CN219021373U

CN219021373U - Tourniquet capable of automatically tightening

Info

Publication number: CN219021373U
Application number: CN202222400877.2U
Authority: CN
Inventors: 张婷婷
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-09-09
Filing date: 2022-09-09
Publication date: 2023-05-16
Anticipated expiration: 2032-09-09

Abstract

The utility model discloses an automatic tightening tourniquet, which comprises a tightening control box, a pressure sensing device and a tightening device which are arranged in the tightening control box, and a belt body at least one end of which passes through the tightening control box; when the tightening device drives the belt body to tighten the puncture part, the pressure sensing device obtains a tightening pressure value of the puncture part, and after the tightening pressure value reaches a preset pressure value, the tightening device stops tightening; the tightening device comprises a motor, a first roll shaft and a second roll shaft, wherein the first roll shaft and the second roll shaft are driven by the motor and are arranged in parallel, the belt body passes through the first roll shaft and the second roll shaft, the distance between the roll surfaces of the first roll shaft and the second roll shaft is smaller than the thickness of the belt body, and the first roll shaft and the second roll shaft rotate in opposite directions to tighten the belt body; according to the tourniquet capable of automatically tightening, the automatic tightening operation is carried out before puncture, so that the tightening pressure can be obtained in real time, excessive tightening is avoided, and pain of a person to be punctured is prevented from being aggravated.

Description

Tourniquet capable of automatically tightening

Technical Field

The utility model belongs to the field of medical equipment, and particularly relates to an automatic tightening tourniquet.

Background

Tourniquet, also known as tourniquet, is a major tool for intravenous blood collection, intravenous injection, hemostasis, etc. Venous blood flow is temporarily blocked by strapping the site to be punctured. Research shows that compared with a round tourniquet, the flat tourniquet can better relieve pain of patients and improve puncture success rate. Along with improvement of living standard of people, people have excessive eating and lack of exercise to cause more and more obese people, subcutaneous fat is thickened, so that blood vessels are filled slowly during puncture, the blood vessels are not obvious, the difficulty of puncture is increased, the time for puncture is prolonged, and under the condition, a tourniquet with better performance and better comfort is needed.

Disclosure of Invention

The utility model aims to provide an automatic tightening tourniquet, which is used for automatically tightening before puncture, so that tightening pressure can be obtained in real time, excessive tightening is avoided, and pain of a person to be punctured is avoided being aggravated. Meanwhile, after a period of time is specified, the device can be automatically relaxed, and the problem that the local blood flow is blocked for a long time to cause malignant medical accidents is avoided.

The technical scheme of the utility model relates to an automatic tightening tourniquet, which comprises a tightening control box, a pressure sensing device and a tightening device which are arranged in the tightening control box, and a belt body at least one end of which passes through the tightening control box; when the tightening device drives the belt body to tighten the puncture part, the pressure sensing device obtains a tightening pressure value of the puncture part, and after the tightening pressure value reaches a preset pressure value, the tightening device stops tightening;

the tightening device comprises a motor, a first roll shaft and a second roll shaft, wherein the first roll shaft and the second roll shaft are driven by the motor and are arranged in parallel, the belt body passes through the first roll shaft and the second roll shaft, the distance between the roll surfaces of the first roll shaft and the second roll shaft is smaller than the thickness of the belt body, and the first roll shaft and the second roll shaft rotate in opposite directions to tighten the belt body;

the pressure sensing device comprises a pressure sensor and a pressure contact, wherein the pressure contact is arranged on the surface of the tightening control box facing the puncture part and penetrates through the side surface of the tightening control box to be in contact with the pressure sensor.

Preferably, a driving gear is fixed on an output shaft of the motor, a first gear and a second gear are respectively fixed at one end of the first roll shaft and one end of the second roll shaft, and the number of teeth and the modulus of the first gear and the modulus of the second gear are equal; the second gear is externally meshed with the driving gear, and the first gear is externally meshed with the second gear; the outer diameters of the first roll shaft and the second roll shaft are equal, and anti-skid patterns are respectively arranged on the outer surfaces of the first roll shaft and the second roll shaft.

Preferably, the tightening control box is in a cuboid shape and comprises a top surface, a bottom surface, a front side surface, a rear side surface, a left side surface and a right side surface; the front side and the rear side are respectively arranged along the axial direction of an annular structure formed by the belt body during puncture, the bottom surface, the front side, the left side and the right side are integrally formed, the top surface is detachably fixed, and the rear side is clamped with the left side and the right side;

the axial direction of the second roll shaft is parallel to the axial direction of the annular structure formed by the belt body during puncturing; the right side face is provided with a first notch and a second notch, wherein the central lines of the first notch and the second notch are parallel to the second roll shaft and are U-shaped, the first notch is arranged close to the bottom face, and the second notch is arranged above the first notch and faces to the middle position of the first roll shaft and the second roll shaft; one end of the belt body enters the tightening control box from the first notch, passes through the space between the first roll shaft and the second roll shaft, and passes through the second notch;

a third notch of the U-shaped groove which is opposite to and parallel to the first notch is arranged on the left side face, the other end of the belt body penetrates into the tightening control box from the third notch,

the length of the second roll shaft is adapted to the width of the belt body; the bottom of first notch the second notch with the terminal surface position of third notch all suits towards the leading flank with the second roller, first notch with the oral area of second notch all wears out the terminal surface of right flank towards the trailing flank, the oral area of third notch wears out the terminal surface of left flank towards the trailing flank.

