CN113082429A

CN113082429A - Trachea cannula integral type fixing device for department of respiration

Info

Publication number: CN113082429A
Application number: CN202110379896.9A
Authority: CN
Inventors: 李兆蕾
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2021-07-09

Abstract

The invention discloses an integrated fixing device for trachea cannula for department of respiration, which belongs to the technical field of medical apparatus and comprises two groups of oral cavity base plates, wherein both ends of the oral cavity base plates are fixedly connected with rear tooth pads, the inner ends of the oral cavity base plates are fixedly connected with fixed side plates, the middle parts of the fixed side plates are slidably connected with fixed base tubes, the middle parts of the fixed side plates are slidably connected with positioning shifting blocks, both side walls of the fixed base tubes are fixedly connected with positioning toothed plates, both upper and lower side walls of the fixed base tubes are fixedly connected with movable tooth pads, movable inner tubes are connected in the fixed base tubes in a spherical mode, the ends of the movable inner tubes are fixedly provided with clamping pipe fittings, the tops of the fixed base tubes are in threaded connection with positioning bolts, the tops of the fixed base tubes are slidably connected with movable racks, the side walls of the, reducing the workload of medical staff and relieving the discomfort of patients.

Description

Trachea cannula integral type fixing device for department of respiration

Technical Field

The invention relates to the technical field of medical instruments, in particular to an integrated fixing device for a trachea cannula for a respiratory department.

Background

With the rapid development of emergency treatment technology, the requirement on the integration level of various devices required for rescuing critically ill patients is higher and higher, tracheal intubation is an important measure for rescuing critically ill patients, and tracheal intubation refers to the insertion of a special tracheal catheter into the trachea of a patient through the oral cavity or the nasal cavity, is a technique for endotracheal anesthesia and patient rescue, is the most reliable means for keeping the upper respiratory tract unblocked, and is mainly used for medical technologies such as clinical emergency resuscitation, respiratory muscle paralysis rescue, surgical anesthesia, airway opening and the like.

The tracheal cannula is suitable for patients needing artificial airway management, and can provide good conditions for treating sudden respiratory arrest, airway obstruction, hypoxia or insufficient ventilation and the like. At present, when a tracheal intubation operation is carried out in a department of respiration, an intubation tube and a tooth pad are generally required to be fixed, and then the intubation tube and the tooth pad are fixed together through an adhesive tape, so that the deviation of a catheter is prevented; the fixed position of the catheter does not facilitate the adjustment of the insertion depth as required.

Based on the above, the invention designs an integrated fixing device for trachea cannula for department of respiration, so as to solve the above problems.

Disclosure of Invention

The invention aims to provide an integrated fixing device for trachea cannula for department of respiration, which solves the problems that the existing fixing and placing operation in the background technology is troublesome, the fixing procedure is complicated and very inconvenient, and due to the secretion of facial skin grease, the stickiness of adhesive plaster is easy to weaken or lose, so that the connection is not firm, the catheter is easy to loosen and misplace, the trachea airflow is not smooth, and the patient's state change is greatly influenced; the insertion depth of the catheter is not convenient to adjust according to the requirement after the position of the catheter is fixed.

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

a trachea cannula integrated fixing device for a respiratory department comprises two groups of oral cavity base plates, wherein rear tooth pads are fixedly connected at two ends of each oral cavity base plate, a fixed side plate is fixedly connected at the inner end of each oral cavity base plate, a fixed base tube is slidably connected in the middle of the fixed side plate, a positioning shifting block is slidably connected in the middle of the fixed side plate, positioning tooth plates are fixedly connected on two side walls of the fixed base tube, the positioning shifting blocks are matched with the positioning tooth plates, movable tooth pads are fixedly connected on the upper side wall and the lower side wall of the fixed base tube, a movable inner tube is connected in the fixed base tube in a ball joint mode, a clamping pipe fitting is fixedly arranged at the end part of the movable inner tube and used for fixing a trachea cannula, a positioning bolt is connected to the top of the fixed base tube in a threaded mode and used for fixing the movable inner, the side wall of the oral cavity substrate is connected with a bending hanging plate in a sliding mode, the inner wall of the bending hanging plate is fixedly connected with a clinging air bag, and the clinging air bag is matched with the chin of a human body.

