CN112773452A - Tourniquet with two-way regulation - Google Patents

Abstract

The invention discloses a tourniquet with bidirectional adjustment, which comprises: the locking device comprises a first belt body, a second belt body and a locker, wherein a first buckling part and a second buckling part are respectively arranged at two ends of the second belt body, and the first buckling part and the second buckling part are respectively buckled and connected with two ends of the first belt body; the locking device is arranged on the second belt body and is positioned between the first buckling part and the second buckling part. The invention has simple structure, can ensure even stress at the wound, can control the force application in the further tightening process, is convenient to operate, can adapt to complex operating environment and has good hemostatic effect.

Description

Tourniquet with two-way regulation

Technical Field

The invention relates to the technical field of medical nursing instruments, in particular to a tourniquet with bidirectional adjustment.

Background

Tourniquet hemostasis is a simple and effective hemostasis method used for emergency treatment of extremity hemorrhage, and achieves the purpose of hemostasis by blocking blood circulation through compressing blood vessels. However, if the tourniquet is improperly used or used for a long time, the tourniquet can cause ischemia and necrosis of the distal limb, which results in disability.

At present, the tourniquet in the prior art has poor binding effect and is very inconvenient to use and operate, and particularly, in the using process, the binding effect of the tourniquet needs to look at the strength of a user, so that great inconvenience is brought to a wounded person and a doctor.

Therefore, the prior art has yet to be improved.

Disclosure of Invention

The inventor finds that the tourniquet in the prior art has the problems of poor restraining effect and inconvenient use and operation.

The present invention aims to alleviate or solve at least to some extent at least one of the above mentioned problems. The invention provides a tourniquet with bidirectional adjustment, which comprises:

a first belt body;

the first buckling part and the second buckling part are respectively buckled and connected with the two ends of the first belt body;

the locking device is arranged on the second belt body and is positioned between the first buckling part and the second buckling part.

In one embodiment, the second belt body includes a third belt body and a fourth belt body, the third belt body is provided with the first fastening portion, and the fourth belt body is provided with the second fastening portion.

In one embodiment, the third belt body and the fourth belt body are in fit and lap joint through a magic tape.

In one embodiment, the first and second fastening portions are double-ring fasteners.

In one embodiment, the locker includes:

the base is fixedly connected with the second belt body;

the adjusting piece is arranged in the base;

the check piece is arranged in the base;

the lock belt comprises a fixed end and a movable end, a plurality of buckle teeth are arranged between the fixed end and the movable end, the fixed end is fixedly connected with one end of the second belt body far away from the base, the movable end penetrates through the base, the buckle teeth are in meshed connection with the adjusting part, the buckle teeth are in meshed connection with the non-return part,

the base passes through the regulating part along lock area moves towards the stiff end to realize the shrink of closed clitellum, non return spare is used for restricting the base removes dorsad the stiff end direction, thereby realizes the locking of closed clitellum.

In one embodiment, the base is provided with a first arc-shaped shaft hole and a second arc-shaped shaft hole respectively;

the first arc-shaped shaft hole is connected with the adjusting piece, and the adjusting piece rotates along the first arc-shaped shaft hole;

the second arc-shaped shaft hole with the non-return piece is connected, just the non-return piece along the second arc-shaped shaft hole rotates.

In one embodiment, the adjustment member comprises:

the adjusting body comprises gear teeth in meshed connection with the buckling teeth and a handle for driving the gear teeth to rotate;

the adjusting body is sleeved on the first connecting shaft, and two ends of the first connecting shaft are sleeved in the first arc-shaped shaft hole;

the first elastic piece is arranged between the adjusting body and the base and used for keeping the adjusting body in an initial state.

In an embodiment, the first elastic member includes a first torsion spring, the first torsion spring is sleeved on the first connecting shaft, and a force arm of the first torsion spring abuts against the adjusting body and the base respectively.

