CN117100422A - Lumbar puncture position control positioning system - Google Patents

Abstract

The application relates to the technical field of puncture row position positioning instruments, in particular to a lumbar puncture body position control positioning system, which comprises a rectangular top frame, wherein the bottoms of the two sides of the front end and the bottoms of the two sides of the rear end of the rectangular top frame are respectively and fixedly provided with a height lifting mechanism, the bottoms of the height lifting mechanisms are respectively and fixedly arranged at the tops of a displacement supporting unit below corresponding positions, the rectangular top frame and the height lifting mechanisms enclose a door-shaped space which is used for penetrating an operating table and is positioned on the periphery side and the upper side of the operating table, a positioning assembly is arranged between the two height lifting mechanisms on the outer side of the operating table opposite to the face of a patient, and a body position auxiliary position control mechanism is arranged between the positioning assembly and a bedridden patient. The application can be matched with operating tables with different heights for use, has simple and quick overall operation, can effectively realize the auxiliary control of the lateral position of a patient before the thoracic vertebra puncture operation, and better guides and assists the patient to quickly change to the correct lateral position.

Description

Lumbar puncture position control positioning system

Technical Field

The application relates to the technical field of puncture slide positioning instruments, in particular to a lumbar puncture position control positioning system.

Background

The lumbar puncture is a diagnosis and treatment operation commonly used in clinic, and can be used for diagnosing various inflammatory diseases of the central nervous system, vascular diseases, spinal cord lesions, suspected intracranial space occupying lesions, unknown nervous system diseases, qi brain, spinal angiography and the like; also can be used for treating central nervous system diseases due to excessive cerebrospinal fluid pressure by discharging (depressurizing) and injecting medicine.

At present, the puncture point is usually required to be positioned when lumbar puncture is performed, and auxiliary instruments are usually required to ensure the accuracy of puncture positioning in the prior art.

For example, patent document CN115005941a discloses a lumbar puncture positioning device for lumbar puncture surgery, which mainly comprises a bed frame, a bottom plate, a mattress, an adjusting mechanism and a locking mechanism, wherein the bottom plate for floor support is connected to the lower side of the bed frame, the mattress for making a patient more comfortable is placed on the upper part of the bed frame, and the adjusting mechanism for adjusting and positioning and the locking mechanism for locking the adjusting mechanism are arranged on the bed frame.

It can be seen from the above patent that there is a certain deficiency, the patient is positioned by the auxiliary pad before the operation, but the use effect of the positioning mode can not be adjusted when the positioning mode is used for different patients, so the positioning effect is not good, in addition, the whole auxiliary pad is installed on the operation table and needs to be matched with a special bed body for use, and the whole structure is complex and can not achieve the purpose of random matching with the use of the existing operation table.

Therefore, the invention provides a mechanical execution structure which can be universally applied to lumbar puncture to realize the position control and location of the patient body position, and is used for better solving the problems in the prior art.

Disclosure of Invention

The invention aims to solve one of the technical problems, and adopts the following technical scheme: the utility model provides a lumbar puncture position accuse position positioning system, includes rectangle top frame the front end both sides bottom and the rear end both sides bottom of rectangle top frame are fixed mounting respectively have high elevating system, four high elevating system all is in synchronous lift state under the motion state, each high elevating system's bottom is fixed mounting respectively in the top of the shift support unit of corresponding position below, rectangle top frame and each high elevating system enclose into and are used for passing the operating table and lie in its week side and the door-shaped space of top, install positioning module between two in the outside of operating table with patient's face side high elevating system be provided with position auxiliary control position mechanism between positioning module and the bedridden patient, position auxiliary control position mechanism's inner supplies the patient to grasp in order to realize controlling the position.

In any of the above schemes, preferably, the height lifting mechanism comprises an electric cylinder vertically arranged, the top of a piston rod of the electric cylinder is fixedly connected with the bottom of the rectangular top frame, and the bottom of a cylinder barrel of the electric cylinder is fixedly connected with the top of the displacement supporting unit at a corresponding position.

In any of the above schemes, preferably, the displacement supporting unit includes a horizontal pressure bearing seat, a supporting tube seat is fixedly installed at the top of the horizontal pressure bearing seat, the electric cylinder is fixedly installed at the top of the supporting tube seat, and a universal wheel with a self-locking structure is installed at the bottom of the horizontal pressure bearing seat.

In any of the above solutions, it is preferable that a positioning vertical cylinder is vertically and fixedly installed at the bottom of the horizontal pressure-bearing seat at one side of each universal wheel, and a friction ground-connecting seat is fixedly installed at the bottom of the piston rod of the positioning vertical cylinder and is used for being abutted against the ground of the operating room in the working state.

In any of the above solutions, preferably, the positioning assembly includes a vertical positioning seat vertically disposed opposite to a face of a patient in a lateral lying state, two ends of an outer side wall of the vertical positioning seat are respectively and fixedly provided with a mounting sleeve, each mounting sleeve is movably sleeved on an outer side wall of a piston rod of the electric cylinder at a corresponding position, positioning cylinders are symmetrically disposed on an inner side wall of the vertical positioning seat along a longitudinal direction thereof at intervals and about a central plane, and end parts of the piston rod of the positioning cylinders disposed horizontally are respectively connected with the body position auxiliary positioning mechanism, and the two vertical positioning seats are in a synchronous telescopic state in a working state.

In any of the above-described embodiments, it is preferable that two connection plate seats are installed between the cylinders of the two vertical positioning seats at intervals along the length direction thereof.

In any of the above solutions, preferably, the body position auxiliary position control mechanism includes a vertically disposed position supporting device, a cross section of the position supporting device in a top view state is in a semicircular arc shape, an outer arc surface of the position supporting device faces to a chest and abdomen of a patient in a patient side lying state, two ends of an inner arc surface of the position supporting device are symmetrically provided with a self-locking telescopic mechanism respectively, a main body of each self-locking telescopic mechanism is fixedly mounted at an end part of a piston rod of the position adjusting cylinder at a corresponding position respectively, an output end of each self-locking telescopic mechanism is movably hinged with a positioning hinged support on the inner arc surface of the position supporting device at the corresponding position respectively, an input end of each self-locking telescopic mechanism is controlled by a pressing engagement mechanism respectively, a control end of the pressing engagement mechanism stretches backwards and movably penetrates through a through hole on the two connecting plate supports and a through hole on the vertical positioning support, and a tail end of the pressing engagement mechanism stretches to an outer side wall of the vertical positioning support.