Preferably, the oral cavity base plate is the arc, back bite-block is C clip angle pad and is the cushion, the equal fixedly connected with silica gel protection bed of back bite-block upper and lower face.

Preferably, equal fixedly connected with contained angle forked plate in oral cavity base plate inner, fixed curb plate passes through contained angle forked plate fixed connection, fixed curb plate is the arc.

Preferably, the fixed parent tube lateral wall fixedly connected with direction draw runner, the direction spout has been seted up to fixed curb plate inner wall, the direction draw runner is located direction spout and sliding fit with it, the groove of stepping down has been seted up to fixed curb plate inner wall.

Preferably, the unblock sliding window has been seted up in the middle of the groove of stepping down, the outer plectrum of location shifting block lateral wall fixedly connected with, and stretch out unblock sliding window and sliding fit with it, the location shifting block is the arc piece of a plurality of cuttings of bottom fixedly connected with and concentric with fixed parent tube, the cuttings and the tooth clearance fit of location pinion rack, the location pinion rack is located the inslot of stepping down.

Preferably, the downside is the plane on the fixed parent tube, activity bite-block fixed connection is at the plane top, the activity bite-block is the arc pad, and the also fixedly connected with silica gel of both sides protects the bed, the ball groove has been seted up to fixed base tube inner wall, activity inner tube outer wall fixedly connected with connects the ball, it is located ball inslot and its normal running fit to connect the ball.

Preferably, the equal fixedly connected with slip curb plate in both sides about the fixed parent tube, the movable rack is the U-shaped and cooperates with the slip curb plate through both sides fixed connection's T shape slide, fixedly connected with antiskid spring between movable rack and the fixed parent tube, the movable rack under the antiskid spring original state is the state of stretching forward, positioning bolt passes through the meshing of one side of top fixed connection's fluted disc and movable rack.

Preferably, the centre gripping pipe fitting includes a plurality of clamping pieces of fixed connection at the activity inner tube tip, activity inner tube outer wall threaded connection has the taper sleeve, the taper sleeve is used for pressing from both sides clamping piece fixation clamp at the trachea cannula outer wall fixed.

Preferably, the rear end of the fixed base tube is fixedly connected with a tightening sleeve, and the tightening sleeve is an elastic silica gel sleeve.

Preferably, oral cavity base plate lateral wall fixedly connected with slip sleeve, buckle link plate one end and be located the slip sleeve and the inside extension spring fixed connection that passes through of the two, the link plate stretches out the board in the fixedly connected with of buckle link plate bottom, paste tight gasbag fixed connection and stretch out the board top in, it is the arc to stretch out the board in.

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

the trachea cannula can be fixed in the trachea cannula by downwards rotating the conical sleeve, so that the trachea cannula is simple, quick, stable and adjustable in depth; the oral cavity base plate is placed in the oral cavity, and the position of the fixed base tube is adjusted, so that the rear bite block and the movable bite block are simultaneously suitable for the position and the shape of the teeth of a patient, discomfort is relieved, the whole device is well stressed, and fixation is stable; the movable inner tube is adjusted, so that the tracheal cannula can have a certain adjustment range, and the tracheal cannula is convenient to connect with the airway of a patient; the movable inner tube is loosened or fixed by moving the movable rack back and forth, the operation mode is changed, the operation time can be reduced relative to the rotation, and meanwhile, the protection is provided, the return is prevented, and the stability is high; through the cooperation of the bent hanging plate, the inward extending plate and the tight air bag, the device can be fixed on the chin, so that the adhesive tape adhesion and the like are avoided, the workload of medical workers is reduced, the discomfort of a patient is relieved, the fixation is stable, and the influence of facial grease or saliva and the like is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic side view structure of the present invention;

FIG. 2 is a schematic rear view structure of the present invention;