In one embodiment, the check includes:

the check body is provided with a blocking strip which is in fit connection with the buckle teeth;

the non-return body is sleeved on the second connecting shaft, and two ends of the second connecting shaft are sleeved in the second arc-shaped shaft hole;

the second elastic piece is arranged between the check body and the base and used for keeping the check body in an initial state.

In an embodiment, the second elastic member includes a second torsion spring, the second torsion spring is sleeved on the second connecting shaft, and the force arm of the second torsion spring is respectively abutted to and connected with the check body and the base.

The invention has the beneficial effects that: according to the invention, the two ends of the first belt body are buckled and connected with the first buckling part and the second buckling part of the second belt body, so that force can be exerted from the two ends of the first belt body simultaneously in the hemostatic use process, the uniform stress at the hemostatic part can be ensured, and the stress concentration caused by single stress is avoided, so that the wound generates uncomfortable reaction; through being provided with the locker on the second area body, the locker can further tighten up closed clitellum, and can guarantee that the application of force is stable continuously even further tightening up the application of force in-process, avoid appearing exerting oneself difficult control and lead to wound secondary damage to appear, tourniquet with bidirectional adjustment in this embodiment can be applicable to complicated geographical environment through bidirectional adjustment in addition, avoid inconvenient difficult problem that leads to being difficult to stanch in the operation of the appearance of complex environment, consequently the tourniquet structure with bidirectional adjustment that this embodiment provided is simple, can guarantee that wound department atress is even, further tighten up in-process application of force controllable, high durability and convenient operation, can adapt to complicated operation environment, it is effectual to stanch.

Drawings

Fig. 1 is a schematic perspective view of a tourniquet with bidirectional adjustment provided by the present invention.

Fig. 2 is a schematic view of a specific embodiment of the tourniquet with bi-directional adjustment provided by the present invention.

Fig. 3 is a schematic view of another embodiment of the tourniquet with bi-directional adjustment provided by the present invention.

Fig. 4 is a cross-sectional view of a tourniquet having bi-directional adjustment provided by the present invention.

Fig. 5 is a schematic structural view of the load binder provided by the present invention.

Fig. 6 is a cross-sectional view of a load binder provided in the present invention.

Fig. 7 is a schematic view of a base structure of the locking device provided by the present invention.

Fig. 8 is a schematic view of the connection relationship of the base structure provided by the present invention.

Fig. 9 is a schematic structural view of an adjusting member in the load binder provided by the present invention.

Fig. 10 is a schematic structural view of a check member in the load binder provided in the present invention.

Wherein, in the figures, the respective reference numerals:

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Based on the problems existing in the prior art, the present embodiment provides a tourniquet with bidirectional adjustment, as shown in fig. 1 and 2 in particular, the tourniquet with bidirectional adjustment comprises: the locking device comprises a first belt body 10, a second belt body 20 and a locker 30, wherein a first buckling part 40 and a second buckling part 50 are respectively arranged at two ends of the second belt body 20, and the first buckling part 40 and the second buckling part 50 are respectively connected with two ends of the first belt body 10 in a buckling manner; the locking device 30 is disposed on the second belt body 20, the locking device 30 is disposed between the first buckling portion 40 and the second buckling portion 50, and the locking device 30 is buckled with the first belt body 10 through the first buckling portion 40 and the second buckling portion 50 to form a closed endless belt.

