing until the gap between them aligns with the user's lumbar spine. Adjusting the double-ended screw allows the upper and lower horizontal pressure plates to press on the areas on either side of the lumbar spine, thus causing the puncture site to protrude. This makes puncture easier.

[0012] Preferably, the lower edge of the surface of the upper horizontal pressing plate facing the housing and the upper edge of the surface of the lower horizontal pressing plate facing the housing are located on the same vertical plane. This allows for more even pressure on both sides of the lumbar spine.

[0013] Preferably, the surface of the upper horizontal pressing plate facing the housing is an inclined surface with its upper end away from the housing and its lower end close to the housing, and the surface of the lower horizontal pressing plate facing the housing is an inclined surface with its lower end away from the housing and its upper end close to the housing. The inclination angles of the surfaces of the upper and lower horizontal pressing plates facing the housing are equal. This allows for a more reliable protrusion of the spine from the user's back.

[0014] This invention has the following advantages: it can reliably keep the user in the required curled-up position, thereby maintaining the stability of the lumbar puncture position. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the usage state of Embodiment 1 of this utility model;

[0016] Figure 2 for Figure 1 A-A sectional view;

[0017] Figure 3 This is a top view of the cable winder in Example 2;

[0018] Figure 4 for Figure 3 Schematic diagram of B-B section.

[0019] In the diagram: 1. Upper torso fixation device; 2. Torso; 3. Lower torso fixation device; 4. Cable winder; 5. Upper cable; 6. Lower cable; 7. Platform; 8. User; 9. Shoulder fixation ring; 10. Rear transverse connecting strap; 11. Front transverse connecting strap; 12. Hand; 13. Waist hoop; 14. Hip fixation ring; 15. Connecting cable; 46. Foot; 16. Housing; 17. Rotating shaft; 18. Upper cable winding disc; 19. Lower cable winding disc; 20. Upper cable through hole in housing; 21. Lower cable through hole in housing; 22. Annular upper cable receiving cavity; 23. Upper cable through hole in winding disc; 24. Annular lower cable receiving cavity; 25. Lower cable through hole in winding disc. 5. Lower annular limiting groove 26, upper annular limiting groove 27, lower spline section 28, upper spline section 29, top wall of housing 30, bottom wall of housing 31, handle 47, connecting sleeve 48, locking bolt 49, upper horizontal pressing plate 32, lower horizontal pressing plate 33, vertical connecting plate 34, elongated clearance hole 35, horizontal push-pull rod 36, vertical threaded rod 37, fixing seat 38, double-ended screw 39, lower limiting protrusion 40, upper limiting protrusion 41, connecting ear 42, arched connecting plate 43, surface of upper horizontal pressing plate facing the housing side 44, surface of lower horizontal pressing plate facing the housing side 45. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1, see Figure 1 and Figure 2 A lumbar puncture positioning maintenance device includes an upper trunk fixator 1 for fixing to the upper end of the torso 2; a lower trunk fixator 3 for fixing to the lower end of the torso; a cable winder 4 for winding a cable; an upper cable 5 for connecting the upper trunk fixator to the cable winder; a lower cable 6 for connecting the lower trunk fixator to the cable winder; and a platform 7 for the user 8 to lie on their side, on which the cable winder is mounted. The method for maintaining the body in the lumbar puncture position using the lumbar puncture positioning maintenance device is as follows: the upper trunk fixator is fixed to the upper end of the user's torso, and the lower trunk fixator is fixed to the lower end of the user's torso. The user lies on their side on the platform facing the cable winder. The cable winder (which is always connected to the cable winder but detachably connected to the upper torso fixation device) is connected to the front of the upper torso fixation device via the upper cable. The cable winder (which is always connected to the cable winder but detachably connected to the lower torso fixation device) is connected to the lower torso fixation device via the lower cable winder. The upper and lower cables are wound by the cable winder, which in turn drives the upper and lower torso fixation devices to bring the user's torso to a certain distance, thus placing the user in a curled posture with a set arc.