FIG. 3 is a schematic top view of the present invention;

FIG. 4 is a side view of the semi-sectional structure of the present invention;

FIG. 5 is a schematic view of a top-view step-cut structure of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-oral cavity base plate, 2-back tooth cushion, 3-fixed side plate, 4-fixed base tube, 5-positioning shifting block, 6-positioning toothed plate, 7-movable tooth cushion, 8-movable inner tube, 9-tracheal cannula-, 10-positioning bolt, 11-movable rack, 12-bending hanging plate, 13-attaching air bag, 14-silica gel guard bed, 15-included angle fork plate, 16-guiding slide bar, 17-abdicating groove, 18-unlocking slide window, 19-outer shifting piece, 20-connecting ball, 21-sliding side plate, 22-anti-sliding spring, 23-toothed disc, 24-clamping piece, 25-conical sleeve, 26-tightening sleeve, 27-sliding sleeve and 28-inner extension plate.

Detailed Description

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

Referring to fig. 1-5, the present invention provides a technical solution:

an integral fixing device for a trachea cannula for a respiratory department comprises two groups of oral cavity base plates 1, wherein both ends of each oral cavity base plate 1 are fixedly connected with a rear tooth pad 2, the inner ends of the oral cavity base plates 1 are fixedly connected with a fixed side plate 3, the middle of the fixed side plate 3 is slidably connected with a fixed base tube 4, the middle of the fixed side plate 3 is slidably connected with a positioning shifting block 5, both side walls of the fixed base tube 4 are fixedly connected with positioning tooth plates 6, the positioning shifting block 5 is matched with the positioning tooth plates 6, the upper and lower side walls of the fixed base tube 4 are fixedly connected with movable tooth pads 7, a movable inner tube 8 is connected in the fixed base tube 4 in a ball joint manner, the end part of the movable inner tube 8 is fixedly provided with a clamping pipe fitting, the clamping pipe fitting is used for fixing the trachea cannula 9, the top of the fixed base tube 4 is in threaded connection with a positioning bolt, the side wall of the oral cavity substrate 1 is connected with a bending hanging plate 12 in a sliding way, the inner wall of the bending hanging plate 12 is fixedly connected with a clinging air bag 13, and the clinging air bag 13 is matched with the chin of a human body.

The oral cavity base plate 1 is an arc-shaped plate and is adapted to the internal structure of the oral cavity of a human body, so that the back bite block 2 can be matched with the back teeth; the back bite block 2 is a C-shaped corner-clamping cushion and is an elastic cushion, and the upper surface and the lower surface of the back bite block 2 are fixedly connected with silica gel protection beds 14. The upper side and the lower side of the fixed base tube 4 are planes, the movable bite block 7 is fixedly connected to the top of the plane, the movable bite block 7 is an arc-shaped block, the two sides of the movable bite block are also fixedly connected with the silica gel guard 14, teeth are clamped by the silica gel guard 14, the displacement of the oral cavity base plate 1 is avoided, a stable state is ensured, the rear bite block 2 with an elastic opening angle can support the oral cavity of a patient to a certain degree, the front end is prevented from being closed to bite the tracheal cannula 9, and meanwhile, the stress of the oral cavity of the patient is relieved; the ball groove has been seted up to 4 inner walls of fixed parent tubes, and 8 outer walls fixedly connected with of activity inner tube connect ball 20, connect ball 20 to be located ball inslot and with it normal running fit, the ball joint mode makes activity inner tube 8 and trachea cannula 9 of being connected with it can obtain certain regulation space to adapt to different patient's demands, improve the flexibility, facilitate the use.