Preferably, both ends of the second roll shaft are fixedly connected with second rotating shafts respectively, and the second gears are sleeved and fixed on the second rotating shafts close to the front side surfaces; the two second rotating shafts are respectively sleeved with a second mounting block, and the two second mounting blocks are fixedly connected with the right side face;

the two ends of the first roll shaft are respectively fixedly connected with a first rotating shaft, the first gears are sleeved and fixed on the first rotating shafts close to the front side face, the first rotating shafts close to the front side face are also sleeved with first mounting blocks, and the first mounting blocks are fixedly connected with the right side face; an L-shaped mounting block is sleeved on the first rotating shaft close to the rear side surface, the L-shaped mounting block is fixedly connected with the rear side surface, and a limiting block is fixedly connected on the end surface of the first rotating shaft penetrating through the L-shaped mounting block;

the first roller shaft is provided with a square hole coaxial with the first roller shaft on the end face of the first roller shaft facing the front side surface, the first rotating shaft close to the front side surface comprises a cylindrical shaft and a square shaft which are integrally formed, the first mounting block and the first gear are sleeved outside the cylindrical shaft, and the square shaft is matched with the square hole and is inserted into the square hole.

Preferably, a first guide cylinder and a second guide cylinder are arranged on the inner surface of the right side face towards the first notch, the first guide cylinder and the second guide cylinder are respectively arranged below and above the first notch, the distance between the roller surfaces of the first guide cylinder and the second guide cylinder is larger than the thickness of the belt body, and the first guide cylinder and the second guide cylinder are fixedly connected with the right side face towards the right side face;

the front parts of the first roll shaft and the second roll shaft are also provided with a third guide cylinder, the third guide cylinder comprises a guide cylinder body with the length corresponding to the width of the belt body and limit round surfaces respectively fixedly connected with two end surfaces of the guide cylinder body, and the outer diameter of the limit round surfaces is larger than that of the guide cylinder body; and two ends of the third guide cylinder are respectively installed with the two second installation blocks.

Preferably, the motor is fixed on the inner surface of the bottom surface, a battery box is fixed on the inner surface of the left side surface, a battery box cover clamped with the left side surface is arranged on the left side surface towards the position of the battery box, and the battery box cover is arranged above the third notch.

Preferably, the motor comprises a motor body and a motor output shaft, and the motor output shaft is a crankshaft; a motor stopping anti-reverse mechanism arranged on the outer side of the crankshaft is arranged in the tightening control box;

the motor stopping anti-reverse mechanism comprises a guide pipe, an electromagnet and an iron anti-reverse rotating rod, wherein the axis of the guide pipe is arranged along the radial direction of a crankshaft, the electromagnet is fixed on the inner end face, far away from the crankshaft, of the guide pipe, the iron anti-reverse rotating rod is coaxially arranged in the guide pipe, one end of the iron anti-reverse rotating rod penetrates out of the end face, close to the crankshaft, of the guide pipe, the electromagnet is arranged in parallel with the motor and is synchronously powered on or powered off with the motor, the iron anti-reverse rotating rod loses suction force after the electromagnet is powered off, the iron anti-reverse rotating rod moves towards the side of the crankshaft, and is inserted into the side face of the crankshaft, so that the rotation of the crankshaft is limited;

the guide pipe is arranged at the top of the crankshaft, and a coil spring is fixed at the end part of the iron anti-reversion rod, which faces the electromagnet; the outer diameter of the iron anti-reversion rod is smaller than the inner diameter of the guide pipe, a shaft hole is formed in the end face, facing the crankshaft, of the guide pipe, and the diameter of the shaft hole is larger than the outer diameter of the iron anti-reversion rod.

Preferably, the motor is a forward and reverse motor, and the forward and reverse motor is connected with a first relay for controlling the motor shaft of the forward and reverse motor to rotate forward or reverse and a second relay for controlling the power on or power off of the forward and reverse motor.

Preferably, a timer and an alarm buzzer are further arranged in the tightening control box, and the timer counts the time for keeping the belt body in the tightening state.

Preferably, a controller is further arranged in the tightening control box, and the pressure sensor, the first relay, the second relay and the timer are all electrically connected with the controller; and a display screen and an operation button are also arranged on the tightening control box.

The tourniquet capable of automatically tightening has the beneficial effects that:

1. through setting up tightening means, realize the automatic of tourniquet and tighten up, assist pressure sensing device simultaneously, obtain the tourniquet in real time to the pressure that punctures the position, avoid tightening up the pressure too big, cause patient excessive pain, also avoid tightening up the pressure inadequately, local blood blocks poor effect, influences the puncture operation.