In any of the above solutions, preferably, the abutment device includes an arc-shaped flexible abutment guard plate, and end roller shaft portions are integrally formed at two ends of the arc-shaped flexible abutment guard plate, and the two end roller shaft portions are respectively used for holding hands and pressing thigh portions of a patient.

In any of the above schemes, preferably, the self-locking telescopic mechanism includes a screw rod mounting frame fixedly connected with the inner end of a piston rod of the positioning electric cylinder at a corresponding position, a positioning telescopic screw rod is mounted in an inner frame of the screw rod mounting frame, two ends of the positioning telescopic screw rod movably penetrate out to the outer side of the screw rod mounting frame through stepped shaft sections at the ends of the positioning telescopic screw rod respectively, a shifting slide seat is screwed on the outer side wall of the positioning telescopic screw rod in the inner frame of the screw rod mounting frame, two sides of the shifting slide seat are in butt fit on the inner side wall of the inner frame of the screw rod mounting frame, a rigid push-pull shaft is fixedly mounted at the top of the shifting slide seat, a movable hinge seat is fixedly connected with the working end of the rigid push-pull shaft, a driven bevel gear is fixedly connected with the inner end of the positioning telescopic screw rod, and the driven bevel gear is meshed with the output end of the pressing engagement mechanism and rotates along with the fixed shaft thereof when the pressing engagement mechanism runs.

In any of the above schemes, preferably, the pressing engagement mechanism includes a transmission outer tube disposed between two positioning electric cylinders, an outer end of the transmission outer tube movably passes through the through holes on the two connecting plate seats and the through holes on the vertical positioning seat, a positioning hand wheel is fixedly mounted at an end of the transmission outer tube, limiting stop rings are fixedly mounted on outer side walls of the vertical positioning seats on two sides of the vertical positioning seat respectively, an inner cavity of the transmission outer tube is a square column cavity, a square linkage shaft is inserted in the square column cavity in a matched manner, a central driving bevel gear engaged with the two driven bevel gears at corresponding positions is fixedly mounted at a working end of the square linkage shaft, and a pressing spring is sleeved on an outer side wall of the square linkage shaft between the central driving bevel gear and the transmission outer tube, and two ends of the pressing spring are respectively fixed at a rear end face of the central driving bevel gear and a front end face of the transmission outer tube.

In any of the above solutions, preferably, a safety pushing post is fixedly installed at the center of the intrados of the arc-shaped tough support guard plate on the opposite side of the central driving bevel gear, and the safety pushing post is configured to shift along with the arc-shaped tough support guard plate in a working state and is configured to press against the center of the front end surface of the central driving bevel gear, where the central driving bevel gear is forced to separate from the two driven bevel gears in a pressing state so as to prevent the arc-shaped tough support guard plate from being excessively stretched.

In any of the above schemes, preferably, a plurality of U-shaped clamping pieces for being clamped at the edge of the operating table are fixedly installed at intervals along the length direction of the bottom of each vertical positioning seat, each U-shaped clamping piece comprises a horizontally arranged U-shaped clamping seat, a supporting bolt for supporting the bottom of the edge of the operating table is screwed on the bottom of each U-shaped clamping seat, and the top of each supporting bolt extends into a U-shaped clamping cavity of each U-shaped clamping seat.

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

1. the lumbar puncture position control positioning system can be wholly shifted and locked at any time according to the use requirement, can be matched with operating tables with different heights for use, is simple and quick in overall operation, can effectively realize auxiliary position control of the lateral position of a patient before the thoracic puncture operation, better guides and assists the patient to quickly change to the correct lateral position, and is convenient for quick operation of subsequent puncture operation.

2. The lumbar puncture position control positioning system is started to operate after a patient lies on one side to the upper part of an operation bed, the whole system is controlled to move in place in a pushed state, and simultaneously, the positioning assembly is controlled to lock after the four height lifting mechanisms are in place to achieve the state of matching the current operation bed height, so that the aim of keeping the whole system stable is fulfilled, and meanwhile, the U-shaped clamping piece is used for fixedly connecting the whole system frame with the operation bed in an abutting mode, so that the stability of the whole system in operation is further ensured.

3. After the lumbar puncture position control positioning system and the operating table are in place relatively, the whole front end position supporting device is driven to be close to a patient in a lateral lying state by means of controlling the telescopic action of the position auxiliary position control mechanism, the radian and the telescopic action of the current position supporting device are controlled and adjusted according to the body characteristics of the current patient, such as height, body shape and the like, so that the patient can better match with the operating position requirement, and the aim of assisting in keeping the posture of the patient stable can be fulfilled by grasping the position supporting device.

4. The pressing engagement mechanism designed in the invention adopts a telescopic transmission mode, can keep following movement when the pressing device moves and realize synchronous engagement with two corresponding self-locking telescopic mechanisms, thereby ensuring the continuity of transmission regulation; in consideration of safety, when the position propping device is lengthened to a larger extent, the arc deformation of the position propping device can be utilized to drive the safety position pushing column in the middle to prop against the corresponding central driving bevel gear, so that the purpose of controlling the separation of the central driving bevel gear and the two driven bevel gears is achieved, and the cutting-off of driving force is controlled.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures.

In the drawings:

fig. 1 is a schematic diagram of the front view structure of the lumbar puncture posture control and positioning system of the present invention.

Fig. 2 is a schematic top view of the lumbar puncture positioning system according to the present invention.

Fig. 3 is a schematic diagram of a partial top view and enlarged structure of a positioning assembly and a body position auxiliary positioning mechanism according to the present invention.

Fig. 4 is a schematic view of a partial three-dimensional structure of the lumbar puncture posture control positioning system of the present invention.