Wherein, 1 inner equal fixedly connected with contained angle forked plate 15 of oral cavity base plate, fixed curb plate 3 passes through contained angle forked plate 15 fixed connection, and fixed curb plate 3 is the arc, is equipped with the space between contained angle forked plate 15 and the fixed curb plate 3, and the pipe is inhaled or the pipe of giving medicine to poor free of interference to other nursing or rescue work goes on in convenient putting into through the clearance of its both sides in trachea cannula 9 work simultaneously. The side wall of the fixed base tube 4 is fixedly connected with a guide sliding strip 16, the inner wall of the fixed side plate 3 is provided with a guide sliding groove, and the guide sliding strip 16 is positioned in the guide sliding groove and is in sliding fit with the guide sliding groove, so that the fixed base tube 4 and the fixed side plate 3 can only move forwards and backwards while being stably connected; the inner wall of the fixed side plate 3 is provided with a yielding groove 17, and the positioning toothed plate 6 gives way to a space, so that the movement is convenient. The middle of the abdicating groove 17 is provided with an unlocking sliding window 18, the side wall of the positioning shifting block 5 is fixedly connected with an outer shifting piece 19, the outer shifting piece extends out of the unlocking sliding window 18 to be in sliding fit with the positioning shifting block, the positioning shifting block 5 is an arc-shaped block of a plurality of inserting strips fixedly connected with the bottom and is concentric with the fixed base tube 4, the inserting strips are in clearance fit with the teeth of the positioning toothed plate 6, the inserting strips can be separated from the positioning toothed plate 6 by shifting the outer shifting piece 19, unlocking can be achieved, and the fixed base tube 4 can be adjusted.

The upper side and the lower side of the fixed base tube 4 are both fixedly connected with sliding side plates 21, the movable rack 11 is U-shaped and is matched with the sliding side plates 21 through T-shaped sliding plates fixedly connected with the two sides, and the sliding is stable and cannot be separated; fixedly connected with antiskid spring 22 between movable rack 11 and the fixed parent tube 4, movable rack 11 under the antiskid spring 22 original state is the state of stretching forward, through antiskid spring 22's restriction, under positioning bolt 10 clamping condition, make movable rack 11 not retreat easily, guarantee positioning bolt 10's stability, thereby make activity inner tube 8 fixed stable, avoid unexpected not hard up etc. positioning bolt 10 meshes through top fixed connection's fluted disc 23 and one side of movable rack 11.

Wherein, the centre gripping pipe fitting includes a plurality of tight pieces 24 of clamp of fixed connection 8 tip in the activity, and 8 outer wall threaded connection in activity inner tube have a taper sleeve 25, and taper sleeve 25 is used for pressing from both sides tight piece 24 fixed clamp at the trachea cannula 9 outer wall of fixing, thereby can tighten up tight piece 24 through rotatory taper sleeve 25 downwards and act on inside trachea cannula 9 with its centre gripping including fixed simple reliable. The rear end fixedly connected with of fixed parent tube 4 tightens up cover 26, and tightens up cover 26 and is the elastic silica gel cover, plays the guide effect simultaneously to middle trachea cannula 9, avoids in the oral cavity liquid gets into fixed parent tube 4.

The side wall of the oral cavity substrate 1 is fixedly connected with a sliding sleeve 27, one end of the bending hanging plate 12 is positioned in the sliding sleeve 27, the two ends are fixedly connected through a tension spring, and the bending hanging plate 12 can always have an inward-folding trend through the tension spring, so that the bending hanging plate is attached to and fixed with the chin of a patient; stretch out board 28 in the 12 bottom fixedly connected with of hanging plate of buckling, paste tight gasbag 13 fixed connection and stretch out 28 tops in, stretch out board 28 in for the arc, adapt to patient chin bottom shape, the tight gasbag 13 of pasting that can inflate the gassing regulation simultaneously can be with oral cavity base plate 1 centre gripping on fixing the chin, improve stability to reduce the use of outside fixed adhesive tape.

One specific application of this embodiment is:

as shown in fig. 5, the trachea cannula 9 is inserted into the movable inner tube 8, then the conical sleeve 25 is rotated downwards to act on the clamping piece 24 so as to enable the clamping piece to be tightly attached to the inner wall of the trachea cannula 9, and therefore the trachea cannula is clamped and fixed in the movable inner tube 8, and the fixed connection between the movable inner tube 8 and the trachea cannula 9 is completed, so that the trachea cannula is simple, rapid and convenient to adjust.