2. The design of tightening control box self structure is convenient for the quick replacement of tourniquet, changes easy operation.

3. The motor stops and prevents reversing the setting up of the mechanism, realize after tightening up the device and tighten up the operation and accomplish, to the motor because of tightening up the reaction force of pressure and being forced the reversal, influence the normal blood blocking effect of tourniquet.

4. The motor adopts a positive and negative rotation motor, and the positive rotation or the reverse rotation of the motor is controlled through the first relay, so that the tightening device can be used for loosening the hemostatic part through the tourniquet direction conveying.

5. The timer is arranged to realize the timing of the hemostatic operation time, so that medical accidents caused by the blood blocking time process are avoided.

Drawings

Fig. 1 is a schematic structural view of an automatic tightening tourniquet according to the technical scheme of the present utility model.

Fig. 2 is a schematic diagram of an internal structure of an automatic tightening tourniquet according to the present utility model.

Fig. 3 is a perspective view of an internal structure of an automatic tightening tourniquet according to the present utility model.

Fig. 4 is a front view showing an internal structure of an automatic tightening tourniquet according to the present utility model.

Fig. 5 is an internal structural view of the tightening control box according to the present embodiment, wherein the front side is not shown.

Fig. 6 is a rear view of the internal structure of the tightening control box according to the present embodiment, in which the rear side is not shown.

Fig. 7 is a schematic view of the installation of a first roller shaft in the present technical solution.

Fig. 8 is a schematic diagram of a motor structure according to the present technical solution.

Fig. 9 is a schematic structural view of a motor stop anti-reverse mechanism according to the present technical solution.

Fig. 10 is a schematic structural view of a third guide cylinder according to the present embodiment.

Detailed Description

In order to facilitate the understanding of the technical scheme of the present utility model by those skilled in the art, the technical scheme of the present utility model will be further described with reference to the accompanying drawings.

In this technical solution, as shown in fig. 1 and 2, the tourniquet capable of automatically tightening according to the technical solution of the present utility model includes a tightening control box 200, a pressure sensing device 10 and a tightening device 30 disposed in the tightening control box 200, and a belt body 100 having at least one end penetrating through the tightening control box 200. When the tightening device 30 drives the belt body 100 to tighten the puncture site, the pressure sensing device 10 obtains the tightening pressure value of the puncture site, and after the tightening pressure value reaches the preset pressure value, the tightening device 30 stops tightening.

In this embodiment, as shown in fig. 5, the tightening device 30 includes a motor 33, and a first roller 31 and a second roller 32 that are driven by the motor 33 and are disposed in parallel, and the belt body 100 passes between the first roller 31 and the second roller 32. The distance between the roller surfaces of the first roller shaft 31 and the second roller shaft 32 is smaller than the thickness of the belt body 100, and the first roller shaft 31 and the second roller shaft 32 rotate in opposite directions to tighten the belt body 100.

In this embodiment, as shown in fig. 5, the pressure sensing device 10 includes a pressure sensor 11 and a pressure contact 12, and the pressure contact 12 is disposed on a surface (bottom surface 202) of the tightening control box 200 facing the puncture site and contacts the pressure sensor 11 through a side surface of the tightening control box 200.

Based on the above technical scheme, the pressure contact 12 is aligned to the variable resistance device part of the pressure sensor 11 when the pressure sensor 11 is installed. When the belt body 100 is tightened, the pressure contact 12 is pressed inward by the puncture site, so that the pressure contact 12 is pressed toward the variable resistance device, and the resistance of the variable resistance device is changed. The pressure sensor 11 converts the electrical signal into a data signal, and directly obtains the pressure of the band 100 for tightening the puncture site, that is, the pressure of the puncture site, so that the puncture site pressure can be obtained in real time when the band is tightened. After the tightening pressure value reaches the preset pressure value, the tightening device 30 is controlled to stop tightening. Namely: through setting up tightening means 30, realize the automatic tightening of tourniquet, assist pressure sensing device 10 simultaneously, obtain the tourniquet in real time to the pressure that punctures the position, avoid tightening up the pressure too big, cause the patient to be painful excessively, also avoid tightening up the pressure inadequately, local blood blocks the effect poor, influences the puncture operation.

Based on the above technical scheme, the arrangement of the pressure contact 12 in the pressure sensing device 10 is convenient for pressure extraction of the puncture part, and is simple to operate. Before puncture, the annular structure formed by the tightening control box 200 and the belt body 100 is sleeved at a position about 10 cm-20 cm above the puncture part of the belt, the tightening control box 200 is rightly arranged, the pressure contact 12 is in contact with a human body, and in the tightening and loosening processes of the belt body, the pressure contact 12 is required to be in contact with the human body, so that the pressure contact 12 is prevented from deviating, and the accurate pressure value is convenient to obtain.