In the figure, 1, a rectangular top frame; 2. an operating bed; 201. a bed edge; 3. a door-type space; 4. a patient side lying position; 5. an electric cylinder; 6. a horizontal pressure-bearing seat; 7. a support tube seat; 8. a universal wheel; 9. positioning a vertical cylinder; 10. friction ground connection seat; 11. a vertical positioning seat; 12. a mounting sleeve; 13. a positioning electric cylinder; 14. a connecting plate seat; 15. a positioning device; 1501. arc toughness butt guard board; 1502. an end roller shaft portion; 16. positioning a hinged support; 17. a lead screw mounting frame; 18. an inner frame; 19. a supporting telescopic screw rod; 20. a shift slide; 21. a rigid push-pull shaft; 22. moving the hinging seat; 23. a driven bevel gear; 24. a transmission outer tube; 25. a position-adjusting hand wheel; 26. a limit baffle ring; 27. square column cavity; 28. square linkage shaft; 29. a center drive bevel gear; 30. pressing the spring; 31. a safe pushing column; 32. a U-shaped clamping seat; 33. abutting the bolt; 34. u-shaped clamping cavity.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The invention provides a lumbar puncture posture control positioning system, and the specific structure is shown in figures 1-4.

Example 1: the utility model provides a lumbar puncture position accuse position positioning system, includes rectangle top frame 1 the front end both sides bottom and the rear end both sides bottom of rectangle top frame 1 are fixed mounting respectively have high elevating system, four high elevating system all is in synchronous lift state under the motion state, each high elevating system's bottom is fixed mounting respectively in the top of the shift support unit of corresponding position below, rectangle top frame 1 and each high elevating system enclose into and are used for passing operating table 2 and lie in its week side and the door space 3 of top, install locating component between the two high elevating system of the outside of operating table 2 on the side opposite to patient's face locating component is provided with position auxiliary accuse position mechanism between locating component and the bedridden patient, position auxiliary accuse position mechanism's inner supplies the patient to grasp in order to realize controlling the position. The body position control positioning system for lumbar puncture operation relies on the rectangular top frame 1 to cooperate with four high elevating mechanisms at the four corners of the bottom of the rectangular top frame to carry out integral frame construction, and meanwhile, each shift supporting unit at the four corners is supported on the ground, so that the whole structure can be ensured to form a similar portal structure to be matched with operation beds 2 with different heights, the self-locking at the positions of each shift supporting unit is controlled to realize the positioning of the whole system after the whole system moves in place, at the moment, the body position auxiliary control mechanism can be kept in a state of being supported above the bed surface of the operation bed 2 and facing to a patient in a side lying state, the patient can realize the auxiliary control position of the body position by controlling the distance between the body position auxiliary control mechanism and the patient and the shape change of the body position auxiliary control mechanism, and the patient can be enabled to realize the auxiliary control position of the body position by attaching and grasping the body position auxiliary control mechanism, so that the patient can complete the body position swing before operation more quickly and better, the body position auxiliary position control mechanism mainly plays a role in limiting and provides positioning reference objects for the patient, and meanwhile, the patient is ensured to realize the grasping stability of the patient when the patient is in side lying.

In any of the above schemes, preferably, the height lifting mechanism comprises an electric cylinder 5 vertically arranged, the top of a piston rod of the electric cylinder 5 is fixedly connected with the bottom of the rectangular top frame 1, and the bottom of a cylinder barrel of the electric cylinder 5 is fixedly connected with the top of the displacement supporting unit at a corresponding position. The lifting of the electric cylinder 5 can be controlled to effectively control the height of the positioning component and the body position auxiliary position control mechanism in the whole system according to the height of the current operating table 2, so that the aim of quickly matching the height of the current operating table 2 is effectively fulfilled.

In any of the above solutions, it is preferable that the displacement support unit includes a horizontal pressure bearing seat 6, a support tube seat 7 is fixedly installed at the top of the horizontal pressure bearing seat 6, the electric cylinder 5 is fixedly installed at the top of the support tube seat 7, and a universal wheel 8 with a self-locking structure is installed at the bottom of the horizontal pressure bearing seat 6. The shifting support unit mainly can realize quick shifting by means of movement of each universal wheel 8 under the action of following external force, and meanwhile preliminary positioning is realized by means of self-locking of the universal wheels 8 after shifting to place.

In any of the above solutions, it is preferable that a positioning vertical cylinder 9 is vertically and fixedly installed at the bottom of the horizontal pressure bearing seat 6 at one side of each universal wheel 8, and a friction ground connection seat 10 is fixedly installed at the bottom of a piston rod of the positioning vertical cylinder 9, and the friction ground connection seat 10 is used for being abutted against the ground of an operating room in an operating state. In order to ensure the stability and the firmness of positioning, the lifting of the positioning vertical cylinder 9 is adopted to realize the downward movement control of each friction ground connection seat 10 at the lower part, so that the friction ground connection seat 10 is finally contacted with the ground, and the whole structure realizes the stable support of the whole system by means of four friction ground connection seats 10 supported on the ground, thereby being matched with the self-locking of the universal wheel 8 to realize the fixation of the whole structure.

In any of the above solutions, preferably, the positioning assembly includes a vertical positioning seat 11 vertically disposed opposite to the face of the patient in the lateral lying state, two ends of an outer side wall of the vertical positioning seat 11 are respectively and fixedly provided with a mounting sleeve 12, each mounting sleeve 12 is respectively and movably sleeved on an outer side wall of a piston rod of the electric cylinder 5 at a corresponding position, positioning electric cylinders 13 are installed on an inner side wall of the vertical positioning seat 11 along a longitudinal direction at intervals and symmetrically about a central plane, and end parts of piston rods of the positioning electric cylinders 13 disposed horizontally at two ends are respectively connected with the body position auxiliary position control mechanism, and the two vertical positioning seats 11 are in a synchronous telescopic state in the working state. The positioning assembly is integrally sleeved and fixed with the outer side wall of the piston rod of the corresponding electric cylinder 5 by means of the corresponding mounting sleeve 12, so that the positioning effect of the whole vertical positioning seat 11 is guaranteed, the whole vertical positioning seat 11 can be guaranteed to be in a vertical state and at a proper height, after the height is adjusted to be in place, the two positioning electric cylinders 13 in synchronous telescopic states are started, the body position auxiliary position control mechanism at the working end part of the positioning electric cylinders 13 can be driven to be close to or far away from a patient in the current lateral position state by controlling the telescopic operation of the positioning electric cylinders 13, the upper part of the body position auxiliary position control mechanism can be gripped by the patient after the positioning electric cylinders are adjusted to be in place as required, the lower outer side wall of the body position auxiliary position control mechanism is propped against the thigh, whether the body position of the current patient meets the requirement or not is observed, and the telescopic operation body position of the patient can be controlled by controlling the body position auxiliary position control mechanism when the requirement is not met.