The working principle of the tourniquet with bidirectional adjustment in this embodiment is as follows:

firstly, a first belt body 10 is arranged below a wounded part, then a second belt body 20 is covered on the wounded part, then two ends of the first belt body 10 are respectively buckled and connected with a first buckling part 40 and a second buckling part 50 of the second belt body 20, two ends of the first belt body 10 can be pulled simultaneously to enable the first belt body 10 and the second belt body 20 to be tightened at the wounded part, so that the first belt body 10 and the second belt body 20 fix a hemostatic part, then a locker 30 is controlled to enable the locker 30 to further contract a closed annular belt formed by the first belt body 10 and the second belt body 20, wherein when two ends of the first belt body 10 are buckled and connected with the second belt body 20, the force process is difficult to control, sometimes the closed annular belt is too loose due to force, and a good hemostatic effect cannot be achieved; in order to further tighten the closed loop belt of the first belt body 10 and the second belt body 20, the force for pulling the two ends of the first belt body 10 needs to be further increased, the control and the holding are difficult to control in the force application process, and sometimes, the excessive force is applied, which may cause secondary injury to the wound, therefore, the locker 30 enables the closed loop belt to maintain stable, continuous and uniform force application in the further tightening process, and the phenomenon of secondary injury caused by the excessive force applied in the hemostasis process of the wound is avoided; in addition, the two ends of the first belt body 10 are buckled with the first buckling part and the second buckling part of the second belt body 20, so that the two ends of the first belt body can be pulled simultaneously, the first belt body and the second belt body form a closed annular belt, the two sides of the wound are stressed simultaneously in the force application process, the stress is uniform, and the stress concentration caused by single stress is avoided, so that the wound generates uncomfortable reaction; in addition, in the outdoor hemostasis rescue process, the geographic position is complicated, and sometimes the hemostasis rescue can only be performed at a specific position, both ends of the first belt body 10 in the embodiment are buckled and connected with the first buckling part and the second buckling part of the second belt body 20, one end of the first belt body 10 can be buckled and connected with the first buckling part or the second buckling part of the second belt body 20, then the other end of the first belt body 10 is selectively pulled according to the specific geographic position, so that the first belt body 10 is buckled and connected with the second belt body 20, and then the lock 30 is controlled to further tighten the closed ring belt, so that a good hemostasis effect is achieved, and the problem that the force application operation of the unidirectional closed ring belt is inconvenient in a complex environment can be avoided.

The tourniquet with bidirectional adjustment provided by the embodiment has the advantages that:

the tourniquet with bidirectional adjustment provided by the embodiment is buckled and connected with the first buckling part and the second buckling part of the second band body through the two ends of the first band body, so that force can be exerted from the two ends of the first band body simultaneously in the hemostatic use process, the uniform stress of a hemostatic part can be ensured, and the stress concentration caused by single stress is avoided, so that the wound generates uncomfortable reaction; through being provided with the locker on the second area body, the locker can further tighten up closed clitellum, and can guarantee that the application of force is stable continuously even further tightening up the application of force in-process, avoid appearing exerting oneself difficult control and lead to wound secondary damage to appear, tourniquet with bidirectional adjustment in this embodiment can be applicable to complicated geographical environment through bidirectional adjustment in addition, avoid inconvenient difficult problem that leads to being difficult to stanch in the operation of the appearance of complex environment, consequently the tourniquet structure with bidirectional adjustment that this embodiment provided is simple, can guarantee that wound department atress is even, further tighten up in-process application of force controllable, high durability and convenient operation, can adapt to complicated operation environment, it is effectual to stanch.

In an embodiment, referring to fig. 3 and 4, the second strap 20 includes a third strap 210 and a fourth strap 220 connected to the third strap 210, the third strap 210 is provided with a first fastening portion 40, the fourth strap 220 is provided with a second fastening portion 50, and the third strap 210 and the fourth strap 220 are detachably connected.