In this embodiment, the mounting plate 13 is fixed in the control box 50, and the pressure contact 12 is penetrated out from the lower surface and the bottom surface 202 of the control box 50 to the patient puncture site on the lower surface of the mounting plate where the pressure sensor 11 is fixed. A guide pin 15 penetrating through the mounting plate 13 is provided on the upper surface of the pressure contact 12, and a return spring 14 is sleeved on the guide pin 15. The work is that the lower surface of the pressure contact 12 is contacted with a puncture part, the puncture part pushes the pressure contact 12 downwards, the pressure contact 12 moves to the side of the pressure sensor 11 under the guide of the guide needle 15, the pressure sensor 11 is pressed tightly, the internal resistance value of the pressure sensor 11 is changed, and the pressure sensor 11 obtains the pressure value. In the upward movement of the pressure contact 12, the return spring 14 is compressed, after the belt body is loosened, the pressure between the tightening control box 200 and the puncture part is reduced, and the return spring is reset to drive the pressure contact 12 to move outwards, so that the pressure sensor 11 senses the reduced pressure.

In this embodiment, the belt body 100 is made of elastic material, such as polyester fiber material or rubber material, and has good blood flow blocking effect. The typical width of the belt body 100 is 1.8 cm-2.2 cm and the length is 40 cm-60 cm. The tightening control box 200 is rectangular, the wall thickness is not more than 3cm, the bottom surface 202 is square, and the width is 6 cm-6.5 cm. The four edges of the outer surface of the bottom surface 202 are rounded. A battery No. 7 is installed in the tightening control box 200 to supply power to the pressure sensing device 10 and the tightening device 30.

In this embodiment, as shown in fig. 7, a driving gear 333 is fixed on an output shaft of the motor 33, and a first gear 315 and a second gear 325 are fixed at one ends of the first roller shaft 31 and the second roller shaft 32, respectively. The number of teeth and the modulus of the first gear 315 and the second gear 325 are equal. The second gear 325 is externally engaged with the driving gear 333, and the first gear 315 is externally engaged with the second gear 325. The outer diameters of the first roll shaft 31 and the second roll shaft 32 are equal, and anti-skid patterns are respectively arranged on the outer surfaces of the first roll shaft 31 and the second roll shaft 32.

Based on the above-mentioned technology, the motor 33 drives the driving gear 333 to drive the first gear 315 and the second gear 325 to rotate in opposite directions, that is, the first roller shaft 31 and the second roller shaft 32 rotate in opposite directions, and when the first roller shaft 31 and the second roller shaft 32 rotate in opposite directions, the belt 100 is conveyed. In this technical scheme, when the belt body 100 is conveyed to the outside of the tightening control box 200, the belt body 100 is tightened, and when the belt body 100 is conveyed to the inside of the tightening control box 200, the belt body is loosened.

Based on the above technical scheme, be provided with anti-skidding line on first roller 31 and the outer surface of second roller 32 respectively, increase the frictional force of the outer roll surface of the area body and first roller 31 and second roller 32, ensure that the area body is carried, avoid appearing the area body phenomenon of skidding.

Based on the above technical scheme, the lengths of the first roller shaft 31 and the second roller shaft 32 are slightly larger than the width of the belt body, so that the belt body is fully contacted with the belt body, the belt body is conveyed, and meanwhile, the space occupied by the first roller shaft 31 and the second roller shaft 32 is reduced, so that the whole volume of the tightening control box 200 is reduced.

In this embodiment, as shown in fig. 1 and 2, the tightening control box 200 is rectangular and includes a top surface 201, a bottom surface 202, a front side surface 204, a rear side surface 203, a left side surface 205, and a right side surface 206. Along the axial direction of the annular structure formed by the band body 100 during puncturing, the front side 204 and the rear side 203, and the bottom surface 202, the front side 204, the left side 205 and the right side 206 are integrally formed. The top surface 201 is detachably fixed, and the rear side surface 203 is clamped with the left side surface 205 and the right side surface 206. The edges of the left side surface 205 and the right side surface 206, which are close to the rear side surface 203, are respectively provided with a clamping groove 221, and the rear side surface 203 is provided with a clamping strip 222 which is buckled with the clamping groove 221. When in clamping, the clamping strip 222 is pressed downwards into the clamping groove 221, and when the clamping strip is opened, the clamping strip 222 is outwards broken to be separated from the clamping groove 221, so that the rear side surface is opened. When the belt body is replaced, the rear side door 203 is opened or installed conveniently and quickly. Because the tourniquet is one for one person and is collected after use to be uniformly treated and destroyed or to be uniformly disinfected and then recycled, the structure of the clamping groove 221 and the clamping strip 222 is related to in the technical scheme, the rear side door 206 is convenient to open or install rapidly, and the replacement operation of the tourniquet is convenient.