In any of the above solutions, preferably, the body position auxiliary position control mechanism includes a vertically disposed position supporting device 15, a cross section of the position supporting device 15 in a top view state is in a semicircular arc shape, an outer arc surface of the position supporting device 15 faces a chest and abdomen of a patient in a patient side lying state, two ends of an inner arc surface of the position supporting device 15 are symmetrically provided with a self-locking telescopic mechanism, a main body of the self-locking telescopic mechanism is fixedly mounted at an end part of a piston rod of the position adjusting cylinder 13 at a corresponding position, an output end of the self-locking telescopic mechanism is movably hinged with a positioning hinged support 16 on the inner arc surface of the position supporting device 15 at the corresponding position, an input end of the self-locking telescopic mechanism is controlled by a pressing engagement mechanism, a control end of the pressing engagement mechanism extends backwards and movably penetrates through a through hole on the two connecting plate seats 14 and a through hole on the vertical positioning seat 11, and a tail end of the pressing engagement mechanism extends to an outer side wall of the vertical positioning seat 11. The body position auxiliary position control mechanism in the system is used as a structure which is directly contacted with a patient and used as an auxiliary position control position of a patient operation, the whole body of the body position auxiliary position control mechanism is contacted with the patient by virtue of the position abutting device 15 and is gripped and held by the patient to effectively simulate the lateral lying posture of the operation, the front end of the body position auxiliary position control mechanism can be driven to be matched with the input end of the corresponding self-locking telescopic mechanism by controlling the operation of the pressing engagement mechanism according to the body state and height conditions of different patients, the purpose of driving the corresponding self-locking telescopic mechanism to realize the telescopic effect is finally achieved, when the two self-locking telescopic mechanisms are extended, the two ends of the corresponding position abutting device 15 are driven to be outwards extended, the curvature of the position abutting device 15 is reduced, and the reverse curvature is increased. The pressing and engaging mechanism adopts a unique structure capable of following expansion and keeping driving force, and can cooperate with expansion of the position-adjusting electric cylinder 13 in a certain range and keep driving control of the two self-locking expansion mechanisms.

In any of the above embodiments, it is preferable that the abutment 15 includes an arc-shaped flexible abutment guard 1501, and end roller portions 1502 are integrally formed at two ends of the arc-shaped flexible abutment guard 1501, and the two end roller portions 1502 are respectively used for grasping by hands and pressing on thigh portions of a patient. The arc-shaped flexible support guard 1501 adopted by the support 15 can have certain rigidity and can generate positioning deformation when being pushed and pulled, and considering comfort level of a patient during grasping and support, end roller shaft portions 1502 with arc radians are respectively arranged at two ends of the arc-shaped flexible support guard 1501.

In any of the above solutions, it is preferable that the self-locking telescopic mechanism includes a screw mounting frame 17 fixedly connected to the inner end of the piston rod of the positioning cylinder 13 at a corresponding position, a positioning telescopic screw 19 is mounted in an inner frame 18 of the screw mounting frame 17, two ends of the positioning telescopic screw 19 are respectively movably penetrated out to the outer side of the screw mounting frame 17 through stepped shaft sections at the ends of the positioning telescopic screw 19, a displacement slide 20 is screwed on the outer side wall of the positioning telescopic screw 19 in the inner frame 18 of the screw mounting frame 17, two sides of the displacement slide 20 are in abutting fit on the inner side wall of the inner frame 18 of the screw mounting frame 17, a rigid push-pull shaft 21 is fixedly mounted at the top of the displacement slide 20, a movable hinge seat 22 is movably hinged with the positioning hinge seat 16 at a corresponding position, a driven bevel gear 23 is fixedly connected to the inner end of the positioning telescopic screw 19, and the driven bevel gear 23 is meshed with the output end of the pressing engagement mechanism and is meshed with the fixed pressing operation shaft thereof. The self-locking telescopic mechanism in the system is mainly used as a transmission part and is used for receiving the transmission force from the output end of the abutting engagement mechanism, when the abutting engagement mechanism rotates, the corresponding driven bevel gear 23 is driven to rotate in a fixed shaft manner, the corresponding abutting telescopic lead screw 19 can be driven to rotate when the driven bevel gear 23 rotates in a fixed shaft manner, so that the transmission principle of the transmission lead screw structure is utilized to drive the shifting slide seat 20 to linearly move along the length direction, when the shifting slide seat 20 moves, the corresponding shifting hinge seat 22 is driven to link with the positioning hinge seat 16 movably hinged with the shifting slide seat to move, the purposes of adjusting the outer moving amplitude and the integral bending amplitude of the two sides of the whole arc-shaped toughness abutting guard plate 1501 are finally achieved, and the purpose of matching control is achieved by changing the bending amplitude of the corresponding arc-shaped toughness abutting guard plate 1501 according to the body state, the height and the like of different patients.

In any of the above solutions, preferably, the pressing engagement mechanism includes a transmission outer tube 24 disposed between the two positioning cylinders 13, an outer end of the transmission outer tube 24 movably passes through holes on the two connection plate bases 14 and through holes on the vertical positioning base 11, a positioning hand wheel 25 is fixedly mounted at an end of the transmission outer tube 24, limiting stop rings 26 are fixedly mounted on outer side walls of the vertical positioning base 11 on two sides of the vertical positioning base 11, an inner cavity of the transmission outer tube 24 is a square column cavity 27, a square linkage shaft 28 is inserted in the square column cavity 27 in a matched manner, a central driving bevel gear 29 for being engaged with two driven bevel gears 23 at corresponding positions is fixedly mounted at a working end of the square linkage shaft 28, a pressing spring 30 is sleeved on an outer side wall of the square linkage shaft 28 between the central driving bevel gear 29 and the transmission outer tube 24, and two ends of the pressing spring 30 are respectively fixed at a rear end face of the central driving bevel gear 29 and a front end face of the transmission outer tube 24. When the pressing engagement mechanism is operated, only the positioning hand wheel 25 is required to be rotated by medical staff according to the need, so that the aim of driving the corresponding transmission outer tube 24 to rotate in a fixed shaft is fulfilled, the corresponding square linkage shaft 28 is driven to rotate in a following manner when the transmission outer tube 24 rotates due to the square column cavity 27 in the inner cavity of the transmission outer tube 24, the central driving bevel gear 29 connected with the square linkage shaft 28 is finally driven to rotate in a fixed shaft manner, the driven bevel gears 23 which are bonded with the two sides of the corresponding bevel gears are driven to rotate in a fixed shaft manner through the fixed shaft rotation of the central driving bevel gear 29, and accordingly the corresponding self-locking telescopic mechanism is started to realize the control of the change of the distance between the two ends of the arc-shaped toughness positioning guard plate 1501 and the radian of the whole arc-shaped toughness positioning guard plate 1501.