The tourniquet with bidirectional adjustment provided by the embodiment has the working principle that:

the first belt body 10 and the second belt body 20 are buckled and connected to form a closed belt, and the wound is subjected to hemostasis treatment through the closed belt, wherein the wound hemostasis is the position where the tourniquet needs to be attached to the wound; in the hemostasis treatment, the wound can be protected, and therefore, the tourniquet with bidirectional adjustment in the embodiment adopts two tightening adjustments, firstly, the closed loop is formed by pulling the two ends of the first band body 10 to be buckled and connected with the second band body 20, so that the closed loop is stably fixed at the wound, then, the locker 30 is adjusted to further contract and tighten the closed loop through the locker 30, so as to complete hemostasis on the wound, wherein the first tightening is realized by pulling the first band body 10 outwards, so that the first band body 10 and the second band body 20 are preliminarily locked; the second tightening is further adjusted by the locking device 30, in the second adjustment of the locking device 30, if the second band 20 is a continuous band, two ends of the second band 20 will be squeezed towards the middle to wrinkle, or form a wave to fold under the locking device 30, since the second band 20 is close to the wound, it is obvious that two ends of the second band 20 will be squeezed towards the middle to wrinkle, which may result in the second band 20 not fitting the wound, and a good hemostatic effect is difficult to achieve, therefore, in this embodiment, by providing two segmented third bands 210 and fourth bands 220 on the second band 20, wherein the third band 210 is provided with the first fastening portion 40, the fourth band 220 is provided with the second fastening portion 50, two ends of the first band 10 are respectively fastened with the first fastening portion 10 and the second fastening portion 50, when the locking device 30 is further tightened and adjusted, the third belt body 210 and the fourth belt body 220 are not extruded and wrinkled, so that the third belt body 210 and the fourth belt body 220 can be attached to wounds, and a good hemostatic effect is achieved.

Preferably, the third belt body 210 and the fourth belt body 220 are attached and overlapped by a hook and loop fastener. In order to avoid the phenomenon of squeezing and wrinkling of the second band body 20, the second band body 20 is provided with the third band body 210 and the fourth band body 220 which are separable, so that the third band body 210 and the fourth band body 220 can be ensured to be jointed with a wound in the further tightening and adjusting process of the tourniquet, and a good hemostasis effect is achieved.

As described above, the second band 20 is discontinuous and is composed of the third band 210 and the fourth band 220 which are separable, wherein, two ends of the first belt body 10 are respectively connected with the first buckling part 40 and the second buckling part 50, the third belt body 210 is provided with the first buckling part 40, the fourth belt body 220 is provided with the second buckling part 50, and the locker 30 is arranged between the first buckling part 40 and the second buckling part 50, therefore, if the locking device 30 has a mechanical failure, which may cause the complete failure of the entire tourniquet, the third strap body 210 and the fourth strap body 220 in this embodiment are fixedly connected by the hook-and-loop fastener, so that the locking device 30 can be ensured to be locked during the further tightening process, the third belt body 210 and the fourth belt body 220 are attached to the surface of a wound, double protection can be provided for the whole closed annular belt, the connection strength of the whole tourniquet is enhanced, and the phenomenon that the whole tourniquet is completely out of work after the locker 30 has mechanical failure is avoided. It should be understood that the third belt body 210 and the fourth belt body 220 are not limited to be joined by a hook and loop fastener so as to detachably connect the third belt body 210 and the fourth belt body 220, and other situations can be used, which are not limited herein.

Specifically, referring to fig. 1 and 2, in order to facilitate the operation and rapidly treat the hemostasis of the wound, the first fastening portion 40 and the second fastening portion 50 are both double-ring fasteners. The both ends of the second area body 10 are provided with the dicyclo knot respectively, and the both ends and the dicyclo of the first area body 10 are buckled and are connected, form closed clitellum, through the both ends of the first area body 10 of pulling, can tighten up closed clitellum, and the dicyclo in this embodiment is detained simple structure, and convenient operation is connected with the dicyclo knot lock through the both ends of the first area body 10 and is formed closed clitellum, reaches preliminary fixed hemostasis to the wound through tightening up closed clitellum. It should be understood that the fastening portion 20 is not limited to the above-mentioned double-ring fastener, and may be other cases, and is not limited thereto.

