CN111657964A

CN111657964A - Arm auxiliary device that draws blood

Info

Publication number: CN111657964A
Application number: CN202010565830.4A
Authority: CN
Inventors: 钟鑫伟
Original assignee: Dongyang Botong Traditional Chinese Medicine Technology Co ltd
Current assignee: Dongyang Botong Traditional Chinese Medicine Technology Co ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2020-09-15

Abstract

The invention discloses an arm blood drawing auxiliary device, which comprises a shell, wherein a working cavity with a right opening is arranged in the shell, the working cavity is internally provided with a working block, the front end and the rear end of the working block are fixedly connected with the front wall and the rear wall of the working cavity, a thumb cavity with a right opening is arranged in the working block, a thumb push rod is arranged in the thumb cavity in a left-right sliding manner, the invention is used for assisting the blood drawing of the arm, after the arm is inserted into the blood drawing person, the big arm of the hand can be tightly hooped through the hooping ring to block the vein, so that the vein is inflated with congestion and the blood is convenient to draw, after the hand is inserted into the blood taking device, the blood taking device can automatically use the disinfection cotton ball to disinfect back and forth in the blood taking area, does not need the medical staff to perform redundant operation, only needs the medical staff to take blood, and is time-saving and labor-saving.

Description

Arm auxiliary device that draws blood

Technical Field

The invention relates to the field related to medical robots, in particular to an arm blood drawing auxiliary device.

Background

At present, blood detection in physical examination is an important item, when medical staff draw blood for an examinee, the large arm of the examinee needs to be firstly clamped by a rubber tube, then a blood drawing area is disinfected, and then blood drawing operation can be carried out.

Disclosure of Invention

In order to solve the problems, the arm blood drawing auxiliary device comprises a shell, a working cavity with a rightward opening is arranged in the shell, a working block is arranged in the working cavity, the front end and the rear end of the working block are fixedly connected to the front wall and the rear wall of the working cavity, a thumb cavity with a rightward opening is arranged in the working block, a thumb push rod is arranged in the thumb cavity in a left-right sliding mode, a thumb spring is fixedly connected between the left end of the thumb push rod and the left wall of the thumb cavity, a four-finger cavity with a leftward opening is arranged above the thumb cavity, a limiting hole with an upward opening is arranged on the lower wall of the four-finger cavity, the cross section of the limiting hole is square, the lower wall of the limiting hole is communicated with the thumb cavity, a four-finger push rod is arranged in the four-finger cavity in a left-right sliding mode, a four-finger spring is fixedly connected between the right end of the four-finger, the rear side of the four-finger push rod is engaged with a four-finger rotating wheel, the lower end of the four-finger rotating wheel is fixedly provided with a limiting block, the upper half part of the limiting block is a cube, the lower half part of the limiting block is a cylinder, the side length of the cube of the upper half part of the limiting block is equal to the diameter of the cylinder of the lower half part of the limiting block, the limiting block extends downwards into the limiting hole, the cross section of the upper half part of the limiting block is matched with the cross section of the limiting hole, when the limiting block completely extends into the limiting hole, the limiting block cannot rotate, the four-finger rotating wheel cannot rotate, the four-finger push rod cannot move, the lower end of the limiting block is fixedly provided with a top block, the top block extends downwards into the thumb cavity, a driving cavity with a rightward opening is arranged above the four-finger cavity, the upper end of the four-finger rotating, the left end of the cam is rotatably connected with an auxiliary wheel, the left wall of the driving cavity is fixedly provided with a main motor, the right end of the main motor is in power connection with a driving shaft, the driving shaft is fixedly provided with a driving wheel, the right end of the driving shaft is connected with a roller through a bearing, the left end of the roller is connected with tapered teeth in a winding manner, the cylindrical surface of the roller is provided with a slide rail in an end-to-end surrounding manner, the slide rail is provided with a slide block in a sliding manner, the lower end of the slide block slides left and right on the lower wall of the driving cavity, the upper wall of the working cavity is fixedly provided with a hanging block, the lower end of the hanging block is hinged with a guide plate, a slide groove with a downward opening and a leftward opening is arranged in the guide plate, a transverse plate is arranged in the slide groove in a sliding manner, a spring is fixedly connected between, the hand is extended into the transverse plate from the lower part of the transverse plate, so that the roller rolls upwards along the arm until the roller rolls to the position near a blood drawing area, the hand is extended into the working cavity continuously until the palm is positioned below the working block, at the moment, the thumb push rod is pushed leftwards by the thumb and pushed into the thumb cavity until the thumb push rod contacts with the top block and jacks up the top block, the upper half part of the limiting block is driven to be upwards separated from the limiting hole, the lower semi-cylindrical part of the limiting block can rotate in the limiting hole, the four-finger rotating wheel can also rotate, at the moment, the four-finger push rod is pushed rightwards by the four fingers, the four-finger push rod is pushed into the four-finger cavity, the four-finger rotating wheel is driven to rotate, the cam is driven to rotate through the rotating shaft, and the auxiliary wheel rotates to the right side by taking the rotating shaft as a rotating center, until the auxiliary wheel is meshed with the driving wheel and the roller, the main motor is started, and then the driving wheel is driven to rotate by the driving shaft, thereby driving the auxiliary wheel to rotate, further the roller to rotate, further the slide block along the slide rail, the transverse plate slides left and right at the bottom of the driving cavity, the left end of the transverse plate is driven by the sliding block, the transverse plate slides left and right along the sliding groove, thereby enabling the clamping jaws to slide on the blood drawing area on the arm in a reciprocating manner, then loosening the four-finger push rod, enabling the four-finger push rod to slide leftwards under the force of the four-finger spring, thereby driving the four-finger rotating wheel to rotate reversely and further driving the cam to rotate reversely, the auxiliary wheel is separated from the driving wheel and the roller, and then the roller no longer rotates, the slider no longer slides, and then the jack catch no longer reciprocates and slides.