Example 2: the utility model provides a lumbar puncture position accuse position positioning system, includes rectangle top frame 1 the front end both sides bottom and the rear end both sides bottom of rectangle top frame 1 are fixed mounting respectively have high elevating system, four high elevating system all is in synchronous lift state under the motion state, each high elevating system's bottom is fixed mounting respectively in the top of the shift support unit of corresponding position below, rectangle top frame 1 and each high elevating system enclose into and are used for passing operating table 2 and lie in its week side and the door space 3 of top, installs positioning module between two high elevating system of the outside of operating table 2 on the side opposite to patient's face positioning module and bedridden patient are provided with position auxiliary control mechanism between, position auxiliary control mechanism's inner supplies the patient grasp that is in position 4 on operating table 2 to realize controlling the position.

In any of the above schemes, preferably, the height lifting mechanism comprises an electric cylinder 5 vertically arranged, the top of a piston rod of the electric cylinder 5 is fixedly connected with the bottom of the rectangular top frame 1, and the bottom of a cylinder barrel of the electric cylinder 5 is fixedly connected with the top of the displacement supporting unit at a corresponding position.

The lifting of the electric cylinder 5 can be controlled to effectively control the height of the positioning component and the body position auxiliary position control mechanism in the whole system according to the height of the current operating table 2, so that the aim of quickly matching the height of the current operating table 2 is effectively fulfilled.

In any of the above solutions, it is preferable that the displacement support unit includes a horizontal pressure bearing seat 6, a support tube seat 7 is fixedly installed at the top of the horizontal pressure bearing seat 6, the electric cylinder 5 is fixedly installed at the top of the support tube seat 7, and a universal wheel 8 with a self-locking structure is installed at the bottom of the horizontal pressure bearing seat 6.

The shifting support unit mainly can realize quick shifting by means of movement of each universal wheel 8 under the action of following external force, and meanwhile preliminary positioning is realized by means of self-locking of the universal wheels 8 after shifting to place.

In any of the above solutions, it is preferable that a positioning vertical cylinder 9 is vertically and fixedly installed at the bottom of the horizontal pressure bearing seat 6 at one side of each universal wheel 8, and a friction ground connection seat 10 is fixedly installed at the bottom of a piston rod of the positioning vertical cylinder 9, and the friction ground connection seat 10 is used for being abutted against the ground of an operating room in an operating state.

In order to ensure the stability and the firmness of positioning, the lifting of the positioning vertical cylinder 9 is adopted to realize the downward movement control of each friction ground connection seat 10 at the lower part, so that the friction ground connection seat 10 is finally contacted with the ground, and the whole structure realizes the stable support of the whole system by means of four friction ground connection seats 10 supported on the ground, thereby being matched with the self-locking of the universal wheel 8 to realize the fixation of the whole structure.

In any of the above solutions, preferably, the positioning assembly includes a vertical positioning seat 11 vertically disposed opposite to the face of the patient in the lateral lying state, two ends of an outer side wall of the vertical positioning seat 11 are respectively and fixedly provided with a mounting sleeve 12, each mounting sleeve 12 is respectively and movably sleeved on an outer side wall of a piston rod of the electric cylinder 5 at a corresponding position, positioning electric cylinders 13 are installed on an inner side wall of the vertical positioning seat 11 along a longitudinal direction at intervals and symmetrically about a central plane, and end parts of piston rods of the positioning electric cylinders 13 disposed horizontally at two ends are respectively connected with the body position auxiliary position control mechanism, and the two vertical positioning seats 11 are in a synchronous telescopic state in the working state.

The positioning assembly is integrally sleeved and fixed with the outer side wall of the piston rod of the corresponding electric cylinder 5 by means of the corresponding mounting sleeve 12, so that the positioning effect of the whole vertical positioning seat 11 is guaranteed, the whole vertical positioning seat 11 can be guaranteed to be in a vertical state and at a proper height, after the height is adjusted to be in place, the two positioning electric cylinders 13 in synchronous telescopic states are started, the body position auxiliary position control mechanism at the working end part of the positioning electric cylinders 13 can be driven to be close to or far away from a patient in the current lateral position state by controlling the telescopic operation of the positioning electric cylinders 13, the upper part of the body position auxiliary position control mechanism can be gripped by the patient after the positioning electric cylinders are adjusted to be in place as required, the lower outer side wall of the body position auxiliary position control mechanism is propped against the thigh, whether the body position of the current patient meets the requirement or not is observed, and the telescopic operation body position of the patient can be controlled by controlling the body position auxiliary position control mechanism when the requirement is not met.

In any of the above embodiments, it is preferable that two connection plate holders 14 are installed between the cylinders of the two vertical positioning holders 11 at intervals along the length direction thereof.

The connecting plate seat 14 mainly plays a role in stabilizing the center positioning of the pressing engagement mechanism in the whole body position auxiliary position control mechanism.

In any of the above solutions, preferably, the body position auxiliary position control mechanism includes a vertically disposed position supporting device 15, a cross section of the position supporting device 15 in a top view state is in a semicircular arc shape, an outer arc surface of the position supporting device 15 faces a chest and abdomen of a patient in a patient side lying state, two ends of an inner arc surface of the position supporting device 15 are symmetrically provided with a self-locking telescopic mechanism, a main body of the self-locking telescopic mechanism is fixedly mounted at an end part of a piston rod of the position adjusting cylinder 13 at a corresponding position, an output end of the self-locking telescopic mechanism is movably hinged with a positioning hinged support 16 on the inner arc surface of the position supporting device 15 at the corresponding position, an input end of the self-locking telescopic mechanism is controlled by a pressing engagement mechanism, a control end of the pressing engagement mechanism extends backwards and movably penetrates through a through hole on the two connecting plate seats 14 and a through hole on the vertical positioning seat 11, and a tail end of the pressing engagement mechanism extends to an outer side wall of the vertical positioning seat 11.