In this embodiment, as shown in fig. 2, the axial direction of the second roller shaft 32 is parallel to the axial direction of the annular structure formed by the tape body 100 during puncturing. The right side surface 206 is provided with a first notch 207 and a second notch 208, wherein the central lines of the first notch 207 and the second notch 208 are parallel to the second roll shaft 32 and are U-shaped, the first notch 207 is arranged close to the bottom surface 202, and the second notch 208 is arranged above the first notch 207 and faces the middle position of the first roll shaft 31 and the second roll shaft 32; one end of the belt body 100 enters the tightening control box 200 through the first notch 207, passes between the first roller 31 and the second roller 32, and exits through the second notch 208.

The left side surface 205 is provided with a third notch 209 of a U-shaped groove which is opposite to and parallel to the first notch 207, and the other end of the belt body 100 penetrates into the tightening control box 200 through the third notch 209.

The length of the second roll shaft 32 is adapted to the width of the belt body 100; the bottoms of the first notch 207, the second notch 208 and the third notch 209 are matched with the end face position of the second roller shaft 32 facing the front side 204, the mouths of the first notch 207 and the second notch 208 penetrate out of the end face of the right side 206 facing the rear side 203, and the mouths of the third notch 209 penetrate out of the end face of the left side 205 facing the rear side 203.

Based on the above technical solution, the arrangement of the first notch 207, the second notch 208 and the third notch 209 facilitates the insertion of the strap body 100 into the tightening control box 200 or the removal of the strap body by the tightening control box 200, and is simple to operate. Of course, in order to avoid the band from being separated from the second slot 208 and the third slot 209, the two ends of the band need to be folded and fixed on themselves, and a stop lug is formed at the two ends of the band, and the stop lug is greater than the widths of the second slot 208 and the third slot 209, which belongs to the conventional operation in the prior art.

In the technical scheme, as shown in fig. 7, two ends of a second roll shaft 32 are fixedly connected with second

rotating shafts

321 and 323 respectively, and a second gear 325 is sleeved and fixed on the second rotating shaft 321 near the front side 204; the two second

rotating shafts

321 and 323 are respectively sleeved with a

second installation block

322 and 324, and the two second installation blocks 322 and 324 are fixedly connected with the right side surface 206, as shown in fig. 5.

In this technical solution, as shown in fig. 7, the two ends of the first roller shaft 31 are respectively and fixedly connected with first

rotating shafts

311, 313, the first gear 315 is sleeved and fixed on the first rotating shaft 31 near the front side 204, the first rotating shaft 311 near the front side 204 is also sleeved and provided with a first mounting block 312, and the first mounting block 312 is fixedly connected with the right side 206, as shown in fig. 5. An L-shaped mounting block 314 is sleeved on the first rotating shaft 313 near the rear side 203. The L-shaped mounting block 314 is fixedly connected with the rear side surface 203, and a limiting block 317 is fixedly connected on the end surface of the first rotating shaft 313 penetrating through the L-shaped mounting block 314.

In this embodiment, as shown in fig. 7, a square hole 316 coaxial with the first roller 31 is provided on an end surface of the first roller 31 facing the front side 204, and the first rotating shaft 311 near the front side 204 includes a cylindrical shaft 3111 and a square shaft 3112 that are integrally formed. The first mounting block 312 and the first gear 315 are both sleeved outside the cylindrical shaft 3111. Square shaft 3112 fits into square hole 316 and is inserted into square hole 316.

Based on the technical scheme in the three sections, the first roller shaft 31 and the second roller shaft 32 are installed, so that the problem that when the belt body 100 is installed between the first roller shaft 31 and the second roller shaft 32, the belt body and each installation block are dry is effectively avoided. The respective mounting blocks for mounting the first roller shaft 31 and the second roller shaft 32 expose the positions of the second notches opposite to each other, so that the belt body is inserted directly between the first roller shaft 31 and the second roller shaft 32 and into the second notches in the direction of the center line of the second notches.

Based on the technical scheme in the three sections, the first roller 31 is installed with the rear side 203, and when the rear side 203 is taken down, the first roller 31 is synchronously taken down, so that the space above the second roller 32 is yielded, and the belt body is conveniently placed on the second roller and inserted into the second groove. Because, in order to ensure that first roller and second roller tighten up the area body of area body, first roller and second roller rotate in opposite directions promptly, realize the transport of area body, distance just is less than area body thickness between first roller and the second roller like this, be unfavorable for flexible area body direct insertion between first roller and the second roller, so fixed with the trailing flank, after the trailing flank dismantles, first roller also takes off, just so be convenient for the area body place on the second roller, then place first roller on the second roller through the installation of trailing flank, and the area body is located between first roller and the second roller.

Based on the technical scheme in the three sections, the design of square holes and square shaft structures can ensure the installation of the first roll shaft and the transmission of the first roll shaft.

Based on the technical scheme in the above-mentioned three paragraphs, in order to be convenient for when the trailing flank installation further, first roller can get into smoothly on the second roller, as shown in FIG. 7, first roller and second roller length slightly are greater than the area body width, and set up the chamfer respectively on the terminal surface of first roller towards preceding side door and the terminal surface of second roller towards the trailing flank, be convenient for first roller insert second roller top and compress tightly the area body that is located on the second roller.