Preferably, the right end of the guide plate is hinged with a guide rod, the right end of the guide rod is hinged with a discharge rod, a storage cavity with a left opening and a right opening is arranged in the upper wall of the working cavity, the storage cavity is internally provided with a sterilized cotton ball, the discharge rod slides leftwards and rightwards in the storage cavity, the right end of the discharge rod is provided with a through hole which is communicated from top to bottom, when no arm extends, the right end of the transverse plate is lowered, the guide plate rotates clockwise and pulls the guide rod leftwards, the discharge rod is pulled leftwards, so that the through hole is positioned in the storage cavity, and then the sterilized cotton ball in the storage cavity falls into the through hole, when the arm extends, the right end of the transverse plate upwarps, so that the guide plate rotates anticlockwise and pushes the guide rod rightwards, the guide rod pushes the discharge rod rightwards, and then, the through-hole area the aseptic cotton ball is released to the right outside the storage cavity, at this moment in the through-hole the aseptic cotton ball falls into downwards on the slide, and along the slide rolls into downwards the jack catch, and then under the drive of jack catch, disinfect in the regional friction that reciprocates of drawing blood of arm, can draw blood operation afterwards.

Preferably, a clamping ring is fixedly arranged at the right end of the shell, the clamping ring is annular and hollow, rubber cloth is fixedly arranged on the inner ring of the clamping ring, the rubber cloth wraps the inner ring of the clamping ring to form a closed air cavity in the clamping ring, an auxiliary motor is arranged at the left end of the shell, an air passage is communicated between the auxiliary motor and the air cavity, a limiting cavity is arranged at the right end of the auxiliary motor and is communicated with the air passage, a one-way valve is arranged in the limiting cavity in a sliding mode from left to right, air can only pass through the one-way valve from left to right, an air outlet is communicated with the lower part of the limiting cavity, a pressure relief valve is arranged at the right side of the limiting cavity and is communicated with the air passage and the working cavity, air can only pass through the pressure relief valve from bottom to top under constant pressure, and when a hand passes through the clamping ring and extends into the working cavity, at the moment, the arm of the hand is positioned at the position of the clamping ring, the thumb pushes the thumb push rod into the thumb cavity, the auxiliary motor is started to blow air into the air passage, the air pushes the one-way valve right until pushing against the right wall of the limiting cavity when passing through the limiting cavity, the air outlet is blocked by the one-way valve at the moment, then the air continues to go right through the one-way valve and enters the air cavity along the air passage, the air pressure in the air cavity is increased to prop the rubber cloth open until the arm is clamped, so that the blood vessel on the arm is convenient to bulge, when the air pressure in the air cavity reaches a certain value, the pressure release valve can pass through the air to maintain the air pressure in the air cavity constant, when the arm finishes blood drawing, the thumb releases the thumb push rod, the thumb push rod is pushed out by the force of the thumb spring, and at the moment, the auxiliary motor is closed, and then the pressure on the left side of the one-way valve is smaller than that on the right side, so that the one-way valve is pushed leftwards, the air outlet is not blocked any more at this moment, the air in the air cavity is discharged from the air outlet along the air passage, the air pressure of the air cavity is reduced, the rubber cloth rebounds, the arm is not hooped any more, and the arm can be drawn out at this moment.