The body position auxiliary position control mechanism in the system is used as a structure which is directly contacted with a patient and used as an auxiliary position control position of a patient operation, the whole body of the body position auxiliary position control mechanism is contacted with the patient by virtue of the position abutting device 15 and is gripped and held by the patient to effectively simulate the lateral lying posture of the operation, the front end of the body position auxiliary position control mechanism can be driven to be matched with the input end of the corresponding self-locking telescopic mechanism by controlling the operation of the pressing engagement mechanism according to the body state and height conditions of different patients, the purpose of driving the corresponding self-locking telescopic mechanism to realize the telescopic effect is finally achieved, when the two self-locking telescopic mechanisms are extended, the two ends of the corresponding position abutting device 15 are driven to be outwards extended, the curvature of the position abutting device 15 is reduced, and the reverse curvature is increased.

The pressing and engaging mechanism adopts a unique structure capable of following expansion and keeping driving force, and can cooperate with expansion of the position-adjusting electric cylinder 13 in a certain range and keep driving control of the two self-locking expansion mechanisms.

In any of the above embodiments, it is preferable that the abutment 15 includes an arc-shaped flexible abutment guard 1501, and end roller portions 1502 are integrally formed at two ends of the arc-shaped flexible abutment guard 1501, and the two end roller portions 1502 are respectively used for grasping by hands and pressing on thigh portions of a patient.

The arc-shaped flexible support guard 1501 adopted by the support 15 can have certain rigidity and can generate positioning deformation when being pushed and pulled, and considering comfort level of a patient during grasping and support, end roller shaft portions 1502 with arc radians are respectively arranged at two ends of the arc-shaped flexible support guard 1501.

In any of the above solutions, it is preferable that the self-locking telescopic mechanism includes a fixed 17 connected to the inner end of the piston rod of the positioning cylinder 13 at the corresponding position, a positioning telescopic screw 19 is mounted in the inner frame 18 of the screw mounting frame 17, two ends of the positioning telescopic screw 19 are respectively movably penetrated out to the outer side of the screw mounting frame 17 through stepped shaft sections at the ends of the positioning telescopic screw 19, a displacement slide 20 is screwed on the outer side wall of the positioning telescopic screw 19 in the inner frame 18 of the screw mounting frame 17, two sides of the displacement slide 20 are in abutting fit on the inner side wall of the inner frame 18 of the screw mounting frame 17, a rigid push-pull shaft 21 is fixedly mounted at the top of the displacement slide 20, a movable hinge seat 22 is movably hinged with the positioning hinge seat 16 at the corresponding position, a driven bevel gear 23 is fixedly connected to the inner end of the positioning telescopic screw 19, and the driven bevel gear 23 is meshed with the output end of the pressing engagement mechanism and is meshed with the fixed pressing engagement shaft thereof.

The self-locking telescopic mechanism in the system is mainly used as a transmission part and is used for receiving the transmission force from the output end of the abutting engagement mechanism, when the abutting engagement mechanism rotates, the corresponding driven bevel gear 23 is driven to rotate in a fixed shaft manner, the corresponding abutting telescopic lead screw 19 can be driven to rotate when the driven bevel gear 23 rotates in a fixed shaft manner, so that the transmission principle of the transmission lead screw structure is utilized to drive the shifting slide seat 20 to linearly move along the length direction, when the shifting slide seat 20 moves, the corresponding shifting hinge seat 22 is driven to link with the positioning hinge seat 16 movably hinged with the shifting slide seat to move, the purposes of adjusting the outer moving amplitude and the integral bending amplitude of the two sides of the whole arc-shaped toughness abutting guard plate 1501 are finally achieved, and the purpose of matching control is achieved by changing the bending amplitude of the corresponding arc-shaped toughness abutting guard plate 1501 according to the body state, the height and the like of different patients.

In any of the above solutions, preferably, the pressing engagement mechanism includes a transmission outer tube 24 disposed between the two positioning cylinders 13, an outer end of the transmission outer tube 24 movably passes through holes on the two connection plate bases 14 and through holes on the vertical positioning base 11, a positioning hand wheel 25 is fixedly mounted at an end of the transmission outer tube 24, limiting stop rings 26 are fixedly mounted on outer side walls of the vertical positioning base 11 on two sides of the vertical positioning base 11, an inner cavity of the transmission outer tube 24 is a square column cavity 27, a square linkage shaft 28 is inserted in the square column cavity 27 in a matched manner, a central driving bevel gear 29 for being engaged with two driven bevel gears 23 at corresponding positions is fixedly mounted at a working end of the square linkage shaft 28, a pressing spring 30 is sleeved on an outer side wall of the square linkage shaft 28 between the central driving bevel gear 29 and the transmission outer tube 24, and two ends of the pressing spring 30 are respectively fixed at a rear end face of the central driving bevel gear 29 and a front end face of the transmission outer tube 24.

When the pressing engagement mechanism is operated, only the positioning hand wheel 25 is required to be rotated by medical staff according to the need, so that the aim of driving the corresponding transmission outer tube 24 to rotate in a fixed shaft is fulfilled, the corresponding square linkage shaft 28 is driven to rotate in a following manner when the transmission outer tube 24 rotates due to the square column cavity 27 in the inner cavity of the transmission outer tube 24, the central driving bevel gear 29 connected with the square linkage shaft 28 is finally driven to rotate in a fixed shaft manner, the driven bevel gears 23 which are bonded with the two sides of the corresponding bevel gears are driven to rotate in a fixed shaft manner through the fixed shaft rotation of the central driving bevel gear 29, and accordingly the corresponding self-locking telescopic mechanism is started to realize the control of the change of the distance between the two ends of the arc-shaped toughness positioning guard plate 1501 and the radian of the whole arc-shaped toughness positioning guard plate 1501.

The function of the pressing spring 30 is to ensure that the square linkage shaft 28 is pushed forward and keeps the central driving bevel gear 29 engaged with the corresponding two driven bevel gears 23 when the arc-shaped flexible pressing guard 1501 moves close to the patient.

In any of the above-described aspects, it is preferable that a safety push post 31 is fixedly installed at the center of the intrados of the arc-shaped tough abutment guard 1501 on the opposite side of the center drive bevel gear 29, the safety push post 31 being displaced following the arc-shaped tough abutment guard 1501 in an operating state and being used for centrally abutting against the front end face of the center drive bevel gear 29, the center drive bevel gear 29 being forced to be separated from the two driven bevel gears 23 in an abutting state so as to prevent the arc-shaped tough abutment guard 1501 from being excessively elongated.