[0022] The upper torso fixation device includes two shoulder fixation rings 9 that are fitted onto the two shoulder joints, a rear transverse connecting strap 10 that connects the rear sides of the two shoulder fixation rings together, and a front transverse connecting strap 11 that connects the front sides of the two shoulder fixation rings together. One end of the upper cable is detachably connected to the front transverse connecting strap (e.g., by tying a slipknot). The two shoulder fixation rings are symmetrically distributed on both sides of the front and rear vertical plane passing through the connection point between the upper cable and the front transverse connecting strap. In use, the user's two hands 12 are inserted into the two shoulder fixation rings one by one until the shoulder fixation rings are fitted onto the shoulders. At this time, the rear transverse connecting strap is located on the user's back, and the front transverse connecting strap is located above the user's chest, thus ensuring that the upper torso fixation device will not shift or fall off when the upper torso is pulled by the upper torso fixation device. The lower torso fixation device includes a waist hoop 13 and hip fixation rings 14 correspondingly fitted onto the two hip joints. Each hip fixation ring is connected to the waist hoop via a connecting cable 15. One end of the pull cable is detachably connected to the front of the waist hoop. The two hip fixation rings are symmetrically distributed on both sides of the vertical plane anterior and posterior to the connection point between the pull cable and the waist hoop. In use, the user's two feet 46 are inserted into the two hip fixation rings until they are fitted onto the hip joints. The waist hoop is then fixed below the user's waist with the connecting cables taut, thus preventing displacement or detachment of the lower torso fixation device when the lower torso is pulled. It can be conveniently and reliably fixed to the upper torso. The two connecting cables are located behind the user during use. Figure 1 (It was drawn on the side of the user for easier observation).

[0023] The cable winder includes a cylindrical housing 16 fixed on a frame, a rotating shaft 17 passing through the housing, an upper cable winding disc 18 connected to the rotating shaft, and a lower cable winding disc 19 connected to the rotating shaft. The lower end of the rotating shaft is rotatably connected to the frame, and the upper end extends out of the housing. The housing has an upper cable through hole 20 and a lower cable through hole 21 on its circumferential surface. The upper cable winding disc has an annular upper cable receiving cavity 22 extending circumferentially along the upper cable winding disc, and the annular upper cable receiving cavity has an upper cable through hole 23 on the winding disc. The upper cable passes through the upper cable through hole in the housing and the cable through hole in the winding disc in sequence and is then fixed in the annular upper cable receiving cavity. The lower cable winding disc has an annular lower cable receiving cavity 24 extending circumferentially along the lower cable winding disc, and the annular lower cable receiving cavity has a lower cable through hole 25 on the winding disc. After passing through the cable through-hole in the housing and the cable through-hole in the winding disc, the cable is fixed in the annular cable receiving cavity. In use, rotating the shaft causes the upper cable winding disc and the lower cable winding disc to rotate, thereby causing the upper cable to wind into the annular upper cable receiving cavity of the upper cable winding disc, thus driving the upper end of the torso to bend towards the front of the torso, and the lower cable to wind into the annular lower cable receiving cavity of the lower cable winding disc, thus driving the lower end of the torso to bend towards the front of the torso. The inner circumferential surface of the housing is provided with a lower annular limiting groove 26 and an upper annular limiting groove 27 extending circumferentially along the housing. The outer edge of the upper cable winding disc passes through the upper annular limiting groove, and the outer edge of the lower cable winding disc passes through the lower annular limiting groove. The center of the upper cable winding disc is provided with a spline hole for the upper cable winding disc, and the center of the lower cable winding disc is provided with a spline hole for the lower cable winding disc. The rotating shaft is provided with a lower spline section 28 and an upper spline section 29. The upper spline section passes through the spline hole for the upper cable winding disc, and the length of the upper spline section is greater than the depth of the spline hole for the upper cable winding disc. The lower spline section passes through the spline hole for the lower cable winding disc, and the length of the lower spline section is greater than the depth of the spline hole for the lower cable winding disc. The rotating shaft is pluggably inserted into the housing. When the shaft moves upward until the upper spline section abuts against the top wall 30 of the housing, the upper spline section disengages from the spline hole of the upper cable winding disc while the lower spline section remains inserted in the spline hole of the lower cable winding disc. When the shaft moves downward until the lower spline section abuts against the bottom wall 31 of the housing, the lower spline section disengages from the spline hole of the lower cable winding disc while the upper spline section remains inserted in the spline hole of the upper cable winding disc. In use, when it is necessary to independently wind one of the upper or lower cables to adjust the bending state of the shaft, the winding disc that drives only the cable to be wound is engaged with the spline section by pulling the shaft. A handle 47 is provided at the upper end of the shaft. A connecting sleeve 48 is fixed on the upper surface of the top wall of the housing and fitted onto the shaft. A locking bolt 49 is threaded onto the connecting sleeve. When the locking bolt is tightened, the shaft is fixed and cannot be raised, lowered, or rotated.