The invention has the beneficial effects that: the invention is used for assisting the blood drawing of the arm, after the arm is stretched into by a person to be drawn, the arm can be tightly hooped by the hooping ring to block the vein, so that the vein is engorged with congestion, and the blood drawing is convenient.

Drawings

For ease of illustration, the invention is described in detail by the following specific examples and figures.

FIG. 1 is a schematic view of an arm blood drawing assisting device according to the present invention;

FIG. 2 is a schematic structural view of portion "A" of FIG. 1;

FIG. 3 is a schematic view of the structure in the direction "B-B" of FIG. 2;

FIG. 4 is a schematic view of the structure in the direction "C-C" of FIG. 2;

FIG. 5 is a schematic view of the working state of FIG. 1;

FIG. 6 is a schematic view of the structure in the direction "D-D" of FIG. 5;

fig. 7 is a schematic view of the structure in the direction "E" of fig. 5.

Detailed Description

The invention will now be described in detail with reference to fig. 1-7, for ease of description, the orientations described below will now be defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The invention relates to an arm blood drawing auxiliary device, which comprises a shell 11, wherein a working cavity 12 with a right opening is arranged in the shell 11, a working block 23 is arranged in the working cavity 12, the front end and the rear end of the working block 23 are fixedly connected with the front wall and the rear wall of the working cavity 12, a thumb cavity 14 with a right opening is arranged in the working block 23, a thumb push rod 13 is arranged in the thumb cavity 14 in a left-right sliding mode, a thumb spring 15 is fixedly connected between the left end of the thumb push rod 13 and the left wall of the thumb cavity 14, a four-finger cavity 27 with a left opening is arranged above the thumb cavity 14, a limiting hole 24 with an upward opening is arranged on the lower wall of the four-finger cavity 27, the section of the limiting hole 24 is square, the lower wall of the limiting hole 24 is communicated with the thumb cavity 14, a four-finger push rod 25 is arranged in the four-finger cavity 27 in a left-right sliding mode, a four-finger spring 56 is fixedly, the rear side of the four-finger push rod 25 is engaged with a four-finger rotating wheel 26, the lower end of the four-finger rotating wheel 26 is fixedly provided with a limiting block 22, the upper half part of the limiting block 22 is a cube, the lower half part of the limiting block 22 is a cylinder, the side length of the cube of the upper half part of the limiting block 22 is equal to the diameter of the cylinder of the lower half part of the limiting block, the limiting block 22 extends downwards into the limiting hole 24, the cross section of the limiting hole 24 is matched with the upper half part of the limiting block 22, when the limiting block 22 completely extends into the limiting hole 24, the limiting block 22 cannot rotate, the four-finger rotating wheel 26 cannot rotate, the four-finger push rod 25 cannot move, the lower end of the limiting block 22 is fixedly provided with a top block 20, the top block 20 extends downwards into the thumb cavity 14, a driving cavity 34 with a right opening is arranged above the four-finger cavity 27, the upper end of the four-finger rotating wheel 26, the upper end of the rotating shaft 28 is fixedly connected with a cam 29, the left end of the cam 29 is rotatably connected with an auxiliary wheel 31, the left wall of the driving cavity 34 is fixedly provided with a main motor 30, the right end of the main motor 30 is in power connection with a driving shaft 32, the driving shaft 32 is fixedly provided with a driving wheel 33, the right end of the driving shaft 32 is connected with a roller 35 through a bearing, the left end of the roller 35 is provided with conical teeth in a winding manner, the cylindrical surface of the roller 35 is provided with a slide rail 36 in an end-to-end surrounding manner, the slide rail 36 is provided with a slide block 37 in a sliding manner, the lower end of the slide block 37 slides on the lower wall of the driving cavity 34 in a left-to-right manner, the upper wall of the working cavity 12 is fixedly provided with a hanging block 41, the lower end of the hanging block 41 is hinged with a guide plate 40, a slide groove, a claw 51 is fixedly arranged at the right end of the transverse plate 39, a roller 50 is hinged at the left side of the claw 51, a slideway 49 is arranged at the upper side of the transverse plate 39, when a person to be subjected to blood drawing needs to draw blood, a hand is extended into the transverse plate 39 from the lower side, the roller 50 rolls upwards along the arm until the roller 50 rolls to the vicinity of a blood drawing area, the hand is extended into the working cavity 12 continuously until the palm is positioned below the working block 23, the thumb push rod 13 is pushed leftwards by the thumb at the moment, the thumb push rod 13 is pushed into the thumb cavity 14 until the thumb push rod 13 contacts the top block 20 and jacks up the top block, the upper half part of the limit block 22 is further driven to be upwards separated from the limit hole 24, the lower half-cylinder part of the limit block 22 can rotate in the limit hole 24, the four-finger rotating wheel 26 can also rotate, the four-finger push rod 25 rightwards by the four-finger, the four-finger push rod 25 is pushed into the four-finger cavity 27 to drive the four-finger rotating wheel 26 to rotate, the cam 29 is driven to rotate by the rotating shaft 28, the auxiliary wheel 31 rotates to the right side by taking the rotating shaft 28 as a rotating center until the auxiliary wheel 31 is meshed with the driving wheel 33 and the roller 35, the main motor 30 is started, the driving wheel 33 is driven to rotate by the driving shaft 32 to drive the auxiliary wheel 31 to rotate, the roller 35 rotates, the sliding block 37 slides left and right along the sliding rail 36 at the bottom of the driving cavity 34, the left end of the transverse plate 39 is driven by the sliding block 37, the transverse plate 39 slides left and right along the sliding groove 43, the clamping jaw 51 slides back and forth in a blood sucking area on the arm, then the four-finger push rod 25 is released, and the four-finger push rod 25 slides left under the force of the four-finger spring 56, and then the four-finger rotating wheel 26 is driven to rotate reversely, and further the cam 29 is driven to rotate reversely, the auxiliary wheel 31 is separated from the driving wheel 33 and the roller 35, further the roller 35 does not rotate any more, the sliding block 37 does not slide any more, and further the claw 51 does not slide to and fro.