In this technical solution, as shown in fig. 4, a first guiding cylinder 41 and a second guiding cylinder 42 are disposed on the inner surface of the right side 206 toward the first notch 207, the first guiding cylinder 41 and the second guiding cylinder 42 are disposed below and above the first notch 207, respectively, and the distance between the roller surfaces of the first guiding cylinder 41 and the second guiding cylinder 42 is greater than the thickness of the belt body 100. The first guide cylinder 41 and the second guide cylinder 42 are fixedly connected with the right side surface 206.

Based on the above technical solution, the first guiding cylinder 41 and the second guiding cylinder 42 are arranged to guide the belt body 100, and meanwhile, guide and isolate the belt body, so that interference or scraping phenomenon between the belt body and other structural components is avoided.

In this embodiment, as shown in fig. 4, the front portions of the first roller shaft 31 and the second roller shaft 32 also have a third guide cylinder 43. As shown in fig. 10, the third guiding cylinder 43 includes a guiding cylinder 431 with a length corresponding to the width of the belt body 100 and limiting circular surfaces 432 respectively fixedly connected with two end surfaces of the guiding cylinder 431, and the outer diameter of the limiting circular surfaces 432 is larger than that of the guiding cylinder 431. The third guide cylinder 43 is mounted at both ends thereof with two second mounting blocks 322, 324, respectively. The third guide cylinder 43 guides the belt body so that the belt body enters between the first roller shaft and the second roller shaft in a specified direction. Meanwhile, the third guide cylinder 43 also has the function of limiting the belt body, so that the problem that the belt body is deviated along the width direction in conveying is avoided.

In this technical solution, as shown in fig. 3, the motor 33 is fixed on the inner surface of the bottom surface 202, the battery box 60 is fixed on the inner surface of the left side surface 205, the battery box cover clamped with the left side surface 205 is disposed on the left side surface 205 towards the position of the battery box 60, and the battery box cover is disposed above the third notch 209. A number 7 battery is installed in the battery box 60 to supply power to the pressure sensing device 10 and the tightening device 30. The battery box cover is clamped and connected to facilitate battery replacement operation.

Of course, a rechargeable battery can be installed in the battery box, and a charging interface connected with the rechargeable battery in the battery box is arranged on the left side surface 205 to charge the rechargeable battery in the battery box.

In this technical solution, as shown in fig. 7, the motor 33 includes a motor body 331 and a motor output shaft 332, and the motor output shaft 332 is a crankshaft. The tightening control box 200 is provided therein with a motor stop anti-reverse mechanism 34 disposed outside the crankshaft. As shown in fig. 9, the motor stop reverse rotation preventing mechanism 34 includes a guide tube 341 whose axis is arranged in the radial direction of the crankshaft, an electromagnet 342 fixed to the inner end surface of the guide tube 341 away from the crankshaft, and an iron reverse rotation preventing rod 343 coaxially disposed in the guide tube 341 and having one end penetrated out from the end surface of the guide tube 341 close to the crankshaft. The electromagnet 342 is disposed in parallel with the motor 33 and is synchronized to power up or power down with the motor 33. After the electromagnet 342 is powered off, the iron anti-reverse rotating rod 343 loses suction, the iron anti-reverse rotating rod 343 moves to the side of the crankshaft, is inserted into the side of the crankshaft, and the rotation of the crankshaft is limited.

Based on the above technical solution, the tightening device 30 works to tighten the band 10, so as to temporarily block local blood at the puncture site. After the tightening pressure value reaches the preset pressure value, the tightening device stops tightening, the motor 33 stops, and at the moment, the belt body is reset due to elastic deformation, namely, the belt body moves reversely, the first roller shaft and the second roller shaft are driven to move reversely, and the motor is driven to rotate reversely under the action of external force. In order to ensure that the puncture is successful, it is necessary to ensure that the belt remains in a tightened state for a certain period of time, so that the motor stop anti-reverse mechanism 34 is designed and the rotation of the crankshaft is restricted by the iron anti-reverse lever 343.

In this embodiment, as shown in fig. 9, a guide tube 341 is provided at the top of the crankshaft, and a coil spring 344 is fixed to the iron anti-reverse rod 343 toward the end of the electromagnet 341. The outer diameter of the iron anti-reverse rod 343 is smaller than the inner diameter of the guide tube 341, the end surface of the guide tube 341 facing the crankshaft is provided with a shaft hole 345, and the diameter of the shaft hole 345 is larger than the outer diameter of the iron anti-reverse rod 343.

Based on the above technical scheme, electromagnet 341 is powered, has magnetism, and attracts iron anti-reverse rotation rod 343 upwards, and the side of the crankshaft is yielded, and simultaneously motor 33 is started, and the crankshaft rotates. When the electromagnet 341 is powered off, the magnetic attraction force of the electromagnet disappears, the coil spring 344 pushes the iron anti-reversion rod 343 downwards, and the iron anti-reversion rod 343 is inserted into the side surface of the crankshaft, so that the crankshaft cannot complete one complete rotation, namely, the problem that the belt body drives the motor to reverse is solved, the problem that the belt body automatically slides and loosens between the first roll shaft and the second roll shaft is avoided, and therefore, the electromagnet 341 is powered off, and the belt body is kept in a tightening state.