As shown in fig. 1, 4 and 5, according to the invention, the oral cavity base plate 1 is placed in the oral cavity of a patient, meanwhile, the back teeth are positioned in the middle of the back bite block 2, and then the outer shifting piece 19 is shifted downwards to drive the positioning shifting block 5 to rotate downwards, so that the cutting slips are separated from the positioning toothed plate 6, at the moment, the fixed base tube 4 can move back and forth relative to the fixed side plate 3, thereby changing the position of the movable bite block 7, adapting to the tooth radians of different patients, enabling the upper teeth and the lower teeth of the patient to be matched with the movable bite block 7, thereby relieving the discomfort of the patient, enabling the fixed base tube 4 and the oral cavity base plate 1 to be well assisted by the patient's teethridge; after the adjustment, the outer shifting piece 19 is shifted upwards, so that the positioning shifting block 5 is matched with the positioning toothed plate 6 again, the fixed base pipe 4 cannot move, and the fixing adjustment is simple, fast and convenient.

As shown in fig. 3 and 4, by rotating the movable inner tube 8, because the connecting ball 20 is in ball joint with the fixed base tube 4, the movable inner tube 8 has a larger degree of freedom, and can have a certain adjusting space up and down, left and right, thereby changing the position of the tracheal cannula 9 therein, enabling the patient to be more flexibly adapted to, thereby obtaining a better ventilation effect, facilitating the placement of a pipeline and establishing an airway; after adjustment is completed, the movable rack 11 is pushed forwards to drive the fluted disc 23 meshed with the movable rack to rotate, so that the positioning bolt 10 moves downwards to clamp and fix the connecting ball 20, the connecting ball cannot rotate, the positions of the movable inner tube 8 and the air tube insertion tube 9 are fixed, and the movable rack 11 cannot easily move backwards under the action of the anti-slip spring 22, so that the positioning bolt 10 cannot be reversely rotated and loosened, the fixation stability is ensured, accidental loosening is avoided, and the fixing is reliable.

As shown in fig. 1, 2 and 4, the bending hanging plate 12 is pulled out from the sliding sleeve 27 and is tightly attached to the chin of the patient under the action of the tension spring therein, and the inward extending plate 28 and the tight attaching air bag 13 are positioned below the chin and are inflated inwards to be expanded so as to be tightly attached to the bottom of the chin, positioned at the position of the mandible and positioned at the concave part of the bottom of the chin, so that the fixing is stable and cannot be easily shifted, the air bag is clamped and fixed, no obvious oppression feeling exists, the wearing effect is good, and the hanging plate is suitable for the chin of various patients; after the facial mask is fixed and worn, other adhesive tape bandages are not needed to be fixed again, so that the compression or adhesion of the adhesive tapes of the facial bandage is reduced, the workload of medical workers is reduced, the discomfort of a patient is relieved, the facial mask is fixed stably and is not affected by facial grease or saliva and the like.

As shown in figures 1 and 3, other pipelines can be simultaneously placed in the included angle fork plate 15, so that other nursing and treatment operations can be carried out on a patient, and the use is more convenient and flexible. A certain guidance against displacement is provided by the tightening sleeve 26 at the rear end, while oral liquid cannot enter the interior of the fixed base pipe 4.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a trachea cannula integral type fixing device for department of respiration which characterized in that: the novel oral cavity base plate comprises two groups of oral cavity base plates (1), rear tooth pads (2) are fixedly connected to the two ends of each oral cavity base plate (1), fixed side plates (3) are fixedly connected to the inner ends of the oral cavity base plates (1), fixed base tubes (4) are slidably connected to the middles of the fixed side plates (3), positioning shifting blocks (5) are slidably connected to the middles of the fixed side plates (3), positioning toothed plates (6) are fixedly connected to the two side walls of each fixed base tube (4), the positioning shifting blocks (5) are matched with the positioning toothed plates (6), movable tooth pads (7) are fixedly connected to the upper side wall and the lower side wall of each fixed base tube (4), movable inner tubes (8) are connected to the inner ball joints of the fixed base tubes (4), clamping pipe fittings are fixedly arranged at the end parts of the movable inner tubes (8), the clamping pipe fittings are used for fixing, positioning bolt (10) are used for fixed activity inner tube (8), fixed parent tube (4) top sliding connection has movable rack (11), movable rack (11) and positioning bolt (10) cooperation, oral cavity base plate (1) lateral wall sliding connection has the link plate of buckling (12), link plate of buckling (12) inner wall fixedly connected with pastes tight gasbag (13), paste tight gasbag (13) and human chin cooperation.