Beneficially, the right end of the guide plate 40 is hinged with a guide rod 42, the right end of the guide rod 42 is hinged with a discharge rod 44, a storage cavity 45 with a left opening and a right opening is arranged in the upper wall of the working cavity 12, a sterilized cotton ball 48 is arranged in the storage cavity 45, the discharge rod 44 slides left and right in the storage cavity 45, the right end of the discharge rod 44 is provided with a through hole 46 which is communicated up and down, when no arm extends, the right end of the transverse plate 39 is lowered, the guide plate 40 rotates clockwise and pulls the guide rod 42 leftwards, the guide rod 42 pulls the discharge rod 44 leftwards, so that the through hole 46 is positioned in the storage cavity 45, and then the sterilized cotton ball 48 in the storage cavity 45 falls into the through hole 46, when the arm extends, the right end of the transverse plate 39 upwarps, so that the guide plate 40 rotates anticlockwise and pushes the guide rod 42 rightwards, the guide rod 42 pushes the, and then the right end of the discharging rod 44 is pushed out of the material storage cavity 45, the through hole 46 drives the sterilized cotton ball 48 to be pushed out of the material storage cavity 45 rightwards, at the moment, the sterilized cotton ball 48 in the through hole 46 falls down onto the slide way 49 and rolls into the clamping jaw 51 downwards along the slide way 49, and then under the driving of the clamping jaw 51, the blood drawing area of the arm is rubbed back and forth to be sterilized, and then the blood drawing operation can be carried out.