Based on the above technical scheme, the outer diameter of the iron anti-reverse rod 343 is smaller than the inner diameter of the guide tube 341, the end surface of the guide tube 341 facing the crankshaft is provided with the shaft hole 345, and the diameter of the shaft hole 345 is larger than the outer diameter of the iron anti-reverse rod 343. So that the iron anti-reverse rotating rod 343 can incline at a certain angle in the downward pushing-out process, and thus the problem that the iron anti-reverse rotating rod 343 is rigidly collided when the bent part of the crankshaft faces the iron anti-reverse rotating rod 343 when the iron anti-reverse rotating rod 343 is pushed out downwards is avoided.

In the technical scheme, the motor 33 is a forward and reverse motor, and a first relay for controlling the motor 33 shaft of the forward and reverse motor to rotate forward or reverse and a second relay for controlling the forward and reverse motor to be powered on or powered off are connected to the forward and reverse motor. The first relay controls the power connection direction of the forward and reverse rotation motor, and has two paths, namely, forward rotation and reverse rotation of the motor are realized through the selection of the first relay path, and the motor can respectively realize tightening and loosening of the belt body during forward rotation and reverse rotation. The second relay controls whether the forward and reverse rotation motor is powered or not, and only has one passage. Generally, after the belt body tightens up the puncture part for a certain time, the motor can be controlled to rotate reversely through the first relay, so that the tourniquet is loosened, and the tourniquet is conveniently taken down from the patient body.

In this technical solution, a timer and an alarm buzzer are further disposed in the tightening control box 200, where the timer counts the time that the belt 100 is kept in the tightened state. The timer starts timing after the tightening pressure value reaches the preset pressure value, the fixed tightening state duration is generally set, and the alarm buzzer alarms after the time of the timer reaches the fixed tightening state duration, so that medical staff or patients are reminded to timely release the tourniquet or temporarily release the tourniquet, and medical accidents caused by overlong local blood choking time of the patients are avoided.

In this technical solution, as shown in fig. 5, a control box 50 is further disposed in the tightening control box 200, the control box is mounted on the bottom surface 202, and a controller 51 is disposed in the control box 50. The pressure sensor 11, the first relay, the second relay and the timer 52 are all electrically connected with the controller; the tightening control box 200 is further provided with a display screen 211 and operation buttons including a tightening button 213, a loosening button 214, and a main switch button 212. The display screen 211 is also provided with a sound guide horn hole 215, and the sound guide horn hole 215 transmits the beeping sound of the alarm buzzer. The timer 52 is mounted on the lower surface of the top surface 201.

Based on the technical scheme of the upper section, the controller 51 adopts a singlechip, and controls the second relay to obtain or lose electricity through the singlechip, so as to realize the control of obtaining or losing electricity of the motor, namely, control the start and stop of the motor. The single-chip microcomputer controls the electricity or the electricity losing of the first relay, so that the voltage direction control of the access motor is realized, the forward rotation or the reverse rotation of the motor is controlled, and the tightening or loosening of the belt body is controlled.

The pressure sensor 11 inputs the electric signal of tightening pressure value into the singlechip, and the singlechip converts the electric signal of tightening pressure value into digital signal and compares the pressure value with a preset pressure value, after the tightening pressure value reaches the preset pressure value, the singlechip loses power through controlling the second relay, the motor stops working, and the electromagnet on the crankshaft of the motor loses power, the iron anti-reversion rod 343 is pushed downwards, so that the crankshaft of the motor can not rotate in whole circle, namely the belt body can not slide reversely, and the belt body keeps in a tightening state. At this time, the timer is started to start counting, and the fixed tightening state is generally set to be 1 minute long.

If the puncture operation is completed within 1 minute, the medical staff can manually control the release button 214, at the moment, the single-chip microcomputer controls the first relay and the second relay, the first relay controls the motor to be connected with the voltage direction, the second relay controls the motor to be connected with the circuit, the motor is reversely rotated to realize the belt body release, and finally the tourniquet is taken down from the puncture part of the patient.

If the puncture operation is not completed within 1 minute, when the timer counts up to 1 minute, the alarm buzzer alarms to sound, and at the moment, medical staff manually controls the release button 214 and the manual control motor to rotate reversely, so that the belt body is temporarily released, and the blood flow blocking time process of the puncture part is avoided, and the safety of a patient is influenced.

If the puncture operation is completed within 1 minute, but the release button 214 is not actively operated, the tourniquet is still in a tightened state, at this time, the alarm buzzer alarms to generate beeping sound, meanwhile, the singlechip controls the first relay and the second relay, the first relay controls the motor to be connected with the voltage direction, and the second relay controls the motor to be connected with the circuit, so that the motor is reversely rotated to realize the release of the tourniquet, thereby avoiding the problems of influencing the safety of patients, causing medical accidents and the like.