In view of the safety problem, the arc-shaped tough abutment guard 1501 is not easily elongated by an excessive extent, and the safety abutment guard 1501 is used to realize the backward thrust of the center drive bevel gear 29, and the arc of the arc-shaped tough abutment guard 1501 is gradually reduced when it is continuously elongated, so that the safety abutment guard 31 located at the inner side of the center continuously approaches the center drive bevel gear 29 backward and pushes the center drive bevel gear 29 backward, and finally overcomes the elasticity of the abutment spring 30 to disengage the center drive bevel gear 29 from the corresponding two driven bevel gears 23, thereby cutting off the input power of the driven bevel gears 23 and preventing the arc-shaped tough abutment guard 1501 from being excessively elongated.

In any of the above solutions, it is preferable that a plurality of U-shaped clamping members for being clamped at the bed edge 201 of the operating table 2 are fixedly installed at the bottom of each vertical positioning seat 11 along the length direction thereof at intervals, the U-shaped clamping members comprise horizontally arranged U-shaped clamping seats 32, a tightening bolt 33 for being abutted against the bottom of the edge of the operating table is screwed at the bottom of the U-shaped clamping seats 32, and the top of the tightening bolt 33 extends into the U-shaped clamping cavity 34 of the U-shaped clamping seats 32.

The specific working principle is as follows:

According to the lumbar puncture operation position control positioning system designed in the invention, the rectangular top frame 1 is matched with four height lifting mechanisms at four corners of the bottom of the rectangular top frame for integral frame construction, and meanwhile, each shift support unit at four corners is supported on the ground, so that the whole structure can be ensured to form a similar portal structure to be matched with operation beds 2 with different heights, after the whole system moves in place, the self-locking at the positions of each shift support unit is controlled to realize the positioning of the whole system, at the moment, the position auxiliary control mechanism can be kept in a state of being supported above the bed surface of the operation bed 2 and facing a patient in a side lying state, the position auxiliary control mechanism can be controlled to realize the auxiliary position control of the position by controlling the distance between the position auxiliary control mechanism and the patient and the shape change of the position auxiliary control mechanism, so that the patient can more quickly and better complete the position of the pre-operation position of the operation by attaching and grasping the position auxiliary position control mechanism, the position auxiliary position control mechanism mainly plays roles in limiting and provides a positioning reference object for the patient, and meanwhile, the patient is ensured to realize the body stability when the patient is in a side lying state.

Specifically, the body position auxiliary position control mechanism in the system is used as a structure which is directly contacted with a patient and used as an auxiliary position control position of a patient operation, the whole body of the body position auxiliary position control mechanism is contacted with the patient by virtue of the position abutting device 15 and is gripped and held by the patient to effectively simulate the lateral lying posture of the operation, the front end of the body position auxiliary position control mechanism can be driven to be matched with the input end of the corresponding self-locking telescopic mechanism by controlling the operation of the pressure abutting engagement mechanism according to the condition of the body state and the height of different patients, the purpose of driving the corresponding self-locking telescopic mechanism to realize the expansion is finally achieved, when the two self-locking telescopic mechanisms are expanded, the two ends of the corresponding position abutting device 15 are driven to be outwards expanded, the curvature of the position abutting device 15 is reduced, and conversely, the degree of reverse is increased. The self-locking telescopic mechanism is used as a transmission part and mainly receives a transmission force from the output end of the pressing engagement mechanism, when the pressing engagement mechanism rotates, the corresponding driven bevel gear 23 is driven to rotate in a fixed shaft manner, the corresponding pressing telescopic lead screw 19 can be driven to rotate when the driven bevel gear 23 rotates in a fixed shaft manner, so that the shifting slide seat 20 is driven to linearly move along the length direction by utilizing the transmission principle of the transmission lead screw structure, the corresponding shifting hinge seat 22 is driven to link with the movable hinge seat 16 to move when the shifting slide seat 20 moves, the purposes of adjusting the outer moving range and the integral bending range of the two sides of the whole arc-shaped toughness pressing guard plate 1501 are finally achieved, and the bending range of the corresponding arc-shaped toughness pressing guard plate 1501 is changed according to the body states, the heights and the like of different patients to achieve the purpose of matching control. In addition, when the pressing engagement mechanism is operated, only the positioning hand wheel 25 is required to be rotated by medical staff according to the requirement, so that the aim of driving the corresponding transmission outer tube 24 to rotate in a fixed shaft is fulfilled, and as the inner cavity of the transmission outer tube 24 is a square column cavity 27, the corresponding square linkage shaft 28 is driven to rotate in a following manner when the transmission outer tube 24 rotates, and finally the center drive bevel gear 29 connected with the square linkage shaft 28 is driven to rotate in a fixed shaft manner, and the driven bevel gear 23 bonded with the corresponding two sides of the center drive bevel gear 29 can be driven to rotate in a fixed shaft manner through the fixed shaft rotation of the center drive bevel gear 29, so that the corresponding self-locking telescopic mechanism is started to realize the control of the change of the distance between the two ends of the arc-shaped toughness positioning guard plate 1501 and the control of the radian of the whole arc-shaped toughness positioning guard plate 1501.

The whole lumbar puncture position control positioning system can be shifted and locked at any time according to the use requirement, can be matched with operating tables 2 with different heights for use, is simple and quick in whole operation, can effectively realize auxiliary position control of the lateral position of a patient before the thoracic puncture operation, better guides and assists the patient to quickly change to the correct lateral position, and is convenient for quick operation of the subsequent puncture operation; the operation is started after the patient lies on one side to the upper part of the operating table 2, the whole system is controlled to move in place in a pushed state, meanwhile, the synchronous lifting movement of the four height lifting mechanisms is used for enabling the patient to reach a state matching the height of the current operating table 2, the positioning assembly is controlled to lock after the patient is in place, so that the aim of keeping the whole system stable is achieved, and meanwhile, the U-shaped clamping piece is used for fixedly connecting the whole system frame with the operating table 2 in an abutting mode, so that the stability of the whole system in operation is further guaranteed; when the lumbar puncture position control positioning system is in place relative to the operating table 2, the expansion and contraction of the position auxiliary position control mechanism is controlled to drive the whole front position propping device 15 to be close to a patient in a lateral lying state, the radian and the expansion and contraction state of the current position propping device 15 are controlled and regulated according to the body characteristics of the current patient such as height, body shape and the like, so that the patient can better match the requirement of the operation position, and the aim of assisting in keeping the posture of the patient stable can be fulfilled by grasping the position propping device 15; the pressing engagement mechanism adopts a telescopic transmission mode, can keep following movement when the position abutting device 15 moves and is synchronously engaged with the corresponding two self-locking telescopic mechanisms, so that the continuity of transmission regulation and control is ensured; in view of safety, when the abutment 15 is elongated to a larger extent, the arc deformation of the abutment 15 is utilized to drive the central safety push post 31 to abut against the corresponding central driving bevel gear 29, thereby achieving the purpose of controlling the separation of the central driving bevel gear 29 and the two driven bevel gears 23 and controlling the interception of driving force.