Beneficially, a clamping ring 54 is fixedly arranged at the right end of the housing 11, the clamping ring 54 is annular and hollow, a rubber cloth 53 is fixedly arranged on an inner ring of the clamping ring 54, the rubber cloth 53 wraps the inner ring of the clamping ring 54, so that a closed air cavity 52 is formed in the clamping ring 54, an auxiliary motor 21 is arranged in the left end of the housing 11, an air passage 55 is arranged between the auxiliary motor 21 and the air cavity 52 in a communicating manner, a limiting cavity 19 is arranged at the right end of the auxiliary motor 21, the limiting cavity 19 is communicated with the air passage 55, a check valve 17 is arranged in the limiting cavity 19 in a sliding manner from left to right, air can only pass through the check valve 17 from left to right, an air outlet 18 is arranged in a communicating manner below the limiting cavity 19, a pressure release valve 16 is arranged on the right side of the limiting cavity 19, the pressure release valve 16 is communicated with the air passage 55 and the working cavity 12, air can only pass through the pressure release valve 16, when a hand passes through the tightening ring 54 and extends into the working cavity 12, the arm of the hand is located at the tightening ring 54, the thumb pushes the thumb push rod 13 into the thumb cavity 14, the secondary motor 21 is started to blow air into the air passage 55, when the air passes through the limiting cavity 19, the one-way valve 17 is pushed rightwards until the air is pushed against the right wall of the limiting cavity 19, the air outlet 18 is blocked by the one-way valve 17, then the air passes through the one-way valve 17 and continues to go rightwards, enters the air cavity 52 along the air passage 55, the air pressure in the air cavity 52 is increased, the rubber cloth 53 is expanded until the arm is tightened, so that the blood vessel on the arm is bulged, when the air pressure in the air cavity 52 reaches a certain value, the pressure release valve 16 can pass through the air to maintain the air pressure in the air cavity 52 constant, when the arm finishes blood drawing, the thumb releases the thumb push rod 13, the thumb push rod 13 is pushed out under the force of the thumb spring 15, the auxiliary motor 21 is closed at the moment, the pressure on the left side of the one-way valve 17 is smaller than that on the right side, the one-way valve 17 is pushed leftwards, the air outlet 18 is not blocked at the moment, the air in the air cavity 52 is discharged from the air outlet 18 along the air channel 55, the air pressure of the air cavity 52 is reduced, the rubber cloth 53 rebounds, the arm is not hooped any more, and the arm can be pulled out at the moment.

The following describes in detail the use steps of an arm blood drawing assisting device in this document with reference to fig. 1 to 7: in the initial state, the arm does not pass through the tightening ring 54 and extends into the working chamber 12, the sub-motor 21 is not started, and the main motor 30 is not started.

When blood is to be drawn, a hand penetrates through the clamping ring 54 and extends into the working chamber 12, the right end of the transverse plate 39 is lifted upwards by the arm, the guide plate 40 rotates anticlockwise, the guide rod 42 is pushed rightwards, the guide rod 42 pushes the discharging rod 44 rightwards, the right end of the discharging rod 44 is pushed out of the storage chamber 45, the sterilized cotton balls 48 in the through hole 46 are pushed rightwards out of the storage chamber 45 by the through hole 46, the sterilized cotton balls 48 in the through hole 46 fall downwards onto the slide rail 49 and roll downwards into the clamping jaws 51 along the slide rail 49, the arm is positioned at the clamping ring 54, the thumb pushes the thumb push rod 13 into the thumb cavity 14 by the thumb, the auxiliary motor 21 is started to blow air into the air channel 55, the one-way valve 17 is pushed rightwards until the air is pushed against the right wall of the limiting cavity 19 when the air passes through the limiting cavity 19, the air outlet 18 is blocked by the one-way valve 17, and then the air continues to the right and enters, the air pressure in the air cavity 52 is increased to expand the rubber cloth 53 until the arm is tightened, so that the blood vessel on the arm is protruded, when the air pressure in the air cavity 52 reaches a certain value, the pressure release valve 16 can maintain the air pressure in the air cavity 52 constant by air, then the four-finger push rod 25 is pushed rightwards by the four-finger direction, the four-finger push rod 25 is pushed into the four-finger cavity 27, the four-finger rotating wheel 26 is driven to rotate, the cam 29 is driven to rotate by the rotating shaft 28, the auxiliary wheel 31 rotates rightwards by taking the rotating shaft 28 as a rotating center until the auxiliary wheel 31 is meshed with the driving wheel 33 and the roller 35, the main motor 30 is started, the driving wheel 33 is driven to rotate by the driving shaft 32, the auxiliary wheel 31 is driven to rotate, the sliding block 37 slides leftwards and rightwards at the bottom of the driving cavity 34 along the sliding rail 36, the left end of the transverse plate 39 is driven by the sliding block 37, and the transverse, then the claw 51 slides back and forth in the blood drawing area of the arm to drive the disinfection cotton ball 48 to rub back and forth in the blood drawing area of the arm for disinfection, then the four-finger push rod 25 is loosened, the four-finger push rod 25 slides leftwards under the force of the four-finger spring 56 to drive the four-finger rotating wheel 26 to rotate reversely, further the cam 29 is driven to rotate reversely, the auxiliary wheel 31 is separated from the driving wheel 33 and the roller 35, further the roller 35 does not rotate, the sliding block 37 does not slide any more, further the claw 51 does not slide back and forth, and at the moment, the blood drawing operation can be carried out.