2. The endotracheal intubation integrated fixation device according to claim 1, wherein: the oral cavity base plate (1) is the arc, back bite-block (2) are C clamp angle pad and are the cushion, equal fixedly connected with silica gel protects bed (14) about back bite-block (2).

3. The endotracheal intubation integrated fixation device according to claim 1, wherein: the oral cavity base plate (1) inner equal fixedly connected with contained angle forked plate (15), fixed curb plate (3) are through contained angle forked plate (15) fixed connection, fixed curb plate (3) are the arc.

4. The endotracheal intubation integrated fixation device according to claim 1, wherein: fixed parent tube (4) lateral wall fixedly connected with direction draw runner (16), the direction spout has been seted up to fixed curb plate (3) inner wall, direction draw runner (16) are located the direction spout with it sliding fit, fixed curb plate (3) inner wall has been seted up and has been stepped down groove (17).

5. The endotracheal intubation integrated fixation device according to claim 4, wherein: offer unblock sliding window (18) in the middle of the groove of stepping down (17), location shifting block (5) lateral wall fixedly connected with outer plectrum (19), and stretch out unblock sliding window (18) sliding fit with it, location shifting block (5) are the arc piece of a plurality of cuttings of bottom fixedly connected with and with fixed parent tube (4) concentric, the tooth clearance fit of cuttings and location pinion rack (6), location pinion rack (6) are located the groove of stepping down (17).

6. The endotracheal intubation integrated fixation device according to claim 1, wherein: the side is the plane about fixed parent tube (4), activity bite-block (7) fixed connection is at the plane top, activity bite-block (7) are the arc pad, and both sides also fixedly connected with silica gel protects bed (14), the ball groove has been seted up to fixed parent tube (4) inner wall, activity inner tube (8) outer wall fixedly connected with connects ball (20), connect ball (20) and be located the ball inslot and normal running fit with it.

7. The endotracheal intubation integrated fixation device according to claim 1, wherein: the equal fixedly connected with of both sides slides curb plate (21) about fixed parent tube (4), movable rack (11) are the U-shaped and through both sides fixed connection's T shape slide and the cooperation of slip curb plate (21), fixedly connected with antiskid spring (22) between movable rack (11) and fixed parent tube (4), movable rack (11) under antiskid spring (22) original state is the state of stretching forward, positioning bolt (10) mesh through one side of top fixed connection's fluted disc (23) and movable rack (11).

8. The endotracheal intubation integrated fixation device according to claim 1, wherein: the clamping pipe fitting comprises a plurality of clamping pieces (24) fixedly connected to the end portion of the movable inner pipe (8), the outer wall of the movable inner pipe (8) is in threaded connection with a conical sleeve (25), and the conical sleeve (25) is used for fixedly clamping the clamping pieces (24) on the outer wall of the fixed trachea cannula (9).

9. The endotracheal intubation integrated fixation device according to claim 1, wherein: the rear end of the fixed base pipe (4) is fixedly connected with a tightening sleeve (26), and the tightening sleeve (26) is an elastic silica gel sleeve.

10. The endotracheal intubation integrated fixation device according to claim 1, wherein: oral cavity base plate (1) lateral wall fixedly connected with sliding sleeve (27), link plate (12) one end of buckling is located sliding sleeve (27) and the two inside through extension spring fixed connection, stretch board (28) in link plate (12) bottom fixedly connected with of buckling, paste tight gasbag (13) fixed connection and stretch board (28) top in, stretch board (28) are the arc.