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

The above description is not intended to limit the scope of the application, but is intended to cover any modifications, equivalents, and improvements within the spirit and principles of the application.

Claims (9)

1. A lumbar puncture positioning system, the system comprising: the device comprises a rectangular top frame, wherein the bottoms of the two sides of the front end and the bottoms of the two sides of the rear end of the rectangular top frame are respectively and fixedly provided with a height lifting mechanism, the four height lifting mechanisms are in synchronous lifting states in a moving state, the bottoms of the height lifting mechanisms are respectively and fixedly arranged at the tops of a displacement supporting unit below corresponding positions, the rectangular top frame and the height lifting mechanisms enclose a door-shaped space which is used for penetrating an operating table and is positioned on the periphery side and the upper side of the operating table, a positioning assembly is arranged between the two height lifting mechanisms on the outer side of the operating table opposite to the face of a patient, and a body position auxiliary position control mechanism is arranged between the positioning assembly and a bedridden patient and is used for being gripped by the patient to control the body position.

2. The lumbar puncture positioning system according to claim 1, wherein the height lifting mechanism comprises an electric cylinder which is vertically arranged, the top of a piston rod of the electric cylinder is fixedly connected with the bottom of the rectangular top frame, and the bottom of a cylinder barrel of the electric cylinder is fixedly connected with the top of the displacement supporting unit at a corresponding position.

3. The lumbar puncture positioning system according to claim 2, wherein the displacement support unit comprises a horizontal pressure bearing seat, a support tube seat is fixedly arranged at the top of the horizontal pressure bearing seat, the electric cylinder is fixedly arranged at the top of the support tube seat, and a universal wheel with a self-locking structure is arranged at the bottom of the horizontal pressure bearing seat.

4. A lumbar puncture positioning system according to claim 3, wherein a positioning cylinder is fixedly installed vertically at the bottom of the horizontal pressure bearing seat at one side of each universal wheel, and a friction ground connection seat is fixedly installed at the bottom of the piston rod of the positioning cylinder and is used for being abutted against the ground of an operating room in an operating state.

5. The lumbar puncture positioning system according to claim 4, wherein: the positioning assembly comprises a vertical positioning seat which is vertically arranged opposite to the face of a patient in a lateral lying state, two ends of the outer side wall of the vertical positioning seat are respectively and fixedly provided with a mounting sleeve, each mounting sleeve is respectively and movably sleeved on the outer side wall of a piston rod of the electric cylinder at a corresponding position, positioning electric cylinders are symmetrically arranged on the inner side wall of the vertical positioning seat along the length direction of the inner side wall of the vertical positioning seat at intervals and about the central plane, the end parts of the piston rods of the positioning electric cylinders which are horizontally arranged are respectively connected with the body position auxiliary position control mechanism, and the two vertical positioning seats are in a synchronous telescopic state in a working state.

6. The lumbar puncture positioning system according to claim 5, wherein two connection plate seats are installed between the cylinder barrels of the two vertical positioning seats at intervals along the length direction thereof.

7. The lumbar puncture position control positioning system according to claim 6, wherein the position auxiliary position control mechanism comprises a vertically arranged position supporting device, the cross section of the position supporting device in a overlooking state is semicircular arc, the outer arc surface of the position supporting device faces the chest and abdomen of a patient in a patient side lying state, two ends of the inner arc surface of the position supporting device are symmetrically provided with a self-locking telescopic mechanism respectively, the main body of each self-locking telescopic mechanism is fixedly arranged at the end part of a piston rod of the position adjusting electric cylinder at the corresponding position, the output end of each self-locking telescopic mechanism is movably hinged with a positioning hinged seat on the inner arc surface of the position supporting device at the corresponding position, the input end of each self-locking telescopic mechanism is controlled by a pressing engagement mechanism respectively, the control end of the pressing engagement mechanism stretches backwards and moves through the through holes on the two connecting plate seats and the through holes on the vertical positioning seat, and the tail end of the pressing engagement mechanism stretches to the outer side wall of the vertical positioning seat.

8. The lumbar puncture positioning system according to claim 7, wherein the positioning device comprises an arc-shaped flexible positioning guard plate, and end roller shafts are integrally formed at two ends of the arc-shaped flexible positioning guard plate, and the two end roller shafts are respectively used for grasping hands and pressing thigh parts of a patient.

9. The lumbar puncture position control positioning system according to claim 8, wherein the self-locking telescopic mechanism comprises a screw rod installation frame fixedly connected with the inner end of a piston rod of the position adjusting electric cylinder at a corresponding position, a position supporting telescopic screw rod is installed in the inner frame of the screw rod installation frame, two ends of the position supporting telescopic screw rod movably penetrate to the outer side of the screw rod installation frame through stepped shaft sections at the end parts of the position supporting telescopic screw rod respectively, a displacement sliding seat is screwed on the outer side wall of the position supporting telescopic screw rod in the inner frame of the screw rod installation frame, two sides of the displacement sliding seat are in butt fit on the inner side wall of the inner frame of the screw rod installation frame, a rigid push-pull shaft is fixedly installed at the top of the displacement sliding seat, a movable hinge seat is movably hinged with the positioning hinge seat at the corresponding position, a driven bevel gear is fixedly connected with the inner end of the position supporting telescopic screw rod, and the driven bevel gear is meshed with the output end of the position supporting and rotates along with the position supporting and pressing engagement mechanism.