In one embodiment, referring to fig. 5 and 6, the locking device 30 includes: the base 320 is fixedly connected with the second strap body 20 through a second fixing hole 326, and the adjusting piece 330 and the check piece 340 are respectively arranged on the base 320;

the locking belt 310 comprises a fixed end 311 and a movable end 313 connected with the fixed end 311, a plurality of buckle teeth 314 are arranged between the fixed end 311 and the movable end 313, the fixed end 311 is fixedly connected with one end of the second belt body 20 far away from the base 320, the movable end 313 penetrates through the base 320, the buckle teeth 314 are in meshed connection with the adjusting part 330, and the buckle teeth 314 are in buckled connection with the check part 340;

the base 320 of the locking device 30 in this embodiment is moved toward the fixed end 311 by the adjusting member 330 along the locking band 310 to achieve the contraction of the closed loop band, and the check member 340 is used to restrict the movement of the base 320 away from the fixed end 311 to achieve the locking of the closed loop band.

In one embodiment, referring to fig. 7 and 8, the base 320 is provided with a first arc-shaped axle hole 324 and a second arc-shaped axle hole 325;

the first arc-shaped shaft hole 324 is connected with the adjusting part 330, and the adjusting part 330 can rotate along the first arc-shaped shaft hole 324; the adjusting element 330 in this embodiment is mounted on the stopping element 340, and when the stopping element 340 moves upward due to the application of force, the stopping element 340 will drive the adjusting element 330 to rotate upward along the first arc-shaped shaft hole 324, so as to separate the adjusting element 330 from the locking band 310.

The second arc-shaped shaft hole 325 is connected with the check piece 340, and the check piece 340 can rotate along the second arc-shaped shaft hole 325; in this embodiment, when the check 340 is located at the lower position of the second arc-shaped shaft hole 325, the check 340 is connected with the locking band 310 in a snap-fit manner, so as to achieve a self-locking state, and when the check 340 is located at the upper position of the second arc-shaped shaft hole 325, the check 340 is disconnected from the locking band 310.

Specifically, as shown in fig. 7, the base 320 is disposed in a U-shaped groove, the base 320 includes a bottom plate 321 and side plates 322 respectively disposed on two sides of the bottom plate 321, and the side plates 322 are respectively disposed with a first arc-shaped shaft hole 324 and a second arc-shaped shaft hole 325.

In one embodiment, as shown in fig. 9, the adjusting member 330 includes: the adjusting body 331 comprises a gear tooth 332 in meshed connection with the buckle 314 and a handle 333 for driving the gear tooth 332 to rotate; the first connecting shaft 350 is sleeved with an adjusting body 331, two ends of the first connecting shaft 350 are sleeved in the first arc-shaped shaft hole 324, and the adjusting body 331 can rotate along the first arc-shaped shaft hole 324 through the first connecting shaft 350;

the first elastic member 370 is disposed between the adjustment body 331 and the base 320, and the first elastic member 370 is used for maintaining the initial state of the adjustment body 331.

Specifically, the first elastic member 370 includes a first torsion spring, the first torsion spring is sleeved on the first connecting shaft 350, and a force arm of the first torsion spring is respectively abutted against the adjusting body 331 and the base 320. It should be understood that the first elastic member 370 is not limited to the first torsion spring described above, and may be otherwise provided, and is not limited thereto.

In one embodiment, as shown in FIG. 10, check 340 includes: a check body 341, a second connecting shaft 360, and a second elastic member 380,

the check body 341 is provided with a blocking strip 342 which is matched and connected with the buckle teeth 314; the non-return body 341 is sleeved on the second connecting shaft 360, and two ends of the second connecting shaft 360 are sleeved in the second arc-shaped shaft holes 325; second elastic member 380 is disposed between check body 341 and base 320, and second elastic member 380 is used for retaining check body 341 in an initial state.