In this technical scheme, when motor reversal is relaxed the area body, sense on pressure sensor 11 that the pressure value is less than the pressure value of setting for relaxing after, the motor stops the reversal, if need take down tourniquet has puncture position, for the operation of being convenient for, medical personnel can manual control relax button 214 for the motor continues reverse rotation again, also can directly take down trailing flank 204, then take down the area body by tightening control box 200 all can.

The controller (singlechip) used in the technical scheme adopts the conventional components and functions in the prior art, the single-row machine is not improved in the technical scheme, and the comparison of the pressure value and the processing of signals and the like by the singlechip in the technical scheme in operation are conventional methods in the prior art, so that the controller is not a scope of protection of the technical scheme.

The technical scheme of the utility model is described above by way of example with reference to the accompanying drawings, and it is apparent that the specific implementation of the utility model is not limited by the above manner, and it is within the scope of the utility model if various insubstantial improvements of the method concept and technical scheme of the utility model are adopted or the inventive concept and technical scheme are directly applied to other occasions without improvement.

Claims

1. The tourniquet capable of automatically tightening is characterized by comprising a tightening control box, a pressure sensing device and a tightening device which are arranged in the tightening control box, and a belt body at least one end of which passes through the tightening control box; when the tightening device drives the belt body to tighten the puncture part, the pressure sensing device obtains a tightening pressure value of the puncture part, and after the tightening pressure value reaches a preset pressure value, the tightening device stops tightening;

2. The automatic tightening tourniquet according to claim 1, wherein a driving gear is fixed on an output shaft of the motor, a first gear and a second gear are respectively fixed at one end of the first roller shaft and one end of the second roller shaft, and the number of teeth and the modulus of the first gear and the modulus of the second gear are equal; the second gear is externally meshed with the driving gear, and the first gear is externally meshed with the second gear; the outer diameters of the first roll shaft and the second roll shaft are equal, and anti-skid patterns are respectively arranged on the outer surfaces of the first roll shaft and the second roll shaft.

3. The automatic tightening tourniquet according to claim 1, wherein the tightening control box is in the shape of a cuboid comprising a top surface, a bottom surface, a front side surface, a rear side surface, a left side surface and a right side surface; the front side and the rear side are respectively arranged along the axial direction of an annular structure formed by the belt body during puncture, the bottom surface, the front side, the left side and the right side are integrally formed, the top surface is detachably fixed, and the rear side is clamped with the left side and the right side;

4. The tourniquet capable of automatically tightening according to claim 3, wherein the two ends of the second roller shaft are fixedly connected with second rotating shafts respectively, and the second gear is sleeved and fixed on the second rotating shafts close to the front side; the two second rotating shafts are respectively sleeved with a second mounting block, and the two second mounting blocks are fixedly connected with the right side face;

the two ends of the first roll shaft are respectively fixedly connected with a first rotating shaft, the first gear is sleeved and fixed on the first rotating shaft close to the front side face, a first mounting block is sleeved on the first rotating shaft close to the front side face, and the first mounting block is fixedly connected with the right side face; an L-shaped mounting block is sleeved on the first rotating shaft close to the rear side surface, the L-shaped mounting block is fixedly connected with the rear side surface, and a limiting block is fixedly connected on the end surface of the first rotating shaft penetrating through the L-shaped mounting block;

5. The automatic tightening tourniquet according to claim 3, wherein a first guide cylinder and a second guide cylinder are arranged on the inner surface of the right side face towards the first notch, the first guide cylinder and the second guide cylinder are respectively arranged below and above the first notch, the distance between the roller surfaces of the first guide cylinder and the second guide cylinder is larger than the thickness of the belt body, and the first guide cylinder and the second guide cylinder are fixedly connected with the right side face;

6. The automatic tightening tourniquet according to claim 3, wherein the motor is fixed on the inner surface of the bottom surface, a battery box is fixed on the inner surface of the left side surface, a battery box cover clamped with the left side surface is arranged on the left side surface towards the position of the battery box, and the battery box cover is arranged above the third notch.

7. The automatic tightening tourniquet of claim 1 wherein the motor comprises a motor body and a motor output shaft, the motor output shaft being a crankshaft; a motor stopping anti-reverse mechanism arranged on the outer side of the crankshaft is arranged in the tightening control box;

8. The automatic tightening tourniquet according to claim 1, wherein the motor is a forward and reverse motor, and the forward and reverse motor is connected with a first relay for controlling the motor shaft of the forward and reverse motor to rotate forward or reverse and a second relay for controlling the forward and reverse motor to be powered on or off.

9. The automatic tightening tourniquet according to claim 1, wherein a timer and an alarm buzzer are further arranged in the tightening control box, and the timer counts the time that the tourniquet body is kept in a tightened state.

10. The automatic tightening tourniquet according to claim 1, wherein a controller is further arranged in the tightening control box, and the pressure sensor, the first relay, the second relay and the timer are all electrically connected with the controller; and a display screen and an operation button are also arranged on the tightening control box.