After the arm has taken out blood, the thumb releases the thumb push rod 13, the thumb push rod 13 is pushed out by the force of the thumb spring 15, the auxiliary motor 21 is closed at the moment, the pressure on the left side of the one-way valve 17 is smaller than that on the right side, the one-way valve 17 is pushed leftwards, the air outlet 18 is not blocked at the moment, the air in the air cavity 52 is discharged from the air outlet 18 along the air passage 55, the air pressure in the air cavity 52 is reduced, the rubber cloth 53 rebounds, the arm is not hooped any more, and the arm can be taken out at the moment.

In the above manner, a person skilled in the art can make various changes depending on the operation mode within the scope of the present invention.

Claims

1. The utility model provides an arm auxiliary device that draws blood, includes the casing, its characterized in that: a working cavity with a rightward opening is arranged in the shell, a working block is arranged in the working cavity, the front end and the rear end of the working block are fixedly connected to the front wall and the rear wall of the working cavity, a thumb cavity with a rightward opening is arranged in the working block, a thumb push rod is arranged in the thumb cavity in a left-right sliding manner, a thumb spring is fixedly connected between the left end of the thumb push rod and the left wall of the thumb cavity, a four-finger cavity with a leftward opening is arranged above the thumb cavity, a limiting hole with an upward opening is arranged on the lower wall of the four-finger cavity, the lower wall of the limiting hole is communicated with the thumb cavity, a four-finger push rod is arranged in the four-finger cavity in a left-right sliding manner, a four-finger spring is fixedly connected between the right end of the four-finger push rod and the right wall of the four-finger cavity, a four-finger rotating wheel is meshed with, the lower end of the limiting block is fixedly provided with a top block, the top block extends downwards into the thumb cavity, a driving cavity with a right opening is arranged above the four-finger cavity, the upper end of the four-finger rotating wheel is fixedly connected with a rotating shaft, the rotating shaft extends upwards into the driving cavity, the upper end of the rotating shaft is fixedly connected with a cam, the left end of the cam is rotatably connected with an auxiliary wheel, the left wall of the driving cavity is fixedly provided with a main motor, the right end of the main motor is connected with a driving shaft, the driving shaft is fixedly provided with a driving wheel, the right end of the driving shaft is connected with a roller through a bearing, the left end of the roller is provided with conical teeth in a winding manner, the cylindrical surface of the roller is provided with a slide rail in a head-to-tail surrounding manner, the slide rail is provided with a slide block in a sliding manner, the upper wall of the working cavity, the diaphragm lower extreme with link firmly the spring between the work piece right side wall, the diaphragm right-hand member has set firmly the jack catch, the jack catch left side articulates there is the cylinder, the diaphragm upside is equipped with the slide.

2. An arm blood drawing aid as claimed in claim 1, wherein: the right end of the guide plate is hinged with a guide rod, the right end of the guide rod is hinged with a discharge rod, a storage cavity with a left opening and a right opening is arranged in the upper wall of the working cavity, a sterilized cotton ball is arranged in the storage cavity, and the right end of the discharge rod is provided with a through hole which is communicated up and down.

3. An arm blood drawing aid as claimed in claim 1, wherein: the casing right-hand member has set firmly and has hooped the ring, hoop the ring and be annular and cavity, hoop the intra-annular rubber cloth that has set firmly, the rubber cloth wraps up hoop the ring inner circle makes hoop the intra-annular confined air cavity that forms, be equipped with vice motor in the casing left end, vice motor with what be linked together between the air cavity is equipped with the air flue, vice motor right-hand member is equipped with spacing chamber, spacing chamber with the air flue is linked together, spacing intracavity horizontal slip is equipped with the check valve, what spacing chamber below was linked together is equipped with the gas outlet, spacing chamber right side is equipped with the relief valve, the relief valve intercommunication the air flue with the working chamber.