[0024] Example 2 differs from Example 1 in that:

[0025] See Figure 3 and Figure 4It also includes an upper horizontal pressing plate 32, a lower horizontal pressing plate 33, a vertical connecting plate 34 whose lower end is connected to the upper horizontal pressing plate, a horizontal push-pull rod 36 with an elongated clearance hole 35 connected to the upper end of the vertical connecting plate, a vertical threaded rod 37 whose upper end passes through the elongated clearance hole, a fixing seat 38 connected to the housing, and a double-ended screw 39 whose one end is threaded to the fixing seat. The lower end of the vertical threaded rod is threaded to the top wall of the housing. The vertical threaded rod has a lower limit protrusion 40 supporting the horizontal push-pull rod and an upper limit protrusion 41 located above the horizontal push-pull rod. The other end of the double-ended screw is threaded to a connecting lug 42 provided on the horizontal push-pull rod. The elongated clearance hole extends along the extension direction of the horizontal push-pull rod. The double-ended screw is parallel to the horizontal push-pull rod. The two ends of the upper and lower horizontal pressing plates are each connected together by an arched connecting plate 43 that arches away from the housing. In use, it lies on its side on the table. The user is positioned between the upper horizontal pressing plate and the cable reel. The area of ​​the lumbar spine requiring puncture and the upper horizontal pressing plate located between the two arched connecting plates are on the same vertical plane. The height of the upper and lower horizontal pressing plates is adjusted by changing the depth of the vertical threaded rod screwed into the housing until the gap between the upper and lower horizontal pressing plates is aligned with the user's lumbar spine. The double-ended screw is adjusted so that the upper and lower horizontal pressing plates press on the back areas on both sides of the lumbar spine, thereby causing the puncture site of the lumbar spine to protrude. The lower edge of the surface of the upper horizontal pressing plate facing the housing and the upper edge of the surface of the lower horizontal pressing plate facing the housing are on the same vertical plane. Surface 44 of the upper horizontal pressing plate facing the housing is an inclined surface with its upper end away from the housing and its lower end close to the housing, while surface 45 of the lower horizontal pressing plate facing the housing is an inclined surface with its lower end away from the housing and its upper end close to the housing. The inclination angles of the surfaces of the upper and lower horizontal pressing plates facing the housing are equal.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lumbar puncture position maintenance device, characterized in that, It includes an upper torso fixator for securing to the upper end of the torso; a lower torso fixator for securing to the lower end of the torso; a cable winder for winding the cable; an upper cable for connecting the upper torso fixator to the cable winder; a lower cable for connecting the lower torso fixator to the cable winder; and a platform for the user to lie on their side, on which the cable winder is mounted.

2. The lumbar puncture position maintenance device according to claim 1, characterized in that, The upper torso fixation device includes two shoulder fixation rings that are fitted onto the two shoulder joints in a one-to-one correspondence, a rear transverse connecting strap that connects the rear sides of the two shoulder fixation rings together, and a front transverse connecting strap that connects the front sides of the two shoulder fixation rings together. One end of the upper cable is connected to the front transverse connecting strap. The two shoulder fixation rings are symmetrically distributed on both sides of the front and rear vertical plane passing through the connection point of the upper cable and the front transverse connecting strap.

3. A lumbar puncture position maintenance device according to claim 1 or 2, characterized in that, The lower torso fixation device includes a waist hoop and hip fixation rings that are fitted onto the two hip joints one to one. The two hip fixation rings are connected to the waist hoop by a connecting cable. One end of the pull cable is connected to the front side of the waist hoop. The two hip fixation rings are symmetrically distributed on both sides of the front and rear vertical plane passing through the connection point between the pull cable and the waist hoop.

4. The lumbar puncture position maintenance device according to claim 3, characterized in that, The two connecting cables are positioned behind the user during use.