Specifically, the second elastic member 380 includes a second torsion spring, the second torsion spring is sleeved on the second connecting shaft 360, and the force arm of the second torsion spring is respectively abutted to the check body 341 and the base 320. It should be understood that the second elastic member 380 is not limited to the first torsion spring, but may be in other situations, and is not limited thereto.

Preferably, referring to fig. 5 and 10, a rotating shaft 343 is disposed at an end of the check body 341 away from the second connecting shaft 360, the rotating shaft 343 is mounted on the step 323 of the side plate 322, an arc groove 344 is disposed at an end of the check body 341 away from the rotating shaft 343, wherein a front end of the adjusting body 331 is connected to the first connecting shaft 350, a rear end of the adjusting body 331 is mounted on the side plate 322 and the check body 341, and a check notch 334 is disposed on a top surface of the adjusting body 331, the adjusting body 331 is covered on the check body 341, that is, the check body 341 is disposed in the check notch 334, when the arc groove 344 on the check body 341 is pulled upward, the check body 341 rotates upward along the second arc shaft hole 325 through the rotating shaft 343, because the adjusting body 331 is mounted on the check body 341, the check body 341 abuts against the adjusting body 331 upward, so that the adjusting body 331 rotates upward along the first arc shaft hole 324, moreover, when the arc-shaped groove 344 of the check body 341 is pulled upward, the blocking bar 342 of the check body 341 will be separated from the buckle 314 of the locking band 310, and the gear 332 of the adjusting body 331 will also be separated from the buckle 314 of the locking band 310, at this time, the self-locking state of the locking device 30 is released, and the fixed end 311 of the locking band 310 can move away from the base 320.

The working principle of the lock in the embodiment is as follows:

inserting the locking band 310 into the base 320, wherein the buckle teeth 314 of the locking band 310 are respectively connected with the gear teeth 332 of the adjusting element 330 and the barrier 342 of the check element 340 in a buckling manner, so as to achieve a self-locking state, when the closed loop band needs to be further tightened, the handle 333 of the adjusting element 330 is pulled upwards, at this time, the gear teeth 332 of the adjusting element 330 can drive the locking band 310 to move along the base 320 through the buckle teeth 314, so that the fixed end 311 of the locking band 310 moves towards the base 320, so that the distance between the fixed end 311 of the locking band 310 and the base 320 is reduced, wherein the fixed end 311 of the locking band 310 and the base 320 are both fixedly connected with the second band body 10, and therefore, the distance between the fixed end 311 and the base 320 is reduced, so that the closed loop band; when the arc-shaped groove 344 is pulled backwards, the check body 341 rotates upwards along the second arc-shaped shaft hole 325 through the rotating shaft 343, and the check body 341 drives the adjusting body 331 upwards along the first arc-shaped shaft hole 324, at this time, the blocking strip 342 on the check body 341 and the gear teeth 332 on the adjusting body 331 are both separated from the buckle teeth 314 on the locking band 310, the fixed end 311 of the locking band 310 moves towards the side far away from the base 320, and the distance between the fixed end 311 and the base 320 is lengthened to enable the closed loop band to be loosened.

In one embodiment, in order to facilitate the extraction of the tourniquet, a handle 60 is further disposed on the second strap body 20, specifically, the handle 60 is disposed between the second strap body 20 and the locking strap 310, wherein both the handle 60 and the locking strap 310 are fixedly connected to the second strap body 20 through the first fixing hole 312.

In summary, the hemostatic band with bidirectional adjustment provided by the invention is buckled and connected with the first buckling part and the second buckling part of the second band body through the two ends of the first band body, so that force can be exerted from the two ends of the first band body simultaneously in the hemostatic use process, the uniform stress at the hemostatic part can be ensured, and the stress concentration caused by single stress is avoided, so that the wound generates uncomfortable reaction; the locker is arranged on the second band body, the locker can further tighten the closed girdle, and can ensure stable and uniform force application in the process of further tightening the force application, thereby avoiding the occurrence of secondary injury at a wound caused by hard control of the force application, in addition, the tourniquet with bidirectional regulation in the embodiment can be suitable for complex geographical environment through bidirectional regulation, and avoiding the difficult problem of difficult hemostasis caused by inconvenient operation in the complex environment, wherein, the second band body can adopt a third band body and a fourth band body with two sections, the second band body and the third band body are detachably connected, thereby not only ensuring the locker to realize the joint connection of the closed girdle and the wound surface in the process of further tightening, but also providing double protection for the whole closed girdle, strengthening the connection strength of the whole tourniquet, and avoiding the complete failure phenomenon of the whole tourniquet after the mechanical failure of the locker, therefore, the tourniquet with bidirectional adjustment provided by the invention has the advantages of simple structure, capability of ensuring that the wound is uniformly stressed, controllable force application in the further tightening process, convenience in operation, capability of adapting to a complex operation environment and good hemostasis effect.

It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims (10)

1. A tourniquet having bi-directional adjustment, comprising:

a first belt body;

the first buckling part and the second buckling part are respectively buckled and connected with the two ends of the first belt body;

the locking device is arranged on the second belt body and is positioned between the first buckling part and the second buckling part.

2. The tourniquet of claim 1 wherein the second strap comprises a third strap having the first engaging portion disposed thereon and a fourth strap having the second engaging portion disposed thereon.

3. The tourniquet of claim 2 wherein the third strap and the fourth strap are joined by a hook and loop fastener.

4. The tourniquet of claim 1 wherein the first and second clasp portions are each a double-looped clasp.

5. The tourniquet of claim 1 wherein the locker comprises:

the base is fixedly connected with the second belt body;

the adjusting piece is arranged in the base;

the check piece is arranged in the base;

the lock belt comprises a fixed end and a movable end, a plurality of buckle teeth are arranged between the fixed end and the movable end, the fixed end is fixedly connected with one end of the second belt body far away from the base, the movable end penetrates through the base, the buckle teeth are in meshed connection with the adjusting part, the buckle teeth are in meshed connection with the non-return part,

the base passes through the regulating part along lock area moves towards the stiff end to realize the shrink of closed clitellum, non return spare is used for restricting the base removes dorsad the stiff end direction, thereby realizes the locking of closed clitellum.

6. The tourniquet of claim 5 having two-way adjustment, wherein the base has a first arc-shaped axle hole and a second arc-shaped axle hole;

the first arc-shaped shaft hole is connected with the adjusting piece, and the adjusting piece rotates along the first arc-shaped shaft hole;

the second arc-shaped shaft hole with the non-return piece is connected, just the non-return piece along the second arc-shaped shaft hole rotates.

7. The tourniquet of claim 6 having bi-directional adjustment wherein the adjustment member comprises:

the adjusting body comprises gear teeth in meshed connection with the buckling teeth and a handle for driving the gear teeth to rotate;

the adjusting body is sleeved on the first connecting shaft, and two ends of the first connecting shaft are sleeved in the first arc-shaped shaft hole;

the first elastic piece is arranged between the adjusting body and the base and used for keeping the adjusting body in an initial state.

8. The tourniquet of claim 7 wherein the first resilient member comprises a first torsion spring, the first torsion spring is disposed around the first connection shaft, and a force arm of the first torsion spring is abutted against the adjustment body and the base.

9. The tourniquet of claim 6 wherein the backstop comprises:

the check body is provided with a blocking strip which is in fit connection with the buckle teeth;

the non-return body is sleeved on the second connecting shaft, and two ends of the second connecting shaft are sleeved in the second arc-shaped shaft hole;

the second elastic piece is arranged between the check body and the base and used for keeping the check body in an initial state.

10. The tourniquet of claim 9, wherein the second elastic member comprises a second torsion spring, the second torsion spring is sleeved on the second connecting shaft, and a force arm of the second torsion spring is abutted to the check body and the base.

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