5. The lumbar puncture position maintenance device according to claim 1, characterized in that, The cable winder includes a cylindrical housing fixed on the platform, a rotating shaft passing through the housing, an upper cable winding disc connected to the rotating shaft, and a lower cable winding disc connected to the rotating shaft. The lower end of the rotating shaft is rotatably connected to the platform, and the upper end extends out of the housing. The circumferential surface of the housing is provided with an upper cable through hole and a lower cable through hole. The upper cable passes through the upper cable through hole and is fixed together with the upper cable winding disc. The lower cable passes through the lower cable through hole and is fixed together with the lower cable winding disc.

6. The lumbar puncture position maintenance device according to claim 5, characterized in that, The upper cable winding reel has an annular upper cable receiving cavity extending circumferentially along the upper cable winding reel. The annular upper cable receiving cavity has an upper cable through hole in the winding reel section. The upper cable passes through the upper cable through hole in the housing section and the cable through hole in the winding reel section in sequence and is then fixed in the annular upper cable receiving cavity. The lower cable winding reel has an annular lower cable receiving cavity extending circumferentially along the lower cable winding reel. The annular lower cable receiving cavity has a lower cable through hole in the winding reel section. The lower cable passes through the lower cable through hole in the housing section and the cable through hole in the winding reel section in sequence and is then fixed in the annular lower cable receiving cavity.

7. A lumbar puncture position maintenance device according to claim 5 or 6, characterized in that, The inner circumferential surface of the housing is provided with a lower annular limiting groove and an upper annular limiting groove extending circumferentially along the housing. The outer edge of the upper cable winding disc passes through the upper annular limiting groove, and the outer edge of the lower cable winding disc passes through the lower annular limiting groove. The center of the upper cable winding disc is provided with an upper cable winding disc spline hole, and the center of the lower cable winding disc is provided with a lower cable winding disc spline hole. The rotating shaft is provided with a lower spline section and an upper spline section. The upper spline section passes through the upper cable winding disc spline hole, and the length of the upper spline section is greater than that of the upper cable winding disc spline hole. The lower spline segment is inserted into the spline hole of the lower cable winding disc, and the length of the lower spline segment is greater than the depth of the spline hole of the lower cable winding disc. The rotating shaft is inserted into the housing in a pluggable manner. When the rotating shaft moves upward to the point where the upper spline segment abuts against the top wall of the housing, the upper spline segment disengages from the spline hole of the upper cable winding disc while the lower spline segment remains inserted into the spline hole of the lower cable winding disc. When the rotating shaft moves downward to the point where the lower spline segment abuts against the bottom wall of the housing, the lower spline segment disengages from the spline hole of the lower cable winding disc while the upper spline segment remains inserted into the spline hole of the upper cable winding disc.

8. A lumbar puncture position maintenance device according to claim 5 or 6, characterized in that, It also includes an upper horizontal pressing plate, a lower horizontal pressing plate, a vertical connecting plate whose lower end is connected to the upper horizontal pressing plate, a horizontal push-pull rod with an elongated clearance hole connected to the upper end of the vertical connecting plate, a vertical threaded rod whose upper end passes through the elongated clearance hole, a fixed seat connected to the housing, and a double-ended screw whose one end is threaded to the fixed seat. The lower end of the vertical threaded rod is threaded to the top wall of the housing. The vertical threaded rod has a lower limit protrusion supporting the horizontal push-pull rod and an upper limit protrusion located above the horizontal push-pull rod. The other end of the double-ended screw is threaded to a connecting lug provided on the horizontal push-pull rod. The elongated clearance hole extends along the extension direction of the horizontal push-pull rod. The double-ended screw is parallel to the horizontal push-pull rod. The two ends of the upper and lower horizontal pressing plates are each connected together by an arched connecting plate that arches away from the housing.

9. A lumbar puncture position maintenance device according to claim 8, characterized in that, The lower edge of the surface of the upper horizontal pressing piece facing the housing and the upper edge of the surface of the lower horizontal pressing piece facing the housing are located on the same vertical plane.

10. A lumbar puncture position maintenance device according to claim 8, characterized in that, The surface of the upper horizontal pressing plate facing the housing is an inclined surface with its upper end away from the housing and its lower end close to the housing. The surface of the lower horizontal pressing plate facing the housing is an inclined surface with its lower end away from the housing and its upper end close to the housing. The inclination angle of the surface of the upper horizontal pressing plate facing the housing is equal to the inclination angle of the surface of the lower horizontal pressing plate facing the housing.

Images